Mercurial > hg > nginx
annotate src/stream/ngx_stream_script.c @ 6644:af642539cd53
Fixed regex captures handling without PCRE.
If PCRE is disabled, captures were treated as normal variables in
ngx_http_script_compile(), while code calculating flushes array length in
ngx_http_compile_complex_value() did not account captures as variables.
This could lead to write outside of the array boundary when setting
last element to -1.
Found with AddressSanitizer.
| author | Vladimir Homutov <vl@nginx.com> |
|---|---|
| date | Wed, 06 Jul 2016 14:33:40 +0300 |
| parents | c70b7f4537e1 |
| children | 0125b151c9a5 |
| rev | line source |
|---|---|
| 6607 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 * Copyright (C) Nginx, Inc. | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_stream.h> | |
| 11 | |
| 12 | |
| 13 static ngx_int_t ngx_stream_script_init_arrays( | |
| 14 ngx_stream_script_compile_t *sc); | |
| 15 static ngx_int_t ngx_stream_script_done(ngx_stream_script_compile_t *sc); | |
| 16 static ngx_int_t ngx_stream_script_add_copy_code( | |
| 17 ngx_stream_script_compile_t *sc, ngx_str_t *value, ngx_uint_t last); | |
| 18 static ngx_int_t ngx_stream_script_add_var_code( | |
| 19 ngx_stream_script_compile_t *sc, ngx_str_t *name); | |
| 20 #if (NGX_PCRE) | |
| 21 static ngx_int_t ngx_stream_script_add_capture_code( | |
| 22 ngx_stream_script_compile_t *sc, ngx_uint_t n); | |
| 23 #endif | |
| 24 static ngx_int_t ngx_stream_script_add_full_name_code( | |
| 25 ngx_stream_script_compile_t *sc); | |
| 26 static size_t ngx_stream_script_full_name_len_code( | |
| 27 ngx_stream_script_engine_t *e); | |
| 28 static void ngx_stream_script_full_name_code(ngx_stream_script_engine_t *e); | |
| 29 | |
| 30 | |
| 31 #define ngx_stream_script_exit (u_char *) &ngx_stream_script_exit_code | |
| 32 | |
| 33 static uintptr_t ngx_stream_script_exit_code = (uintptr_t) NULL; | |
| 34 | |
| 35 | |
| 36 void | |
| 37 ngx_stream_script_flush_complex_value(ngx_stream_session_t *s, | |
| 38 ngx_stream_complex_value_t *val) | |
| 39 { | |
| 40 ngx_uint_t *index; | |
| 41 | |
| 42 index = val->flushes; | |
| 43 | |
| 44 if (index) { | |
| 45 while (*index != (ngx_uint_t) -1) { | |
| 46 | |
| 47 if (s->variables[*index].no_cacheable) { | |
| 48 s->variables[*index].valid = 0; | |
| 49 s->variables[*index].not_found = 0; | |
| 50 } | |
| 51 | |
| 52 index++; | |
| 53 } | |
| 54 } | |
| 55 } | |
| 56 | |
| 57 | |
| 58 ngx_int_t | |
| 59 ngx_stream_complex_value(ngx_stream_session_t *s, | |
| 60 ngx_stream_complex_value_t *val, ngx_str_t *value) | |
| 61 { | |
| 62 size_t len; | |
| 63 ngx_stream_script_code_pt code; | |
| 64 ngx_stream_script_engine_t e; | |
| 65 ngx_stream_script_len_code_pt lcode; | |
| 66 | |
| 67 if (val->lengths == NULL) { | |
| 68 *value = val->value; | |
| 69 return NGX_OK; | |
| 70 } | |
| 71 | |
| 72 ngx_stream_script_flush_complex_value(s, val); | |
| 73 | |
| 74 ngx_memzero(&e, sizeof(ngx_stream_script_engine_t)); | |
| 75 | |
| 76 e.ip = val->lengths; | |
| 77 e.session = s; | |
| 78 e.flushed = 1; | |
| 79 | |
| 80 len = 0; | |
| 81 | |
| 82 while (*(uintptr_t *) e.ip) { | |
| 83 lcode = *(ngx_stream_script_len_code_pt *) e.ip; | |
| 84 len += lcode(&e); | |
| 85 } | |
| 86 | |
| 87 value->len = len; | |
| 88 value->data = ngx_pnalloc(s->connection->pool, len); | |
| 89 if (value->data == NULL) { | |
| 90 return NGX_ERROR; | |
| 91 } | |
| 92 | |
| 93 e.ip = val->values; | |
| 94 e.pos = value->data; | |
| 95 e.buf = *value; | |
| 96 | |
| 97 while (*(uintptr_t *) e.ip) { | |
| 98 code = *(ngx_stream_script_code_pt *) e.ip; | |
| 99 code((ngx_stream_script_engine_t *) &e); | |
| 100 } | |
| 101 | |
| 102 *value = e.buf; | |
| 103 | |
| 104 return NGX_OK; | |
| 105 } | |
| 106 | |
| 107 | |
| 108 ngx_int_t | |
| 109 ngx_stream_compile_complex_value(ngx_stream_compile_complex_value_t *ccv) | |
| 110 { | |
| 111 ngx_str_t *v; | |
| 112 ngx_uint_t i, n, nv, nc; | |
| 113 ngx_array_t flushes, lengths, values, *pf, *pl, *pv; | |
| 114 ngx_stream_script_compile_t sc; | |
| 115 | |
| 116 v = ccv->value; | |
| 117 | |
| 118 nv = 0; | |
| 119 nc = 0; | |
| 120 | |
| 121 for (i = 0; i < v->len; i++) { | |
| 122 if (v->data[i] == '$') { | |
| 123 if (v->data[i + 1] >= '1' && v->data[i + 1] <= '9') { | |
| 124 nc++; | |
| 125 | |
| 126 } else { | |
| 127 nv++; | |
| 128 } | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 if ((v->len == 0 || v->data[0] != '$') | |
| 133 && (ccv->conf_prefix || ccv->root_prefix)) | |
| 134 { | |
| 135 if (ngx_conf_full_name(ccv->cf->cycle, v, ccv->conf_prefix) != NGX_OK) { | |
| 136 return NGX_ERROR; | |
| 137 } | |
| 138 | |
| 139 ccv->conf_prefix = 0; | |
| 140 ccv->root_prefix = 0; | |
| 141 } | |
| 142 | |
| 143 ccv->complex_value->value = *v; | |
| 144 ccv->complex_value->flushes = NULL; | |
| 145 ccv->complex_value->lengths = NULL; | |
| 146 ccv->complex_value->values = NULL; | |
| 147 | |
| 148 if (nv == 0 && nc == 0) { | |
| 149 return NGX_OK; | |
| 150 } | |
| 151 | |
| 152 n = nv + 1; | |
| 153 | |
| 154 if (ngx_array_init(&flushes, ccv->cf->pool, n, sizeof(ngx_uint_t)) | |
| 155 != NGX_OK) | |
| 156 { | |
| 157 return NGX_ERROR; | |
| 158 } | |
| 159 | |
| 160 n = nv * (2 * sizeof(ngx_stream_script_copy_code_t) | |
| 161 + sizeof(ngx_stream_script_var_code_t)) | |
| 162 + sizeof(uintptr_t); | |
| 163 | |
| 164 if (ngx_array_init(&lengths, ccv->cf->pool, n, 1) != NGX_OK) { | |
| 165 return NGX_ERROR; | |
| 166 } | |
| 167 | |
| 168 n = (nv * (2 * sizeof(ngx_stream_script_copy_code_t) | |
| 169 + sizeof(ngx_stream_script_var_code_t)) | |
| 170 + sizeof(uintptr_t) | |
| 171 + v->len | |
| 172 + sizeof(uintptr_t) - 1) | |
| 173 & ~(sizeof(uintptr_t) - 1); | |
| 174 | |
| 175 if (ngx_array_init(&values, ccv->cf->pool, n, 1) != NGX_OK) { | |
| 176 return NGX_ERROR; | |
| 177 } | |
| 178 | |
| 179 pf = &flushes; | |
| 180 pl = &lengths; | |
| 181 pv = &values; | |
| 182 | |
| 183 ngx_memzero(&sc, sizeof(ngx_stream_script_compile_t)); | |
| 184 | |
| 185 sc.cf = ccv->cf; | |
| 186 sc.source = v; | |
| 187 sc.flushes = &pf; | |
| 188 sc.lengths = &pl; | |
| 189 sc.values = &pv; | |
| 190 sc.complete_lengths = 1; | |
| 191 sc.complete_values = 1; | |
| 192 sc.zero = ccv->zero; | |
| 193 sc.conf_prefix = ccv->conf_prefix; | |
| 194 sc.root_prefix = ccv->root_prefix; | |
| 195 | |
| 196 if (ngx_stream_script_compile(&sc) != NGX_OK) { | |
| 197 return NGX_ERROR; | |
| 198 } | |
| 199 | |
| 200 if (flushes.nelts) { | |
| 201 ccv->complex_value->flushes = flushes.elts; | |
| 202 ccv->complex_value->flushes[flushes.nelts] = (ngx_uint_t) -1; | |
| 203 } | |
| 204 | |
| 205 ccv->complex_value->lengths = lengths.elts; | |
| 206 ccv->complex_value->values = values.elts; | |
| 207 | |
| 208 return NGX_OK; | |
| 209 } | |
| 210 | |
| 211 | |
| 212 char * | |
| 213 ngx_stream_set_complex_value_slot(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 214 void *conf) | |
| 215 { | |
| 216 char *p = conf; | |
| 217 | |
| 218 ngx_str_t *value; | |
| 219 ngx_stream_complex_value_t **cv; | |
| 220 ngx_stream_compile_complex_value_t ccv; | |
| 221 | |
| 222 cv = (ngx_stream_complex_value_t **) (p + cmd->offset); | |
| 223 | |
| 224 if (*cv != NULL) { | |
| 225 return "duplicate"; | |
| 226 } | |
| 227 | |
| 228 *cv = ngx_palloc(cf->pool, sizeof(ngx_stream_complex_value_t)); | |
| 229 if (*cv == NULL) { | |
| 230 return NGX_CONF_ERROR; | |
| 231 } | |
| 232 | |
| 233 value = cf->args->elts; | |
| 234 | |
| 235 ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t)); | |
| 236 | |
| 237 ccv.cf = cf; | |
| 238 ccv.value = &value[1]; | |
| 239 ccv.complex_value = *cv; | |
| 240 | |
| 241 if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) { | |
| 242 return NGX_CONF_ERROR; | |
| 243 } | |
| 244 | |
| 245 return NGX_CONF_OK; | |
| 246 } | |
| 247 | |
| 248 | |
| 249 ngx_uint_t | |
| 250 ngx_stream_script_variables_count(ngx_str_t *value) | |
| 251 { | |
| 252 ngx_uint_t i, n; | |
| 253 | |
| 254 for (n = 0, i = 0; i < value->len; i++) { | |
| 255 if (value->data[i] == '$') { | |
| 256 n++; | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 return n; | |
| 261 } | |
| 262 | |
| 263 | |
| 264 ngx_int_t | |
| 265 ngx_stream_script_compile(ngx_stream_script_compile_t *sc) | |
| 266 { | |
| 267 u_char ch; | |
| 268 ngx_str_t name; | |
| 269 ngx_uint_t i, bracket; | |
| 270 | |
| 271 if (ngx_stream_script_init_arrays(sc) != NGX_OK) { | |
| 272 return NGX_ERROR; | |
| 273 } | |
| 274 | |
| 275 for (i = 0; i < sc->source->len; /* void */ ) { | |
| 276 | |
| 277 name.len = 0; | |
| 278 | |
| 279 if (sc->source->data[i] == '$') { | |
| 280 | |
| 281 if (++i == sc->source->len) { | |
| 282 goto invalid_variable; | |
| 283 } | |
| 284 | |
|
6644
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
285 if (sc->source->data[i] >= '1' && sc->source->data[i] <= '9') { |
| 6607 | 286 #if (NGX_PCRE) |
|
6644
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
287 ngx_uint_t n; |
| 6607 | 288 |
| 289 n = sc->source->data[i] - '0'; | |
| 290 | |
| 291 if (ngx_stream_script_add_capture_code(sc, n) != NGX_OK) { | |
| 292 return NGX_ERROR; | |
| 293 } | |
| 294 | |
| 295 i++; | |
| 296 | |
| 297 continue; | |
|
6644
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
298 #else |
|
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
299 ngx_conf_log_error(NGX_LOG_EMERG, sc->cf, 0, |
|
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
300 "using variable \"$%c\" requires " |
|
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
301 "PCRE library", sc->source->data[i]); |
|
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
302 return NGX_ERROR; |
|
af642539cd53
Fixed regex captures handling without PCRE.
Vladimir Homutov <vl@nginx.com>
parents:
6607
diff
changeset
|
303 #endif |
| 6607 | 304 } |
| 305 | |
| 306 if (sc->source->data[i] == '{') { | |
| 307 bracket = 1; | |
| 308 | |
| 309 if (++i == sc->source->len) { | |
| 310 goto invalid_variable; | |
| 311 } | |
| 312 | |
| 313 name.data = &sc->source->data[i]; | |
| 314 | |
| 315 } else { | |
| 316 bracket = 0; | |
| 317 name.data = &sc->source->data[i]; | |
| 318 } | |
| 319 | |
| 320 for ( /* void */ ; i < sc->source->len; i++, name.len++) { | |
| 321 ch = sc->source->data[i]; | |
| 322 | |
| 323 if (ch == '}' && bracket) { | |
| 324 i++; | |
| 325 bracket = 0; | |
| 326 break; | |
| 327 } | |
| 328 | |
| 329 if ((ch >= 'A' && ch <= 'Z') | |
| 330 || (ch >= 'a' && ch <= 'z') | |
| 331 || (ch >= '0' && ch <= '9') | |
| 332 || ch == '_') | |
| 333 { | |
| 334 continue; | |
| 335 } | |
| 336 | |
| 337 break; | |
| 338 } | |
| 339 | |
| 340 if (bracket) { | |
| 341 ngx_conf_log_error(NGX_LOG_EMERG, sc->cf, 0, | |
| 342 "the closing bracket in \"%V\" " | |
| 343 "variable is missing", &name); | |
| 344 return NGX_ERROR; | |
| 345 } | |
| 346 | |
| 347 if (name.len == 0) { | |
| 348 goto invalid_variable; | |
| 349 } | |
| 350 | |
| 351 sc->variables++; | |
| 352 | |
| 353 if (ngx_stream_script_add_var_code(sc, &name) != NGX_OK) { | |
| 354 return NGX_ERROR; | |
| 355 } | |
| 356 | |
| 357 continue; | |
| 358 } | |
| 359 | |
| 360 name.data = &sc->source->data[i]; | |
| 361 | |
| 362 while (i < sc->source->len) { | |
| 363 | |
| 364 if (sc->source->data[i] == '$') { | |
| 365 break; | |
| 366 } | |
| 367 | |
| 368 i++; | |
| 369 name.len++; | |
| 370 } | |
| 371 | |
| 372 sc->size += name.len; | |
| 373 | |
| 374 if (ngx_stream_script_add_copy_code(sc, &name, (i == sc->source->len)) | |
| 375 != NGX_OK) | |
| 376 { | |
| 377 return NGX_ERROR; | |
| 378 } | |
| 379 } | |
| 380 | |
| 381 return ngx_stream_script_done(sc); | |
| 382 | |
| 383 invalid_variable: | |
| 384 | |
| 385 ngx_conf_log_error(NGX_LOG_EMERG, sc->cf, 0, "invalid variable name"); | |
| 386 | |
| 387 return NGX_ERROR; | |
| 388 } | |
| 389 | |
| 390 | |
| 391 static ngx_int_t | |
| 392 ngx_stream_script_init_arrays(ngx_stream_script_compile_t *sc) | |
| 393 { | |
| 394 ngx_uint_t n; | |
| 395 | |
| 396 if (sc->flushes && *sc->flushes == NULL) { | |
| 397 n = sc->variables ? sc->variables : 1; | |
| 398 *sc->flushes = ngx_array_create(sc->cf->pool, n, sizeof(ngx_uint_t)); | |
| 399 if (*sc->flushes == NULL) { | |
| 400 return NGX_ERROR; | |
| 401 } | |
| 402 } | |
| 403 | |
| 404 if (*sc->lengths == NULL) { | |
| 405 n = sc->variables * (2 * sizeof(ngx_stream_script_copy_code_t) | |
| 406 + sizeof(ngx_stream_script_var_code_t)) | |
| 407 + sizeof(uintptr_t); | |
| 408 | |
| 409 *sc->lengths = ngx_array_create(sc->cf->pool, n, 1); | |
| 410 if (*sc->lengths == NULL) { | |
| 411 return NGX_ERROR; | |
| 412 } | |
| 413 } | |
| 414 | |
| 415 if (*sc->values == NULL) { | |
| 416 n = (sc->variables * (2 * sizeof(ngx_stream_script_copy_code_t) | |
| 417 + sizeof(ngx_stream_script_var_code_t)) | |
| 418 + sizeof(uintptr_t) | |
| 419 + sc->source->len | |
| 420 + sizeof(uintptr_t) - 1) | |
| 421 & ~(sizeof(uintptr_t) - 1); | |
| 422 | |
| 423 *sc->values = ngx_array_create(sc->cf->pool, n, 1); | |
| 424 if (*sc->values == NULL) { | |
| 425 return NGX_ERROR; | |
| 426 } | |
| 427 } | |
| 428 | |
| 429 sc->variables = 0; | |
| 430 | |
| 431 return NGX_OK; | |
| 432 } | |
| 433 | |
| 434 | |
| 435 static ngx_int_t | |
| 436 ngx_stream_script_done(ngx_stream_script_compile_t *sc) | |
| 437 { | |
| 438 ngx_str_t zero; | |
| 439 uintptr_t *code; | |
| 440 | |
| 441 if (sc->zero) { | |
| 442 | |
| 443 zero.len = 1; | |
| 444 zero.data = (u_char *) "\0"; | |
| 445 | |
| 446 if (ngx_stream_script_add_copy_code(sc, &zero, 0) != NGX_OK) { | |
| 447 return NGX_ERROR; | |
| 448 } | |
| 449 } | |
| 450 | |
| 451 if (sc->conf_prefix || sc->root_prefix) { | |
| 452 if (ngx_stream_script_add_full_name_code(sc) != NGX_OK) { | |
| 453 return NGX_ERROR; | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 if (sc->complete_lengths) { | |
| 458 code = ngx_stream_script_add_code(*sc->lengths, sizeof(uintptr_t), | |
| 459 NULL); | |
| 460 if (code == NULL) { | |
| 461 return NGX_ERROR; | |
| 462 } | |
| 463 | |
| 464 *code = (uintptr_t) NULL; | |
| 465 } | |
| 466 | |
| 467 if (sc->complete_values) { | |
| 468 code = ngx_stream_script_add_code(*sc->values, sizeof(uintptr_t), | |
| 469 &sc->main); | |
| 470 if (code == NULL) { | |
| 471 return NGX_ERROR; | |
| 472 } | |
| 473 | |
| 474 *code = (uintptr_t) NULL; | |
| 475 } | |
| 476 | |
| 477 return NGX_OK; | |
| 478 } | |
| 479 | |
| 480 | |
| 481 void * | |
| 482 ngx_stream_script_add_code(ngx_array_t *codes, size_t size, void *code) | |
| 483 { | |
| 484 u_char *elts, **p; | |
| 485 void *new; | |
| 486 | |
| 487 elts = codes->elts; | |
| 488 | |
| 489 new = ngx_array_push_n(codes, size); | |
| 490 if (new == NULL) { | |
| 491 return NULL; | |
| 492 } | |
| 493 | |
| 494 if (code) { | |
| 495 if (elts != codes->elts) { | |
| 496 p = code; | |
| 497 *p += (u_char *) codes->elts - elts; | |
| 498 } | |
| 499 } | |
| 500 | |
| 501 return new; | |
| 502 } | |
| 503 | |
| 504 | |
| 505 static ngx_int_t | |
| 506 ngx_stream_script_add_copy_code(ngx_stream_script_compile_t *sc, | |
| 507 ngx_str_t *value, ngx_uint_t last) | |
| 508 { | |
| 509 u_char *p; | |
| 510 size_t size, len, zero; | |
| 511 ngx_stream_script_copy_code_t *code; | |
| 512 | |
| 513 zero = (sc->zero && last); | |
| 514 len = value->len + zero; | |
| 515 | |
| 516 code = ngx_stream_script_add_code(*sc->lengths, | |
| 517 sizeof(ngx_stream_script_copy_code_t), | |
| 518 NULL); | |
| 519 if (code == NULL) { | |
| 520 return NGX_ERROR; | |
| 521 } | |
| 522 | |
| 523 code->code = (ngx_stream_script_code_pt) ngx_stream_script_copy_len_code; | |
| 524 code->len = len; | |
| 525 | |
| 526 size = (sizeof(ngx_stream_script_copy_code_t) + len + sizeof(uintptr_t) - 1) | |
| 527 & ~(sizeof(uintptr_t) - 1); | |
| 528 | |
| 529 code = ngx_stream_script_add_code(*sc->values, size, &sc->main); | |
| 530 if (code == NULL) { | |
| 531 return NGX_ERROR; | |
| 532 } | |
| 533 | |
| 534 code->code = ngx_stream_script_copy_code; | |
| 535 code->len = len; | |
| 536 | |
| 537 p = ngx_cpymem((u_char *) code + sizeof(ngx_stream_script_copy_code_t), | |
| 538 value->data, value->len); | |
| 539 | |
| 540 if (zero) { | |
| 541 *p = '\0'; | |
| 542 sc->zero = 0; | |
| 543 } | |
| 544 | |
| 545 return NGX_OK; | |
| 546 } | |
| 547 | |
| 548 | |
| 549 size_t | |
| 550 ngx_stream_script_copy_len_code(ngx_stream_script_engine_t *e) | |
| 551 { | |
| 552 ngx_stream_script_copy_code_t *code; | |
| 553 | |
| 554 code = (ngx_stream_script_copy_code_t *) e->ip; | |
| 555 | |
| 556 e->ip += sizeof(ngx_stream_script_copy_code_t); | |
| 557 | |
| 558 return code->len; | |
| 559 } | |
| 560 | |
| 561 | |
| 562 void | |
| 563 ngx_stream_script_copy_code(ngx_stream_script_engine_t *e) | |
| 564 { | |
| 565 u_char *p; | |
| 566 ngx_stream_script_copy_code_t *code; | |
| 567 | |
| 568 code = (ngx_stream_script_copy_code_t *) e->ip; | |
| 569 | |
| 570 p = e->pos; | |
| 571 | |
| 572 if (!e->skip) { | |
| 573 e->pos = ngx_copy(p, e->ip + sizeof(ngx_stream_script_copy_code_t), | |
| 574 code->len); | |
| 575 } | |
| 576 | |
| 577 e->ip += sizeof(ngx_stream_script_copy_code_t) | |
| 578 + ((code->len + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1)); | |
| 579 | |
| 580 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, | |
| 581 "stream script copy: \"%*s\"", e->pos - p, p); | |
| 582 } | |
| 583 | |
| 584 | |
| 585 static ngx_int_t | |
| 586 ngx_stream_script_add_var_code(ngx_stream_script_compile_t *sc, ngx_str_t *name) | |
| 587 { | |
| 588 ngx_int_t index, *p; | |
| 589 ngx_stream_script_var_code_t *code; | |
| 590 | |
| 591 index = ngx_stream_get_variable_index(sc->cf, name); | |
| 592 | |
| 593 if (index == NGX_ERROR) { | |
| 594 return NGX_ERROR; | |
| 595 } | |
| 596 | |
| 597 if (sc->flushes) { | |
| 598 p = ngx_array_push(*sc->flushes); | |
| 599 if (p == NULL) { | |
| 600 return NGX_ERROR; | |
| 601 } | |
| 602 | |
| 603 *p = index; | |
| 604 } | |
| 605 | |
| 606 code = ngx_stream_script_add_code(*sc->lengths, | |
| 607 sizeof(ngx_stream_script_var_code_t), | |
| 608 NULL); | |
| 609 if (code == NULL) { | |
| 610 return NGX_ERROR; | |
| 611 } | |
| 612 | |
| 613 code->code = (ngx_stream_script_code_pt) | |
| 614 ngx_stream_script_copy_var_len_code; | |
| 615 code->index = (uintptr_t) index; | |
| 616 | |
| 617 code = ngx_stream_script_add_code(*sc->values, | |
| 618 sizeof(ngx_stream_script_var_code_t), | |
| 619 &sc->main); | |
| 620 if (code == NULL) { | |
| 621 return NGX_ERROR; | |
| 622 } | |
| 623 | |
| 624 code->code = ngx_stream_script_copy_var_code; | |
| 625 code->index = (uintptr_t) index; | |
| 626 | |
| 627 return NGX_OK; | |
| 628 } | |
| 629 | |
| 630 | |
| 631 size_t | |
| 632 ngx_stream_script_copy_var_len_code(ngx_stream_script_engine_t *e) | |
| 633 { | |
| 634 ngx_stream_variable_value_t *value; | |
| 635 ngx_stream_script_var_code_t *code; | |
| 636 | |
| 637 code = (ngx_stream_script_var_code_t *) e->ip; | |
| 638 | |
| 639 e->ip += sizeof(ngx_stream_script_var_code_t); | |
| 640 | |
| 641 if (e->flushed) { | |
| 642 value = ngx_stream_get_indexed_variable(e->session, code->index); | |
| 643 | |
| 644 } else { | |
| 645 value = ngx_stream_get_flushed_variable(e->session, code->index); | |
| 646 } | |
| 647 | |
| 648 if (value && !value->not_found) { | |
| 649 return value->len; | |
| 650 } | |
| 651 | |
| 652 return 0; | |
| 653 } | |
| 654 | |
| 655 | |
| 656 void | |
| 657 ngx_stream_script_copy_var_code(ngx_stream_script_engine_t *e) | |
| 658 { | |
| 659 u_char *p; | |
| 660 ngx_stream_variable_value_t *value; | |
| 661 ngx_stream_script_var_code_t *code; | |
| 662 | |
| 663 code = (ngx_stream_script_var_code_t *) e->ip; | |
| 664 | |
| 665 e->ip += sizeof(ngx_stream_script_var_code_t); | |
| 666 | |
| 667 if (!e->skip) { | |
| 668 | |
| 669 if (e->flushed) { | |
| 670 value = ngx_stream_get_indexed_variable(e->session, code->index); | |
| 671 | |
| 672 } else { | |
| 673 value = ngx_stream_get_flushed_variable(e->session, code->index); | |
| 674 } | |
| 675 | |
| 676 if (value && !value->not_found) { | |
| 677 p = e->pos; | |
| 678 e->pos = ngx_copy(p, value->data, value->len); | |
| 679 | |
| 680 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, | |
| 681 e->session->connection->log, 0, | |
| 682 "stream script var: \"%*s\"", e->pos - p, p); | |
| 683 } | |
| 684 } | |
| 685 } | |
| 686 | |
| 687 | |
| 688 #if (NGX_PCRE) | |
| 689 | |
| 690 static ngx_int_t | |
| 691 ngx_stream_script_add_capture_code(ngx_stream_script_compile_t *sc, | |
| 692 ngx_uint_t n) | |
| 693 { | |
| 694 ngx_stream_script_copy_capture_code_t *code; | |
| 695 | |
| 696 code = ngx_stream_script_add_code(*sc->lengths, | |
| 697 sizeof(ngx_stream_script_copy_capture_code_t), | |
| 698 NULL); | |
| 699 if (code == NULL) { | |
| 700 return NGX_ERROR; | |
| 701 } | |
| 702 | |
| 703 code->code = (ngx_stream_script_code_pt) | |
| 704 ngx_stream_script_copy_capture_len_code; | |
| 705 code->n = 2 * n; | |
| 706 | |
| 707 | |
| 708 code = ngx_stream_script_add_code(*sc->values, | |
| 709 sizeof(ngx_stream_script_copy_capture_code_t), | |
| 710 &sc->main); | |
| 711 if (code == NULL) { | |
| 712 return NGX_ERROR; | |
| 713 } | |
| 714 | |
| 715 code->code = ngx_stream_script_copy_capture_code; | |
| 716 code->n = 2 * n; | |
| 717 | |
| 718 if (sc->ncaptures < n) { | |
| 719 sc->ncaptures = n; | |
| 720 } | |
| 721 | |
| 722 return NGX_OK; | |
| 723 } | |
| 724 | |
| 725 | |
| 726 size_t | |
| 727 ngx_stream_script_copy_capture_len_code(ngx_stream_script_engine_t *e) | |
| 728 { | |
| 729 int *cap; | |
| 730 ngx_uint_t n; | |
| 731 ngx_stream_session_t *s; | |
| 732 ngx_stream_script_copy_capture_code_t *code; | |
| 733 | |
| 734 s = e->session; | |
| 735 | |
| 736 code = (ngx_stream_script_copy_capture_code_t *) e->ip; | |
| 737 | |
| 738 e->ip += sizeof(ngx_stream_script_copy_capture_code_t); | |
| 739 | |
| 740 n = code->n; | |
| 741 | |
| 742 if (n < s->ncaptures) { | |
| 743 cap = s->captures; | |
| 744 return cap[n + 1] - cap[n]; | |
| 745 } | |
| 746 | |
| 747 return 0; | |
| 748 } | |
| 749 | |
| 750 | |
| 751 void | |
| 752 ngx_stream_script_copy_capture_code(ngx_stream_script_engine_t *e) | |
| 753 { | |
| 754 int *cap; | |
| 755 u_char *p, *pos; | |
| 756 ngx_uint_t n; | |
| 757 ngx_stream_session_t *s; | |
| 758 ngx_stream_script_copy_capture_code_t *code; | |
| 759 | |
| 760 s = e->session; | |
| 761 | |
| 762 code = (ngx_stream_script_copy_capture_code_t *) e->ip; | |
| 763 | |
| 764 e->ip += sizeof(ngx_stream_script_copy_capture_code_t); | |
| 765 | |
| 766 n = code->n; | |
| 767 | |
| 768 pos = e->pos; | |
| 769 | |
| 770 if (n < s->ncaptures) { | |
| 771 cap = s->captures; | |
| 772 p = s->captures_data; | |
| 773 e->pos = ngx_copy(pos, &p[cap[n]], cap[n + 1] - cap[n]); | |
| 774 } | |
| 775 | |
| 776 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, | |
| 777 "stream script capture: \"%*s\"", e->pos - pos, pos); | |
| 778 } | |
| 779 | |
| 780 #endif | |
| 781 | |
| 782 | |
| 783 static ngx_int_t | |
| 784 ngx_stream_script_add_full_name_code(ngx_stream_script_compile_t *sc) | |
| 785 { | |
| 786 ngx_stream_script_full_name_code_t *code; | |
| 787 | |
| 788 code = ngx_stream_script_add_code(*sc->lengths, | |
| 789 sizeof(ngx_stream_script_full_name_code_t), | |
| 790 NULL); | |
| 791 if (code == NULL) { | |
| 792 return NGX_ERROR; | |
| 793 } | |
| 794 | |
| 795 code->code = (ngx_stream_script_code_pt) | |
| 796 ngx_stream_script_full_name_len_code; | |
| 797 code->conf_prefix = sc->conf_prefix; | |
| 798 | |
| 799 code = ngx_stream_script_add_code(*sc->values, | |
| 800 sizeof(ngx_stream_script_full_name_code_t), &sc->main); | |
| 801 if (code == NULL) { | |
| 802 return NGX_ERROR; | |
| 803 } | |
| 804 | |
| 805 code->code = ngx_stream_script_full_name_code; | |
| 806 code->conf_prefix = sc->conf_prefix; | |
| 807 | |
| 808 return NGX_OK; | |
| 809 } | |
| 810 | |
| 811 | |
| 812 static size_t | |
| 813 ngx_stream_script_full_name_len_code(ngx_stream_script_engine_t *e) | |
| 814 { | |
| 815 ngx_stream_script_full_name_code_t *code; | |
| 816 | |
| 817 code = (ngx_stream_script_full_name_code_t *) e->ip; | |
| 818 | |
| 819 e->ip += sizeof(ngx_stream_script_full_name_code_t); | |
| 820 | |
| 821 return code->conf_prefix ? ngx_cycle->conf_prefix.len: | |
| 822 ngx_cycle->prefix.len; | |
| 823 } | |
| 824 | |
| 825 | |
| 826 static void | |
| 827 ngx_stream_script_full_name_code(ngx_stream_script_engine_t *e) | |
| 828 { | |
| 829 ngx_stream_script_full_name_code_t *code; | |
| 830 | |
| 831 ngx_str_t value, *prefix; | |
| 832 | |
| 833 code = (ngx_stream_script_full_name_code_t *) e->ip; | |
| 834 | |
| 835 value.data = e->buf.data; | |
| 836 value.len = e->pos - e->buf.data; | |
| 837 | |
| 838 prefix = code->conf_prefix ? (ngx_str_t *) &ngx_cycle->conf_prefix: | |
| 839 (ngx_str_t *) &ngx_cycle->prefix; | |
| 840 | |
| 841 if (ngx_get_full_name(e->session->connection->pool, prefix, &value) | |
| 842 != NGX_OK) | |
| 843 { | |
| 844 e->ip = ngx_stream_script_exit; | |
| 845 return; | |
| 846 } | |
| 847 | |
| 848 e->buf = value; | |
| 849 | |
| 850 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, | |
| 851 "stream script fullname: \"%V\"", &value); | |
| 852 | |
| 853 e->ip += sizeof(ngx_stream_script_full_name_code_t); | |
| 854 } |