| 1 | package protocol |
| 2 | |
| 3 | const ( |
| 4 | NipcUIDUnset uint32 = ^uint32(0) |
| 5 | |
| 6 | PidLookupKnown uint16 = 0 |
| 7 | PidLookupUnknown uint16 = 1 |
| 8 | |
| 9 | AppsCgroupKnown uint16 = 0 |
| 10 | AppsCgroupUnknownRetryLater uint16 = 1 |
| 11 | AppsCgroupUnknownPermanent uint16 = 2 |
| 12 | AppsCgroupHostRoot uint16 = 3 |
| 13 | |
| 14 | AppsLookupReqHdr = 16 |
| 15 | AppsLookupRespHdr = 16 |
| 16 | AppsLookupItemHdr = 60 |
| 17 | AppsLookupKeySize = 8 |
| 18 | |
| 19 | appsLookupUnknownItemSize = AppsLookupItemHdr + 3 |
| 20 | ) |
| 21 | |
| 22 | type AppsLookupRequestView struct { |
| 23 | ItemCount uint32 |
| 24 | payload []byte |
| 25 | } |
| 26 | |
| 27 | type AppsLookupResponseView struct { |
| 28 | LayoutVersion uint16 |
| 29 | Flags uint16 |
| 30 | ItemCount uint32 |
| 31 | Generation uint64 |
| 32 | payload []byte |
| 33 | } |
| 34 | |
| 35 | type AppsLookupItemView struct { |
| 36 | Status uint16 |
| 37 | Orchestrator uint16 |
| 38 | CgroupStatus uint16 |
| 39 | Pid uint32 |
| 40 | Ppid uint32 |
| 41 | Uid uint32 |
| 42 | Starttime uint64 |
| 43 | Comm CStringView |
| 44 | CgroupPath CStringView |
| 45 | CgroupName CStringView |
| 46 | LabelCount uint16 |
| 47 | item []byte |
| 48 | labelTableOffset int |
| 49 | } |
| 50 | |
| 51 | type appsLookupSemantics struct { |
| 52 | status uint16 |
| 53 | cgroupStatus uint16 |
| 54 | orchestrator uint16 |
| 55 | ppid uint32 |
| 56 | uid uint32 |
| 57 | starttime uint64 |
| 58 | commLen int |
| 59 | pathLen int |
| 60 | nameLen int |
| 61 | labelCount int |
| 62 | } |
| 63 | |
| 64 | func validateAppsLookupSemantics(v appsLookupSemantics) error { |
| 65 | if err := validateAppsLookupDomains(v.status, v.cgroupStatus, v.commLen); err != nil { |
| 66 | return err |
| 67 | } |
| 68 | if v.status == PidLookupUnknown { |
| 69 | return validateAppsLookupUnknown(v) |
| 70 | } |
| 71 | return validateAppsLookupKnown(v) |
| 72 | } |
| 73 | |
| 74 | func validateAppsLookupDomains(status, cgroupStatus uint16, commLen int) error { |
| 75 | if status != PidLookupKnown && status != PidLookupUnknown { |
| 76 | return ErrBadLayout |
| 77 | } |
| 78 | if cgroupStatus != AppsCgroupKnown && cgroupStatus != AppsCgroupUnknownRetryLater && |
| 79 | cgroupStatus != AppsCgroupUnknownPermanent && cgroupStatus != AppsCgroupHostRoot { |
| 80 | return ErrBadLayout |
| 81 | } |
| 82 | if commLen > 15 { |
| 83 | return ErrBadLayout |
| 84 | } |
| 85 | return nil |
| 86 | } |
| 87 | |
| 88 | func validateAppsLookupUnknown(v appsLookupSemantics) error { |
| 89 | if v.orchestrator != 0 || v.cgroupStatus != 0 || v.ppid != 0 || v.uid != NipcUIDUnset || |
| 90 | v.starttime != 0 || v.commLen != 0 || v.pathLen != 0 || v.nameLen != 0 || v.labelCount != 0 { |
| 91 | return ErrBadLayout |
| 92 | } |
| 93 | return nil |
| 94 | } |
| 95 | |
| 96 | func validateAppsLookupKnown(v appsLookupSemantics) error { |
| 97 | if v.commLen == 0 { |
| 98 | return ErrBadLayout |
| 99 | } |
| 100 | switch v.cgroupStatus { |
| 101 | case AppsCgroupKnown: |
| 102 | if v.pathLen == 0 { |
| 103 | return ErrBadLayout |
| 104 | } |
| 105 | case AppsCgroupUnknownRetryLater: |
| 106 | if v.orchestrator != 0 || v.nameLen != 0 || v.labelCount != 0 { |
| 107 | return ErrBadLayout |
| 108 | } |
| 109 | case AppsCgroupUnknownPermanent: |
| 110 | if v.pathLen == 0 || v.orchestrator != 0 || v.nameLen != 0 || v.labelCount != 0 { |
| 111 | return ErrBadLayout |
| 112 | } |
| 113 | case AppsCgroupHostRoot: |
| 114 | if v.orchestrator != 0 || v.pathLen != 0 || v.nameLen != 0 || v.labelCount != 0 { |
| 115 | return ErrBadLayout |
| 116 | } |
| 117 | } |
| 118 | return nil |
| 119 | } |
| 120 | |
| 121 | func EncodeAppsLookupRequest(pids []uint32, buf []byte) (int, error) { |
| 122 | count := len(pids) |
| 123 | if uint64(count) > uint64(^uint32(0)) { |
| 124 | return 0, ErrOverflow |
| 125 | } |
| 126 | dirSize, ok := checkedMulInt(count, LookupDirEntrySize) |
| 127 | if !ok { |
| 128 | return 0, ErrOverflow |
| 129 | } |
| 130 | keySize, ok := checkedMulInt(count, AppsLookupKeySize) |
| 131 | if !ok { |
| 132 | return 0, ErrOverflow |
| 133 | } |
| 134 | packedStart, ok := checkedAddInt(AppsLookupReqHdr, dirSize) |
| 135 | if !ok { |
| 136 | return 0, ErrOverflow |
| 137 | } |
| 138 | total, ok := checkedAddInt(packedStart, keySize) |
| 139 | if !ok { |
| 140 | return 0, ErrOverflow |
| 141 | } |
| 142 | if total > len(buf) { |
| 143 | return 0, ErrOverflow |
| 144 | } |
| 145 | for i, pid := range pids { |
| 146 | offset32, ok := checkedU32Int(i * AppsLookupKeySize) |
| 147 | if !ok { |
| 148 | return 0, ErrOverflow |
| 149 | } |
| 150 | base := AppsLookupReqHdr + i*LookupDirEntrySize |
| 151 | ne.PutUint32(buf[base:base+4], offset32) |
| 152 | ne.PutUint32(buf[base+4:base+8], AppsLookupKeySize) |
| 153 | key := packedStart + i*AppsLookupKeySize |
| 154 | ne.PutUint32(buf[key:key+4], pid) |
| 155 | ne.PutUint32(buf[key+4:key+8], 0) |
| 156 | } |
| 157 | ne.PutUint16(buf[0:2], 1) |
| 158 | ne.PutUint16(buf[2:4], 0) |
| 159 | ne.PutUint32(buf[4:8], uint32(count)) |
| 160 | ne.PutUint32(buf[8:12], 0) |
| 161 | ne.PutUint32(buf[12:16], 0) |
| 162 | return total, nil |
| 163 | } |
| 164 | |
| 165 | func DecodeAppsLookupRequest(buf []byte) (*AppsLookupRequestView, error) { |
| 166 | if len(buf) < AppsLookupReqHdr { |
| 167 | return nil, ErrTruncated |
| 168 | } |
| 169 | if ne.Uint16(buf[0:2]) != 1 || ne.Uint16(buf[2:4]) != 0 || |
| 170 | ne.Uint32(buf[8:12]) != 0 || ne.Uint32(buf[12:16]) != 0 { |
| 171 | return nil, ErrBadLayout |
| 172 | } |
| 173 | itemCount := ne.Uint32(buf[4:8]) |
| 174 | dirSize64 := uint64(itemCount) * uint64(LookupDirEntrySize) |
| 175 | dirEnd, ok := checkedInt(uint64(AppsLookupReqHdr) + dirSize64) |
| 176 | if !ok { |
| 177 | return nil, ErrBadItemCount |
| 178 | } |
| 179 | if dirEnd > len(buf) { |
| 180 | return nil, ErrTruncated |
| 181 | } |
| 182 | if err := validateLookupDir(buf, AppsLookupReqHdr, itemCount, len(buf)-dirEnd, 0, AppsLookupKeySize); err != nil { |
| 183 | return nil, err |
| 184 | } |
| 185 | for i := range itemCount { |
| 186 | base := AppsLookupReqHdr + int(i)*LookupDirEntrySize |
| 187 | off, _, err := lookupDirEntry(buf, base) |
| 188 | if err != nil { |
| 189 | return nil, err |
| 190 | } |
| 191 | key, err := lookupPayloadSlice(buf, dirEnd, off, AppsLookupKeySize) |
| 192 | if err != nil { |
| 193 | return nil, err |
| 194 | } |
| 195 | if ne.Uint32(key[4:8]) != 0 { |
| 196 | return nil, ErrBadLayout |
| 197 | } |
| 198 | } |
| 199 | return &AppsLookupRequestView{ItemCount: itemCount, payload: buf}, nil |
| 200 | } |
| 201 | |
| 202 | func (v *AppsLookupRequestView) Item(index uint32) (uint32, error) { |
| 203 | if index >= v.ItemCount { |
| 204 | return 0, ErrOutOfBounds |
| 205 | } |
| 206 | dirEnd, ok := lookupBuilderDataOffset(AppsLookupReqHdr, v.ItemCount) |
| 207 | if !ok { |
| 208 | return 0, ErrOverflow |
| 209 | } |
| 210 | base, ok := lookupDirOffset(AppsLookupReqHdr, index) |
| 211 | if !ok { |
| 212 | return 0, ErrOverflow |
| 213 | } |
| 214 | off, _, err := lookupDirEntry(v.payload, base) |
| 215 | if err != nil { |
| 216 | return 0, err |
| 217 | } |
| 218 | key, err := lookupPayloadSlice(v.payload, dirEnd, off, AppsLookupKeySize) |
| 219 | if err != nil { |
| 220 | return 0, err |
| 221 | } |
| 222 | return ne.Uint32(key[0:4]), nil |
| 223 | } |
| 224 | |
| 225 | func DecodeAppsLookupResponse(buf []byte) (*AppsLookupResponseView, error) { |
| 226 | if len(buf) < AppsLookupRespHdr { |
| 227 | return nil, ErrTruncated |
| 228 | } |
| 229 | if ne.Uint16(buf[0:2]) != 1 || ne.Uint16(buf[2:4]) != 0 { |
| 230 | return nil, ErrBadLayout |
| 231 | } |
| 232 | itemCount := ne.Uint32(buf[4:8]) |
| 233 | dirEnd, ok := checkedInt(uint64(AppsLookupRespHdr) + uint64(itemCount)*uint64(LookupDirEntrySize)) |
| 234 | if !ok { |
| 235 | return nil, ErrBadItemCount |
| 236 | } |
| 237 | if dirEnd > len(buf) { |
| 238 | return nil, ErrTruncated |
| 239 | } |
| 240 | if err := validateLookupDir(buf, AppsLookupRespHdr, itemCount, len(buf)-dirEnd, AppsLookupItemHdr, -1); err != nil { |
| 241 | return nil, err |
| 242 | } |
| 243 | for i := range itemCount { |
| 244 | base := AppsLookupRespHdr + int(i)*LookupDirEntrySize |
| 245 | off, length, err := lookupDirEntry(buf, base) |
| 246 | if err != nil { |
| 247 | return nil, err |
| 248 | } |
| 249 | item, err := lookupPayloadSlice(buf, dirEnd, off, length) |
| 250 | if err != nil { |
| 251 | return nil, err |
| 252 | } |
| 253 | if _, err := decodeAppsLookupItem(item); err != nil { |
| 254 | return nil, err |
| 255 | } |
| 256 | } |
| 257 | return &AppsLookupResponseView{ |
| 258 | LayoutVersion: 1, |
| 259 | Flags: 0, |
| 260 | ItemCount: itemCount, |
| 261 | Generation: ne.Uint64(buf[8:16]), |
| 262 | payload: buf, |
| 263 | }, nil |
| 264 | } |
| 265 | |
| 266 | func (v *AppsLookupResponseView) Item(index uint32) (*AppsLookupItemView, error) { |
| 267 | if index >= v.ItemCount { |
| 268 | return nil, ErrOutOfBounds |
| 269 | } |
| 270 | dirEnd, ok := lookupBuilderDataOffset(AppsLookupRespHdr, v.ItemCount) |
| 271 | if !ok { |
| 272 | return nil, ErrOverflow |
| 273 | } |
| 274 | base, ok := lookupDirOffset(AppsLookupRespHdr, index) |
| 275 | if !ok { |
| 276 | return nil, ErrOverflow |
| 277 | } |
| 278 | off, length, err := lookupDirEntry(v.payload, base) |
| 279 | if err != nil { |
| 280 | return nil, err |
| 281 | } |
| 282 | item, err := lookupPayloadSlice(v.payload, dirEnd, off, length) |
| 283 | if err != nil { |
| 284 | return nil, err |
| 285 | } |
| 286 | return decodeAppsLookupItem(item) |
| 287 | } |
| 288 | |
| 289 | func decodeAppsLookupItem(item []byte) (*AppsLookupItemView, error) { |
| 290 | if len(item) < AppsLookupItemHdr { |
| 291 | return nil, ErrTruncated |
| 292 | } |
| 293 | status := ne.Uint16(item[2:4]) |
| 294 | orchestrator := ne.Uint16(item[4:6]) |
| 295 | cgroupStatus := ne.Uint16(item[6:8]) |
| 296 | pid := ne.Uint32(item[8:12]) |
| 297 | ppid := ne.Uint32(item[12:16]) |
| 298 | uid := ne.Uint32(item[16:20]) |
| 299 | starttime := ne.Uint64(item[24:32]) |
| 300 | commOff, err := checkedWireU32Int(item, 32) |
| 301 | if err != nil { |
| 302 | return nil, err |
| 303 | } |
| 304 | commLen, err := checkedWireU32Int(item, 36) |
| 305 | if err != nil { |
| 306 | return nil, err |
| 307 | } |
| 308 | pathOff, err := checkedWireU32Int(item, 40) |
| 309 | if err != nil { |
| 310 | return nil, err |
| 311 | } |
| 312 | pathLen, err := checkedWireU32Int(item, 44) |
| 313 | if err != nil { |
| 314 | return nil, err |
| 315 | } |
| 316 | nameOff, err := checkedWireU32Int(item, 48) |
| 317 | if err != nil { |
| 318 | return nil, err |
| 319 | } |
| 320 | nameLen, err := checkedWireU32Int(item, 52) |
| 321 | if err != nil { |
| 322 | return nil, err |
| 323 | } |
| 324 | labelCount := ne.Uint16(item[56:58]) |
| 325 | if ne.Uint16(item[0:2]) != 1 || ne.Uint32(item[20:24]) != 0 || ne.Uint16(item[58:60]) != 0 { |
| 326 | return nil, ErrBadLayout |
| 327 | } |
| 328 | if err := validateAppsLookupSemantics(appsLookupSemantics{ |
| 329 | status: status, |
| 330 | cgroupStatus: cgroupStatus, |
| 331 | orchestrator: orchestrator, |
| 332 | ppid: ppid, |
| 333 | uid: uid, |
| 334 | starttime: starttime, |
| 335 | commLen: commLen, |
| 336 | pathLen: pathLen, |
| 337 | nameLen: nameLen, |
| 338 | labelCount: int(labelCount), |
| 339 | }); err != nil { |
| 340 | return nil, err |
| 341 | } |
| 342 | if status == PidLookupUnknown { |
| 343 | return decodeAppsLookupUnknownItem(item, pid, commOff, pathOff, nameOff) |
| 344 | } |
| 345 | comm, commEnd, err := lookupString(item, AppsLookupItemHdr, commOff, commLen) |
| 346 | if err != nil { |
| 347 | return nil, err |
| 348 | } |
| 349 | path, pathEnd, err := lookupString(item, AppsLookupItemHdr, pathOff, pathLen) |
| 350 | if err != nil { |
| 351 | return nil, err |
| 352 | } |
| 353 | name, nameEnd, err := lookupString(item, AppsLookupItemHdr, nameOff, nameLen) |
| 354 | if err != nil { |
| 355 | return nil, err |
| 356 | } |
| 357 | if overlap(commOff, commEnd, pathOff, pathEnd) || overlap(commOff, commEnd, nameOff, nameEnd) || |
| 358 | overlap(pathOff, pathEnd, nameOff, nameEnd) { |
| 359 | return nil, ErrBadLayout |
| 360 | } |
| 361 | table, err := validateLabels(item, AppsLookupItemHdr, labelCount, max(commEnd, max(pathEnd, nameEnd))) |
| 362 | if err != nil { |
| 363 | return nil, err |
| 364 | } |
| 365 | return &AppsLookupItemView{ |
| 366 | Status: status, |
| 367 | Orchestrator: orchestrator, |
| 368 | CgroupStatus: cgroupStatus, |
| 369 | Pid: pid, |
| 370 | Ppid: ppid, |
| 371 | Uid: uid, |
| 372 | Starttime: starttime, |
| 373 | Comm: comm, |
| 374 | CgroupPath: path, |
| 375 | CgroupName: name, |
| 376 | LabelCount: labelCount, |
| 377 | item: item, |
| 378 | labelTableOffset: table, |
| 379 | }, nil |
| 380 | } |
| 381 | |
| 382 | func decodeAppsLookupUnknownItem(item []byte, pid uint32, commOff, pathOff, nameOff int) (*AppsLookupItemView, error) { |
| 383 | comm, commEnd, err := lookupEmptyString(item, AppsLookupItemHdr, commOff) |
| 384 | if err != nil { |
| 385 | return nil, err |
| 386 | } |
| 387 | path, pathEnd, err := lookupEmptyString(item, AppsLookupItemHdr, pathOff) |
| 388 | if err != nil { |
| 389 | return nil, err |
| 390 | } |
| 391 | name, nameEnd, err := lookupEmptyString(item, AppsLookupItemHdr, nameOff) |
| 392 | if err != nil { |
| 393 | return nil, err |
| 394 | } |
| 395 | if overlap(commOff, commEnd, pathOff, pathEnd) || overlap(commOff, commEnd, nameOff, nameEnd) || |
| 396 | overlap(pathOff, pathEnd, nameOff, nameEnd) { |
| 397 | return nil, ErrBadLayout |
| 398 | } |
| 399 | labelTableOffset := max(commEnd, max(pathEnd, nameEnd)) |
| 400 | if labelTableOffset != len(item) { |
| 401 | return nil, ErrBadLayout |
| 402 | } |
| 403 | return &AppsLookupItemView{ |
| 404 | Status: PidLookupUnknown, |
| 405 | CgroupStatus: AppsCgroupKnown, |
| 406 | Pid: pid, |
| 407 | Uid: NipcUIDUnset, |
| 408 | Comm: comm, |
| 409 | CgroupPath: path, |
| 410 | CgroupName: name, |
| 411 | item: item, |
| 412 | labelTableOffset: labelTableOffset, |
| 413 | }, nil |
| 414 | } |
| 415 | |
| 416 | func (v *AppsLookupItemView) Label(index uint32) (LookupLabelView, error) { |
| 417 | return lookupLabelAt(v.item, AppsLookupItemHdr, v.LabelCount, v.labelTableOffset, index) |
| 418 | } |
| 419 | |
| 420 | type AppsLookupBuilder struct { |
| 421 | buf []byte |
| 422 | generation uint64 |
| 423 | itemCount uint32 |
| 424 | maxItems uint32 |
| 425 | dataOffset int |
| 426 | err error |
| 427 | } |
| 428 | |
| 429 | func NewAppsLookupBuilder(buf []byte, maxItems uint32, generation uint64) *AppsLookupBuilder { |
| 430 | minRequired, ok := lookupBuilderDataOffset(AppsLookupRespHdr, maxItems) |
| 431 | if !ok { |
| 432 | panic("AppsLookupBuilder buffer too small") |
| 433 | } |
| 434 | if len(buf) < minRequired { |
| 435 | panic("AppsLookupBuilder buffer too small") |
| 436 | } |
| 437 | return &AppsLookupBuilder{buf: buf, generation: generation, maxItems: maxItems, dataOffset: minRequired} |
| 438 | } |
| 439 | |
| 440 | func (b *AppsLookupBuilder) SetGeneration(generation uint64) { |
| 441 | b.generation = generation |
| 442 | } |
| 443 | |
| 444 | // Add appends one APPS_LOOKUP wire item; parameters mirror the fixed protocol fields. |
| 445 | func (b *AppsLookupBuilder) Add(status, cgroupStatus, orchestrator uint16, pid, ppid, uid uint32, starttime uint64, comm, cgroupPath, cgroupName []byte, labels []struct{ Key, Value []byte }) error { //NOSONAR |
| 446 | if b.itemCount >= b.maxItems { |
| 447 | b.err = ErrOverflow |
| 448 | return ErrOverflow |
| 449 | } |
| 450 | if err := validateAppsLookupSemantics(appsLookupSemantics{ |
| 451 | status: status, |
| 452 | cgroupStatus: cgroupStatus, |
| 453 | orchestrator: orchestrator, |
| 454 | ppid: ppid, |
| 455 | uid: uid, |
| 456 | starttime: starttime, |
| 457 | commLen: len(comm), |
| 458 | pathLen: len(cgroupPath), |
| 459 | nameLen: len(cgroupName), |
| 460 | labelCount: len(labels), |
| 461 | }); err != nil { |
| 462 | b.err = err |
| 463 | return err |
| 464 | } |
| 465 | if status == PidLookupUnknown { |
| 466 | return b.addUnknown(pid) |
| 467 | } |
| 468 | if invalidSourceString(comm, status == PidLookupKnown) || |
| 469 | invalidSourceString(cgroupPath, false) || invalidSourceString(cgroupName, false) { |
| 470 | b.err = ErrBadLayout |
| 471 | return ErrBadLayout |
| 472 | } |
| 473 | labelCount, ok := checkedU16Int(len(labels)) |
| 474 | if !ok { |
| 475 | b.err = ErrOverflow |
| 476 | return ErrOverflow |
| 477 | } |
| 478 | itemStart, ok := checkedAlign8(b.dataOffset) |
| 479 | if !ok { |
| 480 | b.err = ErrOverflow |
| 481 | return ErrOverflow |
| 482 | } |
| 483 | commOff := AppsLookupItemHdr |
| 484 | pathOff, ok := checkedAddInt(commOff, len(comm)) |
| 485 | if ok { |
| 486 | pathOff, ok = checkedAddInt(pathOff, 1) |
| 487 | } |
| 488 | if !ok { |
| 489 | b.err = ErrOverflow |
| 490 | return ErrOverflow |
| 491 | } |
| 492 | nameOff, ok := checkedAddInt(pathOff, len(cgroupPath)) |
| 493 | if ok { |
| 494 | nameOff, ok = checkedAddInt(nameOff, 1) |
| 495 | } |
| 496 | if !ok { |
| 497 | b.err = ErrOverflow |
| 498 | return ErrOverflow |
| 499 | } |
| 500 | fixedEnd, ok := checkedAddInt(nameOff, len(cgroupName)) |
| 501 | if ok { |
| 502 | fixedEnd, ok = checkedAddInt(fixedEnd, 1) |
| 503 | } |
| 504 | if !ok { |
| 505 | b.err = ErrOverflow |
| 506 | return ErrOverflow |
| 507 | } |
| 508 | tableStart, tableBytes, itemSize, err := labelLayoutGo(fixedEnd, labels) |
| 509 | if err != nil { |
| 510 | b.err = err |
| 511 | return err |
| 512 | } |
| 513 | itemEnd, ok := checkedAddInt(itemStart, itemSize) |
| 514 | if !ok { |
| 515 | b.err = ErrOverflow |
| 516 | return ErrOverflow |
| 517 | } |
| 518 | if itemEnd > len(b.buf) { |
| 519 | b.err = ErrOverflow |
| 520 | return ErrOverflow |
| 521 | } |
| 522 | commOff32, ok := checkedU32Int(commOff) |
| 523 | if !ok { |
| 524 | b.err = ErrOverflow |
| 525 | return ErrOverflow |
| 526 | } |
| 527 | commLen32, ok := checkedU32Int(len(comm)) |
| 528 | if !ok { |
| 529 | b.err = ErrOverflow |
| 530 | return ErrOverflow |
| 531 | } |
| 532 | pathOff32, ok := checkedU32Int(pathOff) |
| 533 | if !ok { |
| 534 | b.err = ErrOverflow |
| 535 | return ErrOverflow |
| 536 | } |
| 537 | pathLen32, ok := checkedU32Int(len(cgroupPath)) |
| 538 | if !ok { |
| 539 | b.err = ErrOverflow |
| 540 | return ErrOverflow |
| 541 | } |
| 542 | nameOff32, ok := checkedU32Int(nameOff) |
| 543 | if !ok { |
| 544 | b.err = ErrOverflow |
| 545 | return ErrOverflow |
| 546 | } |
| 547 | nameLen32, ok := checkedU32Int(len(cgroupName)) |
| 548 | if !ok { |
| 549 | b.err = ErrOverflow |
| 550 | return ErrOverflow |
| 551 | } |
| 552 | itemStart32, ok := checkedU32Int(itemStart) |
| 553 | if !ok { |
| 554 | b.err = ErrOverflow |
| 555 | return ErrOverflow |
| 556 | } |
| 557 | itemSize32, ok := checkedU32Int(itemSize) |
| 558 | if !ok { |
| 559 | b.err = ErrOverflow |
| 560 | return ErrOverflow |
| 561 | } |
| 562 | clear(b.buf[b.dataOffset:itemStart]) |
| 563 | item := b.buf[itemStart:itemEnd] |
| 564 | ne.PutUint16(item[0:2], 1) |
| 565 | ne.PutUint16(item[2:4], status) |
| 566 | ne.PutUint16(item[4:6], orchestrator) |
| 567 | ne.PutUint16(item[6:8], cgroupStatus) |
| 568 | ne.PutUint32(item[8:12], pid) |
| 569 | ne.PutUint32(item[12:16], ppid) |
| 570 | ne.PutUint32(item[16:20], uid) |
| 571 | ne.PutUint32(item[20:24], 0) |
| 572 | ne.PutUint64(item[24:32], starttime) |
| 573 | ne.PutUint32(item[32:36], commOff32) |
| 574 | ne.PutUint32(item[36:40], commLen32) |
| 575 | ne.PutUint32(item[40:44], pathOff32) |
| 576 | ne.PutUint32(item[44:48], pathLen32) |
| 577 | ne.PutUint32(item[48:52], nameOff32) |
| 578 | ne.PutUint32(item[52:56], nameLen32) |
| 579 | ne.PutUint16(item[56:58], labelCount) |
| 580 | ne.PutUint16(item[58:60], 0) |
| 581 | copy(item[commOff:], comm) |
| 582 | item[commOff+len(comm)] = 0 |
| 583 | copy(item[pathOff:], cgroupPath) |
| 584 | item[pathOff+len(cgroupPath)] = 0 |
| 585 | copy(item[nameOff:], cgroupName) |
| 586 | item[nameOff+len(cgroupName)] = 0 |
| 587 | if len(labels) > 0 { |
| 588 | clear(item[fixedEnd:tableStart]) |
| 589 | next, err := writeLookupLabels(item, tableStart, tableBytes, labels) |
| 590 | if err != nil { |
| 591 | b.err = err |
| 592 | return err |
| 593 | } |
| 594 | itemSize = next |
| 595 | } |
| 596 | dir, ok := lookupDirOffset(AppsLookupRespHdr, b.itemCount) |
| 597 | if !ok { |
| 598 | b.err = ErrOverflow |
| 599 | return ErrOverflow |
| 600 | } |
| 601 | ne.PutUint32(b.buf[dir:dir+4], itemStart32) |
| 602 | ne.PutUint32(b.buf[dir+4:dir+8], itemSize32) |
| 603 | b.dataOffset = itemStart + itemSize |
| 604 | b.itemCount++ |
| 605 | return nil |
| 606 | } |
| 607 | |
| 608 | func (b *AppsLookupBuilder) addUnknown(pid uint32) error { |
| 609 | itemStart, ok := checkedAlign8(b.dataOffset) |
| 610 | if !ok { |
| 611 | b.err = ErrOverflow |
| 612 | return ErrOverflow |
| 613 | } |
| 614 | itemEnd, ok := checkedAddInt(itemStart, appsLookupUnknownItemSize) |
| 615 | if !ok || itemEnd > len(b.buf) { |
| 616 | b.err = ErrOverflow |
| 617 | return ErrOverflow |
| 618 | } |
| 619 | itemStart32, ok := checkedU32Int(itemStart) |
| 620 | if !ok { |
| 621 | b.err = ErrOverflow |
| 622 | return ErrOverflow |
| 623 | } |
| 624 | itemSize32, ok := checkedU32Int(appsLookupUnknownItemSize) |
| 625 | if !ok { |
| 626 | b.err = ErrOverflow |
| 627 | return ErrOverflow |
| 628 | } |
| 629 | clear(b.buf[b.dataOffset:itemStart]) |
| 630 | item := b.buf[itemStart:itemEnd] |
| 631 | clear(item) |
| 632 | ne.PutUint16(item[0:2], 1) |
| 633 | ne.PutUint16(item[2:4], PidLookupUnknown) |
| 634 | ne.PutUint32(item[8:12], pid) |
| 635 | ne.PutUint32(item[16:20], NipcUIDUnset) |
| 636 | ne.PutUint32(item[32:36], AppsLookupItemHdr) |
| 637 | ne.PutUint32(item[40:44], AppsLookupItemHdr+1) |
| 638 | ne.PutUint32(item[48:52], AppsLookupItemHdr+2) |
| 639 | |
| 640 | dir, ok := lookupDirOffset(AppsLookupRespHdr, b.itemCount) |
| 641 | if !ok { |
| 642 | b.err = ErrOverflow |
| 643 | return ErrOverflow |
| 644 | } |
| 645 | ne.PutUint32(b.buf[dir:dir+4], itemStart32) |
| 646 | ne.PutUint32(b.buf[dir+4:dir+8], itemSize32) |
| 647 | b.dataOffset = itemEnd |
| 648 | b.itemCount++ |
| 649 | return nil |
| 650 | } |
| 651 | |
| 652 | func (b *AppsLookupBuilder) Finish() int { |
| 653 | return finishLookupResponse(b.buf, AppsLookupRespHdr, b.itemCount, b.dataOffset, b.generation) |
| 654 | } |
| 655 | |
| 656 | func (b *AppsLookupBuilder) Error() error { |
| 657 | return b.err |
| 658 | } |
| 659 | |
| 660 | func (b *AppsLookupBuilder) ItemCount() uint32 { |
| 661 | return b.itemCount |
| 662 | } |
| 663 | |
| 664 | func DispatchAppsLookup(req []byte, resp []byte, handler func(*AppsLookupRequestView, *AppsLookupBuilder) bool) (int, error) { |
| 665 | request, err := DecodeAppsLookupRequest(req) |
| 666 | if err != nil { |
| 667 | return 0, err |
| 668 | } |
| 669 | minRequired, ok := lookupBuilderDataOffset(AppsLookupRespHdr, request.ItemCount) |
| 670 | if !ok || len(resp) < minRequired { |
| 671 | return 0, ErrOverflow |
| 672 | } |
| 673 | builder := NewAppsLookupBuilder(resp, request.ItemCount, 0) |
| 674 | if !handler(request, builder) { |
| 675 | if builder.Error() != nil { |
| 676 | return 0, builder.Error() |
| 677 | } |
| 678 | return 0, ErrBadLayout |
| 679 | } |
| 680 | if builder.Error() != nil { |
| 681 | return 0, builder.Error() |
| 682 | } |
| 683 | if builder.itemCount != request.ItemCount { |
| 684 | return 0, ErrBadItemCount |
| 685 | } |
| 686 | n := builder.Finish() |
| 687 | if n == 0 { |
| 688 | return 0, ErrOverflow |
| 689 | } |
| 690 | return n, nil |
| 691 | } |