| 1 | package protocol |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "testing" |
| 6 | ) |
| 7 | |
| 8 | // --------------------------------------------------------------------------- |
| 9 | // Utility tests |
| 10 | // --------------------------------------------------------------------------- |
| 11 | |
| 12 | func TestAlign8(t *testing.T) { |
| 13 | cases := []struct { |
| 14 | in, want int |
| 15 | }{ |
| 16 | {0, 0}, |
| 17 | {1, 8}, |
| 18 | {7, 8}, |
| 19 | {8, 8}, |
| 20 | {9, 16}, |
| 21 | {15, 16}, |
| 22 | {16, 16}, |
| 23 | {17, 24}, |
| 24 | } |
| 25 | for _, tc := range cases { |
| 26 | if got := Align8(tc.in); got != tc.want { |
| 27 | t.Errorf("Align8(%d) = %d, want %d", tc.in, got, tc.want) |
| 28 | } |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | // --------------------------------------------------------------------------- |
| 33 | // Outer message header tests |
| 34 | // --------------------------------------------------------------------------- |
| 35 | |
| 36 | func TestHeaderRoundtrip(t *testing.T) { |
| 37 | h := Header{ |
| 38 | Magic: MagicMsg, |
| 39 | Version: Version, |
| 40 | HeaderLen: HeaderLen, |
| 41 | Kind: KindRequest, |
| 42 | Flags: FlagBatch, |
| 43 | Code: MethodCgroupsSnapshot, |
| 44 | TransportStatus: StatusOK, |
| 45 | PayloadLen: 12345, |
| 46 | ItemCount: 42, |
| 47 | MessageID: 0xDEADBEEFCAFEBABE, |
| 48 | } |
| 49 | |
| 50 | var buf [64]byte |
| 51 | n := h.Encode(buf[:]) |
| 52 | if n != 32 { |
| 53 | t.Fatalf("Encode returned %d, want 32", n) |
| 54 | } |
| 55 | |
| 56 | out, err := DecodeHeader(buf[:n]) |
| 57 | if err != nil { |
| 58 | t.Fatalf("Decode error: %v", err) |
| 59 | } |
| 60 | if out != h { |
| 61 | t.Fatalf("roundtrip mismatch:\ngot: %+v\nwant: %+v", out, h) |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | func TestHeaderEncodeTooSmall(t *testing.T) { |
| 66 | h := Header{} |
| 67 | var buf [16]byte |
| 68 | if n := h.Encode(buf[:]); n != 0 { |
| 69 | t.Fatalf("Encode returned %d, want 0", n) |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | func TestHeaderDecodeTruncated(t *testing.T) { |
| 74 | buf := make([]byte, 31) |
| 75 | _, err := DecodeHeader(buf) |
| 76 | if err != ErrTruncated { |
| 77 | t.Fatalf("got %v, want ErrTruncated", err) |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | func TestHeaderDecodeBadMagic(t *testing.T) { |
| 82 | h := Header{ |
| 83 | Magic: 0x12345678, |
| 84 | Version: Version, |
| 85 | HeaderLen: HeaderLen, |
| 86 | Kind: KindRequest, |
| 87 | } |
| 88 | var buf [32]byte |
| 89 | h.Encode(buf[:]) |
| 90 | _, err := DecodeHeader(buf[:]) |
| 91 | if err != ErrBadMagic { |
| 92 | t.Fatalf("got %v, want ErrBadMagic", err) |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | func TestHeaderDecodeBadVersion(t *testing.T) { |
| 97 | h := Header{ |
| 98 | Magic: MagicMsg, |
| 99 | Version: 99, |
| 100 | HeaderLen: HeaderLen, |
| 101 | Kind: KindRequest, |
| 102 | } |
| 103 | var buf [32]byte |
| 104 | h.Encode(buf[:]) |
| 105 | _, err := DecodeHeader(buf[:]) |
| 106 | if err != ErrBadVersion { |
| 107 | t.Fatalf("got %v, want ErrBadVersion", err) |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | func TestHeaderDecodeBadHeaderLen(t *testing.T) { |
| 112 | h := Header{ |
| 113 | Magic: MagicMsg, |
| 114 | Version: Version, |
| 115 | HeaderLen: 64, |
| 116 | Kind: KindRequest, |
| 117 | } |
| 118 | var buf [32]byte |
| 119 | h.Encode(buf[:]) |
| 120 | _, err := DecodeHeader(buf[:]) |
| 121 | if err != ErrBadHeaderLen { |
| 122 | t.Fatalf("got %v, want ErrBadHeaderLen", err) |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | func TestHeaderDecodeBadKind(t *testing.T) { |
| 127 | // kind = 0 |
| 128 | h := Header{ |
| 129 | Magic: MagicMsg, |
| 130 | Version: Version, |
| 131 | HeaderLen: HeaderLen, |
| 132 | Kind: 0, |
| 133 | } |
| 134 | var buf [32]byte |
| 135 | h.Encode(buf[:]) |
| 136 | _, err := DecodeHeader(buf[:]) |
| 137 | if err != ErrBadKind { |
| 138 | t.Fatalf("kind=0: got %v, want ErrBadKind", err) |
| 139 | } |
| 140 | |
| 141 | // kind = 4 |
| 142 | h.Kind = 4 |
| 143 | h.Encode(buf[:]) |
| 144 | _, err = DecodeHeader(buf[:]) |
| 145 | if err != ErrBadKind { |
| 146 | t.Fatalf("kind=4: got %v, want ErrBadKind", err) |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | func TestHeaderAllKinds(t *testing.T) { |
| 151 | for k := KindRequest; k <= KindControl; k++ { |
| 152 | h := Header{ |
| 153 | Magic: MagicMsg, |
| 154 | Version: Version, |
| 155 | HeaderLen: HeaderLen, |
| 156 | Kind: k, |
| 157 | } |
| 158 | var buf [32]byte |
| 159 | h.Encode(buf[:]) |
| 160 | out, err := DecodeHeader(buf[:]) |
| 161 | if err != nil { |
| 162 | t.Fatalf("kind=%d: %v", k, err) |
| 163 | } |
| 164 | if out.Kind != k { |
| 165 | t.Fatalf("kind=%d: got %d", k, out.Kind) |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | func TestHeaderWireBytes(t *testing.T) { |
| 171 | h := Header{ |
| 172 | Magic: MagicMsg, |
| 173 | Version: Version, |
| 174 | HeaderLen: HeaderLen, |
| 175 | Kind: KindRequest, |
| 176 | Flags: 0, |
| 177 | Code: MethodCgroupsSnapshot, |
| 178 | TransportStatus: StatusOK, |
| 179 | PayloadLen: 4, |
| 180 | ItemCount: 1, |
| 181 | MessageID: 1, |
| 182 | } |
| 183 | |
| 184 | var buf [32]byte |
| 185 | h.Encode(buf[:]) |
| 186 | |
| 187 | // magic = 0x4e495043 LE: 43 50 49 4e |
| 188 | if !bytes.Equal(buf[0:4], []byte{0x43, 0x50, 0x49, 0x4e}) { |
| 189 | t.Errorf("magic bytes: %x", buf[0:4]) |
| 190 | } |
| 191 | // version = 1 LE: 01 00 |
| 192 | if !bytes.Equal(buf[4:6], []byte{0x01, 0x00}) { |
| 193 | t.Errorf("version bytes: %x", buf[4:6]) |
| 194 | } |
| 195 | // header_len = 32 LE: 20 00 |
| 196 | if !bytes.Equal(buf[6:8], []byte{0x20, 0x00}) { |
| 197 | t.Errorf("header_len bytes: %x", buf[6:8]) |
| 198 | } |
| 199 | // kind = 1 LE: 01 00 |
| 200 | if !bytes.Equal(buf[8:10], []byte{0x01, 0x00}) { |
| 201 | t.Errorf("kind bytes: %x", buf[8:10]) |
| 202 | } |
| 203 | // code = 2 LE: 02 00 |
| 204 | if !bytes.Equal(buf[12:14], []byte{0x02, 0x00}) { |
| 205 | t.Errorf("code bytes: %x", buf[12:14]) |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | // --------------------------------------------------------------------------- |
| 210 | // Chunk continuation header tests |
| 211 | // --------------------------------------------------------------------------- |
| 212 | |
| 213 | func TestChunkHeaderRoundtrip(t *testing.T) { |
| 214 | c := ChunkHeader{ |
| 215 | Magic: MagicChunk, |
| 216 | Version: Version, |
| 217 | Flags: 0, |
| 218 | MessageID: 0x1234567890ABCDEF, |
| 219 | TotalMessageLen: 100000, |
| 220 | ChunkIndex: 3, |
| 221 | ChunkCount: 10, |
| 222 | ChunkPayloadLen: 8192, |
| 223 | } |
| 224 | |
| 225 | var buf [64]byte |
| 226 | n := c.Encode(buf[:]) |
| 227 | if n != 32 { |
| 228 | t.Fatalf("Encode returned %d, want 32", n) |
| 229 | } |
| 230 | |
| 231 | out, err := DecodeChunkHeader(buf[:n]) |
| 232 | if err != nil { |
| 233 | t.Fatalf("Decode error: %v", err) |
| 234 | } |
| 235 | if out != c { |
| 236 | t.Fatalf("roundtrip mismatch:\ngot: %+v\nwant: %+v", out, c) |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | func TestChunkDecodeTruncated(t *testing.T) { |
| 241 | buf := make([]byte, 31) |
| 242 | _, err := DecodeChunkHeader(buf) |
| 243 | if err != ErrTruncated { |
| 244 | t.Fatalf("got %v, want ErrTruncated", err) |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | func TestChunkDecodeBadMagic(t *testing.T) { |
| 249 | c := ChunkHeader{ |
| 250 | Magic: MagicMsg, // wrong magic for chunk |
| 251 | Version: Version, |
| 252 | } |
| 253 | var buf [32]byte |
| 254 | c.Encode(buf[:]) |
| 255 | _, err := DecodeChunkHeader(buf[:]) |
| 256 | if err != ErrBadMagic { |
| 257 | t.Fatalf("got %v, want ErrBadMagic", err) |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | func TestChunkDecodeBadVersion(t *testing.T) { |
| 262 | c := ChunkHeader{ |
| 263 | Magic: MagicChunk, |
| 264 | Version: 2, |
| 265 | } |
| 266 | var buf [32]byte |
| 267 | c.Encode(buf[:]) |
| 268 | _, err := DecodeChunkHeader(buf[:]) |
| 269 | if err != ErrBadVersion { |
| 270 | t.Fatalf("got %v, want ErrBadVersion", err) |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | func TestChunkEncodeTooSmall(t *testing.T) { |
| 275 | c := ChunkHeader{} |
| 276 | var buf [16]byte |
| 277 | if n := c.Encode(buf[:]); n != 0 { |
| 278 | t.Fatalf("Encode returned %d, want 0", n) |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | func TestChunkWireBytes(t *testing.T) { |
| 283 | c := ChunkHeader{ |
| 284 | Magic: MagicChunk, |
| 285 | Version: Version, |
| 286 | Flags: 0, |
| 287 | MessageID: 1, |
| 288 | TotalMessageLen: 256, |
| 289 | ChunkIndex: 1, |
| 290 | ChunkCount: 3, |
| 291 | ChunkPayloadLen: 100, |
| 292 | } |
| 293 | |
| 294 | var buf [32]byte |
| 295 | c.Encode(buf[:]) |
| 296 | |
| 297 | // magic = 0x4e43484b LE: 4b 48 43 4e |
| 298 | if !bytes.Equal(buf[0:4], []byte{0x4b, 0x48, 0x43, 0x4e}) { |
| 299 | t.Errorf("magic bytes: %x", buf[0:4]) |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | // --------------------------------------------------------------------------- |
| 304 | // Batch item directory tests |
| 305 | // --------------------------------------------------------------------------- |
| 306 | |
| 307 | func TestBatchDirRoundtrip(t *testing.T) { |
| 308 | entries := []BatchEntry{ |
| 309 | {Offset: 0, Length: 100}, |
| 310 | {Offset: 104, Length: 200}, |
| 311 | {Offset: 304, Length: 50}, |
| 312 | } |
| 313 | |
| 314 | buf := make([]byte, 24) |
| 315 | n := BatchDirEncode(entries, buf) |
| 316 | if n != 24 { |
| 317 | t.Fatalf("BatchDirEncode returned %d, want 24", n) |
| 318 | } |
| 319 | |
| 320 | out, err := BatchDirDecode(buf, 3, 1000) |
| 321 | if err != nil { |
| 322 | t.Fatalf("BatchDirDecode error: %v", err) |
| 323 | } |
| 324 | for i, e := range entries { |
| 325 | if out[i] != e { |
| 326 | t.Errorf("entry[%d]: got %+v, want %+v", i, out[i], e) |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | func TestBatchDirEncodeTooSmall(t *testing.T) { |
| 332 | entries := []BatchEntry{{Offset: 0, Length: 10}} |
| 333 | buf := make([]byte, 4) |
| 334 | if n := BatchDirEncode(entries, buf); n != 0 { |
| 335 | t.Fatalf("got %d, want 0", n) |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | func TestBatchDirDecodeTruncated(t *testing.T) { |
| 340 | buf := make([]byte, 12) |
| 341 | _, err := BatchDirDecode(buf, 2, 1000) |
| 342 | if err != ErrTruncated { |
| 343 | t.Fatalf("got %v, want ErrTruncated", err) |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | func TestBatchDirDecodeBadAlignment(t *testing.T) { |
| 348 | buf := make([]byte, 8) |
| 349 | ne.PutUint32(buf[0:4], 3) // offset not aligned to 8 |
| 350 | ne.PutUint32(buf[4:8], 10) |
| 351 | _, err := BatchDirDecode(buf, 1, 100) |
| 352 | if err != ErrBadAlignment { |
| 353 | t.Fatalf("got %v, want ErrBadAlignment", err) |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | func TestBatchDirDecodeOutOfBounds(t *testing.T) { |
| 358 | buf := make([]byte, 8) |
| 359 | ne.PutUint32(buf[0:4], 0) |
| 360 | ne.PutUint32(buf[4:8], 200) // exceeds packed area |
| 361 | _, err := BatchDirDecode(buf, 1, 100) |
| 362 | if err != ErrOutOfBounds { |
| 363 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | func TestBatchItemGetBasic(t *testing.T) { |
| 368 | // Build a batch with 2 items using the builder. |
| 369 | buf := make([]byte, 1024) |
| 370 | b := NewBatchBuilder(buf, 2) |
| 371 | |
| 372 | item0 := []byte("hello") |
| 373 | item1 := []byte("world!!!") |
| 374 | |
| 375 | if err := b.Add(item0); err != nil { |
| 376 | t.Fatal(err) |
| 377 | } |
| 378 | if err := b.Add(item1); err != nil { |
| 379 | t.Fatal(err) |
| 380 | } |
| 381 | |
| 382 | total, count := b.Finish() |
| 383 | if count != 2 { |
| 384 | t.Fatalf("count = %d, want 2", count) |
| 385 | } |
| 386 | |
| 387 | // Extract items. |
| 388 | got0, err := BatchItemGet(buf[:total], count, 0) |
| 389 | if err != nil { |
| 390 | t.Fatalf("item 0: %v", err) |
| 391 | } |
| 392 | if !bytes.Equal(got0, item0) { |
| 393 | t.Fatalf("item 0: got %q, want %q", got0, item0) |
| 394 | } |
| 395 | |
| 396 | got1, err := BatchItemGet(buf[:total], count, 1) |
| 397 | if err != nil { |
| 398 | t.Fatalf("item 1: %v", err) |
| 399 | } |
| 400 | if !bytes.Equal(got1, item1) { |
| 401 | t.Fatalf("item 1: got %q, want %q", got1, item1) |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | func TestBatchItemGetOutOfBounds(t *testing.T) { |
| 406 | buf := make([]byte, 16) |
| 407 | _, err := BatchItemGet(buf, 1, 1) // index >= count |
| 408 | if err != ErrOutOfBounds { |
| 409 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | func TestBatchItemGetTruncated(t *testing.T) { |
| 414 | buf := make([]byte, 4) // too small for even 1 directory entry aligned |
| 415 | _, err := BatchItemGet(buf, 1, 0) |
| 416 | if err != ErrTruncated { |
| 417 | t.Fatalf("got %v, want ErrTruncated", err) |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | // --------------------------------------------------------------------------- |
| 422 | // Batch builder tests |
| 423 | // --------------------------------------------------------------------------- |
| 424 | |
| 425 | func TestBatchBuilderOverflowMaxItems(t *testing.T) { |
| 426 | buf := make([]byte, 1024) |
| 427 | b := NewBatchBuilder(buf, 1) |
| 428 | if err := b.Add([]byte("one")); err != nil { |
| 429 | t.Fatal(err) |
| 430 | } |
| 431 | if err := b.Add([]byte("two")); err != ErrOverflow { |
| 432 | t.Fatalf("got %v, want ErrOverflow", err) |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | func TestBatchBuilderOverflowBuffer(t *testing.T) { |
| 437 | buf := make([]byte, 16) // dir = 8 bytes, 8 bytes data |
| 438 | b := NewBatchBuilder(buf, 1) |
| 439 | if err := b.Add(make([]byte, 100)); err != ErrOverflow { |
| 440 | t.Fatalf("got %v, want ErrOverflow", err) |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | func TestBatchBuilderEmpty(t *testing.T) { |
| 445 | buf := make([]byte, 64) |
| 446 | b := NewBatchBuilder(buf, 5) |
| 447 | total, count := b.Finish() |
| 448 | if count != 0 { |
| 449 | t.Fatalf("count = %d, want 0", count) |
| 450 | } |
| 451 | if total != 0 { |
| 452 | t.Fatalf("total = %d, want 0", total) |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | func TestBatchBuilderCompaction(t *testing.T) { |
| 457 | // Reserve space for 10 items, only add 1. |
| 458 | buf := make([]byte, 1024) |
| 459 | b := NewBatchBuilder(buf, 10) |
| 460 | if err := b.Add([]byte("compact")); err != nil { |
| 461 | t.Fatal(err) |
| 462 | } |
| 463 | total, count := b.Finish() |
| 464 | if count != 1 { |
| 465 | t.Fatalf("count = %d, want 1", count) |
| 466 | } |
| 467 | |
| 468 | // Verify the item can be extracted. |
| 469 | got, err := BatchItemGet(buf[:total], count, 0) |
| 470 | if err != nil { |
| 471 | t.Fatal(err) |
| 472 | } |
| 473 | if !bytes.Equal(got, []byte("compact")) { |
| 474 | t.Fatalf("got %q, want %q", got, "compact") |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | // --------------------------------------------------------------------------- |
| 479 | // Hello payload tests |
| 480 | // --------------------------------------------------------------------------- |
| 481 | |
| 482 | func TestHelloRoundtrip(t *testing.T) { |
| 483 | h := Hello{ |
| 484 | LayoutVersion: 1, |
| 485 | Flags: 0, |
| 486 | SupportedProfiles: ProfileBaseline | ProfileSHMFutex, |
| 487 | PreferredProfiles: ProfileSHMFutex, |
| 488 | MaxRequestPayloadBytes: 4096, |
| 489 | MaxRequestBatchItems: 100, |
| 490 | MaxResponsePayloadBytes: 1048576, |
| 491 | MaxResponseBatchItems: 1, |
| 492 | AuthToken: 0xAABBCCDDEEFF0011, |
| 493 | PacketSize: 65536, |
| 494 | } |
| 495 | |
| 496 | var buf [64]byte |
| 497 | n := h.Encode(buf[:]) |
| 498 | if n != 44 { |
| 499 | t.Fatalf("Encode returned %d, want 44", n) |
| 500 | } |
| 501 | |
| 502 | out, err := DecodeHello(buf[:n]) |
| 503 | if err != nil { |
| 504 | t.Fatalf("Decode error: %v", err) |
| 505 | } |
| 506 | if out != h { |
| 507 | t.Fatalf("roundtrip mismatch:\ngot: %+v\nwant: %+v", out, h) |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | func TestHelloEncodeTooSmall(t *testing.T) { |
| 512 | h := Hello{LayoutVersion: 1} |
| 513 | var buf [20]byte |
| 514 | if n := h.Encode(buf[:]); n != 0 { |
| 515 | t.Fatalf("Encode returned %d, want 0", n) |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | func TestHelloDecodeTruncated(t *testing.T) { |
| 520 | buf := make([]byte, 43) |
| 521 | _, err := DecodeHello(buf) |
| 522 | if err != ErrTruncated { |
| 523 | t.Fatalf("got %v, want ErrTruncated", err) |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | func TestHelloDecodeBadLayout(t *testing.T) { |
| 528 | h := Hello{LayoutVersion: 2} |
| 529 | var buf [44]byte |
| 530 | h.Encode(buf[:]) |
| 531 | _, err := DecodeHello(buf[:]) |
| 532 | if err != ErrBadLayout { |
| 533 | t.Fatalf("got %v, want ErrBadLayout", err) |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | func TestHelloPaddingIsZero(t *testing.T) { |
| 538 | h := Hello{ |
| 539 | LayoutVersion: 1, |
| 540 | MaxResponseBatchItems: 0xFFFFFFFF, |
| 541 | AuthToken: 0xAAAAAAAAAAAAAAAA, |
| 542 | } |
| 543 | var buf [44]byte |
| 544 | h.Encode(buf[:]) |
| 545 | |
| 546 | // Padding at offset 28..32 must be zero. |
| 547 | if !bytes.Equal(buf[28:32], []byte{0, 0, 0, 0}) { |
| 548 | t.Errorf("padding not zero: %x", buf[28:32]) |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | func TestHelloDecodeNonzeroPadding(t *testing.T) { |
| 553 | h := Hello{ |
| 554 | LayoutVersion: 1, |
| 555 | SupportedProfiles: ProfileBaseline, |
| 556 | MaxRequestPayloadBytes: 1024, |
| 557 | MaxRequestBatchItems: 1, |
| 558 | MaxResponsePayloadBytes: 1024, |
| 559 | MaxResponseBatchItems: 1, |
| 560 | PacketSize: 65536, |
| 561 | } |
| 562 | var buf [44]byte |
| 563 | h.Encode(buf[:]) |
| 564 | |
| 565 | // Valid first |
| 566 | if _, err := DecodeHello(buf[:]); err != nil { |
| 567 | t.Fatalf("valid hello failed: %v", err) |
| 568 | } |
| 569 | |
| 570 | // Corrupt padding |
| 571 | buf[28] = 0xFF |
| 572 | if _, err := DecodeHello(buf[:]); err != ErrBadLayout { |
| 573 | t.Errorf("nonzero padding: got %v, want ErrBadLayout", err) |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | func TestHelloWireBytes(t *testing.T) { |
| 578 | h := Hello{ |
| 579 | LayoutVersion: 1, |
| 580 | Flags: 0, |
| 581 | SupportedProfiles: ProfileBaseline | ProfileSHMFutex, |
| 582 | PreferredProfiles: ProfileSHMFutex, |
| 583 | MaxRequestPayloadBytes: 4096, |
| 584 | MaxRequestBatchItems: 100, |
| 585 | MaxResponsePayloadBytes: 1048576, |
| 586 | MaxResponseBatchItems: 1, |
| 587 | AuthToken: 0xAABBCCDDEEFF0011, |
| 588 | PacketSize: 65536, |
| 589 | } |
| 590 | var buf [44]byte |
| 591 | h.Encode(buf[:]) |
| 592 | |
| 593 | // supported_profiles = 0x05 LE at offset 4 |
| 594 | if !bytes.Equal(buf[4:8], []byte{0x05, 0x00, 0x00, 0x00}) { |
| 595 | t.Errorf("supported_profiles bytes: %x", buf[4:8]) |
| 596 | } |
| 597 | // auth_token at offset 32 |
| 598 | if !bytes.Equal(buf[32:40], []byte{0x11, 0x00, 0xFF, 0xEE, 0xDD, 0xCC, 0xBB, 0xAA}) { |
| 599 | t.Errorf("auth_token bytes: %x", buf[32:40]) |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | // --------------------------------------------------------------------------- |
| 604 | // Hello-ack payload tests |
| 605 | // --------------------------------------------------------------------------- |
| 606 | |
| 607 | func TestHelloAckRoundtrip(t *testing.T) { |
| 608 | h := HelloAck{ |
| 609 | LayoutVersion: 1, |
| 610 | Flags: 0, |
| 611 | ServerSupportedProfiles: 0x07, |
| 612 | IntersectionProfiles: 0x05, |
| 613 | SelectedProfile: ProfileSHMFutex, |
| 614 | AgreedMaxRequestPayloadBytes: 2048, |
| 615 | AgreedMaxRequestBatchItems: 50, |
| 616 | AgreedMaxResponsePayloadBytes: 65536, |
| 617 | AgreedMaxResponseBatchItems: 1, |
| 618 | AgreedPacketSize: 32768, |
| 619 | } |
| 620 | |
| 621 | var buf [64]byte |
| 622 | n := h.Encode(buf[:]) |
| 623 | if n != 48 { |
| 624 | t.Fatalf("Encode returned %d, want 48", n) |
| 625 | } |
| 626 | |
| 627 | out, err := DecodeHelloAck(buf[:n]) |
| 628 | if err != nil { |
| 629 | t.Fatalf("Decode error: %v", err) |
| 630 | } |
| 631 | if out != h { |
| 632 | t.Fatalf("roundtrip mismatch:\ngot: %+v\nwant: %+v", out, h) |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | func TestHelloAckEncodeTooSmall(t *testing.T) { |
| 637 | h := HelloAck{LayoutVersion: 1} |
| 638 | var buf [20]byte |
| 639 | if n := h.Encode(buf[:]); n != 0 { |
| 640 | t.Fatalf("Encode returned %d, want 0", n) |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | func TestHelloAckDecodeTruncated(t *testing.T) { |
| 645 | buf := make([]byte, 47) |
| 646 | _, err := DecodeHelloAck(buf) |
| 647 | if err != ErrTruncated { |
| 648 | t.Fatalf("got %v, want ErrTruncated", err) |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | func TestHelloAckDecodeBadLayout(t *testing.T) { |
| 653 | h := HelloAck{LayoutVersion: 99} |
| 654 | var buf [48]byte |
| 655 | h.Encode(buf[:]) |
| 656 | _, err := DecodeHelloAck(buf[:]) |
| 657 | if err != ErrBadLayout { |
| 658 | t.Fatalf("got %v, want ErrBadLayout", err) |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | // --------------------------------------------------------------------------- |
| 663 | // Cgroups request tests |
| 664 | // --------------------------------------------------------------------------- |
| 665 | |
| 666 | func TestCgroupsRequestRoundtrip(t *testing.T) { |
| 667 | r := CgroupsRequest{LayoutVersion: 1, Flags: 0} |
| 668 | |
| 669 | var buf [16]byte |
| 670 | n := r.Encode(buf[:]) |
| 671 | if n != 4 { |
| 672 | t.Fatalf("Encode returned %d, want 4", n) |
| 673 | } |
| 674 | |
| 675 | out, err := DecodeCgroupsRequest(buf[:n]) |
| 676 | if err != nil { |
| 677 | t.Fatalf("Decode error: %v", err) |
| 678 | } |
| 679 | if out != r { |
| 680 | t.Fatalf("roundtrip mismatch:\ngot: %+v\nwant: %+v", out, r) |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | func TestCgroupsRequestEncodeTooSmall(t *testing.T) { |
| 685 | r := CgroupsRequest{LayoutVersion: 1} |
| 686 | var buf [2]byte |
| 687 | if n := r.Encode(buf[:]); n != 0 { |
| 688 | t.Fatalf("Encode returned %d, want 0", n) |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | func TestCgroupsRequestDecodeTruncated(t *testing.T) { |
| 693 | buf := make([]byte, 3) |
| 694 | _, err := DecodeCgroupsRequest(buf) |
| 695 | if err != ErrTruncated { |
| 696 | t.Fatalf("got %v, want ErrTruncated", err) |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | func TestCgroupsRequestDecodeBadLayout(t *testing.T) { |
| 701 | r := CgroupsRequest{LayoutVersion: 2} |
| 702 | var buf [4]byte |
| 703 | r.Encode(buf[:]) |
| 704 | _, err := DecodeCgroupsRequest(buf[:]) |
| 705 | if err != ErrBadLayout { |
| 706 | t.Fatalf("got %v, want ErrBadLayout", err) |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | // --------------------------------------------------------------------------- |
| 711 | // CStringView tests |
| 712 | // --------------------------------------------------------------------------- |
| 713 | |
| 714 | func TestCStringViewBasic(t *testing.T) { |
| 715 | data := []byte("hello\x00") |
| 716 | v := NewCStringView(data, 5) |
| 717 | |
| 718 | if v.Len() != 5 { |
| 719 | t.Fatalf("Len() = %d, want 5", v.Len()) |
| 720 | } |
| 721 | if !bytes.Equal(v.Bytes(), []byte("hello")) { |
| 722 | t.Fatalf("Bytes() = %q, want %q", v.Bytes(), "hello") |
| 723 | } |
| 724 | if v.String() != "hello" { |
| 725 | t.Fatalf("String() = %q, want %q", v.String(), "hello") |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | func TestCStringViewEmpty(t *testing.T) { |
| 730 | data := []byte{0} |
| 731 | v := NewCStringView(data, 0) |
| 732 | |
| 733 | if v.Len() != 0 { |
| 734 | t.Fatalf("Len() = %d, want 0", v.Len()) |
| 735 | } |
| 736 | if len(v.Bytes()) != 0 { |
| 737 | t.Fatalf("Bytes() len = %d, want 0", len(v.Bytes())) |
| 738 | } |
| 739 | if v.String() != "" { |
| 740 | t.Fatalf("String() = %q, want empty", v.String()) |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | // --------------------------------------------------------------------------- |
| 745 | // Cgroups snapshot response tests |
| 746 | // --------------------------------------------------------------------------- |
| 747 | |
| 748 | func TestCgroupsResponseEmptyRoundtrip(t *testing.T) { |
| 749 | buf := make([]byte, 8192) |
| 750 | b := NewCgroupsBuilder(buf, 0, 0, 42) |
| 751 | total := b.Finish() |
| 752 | if total != 24 { |
| 753 | t.Fatalf("Finish returned %d, want 24", total) |
| 754 | } |
| 755 | |
| 756 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 757 | if err != nil { |
| 758 | t.Fatalf("Decode error: %v", err) |
| 759 | } |
| 760 | if view.ItemCount != 0 { |
| 761 | t.Fatalf("ItemCount = %d, want 0", view.ItemCount) |
| 762 | } |
| 763 | if view.SystemdEnabled != 0 { |
| 764 | t.Fatalf("SystemdEnabled = %d, want 0", view.SystemdEnabled) |
| 765 | } |
| 766 | if view.Generation != 42 { |
| 767 | t.Fatalf("Generation = %d, want 42", view.Generation) |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | func TestCgroupsResponseSingleItemRoundtrip(t *testing.T) { |
| 772 | buf := make([]byte, 8192) |
| 773 | b := NewCgroupsBuilder(buf, 1, 1, 100) |
| 774 | |
| 775 | name := []byte("init.scope") |
| 776 | path := []byte("/sys/fs/cgroup/init.scope") |
| 777 | if err := b.Add(42, 0x01, 1, name, path); err != nil { |
| 778 | t.Fatal(err) |
| 779 | } |
| 780 | |
| 781 | total := b.Finish() |
| 782 | |
| 783 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 784 | if err != nil { |
| 785 | t.Fatalf("Decode error: %v", err) |
| 786 | } |
| 787 | if view.ItemCount != 1 { |
| 788 | t.Fatalf("ItemCount = %d, want 1", view.ItemCount) |
| 789 | } |
| 790 | if view.SystemdEnabled != 1 { |
| 791 | t.Fatalf("SystemdEnabled = %d, want 1", view.SystemdEnabled) |
| 792 | } |
| 793 | if view.Generation != 100 { |
| 794 | t.Fatalf("Generation = %d, want 100", view.Generation) |
| 795 | } |
| 796 | |
| 797 | item, err := view.Item(0) |
| 798 | if err != nil { |
| 799 | t.Fatalf("Item(0) error: %v", err) |
| 800 | } |
| 801 | if item.Hash != 42 { |
| 802 | t.Fatalf("Hash = %d, want 42", item.Hash) |
| 803 | } |
| 804 | if item.Options != 0x01 { |
| 805 | t.Fatalf("Options = %d, want 1", item.Options) |
| 806 | } |
| 807 | if item.Enabled != 1 { |
| 808 | t.Fatalf("Enabled = %d, want 1", item.Enabled) |
| 809 | } |
| 810 | if item.Name.String() != "init.scope" { |
| 811 | t.Fatalf("Name = %q, want %q", item.Name.String(), "init.scope") |
| 812 | } |
| 813 | if item.Path.String() != "/sys/fs/cgroup/init.scope" { |
| 814 | t.Fatalf("Path = %q, want %q", item.Path.String(), "/sys/fs/cgroup/init.scope") |
| 815 | } |
| 816 | } |
| 817 | |
| 818 | func TestCgroupsResponseMultiItemRoundtrip(t *testing.T) { |
| 819 | buf := make([]byte, 8192) |
| 820 | b := NewCgroupsBuilder(buf, 3, 1, 999) |
| 821 | |
| 822 | if err := b.Add(100, 0, 1, |
| 823 | []byte("init.scope"), |
| 824 | []byte("/sys/fs/cgroup/init.scope")); err != nil { |
| 825 | t.Fatal(err) |
| 826 | } |
| 827 | if err := b.Add(200, 0x02, 0, |
| 828 | []byte("system.slice/docker-abc.scope"), |
| 829 | []byte("/sys/fs/cgroup/system.slice/docker-abc.scope")); err != nil { |
| 830 | t.Fatal(err) |
| 831 | } |
| 832 | if err := b.Add(300, 0, 1, []byte(""), []byte("")); err != nil { |
| 833 | t.Fatal(err) |
| 834 | } |
| 835 | |
| 836 | total := b.Finish() |
| 837 | |
| 838 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 839 | if err != nil { |
| 840 | t.Fatalf("Decode error: %v", err) |
| 841 | } |
| 842 | if view.ItemCount != 3 { |
| 843 | t.Fatalf("ItemCount = %d, want 3", view.ItemCount) |
| 844 | } |
| 845 | if view.SystemdEnabled != 1 { |
| 846 | t.Fatalf("SystemdEnabled = %d, want 1", view.SystemdEnabled) |
| 847 | } |
| 848 | if view.Generation != 999 { |
| 849 | t.Fatalf("Generation = %d, want 999", view.Generation) |
| 850 | } |
| 851 | |
| 852 | // Item 0 |
| 853 | item, err := view.Item(0) |
| 854 | if err != nil { |
| 855 | t.Fatal(err) |
| 856 | } |
| 857 | if item.Hash != 100 { |
| 858 | t.Errorf("item 0 Hash = %d, want 100", item.Hash) |
| 859 | } |
| 860 | if item.Options != 0 { |
| 861 | t.Errorf("item 0 Options = %d, want 0", item.Options) |
| 862 | } |
| 863 | if item.Enabled != 1 { |
| 864 | t.Errorf("item 0 Enabled = %d, want 1", item.Enabled) |
| 865 | } |
| 866 | if item.Name.String() != "init.scope" { |
| 867 | t.Errorf("item 0 Name = %q", item.Name.String()) |
| 868 | } |
| 869 | if item.Path.String() != "/sys/fs/cgroup/init.scope" { |
| 870 | t.Errorf("item 0 Path = %q", item.Path.String()) |
| 871 | } |
| 872 | |
| 873 | // Item 1 |
| 874 | item, err = view.Item(1) |
| 875 | if err != nil { |
| 876 | t.Fatal(err) |
| 877 | } |
| 878 | if item.Hash != 200 { |
| 879 | t.Errorf("item 1 Hash = %d, want 200", item.Hash) |
| 880 | } |
| 881 | if item.Options != 0x02 { |
| 882 | t.Errorf("item 1 Options = %d, want 2", item.Options) |
| 883 | } |
| 884 | if item.Enabled != 0 { |
| 885 | t.Errorf("item 1 Enabled = %d, want 0", item.Enabled) |
| 886 | } |
| 887 | if item.Name.String() != "system.slice/docker-abc.scope" { |
| 888 | t.Errorf("item 1 Name = %q", item.Name.String()) |
| 889 | } |
| 890 | |
| 891 | // Item 2 (empty strings) |
| 892 | item, err = view.Item(2) |
| 893 | if err != nil { |
| 894 | t.Fatal(err) |
| 895 | } |
| 896 | if item.Hash != 300 { |
| 897 | t.Errorf("item 2 Hash = %d, want 300", item.Hash) |
| 898 | } |
| 899 | if item.Name.Len() != 0 { |
| 900 | t.Errorf("item 2 Name.Len() = %d, want 0", item.Name.Len()) |
| 901 | } |
| 902 | if item.Path.Len() != 0 { |
| 903 | t.Errorf("item 2 Path.Len() = %d, want 0", item.Path.Len()) |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | func TestCgroupsResponseCompaction(t *testing.T) { |
| 908 | // Reserve space for 100 items, add only 2. |
| 909 | buf := make([]byte, 8192) |
| 910 | b := NewCgroupsBuilder(buf, 100, 0, 7) |
| 911 | |
| 912 | if err := b.Add(1, 0, 1, []byte("a"), []byte("b")); err != nil { |
| 913 | t.Fatal(err) |
| 914 | } |
| 915 | if err := b.Add(2, 0, 1, []byte("c"), []byte("d")); err != nil { |
| 916 | t.Fatal(err) |
| 917 | } |
| 918 | |
| 919 | total := b.Finish() |
| 920 | |
| 921 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 922 | if err != nil { |
| 923 | t.Fatalf("Decode error: %v", err) |
| 924 | } |
| 925 | if view.ItemCount != 2 { |
| 926 | t.Fatalf("ItemCount = %d, want 2", view.ItemCount) |
| 927 | } |
| 928 | |
| 929 | item, err := view.Item(0) |
| 930 | if err != nil { |
| 931 | t.Fatal(err) |
| 932 | } |
| 933 | if item.Name.String() != "a" { |
| 934 | t.Fatalf("item 0 Name = %q, want %q", item.Name.String(), "a") |
| 935 | } |
| 936 | |
| 937 | item, err = view.Item(1) |
| 938 | if err != nil { |
| 939 | t.Fatal(err) |
| 940 | } |
| 941 | if item.Name.String() != "c" { |
| 942 | t.Fatalf("item 1 Name = %q, want %q", item.Name.String(), "c") |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | func TestCgroupsResponseItemOutOfBounds(t *testing.T) { |
| 947 | buf := make([]byte, 8192) |
| 948 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 949 | if err := b.Add(1, 0, 1, []byte("x"), []byte("y")); err != nil { |
| 950 | t.Fatal(err) |
| 951 | } |
| 952 | total := b.Finish() |
| 953 | |
| 954 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 955 | if err != nil { |
| 956 | t.Fatal(err) |
| 957 | } |
| 958 | |
| 959 | _, err = view.Item(1) // index out of bounds |
| 960 | if err != ErrOutOfBounds { |
| 961 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | func TestCgroupsResponseDecodeTruncated(t *testing.T) { |
| 966 | buf := make([]byte, 23) // less than 24-byte header |
| 967 | _, err := DecodeCgroupsResponse(buf) |
| 968 | if err != ErrTruncated { |
| 969 | t.Fatalf("got %v, want ErrTruncated", err) |
| 970 | } |
| 971 | } |
| 972 | |
| 973 | func TestCgroupsResponseDecodeBadLayout(t *testing.T) { |
| 974 | buf := make([]byte, 24) |
| 975 | ne.PutUint16(buf[0:2], 99) // bad layout_version |
| 976 | _, err := DecodeCgroupsResponse(buf) |
| 977 | if err != ErrBadLayout { |
| 978 | t.Fatalf("got %v, want ErrBadLayout", err) |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | func TestCgroupsResponseDecodeDirectoryTruncated(t *testing.T) { |
| 983 | buf := make([]byte, 28) // 24 header + 4 bytes, not enough for 1 dir entry (8) |
| 984 | ne.PutUint16(buf[0:2], 1) // layout_version |
| 985 | ne.PutUint16(buf[2:4], 0) // flags |
| 986 | ne.PutUint32(buf[4:8], 1) // item_count = 1 |
| 987 | ne.PutUint32(buf[8:12], 0) // systemd_enabled |
| 988 | ne.PutUint32(buf[12:16], 0) // reserved |
| 989 | ne.PutUint64(buf[16:24], 0) // generation |
| 990 | |
| 991 | _, err := DecodeCgroupsResponse(buf) |
| 992 | if err != ErrTruncated { |
| 993 | t.Fatalf("got %v, want ErrTruncated", err) |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | func TestCgroupsResponseDecodeItemBadAlignment(t *testing.T) { |
| 998 | // Create a payload with a directory entry that has a non-aligned offset. |
| 999 | buf := make([]byte, 128) |
| 1000 | ne.PutUint16(buf[0:2], 1) // layout_version |
| 1001 | ne.PutUint16(buf[2:4], 0) // flags |
| 1002 | ne.PutUint32(buf[4:8], 1) // item_count = 1 |
| 1003 | ne.PutUint32(buf[8:12], 0) // systemd_enabled |
| 1004 | ne.PutUint32(buf[12:16], 0) // reserved |
| 1005 | ne.PutUint64(buf[16:24], 0) // generation |
| 1006 | |
| 1007 | // Directory entry at offset 24: offset=3 (not aligned), length=32 |
| 1008 | ne.PutUint32(buf[24:28], 3) // bad alignment |
| 1009 | ne.PutUint32(buf[28:32], 32) |
| 1010 | |
| 1011 | _, err := DecodeCgroupsResponse(buf) |
| 1012 | if err != ErrBadAlignment { |
| 1013 | t.Fatalf("got %v, want ErrBadAlignment", err) |
| 1014 | } |
| 1015 | } |
| 1016 | |
| 1017 | func TestCgroupsResponseDecodeItemOutOfBounds(t *testing.T) { |
| 1018 | buf := make([]byte, 64) |
| 1019 | ne.PutUint16(buf[0:2], 1) |
| 1020 | ne.PutUint16(buf[2:4], 0) |
| 1021 | ne.PutUint32(buf[4:8], 1) // item_count = 1 |
| 1022 | ne.PutUint32(buf[8:12], 0) |
| 1023 | ne.PutUint32(buf[12:16], 0) |
| 1024 | ne.PutUint64(buf[16:24], 0) |
| 1025 | |
| 1026 | // Dir entry: offset=0, length=1000 (exceeds buffer) |
| 1027 | ne.PutUint32(buf[24:28], 0) |
| 1028 | ne.PutUint32(buf[28:32], 1000) |
| 1029 | |
| 1030 | _, err := DecodeCgroupsResponse(buf) |
| 1031 | if err != ErrOutOfBounds { |
| 1032 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | func TestCgroupsResponseDecodeItemTooSmall(t *testing.T) { |
| 1037 | // Item is present but smaller than 32-byte item header. |
| 1038 | buf := make([]byte, 64) |
| 1039 | ne.PutUint16(buf[0:2], 1) |
| 1040 | ne.PutUint16(buf[2:4], 0) |
| 1041 | ne.PutUint32(buf[4:8], 1) // item_count = 1 |
| 1042 | ne.PutUint32(buf[8:12], 0) |
| 1043 | ne.PutUint32(buf[12:16], 0) |
| 1044 | ne.PutUint64(buf[16:24], 0) |
| 1045 | |
| 1046 | // Dir entry: offset=0, length=16 (< 32 item header) |
| 1047 | ne.PutUint32(buf[24:28], 0) |
| 1048 | ne.PutUint32(buf[28:32], 16) |
| 1049 | |
| 1050 | _, err := DecodeCgroupsResponse(buf) |
| 1051 | if err != ErrTruncated { |
| 1052 | t.Fatalf("got %v, want ErrTruncated", err) |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | func TestCgroupsResponseItemBadLayout(t *testing.T) { |
| 1057 | // Build a valid response, then corrupt the item's layout_version. |
| 1058 | buf := make([]byte, 8192) |
| 1059 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1060 | if err := b.Add(1, 0, 1, []byte("x"), []byte("y")); err != nil { |
| 1061 | t.Fatal(err) |
| 1062 | } |
| 1063 | total := b.Finish() |
| 1064 | |
| 1065 | // Find the item start and corrupt layout_version. |
| 1066 | dirBase := cgroupsRespHdr |
| 1067 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1068 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1069 | itemStart := packedStart + itemOff |
| 1070 | ne.PutUint16(buf[itemStart:itemStart+2], 99) // corrupt layout_version |
| 1071 | |
| 1072 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1073 | if err != nil { |
| 1074 | t.Fatal(err) |
| 1075 | } |
| 1076 | |
| 1077 | _, err = view.Item(0) |
| 1078 | if err != ErrBadLayout { |
| 1079 | t.Fatalf("got %v, want ErrBadLayout", err) |
| 1080 | } |
| 1081 | } |
| 1082 | |
| 1083 | func TestCgroupsResponseItemMissingNul(t *testing.T) { |
| 1084 | // Build a valid response, then overwrite the name's NUL terminator. |
| 1085 | buf := make([]byte, 8192) |
| 1086 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1087 | if err := b.Add(1, 0, 1, []byte("test"), []byte("path")); err != nil { |
| 1088 | t.Fatal(err) |
| 1089 | } |
| 1090 | total := b.Finish() |
| 1091 | |
| 1092 | // Find item and overwrite the NUL after "test". |
| 1093 | dirBase := cgroupsRespHdr |
| 1094 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1095 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1096 | itemStart := packedStart + itemOff |
| 1097 | // name is at offset 32 within the item, length 4, NUL at 36. |
| 1098 | buf[itemStart+32+4] = 'X' // overwrite NUL |
| 1099 | |
| 1100 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1101 | if err != nil { |
| 1102 | t.Fatal(err) |
| 1103 | } |
| 1104 | _, err = view.Item(0) |
| 1105 | if err != ErrMissingNul { |
| 1106 | t.Fatalf("got %v, want ErrMissingNul", err) |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | func TestCgroupsResponseItemNameOutOfBounds(t *testing.T) { |
| 1111 | // Build valid, then corrupt name_offset to point beyond item bounds. |
| 1112 | buf := make([]byte, 8192) |
| 1113 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1114 | if err := b.Add(1, 0, 1, []byte("x"), []byte("y")); err != nil { |
| 1115 | t.Fatal(err) |
| 1116 | } |
| 1117 | total := b.Finish() |
| 1118 | |
| 1119 | dirBase := cgroupsRespHdr |
| 1120 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1121 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1122 | itemStart := packedStart + itemOff |
| 1123 | // Corrupt name_offset to a huge value. |
| 1124 | ne.PutUint32(buf[itemStart+16:itemStart+20], 9999) |
| 1125 | |
| 1126 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1127 | if err != nil { |
| 1128 | t.Fatal(err) |
| 1129 | } |
| 1130 | _, err = view.Item(0) |
| 1131 | if err != ErrOutOfBounds { |
| 1132 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | func TestCgroupsResponseItemNameOffsetBelowHeader(t *testing.T) { |
| 1137 | // name_offset < 32 (item header size). |
| 1138 | buf := make([]byte, 8192) |
| 1139 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1140 | if err := b.Add(1, 0, 1, []byte("x"), []byte("y")); err != nil { |
| 1141 | t.Fatal(err) |
| 1142 | } |
| 1143 | total := b.Finish() |
| 1144 | |
| 1145 | dirBase := cgroupsRespHdr |
| 1146 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1147 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1148 | itemStart := packedStart + itemOff |
| 1149 | ne.PutUint32(buf[itemStart+16:itemStart+20], 4) // below 32 |
| 1150 | |
| 1151 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1152 | if err != nil { |
| 1153 | t.Fatal(err) |
| 1154 | } |
| 1155 | _, err = view.Item(0) |
| 1156 | if err != ErrOutOfBounds { |
| 1157 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | func TestCgroupsBuilderOverflowMaxItems(t *testing.T) { |
| 1162 | buf := make([]byte, 8192) |
| 1163 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1164 | if err := b.Add(1, 0, 1, []byte("a"), []byte("b")); err != nil { |
| 1165 | t.Fatal(err) |
| 1166 | } |
| 1167 | if err := b.Add(2, 0, 1, []byte("c"), []byte("d")); err != ErrOverflow { |
| 1168 | t.Fatalf("got %v, want ErrOverflow", err) |
| 1169 | } |
| 1170 | } |
| 1171 | |
| 1172 | func TestCgroupsBuilderOverflowBuffer(t *testing.T) { |
| 1173 | buf := make([]byte, 40) // too small for header + dir + item |
| 1174 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1175 | err := b.Add(1, 0, 1, []byte("long-name-that-wont-fit"), []byte("long-path-too")) |
| 1176 | if err != ErrOverflow { |
| 1177 | t.Fatalf("got %v, want ErrOverflow", err) |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | func TestCgroupsResponseEmptyStrings(t *testing.T) { |
| 1182 | buf := make([]byte, 8192) |
| 1183 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1184 | if err := b.Add(42, 0, 1, []byte(""), []byte("")); err != nil { |
| 1185 | t.Fatal(err) |
| 1186 | } |
| 1187 | total := b.Finish() |
| 1188 | |
| 1189 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1190 | if err != nil { |
| 1191 | t.Fatal(err) |
| 1192 | } |
| 1193 | |
| 1194 | item, err := view.Item(0) |
| 1195 | if err != nil { |
| 1196 | t.Fatal(err) |
| 1197 | } |
| 1198 | if item.Name.Len() != 0 { |
| 1199 | t.Fatalf("Name.Len() = %d, want 0", item.Name.Len()) |
| 1200 | } |
| 1201 | if item.Path.Len() != 0 { |
| 1202 | t.Fatalf("Path.Len() = %d, want 0", item.Path.Len()) |
| 1203 | } |
| 1204 | if item.Name.String() != "" { |
| 1205 | t.Fatalf("Name.String() = %q, want empty", item.Name.String()) |
| 1206 | } |
| 1207 | if item.Path.String() != "" { |
| 1208 | t.Fatalf("Path.String() = %q, want empty", item.Path.String()) |
| 1209 | } |
| 1210 | } |
| 1211 | |
| 1212 | // --------------------------------------------------------------------------- |
| 1213 | // Interop reference: test values matching C and Rust interop binaries |
| 1214 | // --------------------------------------------------------------------------- |
| 1215 | |
| 1216 | func TestInteropHeaderValues(t *testing.T) { |
| 1217 | h := Header{ |
| 1218 | Magic: MagicMsg, |
| 1219 | Version: Version, |
| 1220 | HeaderLen: HeaderLen, |
| 1221 | Kind: KindRequest, |
| 1222 | Flags: FlagBatch, |
| 1223 | Code: MethodCgroupsSnapshot, |
| 1224 | TransportStatus: StatusOK, |
| 1225 | PayloadLen: 12345, |
| 1226 | ItemCount: 42, |
| 1227 | MessageID: 0xDEADBEEFCAFEBABE, |
| 1228 | } |
| 1229 | |
| 1230 | var buf [32]byte |
| 1231 | h.Encode(buf[:]) |
| 1232 | |
| 1233 | // Decode and verify all fields match. |
| 1234 | out, err := DecodeHeader(buf[:]) |
| 1235 | if err != nil { |
| 1236 | t.Fatal(err) |
| 1237 | } |
| 1238 | if out.Magic != MagicMsg { |
| 1239 | t.Errorf("magic = %x", out.Magic) |
| 1240 | } |
| 1241 | if out.PayloadLen != 12345 { |
| 1242 | t.Errorf("payload_len = %d", out.PayloadLen) |
| 1243 | } |
| 1244 | if out.ItemCount != 42 { |
| 1245 | t.Errorf("item_count = %d", out.ItemCount) |
| 1246 | } |
| 1247 | if out.MessageID != 0xDEADBEEFCAFEBABE { |
| 1248 | t.Errorf("message_id = %x", out.MessageID) |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | func TestInteropChunkValues(t *testing.T) { |
| 1253 | c := ChunkHeader{ |
| 1254 | Magic: MagicChunk, |
| 1255 | Version: Version, |
| 1256 | Flags: 0, |
| 1257 | MessageID: 0x1234567890ABCDEF, |
| 1258 | TotalMessageLen: 100000, |
| 1259 | ChunkIndex: 3, |
| 1260 | ChunkCount: 10, |
| 1261 | ChunkPayloadLen: 8192, |
| 1262 | } |
| 1263 | |
| 1264 | var buf [32]byte |
| 1265 | c.Encode(buf[:]) |
| 1266 | |
| 1267 | out, err := DecodeChunkHeader(buf[:]) |
| 1268 | if err != nil { |
| 1269 | t.Fatal(err) |
| 1270 | } |
| 1271 | if out.MessageID != 0x1234567890ABCDEF { |
| 1272 | t.Errorf("message_id = %x", out.MessageID) |
| 1273 | } |
| 1274 | if out.TotalMessageLen != 100000 { |
| 1275 | t.Errorf("total_message_len = %d", out.TotalMessageLen) |
| 1276 | } |
| 1277 | if out.ChunkIndex != 3 { |
| 1278 | t.Errorf("chunk_index = %d", out.ChunkIndex) |
| 1279 | } |
| 1280 | if out.ChunkCount != 10 { |
| 1281 | t.Errorf("chunk_count = %d", out.ChunkCount) |
| 1282 | } |
| 1283 | if out.ChunkPayloadLen != 8192 { |
| 1284 | t.Errorf("chunk_payload_len = %d", out.ChunkPayloadLen) |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | func TestInteropHelloValues(t *testing.T) { |
| 1289 | h := Hello{ |
| 1290 | LayoutVersion: 1, |
| 1291 | Flags: 0, |
| 1292 | SupportedProfiles: ProfileBaseline | ProfileSHMFutex, |
| 1293 | PreferredProfiles: ProfileSHMFutex, |
| 1294 | MaxRequestPayloadBytes: 4096, |
| 1295 | MaxRequestBatchItems: 100, |
| 1296 | MaxResponsePayloadBytes: 1048576, |
| 1297 | MaxResponseBatchItems: 1, |
| 1298 | AuthToken: 0xAABBCCDDEEFF0011, |
| 1299 | PacketSize: 65536, |
| 1300 | } |
| 1301 | |
| 1302 | var buf [44]byte |
| 1303 | h.Encode(buf[:]) |
| 1304 | |
| 1305 | out, err := DecodeHello(buf[:]) |
| 1306 | if err != nil { |
| 1307 | t.Fatal(err) |
| 1308 | } |
| 1309 | if out.SupportedProfiles != 0x05 { |
| 1310 | t.Errorf("supported = %x", out.SupportedProfiles) |
| 1311 | } |
| 1312 | if out.AuthToken != 0xAABBCCDDEEFF0011 { |
| 1313 | t.Errorf("auth_token = %x", out.AuthToken) |
| 1314 | } |
| 1315 | if out.PacketSize != 65536 { |
| 1316 | t.Errorf("packet_size = %d", out.PacketSize) |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | func TestInteropHelloAckValues(t *testing.T) { |
| 1321 | h := HelloAck{ |
| 1322 | LayoutVersion: 1, |
| 1323 | Flags: 0, |
| 1324 | ServerSupportedProfiles: 0x07, |
| 1325 | IntersectionProfiles: 0x05, |
| 1326 | SelectedProfile: ProfileSHMFutex, |
| 1327 | AgreedMaxRequestPayloadBytes: 2048, |
| 1328 | AgreedMaxRequestBatchItems: 50, |
| 1329 | AgreedMaxResponsePayloadBytes: 65536, |
| 1330 | AgreedMaxResponseBatchItems: 1, |
| 1331 | AgreedPacketSize: 32768, |
| 1332 | } |
| 1333 | |
| 1334 | var buf [48]byte |
| 1335 | h.Encode(buf[:]) |
| 1336 | |
| 1337 | out, err := DecodeHelloAck(buf[:]) |
| 1338 | if err != nil { |
| 1339 | t.Fatal(err) |
| 1340 | } |
| 1341 | if out.ServerSupportedProfiles != 0x07 { |
| 1342 | t.Errorf("server_supported = %x", out.ServerSupportedProfiles) |
| 1343 | } |
| 1344 | if out.AgreedPacketSize != 32768 { |
| 1345 | t.Errorf("agreed_packet_size = %d", out.AgreedPacketSize) |
| 1346 | } |
| 1347 | } |
| 1348 | |
| 1349 | func TestInteropCgroupsResponseValues(t *testing.T) { |
| 1350 | buf := make([]byte, 8192) |
| 1351 | b := NewCgroupsBuilder(buf, 3, 1, 999) |
| 1352 | |
| 1353 | if err := b.Add(100, 0, 1, |
| 1354 | []byte("init.scope"), |
| 1355 | []byte("/sys/fs/cgroup/init.scope")); err != nil { |
| 1356 | t.Fatal(err) |
| 1357 | } |
| 1358 | if err := b.Add(200, 0x02, 0, |
| 1359 | []byte("system.slice/docker-abc.scope"), |
| 1360 | []byte("/sys/fs/cgroup/system.slice/docker-abc.scope")); err != nil { |
| 1361 | t.Fatal(err) |
| 1362 | } |
| 1363 | if err := b.Add(300, 0, 1, []byte(""), []byte("")); err != nil { |
| 1364 | t.Fatal(err) |
| 1365 | } |
| 1366 | |
| 1367 | total := b.Finish() |
| 1368 | |
| 1369 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1370 | if err != nil { |
| 1371 | t.Fatal(err) |
| 1372 | } |
| 1373 | if view.ItemCount != 3 { |
| 1374 | t.Fatalf("ItemCount = %d", view.ItemCount) |
| 1375 | } |
| 1376 | if view.SystemdEnabled != 1 { |
| 1377 | t.Fatalf("SystemdEnabled = %d", view.SystemdEnabled) |
| 1378 | } |
| 1379 | if view.Generation != 999 { |
| 1380 | t.Fatalf("Generation = %d", view.Generation) |
| 1381 | } |
| 1382 | |
| 1383 | item0, _ := view.Item(0) |
| 1384 | if item0.Hash != 100 || item0.Name.String() != "init.scope" { |
| 1385 | t.Errorf("item 0: hash=%d name=%q", item0.Hash, item0.Name.String()) |
| 1386 | } |
| 1387 | |
| 1388 | item1, _ := view.Item(1) |
| 1389 | if item1.Hash != 200 || item1.Options != 0x02 || item1.Enabled != 0 { |
| 1390 | t.Errorf("item 1: hash=%d options=%d enabled=%d", |
| 1391 | item1.Hash, item1.Options, item1.Enabled) |
| 1392 | } |
| 1393 | if item1.Name.String() != "system.slice/docker-abc.scope" { |
| 1394 | t.Errorf("item 1 name: %q", item1.Name.String()) |
| 1395 | } |
| 1396 | |
| 1397 | item2, _ := view.Item(2) |
| 1398 | if item2.Hash != 300 || item2.Name.Len() != 0 || item2.Path.Len() != 0 { |
| 1399 | t.Errorf("item 2: hash=%d namelen=%d pathlen=%d", |
| 1400 | item2.Hash, item2.Name.Len(), item2.Path.Len()) |
| 1401 | } |
| 1402 | } |
| 1403 | |
| 1404 | func TestInteropCgroupsResponseEmptyValues(t *testing.T) { |
| 1405 | buf := make([]byte, 8192) |
| 1406 | b := NewCgroupsBuilder(buf, 0, 0, 42) |
| 1407 | total := b.Finish() |
| 1408 | |
| 1409 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1410 | if err != nil { |
| 1411 | t.Fatal(err) |
| 1412 | } |
| 1413 | if view.ItemCount != 0 { |
| 1414 | t.Errorf("ItemCount = %d", view.ItemCount) |
| 1415 | } |
| 1416 | if view.SystemdEnabled != 0 { |
| 1417 | t.Errorf("SystemdEnabled = %d", view.SystemdEnabled) |
| 1418 | } |
| 1419 | if view.Generation != 42 { |
| 1420 | t.Errorf("Generation = %d", view.Generation) |
| 1421 | } |
| 1422 | } |
| 1423 | |
| 1424 | // --------------------------------------------------------------------------- |
| 1425 | // Large snapshot test |
| 1426 | // --------------------------------------------------------------------------- |
| 1427 | |
| 1428 | func TestCgroupsResponseLargeSnapshot(t *testing.T) { |
| 1429 | const n = 200 |
| 1430 | buf := make([]byte, 1024*1024) |
| 1431 | b := NewCgroupsBuilder(buf, n, 1, 12345) |
| 1432 | |
| 1433 | for i := range n { |
| 1434 | name := []byte("cgroup-" + string(rune('A'+i%26))) |
| 1435 | path := []byte("/sys/fs/cgroup/system.slice/cgroup-" + string(rune('A'+i%26))) |
| 1436 | if err := b.Add(uint32(i), uint32(i%4), uint32(i%2), name, path); err != nil { |
| 1437 | t.Fatalf("item %d: %v", i, err) |
| 1438 | } |
| 1439 | } |
| 1440 | |
| 1441 | total := b.Finish() |
| 1442 | |
| 1443 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1444 | if err != nil { |
| 1445 | t.Fatal(err) |
| 1446 | } |
| 1447 | if view.ItemCount != n { |
| 1448 | t.Fatalf("ItemCount = %d, want %d", view.ItemCount, n) |
| 1449 | } |
| 1450 | |
| 1451 | for i := range uint32(n) { |
| 1452 | item, err := view.Item(i) |
| 1453 | if err != nil { |
| 1454 | t.Fatalf("item %d: %v", i, err) |
| 1455 | } |
| 1456 | if item.Hash != i { |
| 1457 | t.Errorf("item %d: hash = %d", i, item.Hash) |
| 1458 | } |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | // --------------------------------------------------------------------------- |
| 1463 | // Error string tests (ensure errors have useful messages) |
| 1464 | // --------------------------------------------------------------------------- |
| 1465 | |
| 1466 | func TestErrorStrings(t *testing.T) { |
| 1467 | errs := []error{ |
| 1468 | ErrTruncated, ErrBadMagic, ErrBadVersion, ErrBadHeaderLen, |
| 1469 | ErrBadKind, ErrBadLayout, ErrOutOfBounds, ErrMissingNul, |
| 1470 | ErrBadAlignment, ErrBadItemCount, ErrOverflow, |
| 1471 | } |
| 1472 | for _, e := range errs { |
| 1473 | if e.Error() == "" { |
| 1474 | t.Errorf("error has empty string: %v", e) |
| 1475 | } |
| 1476 | } |
| 1477 | } |
| 1478 | |
| 1479 | // --------------------------------------------------------------------------- |
| 1480 | // Decode from zero/garbage bytes (robustness) |
| 1481 | // --------------------------------------------------------------------------- |
| 1482 | |
| 1483 | func TestDecodeZeroBytes(t *testing.T) { |
| 1484 | buf := make([]byte, 128) |
| 1485 | |
| 1486 | _, err := DecodeHeader(buf) |
| 1487 | if err == nil { |
| 1488 | t.Error("expected error for zero header") |
| 1489 | } |
| 1490 | |
| 1491 | _, err = DecodeChunkHeader(buf) |
| 1492 | if err == nil { |
| 1493 | t.Error("expected error for zero chunk header") |
| 1494 | } |
| 1495 | |
| 1496 | _, err = DecodeHello(buf) |
| 1497 | if err == nil { |
| 1498 | t.Error("expected error for zero hello") |
| 1499 | } |
| 1500 | |
| 1501 | _, err = DecodeHelloAck(buf) |
| 1502 | if err == nil { |
| 1503 | t.Error("expected error for zero hello_ack") |
| 1504 | } |
| 1505 | |
| 1506 | _, err = DecodeCgroupsRequest(buf) |
| 1507 | if err == nil { |
| 1508 | t.Error("expected error for zero cgroups_req") |
| 1509 | } |
| 1510 | |
| 1511 | _, err = DecodeCgroupsResponse(buf) |
| 1512 | if err == nil { |
| 1513 | t.Error("expected error for zero cgroups_resp") |
| 1514 | } |
| 1515 | } |
| 1516 | |
| 1517 | func TestDecodeGarbage(t *testing.T) { |
| 1518 | buf := make([]byte, 128) |
| 1519 | for i := range buf { |
| 1520 | buf[i] = 0xFF |
| 1521 | } |
| 1522 | |
| 1523 | _, err := DecodeHeader(buf) |
| 1524 | if err == nil { |
| 1525 | t.Error("expected error for garbage header") |
| 1526 | } |
| 1527 | |
| 1528 | _, err = DecodeChunkHeader(buf) |
| 1529 | if err == nil { |
| 1530 | t.Error("expected error for garbage chunk header") |
| 1531 | } |
| 1532 | |
| 1533 | _, err = DecodeHello(buf) |
| 1534 | if err == nil { |
| 1535 | t.Error("expected error for garbage hello") |
| 1536 | } |
| 1537 | |
| 1538 | _, err = DecodeHelloAck(buf) |
| 1539 | if err == nil { |
| 1540 | t.Error("expected error for garbage hello_ack") |
| 1541 | } |
| 1542 | |
| 1543 | _, err = DecodeCgroupsRequest(buf) |
| 1544 | if err == nil { |
| 1545 | t.Error("expected error for garbage cgroups_req") |
| 1546 | } |
| 1547 | |
| 1548 | _, err = DecodeCgroupsResponse(buf) |
| 1549 | if err == nil { |
| 1550 | t.Error("expected error for garbage cgroups_resp") |
| 1551 | } |
| 1552 | } |
| 1553 | |
| 1554 | func TestDecodeEmptyBuf(t *testing.T) { |
| 1555 | empty := []byte{} |
| 1556 | if _, err := DecodeHeader(empty); err != ErrTruncated { |
| 1557 | t.Errorf("header: got %v", err) |
| 1558 | } |
| 1559 | if _, err := DecodeChunkHeader(empty); err != ErrTruncated { |
| 1560 | t.Errorf("chunk: got %v", err) |
| 1561 | } |
| 1562 | if _, err := DecodeHello(empty); err != ErrTruncated { |
| 1563 | t.Errorf("hello: got %v", err) |
| 1564 | } |
| 1565 | if _, err := DecodeHelloAck(empty); err != ErrTruncated { |
| 1566 | t.Errorf("hello_ack: got %v", err) |
| 1567 | } |
| 1568 | if _, err := DecodeCgroupsRequest(empty); err != ErrTruncated { |
| 1569 | t.Errorf("cgroups_req: got %v", err) |
| 1570 | } |
| 1571 | if _, err := DecodeCgroupsResponse(empty); err != ErrTruncated { |
| 1572 | t.Errorf("cgroups_resp: got %v", err) |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | // --------------------------------------------------------------------------- |
| 1577 | // Path-level string validation in cgroups item |
| 1578 | // --------------------------------------------------------------------------- |
| 1579 | |
| 1580 | func TestCgroupsResponseItemPathMissingNul(t *testing.T) { |
| 1581 | buf := make([]byte, 8192) |
| 1582 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1583 | if err := b.Add(1, 0, 1, []byte("ok"), []byte("bad")); err != nil { |
| 1584 | t.Fatal(err) |
| 1585 | } |
| 1586 | total := b.Finish() |
| 1587 | |
| 1588 | // Overwrite the NUL after "bad" (the path string). |
| 1589 | dirBase := cgroupsRespHdr |
| 1590 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1591 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1592 | itemStart := packedStart + itemOff |
| 1593 | |
| 1594 | // path_offset is at item+24, path_len at item+28. |
| 1595 | pathOff := int(ne.Uint32(buf[itemStart+24 : itemStart+28])) |
| 1596 | pathLen := int(ne.Uint32(buf[itemStart+28 : itemStart+32])) |
| 1597 | buf[itemStart+pathOff+pathLen] = 'X' // corrupt NUL |
| 1598 | |
| 1599 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1600 | if err != nil { |
| 1601 | t.Fatal(err) |
| 1602 | } |
| 1603 | _, err = view.Item(0) |
| 1604 | if err != ErrMissingNul { |
| 1605 | t.Fatalf("got %v, want ErrMissingNul", err) |
| 1606 | } |
| 1607 | } |
| 1608 | |
| 1609 | func TestCgroupsResponseItemPathOutOfBounds(t *testing.T) { |
| 1610 | buf := make([]byte, 8192) |
| 1611 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1612 | if err := b.Add(1, 0, 1, []byte("x"), []byte("y")); err != nil { |
| 1613 | t.Fatal(err) |
| 1614 | } |
| 1615 | total := b.Finish() |
| 1616 | |
| 1617 | dirBase := cgroupsRespHdr |
| 1618 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1619 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1620 | itemStart := packedStart + itemOff |
| 1621 | ne.PutUint32(buf[itemStart+24:itemStart+28], 9999) // corrupt path_offset |
| 1622 | |
| 1623 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1624 | if err != nil { |
| 1625 | t.Fatal(err) |
| 1626 | } |
| 1627 | _, err = view.Item(0) |
| 1628 | if err != ErrOutOfBounds { |
| 1629 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 1630 | } |
| 1631 | } |
| 1632 | |
| 1633 | func TestCgroupsResponseItemPathOffsetBelowHeader(t *testing.T) { |
| 1634 | buf := make([]byte, 8192) |
| 1635 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1636 | if err := b.Add(1, 0, 1, []byte("x"), []byte("y")); err != nil { |
| 1637 | t.Fatal(err) |
| 1638 | } |
| 1639 | total := b.Finish() |
| 1640 | |
| 1641 | dirBase := cgroupsRespHdr |
| 1642 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1643 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1644 | itemStart := packedStart + itemOff |
| 1645 | ne.PutUint32(buf[itemStart+24:itemStart+28], 4) // below 32 |
| 1646 | |
| 1647 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1648 | if err != nil { |
| 1649 | t.Fatal(err) |
| 1650 | } |
| 1651 | _, err = view.Item(0) |
| 1652 | if err != ErrOutOfBounds { |
| 1653 | t.Fatalf("got %v, want ErrOutOfBounds", err) |
| 1654 | } |
| 1655 | } |
| 1656 | |
| 1657 | func TestCgroupsResponseItemOverlapRejected(t *testing.T) { |
| 1658 | buf := make([]byte, 8192) |
| 1659 | b := NewCgroupsBuilder(buf, 1, 0, 1) |
| 1660 | if err := b.Add(1, 0, 1, []byte("hello"), []byte("/path")); err != nil { |
| 1661 | t.Fatal(err) |
| 1662 | } |
| 1663 | total := b.Finish() |
| 1664 | |
| 1665 | dirBase := cgroupsRespHdr |
| 1666 | itemOff := int(ne.Uint32(buf[dirBase : dirBase+4])) |
| 1667 | packedStart := cgroupsRespHdr + 1*cgroupsDirEntry |
| 1668 | itemStart := packedStart + itemOff |
| 1669 | |
| 1670 | // name region is [32..38) (name_off=32, name_len=5, +1 for NUL) |
| 1671 | // Set path_off=34 (inside name), path_len=1 |
| 1672 | ne.PutUint32(buf[itemStart+24:itemStart+28], 34) |
| 1673 | ne.PutUint32(buf[itemStart+28:itemStart+32], 1) |
| 1674 | // Ensure NUL at item[35] |
| 1675 | buf[itemStart+35] = 0 |
| 1676 | |
| 1677 | view, err := DecodeCgroupsResponse(buf[:total]) |
| 1678 | if err != nil { |
| 1679 | t.Fatal(err) |
| 1680 | } |
| 1681 | _, err = view.Item(0) |
| 1682 | if err != ErrBadLayout { |
| 1683 | t.Fatalf("got %v, want ErrBadLayout (overlapping fields)", err) |
| 1684 | } |
| 1685 | } |