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" |
| 24 | "github.com/google/gopacket" |
| 25 | "github.com/google/gopacket/layers" |
| 26 | "github.com/looplab/fsm" |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 27 | "github.com/opencord/bbsim/internal/bbsim/packetHandlers" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 28 | bbsim "github.com/opencord/bbsim/internal/bbsim/types" |
Matteo Scandolo | 4f4ac79 | 2020-10-01 16:33:21 -0700 | [diff] [blame^] | 29 | "github.com/opencord/voltha-protos/v4/go/openolt" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 30 | log "github.com/sirupsen/logrus" |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 31 | "net" |
| 32 | "reflect" |
| 33 | "strconv" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 34 | ) |
| 35 | |
| 36 | var dhcpLogger = log.WithFields(log.Fields{ |
| 37 | "module": "DHCP", |
| 38 | }) |
| 39 | |
| 40 | var defaultParamsRequestList = []layers.DHCPOpt{ |
| 41 | layers.DHCPOptSubnetMask, |
| 42 | layers.DHCPOptBroadcastAddr, |
| 43 | layers.DHCPOptTimeOffset, |
| 44 | layers.DHCPOptRouter, |
| 45 | layers.DHCPOptDomainName, |
| 46 | layers.DHCPOptDNS, |
| 47 | layers.DHCPOptDomainSearch, |
| 48 | layers.DHCPOptHostname, |
| 49 | layers.DHCPOptNetBIOSTCPNS, |
| 50 | layers.DHCPOptNetBIOSTCPScope, |
| 51 | layers.DHCPOptInterfaceMTU, |
| 52 | layers.DHCPOptClasslessStaticRoute, |
| 53 | layers.DHCPOptNTPServers, |
| 54 | } |
| 55 | |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 56 | func macAddressToTxId(mac net.HardwareAddr) uint32 { |
| 57 | |
| 58 | // NOTE we want to generate a unique XID, |
| 59 | // the easiest way is to transform the macAddress (already unique) into an integer |
| 60 | str := "" |
| 61 | for _, i := range mac { |
| 62 | str = str + fmt.Sprintf("%d", i) |
| 63 | } |
| 64 | xid, err := strconv.Atoi(str) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 65 | if err != nil { |
| 66 | log.Fatal("Can't generate unique XID for ONU") |
| 67 | } |
| 68 | |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 69 | return uint32(xid) |
| 70 | } |
| 71 | |
| 72 | func createDefaultDHCPReq(mac net.HardwareAddr) layers.DHCPv4 { |
| 73 | xid := macAddressToTxId(mac) |
| 74 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 75 | return layers.DHCPv4{ |
| 76 | Operation: layers.DHCPOpRequest, |
| 77 | HardwareType: layers.LinkTypeEthernet, |
| 78 | HardwareLen: 6, |
| 79 | HardwareOpts: 0, |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 80 | Xid: uint32(xid), |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 81 | ClientHWAddr: mac, |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 82 | } |
| 83 | } |
| 84 | |
Matteo Scandolo | bfcfbb3 | 2020-09-28 14:14:39 -0700 | [diff] [blame] | 85 | func createDefaultOpts(gemPortId uint32, intfId uint32, onuId uint32) []layers.DHCPOption { |
| 86 | hostname := []byte(fmt.Sprintf("%d.%d.%d.bbsim.onf.org", gemPortId, intfId, onuId)) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 87 | opts := []layers.DHCPOption{} |
| 88 | opts = append(opts, layers.DHCPOption{ |
| 89 | Type: layers.DHCPOptHostname, |
| 90 | Data: hostname, |
| 91 | Length: uint8(len(hostname)), |
| 92 | }) |
| 93 | |
| 94 | bytes := []byte{} |
| 95 | for _, option := range defaultParamsRequestList { |
| 96 | bytes = append(bytes, byte(option)) |
| 97 | } |
| 98 | |
| 99 | opts = append(opts, layers.DHCPOption{ |
| 100 | Type: layers.DHCPOptParamsRequest, |
| 101 | Data: bytes, |
| 102 | Length: uint8(len(bytes)), |
| 103 | }) |
| 104 | return opts |
| 105 | } |
| 106 | |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 107 | func createDHCPDisc(intfId uint32, onuId uint32, gemPort uint32, macAddress net.HardwareAddr) *layers.DHCPv4 { |
| 108 | dhcpLayer := createDefaultDHCPReq(macAddress) |
Matteo Scandolo | bfcfbb3 | 2020-09-28 14:14:39 -0700 | [diff] [blame] | 109 | defaultOpts := createDefaultOpts(gemPort, intfId, onuId) |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 110 | dhcpLayer.Options = append([]layers.DHCPOption{{ |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 111 | Type: layers.DHCPOptMessageType, |
| 112 | Data: []byte{byte(layers.DHCPMsgTypeDiscover)}, |
| 113 | Length: 1, |
| 114 | }}, defaultOpts...) |
| 115 | |
Matteo Scandolo | bfcfbb3 | 2020-09-28 14:14:39 -0700 | [diff] [blame] | 116 | data := []byte{01} |
| 117 | data = append(data, macAddress...) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 118 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 119 | Type: layers.DHCPOptClientID, |
| 120 | Data: data, |
| 121 | Length: uint8(len(data)), |
| 122 | }) |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 123 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 124 | return &dhcpLayer |
| 125 | } |
| 126 | |
Matteo Scandolo | bfcfbb3 | 2020-09-28 14:14:39 -0700 | [diff] [blame] | 127 | func createDHCPReq(intfId uint32, onuId uint32, macAddress net.HardwareAddr, offeredIp net.IP, gemPortId uint32) *layers.DHCPv4 { |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 128 | dhcpLayer := createDefaultDHCPReq(macAddress) |
Matteo Scandolo | bfcfbb3 | 2020-09-28 14:14:39 -0700 | [diff] [blame] | 129 | defaultOpts := createDefaultOpts(gemPortId, intfId, onuId) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 130 | |
| 131 | dhcpLayer.Options = append(defaultOpts, layers.DHCPOption{ |
| 132 | Type: layers.DHCPOptMessageType, |
| 133 | Data: []byte{byte(layers.DHCPMsgTypeRequest)}, |
| 134 | Length: 1, |
| 135 | }) |
| 136 | |
| 137 | data := []byte{182, 21, 0, 128} |
| 138 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 139 | Type: layers.DHCPOptServerID, |
| 140 | Data: data, |
| 141 | Length: uint8(len(data)), |
| 142 | }) |
| 143 | |
| 144 | data = []byte{0xcd, 0x28, 0xcb, 0xcc, 0x00, 0x01, 0x00, 0x01, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 145 | 0x23, 0xed, 0x11, 0xec, 0x4e, 0xfc, 0xcd, 0x28, byte(intfId), byte(onuId)} |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 146 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 147 | Type: layers.DHCPOptClientID, |
| 148 | Data: data, |
| 149 | Length: uint8(len(data)), |
| 150 | }) |
| 151 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 152 | // 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] | 153 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 154 | Type: layers.DHCPOptRequestIP, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 155 | Data: offeredIp, |
| 156 | Length: uint8(len(offeredIp)), |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 157 | }) |
| 158 | return &dhcpLayer |
| 159 | } |
| 160 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 161 | 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] | 162 | buffer := gopacket.NewSerializeBuffer() |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 163 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 164 | options := gopacket.SerializeOptions{ |
| 165 | ComputeChecksums: true, |
| 166 | FixLengths: true, |
| 167 | } |
| 168 | |
| 169 | ethernetLayer := &layers.Ethernet{ |
| 170 | SrcMAC: srcMac, |
| 171 | DstMAC: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, |
| 172 | EthernetType: layers.EthernetTypeIPv4, |
| 173 | } |
| 174 | |
| 175 | ipLayer := &layers.IPv4{ |
| 176 | Version: 4, |
| 177 | TOS: 0x10, |
| 178 | TTL: 128, |
| 179 | SrcIP: []byte{0, 0, 0, 0}, |
| 180 | DstIP: []byte{255, 255, 255, 255}, |
| 181 | Protocol: layers.IPProtocolUDP, |
| 182 | } |
| 183 | |
| 184 | udpLayer := &layers.UDP{ |
| 185 | SrcPort: 68, |
| 186 | DstPort: 67, |
| 187 | } |
| 188 | |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 189 | _ = udpLayer.SetNetworkLayerForChecksum(ipLayer) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 190 | if err := gopacket.SerializeLayers(buffer, options, ethernetLayer, ipLayer, udpLayer, dhcp); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 191 | dhcpLogger.Error("SerializeLayers") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 192 | return nil, err |
| 193 | } |
| 194 | |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 195 | untaggedPkt := gopacket.NewPacket(buffer.Bytes(), layers.LayerTypeEthernet, gopacket.Default) |
| 196 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 197 | taggedPkt, err := packetHandlers.PushSingleTag(cTag, untaggedPkt, pbit) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 198 | if err != nil { |
| 199 | dhcpLogger.Error("TagPacket") |
| 200 | return nil, err |
| 201 | } |
| 202 | |
| 203 | return gopacket.Payload(taggedPkt.Data()), nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 204 | } |
| 205 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 206 | func GetDhcpLayer(pkt gopacket.Packet) (*layers.DHCPv4, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 207 | layerDHCP := pkt.Layer(layers.LayerTypeDHCPv4) |
| 208 | dhcp, _ := layerDHCP.(*layers.DHCPv4) |
| 209 | if dhcp == nil { |
| 210 | return nil, errors.New("Failed-to-extract-DHCP-layer") |
| 211 | } |
| 212 | return dhcp, nil |
| 213 | } |
| 214 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 215 | func GetDhcpMessageType(dhcp *layers.DHCPv4) (layers.DHCPMsgType, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 216 | for _, option := range dhcp.Options { |
| 217 | if option.Type == layers.DHCPOptMessageType { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 218 | if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeDiscover)}) { |
| 219 | return layers.DHCPMsgTypeDiscover, nil |
| 220 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeOffer)}) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 221 | return layers.DHCPMsgTypeOffer, nil |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 222 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeRequest)}) { |
| 223 | return layers.DHCPMsgTypeRequest, nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 224 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeAck)}) { |
| 225 | return layers.DHCPMsgTypeAck, nil |
| 226 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeRelease)}) { |
| 227 | return layers.DHCPMsgTypeRelease, nil |
| 228 | } else { |
| 229 | msg := fmt.Sprintf("This type %x is not supported", option.Data) |
| 230 | return 0, errors.New(msg) |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | return 0, errors.New("Failed to extract MsgType from dhcp") |
| 235 | } |
| 236 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 237 | // returns the DHCP Layer type or error if it's not a DHCP Packet |
| 238 | func GetDhcpPacketType(pkt gopacket.Packet) (string, error) { |
| 239 | dhcpLayer, err := GetDhcpLayer(pkt) |
| 240 | if err != nil { |
| 241 | return "", err |
| 242 | } |
| 243 | dhcpMessageType, err := GetDhcpMessageType(dhcpLayer) |
| 244 | if err != nil { |
| 245 | return "", err |
| 246 | } |
| 247 | |
| 248 | return dhcpMessageType.String(), nil |
| 249 | } |
| 250 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 251 | 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] | 252 | |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 253 | dhcpLogger.WithFields(log.Fields{ |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 254 | "OnuId": msg.OnuId, |
| 255 | "IntfId": msg.IntfId, |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 256 | "GemPort": gemPortId, |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 257 | "Type": "DHCP", |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 258 | "Pkt": hex.EncodeToString(msg.Bytes), |
| 259 | }).Trace("Sending DHCP packet in") |
Matteo Scandolo | eb6b5af | 2020-06-24 16:23:58 -0700 | [diff] [blame] | 260 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 261 | data := &openolt.Indication_PktInd{PktInd: &openolt.PacketIndication{ |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 262 | IntfType: "pon", |
| 263 | IntfId: msg.IntfId, |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 264 | GemportId: gemPortId, |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 265 | Pkt: msg.Bytes, |
| 266 | PortNo: portNo, |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 267 | }} |
| 268 | |
| 269 | if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
| 270 | dhcpLogger.Errorf("Fail to send DHCP PktInd indication. %v", err) |
| 271 | return err |
| 272 | } |
| 273 | return nil |
| 274 | } |
| 275 | |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 276 | func sendDHCPRequest(ponPortId uint32, onuId uint32, serviceName string, serialNumber string, portNo uint32, |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 277 | cTag int, gemPortId uint32, onuStateMachine *fsm.FSM, onuHwAddress net.HardwareAddr, |
| 278 | offeredIp net.IP, pbit uint8, stream bbsim.Stream) error { |
Matteo Scandolo | bfcfbb3 | 2020-09-28 14:14:39 -0700 | [diff] [blame] | 279 | dhcp := createDHCPReq(ponPortId, onuId, onuHwAddress, offeredIp, gemPortId) |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 280 | pkt, err := serializeDHCPPacket(ponPortId, onuId, cTag, onuHwAddress, dhcp, pbit) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 281 | |
| 282 | if err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 283 | dhcpLogger.WithFields(log.Fields{ |
| 284 | "OnuId": onuId, |
| 285 | "IntfId": ponPortId, |
| 286 | "OnuSn": serialNumber, |
| 287 | "OfferedIp": offeredIp.String(), |
| 288 | }).Errorf("Cannot serializeDHCPPacket: %s", err) |
| 289 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 290 | return err |
| 291 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 292 | return err |
| 293 | } |
| 294 | // NOTE I don't think we need to tag the packet |
| 295 | //taggedPkt, err := packetHandlers.PushSingleTag(cTag, pkt) |
| 296 | |
| 297 | msg := bbsim.ByteMsg{ |
| 298 | IntfId: ponPortId, |
| 299 | OnuId: onuId, |
| 300 | Bytes: pkt, |
| 301 | } |
| 302 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 303 | if err := sendDHCPPktIn(msg, portNo, gemPortId, stream); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 304 | dhcpLogger.WithFields(log.Fields{ |
| 305 | "OnuId": onuId, |
| 306 | "IntfId": ponPortId, |
| 307 | "OnuSn": serialNumber, |
| 308 | }).Errorf("Cannot sendDHCPPktIn: %s", err) |
| 309 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 310 | return err |
| 311 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 312 | return err |
| 313 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 314 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 315 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 316 | "OnuId": onuId, |
| 317 | "IntfId": ponPortId, |
| 318 | "OnuSn": serialNumber, |
| 319 | "OfferedIp": offeredIp.String(), |
| 320 | "ServiceName": serviceName, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 321 | }).Infof("DHCPRequest Sent") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 322 | return nil |
| 323 | } |
| 324 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 325 | func updateDhcpFailed(onuId uint32, ponPortId uint32, serialNumber string, onuStateMachine *fsm.FSM) error { |
| 326 | if err := onuStateMachine.Event("dhcp_failed"); err != nil { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 327 | dhcpLogger.WithFields(log.Fields{ |
| 328 | "OnuId": onuId, |
| 329 | "IntfId": ponPortId, |
| 330 | "OnuSn": serialNumber, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 331 | }).Errorf("Error while transitioning ONU State %v", err) |
| 332 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 333 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 334 | return nil |
| 335 | } |
| 336 | |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 337 | func SendDHCPDiscovery(ponPortId uint32, onuId uint32, serviceName string, cTag int, gemPortId uint32, |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 338 | serialNumber string, portNo uint32, stateMachine *fsm.FSM, onuHwAddress net.HardwareAddr, |
| 339 | pbit uint8, stream bbsim.Stream) error { |
| 340 | |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 341 | dhcp := createDHCPDisc(ponPortId, onuId, gemPortId, onuHwAddress) |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 342 | pkt, err := serializeDHCPPacket(ponPortId, onuId, cTag, onuHwAddress, dhcp, pbit) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 343 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 344 | if err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 345 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 346 | "OnuId": onuId, |
| 347 | "IntfId": ponPortId, |
| 348 | "OnuSn": serialNumber, |
| 349 | "ServiceName": serviceName, |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 350 | }).Errorf("Cannot serializeDHCPPacket: %s", err) |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 351 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, stateMachine); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 352 | return err |
| 353 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 354 | return err |
| 355 | } |
| 356 | // NOTE I don't think we need to tag the packet |
| 357 | //taggedPkt, err := packetHandlers.PushSingleTag(cTag, pkt) |
| 358 | |
| 359 | msg := bbsim.ByteMsg{ |
| 360 | IntfId: ponPortId, |
| 361 | OnuId: onuId, |
| 362 | Bytes: pkt, |
| 363 | } |
| 364 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 365 | if err := sendDHCPPktIn(msg, portNo, gemPortId, stream); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 366 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 367 | "OnuId": onuId, |
| 368 | "IntfId": ponPortId, |
| 369 | "OnuSn": serialNumber, |
| 370 | "ServiceName": serviceName, |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 371 | }).Errorf("Cannot sendDHCPPktIn: %s", err) |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 372 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, stateMachine); err != nil { |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 373 | return err |
| 374 | } |
| 375 | return err |
| 376 | } |
| 377 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 378 | "OnuId": onuId, |
| 379 | "IntfId": ponPortId, |
| 380 | "OnuSn": serialNumber, |
| 381 | "ServiceName": serviceName, |
| 382 | }).Info("DHCPDiscovery Sent") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 383 | |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 384 | if err := stateMachine.Event("dhcp_discovery_sent"); err != nil { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 385 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 386 | "OnuId": onuId, |
| 387 | "IntfId": ponPortId, |
| 388 | "OnuSn": serialNumber, |
| 389 | "ServiceName": serviceName, |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 390 | }).Errorf("Error while transitioning ONU State %v", err) |
Matteo Scandolo | adc72a8 | 2020-09-08 18:46:08 -0700 | [diff] [blame] | 391 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 392 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 393 | return nil |
| 394 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 395 | |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 396 | func HandleNextPacket(onuId uint32, ponPortId uint32, serviceName string, serialNumber string, portNo uint32, |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 397 | cTag int, gemPortId uint32, onuHwAddress net.HardwareAddr, onuStateMachine *fsm.FSM, |
| 398 | pkt gopacket.Packet, pbit uint8, stream bbsim.Stream) error { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 399 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 400 | dhcpLayer, err := GetDhcpLayer(pkt) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 401 | if err != nil { |
| 402 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 403 | "OnuId": onuId, |
| 404 | "IntfId": ponPortId, |
| 405 | "OnuSn": serialNumber, |
| 406 | "ServiceName": serviceName, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 407 | }).Errorf("Can't get DHCP Layer from Packet: %v", err) |
| 408 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 409 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 410 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 411 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 412 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 413 | dhcpMessageType, err := GetDhcpMessageType(dhcpLayer) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 414 | if err != nil { |
| 415 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 416 | "OnuId": onuId, |
| 417 | "IntfId": ponPortId, |
| 418 | "OnuSn": serialNumber, |
| 419 | "ServiceName": serviceName, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 420 | }).Errorf("Can't get DHCP Message Type from DHCP Layer: %v", err) |
| 421 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 422 | return err |
| 423 | } |
| 424 | return err |
| 425 | } |
| 426 | |
| 427 | if dhcpLayer.Operation == layers.DHCPOpReply { |
| 428 | if dhcpMessageType == layers.DHCPMsgTypeOffer { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 429 | offeredIp := dhcpLayer.YourClientIP |
Matteo Scandolo | 24a88c4 | 2020-09-17 14:55:28 -0700 | [diff] [blame] | 430 | if err := sendDHCPRequest(ponPortId, onuId, serviceName, serialNumber, portNo, cTag, gemPortId, onuStateMachine, onuHwAddress, offeredIp, pbit, stream); err != nil { |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 431 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 432 | "OnuId": onuId, |
| 433 | "IntfId": ponPortId, |
| 434 | "OnuSn": serialNumber, |
| 435 | "ServiceName": serviceName, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 436 | }).Errorf("Can't send DHCP Request: %s", err) |
| 437 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 438 | return err |
| 439 | } |
| 440 | return err |
| 441 | } |
| 442 | if err := onuStateMachine.Event("dhcp_request_sent"); err != nil { |
| 443 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 444 | "OnuId": onuId, |
| 445 | "IntfId": ponPortId, |
| 446 | "OnuSn": serialNumber, |
| 447 | "ServiceName": serviceName, |
| 448 | }).Errorf("Error while transitioning State %v", err) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | } else if dhcpMessageType == layers.DHCPMsgTypeAck { |
| 452 | // NOTE once the ack is received we don't need to do anything but change the state |
| 453 | if err := onuStateMachine.Event("dhcp_ack_received"); err != nil { |
| 454 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 455 | "OnuId": onuId, |
| 456 | "IntfId": ponPortId, |
| 457 | "OnuSn": serialNumber, |
| 458 | "ServiceName": serviceName, |
| 459 | }).Errorf("Error while transitioning State %v", err) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 460 | } |
| 461 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 462 | "OnuId": onuId, |
| 463 | "IntfId": ponPortId, |
| 464 | "OnuSn": serialNumber, |
| 465 | "ServiceName": serviceName, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 466 | }).Infof("DHCP State machine completed") |
| 467 | } |
| 468 | // NOTE do we need to care about DHCPMsgTypeRelease?? |
| 469 | } else { |
| 470 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 7f656fb | 2020-09-08 15:18:15 -0700 | [diff] [blame] | 471 | "OnuId": onuId, |
| 472 | "IntfId": ponPortId, |
| 473 | "OnuSn": serialNumber, |
| 474 | "ServiceName": serviceName, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 475 | }).Warnf("Unsupported DHCP Operation: %s", dhcpLayer.Operation.String()) |
| 476 | } |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 477 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 478 | return nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 479 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 480 | |
| 481 | // This method handle the BBR DHCP Packets |
| 482 | // 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] | 483 | 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] | 484 | |
| 485 | // check if the packet is going: |
| 486 | // - outgouing: toward the DHCP |
| 487 | // - incoming: toward the ONU |
| 488 | isIncoming := packetHandlers.IsIncomingPacket(pkt) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 489 | dhcpLogger.Tracef("Is Incoming: %t", isIncoming) |
| 490 | |
| 491 | pkt, err := packetHandlers.PopSingleTag(pkt) |
| 492 | if err != nil { |
| 493 | dhcpLogger.WithFields(log.Fields{ |
| 494 | "OnuId": onuId, |
| 495 | "IntfId": ponPortId, |
| 496 | "OnuSn": serialNumber, |
| 497 | "error": err, |
| 498 | }).Fatalf("Can't untag packet") |
| 499 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 500 | |
| 501 | dhcpType, err := GetDhcpPacketType(pkt) |
| 502 | if err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 503 | dhcpLogger.WithFields(log.Fields{ |
| 504 | "OnuId": onuId, |
| 505 | "IntfId": ponPortId, |
| 506 | "OnuSn": serialNumber, |
| 507 | "error": err, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 508 | }).Fatalf("Can't find DHCP type for packet") |
| 509 | } |
| 510 | |
| 511 | srcMac, _ := packetHandlers.GetSrcMacAddressFromPacket(pkt) |
| 512 | dstMac, _ := packetHandlers.GetDstMacAddressFromPacket(pkt) |
| 513 | |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame] | 514 | if isIncoming { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 515 | |
| 516 | onuPacket := openolt.OnuPacket{ |
| 517 | IntfId: ponPortId, |
| 518 | OnuId: onuId, |
| 519 | PortNo: onuId, |
| 520 | GemportId: 1, |
| 521 | Pkt: pkt.Data(), |
| 522 | } |
| 523 | |
| 524 | if _, err := client.OnuPacketOut(context.Background(), &onuPacket); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 525 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 526 | "OnuId": onuId, |
| 527 | "IntfId": ponPortId, |
| 528 | "OnuSn": serialNumber, |
| 529 | "Type": dhcpType, |
| 530 | "error": err, |
| 531 | }).Error("Failed to send DHCP packet to the ONU") |
| 532 | } |
| 533 | |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 534 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 535 | "OnuId": onuId, |
| 536 | "IntfId": ponPortId, |
| 537 | "OnuSn": serialNumber, |
| 538 | "Type": dhcpType, |
| 539 | "DstMac": dstMac, |
| 540 | "SrcMac": srcMac, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 541 | }).Infof("Sent DHCP packet to the ONU") |
| 542 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 543 | dhcpLayer, _ := GetDhcpLayer(pkt) |
| 544 | dhcpMessageType, _ := GetDhcpMessageType(dhcpLayer) |
| 545 | if dhcpMessageType == layers.DHCPMsgTypeAck { |
| 546 | doneChannel <- true |
| 547 | } |
| 548 | |
| 549 | } else { |
| 550 | // double tag the packet and send it to the NNI |
Matteo Scandolo | 4a03626 | 2020-08-17 15:56:13 -0700 | [diff] [blame] | 551 | // we don't really care about the tags as they are stripped before |
| 552 | // the packet is sent to the DHCP server |
Matteo Scandolo | 8d28137 | 2020-09-03 16:23:37 -0700 | [diff] [blame] | 553 | // in BBR we don't care about the pBit |
| 554 | doubleTaggedPkt, err := packetHandlers.PushDoubleTag(900, 900, pkt, 0) |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 555 | if err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 556 | dhcpLogger.WithFields(log.Fields{ |
| 557 | "OnuId": onuId, |
| 558 | "IntfId": ponPortId, |
| 559 | "OnuSn": serialNumber, |
| 560 | "Type": dhcpType, |
| 561 | "error": err, |
| 562 | }).Error("Failed to add double tag to packet") |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 563 | } |
| 564 | |
| 565 | pkt := openolt.UplinkPacket{ |
| 566 | IntfId: 0, // BBSim does not care about which NNI, it has only one |
| 567 | Pkt: doubleTaggedPkt.Data(), |
| 568 | } |
| 569 | if _, err := client.UplinkPacketOut(context.Background(), &pkt); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 570 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 571 | "OnuId": onuId, |
| 572 | "IntfId": ponPortId, |
| 573 | "OnuSn": serialNumber, |
| 574 | "Type": dhcpType, |
| 575 | "error": err, |
| 576 | }).Error("Failed to send DHCP packet out of the NNI Port") |
| 577 | } |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 578 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 579 | "OnuId": onuId, |
| 580 | "IntfId": ponPortId, |
| 581 | "OnuSn": serialNumber, |
| 582 | "Type": dhcpType, |
| 583 | "DstMac": dstMac, |
| 584 | "SrcMac": srcMac, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 585 | }).Infof("Sent DHCP packet out of the NNI Port") |
| 586 | } |
| 587 | return nil |
| 588 | } |