Mercurial > hg > nginx
annotate src/stream/ngx_stream_script.c @ 7384:fdc19a3289c1 stable-1.14
Mp4: fixed reading 64-bit atoms.
Previously there was no validation for the size of a 64-bit atom
in an mp4 file. This could lead to a CPU hog when the size is 0,
or various other problems due to integer underflow when calculating
atom data size, including segmentation fault or worker process
memory disclosure.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Tue, 06 Nov 2018 16:29:18 +0300 |
parents | 39ff6939266e |
children | 9e25a5380a21 |
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) { | |
6940
39ff6939266e
Unified error messages about duplicate directives.
Ruslan Ermilov <ru@nginx.com>
parents:
6678
diff
changeset
|
225 return "is duplicate"; |
6607 | 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 | |
6678 | 391 u_char * |
392 ngx_stream_script_run(ngx_stream_session_t *s, ngx_str_t *value, | |
393 void *code_lengths, size_t len, void *code_values) | |
394 { | |
395 ngx_uint_t i; | |
396 ngx_stream_script_code_pt code; | |
397 ngx_stream_script_engine_t e; | |
398 ngx_stream_core_main_conf_t *cmcf; | |
399 ngx_stream_script_len_code_pt lcode; | |
400 | |
401 cmcf = ngx_stream_get_module_main_conf(s, ngx_stream_core_module); | |
402 | |
403 for (i = 0; i < cmcf->variables.nelts; i++) { | |
404 if (s->variables[i].no_cacheable) { | |
405 s->variables[i].valid = 0; | |
406 s->variables[i].not_found = 0; | |
407 } | |
408 } | |
409 | |
410 ngx_memzero(&e, sizeof(ngx_stream_script_engine_t)); | |
411 | |
412 e.ip = code_lengths; | |
413 e.session = s; | |
414 e.flushed = 1; | |
415 | |
416 while (*(uintptr_t *) e.ip) { | |
417 lcode = *(ngx_stream_script_len_code_pt *) e.ip; | |
418 len += lcode(&e); | |
419 } | |
420 | |
421 | |
422 value->len = len; | |
423 value->data = ngx_pnalloc(s->connection->pool, len); | |
424 if (value->data == NULL) { | |
425 return NULL; | |
426 } | |
427 | |
428 e.ip = code_values; | |
429 e.pos = value->data; | |
430 | |
431 while (*(uintptr_t *) e.ip) { | |
432 code = *(ngx_stream_script_code_pt *) e.ip; | |
433 code((ngx_stream_script_engine_t *) &e); | |
434 } | |
435 | |
436 return e.pos; | |
437 } | |
438 | |
439 | |
440 void | |
441 ngx_stream_script_flush_no_cacheable_variables(ngx_stream_session_t *s, | |
442 ngx_array_t *indices) | |
443 { | |
444 ngx_uint_t n, *index; | |
445 | |
446 if (indices) { | |
447 index = indices->elts; | |
448 for (n = 0; n < indices->nelts; n++) { | |
449 if (s->variables[index[n]].no_cacheable) { | |
450 s->variables[index[n]].valid = 0; | |
451 s->variables[index[n]].not_found = 0; | |
452 } | |
453 } | |
454 } | |
455 } | |
456 | |
457 | |
6607 | 458 static ngx_int_t |
459 ngx_stream_script_init_arrays(ngx_stream_script_compile_t *sc) | |
460 { | |
461 ngx_uint_t n; | |
462 | |
463 if (sc->flushes && *sc->flushes == NULL) { | |
464 n = sc->variables ? sc->variables : 1; | |
465 *sc->flushes = ngx_array_create(sc->cf->pool, n, sizeof(ngx_uint_t)); | |
466 if (*sc->flushes == NULL) { | |
467 return NGX_ERROR; | |
468 } | |
469 } | |
470 | |
471 if (*sc->lengths == NULL) { | |
472 n = sc->variables * (2 * sizeof(ngx_stream_script_copy_code_t) | |
473 + sizeof(ngx_stream_script_var_code_t)) | |
474 + sizeof(uintptr_t); | |
475 | |
476 *sc->lengths = ngx_array_create(sc->cf->pool, n, 1); | |
477 if (*sc->lengths == NULL) { | |
478 return NGX_ERROR; | |
479 } | |
480 } | |
481 | |
482 if (*sc->values == NULL) { | |
483 n = (sc->variables * (2 * sizeof(ngx_stream_script_copy_code_t) | |
484 + sizeof(ngx_stream_script_var_code_t)) | |
485 + sizeof(uintptr_t) | |
486 + sc->source->len | |
487 + sizeof(uintptr_t) - 1) | |
488 & ~(sizeof(uintptr_t) - 1); | |
489 | |
490 *sc->values = ngx_array_create(sc->cf->pool, n, 1); | |
491 if (*sc->values == NULL) { | |
492 return NGX_ERROR; | |
493 } | |
494 } | |
495 | |
496 sc->variables = 0; | |
497 | |
498 return NGX_OK; | |
499 } | |
500 | |
501 | |
502 static ngx_int_t | |
503 ngx_stream_script_done(ngx_stream_script_compile_t *sc) | |
504 { | |
505 ngx_str_t zero; | |
506 uintptr_t *code; | |
507 | |
508 if (sc->zero) { | |
509 | |
510 zero.len = 1; | |
511 zero.data = (u_char *) "\0"; | |
512 | |
513 if (ngx_stream_script_add_copy_code(sc, &zero, 0) != NGX_OK) { | |
514 return NGX_ERROR; | |
515 } | |
516 } | |
517 | |
518 if (sc->conf_prefix || sc->root_prefix) { | |
519 if (ngx_stream_script_add_full_name_code(sc) != NGX_OK) { | |
520 return NGX_ERROR; | |
521 } | |
522 } | |
523 | |
524 if (sc->complete_lengths) { | |
525 code = ngx_stream_script_add_code(*sc->lengths, sizeof(uintptr_t), | |
526 NULL); | |
527 if (code == NULL) { | |
528 return NGX_ERROR; | |
529 } | |
530 | |
531 *code = (uintptr_t) NULL; | |
532 } | |
533 | |
534 if (sc->complete_values) { | |
535 code = ngx_stream_script_add_code(*sc->values, sizeof(uintptr_t), | |
536 &sc->main); | |
537 if (code == NULL) { | |
538 return NGX_ERROR; | |
539 } | |
540 | |
541 *code = (uintptr_t) NULL; | |
542 } | |
543 | |
544 return NGX_OK; | |
545 } | |
546 | |
547 | |
548 void * | |
549 ngx_stream_script_add_code(ngx_array_t *codes, size_t size, void *code) | |
550 { | |
551 u_char *elts, **p; | |
552 void *new; | |
553 | |
554 elts = codes->elts; | |
555 | |
556 new = ngx_array_push_n(codes, size); | |
557 if (new == NULL) { | |
558 return NULL; | |
559 } | |
560 | |
561 if (code) { | |
562 if (elts != codes->elts) { | |
563 p = code; | |
564 *p += (u_char *) codes->elts - elts; | |
565 } | |
566 } | |
567 | |
568 return new; | |
569 } | |
570 | |
571 | |
572 static ngx_int_t | |
573 ngx_stream_script_add_copy_code(ngx_stream_script_compile_t *sc, | |
574 ngx_str_t *value, ngx_uint_t last) | |
575 { | |
576 u_char *p; | |
577 size_t size, len, zero; | |
578 ngx_stream_script_copy_code_t *code; | |
579 | |
580 zero = (sc->zero && last); | |
581 len = value->len + zero; | |
582 | |
583 code = ngx_stream_script_add_code(*sc->lengths, | |
584 sizeof(ngx_stream_script_copy_code_t), | |
585 NULL); | |
586 if (code == NULL) { | |
587 return NGX_ERROR; | |
588 } | |
589 | |
590 code->code = (ngx_stream_script_code_pt) ngx_stream_script_copy_len_code; | |
591 code->len = len; | |
592 | |
593 size = (sizeof(ngx_stream_script_copy_code_t) + len + sizeof(uintptr_t) - 1) | |
594 & ~(sizeof(uintptr_t) - 1); | |
595 | |
596 code = ngx_stream_script_add_code(*sc->values, size, &sc->main); | |
597 if (code == NULL) { | |
598 return NGX_ERROR; | |
599 } | |
600 | |
601 code->code = ngx_stream_script_copy_code; | |
602 code->len = len; | |
603 | |
604 p = ngx_cpymem((u_char *) code + sizeof(ngx_stream_script_copy_code_t), | |
605 value->data, value->len); | |
606 | |
607 if (zero) { | |
608 *p = '\0'; | |
609 sc->zero = 0; | |
610 } | |
611 | |
612 return NGX_OK; | |
613 } | |
614 | |
615 | |
616 size_t | |
617 ngx_stream_script_copy_len_code(ngx_stream_script_engine_t *e) | |
618 { | |
619 ngx_stream_script_copy_code_t *code; | |
620 | |
621 code = (ngx_stream_script_copy_code_t *) e->ip; | |
622 | |
623 e->ip += sizeof(ngx_stream_script_copy_code_t); | |
624 | |
625 return code->len; | |
626 } | |
627 | |
628 | |
629 void | |
630 ngx_stream_script_copy_code(ngx_stream_script_engine_t *e) | |
631 { | |
632 u_char *p; | |
633 ngx_stream_script_copy_code_t *code; | |
634 | |
635 code = (ngx_stream_script_copy_code_t *) e->ip; | |
636 | |
637 p = e->pos; | |
638 | |
639 if (!e->skip) { | |
640 e->pos = ngx_copy(p, e->ip + sizeof(ngx_stream_script_copy_code_t), | |
641 code->len); | |
642 } | |
643 | |
644 e->ip += sizeof(ngx_stream_script_copy_code_t) | |
645 + ((code->len + sizeof(uintptr_t) - 1) & ~(sizeof(uintptr_t) - 1)); | |
646 | |
647 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, | |
648 "stream script copy: \"%*s\"", e->pos - p, p); | |
649 } | |
650 | |
651 | |
652 static ngx_int_t | |
653 ngx_stream_script_add_var_code(ngx_stream_script_compile_t *sc, ngx_str_t *name) | |
654 { | |
655 ngx_int_t index, *p; | |
656 ngx_stream_script_var_code_t *code; | |
657 | |
658 index = ngx_stream_get_variable_index(sc->cf, name); | |
659 | |
660 if (index == NGX_ERROR) { | |
661 return NGX_ERROR; | |
662 } | |
663 | |
664 if (sc->flushes) { | |
665 p = ngx_array_push(*sc->flushes); | |
666 if (p == NULL) { | |
667 return NGX_ERROR; | |
668 } | |
669 | |
670 *p = index; | |
671 } | |
672 | |
673 code = ngx_stream_script_add_code(*sc->lengths, | |
674 sizeof(ngx_stream_script_var_code_t), | |
675 NULL); | |
676 if (code == NULL) { | |
677 return NGX_ERROR; | |
678 } | |
679 | |
680 code->code = (ngx_stream_script_code_pt) | |
681 ngx_stream_script_copy_var_len_code; | |
682 code->index = (uintptr_t) index; | |
683 | |
684 code = ngx_stream_script_add_code(*sc->values, | |
685 sizeof(ngx_stream_script_var_code_t), | |
686 &sc->main); | |
687 if (code == NULL) { | |
688 return NGX_ERROR; | |
689 } | |
690 | |
691 code->code = ngx_stream_script_copy_var_code; | |
692 code->index = (uintptr_t) index; | |
693 | |
694 return NGX_OK; | |
695 } | |
696 | |
697 | |
698 size_t | |
699 ngx_stream_script_copy_var_len_code(ngx_stream_script_engine_t *e) | |
700 { | |
701 ngx_stream_variable_value_t *value; | |
702 ngx_stream_script_var_code_t *code; | |
703 | |
704 code = (ngx_stream_script_var_code_t *) e->ip; | |
705 | |
706 e->ip += sizeof(ngx_stream_script_var_code_t); | |
707 | |
708 if (e->flushed) { | |
709 value = ngx_stream_get_indexed_variable(e->session, code->index); | |
710 | |
711 } else { | |
712 value = ngx_stream_get_flushed_variable(e->session, code->index); | |
713 } | |
714 | |
715 if (value && !value->not_found) { | |
716 return value->len; | |
717 } | |
718 | |
719 return 0; | |
720 } | |
721 | |
722 | |
723 void | |
724 ngx_stream_script_copy_var_code(ngx_stream_script_engine_t *e) | |
725 { | |
726 u_char *p; | |
727 ngx_stream_variable_value_t *value; | |
728 ngx_stream_script_var_code_t *code; | |
729 | |
730 code = (ngx_stream_script_var_code_t *) e->ip; | |
731 | |
732 e->ip += sizeof(ngx_stream_script_var_code_t); | |
733 | |
734 if (!e->skip) { | |
735 | |
736 if (e->flushed) { | |
737 value = ngx_stream_get_indexed_variable(e->session, code->index); | |
738 | |
739 } else { | |
740 value = ngx_stream_get_flushed_variable(e->session, code->index); | |
741 } | |
742 | |
743 if (value && !value->not_found) { | |
744 p = e->pos; | |
745 e->pos = ngx_copy(p, value->data, value->len); | |
746 | |
747 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, | |
748 e->session->connection->log, 0, | |
749 "stream script var: \"%*s\"", e->pos - p, p); | |
750 } | |
751 } | |
752 } | |
753 | |
754 | |
755 #if (NGX_PCRE) | |
756 | |
757 static ngx_int_t | |
758 ngx_stream_script_add_capture_code(ngx_stream_script_compile_t *sc, | |
759 ngx_uint_t n) | |
760 { | |
761 ngx_stream_script_copy_capture_code_t *code; | |
762 | |
763 code = ngx_stream_script_add_code(*sc->lengths, | |
764 sizeof(ngx_stream_script_copy_capture_code_t), | |
765 NULL); | |
766 if (code == NULL) { | |
767 return NGX_ERROR; | |
768 } | |
769 | |
770 code->code = (ngx_stream_script_code_pt) | |
771 ngx_stream_script_copy_capture_len_code; | |
772 code->n = 2 * n; | |
773 | |
774 | |
775 code = ngx_stream_script_add_code(*sc->values, | |
776 sizeof(ngx_stream_script_copy_capture_code_t), | |
777 &sc->main); | |
778 if (code == NULL) { | |
779 return NGX_ERROR; | |
780 } | |
781 | |
782 code->code = ngx_stream_script_copy_capture_code; | |
783 code->n = 2 * n; | |
784 | |
785 if (sc->ncaptures < n) { | |
786 sc->ncaptures = n; | |
787 } | |
788 | |
789 return NGX_OK; | |
790 } | |
791 | |
792 | |
793 size_t | |
794 ngx_stream_script_copy_capture_len_code(ngx_stream_script_engine_t *e) | |
795 { | |
796 int *cap; | |
797 ngx_uint_t n; | |
798 ngx_stream_session_t *s; | |
799 ngx_stream_script_copy_capture_code_t *code; | |
800 | |
801 s = e->session; | |
802 | |
803 code = (ngx_stream_script_copy_capture_code_t *) e->ip; | |
804 | |
805 e->ip += sizeof(ngx_stream_script_copy_capture_code_t); | |
806 | |
807 n = code->n; | |
808 | |
809 if (n < s->ncaptures) { | |
810 cap = s->captures; | |
811 return cap[n + 1] - cap[n]; | |
812 } | |
813 | |
814 return 0; | |
815 } | |
816 | |
817 | |
818 void | |
819 ngx_stream_script_copy_capture_code(ngx_stream_script_engine_t *e) | |
820 { | |
821 int *cap; | |
822 u_char *p, *pos; | |
823 ngx_uint_t n; | |
824 ngx_stream_session_t *s; | |
825 ngx_stream_script_copy_capture_code_t *code; | |
826 | |
827 s = e->session; | |
828 | |
829 code = (ngx_stream_script_copy_capture_code_t *) e->ip; | |
830 | |
831 e->ip += sizeof(ngx_stream_script_copy_capture_code_t); | |
832 | |
833 n = code->n; | |
834 | |
835 pos = e->pos; | |
836 | |
837 if (n < s->ncaptures) { | |
838 cap = s->captures; | |
839 p = s->captures_data; | |
840 e->pos = ngx_copy(pos, &p[cap[n]], cap[n + 1] - cap[n]); | |
841 } | |
842 | |
843 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, | |
844 "stream script capture: \"%*s\"", e->pos - pos, pos); | |
845 } | |
846 | |
847 #endif | |
848 | |
849 | |
850 static ngx_int_t | |
851 ngx_stream_script_add_full_name_code(ngx_stream_script_compile_t *sc) | |
852 { | |
853 ngx_stream_script_full_name_code_t *code; | |
854 | |
855 code = ngx_stream_script_add_code(*sc->lengths, | |
856 sizeof(ngx_stream_script_full_name_code_t), | |
857 NULL); | |
858 if (code == NULL) { | |
859 return NGX_ERROR; | |
860 } | |
861 | |
862 code->code = (ngx_stream_script_code_pt) | |
863 ngx_stream_script_full_name_len_code; | |
864 code->conf_prefix = sc->conf_prefix; | |
865 | |
866 code = ngx_stream_script_add_code(*sc->values, | |
867 sizeof(ngx_stream_script_full_name_code_t), &sc->main); | |
868 if (code == NULL) { | |
869 return NGX_ERROR; | |
870 } | |
871 | |
872 code->code = ngx_stream_script_full_name_code; | |
873 code->conf_prefix = sc->conf_prefix; | |
874 | |
875 return NGX_OK; | |
876 } | |
877 | |
878 | |
879 static size_t | |
880 ngx_stream_script_full_name_len_code(ngx_stream_script_engine_t *e) | |
881 { | |
882 ngx_stream_script_full_name_code_t *code; | |
883 | |
884 code = (ngx_stream_script_full_name_code_t *) e->ip; | |
885 | |
886 e->ip += sizeof(ngx_stream_script_full_name_code_t); | |
887 | |
888 return code->conf_prefix ? ngx_cycle->conf_prefix.len: | |
889 ngx_cycle->prefix.len; | |
890 } | |
891 | |
892 | |
893 static void | |
894 ngx_stream_script_full_name_code(ngx_stream_script_engine_t *e) | |
895 { | |
896 ngx_stream_script_full_name_code_t *code; | |
897 | |
898 ngx_str_t value, *prefix; | |
899 | |
900 code = (ngx_stream_script_full_name_code_t *) e->ip; | |
901 | |
902 value.data = e->buf.data; | |
903 value.len = e->pos - e->buf.data; | |
904 | |
905 prefix = code->conf_prefix ? (ngx_str_t *) &ngx_cycle->conf_prefix: | |
906 (ngx_str_t *) &ngx_cycle->prefix; | |
907 | |
908 if (ngx_get_full_name(e->session->connection->pool, prefix, &value) | |
909 != NGX_OK) | |
910 { | |
911 e->ip = ngx_stream_script_exit; | |
912 return; | |
913 } | |
914 | |
915 e->buf = value; | |
916 | |
917 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, e->session->connection->log, 0, | |
918 "stream script fullname: \"%V\"", &value); | |
919 | |
920 e->ip += sizeof(ngx_stream_script_full_name_code_t); | |
921 } |