1 /*
2 * ACL management functions.
3 *
4 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
13 #include <ctype.h>
14 #include <stdio.h>
15 #include <string.h>
16
17 #include <import/ebsttree.h>
18
19 #include <haproxy/acl.h>
20 #include <haproxy/api.h>
21 #include <haproxy/arg.h>
22 #include <haproxy/auth.h>
23 #include <haproxy/errors.h>
24 #include <haproxy/global.h>
25 #include <haproxy/list.h>
26 #include <haproxy/pattern.h>
27 #include <haproxy/proxy-t.h>
28 #include <haproxy/sample.h>
29 #include <haproxy/stick_table.h>
30 #include <haproxy/tools.h>
31
32 /* List head of all known ACL keywords */
33 static struct acl_kw_list acl_keywords = {
34 .list = LIST_HEAD_INIT(acl_keywords.list)
35 };
36
37 /* input values are 0 or 3, output is the same */
pat2acl(struct pattern * pat)38 static inline enum acl_test_res pat2acl(struct pattern *pat)
39 {
40 if (pat)
41 return ACL_TEST_PASS;
42 else
43 return ACL_TEST_FAIL;
44 }
45
46 /*
47 * Registers the ACL keyword list <kwl> as a list of valid keywords for next
48 * parsing sessions.
49 */
acl_register_keywords(struct acl_kw_list * kwl)50 void acl_register_keywords(struct acl_kw_list *kwl)
51 {
52 LIST_APPEND(&acl_keywords.list, &kwl->list);
53 }
54
55 /*
56 * Unregisters the ACL keyword list <kwl> from the list of valid keywords.
57 */
acl_unregister_keywords(struct acl_kw_list * kwl)58 void acl_unregister_keywords(struct acl_kw_list *kwl)
59 {
60 LIST_DELETE(&kwl->list);
61 LIST_INIT(&kwl->list);
62 }
63
64 /* Return a pointer to the ACL <name> within the list starting at <head>, or
65 * NULL if not found.
66 */
find_acl_by_name(const char * name,struct list * head)67 struct acl *find_acl_by_name(const char *name, struct list *head)
68 {
69 struct acl *acl;
70 list_for_each_entry(acl, head, list) {
71 if (strcmp(acl->name, name) == 0)
72 return acl;
73 }
74 return NULL;
75 }
76
77 /* Return a pointer to the ACL keyword <kw>, or NULL if not found. Note that if
78 * <kw> contains an opening parenthesis or a comma, only the left part of it is
79 * checked.
80 */
find_acl_kw(const char * kw)81 struct acl_keyword *find_acl_kw(const char *kw)
82 {
83 int index;
84 const char *kwend;
85 struct acl_kw_list *kwl;
86
87 kwend = kw;
88 while (is_idchar(*kwend))
89 kwend++;
90
91 list_for_each_entry(kwl, &acl_keywords.list, list) {
92 for (index = 0; kwl->kw[index].kw != NULL; index++) {
93 if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
94 kwl->kw[index].kw[kwend-kw] == 0)
95 return &kwl->kw[index];
96 }
97 }
98 return NULL;
99 }
100
prune_acl_expr(struct acl_expr * expr)101 static struct acl_expr *prune_acl_expr(struct acl_expr *expr)
102 {
103 struct arg *arg;
104 int unresolved = 0;
105
106 pattern_prune(&expr->pat);
107
108 for (arg = expr->smp->arg_p; arg; arg++) {
109 if (arg->type == ARGT_STOP)
110 break;
111 if (arg->type == ARGT_STR || arg->unresolved) {
112 chunk_destroy(&arg->data.str);
113 unresolved |= arg->unresolved;
114 arg->unresolved = 0;
115 }
116 }
117
118 release_sample_expr(expr->smp);
119
120 return expr;
121 }
122
123 /* Parse an ACL expression starting at <args>[0], and return it. If <err> is
124 * not NULL, it will be filled with a pointer to an error message in case of
125 * error. This pointer must be freeable or NULL. <al> is an arg_list serving
126 * as a list head to report missing dependencies. It may be NULL if such
127 * dependencies are not allowed.
128 *
129 * Right now, the only accepted syntax is :
130 * <subject> [<value>...]
131 */
parse_acl_expr(const char ** args,char ** err,struct arg_list * al,const char * file,int line)132 struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al,
133 const char *file, int line)
134 {
135 __label__ out_return, out_free_expr;
136 struct acl_expr *expr;
137 struct acl_keyword *aclkw;
138 int refflags, patflags;
139 const char *arg;
140 struct sample_expr *smp = NULL;
141 int idx = 0;
142 char *ckw = NULL;
143 const char *begw;
144 const char *endw;
145 const char *endt;
146 int cur_type;
147 int nbargs;
148 int operator = STD_OP_EQ;
149 int op;
150 int contain_colon, have_dot;
151 const char *dot;
152 signed long long value, minor;
153 /* The following buffer contain two numbers, a ':' separator and the final \0. */
154 char buffer[NB_LLMAX_STR + 1 + NB_LLMAX_STR + 1];
155 int is_loaded;
156 int unique_id;
157 char *error;
158 struct pat_ref *ref;
159 struct pattern_expr *pattern_expr;
160 int load_as_map = 0;
161 int acl_conv_found = 0;
162
163 /* First, we look for an ACL keyword. And if we don't find one, then
164 * we look for a sample fetch expression starting with a sample fetch
165 * keyword.
166 */
167
168 if (al) {
169 al->ctx = ARGC_ACL; // to report errors while resolving args late
170 al->kw = *args;
171 al->conv = NULL;
172 }
173
174 aclkw = find_acl_kw(args[0]);
175 if (aclkw) {
176 /* OK we have a real ACL keyword */
177
178 /* build new sample expression for this ACL */
179 smp = calloc(1, sizeof(*smp));
180 if (!smp) {
181 memprintf(err, "out of memory when parsing ACL expression");
182 goto out_return;
183 }
184 LIST_INIT(&(smp->conv_exprs));
185 smp->fetch = aclkw->smp;
186 smp->arg_p = empty_arg_list;
187
188 /* look for the beginning of the subject arguments */
189 for (arg = args[0]; is_idchar(*arg); arg++)
190 ;
191
192 /* At this point, we have :
193 * - args[0] : beginning of the keyword
194 * - arg : end of the keyword, first character not part of keyword
195 */
196 nbargs = make_arg_list(arg, -1, smp->fetch->arg_mask, &smp->arg_p,
197 err, &endt, NULL, al);
198 if (nbargs < 0) {
199 /* note that make_arg_list will have set <err> here */
200 memprintf(err, "ACL keyword '%s' : %s", aclkw->kw, *err);
201 goto out_free_smp;
202 }
203
204 if (!smp->arg_p) {
205 smp->arg_p = empty_arg_list;
206 }
207 else if (smp->fetch->val_args && !smp->fetch->val_args(smp->arg_p, err)) {
208 /* invalid keyword argument, error must have been
209 * set by val_args().
210 */
211 memprintf(err, "in argument to '%s', %s", aclkw->kw, *err);
212 goto out_free_smp;
213 }
214 arg = endt;
215
216 /* look for the beginning of the converters list. Those directly attached
217 * to the ACL keyword are found just after <arg> which points to the comma.
218 * If we find any converter, then we don't use the ACL keyword's match
219 * anymore but the one related to the converter's output type.
220 */
221 cur_type = smp->fetch->out_type;
222 while (*arg) {
223 struct sample_conv *conv;
224 struct sample_conv_expr *conv_expr;
225 int err_arg;
226 int argcnt;
227
228 if (*arg && *arg != ',') {
229 if (ckw)
230 memprintf(err, "ACL keyword '%s' : missing comma after converter '%s'.",
231 aclkw->kw, ckw);
232 else
233 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
234 aclkw->kw);
235 goto out_free_smp;
236 }
237
238 /* FIXME: how long should we support such idiocies ? Maybe we
239 * should already warn ?
240 */
241 while (*arg == ',') /* then trailing commas */
242 arg++;
243
244 begw = arg; /* start of converter keyword */
245
246 if (!*begw)
247 /* none ? end of converters */
248 break;
249
250 for (endw = begw; is_idchar(*endw); endw++)
251 ;
252
253 free(ckw);
254 ckw = my_strndup(begw, endw - begw);
255
256 conv = find_sample_conv(begw, endw - begw);
257 if (!conv) {
258 /* Unknown converter method */
259 memprintf(err, "ACL keyword '%s' : unknown converter '%s'.",
260 aclkw->kw, ckw);
261 goto out_free_smp;
262 }
263
264 arg = endw;
265
266 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
267 memprintf(err, "ACL keyword '%s' : returns type of converter '%s' is unknown.",
268 aclkw->kw, ckw);
269 goto out_free_smp;
270 }
271
272 /* If impossible type conversion */
273 if (!sample_casts[cur_type][conv->in_type]) {
274 memprintf(err, "ACL keyword '%s' : converter '%s' cannot be applied.",
275 aclkw->kw, ckw);
276 goto out_free_smp;
277 }
278
279 cur_type = conv->out_type;
280 conv_expr = calloc(1, sizeof(*conv_expr));
281 if (!conv_expr)
282 goto out_free_smp;
283
284 LIST_APPEND(&(smp->conv_exprs), &(conv_expr->list));
285 conv_expr->conv = conv;
286 acl_conv_found = 1;
287
288 if (al) {
289 al->kw = smp->fetch->kw;
290 al->conv = conv_expr->conv->kw;
291 }
292 argcnt = make_arg_list(endw, -1, conv->arg_mask, &conv_expr->arg_p, err, &arg, &err_arg, al);
293 if (argcnt < 0) {
294 memprintf(err, "ACL keyword '%s' : invalid arg %d in converter '%s' : %s.",
295 aclkw->kw, err_arg+1, ckw, *err);
296 goto out_free_smp;
297 }
298
299 if (argcnt && !conv->arg_mask) {
300 memprintf(err, "converter '%s' does not support any args", ckw);
301 goto out_free_smp;
302 }
303
304 if (!conv_expr->arg_p)
305 conv_expr->arg_p = empty_arg_list;
306
307 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, file, line, err)) {
308 memprintf(err, "ACL keyword '%s' : invalid args in converter '%s' : %s.",
309 aclkw->kw, ckw, *err);
310 goto out_free_smp;
311 }
312 }
313 ha_free(&ckw);
314 }
315 else {
316 /* This is not an ACL keyword, so we hope this is a sample fetch
317 * keyword that we're going to transparently use as an ACL. If
318 * so, we retrieve a completely parsed expression with args and
319 * convs already done.
320 */
321 smp = sample_parse_expr((char **)args, &idx, file, line, err, al, NULL);
322 if (!smp) {
323 memprintf(err, "%s in ACL expression '%s'", *err, *args);
324 goto out_return;
325 }
326 cur_type = smp_expr_output_type(smp);
327 }
328
329 expr = calloc(1, sizeof(*expr));
330 if (!expr) {
331 memprintf(err, "out of memory when parsing ACL expression");
332 goto out_free_smp;
333 }
334
335 pattern_init_head(&expr->pat);
336
337 expr->pat.expect_type = cur_type;
338 expr->smp = smp;
339 expr->kw = smp->fetch->kw;
340 smp = NULL; /* don't free it anymore */
341
342 if (aclkw && !acl_conv_found) {
343 expr->kw = aclkw->kw;
344 expr->pat.parse = aclkw->parse ? aclkw->parse : pat_parse_fcts[aclkw->match_type];
345 expr->pat.index = aclkw->index ? aclkw->index : pat_index_fcts[aclkw->match_type];
346 expr->pat.match = aclkw->match ? aclkw->match : pat_match_fcts[aclkw->match_type];
347 expr->pat.prune = aclkw->prune ? aclkw->prune : pat_prune_fcts[aclkw->match_type];
348 }
349
350 if (!expr->pat.parse) {
351 /* Parse/index/match functions depend on the expression type,
352 * so we have to map them now. Some types can be automatically
353 * converted.
354 */
355 switch (cur_type) {
356 case SMP_T_BOOL:
357 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
358 expr->pat.index = pat_index_fcts[PAT_MATCH_BOOL];
359 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
360 expr->pat.prune = pat_prune_fcts[PAT_MATCH_BOOL];
361 expr->pat.expect_type = pat_match_types[PAT_MATCH_BOOL];
362 break;
363 case SMP_T_SINT:
364 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
365 expr->pat.index = pat_index_fcts[PAT_MATCH_INT];
366 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
367 expr->pat.prune = pat_prune_fcts[PAT_MATCH_INT];
368 expr->pat.expect_type = pat_match_types[PAT_MATCH_INT];
369 break;
370 case SMP_T_ADDR:
371 case SMP_T_IPV4:
372 case SMP_T_IPV6:
373 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
374 expr->pat.index = pat_index_fcts[PAT_MATCH_IP];
375 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
376 expr->pat.prune = pat_prune_fcts[PAT_MATCH_IP];
377 expr->pat.expect_type = pat_match_types[PAT_MATCH_IP];
378 break;
379 case SMP_T_STR:
380 expr->pat.parse = pat_parse_fcts[PAT_MATCH_STR];
381 expr->pat.index = pat_index_fcts[PAT_MATCH_STR];
382 expr->pat.match = pat_match_fcts[PAT_MATCH_STR];
383 expr->pat.prune = pat_prune_fcts[PAT_MATCH_STR];
384 expr->pat.expect_type = pat_match_types[PAT_MATCH_STR];
385 break;
386 }
387 }
388
389 /* Additional check to protect against common mistakes */
390 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
391 ha_warning("parsing acl keyword '%s' :\n"
392 " no pattern to match against were provided, so this ACL will never match.\n"
393 " If this is what you intended, please add '--' to get rid of this warning.\n"
394 " If you intended to match only for existence, please use '-m found'.\n"
395 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
396 "\n",
397 args[0]);
398 }
399
400 args++;
401
402 /* check for options before patterns. Supported options are :
403 * -i : ignore case for all patterns by default
404 * -f : read patterns from those files
405 * -m : force matching method (must be used before -f)
406 * -M : load the file as map file
407 * -u : force the unique id of the acl
408 * -- : everything after this is not an option
409 */
410 refflags = PAT_REF_ACL;
411 patflags = 0;
412 is_loaded = 0;
413 unique_id = -1;
414 while (**args == '-') {
415 if (strcmp(*args, "-i") == 0)
416 patflags |= PAT_MF_IGNORE_CASE;
417 else if (strcmp(*args, "-n") == 0)
418 patflags |= PAT_MF_NO_DNS;
419 else if (strcmp(*args, "-u") == 0) {
420 unique_id = strtol(args[1], &error, 10);
421 if (*error != '\0') {
422 memprintf(err, "the argument of -u must be an integer");
423 goto out_free_expr;
424 }
425
426 /* Check if this id is really unique. */
427 if (pat_ref_lookupid(unique_id)) {
428 memprintf(err, "the id is already used");
429 goto out_free_expr;
430 }
431
432 args++;
433 }
434 else if (strcmp(*args, "-f") == 0) {
435 if (!expr->pat.parse) {
436 memprintf(err, "matching method must be specified first (using '-m') when using a sample fetch of this type ('%s')", expr->kw);
437 goto out_free_expr;
438 }
439
440 if (!pattern_read_from_file(&expr->pat, refflags, args[1], patflags, load_as_map, err, file, line))
441 goto out_free_expr;
442 is_loaded = 1;
443 args++;
444 }
445 else if (strcmp(*args, "-m") == 0) {
446 int idx;
447
448 if (is_loaded) {
449 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
450 goto out_free_expr;
451 }
452
453 idx = pat_find_match_name(args[1]);
454 if (idx < 0) {
455 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
456 goto out_free_expr;
457 }
458
459 /* Note: -m found is always valid, bool/int are compatible, str/bin/reg/len are compatible */
460 if (idx != PAT_MATCH_FOUND && !sample_casts[cur_type][pat_match_types[idx]]) {
461 memprintf(err, "matching method '%s' cannot be used with fetch keyword '%s'", args[1], expr->kw);
462 goto out_free_expr;
463 }
464 expr->pat.parse = pat_parse_fcts[idx];
465 expr->pat.index = pat_index_fcts[idx];
466 expr->pat.match = pat_match_fcts[idx];
467 expr->pat.prune = pat_prune_fcts[idx];
468 expr->pat.expect_type = pat_match_types[idx];
469 args++;
470 }
471 else if (strcmp(*args, "-M") == 0) {
472 refflags |= PAT_REF_MAP;
473 load_as_map = 1;
474 }
475 else if (strcmp(*args, "--") == 0) {
476 args++;
477 break;
478 }
479 else {
480 memprintf(err, "'%s' is not a valid ACL option. Please use '--' before any pattern beginning with a '-'", args[0]);
481 goto out_free_expr;
482 break;
483 }
484 args++;
485 }
486
487 if (!expr->pat.parse) {
488 memprintf(err, "matching method must be specified first (using '-m') when using a sample fetch of this type ('%s')", expr->kw);
489 goto out_free_expr;
490 }
491
492 /* Create displayed reference */
493 snprintf(trash.area, trash.size, "acl '%s' file '%s' line %d",
494 expr->kw, file, line);
495 trash.area[trash.size - 1] = '\0';
496
497 /* Create new pattern reference. */
498 ref = pat_ref_newid(unique_id, trash.area, PAT_REF_ACL);
499 if (!ref) {
500 memprintf(err, "memory error");
501 goto out_free_expr;
502 }
503
504 /* Create new pattern expression associated to this reference. */
505 pattern_expr = pattern_new_expr(&expr->pat, ref, patflags, err, NULL);
506 if (!pattern_expr)
507 goto out_free_expr;
508
509 /* now parse all patterns */
510 while (**args) {
511 arg = *args;
512
513 /* Compatibility layer. Each pattern can parse only one string per pattern,
514 * but the pat_parser_int() and pat_parse_dotted_ver() parsers were need
515 * optionally two operators. The first operator is the match method: eq,
516 * le, lt, ge and gt. pat_parse_int() and pat_parse_dotted_ver() functions
517 * can have a compatibility syntax based on ranges:
518 *
519 * pat_parse_int():
520 *
521 * "eq x" -> "x" or "x:x"
522 * "le x" -> ":x"
523 * "lt x" -> ":y" (with y = x - 1)
524 * "ge x" -> "x:"
525 * "gt x" -> "y:" (with y = x + 1)
526 *
527 * pat_parse_dotted_ver():
528 *
529 * "eq x.y" -> "x.y" or "x.y:x.y"
530 * "le x.y" -> ":x.y"
531 * "lt x.y" -> ":w.z" (with w.z = x.y - 1)
532 * "ge x.y" -> "x.y:"
533 * "gt x.y" -> "w.z:" (with w.z = x.y + 1)
534 *
535 * If y is not present, assume that is "0".
536 *
537 * The syntax eq, le, lt, ge and gt are proper to the acl syntax. The
538 * following block of code detect the operator, and rewrite each value
539 * in parsable string.
540 */
541 if (expr->pat.parse == pat_parse_int ||
542 expr->pat.parse == pat_parse_dotted_ver) {
543 /* Check for operator. If the argument is operator, memorise it and
544 * continue to the next argument.
545 */
546 op = get_std_op(arg);
547 if (op != -1) {
548 operator = op;
549 args++;
550 continue;
551 }
552
553 /* Check if the pattern contain ':' or '-' character. */
554 contain_colon = (strchr(arg, ':') || strchr(arg, '-'));
555
556 /* If the pattern contain ':' or '-' character, give it to the parser as is.
557 * If no contain ':' and operator is STD_OP_EQ, give it to the parser as is.
558 * In other case, try to convert the value according with the operator.
559 */
560 if (!contain_colon && operator != STD_OP_EQ) {
561 /* Search '.' separator. */
562 dot = strchr(arg, '.');
563 if (!dot) {
564 have_dot = 0;
565 minor = 0;
566 dot = arg + strlen(arg);
567 }
568 else
569 have_dot = 1;
570
571 /* convert the integer minor part for the pat_parse_dotted_ver() function. */
572 if (expr->pat.parse == pat_parse_dotted_ver && have_dot) {
573 if (strl2llrc(dot+1, strlen(dot+1), &minor) != 0) {
574 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
575 goto out_free_expr;
576 }
577 if (minor >= 65536) {
578 memprintf(err, "'%s' contains too large a minor value", arg);
579 goto out_free_expr;
580 }
581 }
582
583 /* convert the integer value for the pat_parse_int() function, and the
584 * integer major part for the pat_parse_dotted_ver() function.
585 */
586 if (strl2llrc(arg, dot - arg, &value) != 0) {
587 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
588 goto out_free_expr;
589 }
590 if (expr->pat.parse == pat_parse_dotted_ver) {
591 if (value >= 65536) {
592 memprintf(err, "'%s' contains too large a major value", arg);
593 goto out_free_expr;
594 }
595 value = (value << 16) | (minor & 0xffff);
596 }
597
598 switch (operator) {
599
600 case STD_OP_EQ: /* this case is not possible. */
601 memprintf(err, "internal error");
602 goto out_free_expr;
603
604 case STD_OP_GT:
605 value++; /* gt = ge + 1 */
606 /* fall through */
607
608 case STD_OP_GE:
609 if (expr->pat.parse == pat_parse_int)
610 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld:", value);
611 else
612 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld.%lld:",
613 value >> 16, value & 0xffff);
614 arg = buffer;
615 break;
616
617 case STD_OP_LT:
618 value--; /* lt = le - 1 */
619 /* fall through */
620
621 case STD_OP_LE:
622 if (expr->pat.parse == pat_parse_int)
623 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld", value);
624 else
625 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld.%lld",
626 value >> 16, value & 0xffff);
627 arg = buffer;
628 break;
629 }
630 }
631 }
632
633 /* Add sample to the reference, and try to compile it fior each pattern
634 * using this value.
635 */
636 if (!pat_ref_add(ref, arg, NULL, err))
637 goto out_free_expr;
638 args++;
639 }
640
641 return expr;
642
643 out_free_expr:
644 prune_acl_expr(expr);
645 free(expr);
646 out_free_smp:
647 free(ckw);
648 free(smp);
649 out_return:
650 return NULL;
651 }
652
653 /* Purge everything in the acl <acl>, then return <acl>. */
prune_acl(struct acl * acl)654 struct acl *prune_acl(struct acl *acl) {
655
656 struct acl_expr *expr, *exprb;
657
658 free(acl->name);
659
660 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
661 LIST_DELETE(&expr->list);
662 prune_acl_expr(expr);
663 free(expr);
664 }
665
666 return acl;
667 }
668
669 /* Parse an ACL with the name starting at <args>[0], and with a list of already
670 * known ACLs in <acl>. If the ACL was not in the list, it will be added.
671 * A pointer to that ACL is returned. If the ACL has an empty name, then it's
672 * an anonymous one and it won't be merged with any other one. If <err> is not
673 * NULL, it will be filled with an appropriate error. This pointer must be
674 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
675 * dependencies. It may be NULL if such dependencies are not allowed.
676 *
677 * args syntax: <aclname> <acl_expr>
678 */
parse_acl(const char ** args,struct list * known_acl,char ** err,struct arg_list * al,const char * file,int line)679 struct acl *parse_acl(const char **args, struct list *known_acl, char **err, struct arg_list *al,
680 const char *file, int line)
681 {
682 __label__ out_return, out_free_acl_expr, out_free_name;
683 struct acl *cur_acl;
684 struct acl_expr *acl_expr;
685 char *name;
686 const char *pos;
687
688 if (**args && (pos = invalid_char(*args))) {
689 memprintf(err, "invalid character in ACL name : '%c'", *pos);
690 goto out_return;
691 }
692
693 acl_expr = parse_acl_expr(args + 1, err, al, file, line);
694 if (!acl_expr) {
695 /* parse_acl_expr will have filled <err> here */
696 goto out_return;
697 }
698
699 /* Check for args beginning with an opening parenthesis just after the
700 * subject, as this is almost certainly a typo. Right now we can only
701 * emit a warning, so let's do so.
702 */
703 if (!strchr(args[1], '(') && *args[2] == '(')
704 ha_warning("parsing acl '%s' :\n"
705 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
706 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
707 " If you are really sure this is not an error, please insert '--' between the\n"
708 " match and the pattern to make this warning message disappear.\n",
709 args[0], args[1], args[2]);
710
711 if (*args[0])
712 cur_acl = find_acl_by_name(args[0], known_acl);
713 else
714 cur_acl = NULL;
715
716 if (!cur_acl) {
717 name = strdup(args[0]);
718 if (!name) {
719 memprintf(err, "out of memory when parsing ACL");
720 goto out_free_acl_expr;
721 }
722 cur_acl = calloc(1, sizeof(*cur_acl));
723 if (cur_acl == NULL) {
724 memprintf(err, "out of memory when parsing ACL");
725 goto out_free_name;
726 }
727
728 LIST_INIT(&cur_acl->expr);
729 LIST_APPEND(known_acl, &cur_acl->list);
730 cur_acl->name = name;
731 }
732
733 /* We want to know what features the ACL needs (typically HTTP parsing),
734 * and where it may be used. If an ACL relies on multiple matches, it is
735 * OK if at least one of them may match in the context where it is used.
736 */
737 cur_acl->use |= acl_expr->smp->fetch->use;
738 cur_acl->val |= acl_expr->smp->fetch->val;
739 LIST_APPEND(&cur_acl->expr, &acl_expr->list);
740 return cur_acl;
741
742 out_free_name:
743 free(name);
744 out_free_acl_expr:
745 prune_acl_expr(acl_expr);
746 free(acl_expr);
747 out_return:
748 return NULL;
749 }
750
751 /* Some useful ACLs provided by default. Only those used are allocated. */
752
753 const struct {
754 const char *name;
755 const char *expr[4]; /* put enough for longest expression */
756 } default_acl_list[] = {
757 { .name = "TRUE", .expr = {"always_true",""}},
758 { .name = "FALSE", .expr = {"always_false",""}},
759 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
760 { .name = "HTTP", .expr = {"req.proto_http",""}},
761 { .name = "HTTP_1.0", .expr = {"req.ver","1.0",""}},
762 { .name = "HTTP_1.1", .expr = {"req.ver","1.1",""}},
763 { .name = "HTTP_2.0", .expr = {"req.ver","2.0",""}},
764 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
765 { .name = "METH_DELETE", .expr = {"method","DELETE",""}},
766 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
767 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
768 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
769 { .name = "METH_POST", .expr = {"method","POST",""}},
770 { .name = "METH_PUT", .expr = {"method","PUT",""}},
771 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
772 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
773 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
774 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
775 { .name = "HTTP_CONTENT", .expr = {"req.hdr_val(content-length)","gt","0",""}},
776 { .name = "RDP_COOKIE", .expr = {"req.rdp_cookie_cnt","gt","0",""}},
777 { .name = "REQ_CONTENT", .expr = {"req.len","gt","0",""}},
778 { .name = "WAIT_END", .expr = {"wait_end",""}},
779 { .name = NULL, .expr = {""}}
780 };
781
782 /* Find a default ACL from the default_acl list, compile it and return it.
783 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
784 * except when default ACLs are broken, in which case it will return NULL.
785 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
786 * not NULL, it will be filled with an error message if an error occurs. This
787 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
788 * to report missing dependencies. It may be NULL if such dependencies are not
789 * allowed.
790 */
find_acl_default(const char * acl_name,struct list * known_acl,char ** err,struct arg_list * al,const char * file,int line)791 static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
792 char **err, struct arg_list *al,
793 const char *file, int line)
794 {
795 __label__ out_return, out_free_acl_expr, out_free_name;
796 struct acl *cur_acl;
797 struct acl_expr *acl_expr;
798 char *name;
799 int index;
800
801 for (index = 0; default_acl_list[index].name != NULL; index++) {
802 if (strcmp(acl_name, default_acl_list[index].name) == 0)
803 break;
804 }
805
806 if (default_acl_list[index].name == NULL) {
807 memprintf(err, "no such ACL : '%s'", acl_name);
808 return NULL;
809 }
810
811 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al, file, line);
812 if (!acl_expr) {
813 /* parse_acl_expr must have filled err here */
814 goto out_return;
815 }
816
817 name = strdup(acl_name);
818 if (!name) {
819 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
820 goto out_free_acl_expr;
821 }
822
823 cur_acl = calloc(1, sizeof(*cur_acl));
824 if (cur_acl == NULL) {
825 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
826 goto out_free_name;
827 }
828
829 cur_acl->name = name;
830 cur_acl->use |= acl_expr->smp->fetch->use;
831 cur_acl->val |= acl_expr->smp->fetch->val;
832 LIST_INIT(&cur_acl->expr);
833 LIST_APPEND(&cur_acl->expr, &acl_expr->list);
834 if (known_acl)
835 LIST_APPEND(known_acl, &cur_acl->list);
836
837 return cur_acl;
838
839 out_free_name:
840 free(name);
841 out_free_acl_expr:
842 prune_acl_expr(acl_expr);
843 free(acl_expr);
844 out_return:
845 return NULL;
846 }
847
848 /* Purge everything in the acl_cond <cond>, then return <cond>. */
prune_acl_cond(struct acl_cond * cond)849 struct acl_cond *prune_acl_cond(struct acl_cond *cond)
850 {
851 struct acl_term_suite *suite, *tmp_suite;
852 struct acl_term *term, *tmp_term;
853
854 /* iterate through all term suites and free all terms and all suites */
855 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
856 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
857 free(term);
858 free(suite);
859 }
860 return cond;
861 }
862
863 /* Parse an ACL condition starting at <args>[0], relying on a list of already
864 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
865 * case of low memory). Supports multiple conditions separated by "or". If
866 * <err> is not NULL, it will be filled with a pointer to an error message in
867 * case of error, that the caller is responsible for freeing. The initial
868 * location must either be freeable or NULL. The list <al> serves as a list head
869 * for unresolved dependencies. It may be NULL if such dependencies are not
870 * allowed.
871 */
parse_acl_cond(const char ** args,struct list * known_acl,enum acl_cond_pol pol,char ** err,struct arg_list * al,const char * file,int line)872 struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
873 enum acl_cond_pol pol, char **err, struct arg_list *al,
874 const char *file, int line)
875 {
876 __label__ out_return, out_free_suite, out_free_term;
877 int arg, neg;
878 const char *word;
879 struct acl *cur_acl;
880 struct acl_term *cur_term;
881 struct acl_term_suite *cur_suite;
882 struct acl_cond *cond;
883 unsigned int suite_val;
884
885 cond = calloc(1, sizeof(*cond));
886 if (cond == NULL) {
887 memprintf(err, "out of memory when parsing condition");
888 goto out_return;
889 }
890
891 LIST_INIT(&cond->list);
892 LIST_INIT(&cond->suites);
893 cond->pol = pol;
894 cond->val = 0;
895
896 cur_suite = NULL;
897 suite_val = ~0U;
898 neg = 0;
899 for (arg = 0; *args[arg]; arg++) {
900 word = args[arg];
901
902 /* remove as many exclamation marks as we can */
903 while (*word == '!') {
904 neg = !neg;
905 word++;
906 }
907
908 /* an empty word is allowed because we cannot force the user to
909 * always think about not leaving exclamation marks alone.
910 */
911 if (!*word)
912 continue;
913
914 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
915 /* new term suite */
916 cond->val |= suite_val;
917 suite_val = ~0U;
918 cur_suite = NULL;
919 neg = 0;
920 continue;
921 }
922
923 if (strcmp(word, "{") == 0) {
924 /* we may have a complete ACL expression between two braces,
925 * find the last one.
926 */
927 int arg_end = arg + 1;
928 const char **args_new;
929
930 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
931 arg_end++;
932
933 if (!*args[arg_end]) {
934 memprintf(err, "missing closing '}' in condition");
935 goto out_free_suite;
936 }
937
938 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
939 if (!args_new) {
940 memprintf(err, "out of memory when parsing condition");
941 goto out_free_suite;
942 }
943
944 args_new[0] = "";
945 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
946 args_new[arg_end - arg] = "";
947 cur_acl = parse_acl(args_new, known_acl, err, al, file, line);
948 free(args_new);
949
950 if (!cur_acl) {
951 /* note that parse_acl() must have filled <err> here */
952 goto out_free_suite;
953 }
954 arg = arg_end;
955 }
956 else {
957 /* search for <word> in the known ACL names. If we do not find
958 * it, let's look for it in the default ACLs, and if found, add
959 * it to the list of ACLs of this proxy. This makes it possible
960 * to override them.
961 */
962 cur_acl = find_acl_by_name(word, known_acl);
963 if (cur_acl == NULL) {
964 cur_acl = find_acl_default(word, known_acl, err, al, file, line);
965 if (cur_acl == NULL) {
966 /* note that find_acl_default() must have filled <err> here */
967 goto out_free_suite;
968 }
969 }
970 }
971
972 cur_term = calloc(1, sizeof(*cur_term));
973 if (cur_term == NULL) {
974 memprintf(err, "out of memory when parsing condition");
975 goto out_free_suite;
976 }
977
978 cur_term->acl = cur_acl;
979 cur_term->neg = neg;
980
981 /* Here it is a bit complex. The acl_term_suite is a conjunction
982 * of many terms. It may only be used if all of its terms are
983 * usable at the same time. So the suite's validity domain is an
984 * AND between all ACL keywords' ones. But, the global condition
985 * is valid if at least one term suite is OK. So it's an OR between
986 * all of their validity domains. We could emit a warning as soon
987 * as suite_val is null because it means that the last ACL is not
988 * compatible with the previous ones. Let's remain simple for now.
989 */
990 cond->use |= cur_acl->use;
991 suite_val &= cur_acl->val;
992
993 if (!cur_suite) {
994 cur_suite = calloc(1, sizeof(*cur_suite));
995 if (cur_suite == NULL) {
996 memprintf(err, "out of memory when parsing condition");
997 goto out_free_term;
998 }
999 LIST_INIT(&cur_suite->terms);
1000 LIST_APPEND(&cond->suites, &cur_suite->list);
1001 }
1002 LIST_APPEND(&cur_suite->terms, &cur_term->list);
1003 neg = 0;
1004 }
1005
1006 cond->val |= suite_val;
1007 return cond;
1008
1009 out_free_term:
1010 free(cur_term);
1011 out_free_suite:
1012 prune_acl_cond(cond);
1013 free(cond);
1014 out_return:
1015 return NULL;
1016 }
1017
1018 /* Builds an ACL condition starting at the if/unless keyword. The complete
1019 * condition is returned. NULL is returned in case of error or if the first
1020 * word is neither "if" nor "unless". It automatically sets the file name and
1021 * the line number in the condition for better error reporting, and sets the
1022 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
1023 * be filled with a pointer to an error message in case of error, that the
1024 * caller is responsible for freeing. The initial location must either be
1025 * freeable or NULL.
1026 */
build_acl_cond(const char * file,int line,struct list * known_acl,struct proxy * px,const char ** args,char ** err)1027 struct acl_cond *build_acl_cond(const char *file, int line, struct list *known_acl,
1028 struct proxy *px, const char **args, char **err)
1029 {
1030 enum acl_cond_pol pol = ACL_COND_NONE;
1031 struct acl_cond *cond = NULL;
1032
1033 if (err)
1034 *err = NULL;
1035
1036 if (strcmp(*args, "if") == 0) {
1037 pol = ACL_COND_IF;
1038 args++;
1039 }
1040 else if (strcmp(*args, "unless") == 0) {
1041 pol = ACL_COND_UNLESS;
1042 args++;
1043 }
1044 else {
1045 memprintf(err, "conditions must start with either 'if' or 'unless'");
1046 return NULL;
1047 }
1048
1049 cond = parse_acl_cond(args, known_acl, pol, err, &px->conf.args, file, line);
1050 if (!cond) {
1051 /* note that parse_acl_cond must have filled <err> here */
1052 return NULL;
1053 }
1054
1055 cond->file = file;
1056 cond->line = line;
1057 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
1058 return cond;
1059 }
1060
1061 /* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
1062 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
1063 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
1064 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
1065 * function only computes the condition, it does not apply the polarity required
1066 * by IF/UNLESS, it's up to the caller to do this using something like this :
1067 *
1068 * res = acl_pass(res);
1069 * if (res == ACL_TEST_MISS)
1070 * return 0;
1071 * if (cond->pol == ACL_COND_UNLESS)
1072 * res = !res;
1073 */
acl_exec_cond(struct acl_cond * cond,struct proxy * px,struct session * sess,struct stream * strm,unsigned int opt)1074 enum acl_test_res acl_exec_cond(struct acl_cond *cond, struct proxy *px, struct session *sess, struct stream *strm, unsigned int opt)
1075 {
1076 __label__ fetch_next;
1077 struct acl_term_suite *suite;
1078 struct acl_term *term;
1079 struct acl_expr *expr;
1080 struct acl *acl;
1081 struct sample smp;
1082 enum acl_test_res acl_res, suite_res, cond_res;
1083
1084 /* ACLs are iterated over all values, so let's always set the flag to
1085 * indicate this to the fetch functions.
1086 */
1087 opt |= SMP_OPT_ITERATE;
1088
1089 /* We're doing a logical OR between conditions so we initialize to FAIL.
1090 * The MISS status is propagated down from the suites.
1091 */
1092 cond_res = ACL_TEST_FAIL;
1093 list_for_each_entry(suite, &cond->suites, list) {
1094 /* Evaluate condition suite <suite>. We stop at the first term
1095 * which returns ACL_TEST_FAIL. The MISS status is still propagated
1096 * in case of uncertainty in the result.
1097 */
1098
1099 /* we're doing a logical AND between terms, so we must set the
1100 * initial value to PASS.
1101 */
1102 suite_res = ACL_TEST_PASS;
1103 list_for_each_entry(term, &suite->terms, list) {
1104 acl = term->acl;
1105
1106 /* FIXME: use cache !
1107 * check acl->cache_idx for this.
1108 */
1109
1110 /* ACL result not cached. Let's scan all the expressions
1111 * and use the first one to match.
1112 */
1113 acl_res = ACL_TEST_FAIL;
1114 list_for_each_entry(expr, &acl->expr, list) {
1115 /* we need to reset context and flags */
1116 memset(&smp, 0, sizeof(smp));
1117 fetch_next:
1118 if (!sample_process(px, sess, strm, opt, expr->smp, &smp)) {
1119 /* maybe we could not fetch because of missing data */
1120 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
1121 acl_res |= ACL_TEST_MISS;
1122 continue;
1123 }
1124
1125 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, 0));
1126 /*
1127 * OK now acl_res holds the result of this expression
1128 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
1129 *
1130 * Then if (!MISS) we can cache the result, and put
1131 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
1132 *
1133 * FIXME: implement cache.
1134 *
1135 */
1136
1137 /* we're ORing these terms, so a single PASS is enough */
1138 if (acl_res == ACL_TEST_PASS)
1139 break;
1140
1141 if (smp.flags & SMP_F_NOT_LAST)
1142 goto fetch_next;
1143
1144 /* sometimes we know the fetched data is subject to change
1145 * later and give another chance for a new match (eg: request
1146 * size, time, ...)
1147 */
1148 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
1149 acl_res |= ACL_TEST_MISS;
1150 }
1151 /*
1152 * Here we have the result of an ACL (cached or not).
1153 * ACLs are combined, negated or not, to form conditions.
1154 */
1155
1156 if (term->neg)
1157 acl_res = acl_neg(acl_res);
1158
1159 suite_res &= acl_res;
1160
1161 /* we're ANDing these terms, so a single FAIL or MISS is enough */
1162 if (suite_res != ACL_TEST_PASS)
1163 break;
1164 }
1165 cond_res |= suite_res;
1166
1167 /* we're ORing these terms, so a single PASS is enough */
1168 if (cond_res == ACL_TEST_PASS)
1169 break;
1170 }
1171 return cond_res;
1172 }
1173
1174 /* Returns a pointer to the first ACL conflicting with usage at place <where>
1175 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
1176 * no conflict is found. Only full conflicts are detected (ACL is not usable).
1177 * Use the next function to check for useless keywords.
1178 */
acl_cond_conflicts(const struct acl_cond * cond,unsigned int where)1179 const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
1180 {
1181 struct acl_term_suite *suite;
1182 struct acl_term *term;
1183 struct acl *acl;
1184
1185 list_for_each_entry(suite, &cond->suites, list) {
1186 list_for_each_entry(term, &suite->terms, list) {
1187 acl = term->acl;
1188 if (!(acl->val & where))
1189 return acl;
1190 }
1191 }
1192 return NULL;
1193 }
1194
1195 /* Returns a pointer to the first ACL and its first keyword to conflict with
1196 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
1197 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
1198 * null), or false if not conflict is found. The first useless keyword is
1199 * returned.
1200 */
acl_cond_kw_conflicts(const struct acl_cond * cond,unsigned int where,struct acl const ** acl,char const ** kw)1201 int acl_cond_kw_conflicts(const struct acl_cond *cond, unsigned int where, struct acl const **acl, char const **kw)
1202 {
1203 struct acl_term_suite *suite;
1204 struct acl_term *term;
1205 struct acl_expr *expr;
1206
1207 list_for_each_entry(suite, &cond->suites, list) {
1208 list_for_each_entry(term, &suite->terms, list) {
1209 list_for_each_entry(expr, &term->acl->expr, list) {
1210 if (!(expr->smp->fetch->val & where)) {
1211 if (acl)
1212 *acl = term->acl;
1213 if (kw)
1214 *kw = expr->kw;
1215 return 1;
1216 }
1217 }
1218 }
1219 }
1220 return 0;
1221 }
1222
1223 /*
1224 * Find targets for userlist and groups in acl. Function returns the number
1225 * of errors or OK if everything is fine. It must be called only once sample
1226 * fetch arguments have been resolved (after smp_resolve_args()).
1227 */
acl_find_targets(struct proxy * p)1228 int acl_find_targets(struct proxy *p)
1229 {
1230
1231 struct acl *acl;
1232 struct acl_expr *expr;
1233 struct pattern_list *pattern;
1234 int cfgerr = 0;
1235 struct pattern_expr_list *pexp;
1236
1237 list_for_each_entry(acl, &p->acl, list) {
1238 list_for_each_entry(expr, &acl->expr, list) {
1239 if (strcmp(expr->kw, "http_auth_group") == 0) {
1240 /* Note: the ARGT_USR argument may only have been resolved earlier
1241 * by smp_resolve_args().
1242 */
1243 if (expr->smp->arg_p->unresolved) {
1244 ha_alert("Internal bug in proxy %s: %sacl %s %s() makes use of unresolved userlist '%s'. Please report this.\n",
1245 p->id, *acl->name ? "" : "anonymous ", acl->name, expr->kw,
1246 expr->smp->arg_p->data.str.area);
1247 cfgerr++;
1248 continue;
1249 }
1250
1251 if (LIST_ISEMPTY(&expr->pat.head)) {
1252 ha_alert("proxy %s: acl %s %s(): no groups specified.\n",
1253 p->id, acl->name, expr->kw);
1254 cfgerr++;
1255 continue;
1256 }
1257
1258 /* For each pattern, check if the group exists. */
1259 list_for_each_entry(pexp, &expr->pat.head, list) {
1260 if (LIST_ISEMPTY(&pexp->expr->patterns)) {
1261 ha_alert("proxy %s: acl %s %s(): no groups specified.\n",
1262 p->id, acl->name, expr->kw);
1263 cfgerr++;
1264 continue;
1265 }
1266
1267 list_for_each_entry(pattern, &pexp->expr->patterns, list) {
1268 /* this keyword only has one argument */
1269 if (!check_group(expr->smp->arg_p->data.usr, pattern->pat.ptr.str)) {
1270 ha_alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
1271 p->id, acl->name, expr->kw, pattern->pat.ptr.str);
1272 cfgerr++;
1273 }
1274 }
1275 }
1276 }
1277 }
1278 }
1279
1280 return cfgerr;
1281 }
1282
1283 /* initializes ACLs by resolving the sample fetch names they rely upon.
1284 * Returns 0 on success, otherwise an error.
1285 */
init_acl()1286 int init_acl()
1287 {
1288 int err = 0;
1289 int index;
1290 const char *name;
1291 struct acl_kw_list *kwl;
1292 struct sample_fetch *smp;
1293
1294 list_for_each_entry(kwl, &acl_keywords.list, list) {
1295 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1296 name = kwl->kw[index].fetch_kw;
1297 if (!name)
1298 name = kwl->kw[index].kw;
1299
1300 smp = find_sample_fetch(name, strlen(name));
1301 if (!smp) {
1302 ha_alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1303 kwl->kw[index].kw, name);
1304 err++;
1305 continue;
1306 }
1307 kwl->kw[index].smp = smp;
1308 }
1309 }
1310 return err;
1311 }
1312
free_acl_cond(struct acl_cond * cond)1313 void free_acl_cond(struct acl_cond *cond)
1314 {
1315 struct acl_term_suite *suite, *suiteb;
1316 struct acl_term *term, *termb;
1317
1318 if (!cond)
1319 return;
1320
1321 list_for_each_entry_safe(suite, suiteb, &cond->suites, list) {
1322 list_for_each_entry_safe(term, termb, &suite->terms, list) {
1323 LIST_DELETE(&term->list);
1324 free(term);
1325 }
1326 LIST_DELETE(&suite->list);
1327 free(suite);
1328 }
1329
1330 free(cond);
1331 }
1332
1333 /************************************************************************/
1334 /* All supported sample and ACL keywords must be declared here. */
1335 /************************************************************************/
1336
1337 /* Note: must not be declared <const> as its list will be overwritten.
1338 * Please take care of keeping this list alphabetically sorted.
1339 */
1340 static struct acl_kw_list acl_kws = {ILH, {
1341 { /* END */ },
1342 }};
1343
1344 INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
1345
1346 /*
1347 * Local variables:
1348 * c-indent-level: 8
1349 * c-basic-offset: 8
1350 * End:
1351 */
1352