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_http.h>
11
12
13 #define NGX_HTTP_USERID_OFF 0
14 #define NGX_HTTP_USERID_LOG 1
15 #define NGX_HTTP_USERID_V1 2
16 #define NGX_HTTP_USERID_ON 3
17
18 /* 31 Dec 2037 23:55:55 GMT */
19 #define NGX_HTTP_USERID_MAX_EXPIRES 2145916555
20
21
22 typedef struct {
23 ngx_uint_t enable;
24
25 ngx_int_t service;
26
27 ngx_str_t name;
28 ngx_str_t domain;
29 ngx_str_t path;
30 ngx_str_t p3p;
31
32 time_t expires;
33
34 u_char mark;
35 } ngx_http_userid_conf_t;
36
37
38 typedef struct {
39 uint32_t uid_got[4];
40 uint32_t uid_set[4];
41 ngx_str_t cookie;
42 ngx_uint_t reset;
43 } ngx_http_userid_ctx_t;
44
45
46 static ngx_http_userid_ctx_t *ngx_http_userid_get_uid(ngx_http_request_t *r,
47 ngx_http_userid_conf_t *conf);
48 static ngx_int_t ngx_http_userid_variable(ngx_http_request_t *r,
49 ngx_http_variable_value_t *v, ngx_str_t *name, uint32_t *uid);
50 static ngx_int_t ngx_http_userid_set_uid(ngx_http_request_t *r,
51 ngx_http_userid_ctx_t *ctx, ngx_http_userid_conf_t *conf);
52 static ngx_int_t ngx_http_userid_create_uid(ngx_http_request_t *r,
53 ngx_http_userid_ctx_t *ctx, ngx_http_userid_conf_t *conf);
54
55 static ngx_int_t ngx_http_userid_add_variables(ngx_conf_t *cf);
56 static ngx_int_t ngx_http_userid_init(ngx_conf_t *cf);
57 static void *ngx_http_userid_create_conf(ngx_conf_t *cf);
58 static char *ngx_http_userid_merge_conf(ngx_conf_t *cf, void *parent,
59 void *child);
60 static char *ngx_http_userid_domain(ngx_conf_t *cf, void *post, void *data);
61 static char *ngx_http_userid_path(ngx_conf_t *cf, void *post, void *data);
62 static char *ngx_http_userid_expires(ngx_conf_t *cf, ngx_command_t *cmd,
63 void *conf);
64 static char *ngx_http_userid_p3p(ngx_conf_t *cf, void *post, void *data);
65 static char *ngx_http_userid_mark(ngx_conf_t *cf, ngx_command_t *cmd,
66 void *conf);
67 static ngx_int_t ngx_http_userid_init_worker(ngx_cycle_t *cycle);
68
69
70
71 static uint32_t start_value;
72 static uint32_t sequencer_v1 = 1;
73 static uint32_t sequencer_v2 = 0x03030302;
74
75
76 static u_char expires[] = "; expires=Thu, 31-Dec-37 23:55:55 GMT";
77
78
79 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
80
81
82 static ngx_conf_enum_t ngx_http_userid_state[] = {
83 { ngx_string("off"), NGX_HTTP_USERID_OFF },
84 { ngx_string("log"), NGX_HTTP_USERID_LOG },
85 { ngx_string("v1"), NGX_HTTP_USERID_V1 },
86 { ngx_string("on"), NGX_HTTP_USERID_ON },
87 { ngx_null_string, 0 }
88 };
89
90
91 static ngx_conf_post_handler_pt ngx_http_userid_domain_p =
92 ngx_http_userid_domain;
93 static ngx_conf_post_handler_pt ngx_http_userid_path_p = ngx_http_userid_path;
94 static ngx_conf_post_handler_pt ngx_http_userid_p3p_p = ngx_http_userid_p3p;
95
96
97 static ngx_command_t ngx_http_userid_commands[] = {
98
99 { ngx_string("userid"),
100 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
101 ngx_conf_set_enum_slot,
102 NGX_HTTP_LOC_CONF_OFFSET,
103 offsetof(ngx_http_userid_conf_t, enable),
104 ngx_http_userid_state },
105
106 { ngx_string("userid_service"),
107 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
108 ngx_conf_set_num_slot,
109 NGX_HTTP_LOC_CONF_OFFSET,
110 offsetof(ngx_http_userid_conf_t, service),
111 NULL },
112
113 { ngx_string("userid_name"),
114 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
115 ngx_conf_set_str_slot,
116 NGX_HTTP_LOC_CONF_OFFSET,
117 offsetof(ngx_http_userid_conf_t, name),
118 NULL },
119
120 { ngx_string("userid_domain"),
121 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
122 ngx_conf_set_str_slot,
123 NGX_HTTP_LOC_CONF_OFFSET,
124 offsetof(ngx_http_userid_conf_t, domain),
125 &ngx_http_userid_domain_p },
126
127 { ngx_string("userid_path"),
128 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
129 ngx_conf_set_str_slot,
130 NGX_HTTP_LOC_CONF_OFFSET,
131 offsetof(ngx_http_userid_conf_t, path),
132 &ngx_http_userid_path_p },
133
134 { ngx_string("userid_expires"),
135 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
136 ngx_http_userid_expires,
137 NGX_HTTP_LOC_CONF_OFFSET,
138 0,
139 NULL },
140
141 { ngx_string("userid_p3p"),
142 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
143 ngx_conf_set_str_slot,
144 NGX_HTTP_LOC_CONF_OFFSET,
145 offsetof(ngx_http_userid_conf_t, p3p),
146 &ngx_http_userid_p3p_p },
147
148 { ngx_string("userid_mark"),
149 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
150 ngx_http_userid_mark,
151 NGX_HTTP_LOC_CONF_OFFSET,
152 0,
153 NULL },
154
155 ngx_null_command
156 };
157
158
159 static ngx_http_module_t ngx_http_userid_filter_module_ctx = {
160 ngx_http_userid_add_variables, /* preconfiguration */
161 ngx_http_userid_init, /* postconfiguration */
162
163 NULL, /* create main configuration */
164 NULL, /* init main configuration */
165
166 NULL, /* create server configuration */
167 NULL, /* merge server configuration */
168
169 ngx_http_userid_create_conf, /* create location configuration */
170 ngx_http_userid_merge_conf /* merge location configuration */
171 };
172
173
174 ngx_module_t ngx_http_userid_filter_module = {
175 NGX_MODULE_V1,
176 &ngx_http_userid_filter_module_ctx, /* module context */
177 ngx_http_userid_commands, /* module directives */
178 NGX_HTTP_MODULE, /* module type */
179 NULL, /* init master */
180 NULL, /* init module */
181 ngx_http_userid_init_worker, /* init process */
182 NULL, /* init thread */
183 NULL, /* exit thread */
184 NULL, /* exit process */
185 NULL, /* exit master */
186 NGX_MODULE_V1_PADDING
187 };
188
189
190 static ngx_str_t ngx_http_userid_got = ngx_string("uid_got");
191 static ngx_str_t ngx_http_userid_set = ngx_string("uid_set");
192 static ngx_str_t ngx_http_userid_reset = ngx_string("uid_reset");
193 static ngx_uint_t ngx_http_userid_reset_index;
194
195
196 static ngx_int_t
197 ngx_http_userid_filter(ngx_http_request_t *r)
198 {
199 ngx_http_userid_ctx_t *ctx;
200 ngx_http_userid_conf_t *conf;
201
202 if (r != r->main) {
203 return ngx_http_next_header_filter(r);
204 }
205
206 conf = ngx_http_get_module_loc_conf(r, ngx_http_userid_filter_module);
207
208 if (conf->enable < NGX_HTTP_USERID_V1) {
209 return ngx_http_next_header_filter(r);
210 }
211
212 ctx = ngx_http_userid_get_uid(r, conf);
213
214 if (ctx == NULL) {
215 return NGX_ERROR;
216 }
217
218 if (ngx_http_userid_set_uid(r, ctx, conf) == NGX_OK) {
219 return ngx_http_next_header_filter(r);
220 }
221
222 return NGX_ERROR;
223 }
224
225
226 static ngx_int_t
227 ngx_http_userid_got_variable(ngx_http_request_t *r,
228 ngx_http_variable_value_t *v, uintptr_t data)
229 {
230 ngx_http_userid_ctx_t *ctx;
231 ngx_http_userid_conf_t *conf;
232
233 conf = ngx_http_get_module_loc_conf(r->main, ngx_http_userid_filter_module);
234
235 if (conf->enable == NGX_HTTP_USERID_OFF) {
236 v->not_found = 1;
237 return NGX_OK;
238 }
239
240 ctx = ngx_http_userid_get_uid(r->main, conf);
241
242 if (ctx == NULL) {
243 return NGX_ERROR;
244 }
245
246 if (ctx->uid_got[3] != 0) {
247 return ngx_http_userid_variable(r->main, v, &conf->name, ctx->uid_got);
248 }
249
250 v->not_found = 1;
251
252 return NGX_OK;
253 }
254
255
256 static ngx_int_t
257 ngx_http_userid_set_variable(ngx_http_request_t *r,
258 ngx_http_variable_value_t *v, uintptr_t data)
259 {
260 ngx_http_userid_ctx_t *ctx;
261 ngx_http_userid_conf_t *conf;
262
263 conf = ngx_http_get_module_loc_conf(r->main, ngx_http_userid_filter_module);
264
265 if (conf->enable < NGX_HTTP_USERID_V1) {
266 v->not_found = 1;
267 return NGX_OK;
268 }
269
270 ctx = ngx_http_userid_get_uid(r->main, conf);
271
272 if (ctx == NULL) {
273 return NGX_ERROR;
274 }
275
276 if (ngx_http_userid_create_uid(r->main, ctx, conf) != NGX_OK) {
277 return NGX_ERROR;
278 }
279
280 if (ctx->uid_set[3] == 0) {
281 v->not_found = 1;
282 return NGX_OK;
283 }
284
285 return ngx_http_userid_variable(r->main, v, &conf->name, ctx->uid_set);
286 }
287
288
289 static ngx_http_userid_ctx_t *
290 ngx_http_userid_get_uid(ngx_http_request_t *r, ngx_http_userid_conf_t *conf)
291 {
292 ngx_int_t n;
293 ngx_str_t src, dst;
294 ngx_table_elt_t **cookies;
295 ngx_http_userid_ctx_t *ctx;
296
297 ctx = ngx_http_get_module_ctx(r, ngx_http_userid_filter_module);
298
299 if (ctx) {
300 return ctx;
301 }
302
303 if (ctx == NULL) {
304 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_userid_ctx_t));
305 if (ctx == NULL) {
306 return NULL;
307 }
308
309 ngx_http_set_ctx(r, ctx, ngx_http_userid_filter_module);
310 }
311
312 n = ngx_http_parse_multi_header_lines(&r->headers_in.cookies, &conf->name,
313 &ctx->cookie);
314 if (n == NGX_DECLINED) {
315 return ctx;
316 }
317
318 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
319 "uid cookie: \"%V\"", &ctx->cookie);
320
321 if (ctx->cookie.len < 22) {
322 cookies = r->headers_in.cookies.elts;
323 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
324 "client sent too short userid cookie \"%V\"",
325 &cookies[n]->value);
326 return ctx;
327 }
328
329 src = ctx->cookie;
330
331 /*
332 * we have to limit the encoded string to 22 characters because
333 * 1) cookie may be marked by "userid_mark",
334 * 2) and there are already the millions cookies with a garbage
335 * instead of the correct base64 trail "=="
336 */
337
338 src.len = 22;
339
340 dst.data = (u_char *) ctx->uid_got;
341
342 if (ngx_decode_base64(&dst, &src) == NGX_ERROR) {
343 cookies = r->headers_in.cookies.elts;
344 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
345 "client sent invalid userid cookie \"%V\"",
346 &cookies[n]->value);
347 return ctx;
348 }
349
350 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
351 "uid: %08XD%08XD%08XD%08XD",
352 ctx->uid_got[0], ctx->uid_got[1],
353 ctx->uid_got[2], ctx->uid_got[3]);
354
355 return ctx;
356 }
357
358
359 static ngx_int_t
360 ngx_http_userid_set_uid(ngx_http_request_t *r, ngx_http_userid_ctx_t *ctx,
361 ngx_http_userid_conf_t *conf)
362 {
363 u_char *cookie, *p;
364 size_t len;
365 ngx_str_t src, dst;
366 ngx_table_elt_t *set_cookie, *p3p;
367
368 if (ngx_http_userid_create_uid(r, ctx, conf) != NGX_OK) {
369 return NGX_ERROR;
370 }
371
372 if (ctx->uid_set[3] == 0) {
373 return NGX_OK;
374 }
375
376 len = conf->name.len + 1 + ngx_base64_encoded_length(16) + conf->path.len;
377
378 if (conf->expires) {
379 len += sizeof(expires) - 1 + 2;
380 }
381
382 if (conf->domain.len) {
383 len += conf->domain.len;
384 }
385
386 cookie = ngx_pnalloc(r->pool, len);
387 if (cookie == NULL) {
388 return NGX_ERROR;
389 }
390
391 p = ngx_copy(cookie, conf->name.data, conf->name.len);
392 *p++ = '=';
393
394 if (ctx->uid_got[3] == 0 || ctx->reset) {
395 src.len = 16;
396 src.data = (u_char *) ctx->uid_set;
397 dst.data = p;
398
399 ngx_encode_base64(&dst, &src);
400
401 p += dst.len;
402
403 if (conf->mark) {
404 *(p - 2) = conf->mark;
405 }
406
407 } else {
408 p = ngx_cpymem(p, ctx->cookie.data, 22);
409 *p++ = conf->mark;
410 *p++ = '=';
411 }
412
413 if (conf->expires == NGX_HTTP_USERID_MAX_EXPIRES) {
414 p = ngx_cpymem(p, expires, sizeof(expires) - 1);
415
416 } else if (conf->expires) {
417 p = ngx_cpymem(p, expires, sizeof("; expires=") - 1);
418 p = ngx_http_cookie_time(p, ngx_time() + conf->expires);
419 }
420
421 p = ngx_copy(p, conf->domain.data, conf->domain.len);
422
423 p = ngx_copy(p, conf->path.data, conf->path.len);
424
425 set_cookie = ngx_list_push(&r->headers_out.headers);
426 if (set_cookie == NULL) {
427 return NGX_ERROR;
428 }
429
430 set_cookie->hash = 1;
431 ngx_str_set(&set_cookie->key, "Set-Cookie");
432 set_cookie->value.len = p - cookie;
433 set_cookie->value.data = cookie;
434
435 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
436 "uid cookie: \"%V\"", &set_cookie->value);
437
438 if (conf->p3p.len == 0) {
439 return NGX_OK;
440 }
441
442 p3p = ngx_list_push(&r->headers_out.headers);
443 if (p3p == NULL) {
444 return NGX_ERROR;
445 }
446
447 p3p->hash = 1;
448 ngx_str_set(&p3p->key, "P3P");
449 p3p->value = conf->p3p;
450
451 return NGX_OK;
452 }
453
454
455 static ngx_int_t
456 ngx_http_userid_create_uid(ngx_http_request_t *r, ngx_http_userid_ctx_t *ctx,
457 ngx_http_userid_conf_t *conf)
458 {
459 ngx_connection_t *c;
460 struct sockaddr_in *sin;
461 ngx_http_variable_value_t *vv;
462 #if (NGX_HAVE_INET6)
463 u_char *p;
464 struct sockaddr_in6 *sin6;
465 #endif
466
467 if (ctx->uid_set[3] != 0) {
468 return NGX_OK;
469 }
470
471 if (ctx->uid_got[3] != 0) {
472
473 vv = ngx_http_get_indexed_variable(r, ngx_http_userid_reset_index);
474
475 if (vv->len == 0 || (vv->len == 1 && vv->data[0] == '')) {
476
477 if (conf->mark == '\0'
478 || (ctx->cookie.len > 23
479 && ctx->cookie.data[22] == conf->mark
480 && ctx->cookie.data[23] == '='))
481 {
482 return NGX_OK;
483 }
484
485 ctx->uid_set[0] = ctx->uid_got[0];
486 ctx->uid_set[1] = ctx->uid_got[1];
487 ctx->uid_set[2] = ctx->uid_got[2];
488 ctx->uid_set[3] = ctx->uid_got[3];
489
490 return NGX_OK;
491
492 } else {
493 ctx->reset = 1;
494
495 if (vv->len == 3 && ngx_strncmp(vv->data, "log", 3) == 0) {
496 ngx_log_error(NGX_LOG_NOTICE, r->connection->log, 0,
497 "userid cookie \"%V=%08XD%08XD%08XD%08XD\" was reset",
498 &conf->name, ctx->uid_got[0], ctx->uid_got[1],
499 ctx->uid_got[2], ctx->uid_got[3]);
500 }
501 }
502 }
503
504 /*
505 * TODO: in the threaded mode the sequencers should be in TLS and their
506 * ranges should be divided between threads
507 */
508
509 if (conf->enable == NGX_HTTP_USERID_V1) {
510 if (conf->service == NGX_CONF_UNSET) {
511 ctx->uid_set[0] = 0;
512 } else {
513 ctx->uid_set[0] = conf->service;
514 }
515 ctx->uid_set[1] = (uint32_t) ngx_time();
516 ctx->uid_set[2] = start_value;
517 ctx->uid_set[3] = sequencer_v1;
518 sequencer_v1 += 0x100;
519
520 } else {
521 if (conf->service == NGX_CONF_UNSET) {
522
523 c = r->connection;
524
525 if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) {
526 return NGX_ERROR;
527 }
528
529 switch (c->local_sockaddr->sa_family) {
530
531 #if (NGX_HAVE_INET6)
532 case AF_INET6:
533 sin6 = (struct sockaddr_in6 *) c->local_sockaddr;
534
535 p = (u_char *) &ctx->uid_set[0];
536
537 *p++ = sin6->sin6_addr.s6_addr[12];
538 *p++ = sin6->sin6_addr.s6_addr[13];
539 *p++ = sin6->sin6_addr.s6_addr[14];
540 *p = sin6->sin6_addr.s6_addr[15];
541
542 break;
543 #endif
544 default: /* AF_INET */
545 sin = (struct sockaddr_in *) c->local_sockaddr;
546 ctx->uid_set[0] = sin->sin_addr.s_addr;
547 break;
548 }
549
550 } else {
551 ctx->uid_set[0] = htonl(conf->service);
552 }
553
554 ctx->uid_set[1] = htonl((uint32_t) ngx_time());
555 ctx->uid_set[2] = htonl(start_value);
556 ctx->uid_set[3] = htonl(sequencer_v2);
557 sequencer_v2 += 0x100;
558 if (sequencer_v2 < 0x03030302) {
559 sequencer_v2 = 0x03030302;
560 }
561 }
562
563 return NGX_OK;
564 }
565
566
567 static ngx_int_t
568 ngx_http_userid_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
569 ngx_str_t *name, uint32_t *uid)
570 {
571 v->len = name->len + sizeof("=00001111222233334444555566667777") - 1;
572 v->data = ngx_pnalloc(r->pool, v->len);
573 if (v->data == NULL) {
574 return NGX_ERROR;
575 }
576
577 v->valid = 1;
578 v->no_cacheable = 0;
579 v->not_found = 0;
580
581 ngx_sprintf(v->data, "%V=%08XD%08XD%08XD%08XD",
582 name, uid[0], uid[1], uid[2], uid[3]);
583
584 return NGX_OK;
585 }
586
587
588 static ngx_int_t
589 ngx_http_userid_reset_variable(ngx_http_request_t *r,
590 ngx_http_variable_value_t *v, uintptr_t data)
591 {
592 *v = ngx_http_variable_null_value;
593
594 return NGX_OK;
595 }
596
597
598 static ngx_int_t
599 ngx_http_userid_add_variables(ngx_conf_t *cf)
600 {
601 ngx_int_t n;
602 ngx_http_variable_t *var;
603
604 var = ngx_http_add_variable(cf, &ngx_http_userid_got, 0);
605 if (var == NULL) {
606 return NGX_ERROR;
607 }
608
609 var->get_handler = ngx_http_userid_got_variable;
610
611 var = ngx_http_add_variable(cf, &ngx_http_userid_set, 0);
612 if (var == NULL) {
613 return NGX_ERROR;
614 }
615
616 var->get_handler = ngx_http_userid_set_variable;
617
618 var = ngx_http_add_variable(cf, &ngx_http_userid_reset,
619 NGX_HTTP_VAR_CHANGEABLE);
620 if (var == NULL) {
621 return NGX_ERROR;
622 }
623
624 var->get_handler = ngx_http_userid_reset_variable;
625
626 n = ngx_http_get_variable_index(cf, &ngx_http_userid_reset);
627 if (n == NGX_ERROR) {
628 return NGX_ERROR;
629 }
630
631 ngx_http_userid_reset_index = n;
632
633 return NGX_OK;
634 }
635
636
637 static void *
638 ngx_http_userid_create_conf(ngx_conf_t *cf)
639 {
640 ngx_http_userid_conf_t *conf;
641
642 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_userid_conf_t));
643 if (conf == NULL) {
644 return NULL;
645 }
646
647 /*
648 * set by ngx_pcalloc():
649 *
650 * conf->name = { 0, NULL };
651 * conf->domain = { 0, NULL };
652 * conf->path = { 0, NULL };
653 * conf->p3p = { 0, NULL };
654 */
655
656 conf->enable = NGX_CONF_UNSET_UINT;
657 conf->service = NGX_CONF_UNSET;
658 conf->expires = NGX_CONF_UNSET;
659 conf->mark = (u_char) '\xFF';
660
661 return conf;
662 }
663
664
665 static char *
666 ngx_http_userid_merge_conf(ngx_conf_t *cf, void *parent, void *child)
667 {
668 ngx_http_userid_conf_t *prev = parent;
669 ngx_http_userid_conf_t *conf = child;
670
671 ngx_conf_merge_uint_value(conf->enable, prev->enable,
672 NGX_HTTP_USERID_OFF);
673
674 ngx_conf_merge_str_value(conf->name, prev->name, "uid");
675 ngx_conf_merge_str_value(conf->domain, prev->domain, "");
676 ngx_conf_merge_str_value(conf->path, prev->path, "; path=/");
677 ngx_conf_merge_str_value(conf->p3p, prev->p3p, "");
678
679 ngx_conf_merge_value(conf->service, prev->service, NGX_CONF_UNSET);
680 ngx_conf_merge_sec_value(conf->expires, prev->expires, 0);
681
682 if (conf->mark == (u_char) '\xFF') {
683 if (prev->mark == (u_char) '\xFF') {
684 conf->mark = '\0';
685 } else {
686 conf->mark = prev->mark;
687 }
688 }
689
690 return NGX_CONF_OK;
691 }
692
693
694 static ngx_int_t
695 ngx_http_userid_init(ngx_conf_t *cf)
696 {
697 ngx_http_next_header_filter = ngx_http_top_header_filter;
698 ngx_http_top_header_filter = ngx_http_userid_filter;
699
700 return NGX_OK;
701 }
702
703
704 static char *
705 ngx_http_userid_domain(ngx_conf_t *cf, void *post, void *data)
706 {
707 ngx_str_t *domain = data;
708
709 u_char *p, *new;
710
711 if (ngx_strcmp(domain->data, "none") == 0) {
712 ngx_str_set(domain, "");
713 return NGX_CONF_OK;
714 }
715
716 new = ngx_pnalloc(cf->pool, sizeof("; domain=") - 1 + domain->len);
717 if (new == NULL) {
718 return NGX_CONF_ERROR;
719 }
720
721 p = ngx_cpymem(new, "; domain=", sizeof("; domain=") - 1);
722 ngx_memcpy(p, domain->data, domain->len);
723
724 domain->len += sizeof("; domain=") - 1;
725 domain->data = new;
726
727 return NGX_CONF_OK;
728 }
729
730
731 static char *
732 ngx_http_userid_path(ngx_conf_t *cf, void *post, void *data)
733 {
734 ngx_str_t *path = data;
735
736 u_char *p, *new;
737
738 new = ngx_pnalloc(cf->pool, sizeof("; path=") - 1 + path->len);
739 if (new == NULL) {
740 return NGX_CONF_ERROR;
741 }
742
743 p = ngx_cpymem(new, "; path=", sizeof("; path=") - 1);
744 ngx_memcpy(p, path->data, path->len);
745
746 path->len += sizeof("; path=") - 1;
747 path->data = new;
748
749 return NGX_CONF_OK;
750 }
751
752
753 static char *
754 ngx_http_userid_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
755 {
756 ngx_http_userid_conf_t *ucf = conf;
757
758 ngx_str_t *value;
759
760 if (ucf->expires != NGX_CONF_UNSET) {
761 return "is duplicate";
762 }
763
764 value = cf->args->elts;
765
766 if (ngx_strcmp(value[1].data, "max") == 0) {
767 ucf->expires = NGX_HTTP_USERID_MAX_EXPIRES;
768 return NGX_CONF_OK;
769 }
770
771 if (ngx_strcmp(value[1].data, "off") == 0) {
772 ucf->expires = 0;
773 return NGX_CONF_OK;
774 }
775
776 ucf->expires = ngx_parse_time(&value[1], 1);
777 if (ucf->expires == (time_t) NGX_ERROR) {
778 return "invalid value";
779 }
780
781 return NGX_CONF_OK;
782 }
783
784
785 static char *
786 ngx_http_userid_p3p(ngx_conf_t *cf, void *post, void *data)
787 {
788 ngx_str_t *p3p = data;
789
790 if (ngx_strcmp(p3p->data, "none") == 0) {
791 ngx_str_set(p3p, "");
792 }
793
794 return NGX_CONF_OK;
795 }
796
797
798 static char *
799 ngx_http_userid_mark(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
800 {
801 ngx_http_userid_conf_t *ucf = conf;
802
803 ngx_str_t *value;
804
805 if (ucf->mark != (u_char) '\xFF') {
806 return "is duplicate";
807 }
808
809 value = cf->args->elts;
810
811 if (ngx_strcmp(value[1].data, "off") == 0) {
812 ucf->mark = '\0';
813 return NGX_CONF_OK;
814 }
815
816 if (value[1].len != 1
817 || !((value[1].data[0] >= '' && value[1].data[0] <= '9')
818 || (value[1].data[0] >= 'A' && value[1].data[0] <= 'Z')
819 || (value[1].data[0] >= 'a' && value[1].data[0] <= 'z')
820 || value[1].data[0] == '='))
821 {
822 return "value must be \"off\" or a single letter, digit or \"=\"";
823 }
824
825 ucf->mark = value[1].data[0];
826
827 return NGX_CONF_OK;
828 }
829
830
831 static ngx_int_t
832 ngx_http_userid_init_worker(ngx_cycle_t *cycle)
833 {
834 struct timeval tp;
835
836 ngx_gettimeofday(&tp);
837
838 /* use the most significant usec part that fits to 16 bits */
839 start_value = ((tp.tv_usec / 20) << 16) | ngx_pid;
840
841 return NGX_OK;
842 }
843
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