Dan Willemsen | c741332 | 2018-08-27 23:21:26 -0700 | [diff] [blame^] | 1 | // Copyright 2009 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package dnsmessage |
| 6 | |
| 7 | import ( |
| 8 | "bytes" |
| 9 | "fmt" |
| 10 | "reflect" |
| 11 | "strings" |
| 12 | "testing" |
| 13 | ) |
| 14 | |
| 15 | func mustNewName(name string) Name { |
| 16 | n, err := NewName(name) |
| 17 | if err != nil { |
| 18 | panic(err) |
| 19 | } |
| 20 | return n |
| 21 | } |
| 22 | |
| 23 | func (m *Message) String() string { |
| 24 | s := fmt.Sprintf("Message: %#v\n", &m.Header) |
| 25 | if len(m.Questions) > 0 { |
| 26 | s += "-- Questions\n" |
| 27 | for _, q := range m.Questions { |
| 28 | s += fmt.Sprintf("%#v\n", q) |
| 29 | } |
| 30 | } |
| 31 | if len(m.Answers) > 0 { |
| 32 | s += "-- Answers\n" |
| 33 | for _, a := range m.Answers { |
| 34 | s += fmt.Sprintf("%#v\n", a) |
| 35 | } |
| 36 | } |
| 37 | if len(m.Authorities) > 0 { |
| 38 | s += "-- Authorities\n" |
| 39 | for _, ns := range m.Authorities { |
| 40 | s += fmt.Sprintf("%#v\n", ns) |
| 41 | } |
| 42 | } |
| 43 | if len(m.Additionals) > 0 { |
| 44 | s += "-- Additionals\n" |
| 45 | for _, e := range m.Additionals { |
| 46 | s += fmt.Sprintf("%#v\n", e) |
| 47 | } |
| 48 | } |
| 49 | return s |
| 50 | } |
| 51 | |
| 52 | func TestNameString(t *testing.T) { |
| 53 | want := "foo" |
| 54 | name := mustNewName(want) |
| 55 | if got := fmt.Sprint(name); got != want { |
| 56 | t.Errorf("got fmt.Sprint(%#v) = %s, want = %s", name, got, want) |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | func TestQuestionPackUnpack(t *testing.T) { |
| 61 | want := Question{ |
| 62 | Name: mustNewName("."), |
| 63 | Type: TypeA, |
| 64 | Class: ClassINET, |
| 65 | } |
| 66 | buf, err := want.pack(make([]byte, 1, 50), map[string]int{}, 1) |
| 67 | if err != nil { |
| 68 | t.Fatal("Packing failed:", err) |
| 69 | } |
| 70 | var p Parser |
| 71 | p.msg = buf |
| 72 | p.header.questions = 1 |
| 73 | p.section = sectionQuestions |
| 74 | p.off = 1 |
| 75 | got, err := p.Question() |
| 76 | if err != nil { |
| 77 | t.Fatalf("Unpacking failed: %v\n%s", err, string(buf[1:])) |
| 78 | } |
| 79 | if p.off != len(buf) { |
| 80 | t.Errorf("Unpacked different amount than packed: got n = %d, want = %d", p.off, len(buf)) |
| 81 | } |
| 82 | if !reflect.DeepEqual(got, want) { |
| 83 | t.Errorf("Got = %+v, want = %+v", got, want) |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | func TestName(t *testing.T) { |
| 88 | tests := []string{ |
| 89 | "", |
| 90 | ".", |
| 91 | "google..com", |
| 92 | "google.com", |
| 93 | "google..com.", |
| 94 | "google.com.", |
| 95 | ".google.com.", |
| 96 | "www..google.com.", |
| 97 | "www.google.com.", |
| 98 | } |
| 99 | |
| 100 | for _, test := range tests { |
| 101 | n, err := NewName(test) |
| 102 | if err != nil { |
| 103 | t.Errorf("Creating name for %q: %v", test, err) |
| 104 | continue |
| 105 | } |
| 106 | if ns := n.String(); ns != test { |
| 107 | t.Errorf("Got %#v.String() = %q, want = %q", n, ns, test) |
| 108 | continue |
| 109 | } |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | func TestNamePackUnpack(t *testing.T) { |
| 114 | tests := []struct { |
| 115 | in string |
| 116 | want string |
| 117 | err error |
| 118 | }{ |
| 119 | {"", "", errNonCanonicalName}, |
| 120 | {".", ".", nil}, |
| 121 | {"google..com", "", errNonCanonicalName}, |
| 122 | {"google.com", "", errNonCanonicalName}, |
| 123 | {"google..com.", "", errZeroSegLen}, |
| 124 | {"google.com.", "google.com.", nil}, |
| 125 | {".google.com.", "", errZeroSegLen}, |
| 126 | {"www..google.com.", "", errZeroSegLen}, |
| 127 | {"www.google.com.", "www.google.com.", nil}, |
| 128 | } |
| 129 | |
| 130 | for _, test := range tests { |
| 131 | in := mustNewName(test.in) |
| 132 | want := mustNewName(test.want) |
| 133 | buf, err := in.pack(make([]byte, 0, 30), map[string]int{}, 0) |
| 134 | if err != test.err { |
| 135 | t.Errorf("Packing of %q: got err = %v, want err = %v", test.in, err, test.err) |
| 136 | continue |
| 137 | } |
| 138 | if test.err != nil { |
| 139 | continue |
| 140 | } |
| 141 | var got Name |
| 142 | n, err := got.unpack(buf, 0) |
| 143 | if err != nil { |
| 144 | t.Errorf("Unpacking for %q failed: %v", test.in, err) |
| 145 | continue |
| 146 | } |
| 147 | if n != len(buf) { |
| 148 | t.Errorf( |
| 149 | "Unpacked different amount than packed for %q: got n = %d, want = %d", |
| 150 | test.in, |
| 151 | n, |
| 152 | len(buf), |
| 153 | ) |
| 154 | } |
| 155 | if got != want { |
| 156 | t.Errorf("Unpacking packing of %q: got = %#v, want = %#v", test.in, got, want) |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | func TestIncompressibleName(t *testing.T) { |
| 162 | name := mustNewName("example.com.") |
| 163 | compression := map[string]int{} |
| 164 | buf, err := name.pack(make([]byte, 0, 100), compression, 0) |
| 165 | if err != nil { |
| 166 | t.Fatal("First packing failed:", err) |
| 167 | } |
| 168 | buf, err = name.pack(buf, compression, 0) |
| 169 | if err != nil { |
| 170 | t.Fatal("Second packing failed:", err) |
| 171 | } |
| 172 | var n1 Name |
| 173 | off, err := n1.unpackCompressed(buf, 0, false /* allowCompression */) |
| 174 | if err != nil { |
| 175 | t.Fatal("Unpacking incompressible name without pointers failed:", err) |
| 176 | } |
| 177 | var n2 Name |
| 178 | if _, err := n2.unpackCompressed(buf, off, false /* allowCompression */); err != errCompressedSRV { |
| 179 | t.Errorf("Unpacking compressed incompressible name with pointers: got err = %v, want = %v", err, errCompressedSRV) |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | func checkErrorPrefix(err error, prefix string) bool { |
| 184 | e, ok := err.(*nestedError) |
| 185 | return ok && e.s == prefix |
| 186 | } |
| 187 | |
| 188 | func TestHeaderUnpackError(t *testing.T) { |
| 189 | wants := []string{ |
| 190 | "id", |
| 191 | "bits", |
| 192 | "questions", |
| 193 | "answers", |
| 194 | "authorities", |
| 195 | "additionals", |
| 196 | } |
| 197 | var buf []byte |
| 198 | var h header |
| 199 | for _, want := range wants { |
| 200 | n, err := h.unpack(buf, 0) |
| 201 | if n != 0 || !checkErrorPrefix(err, want) { |
| 202 | t.Errorf("got h.unpack([%d]byte, 0) = %d, %v, want = 0, %s", len(buf), n, err, want) |
| 203 | } |
| 204 | buf = append(buf, 0, 0) |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | func TestParserStart(t *testing.T) { |
| 209 | const want = "unpacking header" |
| 210 | var p Parser |
| 211 | for i := 0; i <= 1; i++ { |
| 212 | _, err := p.Start([]byte{}) |
| 213 | if !checkErrorPrefix(err, want) { |
| 214 | t.Errorf("got p.Start(nil) = _, %v, want = _, %s", err, want) |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | func TestResourceNotStarted(t *testing.T) { |
| 220 | tests := []struct { |
| 221 | name string |
| 222 | fn func(*Parser) error |
| 223 | }{ |
| 224 | {"CNAMEResource", func(p *Parser) error { _, err := p.CNAMEResource(); return err }}, |
| 225 | {"MXResource", func(p *Parser) error { _, err := p.MXResource(); return err }}, |
| 226 | {"NSResource", func(p *Parser) error { _, err := p.NSResource(); return err }}, |
| 227 | {"PTRResource", func(p *Parser) error { _, err := p.PTRResource(); return err }}, |
| 228 | {"SOAResource", func(p *Parser) error { _, err := p.SOAResource(); return err }}, |
| 229 | {"TXTResource", func(p *Parser) error { _, err := p.TXTResource(); return err }}, |
| 230 | {"SRVResource", func(p *Parser) error { _, err := p.SRVResource(); return err }}, |
| 231 | {"AResource", func(p *Parser) error { _, err := p.AResource(); return err }}, |
| 232 | {"AAAAResource", func(p *Parser) error { _, err := p.AAAAResource(); return err }}, |
| 233 | } |
| 234 | |
| 235 | for _, test := range tests { |
| 236 | if err := test.fn(&Parser{}); err != ErrNotStarted { |
| 237 | t.Errorf("got _, %v = p.%s(), want = _, %v", err, test.name, ErrNotStarted) |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | func TestDNSPackUnpack(t *testing.T) { |
| 243 | wants := []Message{ |
| 244 | { |
| 245 | Questions: []Question{ |
| 246 | { |
| 247 | Name: mustNewName("."), |
| 248 | Type: TypeAAAA, |
| 249 | Class: ClassINET, |
| 250 | }, |
| 251 | }, |
| 252 | Answers: []Resource{}, |
| 253 | Authorities: []Resource{}, |
| 254 | Additionals: []Resource{}, |
| 255 | }, |
| 256 | largeTestMsg(), |
| 257 | } |
| 258 | for i, want := range wants { |
| 259 | b, err := want.Pack() |
| 260 | if err != nil { |
| 261 | t.Fatalf("%d: packing failed: %v", i, err) |
| 262 | } |
| 263 | var got Message |
| 264 | err = got.Unpack(b) |
| 265 | if err != nil { |
| 266 | t.Fatalf("%d: unpacking failed: %v", i, err) |
| 267 | } |
| 268 | if !reflect.DeepEqual(got, want) { |
| 269 | t.Errorf("%d: got = %+v, want = %+v", i, &got, &want) |
| 270 | } |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | func TestDNSAppendPackUnpack(t *testing.T) { |
| 275 | wants := []Message{ |
| 276 | { |
| 277 | Questions: []Question{ |
| 278 | { |
| 279 | Name: mustNewName("."), |
| 280 | Type: TypeAAAA, |
| 281 | Class: ClassINET, |
| 282 | }, |
| 283 | }, |
| 284 | Answers: []Resource{}, |
| 285 | Authorities: []Resource{}, |
| 286 | Additionals: []Resource{}, |
| 287 | }, |
| 288 | largeTestMsg(), |
| 289 | } |
| 290 | for i, want := range wants { |
| 291 | b := make([]byte, 2, 514) |
| 292 | b, err := want.AppendPack(b) |
| 293 | if err != nil { |
| 294 | t.Fatalf("%d: packing failed: %v", i, err) |
| 295 | } |
| 296 | b = b[2:] |
| 297 | var got Message |
| 298 | err = got.Unpack(b) |
| 299 | if err != nil { |
| 300 | t.Fatalf("%d: unpacking failed: %v", i, err) |
| 301 | } |
| 302 | if !reflect.DeepEqual(got, want) { |
| 303 | t.Errorf("%d: got = %+v, want = %+v", i, &got, &want) |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | func TestSkipAll(t *testing.T) { |
| 309 | msg := largeTestMsg() |
| 310 | buf, err := msg.Pack() |
| 311 | if err != nil { |
| 312 | t.Fatal("Packing large test message:", err) |
| 313 | } |
| 314 | var p Parser |
| 315 | if _, err := p.Start(buf); err != nil { |
| 316 | t.Fatal(err) |
| 317 | } |
| 318 | |
| 319 | tests := []struct { |
| 320 | name string |
| 321 | f func() error |
| 322 | }{ |
| 323 | {"SkipAllQuestions", p.SkipAllQuestions}, |
| 324 | {"SkipAllAnswers", p.SkipAllAnswers}, |
| 325 | {"SkipAllAuthorities", p.SkipAllAuthorities}, |
| 326 | {"SkipAllAdditionals", p.SkipAllAdditionals}, |
| 327 | } |
| 328 | for _, test := range tests { |
| 329 | for i := 1; i <= 3; i++ { |
| 330 | if err := test.f(); err != nil { |
| 331 | t.Errorf("Call #%d to %s(): %v", i, test.name, err) |
| 332 | } |
| 333 | } |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | func TestSkipEach(t *testing.T) { |
| 338 | msg := smallTestMsg() |
| 339 | |
| 340 | buf, err := msg.Pack() |
| 341 | if err != nil { |
| 342 | t.Fatal("Packing test message:", err) |
| 343 | } |
| 344 | var p Parser |
| 345 | if _, err := p.Start(buf); err != nil { |
| 346 | t.Fatal(err) |
| 347 | } |
| 348 | |
| 349 | tests := []struct { |
| 350 | name string |
| 351 | f func() error |
| 352 | }{ |
| 353 | {"SkipQuestion", p.SkipQuestion}, |
| 354 | {"SkipAnswer", p.SkipAnswer}, |
| 355 | {"SkipAuthority", p.SkipAuthority}, |
| 356 | {"SkipAdditional", p.SkipAdditional}, |
| 357 | } |
| 358 | for _, test := range tests { |
| 359 | if err := test.f(); err != nil { |
| 360 | t.Errorf("First call: got %s() = %v, want = %v", test.name, err, nil) |
| 361 | } |
| 362 | if err := test.f(); err != ErrSectionDone { |
| 363 | t.Errorf("Second call: got %s() = %v, want = %v", test.name, err, ErrSectionDone) |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | func TestSkipAfterRead(t *testing.T) { |
| 369 | msg := smallTestMsg() |
| 370 | |
| 371 | buf, err := msg.Pack() |
| 372 | if err != nil { |
| 373 | t.Fatal("Packing test message:", err) |
| 374 | } |
| 375 | var p Parser |
| 376 | if _, err := p.Start(buf); err != nil { |
| 377 | t.Fatal(err) |
| 378 | } |
| 379 | |
| 380 | tests := []struct { |
| 381 | name string |
| 382 | skip func() error |
| 383 | read func() error |
| 384 | }{ |
| 385 | {"Question", p.SkipQuestion, func() error { _, err := p.Question(); return err }}, |
| 386 | {"Answer", p.SkipAnswer, func() error { _, err := p.Answer(); return err }}, |
| 387 | {"Authority", p.SkipAuthority, func() error { _, err := p.Authority(); return err }}, |
| 388 | {"Additional", p.SkipAdditional, func() error { _, err := p.Additional(); return err }}, |
| 389 | } |
| 390 | for _, test := range tests { |
| 391 | if err := test.read(); err != nil { |
| 392 | t.Errorf("Got %s() = _, %v, want = _, %v", test.name, err, nil) |
| 393 | } |
| 394 | if err := test.skip(); err != ErrSectionDone { |
| 395 | t.Errorf("Got Skip%s() = %v, want = %v", test.name, err, ErrSectionDone) |
| 396 | } |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | func TestSkipNotStarted(t *testing.T) { |
| 401 | var p Parser |
| 402 | |
| 403 | tests := []struct { |
| 404 | name string |
| 405 | f func() error |
| 406 | }{ |
| 407 | {"SkipAllQuestions", p.SkipAllQuestions}, |
| 408 | {"SkipAllAnswers", p.SkipAllAnswers}, |
| 409 | {"SkipAllAuthorities", p.SkipAllAuthorities}, |
| 410 | {"SkipAllAdditionals", p.SkipAllAdditionals}, |
| 411 | } |
| 412 | for _, test := range tests { |
| 413 | if err := test.f(); err != ErrNotStarted { |
| 414 | t.Errorf("Got %s() = %v, want = %v", test.name, err, ErrNotStarted) |
| 415 | } |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | func TestTooManyRecords(t *testing.T) { |
| 420 | const recs = int(^uint16(0)) + 1 |
| 421 | tests := []struct { |
| 422 | name string |
| 423 | msg Message |
| 424 | want error |
| 425 | }{ |
| 426 | { |
| 427 | "Questions", |
| 428 | Message{ |
| 429 | Questions: make([]Question, recs), |
| 430 | }, |
| 431 | errTooManyQuestions, |
| 432 | }, |
| 433 | { |
| 434 | "Answers", |
| 435 | Message{ |
| 436 | Answers: make([]Resource, recs), |
| 437 | }, |
| 438 | errTooManyAnswers, |
| 439 | }, |
| 440 | { |
| 441 | "Authorities", |
| 442 | Message{ |
| 443 | Authorities: make([]Resource, recs), |
| 444 | }, |
| 445 | errTooManyAuthorities, |
| 446 | }, |
| 447 | { |
| 448 | "Additionals", |
| 449 | Message{ |
| 450 | Additionals: make([]Resource, recs), |
| 451 | }, |
| 452 | errTooManyAdditionals, |
| 453 | }, |
| 454 | } |
| 455 | |
| 456 | for _, test := range tests { |
| 457 | if _, got := test.msg.Pack(); got != test.want { |
| 458 | t.Errorf("Packing %d %s: got = %v, want = %v", recs, test.name, got, test.want) |
| 459 | } |
| 460 | } |
| 461 | } |
| 462 | |
| 463 | func TestVeryLongTxt(t *testing.T) { |
| 464 | want := Resource{ |
| 465 | ResourceHeader{ |
| 466 | Name: mustNewName("foo.bar.example.com."), |
| 467 | Type: TypeTXT, |
| 468 | Class: ClassINET, |
| 469 | }, |
| 470 | &TXTResource{[]string{ |
| 471 | "", |
| 472 | "", |
| 473 | "foo bar", |
| 474 | "", |
| 475 | "www.example.com", |
| 476 | "www.example.com.", |
| 477 | strings.Repeat(".", 255), |
| 478 | }}, |
| 479 | } |
| 480 | buf, err := want.pack(make([]byte, 0, 8000), map[string]int{}, 0) |
| 481 | if err != nil { |
| 482 | t.Fatal("Packing failed:", err) |
| 483 | } |
| 484 | var got Resource |
| 485 | off, err := got.Header.unpack(buf, 0) |
| 486 | if err != nil { |
| 487 | t.Fatal("Unpacking ResourceHeader failed:", err) |
| 488 | } |
| 489 | body, n, err := unpackResourceBody(buf, off, got.Header) |
| 490 | if err != nil { |
| 491 | t.Fatal("Unpacking failed:", err) |
| 492 | } |
| 493 | got.Body = body |
| 494 | if n != len(buf) { |
| 495 | t.Errorf("Unpacked different amount than packed: got n = %d, want = %d", n, len(buf)) |
| 496 | } |
| 497 | if !reflect.DeepEqual(got, want) { |
| 498 | t.Errorf("Got = %#v, want = %#v", got, want) |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | func TestTooLongTxt(t *testing.T) { |
| 503 | rb := TXTResource{[]string{strings.Repeat(".", 256)}} |
| 504 | if _, err := rb.pack(make([]byte, 0, 8000), map[string]int{}, 0); err != errStringTooLong { |
| 505 | t.Errorf("Packing TXTRecord with 256 character string: got err = %v, want = %v", err, errStringTooLong) |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | func TestStartAppends(t *testing.T) { |
| 510 | buf := make([]byte, 2, 514) |
| 511 | wantBuf := []byte{4, 44} |
| 512 | copy(buf, wantBuf) |
| 513 | |
| 514 | b := NewBuilder(buf, Header{}) |
| 515 | b.EnableCompression() |
| 516 | |
| 517 | buf, err := b.Finish() |
| 518 | if err != nil { |
| 519 | t.Fatal("Building failed:", err) |
| 520 | } |
| 521 | if got, want := len(buf), headerLen+2; got != want { |
| 522 | t.Errorf("Got len(buf} = %d, want = %d", got, want) |
| 523 | } |
| 524 | if string(buf[:2]) != string(wantBuf) { |
| 525 | t.Errorf("Original data not preserved, got = %v, want = %v", buf[:2], wantBuf) |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | func TestStartError(t *testing.T) { |
| 530 | tests := []struct { |
| 531 | name string |
| 532 | fn func(*Builder) error |
| 533 | }{ |
| 534 | {"Questions", func(b *Builder) error { return b.StartQuestions() }}, |
| 535 | {"Answers", func(b *Builder) error { return b.StartAnswers() }}, |
| 536 | {"Authorities", func(b *Builder) error { return b.StartAuthorities() }}, |
| 537 | {"Additionals", func(b *Builder) error { return b.StartAdditionals() }}, |
| 538 | } |
| 539 | |
| 540 | envs := []struct { |
| 541 | name string |
| 542 | fn func() *Builder |
| 543 | want error |
| 544 | }{ |
| 545 | {"sectionNotStarted", func() *Builder { return &Builder{section: sectionNotStarted} }, ErrNotStarted}, |
| 546 | {"sectionDone", func() *Builder { return &Builder{section: sectionDone} }, ErrSectionDone}, |
| 547 | } |
| 548 | |
| 549 | for _, env := range envs { |
| 550 | for _, test := range tests { |
| 551 | if got := test.fn(env.fn()); got != env.want { |
| 552 | t.Errorf("got Builder{%s}.Start%s = %v, want = %v", env.name, test.name, got, env.want) |
| 553 | } |
| 554 | } |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | func TestBuilderResourceError(t *testing.T) { |
| 559 | tests := []struct { |
| 560 | name string |
| 561 | fn func(*Builder) error |
| 562 | }{ |
| 563 | {"CNAMEResource", func(b *Builder) error { return b.CNAMEResource(ResourceHeader{}, CNAMEResource{}) }}, |
| 564 | {"MXResource", func(b *Builder) error { return b.MXResource(ResourceHeader{}, MXResource{}) }}, |
| 565 | {"NSResource", func(b *Builder) error { return b.NSResource(ResourceHeader{}, NSResource{}) }}, |
| 566 | {"PTRResource", func(b *Builder) error { return b.PTRResource(ResourceHeader{}, PTRResource{}) }}, |
| 567 | {"SOAResource", func(b *Builder) error { return b.SOAResource(ResourceHeader{}, SOAResource{}) }}, |
| 568 | {"TXTResource", func(b *Builder) error { return b.TXTResource(ResourceHeader{}, TXTResource{}) }}, |
| 569 | {"SRVResource", func(b *Builder) error { return b.SRVResource(ResourceHeader{}, SRVResource{}) }}, |
| 570 | {"AResource", func(b *Builder) error { return b.AResource(ResourceHeader{}, AResource{}) }}, |
| 571 | {"AAAAResource", func(b *Builder) error { return b.AAAAResource(ResourceHeader{}, AAAAResource{}) }}, |
| 572 | } |
| 573 | |
| 574 | envs := []struct { |
| 575 | name string |
| 576 | fn func() *Builder |
| 577 | want error |
| 578 | }{ |
| 579 | {"sectionNotStarted", func() *Builder { return &Builder{section: sectionNotStarted} }, ErrNotStarted}, |
| 580 | {"sectionHeader", func() *Builder { return &Builder{section: sectionHeader} }, ErrNotStarted}, |
| 581 | {"sectionQuestions", func() *Builder { return &Builder{section: sectionQuestions} }, ErrNotStarted}, |
| 582 | {"sectionDone", func() *Builder { return &Builder{section: sectionDone} }, ErrSectionDone}, |
| 583 | } |
| 584 | |
| 585 | for _, env := range envs { |
| 586 | for _, test := range tests { |
| 587 | if got := test.fn(env.fn()); got != env.want { |
| 588 | t.Errorf("got Builder{%s}.%s = %v, want = %v", env.name, test.name, got, env.want) |
| 589 | } |
| 590 | } |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | func TestFinishError(t *testing.T) { |
| 595 | var b Builder |
| 596 | want := ErrNotStarted |
| 597 | if _, got := b.Finish(); got != want { |
| 598 | t.Errorf("got Builder{}.Finish() = %v, want = %v", got, want) |
| 599 | } |
| 600 | } |
| 601 | |
| 602 | func TestBuilder(t *testing.T) { |
| 603 | msg := largeTestMsg() |
| 604 | want, err := msg.Pack() |
| 605 | if err != nil { |
| 606 | t.Fatal("Packing without builder:", err) |
| 607 | } |
| 608 | |
| 609 | b := NewBuilder(nil, msg.Header) |
| 610 | b.EnableCompression() |
| 611 | |
| 612 | if err := b.StartQuestions(); err != nil { |
| 613 | t.Fatal("b.StartQuestions():", err) |
| 614 | } |
| 615 | for _, q := range msg.Questions { |
| 616 | if err := b.Question(q); err != nil { |
| 617 | t.Fatalf("b.Question(%#v): %v", q, err) |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | if err := b.StartAnswers(); err != nil { |
| 622 | t.Fatal("b.StartAnswers():", err) |
| 623 | } |
| 624 | for _, a := range msg.Answers { |
| 625 | switch a.Header.Type { |
| 626 | case TypeA: |
| 627 | if err := b.AResource(a.Header, *a.Body.(*AResource)); err != nil { |
| 628 | t.Fatalf("b.AResource(%#v): %v", a, err) |
| 629 | } |
| 630 | case TypeNS: |
| 631 | if err := b.NSResource(a.Header, *a.Body.(*NSResource)); err != nil { |
| 632 | t.Fatalf("b.NSResource(%#v): %v", a, err) |
| 633 | } |
| 634 | case TypeCNAME: |
| 635 | if err := b.CNAMEResource(a.Header, *a.Body.(*CNAMEResource)); err != nil { |
| 636 | t.Fatalf("b.CNAMEResource(%#v): %v", a, err) |
| 637 | } |
| 638 | case TypeSOA: |
| 639 | if err := b.SOAResource(a.Header, *a.Body.(*SOAResource)); err != nil { |
| 640 | t.Fatalf("b.SOAResource(%#v): %v", a, err) |
| 641 | } |
| 642 | case TypePTR: |
| 643 | if err := b.PTRResource(a.Header, *a.Body.(*PTRResource)); err != nil { |
| 644 | t.Fatalf("b.PTRResource(%#v): %v", a, err) |
| 645 | } |
| 646 | case TypeMX: |
| 647 | if err := b.MXResource(a.Header, *a.Body.(*MXResource)); err != nil { |
| 648 | t.Fatalf("b.MXResource(%#v): %v", a, err) |
| 649 | } |
| 650 | case TypeTXT: |
| 651 | if err := b.TXTResource(a.Header, *a.Body.(*TXTResource)); err != nil { |
| 652 | t.Fatalf("b.TXTResource(%#v): %v", a, err) |
| 653 | } |
| 654 | case TypeAAAA: |
| 655 | if err := b.AAAAResource(a.Header, *a.Body.(*AAAAResource)); err != nil { |
| 656 | t.Fatalf("b.AAAAResource(%#v): %v", a, err) |
| 657 | } |
| 658 | case TypeSRV: |
| 659 | if err := b.SRVResource(a.Header, *a.Body.(*SRVResource)); err != nil { |
| 660 | t.Fatalf("b.SRVResource(%#v): %v", a, err) |
| 661 | } |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | if err := b.StartAuthorities(); err != nil { |
| 666 | t.Fatal("b.StartAuthorities():", err) |
| 667 | } |
| 668 | for _, a := range msg.Authorities { |
| 669 | if err := b.NSResource(a.Header, *a.Body.(*NSResource)); err != nil { |
| 670 | t.Fatalf("b.NSResource(%#v): %v", a, err) |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | if err := b.StartAdditionals(); err != nil { |
| 675 | t.Fatal("b.StartAdditionals():", err) |
| 676 | } |
| 677 | for _, a := range msg.Additionals { |
| 678 | if err := b.TXTResource(a.Header, *a.Body.(*TXTResource)); err != nil { |
| 679 | t.Fatalf("b.TXTResource(%#v): %v", a, err) |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | got, err := b.Finish() |
| 684 | if err != nil { |
| 685 | t.Fatal("b.Finish():", err) |
| 686 | } |
| 687 | if !bytes.Equal(got, want) { |
| 688 | t.Fatalf("Got from Builder: %#v\nwant = %#v", got, want) |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | func TestResourcePack(t *testing.T) { |
| 693 | for _, tt := range []struct { |
| 694 | m Message |
| 695 | err error |
| 696 | }{ |
| 697 | { |
| 698 | Message{ |
| 699 | Questions: []Question{ |
| 700 | { |
| 701 | Name: mustNewName("."), |
| 702 | Type: TypeAAAA, |
| 703 | Class: ClassINET, |
| 704 | }, |
| 705 | }, |
| 706 | Answers: []Resource{{ResourceHeader{}, nil}}, |
| 707 | }, |
| 708 | &nestedError{"packing Answer", errNilResouceBody}, |
| 709 | }, |
| 710 | { |
| 711 | Message{ |
| 712 | Questions: []Question{ |
| 713 | { |
| 714 | Name: mustNewName("."), |
| 715 | Type: TypeAAAA, |
| 716 | Class: ClassINET, |
| 717 | }, |
| 718 | }, |
| 719 | Authorities: []Resource{{ResourceHeader{}, (*NSResource)(nil)}}, |
| 720 | }, |
| 721 | &nestedError{"packing Authority", |
| 722 | &nestedError{"ResourceHeader", |
| 723 | &nestedError{"Name", errNonCanonicalName}, |
| 724 | }, |
| 725 | }, |
| 726 | }, |
| 727 | { |
| 728 | Message{ |
| 729 | Questions: []Question{ |
| 730 | { |
| 731 | Name: mustNewName("."), |
| 732 | Type: TypeA, |
| 733 | Class: ClassINET, |
| 734 | }, |
| 735 | }, |
| 736 | Additionals: []Resource{{ResourceHeader{}, nil}}, |
| 737 | }, |
| 738 | &nestedError{"packing Additional", errNilResouceBody}, |
| 739 | }, |
| 740 | } { |
| 741 | _, err := tt.m.Pack() |
| 742 | if !reflect.DeepEqual(err, tt.err) { |
| 743 | t.Errorf("got %v for %v; want %v", err, tt.m, tt.err) |
| 744 | } |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | func benchmarkParsingSetup() ([]byte, error) { |
| 749 | name := mustNewName("foo.bar.example.com.") |
| 750 | msg := Message{ |
| 751 | Header: Header{Response: true, Authoritative: true}, |
| 752 | Questions: []Question{ |
| 753 | { |
| 754 | Name: name, |
| 755 | Type: TypeA, |
| 756 | Class: ClassINET, |
| 757 | }, |
| 758 | }, |
| 759 | Answers: []Resource{ |
| 760 | { |
| 761 | ResourceHeader{ |
| 762 | Name: name, |
| 763 | Class: ClassINET, |
| 764 | }, |
| 765 | &AResource{[4]byte{}}, |
| 766 | }, |
| 767 | { |
| 768 | ResourceHeader{ |
| 769 | Name: name, |
| 770 | Class: ClassINET, |
| 771 | }, |
| 772 | &AAAAResource{[16]byte{}}, |
| 773 | }, |
| 774 | { |
| 775 | ResourceHeader{ |
| 776 | Name: name, |
| 777 | Class: ClassINET, |
| 778 | }, |
| 779 | &CNAMEResource{name}, |
| 780 | }, |
| 781 | { |
| 782 | ResourceHeader{ |
| 783 | Name: name, |
| 784 | Class: ClassINET, |
| 785 | }, |
| 786 | &NSResource{name}, |
| 787 | }, |
| 788 | }, |
| 789 | } |
| 790 | |
| 791 | buf, err := msg.Pack() |
| 792 | if err != nil { |
| 793 | return nil, fmt.Errorf("msg.Pack(): %v", err) |
| 794 | } |
| 795 | return buf, nil |
| 796 | } |
| 797 | |
| 798 | func benchmarkParsing(tb testing.TB, buf []byte) { |
| 799 | var p Parser |
| 800 | if _, err := p.Start(buf); err != nil { |
| 801 | tb.Fatal("p.Start(buf):", err) |
| 802 | } |
| 803 | |
| 804 | for { |
| 805 | _, err := p.Question() |
| 806 | if err == ErrSectionDone { |
| 807 | break |
| 808 | } |
| 809 | if err != nil { |
| 810 | tb.Fatal("p.Question():", err) |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | for { |
| 815 | h, err := p.AnswerHeader() |
| 816 | if err == ErrSectionDone { |
| 817 | break |
| 818 | } |
| 819 | if err != nil { |
| 820 | panic(err) |
| 821 | } |
| 822 | |
| 823 | switch h.Type { |
| 824 | case TypeA: |
| 825 | if _, err := p.AResource(); err != nil { |
| 826 | tb.Fatal("p.AResource():", err) |
| 827 | } |
| 828 | case TypeAAAA: |
| 829 | if _, err := p.AAAAResource(); err != nil { |
| 830 | tb.Fatal("p.AAAAResource():", err) |
| 831 | } |
| 832 | case TypeCNAME: |
| 833 | if _, err := p.CNAMEResource(); err != nil { |
| 834 | tb.Fatal("p.CNAMEResource():", err) |
| 835 | } |
| 836 | case TypeNS: |
| 837 | if _, err := p.NSResource(); err != nil { |
| 838 | tb.Fatal("p.NSResource():", err) |
| 839 | } |
| 840 | default: |
| 841 | tb.Fatalf("unknown type: %T", h) |
| 842 | } |
| 843 | } |
| 844 | } |
| 845 | |
| 846 | func BenchmarkParsing(b *testing.B) { |
| 847 | buf, err := benchmarkParsingSetup() |
| 848 | if err != nil { |
| 849 | b.Fatal(err) |
| 850 | } |
| 851 | |
| 852 | b.ReportAllocs() |
| 853 | for i := 0; i < b.N; i++ { |
| 854 | benchmarkParsing(b, buf) |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | func TestParsingAllocs(t *testing.T) { |
| 859 | buf, err := benchmarkParsingSetup() |
| 860 | if err != nil { |
| 861 | t.Fatal(err) |
| 862 | } |
| 863 | |
| 864 | if allocs := testing.AllocsPerRun(100, func() { benchmarkParsing(t, buf) }); allocs > 0.5 { |
| 865 | t.Errorf("Allocations during parsing: got = %f, want ~0", allocs) |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | func benchmarkBuildingSetup() (Name, []byte) { |
| 870 | name := mustNewName("foo.bar.example.com.") |
| 871 | buf := make([]byte, 0, packStartingCap) |
| 872 | return name, buf |
| 873 | } |
| 874 | |
| 875 | func benchmarkBuilding(tb testing.TB, name Name, buf []byte) { |
| 876 | bld := NewBuilder(buf, Header{Response: true, Authoritative: true}) |
| 877 | |
| 878 | if err := bld.StartQuestions(); err != nil { |
| 879 | tb.Fatal("bld.StartQuestions():", err) |
| 880 | } |
| 881 | q := Question{ |
| 882 | Name: name, |
| 883 | Type: TypeA, |
| 884 | Class: ClassINET, |
| 885 | } |
| 886 | if err := bld.Question(q); err != nil { |
| 887 | tb.Fatalf("bld.Question(%+v): %v", q, err) |
| 888 | } |
| 889 | |
| 890 | hdr := ResourceHeader{ |
| 891 | Name: name, |
| 892 | Class: ClassINET, |
| 893 | } |
| 894 | if err := bld.StartAnswers(); err != nil { |
| 895 | tb.Fatal("bld.StartQuestions():", err) |
| 896 | } |
| 897 | |
| 898 | ar := AResource{[4]byte{}} |
| 899 | if err := bld.AResource(hdr, ar); err != nil { |
| 900 | tb.Fatalf("bld.AResource(%+v, %+v): %v", hdr, ar, err) |
| 901 | } |
| 902 | |
| 903 | aaar := AAAAResource{[16]byte{}} |
| 904 | if err := bld.AAAAResource(hdr, aaar); err != nil { |
| 905 | tb.Fatalf("bld.AAAAResource(%+v, %+v): %v", hdr, aaar, err) |
| 906 | } |
| 907 | |
| 908 | cnr := CNAMEResource{name} |
| 909 | if err := bld.CNAMEResource(hdr, cnr); err != nil { |
| 910 | tb.Fatalf("bld.CNAMEResource(%+v, %+v): %v", hdr, cnr, err) |
| 911 | } |
| 912 | |
| 913 | nsr := NSResource{name} |
| 914 | if err := bld.NSResource(hdr, nsr); err != nil { |
| 915 | tb.Fatalf("bld.NSResource(%+v, %+v): %v", hdr, nsr, err) |
| 916 | } |
| 917 | |
| 918 | if _, err := bld.Finish(); err != nil { |
| 919 | tb.Fatal("bld.Finish():", err) |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | func BenchmarkBuilding(b *testing.B) { |
| 924 | name, buf := benchmarkBuildingSetup() |
| 925 | b.ReportAllocs() |
| 926 | for i := 0; i < b.N; i++ { |
| 927 | benchmarkBuilding(b, name, buf) |
| 928 | } |
| 929 | } |
| 930 | |
| 931 | func TestBuildingAllocs(t *testing.T) { |
| 932 | name, buf := benchmarkBuildingSetup() |
| 933 | if allocs := testing.AllocsPerRun(100, func() { benchmarkBuilding(t, name, buf) }); allocs > 0.5 { |
| 934 | t.Errorf("Allocations during building: got = %f, want ~0", allocs) |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | func smallTestMsg() Message { |
| 939 | name := mustNewName("example.com.") |
| 940 | return Message{ |
| 941 | Header: Header{Response: true, Authoritative: true}, |
| 942 | Questions: []Question{ |
| 943 | { |
| 944 | Name: name, |
| 945 | Type: TypeA, |
| 946 | Class: ClassINET, |
| 947 | }, |
| 948 | }, |
| 949 | Answers: []Resource{ |
| 950 | { |
| 951 | ResourceHeader{ |
| 952 | Name: name, |
| 953 | Type: TypeA, |
| 954 | Class: ClassINET, |
| 955 | }, |
| 956 | &AResource{[4]byte{127, 0, 0, 1}}, |
| 957 | }, |
| 958 | }, |
| 959 | Authorities: []Resource{ |
| 960 | { |
| 961 | ResourceHeader{ |
| 962 | Name: name, |
| 963 | Type: TypeA, |
| 964 | Class: ClassINET, |
| 965 | }, |
| 966 | &AResource{[4]byte{127, 0, 0, 1}}, |
| 967 | }, |
| 968 | }, |
| 969 | Additionals: []Resource{ |
| 970 | { |
| 971 | ResourceHeader{ |
| 972 | Name: name, |
| 973 | Type: TypeA, |
| 974 | Class: ClassINET, |
| 975 | }, |
| 976 | &AResource{[4]byte{127, 0, 0, 1}}, |
| 977 | }, |
| 978 | }, |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | func BenchmarkPack(b *testing.B) { |
| 983 | msg := largeTestMsg() |
| 984 | |
| 985 | b.ReportAllocs() |
| 986 | |
| 987 | for i := 0; i < b.N; i++ { |
| 988 | if _, err := msg.Pack(); err != nil { |
| 989 | b.Fatal(err) |
| 990 | } |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | func BenchmarkAppendPack(b *testing.B) { |
| 995 | msg := largeTestMsg() |
| 996 | buf := make([]byte, 0, packStartingCap) |
| 997 | |
| 998 | b.ReportAllocs() |
| 999 | |
| 1000 | for i := 0; i < b.N; i++ { |
| 1001 | if _, err := msg.AppendPack(buf[:0]); err != nil { |
| 1002 | b.Fatal(err) |
| 1003 | } |
| 1004 | } |
| 1005 | } |
| 1006 | |
| 1007 | func largeTestMsg() Message { |
| 1008 | name := mustNewName("foo.bar.example.com.") |
| 1009 | return Message{ |
| 1010 | Header: Header{Response: true, Authoritative: true}, |
| 1011 | Questions: []Question{ |
| 1012 | { |
| 1013 | Name: name, |
| 1014 | Type: TypeA, |
| 1015 | Class: ClassINET, |
| 1016 | }, |
| 1017 | }, |
| 1018 | Answers: []Resource{ |
| 1019 | { |
| 1020 | ResourceHeader{ |
| 1021 | Name: name, |
| 1022 | Type: TypeA, |
| 1023 | Class: ClassINET, |
| 1024 | }, |
| 1025 | &AResource{[4]byte{127, 0, 0, 1}}, |
| 1026 | }, |
| 1027 | { |
| 1028 | ResourceHeader{ |
| 1029 | Name: name, |
| 1030 | Type: TypeA, |
| 1031 | Class: ClassINET, |
| 1032 | }, |
| 1033 | &AResource{[4]byte{127, 0, 0, 2}}, |
| 1034 | }, |
| 1035 | { |
| 1036 | ResourceHeader{ |
| 1037 | Name: name, |
| 1038 | Type: TypeAAAA, |
| 1039 | Class: ClassINET, |
| 1040 | }, |
| 1041 | &AAAAResource{[16]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}}, |
| 1042 | }, |
| 1043 | { |
| 1044 | ResourceHeader{ |
| 1045 | Name: name, |
| 1046 | Type: TypeCNAME, |
| 1047 | Class: ClassINET, |
| 1048 | }, |
| 1049 | &CNAMEResource{mustNewName("alias.example.com.")}, |
| 1050 | }, |
| 1051 | { |
| 1052 | ResourceHeader{ |
| 1053 | Name: name, |
| 1054 | Type: TypeSOA, |
| 1055 | Class: ClassINET, |
| 1056 | }, |
| 1057 | &SOAResource{ |
| 1058 | NS: mustNewName("ns1.example.com."), |
| 1059 | MBox: mustNewName("mb.example.com."), |
| 1060 | Serial: 1, |
| 1061 | Refresh: 2, |
| 1062 | Retry: 3, |
| 1063 | Expire: 4, |
| 1064 | MinTTL: 5, |
| 1065 | }, |
| 1066 | }, |
| 1067 | { |
| 1068 | ResourceHeader{ |
| 1069 | Name: name, |
| 1070 | Type: TypePTR, |
| 1071 | Class: ClassINET, |
| 1072 | }, |
| 1073 | &PTRResource{mustNewName("ptr.example.com.")}, |
| 1074 | }, |
| 1075 | { |
| 1076 | ResourceHeader{ |
| 1077 | Name: name, |
| 1078 | Type: TypeMX, |
| 1079 | Class: ClassINET, |
| 1080 | }, |
| 1081 | &MXResource{ |
| 1082 | 7, |
| 1083 | mustNewName("mx.example.com."), |
| 1084 | }, |
| 1085 | }, |
| 1086 | { |
| 1087 | ResourceHeader{ |
| 1088 | Name: name, |
| 1089 | Type: TypeSRV, |
| 1090 | Class: ClassINET, |
| 1091 | }, |
| 1092 | &SRVResource{ |
| 1093 | 8, |
| 1094 | 9, |
| 1095 | 11, |
| 1096 | mustNewName("srv.example.com."), |
| 1097 | }, |
| 1098 | }, |
| 1099 | }, |
| 1100 | Authorities: []Resource{ |
| 1101 | { |
| 1102 | ResourceHeader{ |
| 1103 | Name: name, |
| 1104 | Type: TypeNS, |
| 1105 | Class: ClassINET, |
| 1106 | }, |
| 1107 | &NSResource{mustNewName("ns1.example.com.")}, |
| 1108 | }, |
| 1109 | { |
| 1110 | ResourceHeader{ |
| 1111 | Name: name, |
| 1112 | Type: TypeNS, |
| 1113 | Class: ClassINET, |
| 1114 | }, |
| 1115 | &NSResource{mustNewName("ns2.example.com.")}, |
| 1116 | }, |
| 1117 | }, |
| 1118 | Additionals: []Resource{ |
| 1119 | { |
| 1120 | ResourceHeader{ |
| 1121 | Name: name, |
| 1122 | Type: TypeTXT, |
| 1123 | Class: ClassINET, |
| 1124 | }, |
| 1125 | &TXTResource{[]string{"So Long, and Thanks for All the Fish"}}, |
| 1126 | }, |
| 1127 | { |
| 1128 | ResourceHeader{ |
| 1129 | Name: name, |
| 1130 | Type: TypeTXT, |
| 1131 | Class: ClassINET, |
| 1132 | }, |
| 1133 | &TXTResource{[]string{"Hamster Huey and the Gooey Kablooie"}}, |
| 1134 | }, |
| 1135 | }, |
| 1136 | } |
| 1137 | } |