Takahiro Suzuki | d7bf820 | 2020-12-17 20:21:59 +0900 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2020-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 l2oam |
| 18 | |
| 19 | import ( |
| 20 | "encoding/binary" |
| 21 | "encoding/hex" |
| 22 | "fmt" |
| 23 | |
| 24 | "github.com/google/gopacket" |
| 25 | "github.com/google/gopacket/layers" |
| 26 | ) |
| 27 | |
| 28 | // GenerateDiscoverySOLICIT generates "Discovery: SOLICIT" message |
| 29 | func GenerateDiscoverySOLICIT() gopacket.SerializableLayer { |
| 30 | |
| 31 | tibitData := &DiscoverySolicit{ |
| 32 | // IEEE 1904.2 |
| 33 | Opcode: 0xfd, |
| 34 | DiscoveryType: 0x01, |
| 35 | // Vendor-specific |
| 36 | VendorType: 0xfe, |
| 37 | Length: 37, |
| 38 | // Vendor ID |
| 39 | VendorIDType: 0xfd, |
| 40 | VendorIDLength: 3, |
| 41 | VendorID: []byte{0x2a, 0xea, 0x15}, |
| 42 | // Controller Priority |
| 43 | CPType: 0x05, |
| 44 | CPLength: 1, |
| 45 | CPValue: []byte{128}, |
| 46 | //NetworkID |
| 47 | NWType: 0x06, |
| 48 | NWLength: 16, |
| 49 | NWValue: []byte("tibitcom.com"), |
| 50 | //Device Type |
| 51 | DVType: 0x07, |
| 52 | DVLength: 1, |
| 53 | DVValue: []byte{1}, |
| 54 | //Supported CLient Protocols |
| 55 | SCPType: 0x08, |
| 56 | SCPLength: 1, |
| 57 | SCPValue: []byte{0x03}, |
| 58 | //Padding |
| 59 | PadType: 0xff, |
| 60 | PadLength: 1, |
| 61 | PadValue: []byte{0}, |
| 62 | } |
| 63 | |
| 64 | return tibitData |
| 65 | } |
| 66 | |
| 67 | // DiscoverySolicit is a structure for Discovery message |
| 68 | type DiscoverySolicit struct { |
| 69 | layers.BaseLayer |
| 70 | Opcode uint8 |
| 71 | DiscoveryType uint8 |
| 72 | VendorType uint8 |
| 73 | Length uint16 // length of after this data without Padding |
| 74 | VendorIDType uint8 |
| 75 | VendorIDLength uint16 |
| 76 | VendorID []byte |
| 77 | CPType uint8 |
| 78 | CPLength uint16 |
| 79 | CPValue []byte |
| 80 | NWType uint8 |
| 81 | NWLength uint16 |
| 82 | NWValue []byte |
| 83 | DVType uint8 |
| 84 | DVLength uint16 |
| 85 | DVValue []byte |
| 86 | SCPType uint8 |
| 87 | SCPLength uint16 |
| 88 | SCPValue []byte |
| 89 | PadType uint8 |
| 90 | PadLength uint16 |
| 91 | PadValue []byte |
| 92 | } |
| 93 | |
| 94 | // String returns the string expression of DiscoverySolicit |
| 95 | func (d *DiscoverySolicit) String() string { |
| 96 | message := fmt.Sprintf("Opcode:%v, DiscoveryType:%v, VendorType:%v, Length:%v", d.Opcode, d.DiscoveryType, d.VendorType, d.Length) |
| 97 | message = fmt.Sprintf("%s, VendorIDType:%v, VendorIDLength:%v, VendorID:%v", message, d.VendorIDType, d.VendorIDLength, hex.EncodeToString(d.VendorID)) |
| 98 | message = fmt.Sprintf("%s, CPType:%v, CPLength:%v, CPValue:%v", message, d.CPType, d.CPLength, hex.EncodeToString(d.CPValue)) |
| 99 | message = fmt.Sprintf("%s, NWType:%v, NWLength:%v, NWValue:%v", message, d.NWType, d.NWLength, hex.EncodeToString(d.NWValue)) |
| 100 | message = fmt.Sprintf("%s, DVType:%v, DVLength:%v, DVValue:%v", message, d.DVType, d.DVLength, hex.EncodeToString(d.DVValue)) |
| 101 | message = fmt.Sprintf("%s, SCPType:%v, SCPLength:%v, SCPValue:%v", message, d.SCPType, d.SCPLength, hex.EncodeToString(d.SCPValue)) |
| 102 | return message |
| 103 | } |
| 104 | |
| 105 | // Len returns the length of DiscoverySolicit |
| 106 | func (d *DiscoverySolicit) Len() int { |
| 107 | len := (2) + (3) + int(d.Length) + (int(d.PadLength) + 3) |
| 108 | return len |
| 109 | } |
| 110 | |
| 111 | // LayerType returns the ethernet type of DiscoverySolicit |
| 112 | func (d *DiscoverySolicit) LayerType() gopacket.LayerType { return layers.LayerTypeEthernet } |
| 113 | |
| 114 | // SerializeTo serializes a data structure to byte arrays |
| 115 | func (d *DiscoverySolicit) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { |
| 116 | plen := int(d.Len()) |
| 117 | data, err := b.PrependBytes(plen) |
| 118 | if err != nil { |
| 119 | return err |
| 120 | } |
| 121 | |
| 122 | i := 0 |
| 123 | data[i] = byte(d.Opcode) |
| 124 | i++ |
| 125 | data[i] = byte(d.DiscoveryType) |
| 126 | i++ |
| 127 | data[i] = byte(d.VendorType) |
| 128 | i++ |
| 129 | binary.BigEndian.PutUint16(data[i:i+2], d.Length) |
| 130 | i = i + 2 |
| 131 | |
| 132 | data[i] = byte(d.VendorIDType) |
| 133 | i++ |
| 134 | binary.BigEndian.PutUint16(data[i:i+2], d.VendorIDLength) |
| 135 | i = i + 2 |
| 136 | copy(data[i:i+int(d.VendorIDLength)], d.VendorID) |
| 137 | i = i + int(d.VendorIDLength) |
| 138 | |
| 139 | data[i] = byte(d.CPType) |
| 140 | i++ |
| 141 | binary.BigEndian.PutUint16(data[i:i+2], d.CPLength) |
| 142 | i = i + 2 |
| 143 | copy(data[i:i+int(d.CPLength)], d.CPValue) |
| 144 | i = i + int(d.CPLength) |
| 145 | |
| 146 | data[i] = byte(d.NWType) |
| 147 | i++ |
| 148 | binary.BigEndian.PutUint16(data[i:i+2], d.NWLength) |
| 149 | i = i + 2 |
| 150 | copy(data[i:i+int(d.NWLength)], d.NWValue) |
| 151 | i = i + int(d.NWLength) |
| 152 | |
| 153 | data[i] = byte(d.DVType) |
| 154 | i++ |
| 155 | binary.BigEndian.PutUint16(data[i:i+2], d.DVLength) |
| 156 | i = i + 2 |
| 157 | copy(data[i:i+int(d.DVLength)], d.DVValue) |
| 158 | i = i + int(d.DVLength) |
| 159 | |
| 160 | data[i] = byte(d.SCPType) |
| 161 | i++ |
| 162 | binary.BigEndian.PutUint16(data[i:i+2], d.SCPLength) |
| 163 | i = i + 2 |
| 164 | copy(data[i:i+int(d.SCPLength)], d.SCPValue) |
| 165 | i = i + int(d.SCPLength) |
| 166 | |
| 167 | data[i] = byte(d.PadType) |
| 168 | i++ |
| 169 | binary.BigEndian.PutUint16(data[i:i+2], d.PadLength) |
| 170 | i = i + 2 |
| 171 | copy(data[i:i+int(d.PadLength)], d.PadValue) |
| 172 | |
| 173 | return nil |
| 174 | } |
| 175 | |
| 176 | // Decode decodes byte arrays to a data structure |
| 177 | func (d *DiscoverySolicit) Decode(data []byte) error { |
| 178 | i := 0 |
| 179 | d.Opcode = data[i] |
| 180 | i++ |
| 181 | d.DiscoveryType = data[i] |
| 182 | i++ |
| 183 | d.VendorType = data[i] |
| 184 | i++ |
| 185 | d.Length = binary.BigEndian.Uint16(data[i : i+2]) |
| 186 | i = i + 2 |
| 187 | |
| 188 | d.VendorIDType = data[i] |
| 189 | i++ |
| 190 | d.VendorIDLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 191 | i = i + 2 |
| 192 | d.VendorID = data[i : i+int(d.VendorIDLength)] |
| 193 | i = i + int(d.VendorIDLength) |
| 194 | |
| 195 | d.CPType = data[i] |
| 196 | i++ |
| 197 | d.CPLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 198 | i = i + 2 |
| 199 | d.CPValue = data[i : i+int(d.CPLength)] |
| 200 | i = i + int(d.CPLength) |
| 201 | |
| 202 | d.NWType = data[i] |
| 203 | i++ |
| 204 | d.NWLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 205 | i = i + 2 |
| 206 | d.NWValue = data[i : i+int(d.NWLength)] |
| 207 | i = i + int(d.NWLength) |
| 208 | |
| 209 | d.DVType = data[i] |
| 210 | i++ |
| 211 | d.DVLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 212 | i = i + 2 |
| 213 | d.DVValue = data[i : i+int(d.DVLength)] |
| 214 | i = i + int(d.DVLength) |
| 215 | |
| 216 | d.SCPType = data[i] |
| 217 | i++ |
| 218 | d.SCPLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 219 | i = i + 2 |
| 220 | d.SCPValue = data[i : i+int(d.SCPLength)] |
| 221 | i = i + int(d.SCPLength) |
| 222 | |
| 223 | d.PadType = data[i] |
| 224 | i++ |
| 225 | d.PadLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 226 | i = i + 2 |
| 227 | d.PadValue = data[i : i+int(d.PadLength)] |
| 228 | |
| 229 | return nil |
| 230 | } |
| 231 | |
| 232 | // DiscoveryHello is a structure for Discovery message |
| 233 | type DiscoveryHello struct { |
| 234 | layers.BaseLayer |
| 235 | Opcode uint8 |
| 236 | DiscoveryType uint8 |
| 237 | VendorType uint8 |
| 238 | Length uint16 // length of after this data without Padding |
| 239 | VendorIDType uint8 |
| 240 | VendorIDLength uint16 |
| 241 | VendorID []byte |
| 242 | NWType uint8 |
| 243 | NWLength uint16 |
| 244 | NWValue []byte |
| 245 | DVType uint8 |
| 246 | DVLength uint16 |
| 247 | DVValue []byte |
| 248 | SCPType uint8 |
| 249 | SCPLength uint16 |
| 250 | SCPValue []byte |
| 251 | TunnelType uint8 |
| 252 | TunnelLength uint16 |
| 253 | TunnelValue []byte |
| 254 | PadType uint8 |
| 255 | PadLength uint16 |
| 256 | PadValue []byte |
| 257 | } |
| 258 | |
| 259 | // String returns the string expression of DiscoveryHello |
| 260 | func (d *DiscoveryHello) String() string { |
| 261 | message := fmt.Sprintf("Opcode:%v, DiscoveryType:%v, VendorType:%v, Length:%v", d.Opcode, d.DiscoveryType, d.VendorType, d.Length) |
| 262 | message = fmt.Sprintf("%s, VendorIDType:%v, VendorIDLength:%v, VendorID:%v", message, d.VendorIDType, d.VendorIDLength, hex.EncodeToString(d.VendorID)) |
| 263 | message = fmt.Sprintf("%s, NWType:%v, NWLength:%v, NWValue:%v", message, d.NWType, d.NWLength, hex.EncodeToString(d.NWValue)) |
| 264 | message = fmt.Sprintf("%s, DVType:%v, DVLength:%v, DVValue:%v", message, d.DVType, d.DVLength, hex.EncodeToString(d.DVValue)) |
| 265 | message = fmt.Sprintf("%s, SCPType:%v, SCPLength:%v, SCPValue:%v", message, d.SCPType, d.SCPLength, hex.EncodeToString(d.SCPValue)) |
| 266 | message = fmt.Sprintf("%s, TunnelType:%v, TunnelLength:%v, TunnelValue:%v", message, d.TunnelType, d.TunnelLength, hex.EncodeToString(d.TunnelValue)) |
| 267 | message = fmt.Sprintf("%s, PadType:%v, PadLength:%v, PadValue:%v", message, d.PadType, d.PadLength, hex.EncodeToString(d.PadValue)) |
| 268 | return message |
| 269 | } |
| 270 | |
| 271 | // Len returns the length of DiscoveryHello |
| 272 | func (d *DiscoveryHello) Len() int { |
| 273 | len := (2) + (3) + int(d.Length) + (int(d.PadLength) + 3) |
| 274 | return len |
| 275 | } |
| 276 | |
| 277 | // LayerType returns the ethernet type of DiscoveryHello |
| 278 | func (d *DiscoveryHello) LayerType() gopacket.LayerType { return layers.LayerTypeEthernet } |
| 279 | |
| 280 | // SerializeTo serializes a data structure to byte arrays |
| 281 | func (d *DiscoveryHello) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { |
| 282 | plen := int(d.Len()) |
| 283 | data, err := b.PrependBytes(plen) |
| 284 | if err != nil { |
| 285 | return err |
| 286 | } |
| 287 | |
| 288 | i := 0 |
| 289 | data[i] = byte(d.Opcode) |
| 290 | i++ |
| 291 | data[i] = byte(d.DiscoveryType) |
| 292 | i++ |
| 293 | data[i] = byte(d.VendorType) |
| 294 | i++ |
| 295 | binary.BigEndian.PutUint16(data[i:i+2], d.Length) |
| 296 | i = i + 2 |
| 297 | |
| 298 | data[i] = byte(d.VendorIDType) |
| 299 | i++ |
| 300 | binary.BigEndian.PutUint16(data[i:i+2], d.VendorIDLength) |
| 301 | i = i + 2 |
| 302 | copy(data[i:i+int(d.VendorIDLength)], d.VendorID) |
| 303 | i = i + int(d.VendorIDLength) |
| 304 | |
| 305 | data[i] = byte(d.NWType) |
| 306 | i++ |
| 307 | binary.BigEndian.PutUint16(data[i:i+2], d.NWLength) |
| 308 | i = i + 2 |
| 309 | copy(data[i:i+int(d.NWLength)], d.NWValue) |
| 310 | i = i + int(d.NWLength) |
| 311 | |
| 312 | data[i] = byte(d.DVType) |
| 313 | i++ |
| 314 | binary.BigEndian.PutUint16(data[i:i+2], d.DVLength) |
| 315 | i = i + 2 |
| 316 | copy(data[i:i+int(d.DVLength)], d.DVValue) |
| 317 | i = i + int(d.DVLength) |
| 318 | |
| 319 | data[i] = byte(d.SCPType) |
| 320 | i++ |
| 321 | binary.BigEndian.PutUint16(data[i:i+2], d.SCPLength) |
| 322 | i = i + 2 |
| 323 | copy(data[i:i+int(d.SCPLength)], d.SCPValue) |
| 324 | i = i + int(d.SCPLength) |
| 325 | |
| 326 | data[i] = byte(d.TunnelType) |
| 327 | i++ |
| 328 | binary.BigEndian.PutUint16(data[i:i+2], d.TunnelLength) |
| 329 | i = i + 2 |
| 330 | copy(data[i:i+int(d.TunnelLength)], d.TunnelValue) |
| 331 | i = i + int(d.TunnelLength) |
| 332 | |
| 333 | data[i] = byte(d.PadType) |
| 334 | i++ |
| 335 | binary.BigEndian.PutUint16(data[i:i+2], d.PadLength) |
| 336 | i = i + 2 |
| 337 | copy(data[i:i+int(d.PadLength)], d.PadValue) |
| 338 | |
| 339 | return nil |
| 340 | } |
| 341 | |
| 342 | // Decode decodes byte arrays to a data structure |
| 343 | func (d *DiscoveryHello) Decode(data []byte) error { |
| 344 | i := 0 |
| 345 | d.Opcode = data[i] |
| 346 | i++ |
| 347 | d.DiscoveryType = data[i] |
| 348 | i++ |
| 349 | d.VendorType = data[i] |
| 350 | i++ |
| 351 | d.Length = binary.BigEndian.Uint16(data[i : i+2]) |
| 352 | i = i + 2 |
| 353 | |
| 354 | d.VendorIDType = data[i] |
| 355 | i++ |
| 356 | d.VendorIDLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 357 | i = i + 2 |
| 358 | d.VendorID = data[i : i+int(d.VendorIDLength)] |
| 359 | i = i + int(d.VendorIDLength) |
| 360 | |
| 361 | d.NWType = data[i] |
| 362 | i++ |
| 363 | d.NWLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 364 | i = i + 2 |
| 365 | d.NWValue = data[i : i+int(d.NWLength)] |
| 366 | i = i + int(d.NWLength) |
| 367 | |
| 368 | d.DVType = data[i] |
| 369 | i++ |
| 370 | d.DVLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 371 | i = i + 2 |
| 372 | d.DVValue = data[i : i+int(d.DVLength)] |
| 373 | i = i + int(d.DVLength) |
| 374 | |
| 375 | d.SCPType = data[i] |
| 376 | i++ |
| 377 | d.SCPLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 378 | i = i + 2 |
| 379 | d.SCPValue = data[i : i+int(d.SCPLength)] |
| 380 | i = i + int(d.SCPLength) |
| 381 | |
| 382 | d.TunnelType = data[i] |
| 383 | i++ |
| 384 | d.TunnelLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 385 | i = i + 2 |
| 386 | d.TunnelValue = data[i : i+int(d.TunnelLength)] |
| 387 | i = i + int(d.TunnelLength) |
| 388 | |
| 389 | d.PadType = data[i] |
| 390 | i++ |
| 391 | d.PadLength = binary.BigEndian.Uint16(data[i : i+2]) |
| 392 | i = i + 2 |
| 393 | d.PadValue = data[i : i+int(d.PadLength)] |
| 394 | |
| 395 | return nil |
| 396 | } |