Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 1 | /* |
Joey Armstrong | 2c03936 | 2024-02-04 18:51:52 -0500 | [diff] [blame^] | 2 | * Copyright 2018-2024 Open Networking Foundation (ONF) and the ONF Contributors |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at |
| 6 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 7 | * Unless required by applicable law or agreed to in writing, software |
| 8 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 9 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 10 | * See the License for the specific language governing permissions and |
| 11 | * limitations under the License. |
| 12 | */ |
| 13 | |
| 14 | package igmp |
| 15 | |
| 16 | import ( |
| 17 | "encoding/binary" |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 18 | "encoding/hex" |
| 19 | "errors" |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 20 | "fmt" |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 21 | "net" |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 22 | "strconv" |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 23 | "time" |
| 24 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 25 | "github.com/opencord/bbsim/internal/bbsim/packetHandlers" |
| 26 | |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 27 | "github.com/google/gopacket" |
| 28 | "github.com/google/gopacket/layers" |
| 29 | bbsim "github.com/opencord/bbsim/internal/bbsim/types" |
David K. Bainbridge | c415efe | 2021-08-19 13:05:21 +0000 | [diff] [blame] | 30 | "github.com/opencord/voltha-protos/v5/go/openolt" |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 31 | log "github.com/sirupsen/logrus" |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 32 | ) |
| 33 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 34 | func SendIGMPLeaveGroupV2(ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, uniId uint32, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 35 | gemPortId uint32, macAddress net.HardwareAddr, cTag int, pbit uint8, stream bbsim.Stream, groupAddress string) error { |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 36 | log.WithFields(log.Fields{ |
| 37 | "OnuId": onuId, |
| 38 | "SerialNumber": serialNumber, |
| 39 | "PortNo": portNo, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 40 | "GroupAddress": groupAddress, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 41 | }).Debugf("Entered SendIGMPLeaveGroupV2") |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 42 | igmp := createIGMPV2LeaveRequestPacket(groupAddress) |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 43 | pkt, err := serializeIgmpPacket(ponPortId, onuId, cTag, macAddress, pbit, igmp) |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 44 | |
| 45 | if err != nil { |
| 46 | log.WithFields(log.Fields{ |
| 47 | "OnuId": onuId, |
| 48 | "IntfId": ponPortId, |
| 49 | "SerialNumber": serialNumber, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 50 | "GroupAddress": groupAddress, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 51 | }).Errorf("Seriliazation of igmp packet failed : %s", err) |
| 52 | return err |
| 53 | } |
| 54 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 55 | // For IGMP testing, if voltha is not connected we do not have |
| 56 | // gemPortId, so set a unique gemPortId per ONU |
| 57 | if gemPortId == 0 { |
| 58 | gid, _ := strconv.ParseUint(fmt.Sprintf("%d%d", ponPortId, onuId), 10, 32) |
| 59 | gemPortId = uint32(gid) |
| 60 | } |
| 61 | |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 62 | data := &openolt.Indication_PktInd{ |
| 63 | PktInd: &openolt.PacketIndication{ |
| 64 | IntfType: "pon", |
| 65 | IntfId: ponPortId, |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 66 | GemportId: gemPortId, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 67 | Pkt: pkt, |
| 68 | PortNo: portNo, |
Girish Gowdra | 62f2429 | 2021-05-12 16:28:39 -0700 | [diff] [blame] | 69 | OnuId: onuId, |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 70 | UniId: uniId, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 71 | }, |
| 72 | } |
| 73 | //Sending IGMP packets |
| 74 | if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
Matteo Scandolo | 583f17d | 2020-02-13 10:35:17 -0800 | [diff] [blame] | 75 | log.WithFields(log.Fields{ |
| 76 | "OnuId": onuId, |
| 77 | "SerialNumber": serialNumber, |
| 78 | "PortNo": portNo, |
| 79 | "IntfId": ponPortId, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 80 | "GroupAddress": groupAddress, |
Matteo Scandolo | 583f17d | 2020-02-13 10:35:17 -0800 | [diff] [blame] | 81 | "err": err, |
| 82 | }).Error("Fail to send IGMP PktInd indication for ONU") |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 83 | return err |
| 84 | } |
| 85 | return nil |
| 86 | } |
| 87 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 88 | func SendIGMPMembershipReportV2(ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, uniId uint32, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 89 | gemPortId uint32, macAddress net.HardwareAddr, cTag int, pbit uint8, stream bbsim.Stream, groupAddress string) error { |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 90 | |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 91 | igmp := createIGMPV2MembershipReportPacket(groupAddress) |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 92 | pkt, err := serializeIgmpPacket(ponPortId, onuId, cTag, macAddress, pbit, igmp) |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 93 | |
| 94 | if err != nil { |
| 95 | log.WithFields(log.Fields{ |
| 96 | "OnuId": onuId, |
| 97 | "IntfId": ponPortId, |
| 98 | "SerialNumber": serialNumber, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 99 | "GroupAddress": groupAddress, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 100 | }).Errorf("Seriliazation of igmp packet failed : %s", err) |
| 101 | return err |
| 102 | } |
| 103 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 104 | // For IGMP testing, if voltha is not connected we do not have |
| 105 | // gemPortId, so set a unique gemPortId per ONU |
| 106 | if gemPortId == 0 { |
| 107 | gid, _ := strconv.ParseUint(fmt.Sprintf("%d%d", ponPortId, onuId), 10, 32) |
| 108 | gemPortId = uint32(gid) |
| 109 | } |
| 110 | |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 111 | data := &openolt.Indication_PktInd{ |
| 112 | PktInd: &openolt.PacketIndication{ |
| 113 | IntfType: "pon", |
| 114 | IntfId: ponPortId, |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 115 | GemportId: gemPortId, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 116 | Pkt: pkt, |
| 117 | PortNo: portNo, |
Girish Gowdra | 62f2429 | 2021-05-12 16:28:39 -0700 | [diff] [blame] | 118 | OnuId: onuId, |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 119 | UniId: uniId, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 120 | }, |
| 121 | } |
| 122 | //Sending IGMP packets |
| 123 | if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
Matteo Scandolo | 583f17d | 2020-02-13 10:35:17 -0800 | [diff] [blame] | 124 | log.WithFields(log.Fields{ |
| 125 | "OnuId": onuId, |
| 126 | "SerialNumber": serialNumber, |
| 127 | "PortNo": portNo, |
| 128 | "IntfId": ponPortId, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 129 | "GroupAddress": groupAddress, |
Matteo Scandolo | 583f17d | 2020-02-13 10:35:17 -0800 | [diff] [blame] | 130 | "err": err, |
| 131 | }).Errorf("Fail to send IGMP PktInd indication") |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 132 | return err |
| 133 | } |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 134 | |
| 135 | log.WithFields(log.Fields{ |
| 136 | "OnuId": onuId, |
| 137 | "SerialNumber": serialNumber, |
| 138 | "PortNo": portNo, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 139 | "GroupAddress": groupAddress, |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 140 | }).Debugf("Sent SendIGMPMembershipReportV2") |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 141 | return nil |
| 142 | } |
| 143 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 144 | func SendIGMPMembershipReportV3(ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, uniId uint32, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 145 | gemPortId uint32, macAddress net.HardwareAddr, cTag int, pbit uint8, stream bbsim.Stream, groupAddress string) error { |
| 146 | |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 147 | log.WithFields(log.Fields{ |
| 148 | "OnuId": onuId, |
| 149 | "SerialNumber": serialNumber, |
| 150 | "PortNo": portNo, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 151 | "GroupAddress": groupAddress, |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 152 | }).Debugf("Entered SendIGMPMembershipReportV3") |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 153 | igmp := createIGMPV3MembershipReportPacket(groupAddress) |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 154 | pkt, err := serializeIgmpPacket(ponPortId, onuId, cTag, macAddress, pbit, igmp) |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 155 | |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 156 | if err != nil { |
| 157 | log.WithFields(log.Fields{ |
| 158 | "OnuId": onuId, |
| 159 | "IntfId": ponPortId, |
| 160 | "SerialNumber": serialNumber, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 161 | "GroupAddress": groupAddress, |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 162 | }).Errorf("Seriliazation of igmp packet failed : %s", err) |
| 163 | return err |
| 164 | } |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 165 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 166 | // For IGMP testing, if voltha is not connected we do not have |
| 167 | // gemPortId, so set a unique gemPortId per ONU |
| 168 | if gemPortId == 0 { |
| 169 | gid, _ := strconv.ParseUint(fmt.Sprintf("%d%d", ponPortId, onuId), 10, 32) |
| 170 | gemPortId = uint32(gid) |
| 171 | } |
| 172 | |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 173 | data := &openolt.Indication_PktInd{ |
| 174 | PktInd: &openolt.PacketIndication{ |
| 175 | IntfType: "pon", |
| 176 | IntfId: ponPortId, |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 177 | GemportId: gemPortId, |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 178 | Pkt: pkt, |
| 179 | PortNo: portNo, |
Girish Gowdra | 62f2429 | 2021-05-12 16:28:39 -0700 | [diff] [blame] | 180 | OnuId: onuId, |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 181 | UniId: uniId, |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 182 | }, |
| 183 | } |
| 184 | //Sending IGMP packets |
| 185 | if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
Matteo Scandolo | 446fc9e | 2020-03-13 15:48:13 -0700 | [diff] [blame] | 186 | log.WithFields(log.Fields{ |
| 187 | "OnuId": onuId, |
| 188 | "IntfId": ponPortId, |
| 189 | "SerialNumber": serialNumber, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 190 | "GroupAddress": groupAddress, |
Matteo Scandolo | 446fc9e | 2020-03-13 15:48:13 -0700 | [diff] [blame] | 191 | "err": err, |
| 192 | }).Errorf("Fail to send IGMP PktInd indication") |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 193 | return err |
| 194 | } |
| 195 | return nil |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 196 | } |
| 197 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 198 | func HandleNextPacket(ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, uniId uint32, |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 199 | gemPortId uint32, macAddress net.HardwareAddr, pkt gopacket.Packet, cTag int, pbit uint8, groupAddresses map[string]int, stream bbsim.Stream) error { |
| 200 | |
| 201 | dot1qLayer := pkt.Layer(layers.LayerTypeDot1Q) |
| 202 | if dot1qLayer == nil { |
| 203 | log.WithFields(log.Fields{"Pkt": hex.EncodeToString(pkt.Data())}).Warnf("packet-is-not-tagged") |
| 204 | return errors.New("packet-is-not-tagged") |
| 205 | } |
| 206 | dot1q := dot1qLayer.(*layers.Dot1Q) |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 207 | |
| 208 | igmpLayer := pkt.Layer(layers.LayerTypeIGMP) |
| 209 | if igmpLayer == nil { |
| 210 | log.WithFields(log.Fields{ |
| 211 | "OnuId": onuId, |
| 212 | "SerialNumber": serialNumber, |
| 213 | "PortNo": portNo, |
| 214 | "Pkt": hex.EncodeToString(pkt.Data()), |
| 215 | }).Error("This is not an IGMP packet") |
| 216 | return errors.New("packet-is-not-igmp") |
| 217 | } |
| 218 | |
| 219 | log.WithFields(log.Fields{ |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 220 | "Pkt": hex.EncodeToString(pkt.Data()), |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 221 | }).Trace("IGMP packet") |
| 222 | |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 223 | var igmp *IGMP |
| 224 | igmpv1or2, ok := igmpLayer.(*layers.IGMPv1or2) |
| 225 | if ok { |
| 226 | igmp = &IGMP{ |
| 227 | Type: igmpv1or2.Type, |
| 228 | MaxResponseTime: igmpv1or2.MaxResponseTime, |
| 229 | Checksum: igmpv1or2.Checksum, |
| 230 | GroupAddress: igmpv1or2.GroupAddress, |
| 231 | Version: igmpv1or2.Version, |
| 232 | } |
| 233 | } else { |
| 234 | igmpv3, ok := igmpLayer.(*layers.IGMP) |
| 235 | if ok { |
| 236 | igmp = &IGMP{ |
| 237 | Type: igmpv3.Type, |
| 238 | MaxResponseTime: igmpv3.MaxResponseTime, |
| 239 | Checksum: igmpv3.Checksum, |
| 240 | GroupAddress: igmpv3.GroupAddress, |
| 241 | SupressRouterProcessing: igmpv3.SupressRouterProcessing, |
| 242 | RobustnessValue: igmpv3.RobustnessValue, |
| 243 | IntervalTime: igmpv3.IntervalTime, |
| 244 | SourceAddresses: igmpv3.SourceAddresses, |
| 245 | NumberOfGroupRecords: igmpv3.NumberOfGroupRecords, |
| 246 | NumberOfSources: igmpv3.NumberOfSources, |
| 247 | GroupRecords: igmpv3.GroupRecords, |
| 248 | Version: igmpv3.Version, |
| 249 | } |
| 250 | } else { |
| 251 | log.Warnf("could-not-parse-igmp-packet") |
| 252 | } |
| 253 | } |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 254 | |
| 255 | if igmp.Type == layers.IGMPMembershipQuery { |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 256 | // Send response to queries only if joined to a group |
| 257 | for groupAddr, vlan := range groupAddresses { |
| 258 | if vlan == int(dot1q.VLANIdentifier) { |
| 259 | _ = SendIGMPMembershipReportV2(ponPortId, onuId, serialNumber, portNo, uniId, gemPortId, macAddress, |
| 260 | vlan, pbit, stream, groupAddr) |
| 261 | } |
| 262 | } |
| 263 | if groupAddresses == nil { |
| 264 | log.WithFields(log.Fields{ |
| 265 | "OnuId": onuId, |
| 266 | "SerialNumber": serialNumber, |
| 267 | "PortNo": portNo, |
| 268 | "Pkt": hex.EncodeToString(pkt.Data()), |
| 269 | }).Trace("no-active-channels") |
| 270 | } |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | return nil |
| 274 | } |
| 275 | |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 276 | func createIGMPV3MembershipReportPacket(groupAddress string) *IGMP { |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 277 | |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 278 | // groupRecord1 := IGMPv3GroupRecord{ |
| 279 | // Type: IGMPv3GroupRecordType(IGMPIsIn), |
| 280 | // AuxDataLen: 0, // this should always be 0 as per IGMPv3 spec. |
| 281 | // NumberOfSources: 3, |
| 282 | // MulticastAddress: net.IPv4(224, 0, 0, 22), |
| 283 | // SourceAddresses: []net.IP{net.IPv4(15, 14, 20, 24), net.IPv4(15, 14, 20, 26), net.IPv4(15, 14, 20, 25)}, |
| 284 | // AuxData: 0, // NOT USED |
| 285 | // } |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 286 | |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 287 | // Keeping this as an example |
| 288 | // groupRecord1 := IGMPv3GroupRecord{ |
| 289 | // Type: IGMPv3GroupRecordType(IGMPIsIn), |
| 290 | // AuxDataLen: 0, // this should always be 0 as per IGMPv3 spec. |
| 291 | // NumberOfSources: 3, |
| 292 | // MulticastAddress: net.IPv4(224, 0, 0, 22), |
| 293 | // SourceAddresses: []net.IP{net.IPv4(15, 14, 20, 24), net.IPv4(15, 14, 20, 26), net.IPv4(15, 14, 20, 25)}, |
| 294 | // AuxData: 0, // NOT USED |
| 295 | // } |
| 296 | |
| 297 | groupRecord := layers.IGMPv3GroupRecord{ |
| 298 | Type: layers.IGMPv3GroupRecordType(IGMPIsEx), |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 299 | AuxDataLen: 0, // this should always be 0 as per IGMPv3 spec. |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 300 | NumberOfSources: 0, |
| 301 | MulticastAddress: net.ParseIP(groupAddress), |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 302 | AuxData: 0, // NOT USED |
| 303 | } |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 304 | |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 305 | igmpDefault := &IGMP{ |
| 306 | Type: layers.IGMPMembershipReportV3, //IGMPV3 Membership Report |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 307 | MaxResponseTime: time.Duration(1), |
| 308 | Checksum: 0, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 309 | GroupAddress: net.ParseIP(groupAddress), |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 310 | SupressRouterProcessing: false, |
| 311 | RobustnessValue: 0, |
| 312 | IntervalTime: time.Duration(1), |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 313 | NumberOfGroupRecords: 1, |
| 314 | NumberOfSources: 0, |
| 315 | GroupRecords: []layers.IGMPv3GroupRecord{groupRecord}, |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 316 | Version: 3, |
| 317 | } |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 318 | |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 319 | return igmpDefault |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 320 | } |
| 321 | |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 322 | func createIGMPV2MembershipReportPacket(groupAddress string) *IGMP { |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 323 | return &IGMP{ |
| 324 | Type: layers.IGMPMembershipReportV2, //IGMPV2 Membership Report |
| 325 | Checksum: 0, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 326 | GroupAddress: net.ParseIP(groupAddress), |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 327 | Version: 2, |
| 328 | } |
| 329 | } |
| 330 | |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 331 | func createIGMPV2LeaveRequestPacket(groupAddress string) *IGMP { |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 332 | return &IGMP{ |
| 333 | Type: layers.IGMPLeaveGroup, //IGMPV2 Leave Group |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 334 | MaxResponseTime: time.Duration(1), |
| 335 | Checksum: 0, |
Onur Kalinagac | 9f9faca | 2021-01-21 14:04:34 +0000 | [diff] [blame] | 336 | GroupAddress: net.ParseIP(groupAddress), |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 337 | Version: 2, |
| 338 | } |
| 339 | } |
| 340 | |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 341 | func serializeIgmpPacket(intfId uint32, onuId uint32, cTag int, srcMac net.HardwareAddr, pbit uint8, igmp *IGMP) ([]byte, error) { |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 342 | buffer := gopacket.NewSerializeBuffer() |
| 343 | options := gopacket.SerializeOptions{ |
| 344 | ComputeChecksums: true, |
| 345 | FixLengths: true, |
| 346 | } |
| 347 | |
| 348 | ethernetLayer := &layers.Ethernet{ |
| 349 | SrcMAC: srcMac, |
| 350 | DstMAC: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, |
| 351 | EthernetType: layers.EthernetTypeIPv4, |
| 352 | } |
| 353 | |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 354 | destinationIP := igmp.GroupAddress |
| 355 | if igmp.Version == 3 && igmp.Type == layers.IGMPMembershipReportV3 { |
| 356 | //All IGMPv3-capable multicast routers |
| 357 | destinationIP = net.ParseIP("224.0.0.22") |
| 358 | } |
| 359 | |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 360 | ipLayer := &layers.IPv4{ |
| 361 | Version: 4, |
| 362 | TOS: 0x10, |
| 363 | Id: 0, |
| 364 | TTL: 128, |
| 365 | SrcIP: []byte{0, 0, 0, 0}, |
Baris Ertas | 0ce2f7c | 2023-04-11 11:44:24 +0300 | [diff] [blame] | 366 | DstIP: destinationIP, |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 367 | Protocol: layers.IPProtocolIGMP, |
| 368 | Options: []layers.IPv4Option{{OptionType: 148, OptionLength: 4, OptionData: make([]byte, 0)}}, //Adding router alert option |
| 369 | } |
| 370 | |
| 371 | if err := gopacket.SerializeLayers(buffer, options, ethernetLayer, ipLayer, igmp); err != nil { |
| 372 | return nil, err |
| 373 | } |
| 374 | |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 375 | untaggedPkt := gopacket.NewPacket(buffer.Bytes(), layers.LayerTypeEthernet, gopacket.Default) |
| 376 | taggedPkt, err := packetHandlers.PushSingleTag(cTag, untaggedPkt, pbit) |
| 377 | |
| 378 | if err != nil { |
| 379 | log.Error("TagPacket") |
| 380 | return nil, err |
| 381 | } |
| 382 | |
| 383 | return taggedPkt.Data(), nil |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | //-----------------------------------------***********************--------------------------------- |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 387 | |
| 388 | type IGMP struct { |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 389 | layers.BaseLayer |
| 390 | Type layers.IGMPType |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 391 | MaxResponseTime time.Duration |
| 392 | Checksum uint16 |
| 393 | GroupAddress net.IP |
| 394 | SupressRouterProcessing bool |
| 395 | RobustnessValue uint8 |
| 396 | IntervalTime time.Duration |
| 397 | SourceAddresses []net.IP |
| 398 | NumberOfGroupRecords uint16 |
| 399 | NumberOfSources uint16 |
Baris Ertas | 53ab13c | 2023-05-25 16:31:48 +0300 | [diff] [blame] | 400 | GroupRecords []layers.IGMPv3GroupRecord |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 401 | Version uint8 // IGMP protocol version |
| 402 | } |
| 403 | |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 404 | // IGMPv3GroupRecord stores individual group records for a V3 Membership Report message. |
| 405 | type IGMPv3GroupRecord struct { |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 406 | Type IGMPv3GroupRecordType |
| 407 | AuxDataLen uint8 // this should always be 0 as per IGMPv3 spec. |
| 408 | NumberOfSources uint16 |
| 409 | MulticastAddress net.IP |
| 410 | SourceAddresses []net.IP |
| 411 | AuxData uint32 // NOT USED |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | type IGMPv3GroupRecordType uint8 |
| 415 | |
| 416 | const ( |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 417 | IGMPIsIn IGMPv3GroupRecordType = 0x01 // Type MODE_IS_INCLUDE, source addresses x |
| 418 | IGMPIsEx IGMPv3GroupRecordType = 0x02 // Type MODE_IS_EXCLUDE, source addresses x |
| 419 | IGMPToIn IGMPv3GroupRecordType = 0x03 // Type CHANGE_TO_INCLUDE_MODE, source addresses x |
| 420 | IGMPToEx IGMPv3GroupRecordType = 0x04 // Type CHANGE_TO_EXCLUDE_MODE, source addresses x |
| 421 | IGMPAllow IGMPv3GroupRecordType = 0x05 // Type ALLOW_NEW_SOURCES, source addresses x |
| 422 | IGMPBlock IGMPv3GroupRecordType = 0x06 // Type BLOCK_OLD_SOURCES, source addresses x |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 423 | ) |
| 424 | |
| 425 | func (i IGMPv3GroupRecordType) String() string { |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 426 | switch i { |
| 427 | case IGMPIsIn: |
| 428 | return "MODE_IS_INCLUDE" |
| 429 | case IGMPIsEx: |
| 430 | return "MODE_IS_EXCLUDE" |
| 431 | case IGMPToIn: |
| 432 | return "CHANGE_TO_INCLUDE_MODE" |
| 433 | case IGMPToEx: |
| 434 | return "CHANGE_TO_EXCLUDE_MODE" |
| 435 | case IGMPAllow: |
| 436 | return "ALLOW_NEW_SOURCES" |
| 437 | case IGMPBlock: |
| 438 | return "BLOCK_OLD_SOURCES" |
| 439 | default: |
| 440 | return "" |
| 441 | } |
Arjun E K | dd443f0 | 2020-02-07 15:24:01 +0000 | [diff] [blame] | 442 | } |
| 443 | |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 444 | // SerializeTo writes the serialized form of this layer into the |
| 445 | // SerializationBuffer, implementing gopacket.SerializableLayer. |
| 446 | // See the docs for gopacket.SerializableLayer for more info. |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 447 | func (igmp *IGMP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 448 | data, err := b.PrependBytes(8915) |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 449 | if err != nil { |
| 450 | return err |
| 451 | } |
| 452 | if igmp.Version == 2 { |
| 453 | data[0] = byte(igmp.Type) |
| 454 | data[1] = byte(igmp.MaxResponseTime) |
| 455 | data[2] = 0 |
| 456 | data[3] = 0 |
| 457 | copy(data[4:8], igmp.GroupAddress.To4()) |
| 458 | if opts.ComputeChecksums { |
| 459 | igmp.Checksum = tcpipChecksum(data, 0) |
| 460 | binary.BigEndian.PutUint16(data[2:4], igmp.Checksum) |
| 461 | } |
| 462 | } else if igmp.Version == 3 { |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 463 | |
Anand S Katti | 0954135 | 2020-01-29 15:54:01 +0530 | [diff] [blame] | 464 | data[0] = byte(igmp.Type) |
| 465 | data[1] = 0 |
| 466 | data[2] = 0 |
| 467 | data[3] = 0 |
| 468 | data[4] = 0 |
| 469 | data[5] = 0 |
| 470 | binary.BigEndian.PutUint16(data[6:8], igmp.NumberOfGroupRecords) |
| 471 | j := 8 |
| 472 | for i := uint16(0); i < igmp.NumberOfGroupRecords; i++ { |
| 473 | data[j] = byte(igmp.GroupRecords[i].Type) |
| 474 | data[j+1] = byte(0) |
| 475 | binary.BigEndian.PutUint16(data[j+2:j+4], igmp.GroupRecords[i].NumberOfSources) |
| 476 | copy(data[j+4:j+8], igmp.GroupRecords[i].MulticastAddress.To4()) |
| 477 | j = j + 8 |
| 478 | for m := uint16(0); m < igmp.GroupRecords[i].NumberOfSources; m++ { |
| 479 | copy(data[j:(j+4)], igmp.GroupRecords[i].SourceAddresses[m].To4()) |
| 480 | j = j + 4 |
| 481 | } |
| 482 | } |
| 483 | if opts.ComputeChecksums { |
| 484 | igmp.Checksum = tcpipChecksum(data, 0) |
| 485 | binary.BigEndian.PutUint16(data[2:4], igmp.Checksum) |
| 486 | } |
| 487 | } |
| 488 | return nil |
Arjun E K | 57a7fcb | 2020-01-30 06:44:45 +0000 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | // Calculate the TCP/IP checksum defined in rfc1071. The passed-in csum is any |
| 492 | // initial checksum data that's already been computed. |
| 493 | func tcpipChecksum(data []byte, csum uint32) uint16 { |
| 494 | // to handle odd lengths, we loop to length - 1, incrementing by 2, then |
| 495 | // handle the last byte specifically by checking against the original |
| 496 | // length. |
| 497 | length := len(data) - 1 |
| 498 | for i := 0; i < length; i += 2 { |
| 499 | // For our test packet, doing this manually is about 25% faster |
| 500 | // (740 ns vs. 1000ns) than doing it by calling binary.BigEndian.Uint16. |
| 501 | csum += uint32(data[i]) << 8 |
| 502 | csum += uint32(data[i+1]) |
| 503 | } |
| 504 | if len(data)%2 == 1 { |
| 505 | csum += uint32(data[length]) << 8 |
| 506 | } |
| 507 | for csum > 0xffff { |
| 508 | csum = (csum >> 16) + (csum & 0xffff) |
| 509 | } |
| 510 | return ^uint16(csum) |
| 511 | } |
| 512 | |
Matteo Scandolo | 618a658 | 2020-09-09 12:21:29 -0700 | [diff] [blame] | 513 | func (i *IGMP) LayerType() gopacket.LayerType { return layers.LayerTypeIGMP } |
| 514 | func (i *IGMP) LayerContents() []byte { return i.Contents } |
| 515 | func (i *IGMP) LayerPayload() []byte { return i.Payload } |