Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018-present Open Networking Foundation |
| 3 | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package dhcp |
| 18 | |
| 19 | import ( |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 20 | "context" |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 21 | "encoding/hex" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 22 | "errors" |
| 23 | "fmt" |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 24 | "net" |
| 25 | "reflect" |
| 26 | "strconv" |
| 27 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 28 | "github.com/google/gopacket" |
| 29 | "github.com/google/gopacket/layers" |
| 30 | "github.com/looplab/fsm" |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 31 | "github.com/opencord/bbsim/internal/bbsim/packetHandlers" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 32 | bbsim "github.com/opencord/bbsim/internal/bbsim/types" |
Matteo Scandolo | 3de9de0 | 2019-11-14 13:40:03 -0800 | [diff] [blame] | 33 | "github.com/opencord/voltha-protos/v2/go/openolt" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 34 | log "github.com/sirupsen/logrus" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 35 | ) |
| 36 | |
| 37 | var dhcpLogger = log.WithFields(log.Fields{ |
| 38 | "module": "DHCP", |
| 39 | }) |
| 40 | |
| 41 | var defaultParamsRequestList = []layers.DHCPOpt{ |
| 42 | layers.DHCPOptSubnetMask, |
| 43 | layers.DHCPOptBroadcastAddr, |
| 44 | layers.DHCPOptTimeOffset, |
| 45 | layers.DHCPOptRouter, |
| 46 | layers.DHCPOptDomainName, |
| 47 | layers.DHCPOptDNS, |
| 48 | layers.DHCPOptDomainSearch, |
| 49 | layers.DHCPOptHostname, |
| 50 | layers.DHCPOptNetBIOSTCPNS, |
| 51 | layers.DHCPOptNetBIOSTCPScope, |
| 52 | layers.DHCPOptInterfaceMTU, |
| 53 | layers.DHCPOptClasslessStaticRoute, |
| 54 | layers.DHCPOptNTPServers, |
| 55 | } |
| 56 | |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 57 | func createDefaultDHCPReq(oltId int, intfId uint32, onuId uint32, mac net.HardwareAddr) layers.DHCPv4 { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 58 | // NOTE we want to generate a unique XID, the easiest way is to concat the PON ID and the ONU ID |
| 59 | // we increment them by one otherwise: |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 60 | // - OLT: 0 PON: 0 ONU: 62 = 062 -> 62 |
| 61 | // - OLT: 0 PON: 6 ONU: 2 = 62 -> 62 |
| 62 | xid, err := strconv.Atoi(fmt.Sprintf("%d%d%d", oltId+1, intfId+1, onuId+1)) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 63 | if err != nil { |
| 64 | log.Fatal("Can't generate unique XID for ONU") |
| 65 | } |
| 66 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 67 | return layers.DHCPv4{ |
| 68 | Operation: layers.DHCPOpRequest, |
| 69 | HardwareType: layers.LinkTypeEthernet, |
| 70 | HardwareLen: 6, |
| 71 | HardwareOpts: 0, |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 72 | Xid: uint32(xid), |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 73 | ClientHWAddr: mac, |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 74 | } |
| 75 | } |
| 76 | |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 77 | func createDefaultOpts(intfId uint32, onuId uint32) []layers.DHCPOption { |
| 78 | hostname := []byte(fmt.Sprintf("%d.%d.bbsim.onf.org", intfId, onuId)) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 79 | opts := []layers.DHCPOption{} |
| 80 | opts = append(opts, layers.DHCPOption{ |
| 81 | Type: layers.DHCPOptHostname, |
| 82 | Data: hostname, |
| 83 | Length: uint8(len(hostname)), |
| 84 | }) |
| 85 | |
| 86 | bytes := []byte{} |
| 87 | for _, option := range defaultParamsRequestList { |
| 88 | bytes = append(bytes, byte(option)) |
| 89 | } |
| 90 | |
| 91 | opts = append(opts, layers.DHCPOption{ |
| 92 | Type: layers.DHCPOptParamsRequest, |
| 93 | Data: bytes, |
| 94 | Length: uint8(len(bytes)), |
| 95 | }) |
| 96 | return opts |
| 97 | } |
| 98 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 99 | func createDHCPDisc(oltId int, intfId uint32, onuId uint32, gemPort uint32, macAddress net.HardwareAddr) *layers.DHCPv4 { |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 100 | dhcpLayer := createDefaultDHCPReq(oltId, intfId, onuId, macAddress) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 101 | defaultOpts := createDefaultOpts(intfId, onuId) |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 102 | dhcpLayer.Options = append([]layers.DHCPOption{{ |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 103 | Type: layers.DHCPOptMessageType, |
| 104 | Data: []byte{byte(layers.DHCPMsgTypeDiscover)}, |
| 105 | Length: 1, |
| 106 | }}, defaultOpts...) |
| 107 | |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 108 | data := []byte{0xcd, 0x28, 0xcb, 0xcc, 0x00, 0x01, 0x00, 0x01, |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 109 | 0x23, 0xed, 0x11, 0xec, 0x4e, 0xfc, 0xcd, byte(intfId), byte(onuId), byte(gemPort)} //FIXME use the OLT-ID in here |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 110 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 111 | Type: layers.DHCPOptClientID, |
| 112 | Data: data, |
| 113 | Length: uint8(len(data)), |
| 114 | }) |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 115 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 116 | return &dhcpLayer |
| 117 | } |
| 118 | |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 119 | func createDHCPReq(oltId int, intfId uint32, onuId uint32, macAddress net.HardwareAddr, offeredIp net.IP) *layers.DHCPv4 { |
| 120 | dhcpLayer := createDefaultDHCPReq(oltId, intfId, onuId, macAddress) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 121 | defaultOpts := createDefaultOpts(intfId, onuId) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 122 | |
| 123 | dhcpLayer.Options = append(defaultOpts, layers.DHCPOption{ |
| 124 | Type: layers.DHCPOptMessageType, |
| 125 | Data: []byte{byte(layers.DHCPMsgTypeRequest)}, |
| 126 | Length: 1, |
| 127 | }) |
| 128 | |
| 129 | data := []byte{182, 21, 0, 128} |
| 130 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 131 | Type: layers.DHCPOptServerID, |
| 132 | Data: data, |
| 133 | Length: uint8(len(data)), |
| 134 | }) |
| 135 | |
| 136 | data = []byte{0xcd, 0x28, 0xcb, 0xcc, 0x00, 0x01, 0x00, 0x01, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 137 | 0x23, 0xed, 0x11, 0xec, 0x4e, 0xfc, 0xcd, 0x28, byte(intfId), byte(onuId)} |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 138 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 139 | Type: layers.DHCPOptClientID, |
| 140 | Data: data, |
| 141 | Length: uint8(len(data)), |
| 142 | }) |
| 143 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 144 | // NOTE we should not request a specific IP, or we should request the one that has been offered |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 145 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 146 | Type: layers.DHCPOptRequestIP, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 147 | Data: offeredIp, |
| 148 | Length: uint8(len(offeredIp)), |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 149 | }) |
| 150 | return &dhcpLayer |
| 151 | } |
| 152 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 153 | func serializeDHCPPacket(intfId uint32, onuId uint32, cTag int, srcMac net.HardwareAddr, dhcp *layers.DHCPv4, pbit uint8) ([]byte, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 154 | buffer := gopacket.NewSerializeBuffer() |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 155 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 156 | options := gopacket.SerializeOptions{ |
| 157 | ComputeChecksums: true, |
| 158 | FixLengths: true, |
| 159 | } |
| 160 | |
| 161 | ethernetLayer := &layers.Ethernet{ |
| 162 | SrcMAC: srcMac, |
| 163 | DstMAC: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, |
| 164 | EthernetType: layers.EthernetTypeIPv4, |
| 165 | } |
| 166 | |
| 167 | ipLayer := &layers.IPv4{ |
| 168 | Version: 4, |
| 169 | TOS: 0x10, |
| 170 | TTL: 128, |
| 171 | SrcIP: []byte{0, 0, 0, 0}, |
| 172 | DstIP: []byte{255, 255, 255, 255}, |
| 173 | Protocol: layers.IPProtocolUDP, |
| 174 | } |
| 175 | |
| 176 | udpLayer := &layers.UDP{ |
| 177 | SrcPort: 68, |
| 178 | DstPort: 67, |
| 179 | } |
| 180 | |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 181 | _ = udpLayer.SetNetworkLayerForChecksum(ipLayer) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 182 | if err := gopacket.SerializeLayers(buffer, options, ethernetLayer, ipLayer, udpLayer, dhcp); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 183 | dhcpLogger.Error("SerializeLayers") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 184 | return nil, err |
| 185 | } |
| 186 | |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 187 | untaggedPkt := gopacket.NewPacket(buffer.Bytes(), layers.LayerTypeEthernet, gopacket.Default) |
| 188 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 189 | taggedPkt, err := packetHandlers.PushSingleTag(cTag, untaggedPkt, pbit) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 190 | if err != nil { |
| 191 | dhcpLogger.Error("TagPacket") |
| 192 | return nil, err |
| 193 | } |
| 194 | |
| 195 | return gopacket.Payload(taggedPkt.Data()), nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 196 | } |
| 197 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 198 | func GetDhcpLayer(pkt gopacket.Packet) (*layers.DHCPv4, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 199 | layerDHCP := pkt.Layer(layers.LayerTypeDHCPv4) |
| 200 | dhcp, _ := layerDHCP.(*layers.DHCPv4) |
| 201 | if dhcp == nil { |
| 202 | return nil, errors.New("Failed-to-extract-DHCP-layer") |
| 203 | } |
| 204 | return dhcp, nil |
| 205 | } |
| 206 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 207 | func GetDhcpMessageType(dhcp *layers.DHCPv4) (layers.DHCPMsgType, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 208 | for _, option := range dhcp.Options { |
| 209 | if option.Type == layers.DHCPOptMessageType { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 210 | if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeDiscover)}) { |
| 211 | return layers.DHCPMsgTypeDiscover, nil |
| 212 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeOffer)}) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 213 | return layers.DHCPMsgTypeOffer, nil |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 214 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeRequest)}) { |
| 215 | return layers.DHCPMsgTypeRequest, nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 216 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeAck)}) { |
| 217 | return layers.DHCPMsgTypeAck, nil |
| 218 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeRelease)}) { |
| 219 | return layers.DHCPMsgTypeRelease, nil |
| 220 | } else { |
| 221 | msg := fmt.Sprintf("This type %x is not supported", option.Data) |
| 222 | return 0, errors.New(msg) |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | return 0, errors.New("Failed to extract MsgType from dhcp") |
| 227 | } |
| 228 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 229 | // returns the DHCP Layer type or error if it's not a DHCP Packet |
| 230 | func GetDhcpPacketType(pkt gopacket.Packet) (string, error) { |
| 231 | dhcpLayer, err := GetDhcpLayer(pkt) |
| 232 | if err != nil { |
| 233 | return "", err |
| 234 | } |
| 235 | dhcpMessageType, err := GetDhcpMessageType(dhcpLayer) |
| 236 | if err != nil { |
| 237 | return "", err |
| 238 | } |
| 239 | |
| 240 | return dhcpMessageType.String(), nil |
| 241 | } |
| 242 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 243 | func sendDHCPPktIn(msg bbsim.ByteMsg, portNo uint32, gemPortId uint32, stream bbsim.Stream) error { |
Matteo Scandolo | eb6b5af | 2020-06-24 16:23:58 -0700 | [diff] [blame] | 244 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 245 | dhcpLogger.WithFields(log.Fields{ |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 246 | "OnuId": msg.OnuId, |
| 247 | "IntfId": msg.IntfId, |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 248 | "GemPort": gemPortId, |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 249 | "Type": "DHCP", |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 250 | "Pkt": hex.EncodeToString(msg.Bytes), |
| 251 | }).Trace("Sending DHCP packet in") |
Matteo Scandolo | eb6b5af | 2020-06-24 16:23:58 -0700 | [diff] [blame] | 252 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 253 | data := &openolt.Indication_PktInd{PktInd: &openolt.PacketIndication{ |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 254 | IntfType: "pon", |
| 255 | IntfId: msg.IntfId, |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 256 | GemportId: gemPortId, |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 257 | Pkt: msg.Bytes, |
| 258 | PortNo: portNo, |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 259 | }} |
| 260 | |
| 261 | if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
| 262 | dhcpLogger.Errorf("Fail to send DHCP PktInd indication. %v", err) |
| 263 | return err |
| 264 | } |
| 265 | return nil |
| 266 | } |
| 267 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 268 | func sendDHCPRequest(oltId int, ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, |
| 269 | cTag int, gemPortId uint32, onuStateMachine *fsm.FSM, onuHwAddress net.HardwareAddr, |
| 270 | offeredIp net.IP, pbit uint8, stream bbsim.Stream) error { |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 271 | dhcp := createDHCPReq(oltId, ponPortId, onuId, onuHwAddress, offeredIp) |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 272 | pkt, err := serializeDHCPPacket(ponPortId, onuId, cTag, onuHwAddress, dhcp, pbit) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 273 | |
| 274 | if err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 275 | dhcpLogger.WithFields(log.Fields{ |
| 276 | "OnuId": onuId, |
| 277 | "IntfId": ponPortId, |
| 278 | "OnuSn": serialNumber, |
| 279 | "OfferedIp": offeredIp.String(), |
| 280 | }).Errorf("Cannot serializeDHCPPacket: %s", err) |
| 281 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 282 | return err |
| 283 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 284 | return err |
| 285 | } |
| 286 | // NOTE I don't think we need to tag the packet |
| 287 | //taggedPkt, err := packetHandlers.PushSingleTag(cTag, pkt) |
| 288 | |
| 289 | msg := bbsim.ByteMsg{ |
| 290 | IntfId: ponPortId, |
| 291 | OnuId: onuId, |
| 292 | Bytes: pkt, |
| 293 | } |
| 294 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 295 | if err := sendDHCPPktIn(msg, portNo, gemPortId, stream); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 296 | dhcpLogger.WithFields(log.Fields{ |
| 297 | "OnuId": onuId, |
| 298 | "IntfId": ponPortId, |
| 299 | "OnuSn": serialNumber, |
| 300 | }).Errorf("Cannot sendDHCPPktIn: %s", err) |
| 301 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 302 | return err |
| 303 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 304 | return err |
| 305 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 306 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 307 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 308 | "OnuId": onuId, |
| 309 | "IntfId": ponPortId, |
| 310 | "OnuSn": serialNumber, |
| 311 | "OfferedIp": offeredIp.String(), |
| 312 | }).Infof("DHCPRequest Sent") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 313 | return nil |
| 314 | } |
| 315 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 316 | func updateDhcpFailed(onuId uint32, ponPortId uint32, serialNumber string, onuStateMachine *fsm.FSM) error { |
| 317 | if err := onuStateMachine.Event("dhcp_failed"); err != nil { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 318 | dhcpLogger.WithFields(log.Fields{ |
| 319 | "OnuId": onuId, |
| 320 | "IntfId": ponPortId, |
| 321 | "OnuSn": serialNumber, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 322 | }).Errorf("Error while transitioning ONU State %v", err) |
| 323 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 324 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 325 | return nil |
| 326 | } |
| 327 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 328 | func SendDHCPDiscovery(oltId int, ponPortId uint32, onuId uint32, cTag int, gemPortId uint32, |
| 329 | serialNumber string, portNo uint32, stateMachine *fsm.FSM, onuHwAddress net.HardwareAddr, |
| 330 | pbit uint8, stream bbsim.Stream) error { |
| 331 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 332 | dhcp := createDHCPDisc(oltId, ponPortId, onuId, gemPortId, onuHwAddress) |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 333 | pkt, err := serializeDHCPPacket(ponPortId, onuId, cTag, onuHwAddress, dhcp, pbit) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 334 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 335 | if err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 336 | dhcpLogger.WithFields(log.Fields{ |
| 337 | "OnuId": onuId, |
| 338 | "IntfId": ponPortId, |
| 339 | "OnuSn": serialNumber, |
| 340 | }).Errorf("Cannot serializeDHCPPacket: %s", err) |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 341 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, stateMachine); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 342 | return err |
| 343 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 344 | return err |
| 345 | } |
| 346 | // NOTE I don't think we need to tag the packet |
| 347 | //taggedPkt, err := packetHandlers.PushSingleTag(cTag, pkt) |
| 348 | |
| 349 | msg := bbsim.ByteMsg{ |
| 350 | IntfId: ponPortId, |
| 351 | OnuId: onuId, |
| 352 | Bytes: pkt, |
| 353 | } |
| 354 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 355 | if err := sendDHCPPktIn(msg, portNo, gemPortId, stream); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 356 | dhcpLogger.WithFields(log.Fields{ |
| 357 | "OnuId": onuId, |
| 358 | "IntfId": ponPortId, |
| 359 | "OnuSn": serialNumber, |
| 360 | }).Errorf("Cannot sendDHCPPktIn: %s", err) |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 361 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, stateMachine); err != nil { |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 362 | return err |
| 363 | } |
| 364 | return err |
| 365 | } |
| 366 | dhcpLogger.WithFields(log.Fields{ |
| 367 | "OnuId": onuId, |
| 368 | "IntfId": ponPortId, |
| 369 | "OnuSn": serialNumber, |
| 370 | }).Infof("DHCPDiscovery Sent") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 371 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 372 | if err := stateMachine.Event("dhcp_discovery_sent"); err != nil { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 373 | dhcpLogger.WithFields(log.Fields{ |
| 374 | "OnuId": onuId, |
| 375 | "IntfId": ponPortId, |
| 376 | "OnuSn": serialNumber, |
| 377 | }).Errorf("Error while transitioning ONU State %v", err) |
| 378 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 379 | return nil |
| 380 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 381 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 382 | func HandleNextPacket(oltId int, onuId uint32, ponPortId uint32, serialNumber string, portNo uint32, |
| 383 | cTag int, gemPortId uint32, onuHwAddress net.HardwareAddr, onuStateMachine *fsm.FSM, |
| 384 | pkt gopacket.Packet, pbit uint8, stream bbsim.Stream) error { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 385 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 386 | dhcpLayer, err := GetDhcpLayer(pkt) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 387 | if err != nil { |
| 388 | dhcpLogger.WithFields(log.Fields{ |
| 389 | "OnuId": onuId, |
| 390 | "IntfId": ponPortId, |
| 391 | "OnuSn": serialNumber, |
| 392 | }).Errorf("Can't get DHCP Layer from Packet: %v", err) |
| 393 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 394 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 395 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 396 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 397 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 398 | dhcpMessageType, err := GetDhcpMessageType(dhcpLayer) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 399 | if err != nil { |
| 400 | dhcpLogger.WithFields(log.Fields{ |
| 401 | "OnuId": onuId, |
| 402 | "IntfId": ponPortId, |
| 403 | "OnuSn": serialNumber, |
| 404 | }).Errorf("Can't get DHCP Message Type from DHCP Layer: %v", err) |
| 405 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 406 | return err |
| 407 | } |
| 408 | return err |
| 409 | } |
| 410 | |
| 411 | if dhcpLayer.Operation == layers.DHCPOpReply { |
| 412 | if dhcpMessageType == layers.DHCPMsgTypeOffer { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 413 | offeredIp := dhcpLayer.YourClientIP |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 414 | if err := sendDHCPRequest(oltId, ponPortId, onuId, serialNumber, portNo, cTag, gemPortId, onuStateMachine, onuHwAddress, offeredIp, pbit, stream); err != nil { |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 415 | dhcpLogger.WithFields(log.Fields{ |
| 416 | "OnuId": onuId, |
| 417 | "IntfId": ponPortId, |
| 418 | "OnuSn": serialNumber, |
| 419 | }).Errorf("Can't send DHCP Request: %s", err) |
| 420 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 421 | return err |
| 422 | } |
| 423 | return err |
| 424 | } |
| 425 | if err := onuStateMachine.Event("dhcp_request_sent"); err != nil { |
| 426 | dhcpLogger.WithFields(log.Fields{ |
| 427 | "OnuId": onuId, |
| 428 | "IntfId": ponPortId, |
| 429 | "OnuSn": serialNumber, |
| 430 | }).Errorf("Error while transitioning ONU State %v", err) |
| 431 | } |
| 432 | |
| 433 | } else if dhcpMessageType == layers.DHCPMsgTypeAck { |
| 434 | // NOTE once the ack is received we don't need to do anything but change the state |
| 435 | if err := onuStateMachine.Event("dhcp_ack_received"); err != nil { |
| 436 | dhcpLogger.WithFields(log.Fields{ |
| 437 | "OnuId": onuId, |
| 438 | "IntfId": ponPortId, |
| 439 | "OnuSn": serialNumber, |
| 440 | }).Errorf("Error while transitioning ONU State %v", err) |
| 441 | } |
| 442 | dhcpLogger.WithFields(log.Fields{ |
| 443 | "OnuId": onuId, |
| 444 | "IntfId": ponPortId, |
| 445 | "OnuSn": serialNumber, |
| 446 | }).Infof("DHCP State machine completed") |
| 447 | } |
| 448 | // NOTE do we need to care about DHCPMsgTypeRelease?? |
| 449 | } else { |
| 450 | dhcpLogger.WithFields(log.Fields{ |
| 451 | "OnuId": onuId, |
| 452 | "IntfId": ponPortId, |
| 453 | "OnuSn": serialNumber, |
| 454 | }).Warnf("Unsupported DHCP Operation: %s", dhcpLayer.Operation.String()) |
| 455 | } |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 456 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 457 | return nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 458 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 459 | |
| 460 | // This method handle the BBR DHCP Packets |
| 461 | // BBR does not need to do anything but forward the packets in the correct direction |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 462 | func HandleNextBbrPacket(onuId uint32, ponPortId uint32, serialNumber string, doneChannel chan bool, pkt gopacket.Packet, client openolt.OpenoltClient) error { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 463 | |
| 464 | // check if the packet is going: |
| 465 | // - outgouing: toward the DHCP |
| 466 | // - incoming: toward the ONU |
| 467 | isIncoming := packetHandlers.IsIncomingPacket(pkt) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 468 | dhcpLogger.Tracef("Is Incoming: %t", isIncoming) |
| 469 | |
| 470 | pkt, err := packetHandlers.PopSingleTag(pkt) |
| 471 | if err != nil { |
| 472 | dhcpLogger.WithFields(log.Fields{ |
| 473 | "OnuId": onuId, |
| 474 | "IntfId": ponPortId, |
| 475 | "OnuSn": serialNumber, |
| 476 | "error": err, |
| 477 | }).Fatalf("Can't untag packet") |
| 478 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 479 | |
| 480 | dhcpType, err := GetDhcpPacketType(pkt) |
| 481 | if err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 482 | dhcpLogger.WithFields(log.Fields{ |
| 483 | "OnuId": onuId, |
| 484 | "IntfId": ponPortId, |
| 485 | "OnuSn": serialNumber, |
| 486 | "error": err, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 487 | }).Fatalf("Can't find DHCP type for packet") |
| 488 | } |
| 489 | |
| 490 | srcMac, _ := packetHandlers.GetSrcMacAddressFromPacket(pkt) |
| 491 | dstMac, _ := packetHandlers.GetDstMacAddressFromPacket(pkt) |
| 492 | |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 493 | if isIncoming { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 494 | |
| 495 | onuPacket := openolt.OnuPacket{ |
| 496 | IntfId: ponPortId, |
| 497 | OnuId: onuId, |
| 498 | PortNo: onuId, |
| 499 | GemportId: 1, |
| 500 | Pkt: pkt.Data(), |
| 501 | } |
| 502 | |
| 503 | if _, err := client.OnuPacketOut(context.Background(), &onuPacket); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 504 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 505 | "OnuId": onuId, |
| 506 | "IntfId": ponPortId, |
| 507 | "OnuSn": serialNumber, |
| 508 | "Type": dhcpType, |
| 509 | "error": err, |
| 510 | }).Error("Failed to send DHCP packet to the ONU") |
| 511 | } |
| 512 | |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 513 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 514 | "OnuId": onuId, |
| 515 | "IntfId": ponPortId, |
| 516 | "OnuSn": serialNumber, |
| 517 | "Type": dhcpType, |
| 518 | "DstMac": dstMac, |
| 519 | "SrcMac": srcMac, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 520 | }).Infof("Sent DHCP packet to the ONU") |
| 521 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 522 | dhcpLayer, _ := GetDhcpLayer(pkt) |
| 523 | dhcpMessageType, _ := GetDhcpMessageType(dhcpLayer) |
| 524 | if dhcpMessageType == layers.DHCPMsgTypeAck { |
| 525 | doneChannel <- true |
| 526 | } |
| 527 | |
| 528 | } else { |
| 529 | // double tag the packet and send it to the NNI |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 530 | // we don't really care about the tags as they are stripped before |
| 531 | // the packet is sent to the DHCP server |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame^] | 532 | // in BBR we don't care about the pBit |
| 533 | doubleTaggedPkt, err := packetHandlers.PushDoubleTag(900, 900, pkt, 0) |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 534 | if err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 535 | dhcpLogger.WithFields(log.Fields{ |
| 536 | "OnuId": onuId, |
| 537 | "IntfId": ponPortId, |
| 538 | "OnuSn": serialNumber, |
| 539 | "Type": dhcpType, |
| 540 | "error": err, |
| 541 | }).Error("Failed to add double tag to packet") |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | pkt := openolt.UplinkPacket{ |
| 545 | IntfId: 0, // BBSim does not care about which NNI, it has only one |
| 546 | Pkt: doubleTaggedPkt.Data(), |
| 547 | } |
| 548 | if _, err := client.UplinkPacketOut(context.Background(), &pkt); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 549 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 550 | "OnuId": onuId, |
| 551 | "IntfId": ponPortId, |
| 552 | "OnuSn": serialNumber, |
| 553 | "Type": dhcpType, |
| 554 | "error": err, |
| 555 | }).Error("Failed to send DHCP packet out of the NNI Port") |
| 556 | } |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 557 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 558 | "OnuId": onuId, |
| 559 | "IntfId": ponPortId, |
| 560 | "OnuSn": serialNumber, |
| 561 | "Type": dhcpType, |
| 562 | "DstMac": dstMac, |
| 563 | "SrcMac": srcMac, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 564 | }).Infof("Sent DHCP packet out of the NNI Port") |
| 565 | } |
| 566 | return nil |
| 567 | } |