| Naveen Sampath | 04696f7 | 2022-06-13 15:19:14 +0530 | [diff] [blame] | 1 | // Copyright 2014 Google, Inc. All rights reserved. |
| 2 | // |
| 3 | // Use of this source code is governed by a BSD-style license |
| 4 | // that can be found in the LICENSE file in the root of the source |
| 5 | // tree. |
| 6 | |
| 7 | /* |
| 8 | This layer decodes SFlow version 5 datagrams. |
| 9 | |
| 10 | The specification can be found here: http://sflow.org/sflow_version_5.txt |
| 11 | |
| 12 | Additional developer information about sflow can be found at: |
| 13 | http://sflow.org/developers/specifications.php |
| 14 | |
| 15 | And SFlow in general: |
| 16 | http://sflow.org/index.php |
| 17 | |
| 18 | Two forms of sample data are defined: compact and expanded. The |
| 19 | Specification has this to say: |
| 20 | |
| 21 | Compact and expand forms of counter and flow samples are defined. |
| 22 | An agent must not mix compact/expanded encodings. If an agent |
| 23 | will never use ifIndex numbers >= 2^24 then it must use compact |
| 24 | encodings for all interfaces. Otherwise the expanded formats must |
| 25 | be used for all interfaces. |
| 26 | |
| 27 | This decoder only supports the compact form, because that is the only |
| 28 | one for which data was available. |
| 29 | |
| 30 | The datagram is composed of one or more samples of type flow or counter, |
| 31 | and each sample is composed of one or more records describing the sample. |
| 32 | A sample is a single instance of sampled inforamtion, and each record in |
| 33 | the sample gives additional / supplimentary information about the sample. |
| 34 | |
| 35 | The following sample record types are supported: |
| 36 | |
| 37 | Raw Packet Header |
| 38 | opaque = flow_data; enterprise = 0; format = 1 |
| 39 | |
| 40 | Extended Switch Data |
| 41 | opaque = flow_data; enterprise = 0; format = 1001 |
| 42 | |
| 43 | Extended Router Data |
| 44 | opaque = flow_data; enterprise = 0; format = 1002 |
| 45 | |
| 46 | Extended Gateway Data |
| 47 | opaque = flow_data; enterprise = 0; format = 1003 |
| 48 | |
| 49 | Extended User Data |
| 50 | opaque = flow_data; enterprise = 0; format = 1004 |
| 51 | |
| 52 | Extended URL Data |
| 53 | opaque = flow_data; enterprise = 0; format = 1005 |
| 54 | |
| 55 | The following types of counter records are supported: |
| 56 | |
| 57 | Generic Interface Counters - see RFC 2233 |
| 58 | opaque = counter_data; enterprise = 0; format = 1 |
| 59 | |
| 60 | Ethernet Interface Counters - see RFC 2358 |
| 61 | opaque = counter_data; enterprise = 0; format = 2 |
| 62 | |
| 63 | SFlow is encoded using XDR (RFC4506). There are a few places |
| 64 | where the standard 4-byte fields are partitioned into two |
| 65 | bitfields of different lengths. I'm not sure why the designers |
| 66 | chose to pack together two values like this in some places, and |
| 67 | in others they use the entire 4-byte value to store a number that |
| 68 | will never be more than a few bits. In any case, there are a couple |
| 69 | of types defined to handle the decoding of these bitfields, and |
| 70 | that's why they're there. */ |
| 71 | |
| 72 | package layers |
| 73 | |
| 74 | import ( |
| 75 | "encoding/binary" |
| 76 | "errors" |
| 77 | "fmt" |
| 78 | "net" |
| 79 | |
| 80 | "github.com/google/gopacket" |
| 81 | ) |
| 82 | |
| 83 | // SFlowRecord holds both flow sample records and counter sample records. |
| 84 | // A Record is the structure that actually holds the sampled data |
| 85 | // and / or counters. |
| 86 | type SFlowRecord interface { |
| 87 | } |
| 88 | |
| 89 | // SFlowDataSource encodes a 2-bit SFlowSourceFormat in its most significant |
| 90 | // 2 bits, and an SFlowSourceValue in its least significant 30 bits. |
| 91 | // These types and values define the meaning of the inteface information |
| 92 | // presented in the sample metadata. |
| 93 | type SFlowDataSource int32 |
| 94 | |
| 95 | func (sdc SFlowDataSource) decode() (SFlowSourceFormat, SFlowSourceValue) { |
| 96 | leftField := sdc >> 30 |
| 97 | rightField := uint32(0x3FFFFFFF) & uint32(sdc) |
| 98 | return SFlowSourceFormat(leftField), SFlowSourceValue(rightField) |
| 99 | } |
| 100 | |
| 101 | type SFlowDataSourceExpanded struct { |
| 102 | SourceIDClass SFlowSourceFormat |
| 103 | SourceIDIndex SFlowSourceValue |
| 104 | } |
| 105 | |
| 106 | func (sdce SFlowDataSourceExpanded) decode() (SFlowSourceFormat, SFlowSourceValue) { |
| 107 | leftField := sdce.SourceIDClass >> 30 |
| 108 | rightField := uint32(0x3FFFFFFF) & uint32(sdce.SourceIDIndex) |
| 109 | return SFlowSourceFormat(leftField), SFlowSourceValue(rightField) |
| 110 | } |
| 111 | |
| 112 | type SFlowSourceFormat uint32 |
| 113 | |
| 114 | type SFlowSourceValue uint32 |
| 115 | |
| 116 | const ( |
| 117 | SFlowTypeSingleInterface SFlowSourceFormat = 0 |
| 118 | SFlowTypePacketDiscarded SFlowSourceFormat = 1 |
| 119 | SFlowTypeMultipleDestinations SFlowSourceFormat = 2 |
| 120 | ) |
| 121 | |
| 122 | func (sdf SFlowSourceFormat) String() string { |
| 123 | switch sdf { |
| 124 | case SFlowTypeSingleInterface: |
| 125 | return "Single Interface" |
| 126 | case SFlowTypePacketDiscarded: |
| 127 | return "Packet Discarded" |
| 128 | case SFlowTypeMultipleDestinations: |
| 129 | return "Multiple Destinations" |
| 130 | default: |
| 131 | return "UNKNOWN" |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | func decodeSFlow(data []byte, p gopacket.PacketBuilder) error { |
| 136 | s := &SFlowDatagram{} |
| 137 | err := s.DecodeFromBytes(data, p) |
| 138 | if err != nil { |
| 139 | return err |
| 140 | } |
| 141 | p.AddLayer(s) |
| 142 | p.SetApplicationLayer(s) |
| 143 | return nil |
| 144 | } |
| 145 | |
| 146 | // SFlowDatagram is the outermost container which holds some basic information |
| 147 | // about the reporting agent, and holds at least one sample record |
| 148 | type SFlowDatagram struct { |
| 149 | BaseLayer |
| 150 | |
| 151 | DatagramVersion uint32 |
| 152 | AgentAddress net.IP |
| 153 | SubAgentID uint32 |
| 154 | SequenceNumber uint32 |
| 155 | AgentUptime uint32 |
| 156 | SampleCount uint32 |
| 157 | FlowSamples []SFlowFlowSample |
| 158 | CounterSamples []SFlowCounterSample |
| 159 | } |
| 160 | |
| 161 | // An SFlow datagram's outer container has the following |
| 162 | // structure: |
| 163 | |
| 164 | // 0 15 31 |
| 165 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 166 | // | int sFlow version (2|4|5) | |
| 167 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 168 | // | int IP version of the Agent (1=v4|2=v6) | |
| 169 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 170 | // / Agent IP address (v4=4byte|v6=16byte) / |
| 171 | // / / |
| 172 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 173 | // | int sub agent id | |
| 174 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 175 | // | int datagram sequence number | |
| 176 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 177 | // | int switch uptime in ms | |
| 178 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 179 | // | int n samples in datagram | |
| 180 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 181 | // / n samples / |
| 182 | // / / |
| 183 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 184 | |
| 185 | // SFlowDataFormat encodes the EnterpriseID in the most |
| 186 | // significant 12 bits, and the SampleType in the least significant |
| 187 | // 20 bits. |
| 188 | type SFlowDataFormat uint32 |
| 189 | |
| 190 | func (sdf SFlowDataFormat) decode() (SFlowEnterpriseID, SFlowSampleType) { |
| 191 | leftField := sdf >> 12 |
| 192 | rightField := uint32(0xFFF) & uint32(sdf) |
| 193 | return SFlowEnterpriseID(leftField), SFlowSampleType(rightField) |
| 194 | } |
| 195 | |
| 196 | // SFlowEnterpriseID is used to differentiate between the |
| 197 | // official SFlow standard, and other, vendor-specific |
| 198 | // types of flow data. (Similiar to SNMP's enterprise MIB |
| 199 | // OIDs) Only the office SFlow Enterprise ID is decoded |
| 200 | // here. |
| 201 | type SFlowEnterpriseID uint32 |
| 202 | |
| 203 | const ( |
| 204 | SFlowStandard SFlowEnterpriseID = 0 |
| 205 | ) |
| 206 | |
| 207 | func (eid SFlowEnterpriseID) String() string { |
| 208 | switch eid { |
| 209 | case SFlowStandard: |
| 210 | return "Standard SFlow" |
| 211 | default: |
| 212 | return "" |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | func (eid SFlowEnterpriseID) GetType() SFlowEnterpriseID { |
| 217 | return SFlowStandard |
| 218 | } |
| 219 | |
| 220 | // SFlowSampleType specifies the type of sample. Only flow samples |
| 221 | // and counter samples are supported |
| 222 | type SFlowSampleType uint32 |
| 223 | |
| 224 | const ( |
| 225 | SFlowTypeFlowSample SFlowSampleType = 1 |
| 226 | SFlowTypeCounterSample SFlowSampleType = 2 |
| 227 | SFlowTypeExpandedFlowSample SFlowSampleType = 3 |
| 228 | SFlowTypeExpandedCounterSample SFlowSampleType = 4 |
| 229 | ) |
| 230 | |
| 231 | func (st SFlowSampleType) GetType() SFlowSampleType { |
| 232 | switch st { |
| 233 | case SFlowTypeFlowSample: |
| 234 | return SFlowTypeFlowSample |
| 235 | case SFlowTypeCounterSample: |
| 236 | return SFlowTypeCounterSample |
| 237 | case SFlowTypeExpandedFlowSample: |
| 238 | return SFlowTypeExpandedFlowSample |
| 239 | case SFlowTypeExpandedCounterSample: |
| 240 | return SFlowTypeExpandedCounterSample |
| 241 | default: |
| 242 | panic("Invalid Sample Type") |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | func (st SFlowSampleType) String() string { |
| 247 | switch st { |
| 248 | case SFlowTypeFlowSample: |
| 249 | return "Flow Sample" |
| 250 | case SFlowTypeCounterSample: |
| 251 | return "Counter Sample" |
| 252 | case SFlowTypeExpandedFlowSample: |
| 253 | return "Expanded Flow Sample" |
| 254 | case SFlowTypeExpandedCounterSample: |
| 255 | return "Expanded Counter Sample" |
| 256 | default: |
| 257 | return "" |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | func (s *SFlowDatagram) LayerType() gopacket.LayerType { return LayerTypeSFlow } |
| 262 | |
| 263 | func (d *SFlowDatagram) Payload() []byte { return nil } |
| 264 | |
| 265 | func (d *SFlowDatagram) CanDecode() gopacket.LayerClass { return LayerTypeSFlow } |
| 266 | |
| 267 | func (d *SFlowDatagram) NextLayerType() gopacket.LayerType { return gopacket.LayerTypePayload } |
| 268 | |
| 269 | // SFlowIPType determines what form the IP address being decoded will |
| 270 | // take. This is an XDR union type allowing for both IPv4 and IPv6 |
| 271 | type SFlowIPType uint32 |
| 272 | |
| 273 | const ( |
| 274 | SFlowIPv4 SFlowIPType = 1 |
| 275 | SFlowIPv6 SFlowIPType = 2 |
| 276 | ) |
| 277 | |
| 278 | func (s SFlowIPType) String() string { |
| 279 | switch s { |
| 280 | case SFlowIPv4: |
| 281 | return "IPv4" |
| 282 | case SFlowIPv6: |
| 283 | return "IPv6" |
| 284 | default: |
| 285 | return "" |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | func (s SFlowIPType) Length() int { |
| 290 | switch s { |
| 291 | case SFlowIPv4: |
| 292 | return 4 |
| 293 | case SFlowIPv6: |
| 294 | return 16 |
| 295 | default: |
| 296 | return 0 |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | func (s *SFlowDatagram) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error { |
| 301 | var agentAddressType SFlowIPType |
| 302 | |
| 303 | data, s.DatagramVersion = data[4:], binary.BigEndian.Uint32(data[:4]) |
| 304 | data, agentAddressType = data[4:], SFlowIPType(binary.BigEndian.Uint32(data[:4])) |
| 305 | data, s.AgentAddress = data[agentAddressType.Length():], data[:agentAddressType.Length()] |
| 306 | data, s.SubAgentID = data[4:], binary.BigEndian.Uint32(data[:4]) |
| 307 | data, s.SequenceNumber = data[4:], binary.BigEndian.Uint32(data[:4]) |
| 308 | data, s.AgentUptime = data[4:], binary.BigEndian.Uint32(data[:4]) |
| 309 | data, s.SampleCount = data[4:], binary.BigEndian.Uint32(data[:4]) |
| 310 | |
| 311 | if s.SampleCount < 1 { |
| 312 | return fmt.Errorf("SFlow Datagram has invalid sample length: %d", s.SampleCount) |
| 313 | } |
| 314 | for i := uint32(0); i < s.SampleCount; i++ { |
| 315 | sdf := SFlowDataFormat(binary.BigEndian.Uint32(data[:4])) |
| 316 | _, sampleType := sdf.decode() |
| 317 | switch sampleType { |
| 318 | case SFlowTypeFlowSample: |
| 319 | if flowSample, err := decodeFlowSample(&data, false); err == nil { |
| 320 | s.FlowSamples = append(s.FlowSamples, flowSample) |
| 321 | } else { |
| 322 | return err |
| 323 | } |
| 324 | case SFlowTypeCounterSample: |
| 325 | if counterSample, err := decodeCounterSample(&data, false); err == nil { |
| 326 | s.CounterSamples = append(s.CounterSamples, counterSample) |
| 327 | } else { |
| 328 | return err |
| 329 | } |
| 330 | case SFlowTypeExpandedFlowSample: |
| 331 | if flowSample, err := decodeFlowSample(&data, true); err == nil { |
| 332 | s.FlowSamples = append(s.FlowSamples, flowSample) |
| 333 | } else { |
| 334 | return err |
| 335 | } |
| 336 | case SFlowTypeExpandedCounterSample: |
| 337 | if counterSample, err := decodeCounterSample(&data, true); err == nil { |
| 338 | s.CounterSamples = append(s.CounterSamples, counterSample) |
| 339 | } else { |
| 340 | return err |
| 341 | } |
| 342 | |
| 343 | default: |
| 344 | return fmt.Errorf("Unsupported SFlow sample type %d", sampleType) |
| 345 | } |
| 346 | } |
| 347 | return nil |
| 348 | } |
| 349 | |
| 350 | // SFlowFlowSample represents a sampled packet and contains |
| 351 | // one or more records describing the packet |
| 352 | type SFlowFlowSample struct { |
| 353 | EnterpriseID SFlowEnterpriseID |
| 354 | Format SFlowSampleType |
| 355 | SampleLength uint32 |
| 356 | SequenceNumber uint32 |
| 357 | SourceIDClass SFlowSourceFormat |
| 358 | SourceIDIndex SFlowSourceValue |
| 359 | SamplingRate uint32 |
| 360 | SamplePool uint32 |
| 361 | Dropped uint32 |
| 362 | InputInterfaceFormat uint32 |
| 363 | InputInterface uint32 |
| 364 | OutputInterfaceFormat uint32 |
| 365 | OutputInterface uint32 |
| 366 | RecordCount uint32 |
| 367 | Records []SFlowRecord |
| 368 | } |
| 369 | |
| 370 | // Flow samples have the following structure. Note |
| 371 | // the bit fields to encode the Enterprise ID and the |
| 372 | // Flow record format: type 1 |
| 373 | |
| 374 | // 0 15 31 |
| 375 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 376 | // | 20 bit Interprise (0) |12 bit format | |
| 377 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 378 | // | sample length | |
| 379 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 380 | // | int sample sequence number | |
| 381 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 382 | // |id type | src id index value | |
| 383 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 384 | // | int sampling rate | |
| 385 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 386 | // | int sample pool | |
| 387 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 388 | // | int drops | |
| 389 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 390 | // | int input ifIndex | |
| 391 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 392 | // | int output ifIndex | |
| 393 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 394 | // | int number of records | |
| 395 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 396 | // / flow records / |
| 397 | // / / |
| 398 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 399 | |
| 400 | // Flow samples have the following structure. |
| 401 | // Flow record format: type 3 |
| 402 | |
| 403 | // 0 15 31 |
| 404 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 405 | // | 20 bit Interprise (0) |12 bit format | |
| 406 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 407 | // | sample length | |
| 408 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 409 | // | int sample sequence number | |
| 410 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 411 | // | int src id type | |
| 412 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 413 | // | int src id index value | |
| 414 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 415 | // | int sampling rate | |
| 416 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 417 | // | int sample pool | |
| 418 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 419 | // | int drops | |
| 420 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 421 | // | int input interface format | |
| 422 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 423 | // | int input interface value | |
| 424 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 425 | // | int output interface format | |
| 426 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 427 | // | int output interface value | |
| 428 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 429 | // | int number of records | |
| 430 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 431 | // / flow records / |
| 432 | // / / |
| 433 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 434 | |
| 435 | type SFlowFlowDataFormat uint32 |
| 436 | |
| 437 | func (fdf SFlowFlowDataFormat) decode() (SFlowEnterpriseID, SFlowFlowRecordType) { |
| 438 | leftField := fdf >> 12 |
| 439 | rightField := uint32(0xFFF) & uint32(fdf) |
| 440 | return SFlowEnterpriseID(leftField), SFlowFlowRecordType(rightField) |
| 441 | } |
| 442 | |
| 443 | func (fs SFlowFlowSample) GetRecords() []SFlowRecord { |
| 444 | return fs.Records |
| 445 | } |
| 446 | |
| 447 | func (fs SFlowFlowSample) GetType() SFlowSampleType { |
| 448 | return SFlowTypeFlowSample |
| 449 | } |
| 450 | |
| 451 | func skipRecord(data *[]byte) { |
| 452 | recordLength := int(binary.BigEndian.Uint32((*data)[4:])) |
| 453 | *data = (*data)[(recordLength+((4-recordLength)%4))+8:] |
| 454 | } |
| 455 | |
| 456 | func decodeFlowSample(data *[]byte, expanded bool) (SFlowFlowSample, error) { |
| 457 | s := SFlowFlowSample{} |
| 458 | var sdf SFlowDataFormat |
| 459 | *data, sdf = (*data)[4:], SFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 460 | var sdc SFlowDataSource |
| 461 | |
| 462 | s.EnterpriseID, s.Format = sdf.decode() |
| 463 | if len(*data) < 4 { |
| 464 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 465 | } |
| 466 | *data, s.SampleLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 467 | if len(*data) < 4 { |
| 468 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 469 | } |
| 470 | *data, s.SequenceNumber = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 471 | if expanded { |
| 472 | if len(*data) < 4 { |
| 473 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 474 | } |
| 475 | *data, s.SourceIDClass = (*data)[4:], SFlowSourceFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 476 | if len(*data) < 4 { |
| 477 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 478 | } |
| 479 | *data, s.SourceIDIndex = (*data)[4:], SFlowSourceValue(binary.BigEndian.Uint32((*data)[:4])) |
| 480 | } else { |
| 481 | if len(*data) < 4 { |
| 482 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 483 | } |
| 484 | *data, sdc = (*data)[4:], SFlowDataSource(binary.BigEndian.Uint32((*data)[:4])) |
| 485 | s.SourceIDClass, s.SourceIDIndex = sdc.decode() |
| 486 | } |
| 487 | if len(*data) < 4 { |
| 488 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 489 | } |
| 490 | *data, s.SamplingRate = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 491 | if len(*data) < 4 { |
| 492 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 493 | } |
| 494 | *data, s.SamplePool = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 495 | if len(*data) < 4 { |
| 496 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 497 | } |
| 498 | *data, s.Dropped = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 499 | |
| 500 | if expanded { |
| 501 | if len(*data) < 4 { |
| 502 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 503 | } |
| 504 | *data, s.InputInterfaceFormat = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 505 | if len(*data) < 4 { |
| 506 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 507 | } |
| 508 | *data, s.InputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 509 | if len(*data) < 4 { |
| 510 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 511 | } |
| 512 | *data, s.OutputInterfaceFormat = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 513 | if len(*data) < 4 { |
| 514 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 515 | } |
| 516 | *data, s.OutputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 517 | } else { |
| 518 | if len(*data) < 4 { |
| 519 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 520 | } |
| 521 | *data, s.InputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 522 | if len(*data) < 4 { |
| 523 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 524 | } |
| 525 | *data, s.OutputInterface = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 526 | } |
| 527 | if len(*data) < 4 { |
| 528 | return SFlowFlowSample{}, errors.New("ethernet counters too small") |
| 529 | } |
| 530 | *data, s.RecordCount = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 531 | |
| 532 | for i := uint32(0); i < s.RecordCount; i++ { |
| 533 | rdf := SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 534 | enterpriseID, flowRecordType := rdf.decode() |
| 535 | |
| 536 | // Try to decode when EnterpriseID is 0 signaling |
| 537 | // default sflow structs are used according specification |
| 538 | // Unexpected behavior detected for e.g. with pmacct |
| 539 | if enterpriseID == 0 { |
| 540 | switch flowRecordType { |
| 541 | case SFlowTypeRawPacketFlow: |
| 542 | if record, err := decodeRawPacketFlowRecord(data); err == nil { |
| 543 | s.Records = append(s.Records, record) |
| 544 | } else { |
| 545 | return s, err |
| 546 | } |
| 547 | case SFlowTypeExtendedUserFlow: |
| 548 | if record, err := decodeExtendedUserFlow(data); err == nil { |
| 549 | s.Records = append(s.Records, record) |
| 550 | } else { |
| 551 | return s, err |
| 552 | } |
| 553 | case SFlowTypeExtendedUrlFlow: |
| 554 | if record, err := decodeExtendedURLRecord(data); err == nil { |
| 555 | s.Records = append(s.Records, record) |
| 556 | } else { |
| 557 | return s, err |
| 558 | } |
| 559 | case SFlowTypeExtendedSwitchFlow: |
| 560 | if record, err := decodeExtendedSwitchFlowRecord(data); err == nil { |
| 561 | s.Records = append(s.Records, record) |
| 562 | } else { |
| 563 | return s, err |
| 564 | } |
| 565 | case SFlowTypeExtendedRouterFlow: |
| 566 | if record, err := decodeExtendedRouterFlowRecord(data); err == nil { |
| 567 | s.Records = append(s.Records, record) |
| 568 | } else { |
| 569 | return s, err |
| 570 | } |
| 571 | case SFlowTypeExtendedGatewayFlow: |
| 572 | if record, err := decodeExtendedGatewayFlowRecord(data); err == nil { |
| 573 | s.Records = append(s.Records, record) |
| 574 | } else { |
| 575 | return s, err |
| 576 | } |
| 577 | case SFlowTypeEthernetFrameFlow: |
| 578 | if record, err := decodeEthernetFrameFlowRecord(data); err == nil { |
| 579 | s.Records = append(s.Records, record) |
| 580 | } else { |
| 581 | return s, err |
| 582 | } |
| 583 | case SFlowTypeIpv4Flow: |
| 584 | if record, err := decodeSFlowIpv4Record(data); err == nil { |
| 585 | s.Records = append(s.Records, record) |
| 586 | } else { |
| 587 | return s, err |
| 588 | } |
| 589 | case SFlowTypeIpv6Flow: |
| 590 | if record, err := decodeSFlowIpv6Record(data); err == nil { |
| 591 | s.Records = append(s.Records, record) |
| 592 | } else { |
| 593 | return s, err |
| 594 | } |
| 595 | case SFlowTypeExtendedMlpsFlow: |
| 596 | // TODO |
| 597 | skipRecord(data) |
| 598 | return s, errors.New("skipping TypeExtendedMlpsFlow") |
| 599 | case SFlowTypeExtendedNatFlow: |
| 600 | // TODO |
| 601 | skipRecord(data) |
| 602 | return s, errors.New("skipping TypeExtendedNatFlow") |
| 603 | case SFlowTypeExtendedMlpsTunnelFlow: |
| 604 | // TODO |
| 605 | skipRecord(data) |
| 606 | return s, errors.New("skipping TypeExtendedMlpsTunnelFlow") |
| 607 | case SFlowTypeExtendedMlpsVcFlow: |
| 608 | // TODO |
| 609 | skipRecord(data) |
| 610 | return s, errors.New("skipping TypeExtendedMlpsVcFlow") |
| 611 | case SFlowTypeExtendedMlpsFecFlow: |
| 612 | // TODO |
| 613 | skipRecord(data) |
| 614 | return s, errors.New("skipping TypeExtendedMlpsFecFlow") |
| 615 | case SFlowTypeExtendedMlpsLvpFecFlow: |
| 616 | // TODO |
| 617 | skipRecord(data) |
| 618 | return s, errors.New("skipping TypeExtendedMlpsLvpFecFlow") |
| 619 | case SFlowTypeExtendedVlanFlow: |
| 620 | // TODO |
| 621 | skipRecord(data) |
| 622 | return s, errors.New("skipping TypeExtendedVlanFlow") |
| 623 | case SFlowTypeExtendedIpv4TunnelEgressFlow: |
| 624 | if record, err := decodeExtendedIpv4TunnelEgress(data); err == nil { |
| 625 | s.Records = append(s.Records, record) |
| 626 | } else { |
| 627 | return s, err |
| 628 | } |
| 629 | case SFlowTypeExtendedIpv4TunnelIngressFlow: |
| 630 | if record, err := decodeExtendedIpv4TunnelIngress(data); err == nil { |
| 631 | s.Records = append(s.Records, record) |
| 632 | } else { |
| 633 | return s, err |
| 634 | } |
| 635 | case SFlowTypeExtendedIpv6TunnelEgressFlow: |
| 636 | if record, err := decodeExtendedIpv6TunnelEgress(data); err == nil { |
| 637 | s.Records = append(s.Records, record) |
| 638 | } else { |
| 639 | return s, err |
| 640 | } |
| 641 | case SFlowTypeExtendedIpv6TunnelIngressFlow: |
| 642 | if record, err := decodeExtendedIpv6TunnelIngress(data); err == nil { |
| 643 | s.Records = append(s.Records, record) |
| 644 | } else { |
| 645 | return s, err |
| 646 | } |
| 647 | case SFlowTypeExtendedDecapsulateEgressFlow: |
| 648 | if record, err := decodeExtendedDecapsulateEgress(data); err == nil { |
| 649 | s.Records = append(s.Records, record) |
| 650 | } else { |
| 651 | return s, err |
| 652 | } |
| 653 | case SFlowTypeExtendedDecapsulateIngressFlow: |
| 654 | if record, err := decodeExtendedDecapsulateIngress(data); err == nil { |
| 655 | s.Records = append(s.Records, record) |
| 656 | } else { |
| 657 | return s, err |
| 658 | } |
| 659 | case SFlowTypeExtendedVniEgressFlow: |
| 660 | if record, err := decodeExtendedVniEgress(data); err == nil { |
| 661 | s.Records = append(s.Records, record) |
| 662 | } else { |
| 663 | return s, err |
| 664 | } |
| 665 | case SFlowTypeExtendedVniIngressFlow: |
| 666 | if record, err := decodeExtendedVniIngress(data); err == nil { |
| 667 | s.Records = append(s.Records, record) |
| 668 | } else { |
| 669 | return s, err |
| 670 | } |
| 671 | default: |
| 672 | return s, fmt.Errorf("Unsupported flow record type: %d", flowRecordType) |
| 673 | } |
| 674 | } else { |
| 675 | skipRecord(data) |
| 676 | } |
| 677 | } |
| 678 | return s, nil |
| 679 | } |
| 680 | |
| 681 | // Counter samples report information about various counter |
| 682 | // objects. Typically these are items like IfInOctets, or |
| 683 | // CPU / Memory stats, etc. SFlow will report these at regular |
| 684 | // intervals as configured on the agent. If one were sufficiently |
| 685 | // industrious, this could be used to replace the typical |
| 686 | // SNMP polling used for such things. |
| 687 | type SFlowCounterSample struct { |
| 688 | EnterpriseID SFlowEnterpriseID |
| 689 | Format SFlowSampleType |
| 690 | SampleLength uint32 |
| 691 | SequenceNumber uint32 |
| 692 | SourceIDClass SFlowSourceFormat |
| 693 | SourceIDIndex SFlowSourceValue |
| 694 | RecordCount uint32 |
| 695 | Records []SFlowRecord |
| 696 | } |
| 697 | |
| 698 | // Counter samples have the following structure: |
| 699 | |
| 700 | // 0 15 31 |
| 701 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 702 | // | int sample sequence number | |
| 703 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 704 | // |id type | src id index value | |
| 705 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 706 | // | int number of records | |
| 707 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 708 | // / counter records / |
| 709 | // / / |
| 710 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 711 | |
| 712 | type SFlowCounterDataFormat uint32 |
| 713 | |
| 714 | func (cdf SFlowCounterDataFormat) decode() (SFlowEnterpriseID, SFlowCounterRecordType) { |
| 715 | leftField := cdf >> 12 |
| 716 | rightField := uint32(0xFFF) & uint32(cdf) |
| 717 | return SFlowEnterpriseID(leftField), SFlowCounterRecordType(rightField) |
| 718 | } |
| 719 | |
| 720 | // GetRecords will return a slice of interface types |
| 721 | // representing records. A type switch can be used to |
| 722 | // get at the underlying SFlowCounterRecordType. |
| 723 | func (cs SFlowCounterSample) GetRecords() []SFlowRecord { |
| 724 | return cs.Records |
| 725 | } |
| 726 | |
| 727 | // GetType will report the type of sample. Only the |
| 728 | // compact form of counter samples is supported |
| 729 | func (cs SFlowCounterSample) GetType() SFlowSampleType { |
| 730 | return SFlowTypeCounterSample |
| 731 | } |
| 732 | |
| 733 | type SFlowCounterRecordType uint32 |
| 734 | |
| 735 | const ( |
| 736 | SFlowTypeGenericInterfaceCounters SFlowCounterRecordType = 1 |
| 737 | SFlowTypeEthernetInterfaceCounters SFlowCounterRecordType = 2 |
| 738 | SFlowTypeTokenRingInterfaceCounters SFlowCounterRecordType = 3 |
| 739 | SFlowType100BaseVGInterfaceCounters SFlowCounterRecordType = 4 |
| 740 | SFlowTypeVLANCounters SFlowCounterRecordType = 5 |
| 741 | SFlowTypeLACPCounters SFlowCounterRecordType = 7 |
| 742 | SFlowTypeProcessorCounters SFlowCounterRecordType = 1001 |
| 743 | SFlowTypeOpenflowPortCounters SFlowCounterRecordType = 1004 |
| 744 | SFlowTypePORTNAMECounters SFlowCounterRecordType = 1005 |
| 745 | SFLowTypeAPPRESOURCESCounters SFlowCounterRecordType = 2203 |
| 746 | SFlowTypeOVSDPCounters SFlowCounterRecordType = 2207 |
| 747 | ) |
| 748 | |
| 749 | func (cr SFlowCounterRecordType) String() string { |
| 750 | switch cr { |
| 751 | case SFlowTypeGenericInterfaceCounters: |
| 752 | return "Generic Interface Counters" |
| 753 | case SFlowTypeEthernetInterfaceCounters: |
| 754 | return "Ethernet Interface Counters" |
| 755 | case SFlowTypeTokenRingInterfaceCounters: |
| 756 | return "Token Ring Interface Counters" |
| 757 | case SFlowType100BaseVGInterfaceCounters: |
| 758 | return "100BaseVG Interface Counters" |
| 759 | case SFlowTypeVLANCounters: |
| 760 | return "VLAN Counters" |
| 761 | case SFlowTypeLACPCounters: |
| 762 | return "LACP Counters" |
| 763 | case SFlowTypeProcessorCounters: |
| 764 | return "Processor Counters" |
| 765 | case SFlowTypeOpenflowPortCounters: |
| 766 | return "Openflow Port Counters" |
| 767 | case SFlowTypePORTNAMECounters: |
| 768 | return "PORT NAME Counters" |
| 769 | case SFLowTypeAPPRESOURCESCounters: |
| 770 | return "App Resources Counters" |
| 771 | case SFlowTypeOVSDPCounters: |
| 772 | return "OVSDP Counters" |
| 773 | default: |
| 774 | return "" |
| 775 | |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | func decodeCounterSample(data *[]byte, expanded bool) (SFlowCounterSample, error) { |
| 780 | s := SFlowCounterSample{} |
| 781 | var sdc SFlowDataSource |
| 782 | var sdce SFlowDataSourceExpanded |
| 783 | var sdf SFlowDataFormat |
| 784 | |
| 785 | *data, sdf = (*data)[4:], SFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 786 | s.EnterpriseID, s.Format = sdf.decode() |
| 787 | *data, s.SampleLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 788 | *data, s.SequenceNumber = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 789 | if expanded { |
| 790 | *data, sdce = (*data)[8:], SFlowDataSourceExpanded{SFlowSourceFormat(binary.BigEndian.Uint32((*data)[:4])), SFlowSourceValue(binary.BigEndian.Uint32((*data)[4:8]))} |
| 791 | s.SourceIDClass, s.SourceIDIndex = sdce.decode() |
| 792 | } else { |
| 793 | *data, sdc = (*data)[4:], SFlowDataSource(binary.BigEndian.Uint32((*data)[:4])) |
| 794 | s.SourceIDClass, s.SourceIDIndex = sdc.decode() |
| 795 | } |
| 796 | *data, s.RecordCount = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 797 | |
| 798 | for i := uint32(0); i < s.RecordCount; i++ { |
| 799 | cdf := SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 800 | _, counterRecordType := cdf.decode() |
| 801 | switch counterRecordType { |
| 802 | case SFlowTypeGenericInterfaceCounters: |
| 803 | if record, err := decodeGenericInterfaceCounters(data); err == nil { |
| 804 | s.Records = append(s.Records, record) |
| 805 | } else { |
| 806 | return s, err |
| 807 | } |
| 808 | case SFlowTypeEthernetInterfaceCounters: |
| 809 | if record, err := decodeEthernetCounters(data); err == nil { |
| 810 | s.Records = append(s.Records, record) |
| 811 | } else { |
| 812 | return s, err |
| 813 | } |
| 814 | case SFlowTypeTokenRingInterfaceCounters: |
| 815 | skipRecord(data) |
| 816 | return s, errors.New("skipping TypeTokenRingInterfaceCounters") |
| 817 | case SFlowType100BaseVGInterfaceCounters: |
| 818 | skipRecord(data) |
| 819 | return s, errors.New("skipping Type100BaseVGInterfaceCounters") |
| 820 | case SFlowTypeVLANCounters: |
| 821 | if record, err := decodeVLANCounters(data); err == nil { |
| 822 | s.Records = append(s.Records, record) |
| 823 | } else { |
| 824 | return s, err |
| 825 | } |
| 826 | case SFlowTypeLACPCounters: |
| 827 | if record, err := decodeLACPCounters(data); err == nil { |
| 828 | s.Records = append(s.Records, record) |
| 829 | } else { |
| 830 | return s, err |
| 831 | } |
| 832 | case SFlowTypeProcessorCounters: |
| 833 | if record, err := decodeProcessorCounters(data); err == nil { |
| 834 | s.Records = append(s.Records, record) |
| 835 | } else { |
| 836 | return s, err |
| 837 | } |
| 838 | case SFlowTypeOpenflowPortCounters: |
| 839 | if record, err := decodeOpenflowportCounters(data); err == nil { |
| 840 | s.Records = append(s.Records, record) |
| 841 | } else { |
| 842 | return s, err |
| 843 | } |
| 844 | case SFlowTypePORTNAMECounters: |
| 845 | if record, err := decodePortnameCounters(data); err == nil { |
| 846 | s.Records = append(s.Records, record) |
| 847 | } else { |
| 848 | return s, err |
| 849 | } |
| 850 | case SFLowTypeAPPRESOURCESCounters: |
| 851 | if record, err := decodeAppresourcesCounters(data); err == nil { |
| 852 | s.Records = append(s.Records, record) |
| 853 | } else { |
| 854 | return s, err |
| 855 | } |
| 856 | case SFlowTypeOVSDPCounters: |
| 857 | if record, err := decodeOVSDPCounters(data); err == nil { |
| 858 | s.Records = append(s.Records, record) |
| 859 | } else { |
| 860 | return s, err |
| 861 | } |
| 862 | default: |
| 863 | return s, fmt.Errorf("Invalid counter record type: %d", counterRecordType) |
| 864 | } |
| 865 | } |
| 866 | return s, nil |
| 867 | } |
| 868 | |
| 869 | // SFlowBaseFlowRecord holds the fields common to all records |
| 870 | // of type SFlowFlowRecordType |
| 871 | type SFlowBaseFlowRecord struct { |
| 872 | EnterpriseID SFlowEnterpriseID |
| 873 | Format SFlowFlowRecordType |
| 874 | FlowDataLength uint32 |
| 875 | } |
| 876 | |
| 877 | func (bfr SFlowBaseFlowRecord) GetType() SFlowFlowRecordType { |
| 878 | return bfr.Format |
| 879 | } |
| 880 | |
| 881 | // SFlowFlowRecordType denotes what kind of Flow Record is |
| 882 | // represented. See RFC 3176 |
| 883 | type SFlowFlowRecordType uint32 |
| 884 | |
| 885 | const ( |
| 886 | SFlowTypeRawPacketFlow SFlowFlowRecordType = 1 |
| 887 | SFlowTypeEthernetFrameFlow SFlowFlowRecordType = 2 |
| 888 | SFlowTypeIpv4Flow SFlowFlowRecordType = 3 |
| 889 | SFlowTypeIpv6Flow SFlowFlowRecordType = 4 |
| 890 | SFlowTypeExtendedSwitchFlow SFlowFlowRecordType = 1001 |
| 891 | SFlowTypeExtendedRouterFlow SFlowFlowRecordType = 1002 |
| 892 | SFlowTypeExtendedGatewayFlow SFlowFlowRecordType = 1003 |
| 893 | SFlowTypeExtendedUserFlow SFlowFlowRecordType = 1004 |
| 894 | SFlowTypeExtendedUrlFlow SFlowFlowRecordType = 1005 |
| 895 | SFlowTypeExtendedMlpsFlow SFlowFlowRecordType = 1006 |
| 896 | SFlowTypeExtendedNatFlow SFlowFlowRecordType = 1007 |
| 897 | SFlowTypeExtendedMlpsTunnelFlow SFlowFlowRecordType = 1008 |
| 898 | SFlowTypeExtendedMlpsVcFlow SFlowFlowRecordType = 1009 |
| 899 | SFlowTypeExtendedMlpsFecFlow SFlowFlowRecordType = 1010 |
| 900 | SFlowTypeExtendedMlpsLvpFecFlow SFlowFlowRecordType = 1011 |
| 901 | SFlowTypeExtendedVlanFlow SFlowFlowRecordType = 1012 |
| 902 | SFlowTypeExtendedIpv4TunnelEgressFlow SFlowFlowRecordType = 1023 |
| 903 | SFlowTypeExtendedIpv4TunnelIngressFlow SFlowFlowRecordType = 1024 |
| 904 | SFlowTypeExtendedIpv6TunnelEgressFlow SFlowFlowRecordType = 1025 |
| 905 | SFlowTypeExtendedIpv6TunnelIngressFlow SFlowFlowRecordType = 1026 |
| 906 | SFlowTypeExtendedDecapsulateEgressFlow SFlowFlowRecordType = 1027 |
| 907 | SFlowTypeExtendedDecapsulateIngressFlow SFlowFlowRecordType = 1028 |
| 908 | SFlowTypeExtendedVniEgressFlow SFlowFlowRecordType = 1029 |
| 909 | SFlowTypeExtendedVniIngressFlow SFlowFlowRecordType = 1030 |
| 910 | ) |
| 911 | |
| 912 | func (rt SFlowFlowRecordType) String() string { |
| 913 | switch rt { |
| 914 | case SFlowTypeRawPacketFlow: |
| 915 | return "Raw Packet Flow Record" |
| 916 | case SFlowTypeEthernetFrameFlow: |
| 917 | return "Ethernet Frame Flow Record" |
| 918 | case SFlowTypeIpv4Flow: |
| 919 | return "IPv4 Flow Record" |
| 920 | case SFlowTypeIpv6Flow: |
| 921 | return "IPv6 Flow Record" |
| 922 | case SFlowTypeExtendedSwitchFlow: |
| 923 | return "Extended Switch Flow Record" |
| 924 | case SFlowTypeExtendedRouterFlow: |
| 925 | return "Extended Router Flow Record" |
| 926 | case SFlowTypeExtendedGatewayFlow: |
| 927 | return "Extended Gateway Flow Record" |
| 928 | case SFlowTypeExtendedUserFlow: |
| 929 | return "Extended User Flow Record" |
| 930 | case SFlowTypeExtendedUrlFlow: |
| 931 | return "Extended URL Flow Record" |
| 932 | case SFlowTypeExtendedMlpsFlow: |
| 933 | return "Extended MPLS Flow Record" |
| 934 | case SFlowTypeExtendedNatFlow: |
| 935 | return "Extended NAT Flow Record" |
| 936 | case SFlowTypeExtendedMlpsTunnelFlow: |
| 937 | return "Extended MPLS Tunnel Flow Record" |
| 938 | case SFlowTypeExtendedMlpsVcFlow: |
| 939 | return "Extended MPLS VC Flow Record" |
| 940 | case SFlowTypeExtendedMlpsFecFlow: |
| 941 | return "Extended MPLS FEC Flow Record" |
| 942 | case SFlowTypeExtendedMlpsLvpFecFlow: |
| 943 | return "Extended MPLS LVP FEC Flow Record" |
| 944 | case SFlowTypeExtendedVlanFlow: |
| 945 | return "Extended VLAN Flow Record" |
| 946 | case SFlowTypeExtendedIpv4TunnelEgressFlow: |
| 947 | return "Extended IPv4 Tunnel Egress Record" |
| 948 | case SFlowTypeExtendedIpv4TunnelIngressFlow: |
| 949 | return "Extended IPv4 Tunnel Ingress Record" |
| 950 | case SFlowTypeExtendedIpv6TunnelEgressFlow: |
| 951 | return "Extended IPv6 Tunnel Egress Record" |
| 952 | case SFlowTypeExtendedIpv6TunnelIngressFlow: |
| 953 | return "Extended IPv6 Tunnel Ingress Record" |
| 954 | case SFlowTypeExtendedDecapsulateEgressFlow: |
| 955 | return "Extended Decapsulate Egress Record" |
| 956 | case SFlowTypeExtendedDecapsulateIngressFlow: |
| 957 | return "Extended Decapsulate Ingress Record" |
| 958 | case SFlowTypeExtendedVniEgressFlow: |
| 959 | return "Extended VNI Ingress Record" |
| 960 | case SFlowTypeExtendedVniIngressFlow: |
| 961 | return "Extended VNI Ingress Record" |
| 962 | default: |
| 963 | return "" |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | // SFlowRawPacketFlowRecords hold information about a sampled |
| 968 | // packet grabbed as it transited the agent. This is |
| 969 | // perhaps the most useful and interesting record type, |
| 970 | // as it holds the headers of the sampled packet and |
| 971 | // can be used to build up a complete picture of the |
| 972 | // traffic patterns on a network. |
| 973 | // |
| 974 | // The raw packet header is sent back into gopacket for |
| 975 | // decoding, and the resulting gopackt.Packet is stored |
| 976 | // in the Header member |
| 977 | type SFlowRawPacketFlowRecord struct { |
| 978 | SFlowBaseFlowRecord |
| 979 | HeaderProtocol SFlowRawHeaderProtocol |
| 980 | FrameLength uint32 |
| 981 | PayloadRemoved uint32 |
| 982 | HeaderLength uint32 |
| 983 | Header gopacket.Packet |
| 984 | } |
| 985 | |
| 986 | // Raw packet record types have the following structure: |
| 987 | |
| 988 | // 0 15 31 |
| 989 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 990 | // | 20 bit Interprise (0) |12 bit format | |
| 991 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 992 | // | record length | |
| 993 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 994 | // | Header Protocol | |
| 995 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 996 | // | Frame Length | |
| 997 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 998 | // | Payload Removed | |
| 999 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1000 | // | Header Length | |
| 1001 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1002 | // \ Header \ |
| 1003 | // \ \ |
| 1004 | // \ \ |
| 1005 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1006 | |
| 1007 | type SFlowRawHeaderProtocol uint32 |
| 1008 | |
| 1009 | const ( |
| 1010 | SFlowProtoEthernet SFlowRawHeaderProtocol = 1 |
| 1011 | SFlowProtoISO88024 SFlowRawHeaderProtocol = 2 |
| 1012 | SFlowProtoISO88025 SFlowRawHeaderProtocol = 3 |
| 1013 | SFlowProtoFDDI SFlowRawHeaderProtocol = 4 |
| 1014 | SFlowProtoFrameRelay SFlowRawHeaderProtocol = 5 |
| 1015 | SFlowProtoX25 SFlowRawHeaderProtocol = 6 |
| 1016 | SFlowProtoPPP SFlowRawHeaderProtocol = 7 |
| 1017 | SFlowProtoSMDS SFlowRawHeaderProtocol = 8 |
| 1018 | SFlowProtoAAL5 SFlowRawHeaderProtocol = 9 |
| 1019 | SFlowProtoAAL5_IP SFlowRawHeaderProtocol = 10 /* e.g. Cisco AAL5 mux */ |
| 1020 | SFlowProtoIPv4 SFlowRawHeaderProtocol = 11 |
| 1021 | SFlowProtoIPv6 SFlowRawHeaderProtocol = 12 |
| 1022 | SFlowProtoMPLS SFlowRawHeaderProtocol = 13 |
| 1023 | SFlowProtoPOS SFlowRawHeaderProtocol = 14 /* RFC 1662, 2615 */ |
| 1024 | ) |
| 1025 | |
| 1026 | func (sfhp SFlowRawHeaderProtocol) String() string { |
| 1027 | switch sfhp { |
| 1028 | case SFlowProtoEthernet: |
| 1029 | return "ETHERNET-ISO88023" |
| 1030 | case SFlowProtoISO88024: |
| 1031 | return "ISO88024-TOKENBUS" |
| 1032 | case SFlowProtoISO88025: |
| 1033 | return "ISO88025-TOKENRING" |
| 1034 | case SFlowProtoFDDI: |
| 1035 | return "FDDI" |
| 1036 | case SFlowProtoFrameRelay: |
| 1037 | return "FRAME-RELAY" |
| 1038 | case SFlowProtoX25: |
| 1039 | return "X25" |
| 1040 | case SFlowProtoPPP: |
| 1041 | return "PPP" |
| 1042 | case SFlowProtoSMDS: |
| 1043 | return "SMDS" |
| 1044 | case SFlowProtoAAL5: |
| 1045 | return "AAL5" |
| 1046 | case SFlowProtoAAL5_IP: |
| 1047 | return "AAL5-IP" |
| 1048 | case SFlowProtoIPv4: |
| 1049 | return "IPv4" |
| 1050 | case SFlowProtoIPv6: |
| 1051 | return "IPv6" |
| 1052 | case SFlowProtoMPLS: |
| 1053 | return "MPLS" |
| 1054 | case SFlowProtoPOS: |
| 1055 | return "POS" |
| 1056 | } |
| 1057 | return "UNKNOWN" |
| 1058 | } |
| 1059 | |
| 1060 | func decodeRawPacketFlowRecord(data *[]byte) (SFlowRawPacketFlowRecord, error) { |
| 1061 | rec := SFlowRawPacketFlowRecord{} |
| 1062 | header := []byte{} |
| 1063 | var fdf SFlowFlowDataFormat |
| 1064 | |
| 1065 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1066 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 1067 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1068 | *data, rec.HeaderProtocol = (*data)[4:], SFlowRawHeaderProtocol(binary.BigEndian.Uint32((*data)[:4])) |
| 1069 | *data, rec.FrameLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1070 | *data, rec.PayloadRemoved = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1071 | *data, rec.HeaderLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1072 | headerLenWithPadding := int(rec.HeaderLength + ((4 - rec.HeaderLength) % 4)) |
| 1073 | *data, header = (*data)[headerLenWithPadding:], (*data)[:headerLenWithPadding] |
| 1074 | rec.Header = gopacket.NewPacket(header, LayerTypeEthernet, gopacket.Default) |
| 1075 | return rec, nil |
| 1076 | } |
| 1077 | |
| 1078 | // SFlowExtendedSwitchFlowRecord give additional information |
| 1079 | // about the sampled packet if it's available. It's mainly |
| 1080 | // useful for getting at the incoming and outgoing VLANs |
| 1081 | // An agent may or may not provide this information. |
| 1082 | type SFlowExtendedSwitchFlowRecord struct { |
| 1083 | SFlowBaseFlowRecord |
| 1084 | IncomingVLAN uint32 |
| 1085 | IncomingVLANPriority uint32 |
| 1086 | OutgoingVLAN uint32 |
| 1087 | OutgoingVLANPriority uint32 |
| 1088 | } |
| 1089 | |
| 1090 | // Extended switch records have the following structure: |
| 1091 | |
| 1092 | // 0 15 31 |
| 1093 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1094 | // | 20 bit Interprise (0) |12 bit format | |
| 1095 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1096 | // | record length | |
| 1097 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1098 | // | Incoming VLAN | |
| 1099 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1100 | // | Incoming VLAN Priority | |
| 1101 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1102 | // | Outgoing VLAN | |
| 1103 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1104 | // | Outgoing VLAN Priority | |
| 1105 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1106 | |
| 1107 | func decodeExtendedSwitchFlowRecord(data *[]byte) (SFlowExtendedSwitchFlowRecord, error) { |
| 1108 | es := SFlowExtendedSwitchFlowRecord{} |
| 1109 | var fdf SFlowFlowDataFormat |
| 1110 | |
| 1111 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1112 | es.EnterpriseID, es.Format = fdf.decode() |
| 1113 | *data, es.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1114 | *data, es.IncomingVLAN = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1115 | *data, es.IncomingVLANPriority = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1116 | *data, es.OutgoingVLAN = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1117 | *data, es.OutgoingVLANPriority = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1118 | return es, nil |
| 1119 | } |
| 1120 | |
| 1121 | // SFlowExtendedRouterFlowRecord gives additional information |
| 1122 | // about the layer 3 routing information used to forward |
| 1123 | // the packet |
| 1124 | type SFlowExtendedRouterFlowRecord struct { |
| 1125 | SFlowBaseFlowRecord |
| 1126 | NextHop net.IP |
| 1127 | NextHopSourceMask uint32 |
| 1128 | NextHopDestinationMask uint32 |
| 1129 | } |
| 1130 | |
| 1131 | // Extended router records have the following structure: |
| 1132 | |
| 1133 | // 0 15 31 |
| 1134 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1135 | // | 20 bit Interprise (0) |12 bit format | |
| 1136 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1137 | // | record length | |
| 1138 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1139 | // | IP version of next hop router (1=v4|2=v6) | |
| 1140 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1141 | // / Next Hop address (v4=4byte|v6=16byte) / |
| 1142 | // / / |
| 1143 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1144 | // | Next Hop Source Mask | |
| 1145 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1146 | // | Next Hop Destination Mask | |
| 1147 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1148 | |
| 1149 | func decodeExtendedRouterFlowRecord(data *[]byte) (SFlowExtendedRouterFlowRecord, error) { |
| 1150 | er := SFlowExtendedRouterFlowRecord{} |
| 1151 | var fdf SFlowFlowDataFormat |
| 1152 | var extendedRouterAddressType SFlowIPType |
| 1153 | |
| 1154 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1155 | er.EnterpriseID, er.Format = fdf.decode() |
| 1156 | *data, er.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1157 | *data, extendedRouterAddressType = (*data)[4:], SFlowIPType(binary.BigEndian.Uint32((*data)[:4])) |
| 1158 | *data, er.NextHop = (*data)[extendedRouterAddressType.Length():], (*data)[:extendedRouterAddressType.Length()] |
| 1159 | *data, er.NextHopSourceMask = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1160 | *data, er.NextHopDestinationMask = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1161 | return er, nil |
| 1162 | } |
| 1163 | |
| 1164 | // SFlowExtendedGatewayFlowRecord describes information treasured by |
| 1165 | // nework engineers everywhere: AS path information listing which |
| 1166 | // BGP peer sent the packet, and various other BGP related info. |
| 1167 | // This information is vital because it gives a picture of how much |
| 1168 | // traffic is being sent from / received by various BGP peers. |
| 1169 | |
| 1170 | // Extended gateway records have the following structure: |
| 1171 | |
| 1172 | // 0 15 31 |
| 1173 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1174 | // | 20 bit Interprise (0) |12 bit format | |
| 1175 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1176 | // | record length | |
| 1177 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1178 | // | IP version of next hop router (1=v4|2=v6) | |
| 1179 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1180 | // / Next Hop address (v4=4byte|v6=16byte) / |
| 1181 | // / / |
| 1182 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1183 | // | AS | |
| 1184 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1185 | // | Source AS | |
| 1186 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1187 | // | Peer AS | |
| 1188 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1189 | // | AS Path Count | |
| 1190 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1191 | // / AS Path / Sequence / |
| 1192 | // / / |
| 1193 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1194 | // / Communities / |
| 1195 | // / / |
| 1196 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1197 | // | Local Pref | |
| 1198 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1199 | |
| 1200 | // AS Path / Sequence: |
| 1201 | |
| 1202 | // 0 15 31 |
| 1203 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1204 | // | AS Source Type (Path=1 / Sequence=2) | |
| 1205 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1206 | // | Path / Sequence length | |
| 1207 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1208 | // / Path / Sequence Members / |
| 1209 | // / / |
| 1210 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1211 | |
| 1212 | // Communities: |
| 1213 | |
| 1214 | // 0 15 31 |
| 1215 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1216 | // | communitiy length | |
| 1217 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1218 | // / communitiy Members / |
| 1219 | // / / |
| 1220 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1221 | |
| 1222 | type SFlowExtendedGatewayFlowRecord struct { |
| 1223 | SFlowBaseFlowRecord |
| 1224 | NextHop net.IP |
| 1225 | AS uint32 |
| 1226 | SourceAS uint32 |
| 1227 | PeerAS uint32 |
| 1228 | ASPathCount uint32 |
| 1229 | ASPath []SFlowASDestination |
| 1230 | Communities []uint32 |
| 1231 | LocalPref uint32 |
| 1232 | } |
| 1233 | |
| 1234 | type SFlowASPathType uint32 |
| 1235 | |
| 1236 | const ( |
| 1237 | SFlowASSet SFlowASPathType = 1 |
| 1238 | SFlowASSequence SFlowASPathType = 2 |
| 1239 | ) |
| 1240 | |
| 1241 | func (apt SFlowASPathType) String() string { |
| 1242 | switch apt { |
| 1243 | case SFlowASSet: |
| 1244 | return "AS Set" |
| 1245 | case SFlowASSequence: |
| 1246 | return "AS Sequence" |
| 1247 | default: |
| 1248 | return "" |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | type SFlowASDestination struct { |
| 1253 | Type SFlowASPathType |
| 1254 | Count uint32 |
| 1255 | Members []uint32 |
| 1256 | } |
| 1257 | |
| 1258 | func (asd SFlowASDestination) String() string { |
| 1259 | switch asd.Type { |
| 1260 | case SFlowASSet: |
| 1261 | return fmt.Sprint("AS Set:", asd.Members) |
| 1262 | case SFlowASSequence: |
| 1263 | return fmt.Sprint("AS Sequence:", asd.Members) |
| 1264 | default: |
| 1265 | return "" |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | func (ad *SFlowASDestination) decodePath(data *[]byte) { |
| 1270 | *data, ad.Type = (*data)[4:], SFlowASPathType(binary.BigEndian.Uint32((*data)[:4])) |
| 1271 | *data, ad.Count = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1272 | ad.Members = make([]uint32, ad.Count) |
| 1273 | for i := uint32(0); i < ad.Count; i++ { |
| 1274 | var member uint32 |
| 1275 | *data, member = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1276 | ad.Members[i] = member |
| 1277 | } |
| 1278 | } |
| 1279 | |
| 1280 | func decodeExtendedGatewayFlowRecord(data *[]byte) (SFlowExtendedGatewayFlowRecord, error) { |
| 1281 | eg := SFlowExtendedGatewayFlowRecord{} |
| 1282 | var fdf SFlowFlowDataFormat |
| 1283 | var extendedGatewayAddressType SFlowIPType |
| 1284 | var communitiesLength uint32 |
| 1285 | var community uint32 |
| 1286 | |
| 1287 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1288 | eg.EnterpriseID, eg.Format = fdf.decode() |
| 1289 | *data, eg.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1290 | *data, extendedGatewayAddressType = (*data)[4:], SFlowIPType(binary.BigEndian.Uint32((*data)[:4])) |
| 1291 | *data, eg.NextHop = (*data)[extendedGatewayAddressType.Length():], (*data)[:extendedGatewayAddressType.Length()] |
| 1292 | *data, eg.AS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1293 | *data, eg.SourceAS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1294 | *data, eg.PeerAS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1295 | *data, eg.ASPathCount = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1296 | for i := uint32(0); i < eg.ASPathCount; i++ { |
| 1297 | asPath := SFlowASDestination{} |
| 1298 | asPath.decodePath(data) |
| 1299 | eg.ASPath = append(eg.ASPath, asPath) |
| 1300 | } |
| 1301 | *data, communitiesLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1302 | eg.Communities = make([]uint32, communitiesLength) |
| 1303 | for j := uint32(0); j < communitiesLength; j++ { |
| 1304 | *data, community = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1305 | eg.Communities[j] = community |
| 1306 | } |
| 1307 | *data, eg.LocalPref = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1308 | return eg, nil |
| 1309 | } |
| 1310 | |
| 1311 | // ************************************************** |
| 1312 | // Extended URL Flow Record |
| 1313 | // ************************************************** |
| 1314 | |
| 1315 | // 0 15 31 |
| 1316 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1317 | // | 20 bit Interprise (0) |12 bit format | |
| 1318 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1319 | // | record length | |
| 1320 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1321 | // | direction | |
| 1322 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1323 | // | URL | |
| 1324 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1325 | // | Host | |
| 1326 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1327 | |
| 1328 | type SFlowURLDirection uint32 |
| 1329 | |
| 1330 | const ( |
| 1331 | SFlowURLsrc SFlowURLDirection = 1 |
| 1332 | SFlowURLdst SFlowURLDirection = 2 |
| 1333 | ) |
| 1334 | |
| 1335 | func (urld SFlowURLDirection) String() string { |
| 1336 | switch urld { |
| 1337 | case SFlowURLsrc: |
| 1338 | return "Source address is the server" |
| 1339 | case SFlowURLdst: |
| 1340 | return "Destination address is the server" |
| 1341 | default: |
| 1342 | return "" |
| 1343 | } |
| 1344 | } |
| 1345 | |
| 1346 | type SFlowExtendedURLRecord struct { |
| 1347 | SFlowBaseFlowRecord |
| 1348 | Direction SFlowURLDirection |
| 1349 | URL string |
| 1350 | Host string |
| 1351 | } |
| 1352 | |
| 1353 | func decodeExtendedURLRecord(data *[]byte) (SFlowExtendedURLRecord, error) { |
| 1354 | eur := SFlowExtendedURLRecord{} |
| 1355 | var fdf SFlowFlowDataFormat |
| 1356 | var urlLen uint32 |
| 1357 | var urlLenWithPad int |
| 1358 | var hostLen uint32 |
| 1359 | var hostLenWithPad int |
| 1360 | var urlBytes []byte |
| 1361 | var hostBytes []byte |
| 1362 | |
| 1363 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1364 | eur.EnterpriseID, eur.Format = fdf.decode() |
| 1365 | *data, eur.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1366 | *data, eur.Direction = (*data)[4:], SFlowURLDirection(binary.BigEndian.Uint32((*data)[:4])) |
| 1367 | *data, urlLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1368 | urlLenWithPad = int(urlLen + ((4 - urlLen) % 4)) |
| 1369 | *data, urlBytes = (*data)[urlLenWithPad:], (*data)[:urlLenWithPad] |
| 1370 | eur.URL = string(urlBytes[:urlLen]) |
| 1371 | *data, hostLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1372 | hostLenWithPad = int(hostLen + ((4 - hostLen) % 4)) |
| 1373 | *data, hostBytes = (*data)[hostLenWithPad:], (*data)[:hostLenWithPad] |
| 1374 | eur.Host = string(hostBytes[:hostLen]) |
| 1375 | return eur, nil |
| 1376 | } |
| 1377 | |
| 1378 | // ************************************************** |
| 1379 | // Extended User Flow Record |
| 1380 | // ************************************************** |
| 1381 | |
| 1382 | // 0 15 31 |
| 1383 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1384 | // | 20 bit Interprise (0) |12 bit format | |
| 1385 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1386 | // | record length | |
| 1387 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1388 | // | Source Character Set | |
| 1389 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1390 | // | Source User Id | |
| 1391 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1392 | // | Destination Character Set | |
| 1393 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1394 | // | Destination User ID | |
| 1395 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1396 | |
| 1397 | type SFlowExtendedUserFlow struct { |
| 1398 | SFlowBaseFlowRecord |
| 1399 | SourceCharSet SFlowCharSet |
| 1400 | SourceUserID string |
| 1401 | DestinationCharSet SFlowCharSet |
| 1402 | DestinationUserID string |
| 1403 | } |
| 1404 | |
| 1405 | type SFlowCharSet uint32 |
| 1406 | |
| 1407 | const ( |
| 1408 | SFlowCSunknown SFlowCharSet = 2 |
| 1409 | SFlowCSASCII SFlowCharSet = 3 |
| 1410 | SFlowCSISOLatin1 SFlowCharSet = 4 |
| 1411 | SFlowCSISOLatin2 SFlowCharSet = 5 |
| 1412 | SFlowCSISOLatin3 SFlowCharSet = 6 |
| 1413 | SFlowCSISOLatin4 SFlowCharSet = 7 |
| 1414 | SFlowCSISOLatinCyrillic SFlowCharSet = 8 |
| 1415 | SFlowCSISOLatinArabic SFlowCharSet = 9 |
| 1416 | SFlowCSISOLatinGreek SFlowCharSet = 10 |
| 1417 | SFlowCSISOLatinHebrew SFlowCharSet = 11 |
| 1418 | SFlowCSISOLatin5 SFlowCharSet = 12 |
| 1419 | SFlowCSISOLatin6 SFlowCharSet = 13 |
| 1420 | SFlowCSISOTextComm SFlowCharSet = 14 |
| 1421 | SFlowCSHalfWidthKatakana SFlowCharSet = 15 |
| 1422 | SFlowCSJISEncoding SFlowCharSet = 16 |
| 1423 | SFlowCSShiftJIS SFlowCharSet = 17 |
| 1424 | SFlowCSEUCPkdFmtJapanese SFlowCharSet = 18 |
| 1425 | SFlowCSEUCFixWidJapanese SFlowCharSet = 19 |
| 1426 | SFlowCSISO4UnitedKingdom SFlowCharSet = 20 |
| 1427 | SFlowCSISO11SwedishForNames SFlowCharSet = 21 |
| 1428 | SFlowCSISO15Italian SFlowCharSet = 22 |
| 1429 | SFlowCSISO17Spanish SFlowCharSet = 23 |
| 1430 | SFlowCSISO21German SFlowCharSet = 24 |
| 1431 | SFlowCSISO60DanishNorwegian SFlowCharSet = 25 |
| 1432 | SFlowCSISO69French SFlowCharSet = 26 |
| 1433 | SFlowCSISO10646UTF1 SFlowCharSet = 27 |
| 1434 | SFlowCSISO646basic1983 SFlowCharSet = 28 |
| 1435 | SFlowCSINVARIANT SFlowCharSet = 29 |
| 1436 | SFlowCSISO2IntlRefVersion SFlowCharSet = 30 |
| 1437 | SFlowCSNATSSEFI SFlowCharSet = 31 |
| 1438 | SFlowCSNATSSEFIADD SFlowCharSet = 32 |
| 1439 | SFlowCSNATSDANO SFlowCharSet = 33 |
| 1440 | SFlowCSNATSDANOADD SFlowCharSet = 34 |
| 1441 | SFlowCSISO10Swedish SFlowCharSet = 35 |
| 1442 | SFlowCSKSC56011987 SFlowCharSet = 36 |
| 1443 | SFlowCSISO2022KR SFlowCharSet = 37 |
| 1444 | SFlowCSEUCKR SFlowCharSet = 38 |
| 1445 | SFlowCSISO2022JP SFlowCharSet = 39 |
| 1446 | SFlowCSISO2022JP2 SFlowCharSet = 40 |
| 1447 | SFlowCSISO13JISC6220jp SFlowCharSet = 41 |
| 1448 | SFlowCSISO14JISC6220ro SFlowCharSet = 42 |
| 1449 | SFlowCSISO16Portuguese SFlowCharSet = 43 |
| 1450 | SFlowCSISO18Greek7Old SFlowCharSet = 44 |
| 1451 | SFlowCSISO19LatinGreek SFlowCharSet = 45 |
| 1452 | SFlowCSISO25French SFlowCharSet = 46 |
| 1453 | SFlowCSISO27LatinGreek1 SFlowCharSet = 47 |
| 1454 | SFlowCSISO5427Cyrillic SFlowCharSet = 48 |
| 1455 | SFlowCSISO42JISC62261978 SFlowCharSet = 49 |
| 1456 | SFlowCSISO47BSViewdata SFlowCharSet = 50 |
| 1457 | SFlowCSISO49INIS SFlowCharSet = 51 |
| 1458 | SFlowCSISO50INIS8 SFlowCharSet = 52 |
| 1459 | SFlowCSISO51INISCyrillic SFlowCharSet = 53 |
| 1460 | SFlowCSISO54271981 SFlowCharSet = 54 |
| 1461 | SFlowCSISO5428Greek SFlowCharSet = 55 |
| 1462 | SFlowCSISO57GB1988 SFlowCharSet = 56 |
| 1463 | SFlowCSISO58GB231280 SFlowCharSet = 57 |
| 1464 | SFlowCSISO61Norwegian2 SFlowCharSet = 58 |
| 1465 | SFlowCSISO70VideotexSupp1 SFlowCharSet = 59 |
| 1466 | SFlowCSISO84Portuguese2 SFlowCharSet = 60 |
| 1467 | SFlowCSISO85Spanish2 SFlowCharSet = 61 |
| 1468 | SFlowCSISO86Hungarian SFlowCharSet = 62 |
| 1469 | SFlowCSISO87JISX0208 SFlowCharSet = 63 |
| 1470 | SFlowCSISO88Greek7 SFlowCharSet = 64 |
| 1471 | SFlowCSISO89ASMO449 SFlowCharSet = 65 |
| 1472 | SFlowCSISO90 SFlowCharSet = 66 |
| 1473 | SFlowCSISO91JISC62291984a SFlowCharSet = 67 |
| 1474 | SFlowCSISO92JISC62991984b SFlowCharSet = 68 |
| 1475 | SFlowCSISO93JIS62291984badd SFlowCharSet = 69 |
| 1476 | SFlowCSISO94JIS62291984hand SFlowCharSet = 70 |
| 1477 | SFlowCSISO95JIS62291984handadd SFlowCharSet = 71 |
| 1478 | SFlowCSISO96JISC62291984kana SFlowCharSet = 72 |
| 1479 | SFlowCSISO2033 SFlowCharSet = 73 |
| 1480 | SFlowCSISO99NAPLPS SFlowCharSet = 74 |
| 1481 | SFlowCSISO102T617bit SFlowCharSet = 75 |
| 1482 | SFlowCSISO103T618bit SFlowCharSet = 76 |
| 1483 | SFlowCSISO111ECMACyrillic SFlowCharSet = 77 |
| 1484 | SFlowCSa71 SFlowCharSet = 78 |
| 1485 | SFlowCSa72 SFlowCharSet = 79 |
| 1486 | SFlowCSISO123CSAZ24341985gr SFlowCharSet = 80 |
| 1487 | SFlowCSISO88596E SFlowCharSet = 81 |
| 1488 | SFlowCSISO88596I SFlowCharSet = 82 |
| 1489 | SFlowCSISO128T101G2 SFlowCharSet = 83 |
| 1490 | SFlowCSISO88598E SFlowCharSet = 84 |
| 1491 | SFlowCSISO88598I SFlowCharSet = 85 |
| 1492 | SFlowCSISO139CSN369103 SFlowCharSet = 86 |
| 1493 | SFlowCSISO141JUSIB1002 SFlowCharSet = 87 |
| 1494 | SFlowCSISO143IECP271 SFlowCharSet = 88 |
| 1495 | SFlowCSISO146Serbian SFlowCharSet = 89 |
| 1496 | SFlowCSISO147Macedonian SFlowCharSet = 90 |
| 1497 | SFlowCSISO150 SFlowCharSet = 91 |
| 1498 | SFlowCSISO151Cuba SFlowCharSet = 92 |
| 1499 | SFlowCSISO6937Add SFlowCharSet = 93 |
| 1500 | SFlowCSISO153GOST1976874 SFlowCharSet = 94 |
| 1501 | SFlowCSISO8859Supp SFlowCharSet = 95 |
| 1502 | SFlowCSISO10367Box SFlowCharSet = 96 |
| 1503 | SFlowCSISO158Lap SFlowCharSet = 97 |
| 1504 | SFlowCSISO159JISX02121990 SFlowCharSet = 98 |
| 1505 | SFlowCSISO646Danish SFlowCharSet = 99 |
| 1506 | SFlowCSUSDK SFlowCharSet = 100 |
| 1507 | SFlowCSDKUS SFlowCharSet = 101 |
| 1508 | SFlowCSKSC5636 SFlowCharSet = 102 |
| 1509 | SFlowCSUnicode11UTF7 SFlowCharSet = 103 |
| 1510 | SFlowCSISO2022CN SFlowCharSet = 104 |
| 1511 | SFlowCSISO2022CNEXT SFlowCharSet = 105 |
| 1512 | SFlowCSUTF8 SFlowCharSet = 106 |
| 1513 | SFlowCSISO885913 SFlowCharSet = 109 |
| 1514 | SFlowCSISO885914 SFlowCharSet = 110 |
| 1515 | SFlowCSISO885915 SFlowCharSet = 111 |
| 1516 | SFlowCSISO885916 SFlowCharSet = 112 |
| 1517 | SFlowCSGBK SFlowCharSet = 113 |
| 1518 | SFlowCSGB18030 SFlowCharSet = 114 |
| 1519 | SFlowCSOSDEBCDICDF0415 SFlowCharSet = 115 |
| 1520 | SFlowCSOSDEBCDICDF03IRV SFlowCharSet = 116 |
| 1521 | SFlowCSOSDEBCDICDF041 SFlowCharSet = 117 |
| 1522 | SFlowCSISO115481 SFlowCharSet = 118 |
| 1523 | SFlowCSKZ1048 SFlowCharSet = 119 |
| 1524 | SFlowCSUnicode SFlowCharSet = 1000 |
| 1525 | SFlowCSUCS4 SFlowCharSet = 1001 |
| 1526 | SFlowCSUnicodeASCII SFlowCharSet = 1002 |
| 1527 | SFlowCSUnicodeLatin1 SFlowCharSet = 1003 |
| 1528 | SFlowCSUnicodeJapanese SFlowCharSet = 1004 |
| 1529 | SFlowCSUnicodeIBM1261 SFlowCharSet = 1005 |
| 1530 | SFlowCSUnicodeIBM1268 SFlowCharSet = 1006 |
| 1531 | SFlowCSUnicodeIBM1276 SFlowCharSet = 1007 |
| 1532 | SFlowCSUnicodeIBM1264 SFlowCharSet = 1008 |
| 1533 | SFlowCSUnicodeIBM1265 SFlowCharSet = 1009 |
| 1534 | SFlowCSUnicode11 SFlowCharSet = 1010 |
| 1535 | SFlowCSSCSU SFlowCharSet = 1011 |
| 1536 | SFlowCSUTF7 SFlowCharSet = 1012 |
| 1537 | SFlowCSUTF16BE SFlowCharSet = 1013 |
| 1538 | SFlowCSUTF16LE SFlowCharSet = 1014 |
| 1539 | SFlowCSUTF16 SFlowCharSet = 1015 |
| 1540 | SFlowCSCESU8 SFlowCharSet = 1016 |
| 1541 | SFlowCSUTF32 SFlowCharSet = 1017 |
| 1542 | SFlowCSUTF32BE SFlowCharSet = 1018 |
| 1543 | SFlowCSUTF32LE SFlowCharSet = 1019 |
| 1544 | SFlowCSBOCU1 SFlowCharSet = 1020 |
| 1545 | SFlowCSWindows30Latin1 SFlowCharSet = 2000 |
| 1546 | SFlowCSWindows31Latin1 SFlowCharSet = 2001 |
| 1547 | SFlowCSWindows31Latin2 SFlowCharSet = 2002 |
| 1548 | SFlowCSWindows31Latin5 SFlowCharSet = 2003 |
| 1549 | SFlowCSHPRoman8 SFlowCharSet = 2004 |
| 1550 | SFlowCSAdobeStandardEncoding SFlowCharSet = 2005 |
| 1551 | SFlowCSVenturaUS SFlowCharSet = 2006 |
| 1552 | SFlowCSVenturaInternational SFlowCharSet = 2007 |
| 1553 | SFlowCSDECMCS SFlowCharSet = 2008 |
| 1554 | SFlowCSPC850Multilingual SFlowCharSet = 2009 |
| 1555 | SFlowCSPCp852 SFlowCharSet = 2010 |
| 1556 | SFlowCSPC8CodePage437 SFlowCharSet = 2011 |
| 1557 | SFlowCSPC8DanishNorwegian SFlowCharSet = 2012 |
| 1558 | SFlowCSPC862LatinHebrew SFlowCharSet = 2013 |
| 1559 | SFlowCSPC8Turkish SFlowCharSet = 2014 |
| 1560 | SFlowCSIBMSymbols SFlowCharSet = 2015 |
| 1561 | SFlowCSIBMThai SFlowCharSet = 2016 |
| 1562 | SFlowCSHPLegal SFlowCharSet = 2017 |
| 1563 | SFlowCSHPPiFont SFlowCharSet = 2018 |
| 1564 | SFlowCSHPMath8 SFlowCharSet = 2019 |
| 1565 | SFlowCSHPPSMath SFlowCharSet = 2020 |
| 1566 | SFlowCSHPDesktop SFlowCharSet = 2021 |
| 1567 | SFlowCSVenturaMath SFlowCharSet = 2022 |
| 1568 | SFlowCSMicrosoftPublishing SFlowCharSet = 2023 |
| 1569 | SFlowCSWindows31J SFlowCharSet = 2024 |
| 1570 | SFlowCSGB2312 SFlowCharSet = 2025 |
| 1571 | SFlowCSBig5 SFlowCharSet = 2026 |
| 1572 | SFlowCSMacintosh SFlowCharSet = 2027 |
| 1573 | SFlowCSIBM037 SFlowCharSet = 2028 |
| 1574 | SFlowCSIBM038 SFlowCharSet = 2029 |
| 1575 | SFlowCSIBM273 SFlowCharSet = 2030 |
| 1576 | SFlowCSIBM274 SFlowCharSet = 2031 |
| 1577 | SFlowCSIBM275 SFlowCharSet = 2032 |
| 1578 | SFlowCSIBM277 SFlowCharSet = 2033 |
| 1579 | SFlowCSIBM278 SFlowCharSet = 2034 |
| 1580 | SFlowCSIBM280 SFlowCharSet = 2035 |
| 1581 | SFlowCSIBM281 SFlowCharSet = 2036 |
| 1582 | SFlowCSIBM284 SFlowCharSet = 2037 |
| 1583 | SFlowCSIBM285 SFlowCharSet = 2038 |
| 1584 | SFlowCSIBM290 SFlowCharSet = 2039 |
| 1585 | SFlowCSIBM297 SFlowCharSet = 2040 |
| 1586 | SFlowCSIBM420 SFlowCharSet = 2041 |
| 1587 | SFlowCSIBM423 SFlowCharSet = 2042 |
| 1588 | SFlowCSIBM424 SFlowCharSet = 2043 |
| 1589 | SFlowCSIBM500 SFlowCharSet = 2044 |
| 1590 | SFlowCSIBM851 SFlowCharSet = 2045 |
| 1591 | SFlowCSIBM855 SFlowCharSet = 2046 |
| 1592 | SFlowCSIBM857 SFlowCharSet = 2047 |
| 1593 | SFlowCSIBM860 SFlowCharSet = 2048 |
| 1594 | SFlowCSIBM861 SFlowCharSet = 2049 |
| 1595 | SFlowCSIBM863 SFlowCharSet = 2050 |
| 1596 | SFlowCSIBM864 SFlowCharSet = 2051 |
| 1597 | SFlowCSIBM865 SFlowCharSet = 2052 |
| 1598 | SFlowCSIBM868 SFlowCharSet = 2053 |
| 1599 | SFlowCSIBM869 SFlowCharSet = 2054 |
| 1600 | SFlowCSIBM870 SFlowCharSet = 2055 |
| 1601 | SFlowCSIBM871 SFlowCharSet = 2056 |
| 1602 | SFlowCSIBM880 SFlowCharSet = 2057 |
| 1603 | SFlowCSIBM891 SFlowCharSet = 2058 |
| 1604 | SFlowCSIBM903 SFlowCharSet = 2059 |
| 1605 | SFlowCSIBBM904 SFlowCharSet = 2060 |
| 1606 | SFlowCSIBM905 SFlowCharSet = 2061 |
| 1607 | SFlowCSIBM918 SFlowCharSet = 2062 |
| 1608 | SFlowCSIBM1026 SFlowCharSet = 2063 |
| 1609 | SFlowCSIBMEBCDICATDE SFlowCharSet = 2064 |
| 1610 | SFlowCSEBCDICATDEA SFlowCharSet = 2065 |
| 1611 | SFlowCSEBCDICCAFR SFlowCharSet = 2066 |
| 1612 | SFlowCSEBCDICDKNO SFlowCharSet = 2067 |
| 1613 | SFlowCSEBCDICDKNOA SFlowCharSet = 2068 |
| 1614 | SFlowCSEBCDICFISE SFlowCharSet = 2069 |
| 1615 | SFlowCSEBCDICFISEA SFlowCharSet = 2070 |
| 1616 | SFlowCSEBCDICFR SFlowCharSet = 2071 |
| 1617 | SFlowCSEBCDICIT SFlowCharSet = 2072 |
| 1618 | SFlowCSEBCDICPT SFlowCharSet = 2073 |
| 1619 | SFlowCSEBCDICES SFlowCharSet = 2074 |
| 1620 | SFlowCSEBCDICESA SFlowCharSet = 2075 |
| 1621 | SFlowCSEBCDICESS SFlowCharSet = 2076 |
| 1622 | SFlowCSEBCDICUK SFlowCharSet = 2077 |
| 1623 | SFlowCSEBCDICUS SFlowCharSet = 2078 |
| 1624 | SFlowCSUnknown8BiT SFlowCharSet = 2079 |
| 1625 | SFlowCSMnemonic SFlowCharSet = 2080 |
| 1626 | SFlowCSMnem SFlowCharSet = 2081 |
| 1627 | SFlowCSVISCII SFlowCharSet = 2082 |
| 1628 | SFlowCSVIQR SFlowCharSet = 2083 |
| 1629 | SFlowCSKOI8R SFlowCharSet = 2084 |
| 1630 | SFlowCSHZGB2312 SFlowCharSet = 2085 |
| 1631 | SFlowCSIBM866 SFlowCharSet = 2086 |
| 1632 | SFlowCSPC775Baltic SFlowCharSet = 2087 |
| 1633 | SFlowCSKOI8U SFlowCharSet = 2088 |
| 1634 | SFlowCSIBM00858 SFlowCharSet = 2089 |
| 1635 | SFlowCSIBM00924 SFlowCharSet = 2090 |
| 1636 | SFlowCSIBM01140 SFlowCharSet = 2091 |
| 1637 | SFlowCSIBM01141 SFlowCharSet = 2092 |
| 1638 | SFlowCSIBM01142 SFlowCharSet = 2093 |
| 1639 | SFlowCSIBM01143 SFlowCharSet = 2094 |
| 1640 | SFlowCSIBM01144 SFlowCharSet = 2095 |
| 1641 | SFlowCSIBM01145 SFlowCharSet = 2096 |
| 1642 | SFlowCSIBM01146 SFlowCharSet = 2097 |
| 1643 | SFlowCSIBM01147 SFlowCharSet = 2098 |
| 1644 | SFlowCSIBM01148 SFlowCharSet = 2099 |
| 1645 | SFlowCSIBM01149 SFlowCharSet = 2100 |
| 1646 | SFlowCSBig5HKSCS SFlowCharSet = 2101 |
| 1647 | SFlowCSIBM1047 SFlowCharSet = 2102 |
| 1648 | SFlowCSPTCP154 SFlowCharSet = 2103 |
| 1649 | SFlowCSAmiga1251 SFlowCharSet = 2104 |
| 1650 | SFlowCSKOI7switched SFlowCharSet = 2105 |
| 1651 | SFlowCSBRF SFlowCharSet = 2106 |
| 1652 | SFlowCSTSCII SFlowCharSet = 2107 |
| 1653 | SFlowCSCP51932 SFlowCharSet = 2108 |
| 1654 | SFlowCSWindows874 SFlowCharSet = 2109 |
| 1655 | SFlowCSWindows1250 SFlowCharSet = 2250 |
| 1656 | SFlowCSWindows1251 SFlowCharSet = 2251 |
| 1657 | SFlowCSWindows1252 SFlowCharSet = 2252 |
| 1658 | SFlowCSWindows1253 SFlowCharSet = 2253 |
| 1659 | SFlowCSWindows1254 SFlowCharSet = 2254 |
| 1660 | SFlowCSWindows1255 SFlowCharSet = 2255 |
| 1661 | SFlowCSWindows1256 SFlowCharSet = 2256 |
| 1662 | SFlowCSWindows1257 SFlowCharSet = 2257 |
| 1663 | SFlowCSWindows1258 SFlowCharSet = 2258 |
| 1664 | SFlowCSTIS620 SFlowCharSet = 2259 |
| 1665 | SFlowCS50220 SFlowCharSet = 2260 |
| 1666 | SFlowCSreserved SFlowCharSet = 3000 |
| 1667 | ) |
| 1668 | |
| 1669 | func decodeExtendedUserFlow(data *[]byte) (SFlowExtendedUserFlow, error) { |
| 1670 | eu := SFlowExtendedUserFlow{} |
| 1671 | var fdf SFlowFlowDataFormat |
| 1672 | var srcUserLen uint32 |
| 1673 | var srcUserLenWithPad int |
| 1674 | var srcUserBytes []byte |
| 1675 | var dstUserLen uint32 |
| 1676 | var dstUserLenWithPad int |
| 1677 | var dstUserBytes []byte |
| 1678 | |
| 1679 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1680 | eu.EnterpriseID, eu.Format = fdf.decode() |
| 1681 | *data, eu.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1682 | *data, eu.SourceCharSet = (*data)[4:], SFlowCharSet(binary.BigEndian.Uint32((*data)[:4])) |
| 1683 | *data, srcUserLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1684 | srcUserLenWithPad = int(srcUserLen + ((4 - srcUserLen) % 4)) |
| 1685 | *data, srcUserBytes = (*data)[srcUserLenWithPad:], (*data)[:srcUserLenWithPad] |
| 1686 | eu.SourceUserID = string(srcUserBytes[:srcUserLen]) |
| 1687 | *data, eu.DestinationCharSet = (*data)[4:], SFlowCharSet(binary.BigEndian.Uint32((*data)[:4])) |
| 1688 | *data, dstUserLen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1689 | dstUserLenWithPad = int(dstUserLen + ((4 - dstUserLen) % 4)) |
| 1690 | *data, dstUserBytes = (*data)[dstUserLenWithPad:], (*data)[:dstUserLenWithPad] |
| 1691 | eu.DestinationUserID = string(dstUserBytes[:dstUserLen]) |
| 1692 | return eu, nil |
| 1693 | } |
| 1694 | |
| 1695 | // ************************************************** |
| 1696 | // Packet IP version 4 Record |
| 1697 | // ************************************************** |
| 1698 | |
| 1699 | // 0 15 31 |
| 1700 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1701 | // | Length | |
| 1702 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1703 | // | Protocol | |
| 1704 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1705 | // | Source IPv4 | |
| 1706 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1707 | // | Destination IPv4 | |
| 1708 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1709 | // | Source Port | |
| 1710 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1711 | // | Destionation Port | |
| 1712 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1713 | // | TCP Flags | |
| 1714 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1715 | // | TOS | |
| 1716 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1717 | type SFlowIpv4Record struct { |
| 1718 | // The length of the IP packet excluding ower layer encapsulations |
| 1719 | Length uint32 |
| 1720 | // IP Protocol type (for example, TCP = 6, UDP = 17) |
| 1721 | Protocol uint32 |
| 1722 | // Source IP Address |
| 1723 | IPSrc net.IP |
| 1724 | // Destination IP Address |
| 1725 | IPDst net.IP |
| 1726 | // TCP/UDP source port number or equivalent |
| 1727 | PortSrc uint32 |
| 1728 | // TCP/UDP destination port number or equivalent |
| 1729 | PortDst uint32 |
| 1730 | // TCP flags |
| 1731 | TCPFlags uint32 |
| 1732 | // IP type of service |
| 1733 | TOS uint32 |
| 1734 | } |
| 1735 | |
| 1736 | func decodeSFlowIpv4Record(data *[]byte) (SFlowIpv4Record, error) { |
| 1737 | si := SFlowIpv4Record{} |
| 1738 | |
| 1739 | *data, si.Length = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1740 | *data, si.Protocol = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1741 | *data, si.IPSrc = (*data)[4:], net.IP((*data)[:4]) |
| 1742 | *data, si.IPDst = (*data)[4:], net.IP((*data)[:4]) |
| 1743 | *data, si.PortSrc = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1744 | *data, si.PortDst = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1745 | *data, si.TCPFlags = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1746 | *data, si.TOS = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1747 | |
| 1748 | return si, nil |
| 1749 | } |
| 1750 | |
| 1751 | // ************************************************** |
| 1752 | // Packet IP version 6 Record |
| 1753 | // ************************************************** |
| 1754 | |
| 1755 | // 0 15 31 |
| 1756 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1757 | // | Length | |
| 1758 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1759 | // | Protocol | |
| 1760 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1761 | // | Source IPv4 | |
| 1762 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1763 | // | Destination IPv4 | |
| 1764 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1765 | // | Source Port | |
| 1766 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1767 | // | Destionation Port | |
| 1768 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1769 | // | TCP Flags | |
| 1770 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1771 | // | Priority | |
| 1772 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1773 | type SFlowIpv6Record struct { |
| 1774 | // The length of the IP packet excluding ower layer encapsulations |
| 1775 | Length uint32 |
| 1776 | // IP Protocol type (for example, TCP = 6, UDP = 17) |
| 1777 | Protocol uint32 |
| 1778 | // Source IP Address |
| 1779 | IPSrc net.IP |
| 1780 | // Destination IP Address |
| 1781 | IPDst net.IP |
| 1782 | // TCP/UDP source port number or equivalent |
| 1783 | PortSrc uint32 |
| 1784 | // TCP/UDP destination port number or equivalent |
| 1785 | PortDst uint32 |
| 1786 | // TCP flags |
| 1787 | TCPFlags uint32 |
| 1788 | // IP priority |
| 1789 | Priority uint32 |
| 1790 | } |
| 1791 | |
| 1792 | func decodeSFlowIpv6Record(data *[]byte) (SFlowIpv6Record, error) { |
| 1793 | si := SFlowIpv6Record{} |
| 1794 | |
| 1795 | *data, si.Length = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1796 | *data, si.Protocol = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1797 | *data, si.IPSrc = (*data)[16:], net.IP((*data)[:16]) |
| 1798 | *data, si.IPDst = (*data)[16:], net.IP((*data)[:16]) |
| 1799 | *data, si.PortSrc = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1800 | *data, si.PortDst = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1801 | *data, si.TCPFlags = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1802 | *data, si.Priority = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1803 | |
| 1804 | return si, nil |
| 1805 | } |
| 1806 | |
| 1807 | // ************************************************** |
| 1808 | // Extended IPv4 Tunnel Egress |
| 1809 | // ************************************************** |
| 1810 | |
| 1811 | // 0 15 31 |
| 1812 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1813 | // | 20 bit Interprise (0) |12 bit format | |
| 1814 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1815 | // | record length | |
| 1816 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1817 | // / Packet IP version 4 Record / |
| 1818 | // / / |
| 1819 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1820 | type SFlowExtendedIpv4TunnelEgressRecord struct { |
| 1821 | SFlowBaseFlowRecord |
| 1822 | SFlowIpv4Record SFlowIpv4Record |
| 1823 | } |
| 1824 | |
| 1825 | func decodeExtendedIpv4TunnelEgress(data *[]byte) (SFlowExtendedIpv4TunnelEgressRecord, error) { |
| 1826 | rec := SFlowExtendedIpv4TunnelEgressRecord{} |
| 1827 | var fdf SFlowFlowDataFormat |
| 1828 | |
| 1829 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1830 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 1831 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1832 | rec.SFlowIpv4Record, _ = decodeSFlowIpv4Record(data) |
| 1833 | |
| 1834 | return rec, nil |
| 1835 | } |
| 1836 | |
| 1837 | // ************************************************** |
| 1838 | // Extended IPv4 Tunnel Ingress |
| 1839 | // ************************************************** |
| 1840 | |
| 1841 | // 0 15 31 |
| 1842 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1843 | // | 20 bit Interprise (0) |12 bit format | |
| 1844 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1845 | // | record length | |
| 1846 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1847 | // / Packet IP version 4 Record / |
| 1848 | // / / |
| 1849 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1850 | type SFlowExtendedIpv4TunnelIngressRecord struct { |
| 1851 | SFlowBaseFlowRecord |
| 1852 | SFlowIpv4Record SFlowIpv4Record |
| 1853 | } |
| 1854 | |
| 1855 | func decodeExtendedIpv4TunnelIngress(data *[]byte) (SFlowExtendedIpv4TunnelIngressRecord, error) { |
| 1856 | rec := SFlowExtendedIpv4TunnelIngressRecord{} |
| 1857 | var fdf SFlowFlowDataFormat |
| 1858 | |
| 1859 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1860 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 1861 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1862 | rec.SFlowIpv4Record, _ = decodeSFlowIpv4Record(data) |
| 1863 | |
| 1864 | return rec, nil |
| 1865 | } |
| 1866 | |
| 1867 | // ************************************************** |
| 1868 | // Extended IPv6 Tunnel Egress |
| 1869 | // ************************************************** |
| 1870 | |
| 1871 | // 0 15 31 |
| 1872 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1873 | // | 20 bit Interprise (0) |12 bit format | |
| 1874 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1875 | // | record length | |
| 1876 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1877 | // / Packet IP version 6 Record / |
| 1878 | // / / |
| 1879 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1880 | type SFlowExtendedIpv6TunnelEgressRecord struct { |
| 1881 | SFlowBaseFlowRecord |
| 1882 | SFlowIpv6Record |
| 1883 | } |
| 1884 | |
| 1885 | func decodeExtendedIpv6TunnelEgress(data *[]byte) (SFlowExtendedIpv6TunnelEgressRecord, error) { |
| 1886 | rec := SFlowExtendedIpv6TunnelEgressRecord{} |
| 1887 | var fdf SFlowFlowDataFormat |
| 1888 | |
| 1889 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1890 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 1891 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1892 | rec.SFlowIpv6Record, _ = decodeSFlowIpv6Record(data) |
| 1893 | |
| 1894 | return rec, nil |
| 1895 | } |
| 1896 | |
| 1897 | // ************************************************** |
| 1898 | // Extended IPv6 Tunnel Ingress |
| 1899 | // ************************************************** |
| 1900 | |
| 1901 | // 0 15 31 |
| 1902 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1903 | // | 20 bit Interprise (0) |12 bit format | |
| 1904 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1905 | // | record length | |
| 1906 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1907 | // / Packet IP version 6 Record / |
| 1908 | // / / |
| 1909 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1910 | type SFlowExtendedIpv6TunnelIngressRecord struct { |
| 1911 | SFlowBaseFlowRecord |
| 1912 | SFlowIpv6Record |
| 1913 | } |
| 1914 | |
| 1915 | func decodeExtendedIpv6TunnelIngress(data *[]byte) (SFlowExtendedIpv6TunnelIngressRecord, error) { |
| 1916 | rec := SFlowExtendedIpv6TunnelIngressRecord{} |
| 1917 | var fdf SFlowFlowDataFormat |
| 1918 | |
| 1919 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1920 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 1921 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1922 | rec.SFlowIpv6Record, _ = decodeSFlowIpv6Record(data) |
| 1923 | |
| 1924 | return rec, nil |
| 1925 | } |
| 1926 | |
| 1927 | // ************************************************** |
| 1928 | // Extended Decapsulate Egress |
| 1929 | // ************************************************** |
| 1930 | |
| 1931 | // 0 15 31 |
| 1932 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1933 | // | 20 bit Interprise (0) |12 bit format | |
| 1934 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1935 | // | record length | |
| 1936 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1937 | // | Inner Header Offset | |
| 1938 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1939 | type SFlowExtendedDecapsulateEgressRecord struct { |
| 1940 | SFlowBaseFlowRecord |
| 1941 | InnerHeaderOffset uint32 |
| 1942 | } |
| 1943 | |
| 1944 | func decodeExtendedDecapsulateEgress(data *[]byte) (SFlowExtendedDecapsulateEgressRecord, error) { |
| 1945 | rec := SFlowExtendedDecapsulateEgressRecord{} |
| 1946 | var fdf SFlowFlowDataFormat |
| 1947 | |
| 1948 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1949 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 1950 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1951 | *data, rec.InnerHeaderOffset = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1952 | |
| 1953 | return rec, nil |
| 1954 | } |
| 1955 | |
| 1956 | // ************************************************** |
| 1957 | // Extended Decapsulate Ingress |
| 1958 | // ************************************************** |
| 1959 | |
| 1960 | // 0 15 31 |
| 1961 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1962 | // | 20 bit Interprise (0) |12 bit format | |
| 1963 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1964 | // | record length | |
| 1965 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1966 | // | Inner Header Offset | |
| 1967 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1968 | type SFlowExtendedDecapsulateIngressRecord struct { |
| 1969 | SFlowBaseFlowRecord |
| 1970 | InnerHeaderOffset uint32 |
| 1971 | } |
| 1972 | |
| 1973 | func decodeExtendedDecapsulateIngress(data *[]byte) (SFlowExtendedDecapsulateIngressRecord, error) { |
| 1974 | rec := SFlowExtendedDecapsulateIngressRecord{} |
| 1975 | var fdf SFlowFlowDataFormat |
| 1976 | |
| 1977 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 1978 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 1979 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1980 | *data, rec.InnerHeaderOffset = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 1981 | |
| 1982 | return rec, nil |
| 1983 | } |
| 1984 | |
| 1985 | // ************************************************** |
| 1986 | // Extended VNI Egress |
| 1987 | // ************************************************** |
| 1988 | |
| 1989 | // 0 15 31 |
| 1990 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1991 | // | 20 bit Interprise (0) |12 bit format | |
| 1992 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1993 | // | record length | |
| 1994 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1995 | // | VNI | |
| 1996 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 1997 | type SFlowExtendedVniEgressRecord struct { |
| 1998 | SFlowBaseFlowRecord |
| 1999 | VNI uint32 |
| 2000 | } |
| 2001 | |
| 2002 | func decodeExtendedVniEgress(data *[]byte) (SFlowExtendedVniEgressRecord, error) { |
| 2003 | rec := SFlowExtendedVniEgressRecord{} |
| 2004 | var fdf SFlowFlowDataFormat |
| 2005 | |
| 2006 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2007 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 2008 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2009 | *data, rec.VNI = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2010 | |
| 2011 | return rec, nil |
| 2012 | } |
| 2013 | |
| 2014 | // ************************************************** |
| 2015 | // Extended VNI Ingress |
| 2016 | // ************************************************** |
| 2017 | |
| 2018 | // 0 15 31 |
| 2019 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2020 | // | 20 bit Interprise (0) |12 bit format | |
| 2021 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2022 | // | record length | |
| 2023 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2024 | // | VNI | |
| 2025 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2026 | type SFlowExtendedVniIngressRecord struct { |
| 2027 | SFlowBaseFlowRecord |
| 2028 | VNI uint32 |
| 2029 | } |
| 2030 | |
| 2031 | func decodeExtendedVniIngress(data *[]byte) (SFlowExtendedVniIngressRecord, error) { |
| 2032 | rec := SFlowExtendedVniIngressRecord{} |
| 2033 | var fdf SFlowFlowDataFormat |
| 2034 | |
| 2035 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2036 | rec.EnterpriseID, rec.Format = fdf.decode() |
| 2037 | *data, rec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2038 | *data, rec.VNI = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2039 | |
| 2040 | return rec, nil |
| 2041 | } |
| 2042 | |
| 2043 | // ************************************************** |
| 2044 | // Counter Record |
| 2045 | // ************************************************** |
| 2046 | |
| 2047 | // 0 15 31 |
| 2048 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2049 | // | 20 bit Interprise (0) |12 bit format | |
| 2050 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2051 | // | counter length | |
| 2052 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2053 | // / counter data / |
| 2054 | // / / |
| 2055 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2056 | |
| 2057 | type SFlowBaseCounterRecord struct { |
| 2058 | EnterpriseID SFlowEnterpriseID |
| 2059 | Format SFlowCounterRecordType |
| 2060 | FlowDataLength uint32 |
| 2061 | } |
| 2062 | |
| 2063 | func (bcr SFlowBaseCounterRecord) GetType() SFlowCounterRecordType { |
| 2064 | switch bcr.Format { |
| 2065 | case SFlowTypeGenericInterfaceCounters: |
| 2066 | return SFlowTypeGenericInterfaceCounters |
| 2067 | case SFlowTypeEthernetInterfaceCounters: |
| 2068 | return SFlowTypeEthernetInterfaceCounters |
| 2069 | case SFlowTypeTokenRingInterfaceCounters: |
| 2070 | return SFlowTypeTokenRingInterfaceCounters |
| 2071 | case SFlowType100BaseVGInterfaceCounters: |
| 2072 | return SFlowType100BaseVGInterfaceCounters |
| 2073 | case SFlowTypeVLANCounters: |
| 2074 | return SFlowTypeVLANCounters |
| 2075 | case SFlowTypeLACPCounters: |
| 2076 | return SFlowTypeLACPCounters |
| 2077 | case SFlowTypeProcessorCounters: |
| 2078 | return SFlowTypeProcessorCounters |
| 2079 | case SFlowTypeOpenflowPortCounters: |
| 2080 | return SFlowTypeOpenflowPortCounters |
| 2081 | case SFlowTypePORTNAMECounters: |
| 2082 | return SFlowTypePORTNAMECounters |
| 2083 | case SFLowTypeAPPRESOURCESCounters: |
| 2084 | return SFLowTypeAPPRESOURCESCounters |
| 2085 | case SFlowTypeOVSDPCounters: |
| 2086 | return SFlowTypeOVSDPCounters |
| 2087 | } |
| 2088 | unrecognized := fmt.Sprint("Unrecognized counter record type:", bcr.Format) |
| 2089 | panic(unrecognized) |
| 2090 | } |
| 2091 | |
| 2092 | // ************************************************** |
| 2093 | // Counter Record |
| 2094 | // ************************************************** |
| 2095 | |
| 2096 | // 0 15 31 |
| 2097 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2098 | // | 20 bit Interprise (0) |12 bit format | |
| 2099 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2100 | // | counter length | |
| 2101 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2102 | // | IfIndex | |
| 2103 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2104 | // | IfType | |
| 2105 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2106 | // | IfSpeed | |
| 2107 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2108 | // | IfDirection | |
| 2109 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2110 | // | IfStatus | |
| 2111 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2112 | // | IFInOctets | |
| 2113 | // | | |
| 2114 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2115 | // | IfInUcastPkts | |
| 2116 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2117 | // | IfInMulticastPkts | |
| 2118 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2119 | // | IfInBroadcastPkts | |
| 2120 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2121 | // | IfInDiscards | |
| 2122 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2123 | // | InInErrors | |
| 2124 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2125 | // | IfInUnknownProtos | |
| 2126 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2127 | // | IfOutOctets | |
| 2128 | // | | |
| 2129 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2130 | // | IfOutUcastPkts | |
| 2131 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2132 | // | IfOutMulticastPkts | |
| 2133 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2134 | // | IfOutBroadcastPkts | |
| 2135 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2136 | // | IfOutDiscards | |
| 2137 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2138 | // | IfOUtErrors | |
| 2139 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2140 | // | IfPromiscouousMode | |
| 2141 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2142 | |
| 2143 | type SFlowGenericInterfaceCounters struct { |
| 2144 | SFlowBaseCounterRecord |
| 2145 | IfIndex uint32 |
| 2146 | IfType uint32 |
| 2147 | IfSpeed uint64 |
| 2148 | IfDirection uint32 |
| 2149 | IfStatus uint32 |
| 2150 | IfInOctets uint64 |
| 2151 | IfInUcastPkts uint32 |
| 2152 | IfInMulticastPkts uint32 |
| 2153 | IfInBroadcastPkts uint32 |
| 2154 | IfInDiscards uint32 |
| 2155 | IfInErrors uint32 |
| 2156 | IfInUnknownProtos uint32 |
| 2157 | IfOutOctets uint64 |
| 2158 | IfOutUcastPkts uint32 |
| 2159 | IfOutMulticastPkts uint32 |
| 2160 | IfOutBroadcastPkts uint32 |
| 2161 | IfOutDiscards uint32 |
| 2162 | IfOutErrors uint32 |
| 2163 | IfPromiscuousMode uint32 |
| 2164 | } |
| 2165 | |
| 2166 | func decodeGenericInterfaceCounters(data *[]byte) (SFlowGenericInterfaceCounters, error) { |
| 2167 | gic := SFlowGenericInterfaceCounters{} |
| 2168 | var cdf SFlowCounterDataFormat |
| 2169 | |
| 2170 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2171 | gic.EnterpriseID, gic.Format = cdf.decode() |
| 2172 | *data, gic.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2173 | *data, gic.IfIndex = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2174 | *data, gic.IfType = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2175 | *data, gic.IfSpeed = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) |
| 2176 | *data, gic.IfDirection = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2177 | *data, gic.IfStatus = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2178 | *data, gic.IfInOctets = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) |
| 2179 | *data, gic.IfInUcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2180 | *data, gic.IfInMulticastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2181 | *data, gic.IfInBroadcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2182 | *data, gic.IfInDiscards = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2183 | *data, gic.IfInErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2184 | *data, gic.IfInUnknownProtos = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2185 | *data, gic.IfOutOctets = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) |
| 2186 | *data, gic.IfOutUcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2187 | *data, gic.IfOutMulticastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2188 | *data, gic.IfOutBroadcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2189 | *data, gic.IfOutDiscards = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2190 | *data, gic.IfOutErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2191 | *data, gic.IfPromiscuousMode = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2192 | return gic, nil |
| 2193 | } |
| 2194 | |
| 2195 | // ************************************************** |
| 2196 | // Counter Record |
| 2197 | // ************************************************** |
| 2198 | |
| 2199 | // 0 15 31 |
| 2200 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2201 | // | 20 bit Interprise (0) |12 bit format | |
| 2202 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2203 | // | counter length | |
| 2204 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2205 | // / counter data / |
| 2206 | // / / |
| 2207 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2208 | |
| 2209 | type SFlowEthernetCounters struct { |
| 2210 | SFlowBaseCounterRecord |
| 2211 | AlignmentErrors uint32 |
| 2212 | FCSErrors uint32 |
| 2213 | SingleCollisionFrames uint32 |
| 2214 | MultipleCollisionFrames uint32 |
| 2215 | SQETestErrors uint32 |
| 2216 | DeferredTransmissions uint32 |
| 2217 | LateCollisions uint32 |
| 2218 | ExcessiveCollisions uint32 |
| 2219 | InternalMacTransmitErrors uint32 |
| 2220 | CarrierSenseErrors uint32 |
| 2221 | FrameTooLongs uint32 |
| 2222 | InternalMacReceiveErrors uint32 |
| 2223 | SymbolErrors uint32 |
| 2224 | } |
| 2225 | |
| 2226 | func decodeEthernetCounters(data *[]byte) (SFlowEthernetCounters, error) { |
| 2227 | ec := SFlowEthernetCounters{} |
| 2228 | var cdf SFlowCounterDataFormat |
| 2229 | |
| 2230 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2231 | ec.EnterpriseID, ec.Format = cdf.decode() |
| 2232 | if len(*data) < 4 { |
| 2233 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2234 | } |
| 2235 | *data, ec.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2236 | if len(*data) < 4 { |
| 2237 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2238 | } |
| 2239 | *data, ec.AlignmentErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2240 | if len(*data) < 4 { |
| 2241 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2242 | } |
| 2243 | *data, ec.FCSErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2244 | if len(*data) < 4 { |
| 2245 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2246 | } |
| 2247 | *data, ec.SingleCollisionFrames = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2248 | if len(*data) < 4 { |
| 2249 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2250 | } |
| 2251 | *data, ec.MultipleCollisionFrames = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2252 | if len(*data) < 4 { |
| 2253 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2254 | } |
| 2255 | *data, ec.SQETestErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2256 | if len(*data) < 4 { |
| 2257 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2258 | } |
| 2259 | *data, ec.DeferredTransmissions = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2260 | if len(*data) < 4 { |
| 2261 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2262 | } |
| 2263 | *data, ec.LateCollisions = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2264 | if len(*data) < 4 { |
| 2265 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2266 | } |
| 2267 | *data, ec.ExcessiveCollisions = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2268 | if len(*data) < 4 { |
| 2269 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2270 | } |
| 2271 | *data, ec.InternalMacTransmitErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2272 | if len(*data) < 4 { |
| 2273 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2274 | } |
| 2275 | *data, ec.CarrierSenseErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2276 | if len(*data) < 4 { |
| 2277 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2278 | } |
| 2279 | *data, ec.FrameTooLongs = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2280 | if len(*data) < 4 { |
| 2281 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2282 | } |
| 2283 | *data, ec.InternalMacReceiveErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2284 | if len(*data) < 4 { |
| 2285 | return SFlowEthernetCounters{}, errors.New("ethernet counters too small") |
| 2286 | } |
| 2287 | *data, ec.SymbolErrors = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2288 | return ec, nil |
| 2289 | } |
| 2290 | |
| 2291 | // VLAN Counter |
| 2292 | |
| 2293 | type SFlowVLANCounters struct { |
| 2294 | SFlowBaseCounterRecord |
| 2295 | VlanID uint32 |
| 2296 | Octets uint64 |
| 2297 | UcastPkts uint32 |
| 2298 | MulticastPkts uint32 |
| 2299 | BroadcastPkts uint32 |
| 2300 | Discards uint32 |
| 2301 | } |
| 2302 | |
| 2303 | func decodeVLANCounters(data *[]byte) (SFlowVLANCounters, error) { |
| 2304 | vc := SFlowVLANCounters{} |
| 2305 | var cdf SFlowCounterDataFormat |
| 2306 | |
| 2307 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2308 | vc.EnterpriseID, vc.Format = cdf.decode() |
| 2309 | vc.EnterpriseID, vc.Format = cdf.decode() |
| 2310 | *data, vc.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2311 | *data, vc.VlanID = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2312 | *data, vc.Octets = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) |
| 2313 | *data, vc.UcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2314 | *data, vc.MulticastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2315 | *data, vc.BroadcastPkts = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2316 | *data, vc.Discards = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2317 | return vc, nil |
| 2318 | } |
| 2319 | |
| 2320 | //SFLLACPportState : SFlow LACP Port State (All(4) - 32 bit) |
| 2321 | type SFLLACPPortState struct { |
| 2322 | PortStateAll uint32 |
| 2323 | } |
| 2324 | |
| 2325 | //LACPcounters : LACP SFlow Counters ( 64 Bytes ) |
| 2326 | type SFlowLACPCounters struct { |
| 2327 | SFlowBaseCounterRecord |
| 2328 | ActorSystemID net.HardwareAddr |
| 2329 | PartnerSystemID net.HardwareAddr |
| 2330 | AttachedAggID uint32 |
| 2331 | LacpPortState SFLLACPPortState |
| 2332 | LACPDUsRx uint32 |
| 2333 | MarkerPDUsRx uint32 |
| 2334 | MarkerResponsePDUsRx uint32 |
| 2335 | UnknownRx uint32 |
| 2336 | IllegalRx uint32 |
| 2337 | LACPDUsTx uint32 |
| 2338 | MarkerPDUsTx uint32 |
| 2339 | MarkerResponsePDUsTx uint32 |
| 2340 | } |
| 2341 | |
| 2342 | func decodeLACPCounters(data *[]byte) (SFlowLACPCounters, error) { |
| 2343 | la := SFlowLACPCounters{} |
| 2344 | var cdf SFlowCounterDataFormat |
| 2345 | |
| 2346 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2347 | la.EnterpriseID, la.Format = cdf.decode() |
| 2348 | *data, la.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2349 | *data, la.ActorSystemID = (*data)[6:], (*data)[:6] |
| 2350 | *data = (*data)[2:] // remove padding |
| 2351 | *data, la.PartnerSystemID = (*data)[6:], (*data)[:6] |
| 2352 | *data = (*data)[2:] //remove padding |
| 2353 | *data, la.AttachedAggID = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2354 | *data, la.LacpPortState.PortStateAll = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2355 | *data, la.LACPDUsRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2356 | *data, la.MarkerPDUsRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2357 | *data, la.MarkerResponsePDUsRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2358 | *data, la.UnknownRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2359 | *data, la.IllegalRx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2360 | *data, la.LACPDUsTx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2361 | *data, la.MarkerPDUsTx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2362 | *data, la.MarkerResponsePDUsTx = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2363 | |
| 2364 | return la, nil |
| 2365 | |
| 2366 | } |
| 2367 | |
| 2368 | // ************************************************** |
| 2369 | // Processor Counter Record |
| 2370 | // ************************************************** |
| 2371 | // 0 15 31 |
| 2372 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2373 | // | 20 bit Interprise (0) |12 bit format | |
| 2374 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2375 | // | counter length | |
| 2376 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2377 | // | FiveSecCpu | |
| 2378 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2379 | // | OneMinCpu | |
| 2380 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2381 | // | GiveMinCpu | |
| 2382 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2383 | // | TotalMemory | |
| 2384 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2385 | // | FreeMemory | |
| 2386 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2387 | |
| 2388 | type SFlowProcessorCounters struct { |
| 2389 | SFlowBaseCounterRecord |
| 2390 | FiveSecCpu uint32 // 5 second average CPU utilization |
| 2391 | OneMinCpu uint32 // 1 minute average CPU utilization |
| 2392 | FiveMinCpu uint32 // 5 minute average CPU utilization |
| 2393 | TotalMemory uint64 // total memory (in bytes) |
| 2394 | FreeMemory uint64 // free memory (in bytes) |
| 2395 | } |
| 2396 | |
| 2397 | func decodeProcessorCounters(data *[]byte) (SFlowProcessorCounters, error) { |
| 2398 | pc := SFlowProcessorCounters{} |
| 2399 | var cdf SFlowCounterDataFormat |
| 2400 | var high32, low32 uint32 |
| 2401 | |
| 2402 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2403 | pc.EnterpriseID, pc.Format = cdf.decode() |
| 2404 | *data, pc.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2405 | |
| 2406 | *data, pc.FiveSecCpu = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2407 | *data, pc.OneMinCpu = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2408 | *data, pc.FiveMinCpu = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2409 | *data, high32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2410 | *data, low32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2411 | pc.TotalMemory = (uint64(high32) << 32) + uint64(low32) |
| 2412 | *data, high32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2413 | *data, low32 = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2414 | pc.FreeMemory = (uint64(high32)) + uint64(low32) |
| 2415 | |
| 2416 | return pc, nil |
| 2417 | } |
| 2418 | |
| 2419 | // SFlowEthernetFrameFlowRecord give additional information |
| 2420 | // about the sampled packet if it's available. |
| 2421 | // An agent may or may not provide this information. |
| 2422 | type SFlowEthernetFrameFlowRecord struct { |
| 2423 | SFlowBaseFlowRecord |
| 2424 | FrameLength uint32 |
| 2425 | SrcMac net.HardwareAddr |
| 2426 | DstMac net.HardwareAddr |
| 2427 | Type uint32 |
| 2428 | } |
| 2429 | |
| 2430 | // Ethernet frame flow records have the following structure: |
| 2431 | |
| 2432 | // 0 15 31 |
| 2433 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2434 | // | 20 bit Interprise (0) |12 bit format | |
| 2435 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2436 | // | record length | |
| 2437 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2438 | // | Source Mac Address | |
| 2439 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2440 | // | Destination Mac Address | |
| 2441 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2442 | // | Ethernet Packet Type | |
| 2443 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 2444 | |
| 2445 | func decodeEthernetFrameFlowRecord(data *[]byte) (SFlowEthernetFrameFlowRecord, error) { |
| 2446 | es := SFlowEthernetFrameFlowRecord{} |
| 2447 | var fdf SFlowFlowDataFormat |
| 2448 | |
| 2449 | *data, fdf = (*data)[4:], SFlowFlowDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2450 | es.EnterpriseID, es.Format = fdf.decode() |
| 2451 | *data, es.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2452 | |
| 2453 | *data, es.FrameLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2454 | *data, es.SrcMac = (*data)[8:], net.HardwareAddr((*data)[:6]) |
| 2455 | *data, es.DstMac = (*data)[8:], net.HardwareAddr((*data)[:6]) |
| 2456 | *data, es.Type = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2457 | return es, nil |
| 2458 | } |
| 2459 | |
| 2460 | //SFlowOpenflowPortCounters : OVS-Sflow OpenFlow Port Counter ( 20 Bytes ) |
| 2461 | type SFlowOpenflowPortCounters struct { |
| 2462 | SFlowBaseCounterRecord |
| 2463 | DatapathID uint64 |
| 2464 | PortNo uint32 |
| 2465 | } |
| 2466 | |
| 2467 | func decodeOpenflowportCounters(data *[]byte) (SFlowOpenflowPortCounters, error) { |
| 2468 | ofp := SFlowOpenflowPortCounters{} |
| 2469 | var cdf SFlowCounterDataFormat |
| 2470 | |
| 2471 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2472 | ofp.EnterpriseID, ofp.Format = cdf.decode() |
| 2473 | *data, ofp.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2474 | *data, ofp.DatapathID = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) |
| 2475 | *data, ofp.PortNo = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2476 | |
| 2477 | return ofp, nil |
| 2478 | } |
| 2479 | |
| 2480 | //SFlowAppresourcesCounters : OVS_Sflow App Resources Counter ( 48 Bytes ) |
| 2481 | type SFlowAppresourcesCounters struct { |
| 2482 | SFlowBaseCounterRecord |
| 2483 | UserTime uint32 |
| 2484 | SystemTime uint32 |
| 2485 | MemUsed uint64 |
| 2486 | MemMax uint64 |
| 2487 | FdOpen uint32 |
| 2488 | FdMax uint32 |
| 2489 | ConnOpen uint32 |
| 2490 | ConnMax uint32 |
| 2491 | } |
| 2492 | |
| 2493 | func decodeAppresourcesCounters(data *[]byte) (SFlowAppresourcesCounters, error) { |
| 2494 | app := SFlowAppresourcesCounters{} |
| 2495 | var cdf SFlowCounterDataFormat |
| 2496 | |
| 2497 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2498 | app.EnterpriseID, app.Format = cdf.decode() |
| 2499 | *data, app.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2500 | *data, app.UserTime = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2501 | *data, app.SystemTime = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2502 | *data, app.MemUsed = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) |
| 2503 | *data, app.MemMax = (*data)[8:], binary.BigEndian.Uint64((*data)[:8]) |
| 2504 | *data, app.FdOpen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2505 | *data, app.FdMax = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2506 | *data, app.ConnOpen = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2507 | *data, app.ConnMax = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2508 | |
| 2509 | return app, nil |
| 2510 | } |
| 2511 | |
| 2512 | //SFlowOVSDPCounters : OVS-Sflow DataPath Counter ( 32 Bytes ) |
| 2513 | type SFlowOVSDPCounters struct { |
| 2514 | SFlowBaseCounterRecord |
| 2515 | NHit uint32 |
| 2516 | NMissed uint32 |
| 2517 | NLost uint32 |
| 2518 | NMaskHit uint32 |
| 2519 | NFlows uint32 |
| 2520 | NMasks uint32 |
| 2521 | } |
| 2522 | |
| 2523 | func decodeOVSDPCounters(data *[]byte) (SFlowOVSDPCounters, error) { |
| 2524 | dp := SFlowOVSDPCounters{} |
| 2525 | var cdf SFlowCounterDataFormat |
| 2526 | |
| 2527 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2528 | dp.EnterpriseID, dp.Format = cdf.decode() |
| 2529 | *data, dp.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2530 | *data, dp.NHit = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2531 | *data, dp.NMissed = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2532 | *data, dp.NLost = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2533 | *data, dp.NMaskHit = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2534 | *data, dp.NFlows = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2535 | *data, dp.NMasks = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2536 | |
| 2537 | return dp, nil |
| 2538 | } |
| 2539 | |
| 2540 | //SFlowPORTNAME : OVS-Sflow PORTNAME Counter Sampletype ( 20 Bytes ) |
| 2541 | type SFlowPORTNAME struct { |
| 2542 | SFlowBaseCounterRecord |
| 2543 | Len uint32 |
| 2544 | Str string |
| 2545 | } |
| 2546 | |
| 2547 | func decodeString(data *[]byte) (len uint32, str string) { |
| 2548 | *data, len = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2549 | str = string((*data)[:len]) |
| 2550 | if (len % 4) != 0 { |
| 2551 | len += 4 - len%4 |
| 2552 | } |
| 2553 | *data = (*data)[len:] |
| 2554 | return |
| 2555 | } |
| 2556 | |
| 2557 | func decodePortnameCounters(data *[]byte) (SFlowPORTNAME, error) { |
| 2558 | pn := SFlowPORTNAME{} |
| 2559 | var cdf SFlowCounterDataFormat |
| 2560 | |
| 2561 | *data, cdf = (*data)[4:], SFlowCounterDataFormat(binary.BigEndian.Uint32((*data)[:4])) |
| 2562 | pn.EnterpriseID, pn.Format = cdf.decode() |
| 2563 | *data, pn.FlowDataLength = (*data)[4:], binary.BigEndian.Uint32((*data)[:4]) |
| 2564 | pn.Len, pn.Str = decodeString(data) |
| 2565 | |
| 2566 | return pn, nil |
| 2567 | } |