Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018 - present. Boling Consulting Solutions (bcsw.net) |
| 3 | * Copyright 2020-present Open Networking Foundation |
| 4 | |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
Girish Gowdra | 161d27a | 2021-05-05 12:01:44 -0700 | [diff] [blame] | 17 | /* |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 18 | * NOTE: This file was generated, manual edits will be overwritten! |
| 19 | * |
| 20 | * Generated by 'goCodeGenerator.py': |
| 21 | * https://github.com/cboling/OMCI-parser/README.md |
| 22 | */ |
| 23 | |
| 24 | package generated |
| 25 | |
| 26 | import ( |
| 27 | "encoding/base64" |
| 28 | "encoding/binary" |
| 29 | "errors" |
| 30 | "fmt" |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 31 | "reflect" |
| 32 | "sort" |
| 33 | "strings" |
Girish Gowdra | 161d27a | 2021-05-05 12:01:44 -0700 | [diff] [blame] | 34 | |
| 35 | mapset "github.com/deckarep/golang-set" |
| 36 | "github.com/google/gopacket" |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 37 | ) |
| 38 | |
| 39 | // Attribute types |
| 40 | type AttributeType uint8 |
| 41 | |
| 42 | const ( |
| 43 | UnknownAttributeType AttributeType = iota // Not known |
| 44 | OctetsAttributeType // Series of zero or more octets |
| 45 | StringAttributeType // Readable String |
| 46 | UnsignedIntegerAttributeType // Integer (0..max) |
| 47 | TableAttributeType // Table (of Octets) |
| 48 | SignedIntegerAttributeType // Signed integer, often expressed as 2's complement |
| 49 | PointerAttributeType // Managed Entity ID or pointer to a Managed instance |
| 50 | BitFieldAttributeType // Bitfield |
| 51 | EnumerationAttributeType // Fixed number of values (Unsigned Integers) |
| 52 | CounterAttributeType // Incrementing counter |
| 53 | ) |
| 54 | |
Andrea Campanella | 10426e2 | 2021-10-15 17:58:04 +0200 | [diff] [blame] | 55 | // AttributeDefinitionMap is a map of attribute definitions with the attribute index (0..16) |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 56 | // as the key |
| 57 | type AttributeDefinitionMap map[uint]AttributeDefinition |
| 58 | |
| 59 | // AttributeDefinition defines a single specific Managed Entity's attributes |
| 60 | type AttributeDefinition struct { |
| 61 | Name string |
| 62 | AttributeType AttributeType |
| 63 | Index uint |
| 64 | Mask uint16 |
| 65 | DefValue interface{} |
| 66 | Size int // Size of attribute in bytes. 0 indicates variable/unknown |
| 67 | Access mapset.Set // AttributeAccess... |
| 68 | Constraint func(interface{}) *ParamError |
| 69 | Avc bool // If true, an AVC notification can occur for the attribute |
| 70 | Tca bool // If true, a threshold crossing alert alarm notification can occur for the attribute |
| 71 | Optional bool // If true, attribute is option, else mandatory |
| 72 | Deprecated bool // If true, attribute is deprecated |
| 73 | } |
| 74 | |
Andrea Campanella | 10426e2 | 2021-10-15 17:58:04 +0200 | [diff] [blame] | 75 | // TableRows is used by the SetTable request/response |
| 76 | type TableRows struct { |
| 77 | NumRows int // Number of rows of 'AttributeDefinition.Size' length |
| 78 | Rows []byte // 0..NumRows rows of attribute data of size 'AttributeDefinition.Size' |
| 79 | } |
| 80 | |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 81 | func (attr *AttributeDefinition) String() string { |
| 82 | return fmt.Sprintf("AttributeDefinition: %v (%v/%v): Size: %v, Default: %v, Access: %v", |
| 83 | attr.GetName(), attr.AttributeType, attr.GetIndex(), attr.GetSize(), attr.GetDefault(), attr.GetAccess()) |
| 84 | } |
| 85 | |
| 86 | // GetName returns the attribute's name |
| 87 | func (attr AttributeDefinition) GetName() string { return attr.Name } |
| 88 | |
Andrea Campanella | 10426e2 | 2021-10-15 17:58:04 +0200 | [diff] [blame] | 89 | // GetIndex returns the attribute index )0..16) |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 90 | func (attr AttributeDefinition) GetIndex() uint { return attr.Index } |
| 91 | |
| 92 | // GetDefault provides the default value for an attribute if not specified |
| 93 | // during its creation |
| 94 | func (attr AttributeDefinition) GetDefault() interface{} { return attr.DefValue } |
| 95 | |
| 96 | // GetSize returns the size of the attribute. For table attributes, the size is |
| 97 | // the size of a single table. |
| 98 | func (attr AttributeDefinition) GetSize() int { return attr.Size } |
| 99 | |
| 100 | // GetAccess provides the access information (Read, Write, ...) |
| 101 | func (attr AttributeDefinition) GetAccess() mapset.Set { return attr.Access } |
| 102 | |
| 103 | // GetConstraints returns a function that can be called for the attribute |
| 104 | // that will validate the value. An appropriate error is returned if the |
| 105 | // constraint fails, otherwise nil is returned to indicate that the value |
| 106 | // is valid. |
| 107 | func (attr AttributeDefinition) GetConstraints() func(interface{}) *ParamError { |
| 108 | return attr.Constraint |
| 109 | } |
| 110 | |
| 111 | // IsTableAttribute returns true if the attribute is a table |
| 112 | func (attr AttributeDefinition) IsTableAttribute() bool { |
| 113 | return attr.AttributeType == TableAttributeType |
| 114 | } |
| 115 | |
| 116 | // IsCounter returns true if the attribute is a counter (usually expressed as an |
| 117 | // unsigned integer) |
| 118 | func (attr AttributeDefinition) IsCounter() bool { |
| 119 | return attr.AttributeType == CounterAttributeType |
| 120 | } |
| 121 | |
| 122 | // IsBitField returns true if the attribute is a bitfield |
| 123 | func (attr AttributeDefinition) IsBitField() bool { |
| 124 | return attr.AttributeType == BitFieldAttributeType |
| 125 | } |
| 126 | |
| 127 | // IsString returns true if the attribute is a string. Strings are typically encoded |
| 128 | // into fixed length files and padded with 0's |
| 129 | func (attr AttributeDefinition) IsString() bool { |
| 130 | return attr.AttributeType == StringAttributeType |
| 131 | } |
| 132 | |
| 133 | // Decode takes a slice of bytes and converts them into a value appropriate for |
| 134 | // the attribute, or returns an error on failure |
| 135 | func (attr *AttributeDefinition) Decode(data []byte, df gopacket.DecodeFeedback, msgType byte) (interface{}, error) { |
| 136 | if attr.IsTableAttribute() { |
| 137 | value, err := attr.tableAttributeDecode(data, df, msgType) |
| 138 | if err != nil { |
| 139 | return nil, err |
| 140 | } |
| 141 | if attr.GetConstraints() != nil { |
| 142 | if omciErr := attr.GetConstraints()(value); omciErr != nil { |
| 143 | return nil, omciErr.GetError() |
| 144 | } |
| 145 | } |
| 146 | return value, nil |
| 147 | } |
| 148 | size := attr.GetSize() |
| 149 | |
| 150 | if len(data) < size { |
| 151 | df.SetTruncated() |
| 152 | return nil, NewMessageTruncatedError("packet too small for field") |
| 153 | } |
| 154 | switch attr.AttributeType { |
| 155 | case StringAttributeType, OctetsAttributeType, UnknownAttributeType: |
| 156 | value := make([]byte, size) |
| 157 | copy(value, data[:size]) |
| 158 | if attr.GetConstraints() != nil { |
| 159 | if omciErr := attr.GetConstraints()(value); omciErr != nil { |
| 160 | return nil, omciErr.GetError() |
| 161 | } |
| 162 | } |
| 163 | return value, nil |
| 164 | |
| 165 | default: |
| 166 | switch attr.GetSize() { |
| 167 | default: |
| 168 | value := make([]byte, size) |
| 169 | copy(value, data[:size]) |
| 170 | if attr.GetConstraints() != nil { |
| 171 | if omciErr := attr.GetConstraints()(value); omciErr != nil { |
| 172 | return nil, omciErr.GetError() |
| 173 | } |
| 174 | } |
| 175 | return value, nil |
| 176 | case 1: |
| 177 | value := data[0] |
| 178 | if attr.GetConstraints() != nil { |
| 179 | if omciErr := attr.GetConstraints()(value); omciErr != nil { |
| 180 | return nil, omciErr.GetError() |
| 181 | } |
| 182 | } |
| 183 | return value, nil |
| 184 | case 2: |
| 185 | value := binary.BigEndian.Uint16(data[0:2]) |
| 186 | if attr.GetConstraints() != nil { |
| 187 | if omciErr := attr.GetConstraints()(value); omciErr != nil { |
| 188 | return nil, omciErr.GetError() |
| 189 | } |
| 190 | } |
| 191 | return value, nil |
| 192 | case 4: |
| 193 | value := binary.BigEndian.Uint32(data[0:4]) |
| 194 | if attr.GetConstraints() != nil { |
| 195 | if omciErr := attr.GetConstraints()(value); omciErr != nil { |
| 196 | return nil, omciErr.GetError() |
| 197 | } |
| 198 | } |
| 199 | return value, nil |
| 200 | case 8: |
| 201 | value := binary.BigEndian.Uint64(data[0:8]) |
| 202 | if attr.GetConstraints() != nil { |
| 203 | omciErr := attr.GetConstraints()(value) |
| 204 | if omciErr != nil { |
| 205 | return nil, omciErr.GetError() |
| 206 | } |
| 207 | } |
| 208 | return value, nil |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | // IOctetStream interface defines a way to convert a custom type to/from an octet |
| 214 | // stream. |
| 215 | type IOctetStream interface { |
| 216 | ToOctetString() ([]byte, error) |
| 217 | FromOctetString([]byte) (interface{}, error) |
| 218 | } |
| 219 | |
| 220 | // InterfaceToOctets converts an attribute value to a string of octets |
| 221 | func InterfaceToOctets(input interface{}) ([]byte, error) { |
| 222 | switch values := input.(type) { |
| 223 | case []byte: |
| 224 | return values, nil |
| 225 | |
| 226 | case []uint16: |
| 227 | stream := make([]byte, 2*len(values)) |
| 228 | for index, value := range values { |
| 229 | binary.BigEndian.PutUint16(stream[index*2:], value) |
| 230 | } |
| 231 | return stream, nil |
| 232 | |
| 233 | case []uint32: |
| 234 | stream := make([]byte, 4*len(values)) |
| 235 | for index, value := range values { |
| 236 | binary.BigEndian.PutUint32(stream[index*4:], value) |
| 237 | } |
| 238 | return stream, nil |
| 239 | |
| 240 | case []uint64: |
| 241 | stream := make([]byte, 8*len(values)) |
| 242 | for index, value := range values { |
| 243 | binary.BigEndian.PutUint64(stream[index*8:], value) |
| 244 | } |
| 245 | return stream, nil |
| 246 | |
| 247 | case IOctetStream: |
| 248 | return values.ToOctetString() |
| 249 | |
| 250 | default: |
| 251 | var typeName string |
| 252 | if t := reflect.TypeOf(input); t.Kind() == reflect.Ptr { |
| 253 | typeName = "*" + t.Elem().Name() |
| 254 | } else { |
| 255 | typeName = t.Name() |
| 256 | } |
| 257 | return nil, fmt.Errorf("unable to convert input to octet string: %v", typeName) |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | // SerializeTo takes an attribute value and converts it to a slice of bytes ready |
| 262 | // for transmission |
| 263 | func (attr *AttributeDefinition) SerializeTo(value interface{}, b gopacket.SerializeBuffer, |
| 264 | msgType byte, bytesAvailable int) (int, error) { |
| 265 | if attr.IsTableAttribute() { |
| 266 | return attr.tableAttributeSerializeTo(value, b, msgType, bytesAvailable) |
| 267 | } |
| 268 | if value == nil { |
| 269 | return 0, fmt.Errorf("attribute: %v is nil", attr.Name) |
| 270 | } |
| 271 | size := attr.GetSize() |
| 272 | if bytesAvailable < size { |
| 273 | return 0, NewMessageTruncatedError(fmt.Sprintf("not enough space for attribute: %v", attr.Name)) |
| 274 | } |
| 275 | bytes, err := b.AppendBytes(size) |
| 276 | if err != nil { |
| 277 | return 0, err |
| 278 | } |
| 279 | switch attr.AttributeType { |
| 280 | case StringAttributeType, OctetsAttributeType, UnknownAttributeType: |
| 281 | byteStream, err := InterfaceToOctets(value) |
| 282 | if err != nil { |
| 283 | return 0, err |
| 284 | } |
| 285 | copy(bytes, byteStream) |
| 286 | |
| 287 | default: |
| 288 | switch size { |
| 289 | default: |
| 290 | byteStream, err := InterfaceToOctets(value) |
| 291 | if err != nil { |
| 292 | return 0, err |
| 293 | } |
| 294 | copy(bytes, byteStream) |
| 295 | case 1: |
| 296 | switch value.(type) { |
| 297 | case int: |
| 298 | bytes[0] = byte(value.(int)) |
| 299 | default: |
| 300 | bytes[0] = value.(byte) |
| 301 | } |
| 302 | case 2: |
| 303 | switch value.(type) { |
| 304 | case int: |
| 305 | binary.BigEndian.PutUint16(bytes, uint16(value.(int))) |
| 306 | default: |
| 307 | binary.BigEndian.PutUint16(bytes, value.(uint16)) |
| 308 | } |
| 309 | case 4: |
| 310 | switch value.(type) { |
| 311 | case int: |
| 312 | binary.BigEndian.PutUint32(bytes, uint32(value.(int))) |
| 313 | default: |
| 314 | binary.BigEndian.PutUint32(bytes, value.(uint32)) |
| 315 | } |
| 316 | case 8: |
| 317 | switch value.(type) { |
| 318 | case int: |
| 319 | binary.BigEndian.PutUint64(bytes, uint64(value.(int))) |
| 320 | default: |
| 321 | binary.BigEndian.PutUint64(bytes, value.(uint64)) |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | return size, nil |
| 326 | } |
| 327 | |
| 328 | // BufferToTableAttributes takes the reconstructed octet buffer transmitted for |
| 329 | // a table attribute (over many GetNextResponses) and converts it into the desired |
| 330 | // format for each table row |
| 331 | func (attr *AttributeDefinition) BufferToTableAttributes(data []byte) (interface{}, error) { |
| 332 | // Source is network byte order octets. Convert to proper array of slices |
| 333 | rowSize := attr.GetSize() |
| 334 | dataSize := len(data) |
| 335 | index := 0 |
| 336 | |
| 337 | switch rowSize { |
| 338 | default: |
| 339 | value := make([][]byte, dataSize/rowSize) |
| 340 | for offset := 0; offset < dataSize; offset += rowSize { |
| 341 | value[index] = make([]byte, rowSize) |
| 342 | copy(value[index], data[offset:]) |
| 343 | index++ |
| 344 | } |
| 345 | return value, nil |
| 346 | case 1: |
| 347 | value := make([]byte, dataSize) |
| 348 | copy(value, data) |
| 349 | return value, nil |
| 350 | case 2: |
| 351 | value := make([]uint16, dataSize/2) |
| 352 | for offset := 0; offset < dataSize; offset += rowSize { |
| 353 | value[offset] = binary.BigEndian.Uint16(data[offset:]) |
| 354 | index++ |
| 355 | } |
| 356 | return value, nil |
| 357 | case 4: |
| 358 | value := make([]uint32, dataSize/4) |
| 359 | for offset := 0; offset < dataSize; offset += rowSize { |
| 360 | value[offset] = binary.BigEndian.Uint32(data[offset:]) |
| 361 | index++ |
| 362 | } |
| 363 | return value, nil |
| 364 | case 8: |
| 365 | value := make([]uint64, dataSize/8) |
| 366 | for offset := 0; offset < dataSize; offset += rowSize { |
| 367 | value[offset] = binary.BigEndian.Uint64(data[offset:]) |
| 368 | index++ |
| 369 | } |
| 370 | return value, nil |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | func (attr *AttributeDefinition) tableAttributeDecode(data []byte, df gopacket.DecodeFeedback, msgType byte) (interface{}, error) { |
| 375 | // Serialization of a table depends on the type of message. A |
| 376 | // Review of ITU-T G.988 shows that access on tables are |
| 377 | // either Read and/or Write, never Set-by-Create |
| 378 | switch msgType { |
| 379 | default: |
| 380 | return nil, fmt.Errorf("unsupported Message Type '%v' for table serialization", msgType) |
| 381 | |
| 382 | case byte(Get) | AK: // Get Response |
| 383 | // Size |
| 384 | value := binary.BigEndian.Uint32(data[0:4]) |
| 385 | return value, nil |
| 386 | |
| 387 | case byte(Set) | AR: // Set Request |
| 388 | fallthrough |
| 389 | |
| 390 | case byte(GetNext) | AK: // Get Next Response |
| 391 | // Block of data (octets) that need to be reassembled before conversion |
| 392 | // to table/row-data. If table attribute is not explicitly given a value |
| 393 | // we have to assume the entire data buffer is the value. The receiver of |
| 394 | // this frame will need to trim off any addtional information at the end |
| 395 | // of the last frame sequence since they (and the ONU) are the only ones |
| 396 | // who know how long the data really is. |
| 397 | size := attr.GetSize() |
| 398 | if size != 0 && len(data) < attr.GetSize() { |
| 399 | df.SetTruncated() |
| 400 | return nil, NewMessageTruncatedError("packet too small for field") |
Andrea Campanella | 10426e2 | 2021-10-15 17:58:04 +0200 | [diff] [blame] | 401 | } |
| 402 | if size == 0 { |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 403 | return nil, NewProcessingError("table attributes with no size are not supported: %v", attr.Name) |
| 404 | } |
| 405 | return data, nil |
| 406 | |
| 407 | case byte(SetTable) | AR: // Set Table Request |
Andrea Campanella | 10426e2 | 2021-10-15 17:58:04 +0200 | [diff] [blame] | 408 | // SetTableRequestType will be composed of zero or more row of a fixed size (based on ME) |
| 409 | // and will be saved to a TableRow struct for the consumer's use |
| 410 | size := attr.GetSize() |
| 411 | if size == 0 { |
| 412 | return nil, NewProcessingError("table attributes with no size are not supported: %v", attr.Name) |
| 413 | } |
| 414 | if len(data)%size != 0 { |
| 415 | df.SetTruncated() |
| 416 | return nil, NewMessageTruncatedError("packet does not contain an integral number of rows") |
| 417 | } |
| 418 | if len(data) == 0 { |
| 419 | return TableRows{}, nil |
| 420 | } |
| 421 | rows := TableRows{ |
| 422 | NumRows: len(data) / size, |
| 423 | Rows: make([]byte, len(data)), |
| 424 | } |
| 425 | copy(rows.Rows, data) |
| 426 | return rows, nil |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 427 | } |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 428 | } |
| 429 | |
| 430 | func (attr *AttributeDefinition) tableAttributeSerializeTo(value interface{}, b gopacket.SerializeBuffer, msgType byte, |
| 431 | bytesAvailable int) (int, error) { |
| 432 | // Serialization of a table depends on the type of message. A |
| 433 | // Review of ITU-T G.988 shows that access on tables are |
| 434 | // either Read and/or Write, never Set-by-Create |
| 435 | switch msgType { |
| 436 | default: |
| 437 | return 0, fmt.Errorf("unsupported Message Type '%v' for table serialization", msgType) |
| 438 | |
| 439 | case byte(Get) | AK: // Get Response |
| 440 | // Size |
| 441 | if bytesAvailable < 4 { |
| 442 | return 0, NewMessageTruncatedError(fmt.Sprintf("not enough space for attribute: %v", attr.Name)) |
| 443 | } |
| 444 | if dwordSize, ok := value.(uint32); ok { |
| 445 | bytes, err := b.AppendBytes(4) |
| 446 | if err != nil { |
| 447 | return 0, err |
| 448 | } |
| 449 | binary.BigEndian.PutUint32(bytes, dwordSize) |
| 450 | return 4, nil |
| 451 | } |
| 452 | return 0, errors.New("unexpected type for table serialization") |
| 453 | |
| 454 | case byte(GetNext) | AK: // Get Next Response |
| 455 | // Values are already in network by order form |
| 456 | if data, ok := value.([]byte); ok { |
| 457 | if bytesAvailable < len(data) { |
| 458 | return 0, NewMessageTruncatedError(fmt.Sprintf("not enough space for attribute: %v", attr.Name)) |
| 459 | } |
| 460 | bytes, err := b.AppendBytes(len(data)) |
| 461 | if err != nil { |
| 462 | return 0, err |
| 463 | } |
| 464 | copy(bytes, data) |
| 465 | return len(data), nil |
| 466 | } |
| 467 | return 0, errors.New("unexpected type for table serialization") |
| 468 | |
| 469 | case byte(Set) | AR: // Set Request |
| 470 | // TODO: For complex table types (such as extended vlan tagging config) create an |
| 471 | // interface definition. Provide a switch type to look for that as well as for |
| 472 | // value being a byte slice... For now, just byte slice provided |
| 473 | break |
| 474 | |
| 475 | case byte(SetTable) | AR: // Set Table Request |
Andrea Campanella | 10426e2 | 2021-10-15 17:58:04 +0200 | [diff] [blame] | 476 | if rows, ok := value.(TableRows); ok { |
| 477 | size := attr.GetSize() |
| 478 | if size != 0 && len(rows.Rows)%size != 0 { |
| 479 | return 0, NewMessageTruncatedError("packet does not contain an integral number of rows") |
| 480 | } |
| 481 | if bytesAvailable < len(rows.Rows) { |
| 482 | return 0, NewMessageTruncatedError(fmt.Sprintf("not enough space for attribute: %v", attr.Name)) |
| 483 | } |
| 484 | bytes, err := b.AppendBytes(len(rows.Rows)) |
| 485 | if err != nil { |
| 486 | return 0, err |
| 487 | } |
| 488 | copy(bytes, rows.Rows) |
| 489 | return len(rows.Rows), nil |
| 490 | } |
| 491 | return 0, errors.New("unexpected type for table serialization") |
Matteo Scandolo | f9d4341 | 2021-01-12 11:11:34 -0800 | [diff] [blame] | 492 | } |
| 493 | size := attr.GetSize() |
| 494 | if bytesAvailable < size { |
| 495 | return 0, NewMessageTruncatedError(fmt.Sprintf("not enough space for attribute: %v", attr.Name)) |
| 496 | } |
| 497 | bytes, err := b.AppendBytes(size) |
| 498 | if err != nil { |
| 499 | return 0, err |
| 500 | } |
| 501 | switch attr.GetSize() { |
| 502 | default: |
| 503 | copy(bytes, value.([]byte)) |
| 504 | case 1: |
| 505 | switch value.(type) { |
| 506 | case int: |
| 507 | bytes[0] = byte(value.(int)) |
| 508 | default: |
| 509 | bytes[0] = value.(byte) |
| 510 | } |
| 511 | case 2: |
| 512 | switch value.(type) { |
| 513 | case int: |
| 514 | binary.BigEndian.PutUint16(bytes, uint16(value.(int))) |
| 515 | default: |
| 516 | binary.BigEndian.PutUint16(bytes, value.(uint16)) |
| 517 | } |
| 518 | case 4: |
| 519 | switch value.(type) { |
| 520 | case int: |
| 521 | binary.BigEndian.PutUint32(bytes, uint32(value.(int))) |
| 522 | default: |
| 523 | binary.BigEndian.PutUint32(bytes, value.(uint32)) |
| 524 | } |
| 525 | case 8: |
| 526 | switch value.(type) { |
| 527 | case int: |
| 528 | binary.BigEndian.PutUint64(bytes, uint64(value.(int))) |
| 529 | default: |
| 530 | binary.BigEndian.PutUint64(bytes, value.(uint64)) |
| 531 | } |
| 532 | } |
| 533 | return size, nil |
| 534 | } |
| 535 | |
| 536 | // GetAttributeDefinitionByName searches the attribute definition map for the |
| 537 | // attribute with the specified name (case insensitive) |
| 538 | func GetAttributeDefinitionByName(attrMap AttributeDefinitionMap, name string) (*AttributeDefinition, error) { |
| 539 | nameLower := strings.ToLower(name) |
| 540 | for _, attrVal := range attrMap { |
| 541 | if nameLower == strings.ToLower(attrVal.GetName()) { |
| 542 | return &attrVal, nil |
| 543 | } |
| 544 | } |
| 545 | return nil, errors.New(fmt.Sprintf("attribute '%s' not found", name)) |
| 546 | } |
| 547 | |
| 548 | // GetAttributeDefinitionMapKeys is a convenience functions since we may need to |
| 549 | // iterate a map in key index order. Maps in Go since v1.0 the iteration order |
| 550 | // of maps have been randomized. |
| 551 | func GetAttributeDefinitionMapKeys(attrMap AttributeDefinitionMap) []uint { |
| 552 | var keys []uint |
| 553 | for k := range attrMap { |
| 554 | keys = append(keys, k) |
| 555 | } |
| 556 | sort.Slice(keys, func(i, j int) bool { return keys[i] < keys[j] }) |
| 557 | return keys |
| 558 | } |
| 559 | |
| 560 | // GetAttributeBitmap returns the attribute bitmask for a single attribute |
| 561 | func GetAttributeBitmap(attrMap AttributeDefinitionMap, name string) (uint16, error) { |
| 562 | attrDef, err := GetAttributeDefinitionByName(attrMap, name) |
| 563 | if err != nil { |
| 564 | return 0, err |
| 565 | } |
| 566 | index := attrDef.GetIndex() |
| 567 | if index == 0 { |
| 568 | return 0, errors.New("managed entity ID should not be used in an attribute bitmask") |
| 569 | } |
| 570 | return uint16(1 << (16 - index)), nil |
| 571 | } |
| 572 | |
| 573 | // GetAttributesBitmap is a convenience functions to scan a list of attributes |
| 574 | // and return the bitmask that represents them |
| 575 | func GetAttributesBitmap(attrMap AttributeDefinitionMap, attributes mapset.Set) (uint16, error) { |
| 576 | var mask uint16 |
| 577 | for _, def := range attrMap { |
| 578 | if attributes.Contains(def.Name) { |
| 579 | mask |= def.Mask |
| 580 | attributes.Remove(def.Name) |
| 581 | } |
| 582 | } |
| 583 | if attributes.Cardinality() > 0 { |
| 584 | return 0, fmt.Errorf("unsupported attributes: %v", attributes) |
| 585 | } |
| 586 | return mask, nil |
| 587 | } |
| 588 | |
| 589 | // GetAttributesValueMap returns the attribute value map with uninitialized values based |
| 590 | // on the attribute bitmask |
| 591 | func GetAttributesValueMap(attrDefs AttributeDefinitionMap, mask uint16, access mapset.Set) (AttributeValueMap, OmciErrors) { |
| 592 | attrMap := make(AttributeValueMap, 0) |
| 593 | for index, def := range attrDefs { |
| 594 | if index == 0 { |
| 595 | continue |
| 596 | } |
| 597 | checkMask := def.Mask |
| 598 | accessOk := access == nil || def.GetAccess().Intersect(access).Cardinality() > 0 |
| 599 | |
| 600 | if (mask&checkMask) != 0 && accessOk { |
| 601 | attrMap[def.GetName()] = nil |
| 602 | mask &= ^checkMask |
| 603 | } |
| 604 | } |
| 605 | if mask != 0 { |
| 606 | // Return map, but signaled failed attributes |
| 607 | return attrMap, NewParameterError(mask) |
| 608 | } |
| 609 | return attrMap, NewOmciSuccess() |
| 610 | } |
| 611 | |
| 612 | /////////////////////////////////////////////////////////////////////// |
| 613 | // Packet definitions for attributes of various types/sizes |
| 614 | func toOctets(str string) []byte { |
| 615 | data, err := base64.StdEncoding.DecodeString(str) |
| 616 | if err != nil { |
| 617 | panic(fmt.Sprintf("Invalid Base-64 string: '%v'", str)) |
| 618 | } |
| 619 | return data |
| 620 | } |
| 621 | |
| 622 | /////////////////////////////////////////////////////////////////////// |
| 623 | // Packet definitions for attributes of various types/sizes |
| 624 | |
| 625 | // ByteField returns an AttributeDefinition for an attribute that is encoded as a single |
| 626 | // octet (8-bits). |
| 627 | func ByteField(name string, attrType AttributeType, mask uint16, defVal uint8, access mapset.Set, avc bool, |
| 628 | optional bool, deprecated bool, index uint) AttributeDefinition { |
| 629 | return AttributeDefinition{ |
| 630 | Name: name, |
| 631 | AttributeType: attrType, |
| 632 | Mask: mask, |
| 633 | Index: index, |
| 634 | DefValue: defVal, |
| 635 | Size: 1, |
| 636 | Access: access, |
| 637 | Avc: avc, |
| 638 | Optional: optional, |
| 639 | Deprecated: deprecated, |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | // Uint16Field returns an AttributeDefinition for an attribute that is encoded as two |
| 644 | // octet (16-bits). |
| 645 | func Uint16Field(name string, attrType AttributeType, mask uint16, defVal uint16, access mapset.Set, avc bool, |
| 646 | optional bool, deprecated bool, index uint) AttributeDefinition { |
| 647 | return AttributeDefinition{ |
| 648 | Name: name, |
| 649 | AttributeType: attrType, |
| 650 | Mask: mask, |
| 651 | Index: index, |
| 652 | DefValue: defVal, |
| 653 | Size: 2, |
| 654 | Access: access, |
| 655 | Avc: avc, |
| 656 | Optional: optional, |
| 657 | Deprecated: deprecated, |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | // Uint32Field returns an AttributeDefinition for an attribute that is encoded as four |
| 662 | // octet (32-bits). |
| 663 | func Uint32Field(name string, attrType AttributeType, mask uint16, defVal uint32, access mapset.Set, avc bool, |
| 664 | optional bool, deprecated bool, index uint) AttributeDefinition { |
| 665 | return AttributeDefinition{ |
| 666 | Name: name, |
| 667 | AttributeType: attrType, |
| 668 | Mask: mask, |
| 669 | Index: index, |
| 670 | DefValue: defVal, |
| 671 | Size: 4, |
| 672 | Access: access, |
| 673 | Avc: avc, |
| 674 | Optional: optional, |
| 675 | Deprecated: deprecated, |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | // Uint64Field returns an AttributeDefinition for an attribute that is encoded as eight |
| 680 | // octet (64-bits). |
| 681 | func Uint64Field(name string, attrType AttributeType, mask uint16, defVal uint64, access mapset.Set, avc bool, |
| 682 | optional bool, deprecated bool, index uint) AttributeDefinition { |
| 683 | return AttributeDefinition{ |
| 684 | Name: name, |
| 685 | AttributeType: attrType, |
| 686 | Mask: mask, |
| 687 | Index: index, |
| 688 | DefValue: defVal, |
| 689 | Size: 8, |
| 690 | Access: access, |
| 691 | Avc: avc, |
| 692 | Optional: optional, |
| 693 | Deprecated: deprecated, |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | // MultiByteField returns an AttributeDefinition for an attribute that is encoded as multiple |
| 698 | // octets that do not map into fields with a length that is 1, 2, 4, or 8 octets. |
| 699 | func MultiByteField(name string, attrType AttributeType, mask uint16, size uint, defVal []byte, access mapset.Set, avc bool, |
| 700 | optional bool, deprecated bool, index uint) AttributeDefinition { |
| 701 | return AttributeDefinition{ |
| 702 | Name: name, |
| 703 | AttributeType: attrType, |
| 704 | Mask: mask, |
| 705 | Index: index, |
| 706 | DefValue: defVal, |
| 707 | Size: int(size), |
| 708 | Access: access, |
| 709 | Avc: avc, |
| 710 | Optional: optional, |
| 711 | Deprecated: deprecated, |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | // Notes on various OMCI ME Table attribute fields. This comment will eventually be |
| 716 | // removed once a good table solution is implemented. These are not all the MEs with |
| 717 | // table attributes, but probably ones I care about to support initially. |
| 718 | // |
| 719 | // ME Notes |
| 720 | // -------------------------------------------------------------------------------------------- |
| 721 | // Port-mapping package -> Combined Port table -> N * 25 sized rows (port (1) + ME(2) * 12) |
| 722 | // ONU Remote Debug -> Reply table (N bytes) |
| 723 | // ONU3-G -> Status snapshot recordtable M x N bytes |
| 724 | // MCAST Gem interworkTP-> IPv4 multicast adress table (12*n) (two 2 byte fields, two 4 byte fields) |
| 725 | // IPv6 multicast adress table (24*n) (various sub-fields) |
| 726 | // L2 mcast gem TP -> MCAST MAC addr filtering table (11 * n) (various sub-fields) |
| 727 | // MAC Bridge Port Filt -> MAC Filter table (8 * n) (3 fields, some are bits) *** BITS *** |
| 728 | // MAC Bridge Port data -> Bridge Table (8*M) (vaius fields, some are bits) *** BITS *** |
| 729 | // VLAN tagging filter -> Rx Vlan tag op table (16 * n) Lots of bit fields *** BITS *** |
| 730 | // MCAST operations profile |
| 731 | // MCAST Subscriber config info |
| 732 | // MCAST subscriber monitor |
| 733 | // OMCI -> Two tables (N bytes and 2*N bytes) |
| 734 | // General pupose buffer -> N bytes |
| 735 | // Enhanced security control (17 * N bytes), (16 * P Bytes) , (16 * Q bytes), and more... |
| 736 | // |
| 737 | // An early example of info to track |
| 738 | |
| 739 | // TableInfo is an early prototype of how to better model some tables that are |
| 740 | // difficult to code. |
| 741 | // |
| 742 | // The Value member may be one of the following: |
| 743 | // nil : Empty, no default, ... |
| 744 | // value : A specific value that equates to one row, ie) 6 or toOctets("base64") |
| 745 | // array : One or more rows of values. [2]uint16{2, 3} |
| 746 | type TableInfo struct { |
| 747 | Value interface{} // See comment above |
| 748 | Size int // Table Row Size |
| 749 | } |
| 750 | |
| 751 | func (t *TableInfo) String() string { |
| 752 | return fmt.Sprintf("TableInfo: Size: %d, Value(s): %v", t.Size, t.Value) |
| 753 | } |
| 754 | |
| 755 | // TableField is used to define an attribute that is a table |
| 756 | func TableField(name string, attrType AttributeType, mask uint16, tableInfo TableInfo, access mapset.Set, |
| 757 | avc bool, optional bool, deprecated bool, index uint) AttributeDefinition { |
| 758 | return AttributeDefinition{ |
| 759 | Name: name, |
| 760 | AttributeType: attrType, |
| 761 | Mask: mask, |
| 762 | Index: index, |
| 763 | DefValue: tableInfo.Value, |
| 764 | Size: tableInfo.Size, //Number of elements |
| 765 | Access: access, |
| 766 | Avc: avc, |
| 767 | Optional: optional, |
| 768 | Deprecated: deprecated, |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | // UnknownField is currently not used and may be deprecated. Its original intent |
| 773 | // was to be a placeholder during table attribute development |
| 774 | func UnknownField(name string, mask uint16, size int, index uint) AttributeDefinition { |
| 775 | return AttributeDefinition{ |
| 776 | Name: name, |
| 777 | AttributeType: UnknownAttributeType, // Stored as octet string |
| 778 | Mask: mask, |
| 779 | Index: index, |
| 780 | DefValue: nil, |
| 781 | Size: size, |
| 782 | Access: mapset.NewSet(Read, Write), |
| 783 | Avc: false, |
| 784 | Optional: false, |
| 785 | Deprecated: false, |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | // AttributeValueMap maps an attribute (by name) to its value |
| 790 | type AttributeValueMap map[string]interface{} |
| 791 | |
| 792 | // MergeInDefaultValues will examine the Manage Entity defaults (for non-SetByCreate attributes). This |
| 793 | // function is called on a MIB Create request but is provide for external use in case it is needed |
| 794 | // before the MIB entry is created |
| 795 | func MergeInDefaultValues(classID ClassID, attributes AttributeValueMap) OmciErrors { |
| 796 | // Get default values for non-SetByCreate attributes |
| 797 | attrDefs, err := GetAttributesDefinitions(classID) |
| 798 | if err.StatusCode() != Success { |
| 799 | return err |
| 800 | } else if attributes == nil { |
| 801 | return NewProcessingError("Invalid (nil) Attribute Value Map referenced") |
| 802 | } |
| 803 | nilAllowed := mapset.NewSet(StringAttributeType, OctetsAttributeType, TableAttributeType) |
| 804 | for index, attrDef := range attrDefs { |
| 805 | if !attrDef.Access.Contains(SetByCreate) && index != 0 && |
| 806 | (attrDef.DefValue != nil || nilAllowed.Contains(attrDef.AttributeType)) { |
| 807 | name := attrDef.GetName() |
| 808 | if existing, found := attributes[name]; !found || existing == nil { |
| 809 | attributes[name] = attrDef.DefValue |
| 810 | } |
| 811 | } |
| 812 | } |
| 813 | return err |
| 814 | } |
Andrea Campanella | 10426e2 | 2021-10-15 17:58:04 +0200 | [diff] [blame] | 815 | |
| 816 | // AttributeValueMapBufferSize will determine how much space is needed to encode all |
| 817 | // of the attributes |
| 818 | func AttributeValueMapBufferSize(classID ClassID, attributes AttributeValueMap, msgType uint8) (int, error) { |
| 819 | attrDefs, err := GetAttributesDefinitions(classID) |
| 820 | if err.StatusCode() != Success { |
| 821 | return 0, err |
| 822 | } else if attributes == nil { |
| 823 | return 0, NewProcessingError("Invalid (nil) Attribute Value Map referenced") |
| 824 | } |
| 825 | bufferSize := 0 |
| 826 | isGetResponse := msgType == 0x29 |
| 827 | |
| 828 | for _, attrDef := range attrDefs { |
| 829 | if isGetResponse && attrDef.IsTableAttribute() { |
| 830 | bufferSize += 4 |
| 831 | } else { |
| 832 | bufferSize += attrDef.GetSize() |
| 833 | } |
| 834 | } |
| 835 | return bufferSize, nil |
| 836 | } |