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git01.mediatek.com / haproxy / 0cba607400ea8892265cd5f1700f39ec160fe0bb / . / src / acl.c
blob: 86a85971c3758853298b056b1ccec32b79580d3d [file] [log] [blame]
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1/*
2 * ACL management functions.
3 *
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]4 * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]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
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]13#include <ctype.h>
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]14#include <stdio.h>
15#include <string.h>
16
17#include <common/config.h>
18#include <common/mini-clist.h>
19#include <common/standard.h>
Krzysztof Piotr Oledzki8c8bd452010-01-29 19:29:32 +0100[diff] [blame]20#include <common/uri_auth.h>
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]21
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]22#include <types/global.h>
23
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]24#include <proto/acl.h>
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]25#include <proto/arg.h>
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]26#include <proto/auth.h>
Willy Tarreauc7e42382012-08-24 19:22:53 +0200[diff] [blame]27#include <proto/channel.h>
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]28#include <proto/log.h>
Thierry FOURNIERed66c292013-11-28 11:05:19 +0100[diff] [blame]29#include <proto/pattern.h>
Willy Tarreau0b1cd942010-05-16 22:18:27 +0200[diff] [blame]30#include <proto/proxy.h>
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]31#include <proto/sample.h>
Willy Tarreaud28c3532012-04-19 19:28:33 +0200[diff] [blame]32#include <proto/stick_table.h>
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]33
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]34#include <ebsttree.h>
35
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]36/* List head of all known ACL keywords */
37static struct acl_kw_list acl_keywords = {
38 .list = LIST_HEAD_INIT(acl_keywords.list)
39};
40
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]41/* return the PAT_MATCH_* index for match name "name", or < 0 if not found */
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]42static int acl_find_match_name(const char *name)
43{
44 int i;
45
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]46 for (i = 0; i < PAT_MATCH_NUM; i++)
47 if (strcmp(name, pat_match_names[i]) == 0)
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]48 return i;
49 return -1;
50}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]51
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame^]52/* input values are 0 or 3, output is the same */
53static inline enum acl_test_res pat2acl(enum pat_match_res res)
54{
55 return (enum acl_test_res)res;
56}
57
Willy Tarreaua5909832007-06-17 20:40:25 +0200[diff] [blame]58/*
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]59 * Registers the ACL keyword list <kwl> as a list of valid keywords for next
60 * parsing sessions.
61 */
62void acl_register_keywords(struct acl_kw_list *kwl)
63{
64 LIST_ADDQ(&acl_keywords.list, &kwl->list);
65}
66
67/*
68 * Unregisters the ACL keyword list <kwl> from the list of valid keywords.
69 */
70void acl_unregister_keywords(struct acl_kw_list *kwl)
71{
72 LIST_DEL(&kwl->list);
73 LIST_INIT(&kwl->list);
74}
75
76/* Return a pointer to the ACL <name> within the list starting at <head>, or
77 * NULL if not found.
78 */
79struct acl *find_acl_by_name(const char *name, struct list *head)
80{
81 struct acl *acl;
82 list_for_each_entry(acl, head, list) {
83 if (strcmp(acl->name, name) == 0)
84 return acl;
85 }
86 return NULL;
87}
88
89/* Return a pointer to the ACL keyword <kw>, or NULL if not found. Note that if
90 * <kw> contains an opening parenthesis, only the left part of it is checked.
91 */
92struct acl_keyword *find_acl_kw(const char *kw)
93{
94 int index;
95 const char *kwend;
96 struct acl_kw_list *kwl;
97
98 kwend = strchr(kw, '(');
99 if (!kwend)
100 kwend = kw + strlen(kw);
101
102 list_for_each_entry(kwl, &acl_keywords.list, list) {
103 for (index = 0; kwl->kw[index].kw != NULL; index++) {
104 if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
105 kwl->kw[index].kw[kwend-kw] == 0)
106 return &kwl->kw[index];
107 }
108 }
109 return NULL;
110}
111
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]112static struct acl_expr *prune_acl_expr(struct acl_expr *expr)
113{
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]114 struct arg *arg;
115
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]116 pattern_prune_expr(&expr->pat);
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]117
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]118 for (arg = expr->smp->arg_p; arg; arg++) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]119 if (arg->type == ARGT_STOP)
120 break;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]121 if (arg->type == ARGT_STR || arg->unresolved) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]122 free(arg->data.str.str);
123 arg->data.str.str = NULL;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]124 arg->unresolved = 0;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]125 }
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]126 }
127
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]128 if (expr->smp->arg_p != empty_arg_list)
129 free(expr->smp->arg_p);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]130 return expr;
131}
132
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]133/* Parse an ACL expression starting at <args>[0], and return it. If <err> is
134 * not NULL, it will be filled with a pointer to an error message in case of
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]135 * error. This pointer must be freeable or NULL. <al> is an arg_list serving
136 * as a list head to report missing dependencies.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]137 *
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]138 * Right now, the only accepted syntax is :
139 * <subject> [<value>...]
140 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]141struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]142{
143 __label__ out_return, out_free_expr, out_free_pattern;
144 struct acl_expr *expr;
145 struct acl_keyword *aclkw;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]146 struct pattern *pattern;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]147 int opaque, patflags;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]148 const char *arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]149 struct sample_expr *smp = NULL;
150 const char *p;
151 int idx = 0;
152 char *ckw = NULL;
153 const char *begw;
154 const char *endw;
155 unsigned long prev_type;
156 int cur_type;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]157
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]158 /* First, we lookd for an ACL keyword. And if we don't find one, then
159 * we look for a sample fetch keyword.
160 */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]161 aclkw = find_acl_kw(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]162 if (!aclkw || !aclkw->parse) {
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]163
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]164 smp = sample_parse_expr((char **)args, &idx, trash.str, trash.size, al);
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]165
166 if (!smp) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]167 memprintf(err, "unknown ACL or sample keyword '%s': %s", *args, trash.str);
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]168 goto out_return;
169 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]170 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]171
172 expr = (struct acl_expr *)calloc(1, sizeof(*expr));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]173 if (!expr) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]174 memprintf(err, "out of memory when parsing ACL expression");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]175 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]176 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]177
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]178 pattern_init_expr(&expr->pat);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]179
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]180 expr->kw = aclkw ? aclkw->kw : smp->fetch->kw;
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]181 expr->pat.parse = aclkw ? aclkw->parse : NULL;
182 expr->pat.match = aclkw ? aclkw->match : NULL;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]183 expr->smp = aclkw ? NULL : smp;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]184
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]185 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]186 /* some types can be automatically converted */
187
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]188 switch (expr->smp ? expr->smp->fetch->out_type : aclkw->smp->out_type) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]189 case SMP_T_BOOL:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]190 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
191 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]192 break;
193 case SMP_T_SINT:
194 case SMP_T_UINT:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]195 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
196 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]197 break;
198 case SMP_T_IPV4:
199 case SMP_T_IPV6:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]200 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
201 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]202 break;
203 }
204 }
205
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]206 /* now parse the rest of acl only if "find_acl_kw" match */
207 if (aclkw) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]208
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]209 /* build new sample expression */
210 expr->smp = calloc(1, sizeof(struct sample_expr));
211 if (!expr->smp) {
212 memprintf(err, "out of memory when parsing ACL expression");
213 goto out_return;
214 }
215 LIST_INIT(&(expr->smp->conv_exprs));
216 expr->smp->fetch = aclkw->smp;
217 expr->smp->arg_p = empty_arg_list;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]218
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]219 /* look for the begining of the subject arguments */
220 p = strchr(args[0], ',');
221 arg = strchr(args[0], '(');
222 if (p && arg && p < arg)
223 arg = NULL;
224
225 if (expr->smp->fetch->arg_mask) {
226 int nbargs = 0;
227 char *end;
228
229 if (arg != NULL) {
230 /* there are 0 or more arguments in the form "subject(arg[,arg]*)" */
231 arg++;
232 end = strchr(arg, ')');
233 if (!end) {
234 memprintf(err, "missing closing ')' after arguments to ACL keyword '%s'", expr->kw);
235 goto out_free_expr;
236 }
237
238 /* Parse the arguments. Note that currently we have no way to
239 * report parsing errors, hence the NULL in the error pointers.
240 * An error is also reported if some mandatory arguments are
241 * missing. We prepare the args list to report unresolved
242 * dependencies.
243 */
244 al->ctx = ARGC_ACL;
245 al->kw = expr->kw;
246 al->conv = NULL;
247 nbargs = make_arg_list(arg, end - arg, expr->smp->fetch->arg_mask, &expr->smp->arg_p,
248 err, NULL, NULL, al);
249 if (nbargs < 0) {
250 /* note that make_arg_list will have set <err> here */
251 memprintf(err, "in argument to '%s', %s", expr->kw, *err);
252 goto out_free_expr;
253 }
254
255 if (!expr->smp->arg_p)
256 expr->smp->arg_p = empty_arg_list;
257
258 if (expr->smp->fetch->val_args && !expr->smp->fetch->val_args(expr->smp->arg_p, err)) {
259 /* invalid keyword argument, error must have been
260 * set by val_args().
261 */
262 memprintf(err, "in argument to '%s', %s", expr->kw, *err);
263 goto out_free_expr;
264 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]265 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]266 else if (ARGM(expr->smp->fetch->arg_mask) == 1) {
267 int type = (expr->smp->fetch->arg_mask >> 4) & 15;
Willy Tarreauae52f062012-04-26 12:13:35 +0200[diff] [blame]268
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]269 /* If a proxy is noted as a mandatory argument, we'll fake
270 * an empty one so that acl_find_targets() resolves it as
271 * the current one later.
272 */
273 if (type != ARGT_FE && type != ARGT_BE && type != ARGT_TAB) {
274 memprintf(err, "ACL keyword '%s' expects %d arguments", expr->kw, ARGM(expr->smp->fetch->arg_mask));
275 goto out_free_expr;
276 }
Willy Tarreau2e845be2012-10-19 19:49:09 +0200[diff] [blame]277
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]278 /* Build an arg list containing the type as an empty string
279 * and the usual STOP.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]280 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]281 expr->smp->arg_p = calloc(2, sizeof(*expr->smp->arg_p));
282 expr->smp->arg_p[0].type = type;
283 expr->smp->arg_p[0].unresolved = 1;
284 expr->smp->arg_p[0].data.str.str = strdup("");
285 expr->smp->arg_p[0].data.str.size = 1;
286 expr->smp->arg_p[0].data.str.len = 0;
287
288 al->ctx = ARGC_ACL;
289 al->kw = expr->kw;
290 al->conv = NULL;
291 arg_list_add(al, &expr->smp->arg_p[0], 0);
292
293 expr->smp->arg_p[1].type = ARGT_STOP;
294 }
295 else if (ARGM(expr->smp->fetch->arg_mask)) {
296 /* there were some mandatory arguments */
297 memprintf(err, "ACL keyword '%s' expects %d arguments", expr->kw, ARGM(expr->smp->fetch->arg_mask));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]298 goto out_free_expr;
299 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]300 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]301 else {
302 if (arg ) {
303 /* no argument expected */
304 memprintf(err, "ACL keyword '%s' takes no argument", expr->kw);
Willy Tarreaufc2c1fd2012-04-19 23:35:54 +0200[diff] [blame]305 goto out_free_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]306 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]307 }
Willy Tarreau9ca69362013-10-22 19:10:06 +0200[diff] [blame]308
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]309 /* Now process the converters if any. We have two supported syntaxes
310 * for the converters, which can be combined :
311 * - comma-delimited list of converters just after the keyword and args ;
312 * - one converter per keyword
313 * The combination allows to have each keyword being a comma-delimited
314 * series of converters.
315 *
316 * We want to process the former first, then the latter. For this we start
317 * from the beginning of the supposed place in the exiting conv chain, which
318 * starts at the last comma (endt).
319 */
Willy Tarreauf75d0082013-04-07 21:20:44 +0200[diff] [blame]320
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]321 /* look for the begining of the converters list */
322 arg = strchr(args[0], ',');
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]323 if (arg) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]324 prev_type = expr->smp->fetch->out_type;
325 while (1) {
326 struct sample_conv *conv;
327 struct sample_conv_expr *conv_expr;
328
329 if (*arg == ')') /* skip last closing parenthesis */
330 arg++;
331
332 if (*arg && *arg != ',') {
333 if (ckw)
334 memprintf(err, "ACL keyword '%s' : missing comma after conv keyword '%s'.",
335 expr->kw, ckw);
336 else
337 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
338 expr->kw);
339 goto out_free_expr;
340 }
341
342 while (*arg == ',') /* then trailing commas */
343 arg++;
344
345 begw = arg; /* start of conv keyword */
346
347 if (!*begw)
348 /* none ? end of converters */
349 break;
350
351 for (endw = begw; *endw && *endw != '(' && *endw != ','; endw++);
352
353 free(ckw);
354 ckw = my_strndup(begw, endw - begw);
355
356 conv = find_sample_conv(begw, endw - begw);
357 if (!conv) {
358 /* Unknown converter method */
359 memprintf(err, "ACL keyword '%s' : unknown conv method '%s'.",
360 expr->kw, ckw);
361 goto out_free_expr;
362 }
363
364 arg = endw;
365 if (*arg == '(') {
366 /* look for the end of this term */
367 while (*arg && *arg != ')')
368 arg++;
369 if (*arg != ')') {
370 memprintf(err, "ACL keyword '%s' : syntax error: missing ')' after conv keyword '%s'.",
371 expr->kw, ckw);
372 goto out_free_expr;
373 }
374 }
375
376 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
377 memprintf(err, "ACL keyword '%s' : returns type of conv method '%s' is unknown.",
378 expr->kw, ckw);
379 goto out_free_expr;
380 }
381
382 /* If impossible type conversion */
383 if (!sample_casts[prev_type][conv->in_type]) {
384 memprintf(err, "ACL keyword '%s' : conv method '%s' cannot be applied.",
385 expr->kw, ckw);
386 goto out_free_expr;
387 }
388
389 prev_type = conv->out_type;
390 conv_expr = calloc(1, sizeof(struct sample_conv_expr));
391 if (!conv_expr)
392 goto out_free_expr;
393
394 LIST_ADDQ(&(expr->smp->conv_exprs), &(conv_expr->list));
395 conv_expr->conv = conv;
396
397 if (arg != endw) {
398 char *err_msg = NULL;
399 int err_arg;
400
401 if (!conv->arg_mask) {
402 memprintf(err, "ACL keyword '%s' : conv method '%s' does not support any args.",
403 expr->kw, ckw);
404 goto out_free_expr;
405 }
406
407 al->kw = expr->smp->fetch->kw;
408 al->conv = conv_expr->conv->kw;
409 if (make_arg_list(endw + 1, arg - endw - 1, conv->arg_mask, &conv_expr->arg_p, &err_msg, NULL, &err_arg, al) < 0) {
410 memprintf(err, "ACL keyword '%s' : invalid arg %d in conv method '%s' : %s.",
411 expr->kw, err_arg+1, ckw, err_msg);
412 free(err_msg);
413 goto out_free_expr;
414 }
415
416 if (!conv_expr->arg_p)
417 conv_expr->arg_p = empty_arg_list;
418
Thierry FOURNIER9c1d67e2013-11-21 13:37:41 +0100[diff] [blame]419 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, &err_msg)) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]420 memprintf(err, "ACL keyword '%s' : invalid args in conv method '%s' : %s.",
421 expr->kw, ckw, err_msg);
422 free(err_msg);
423 goto out_free_expr;
424 }
425 }
426 else if (ARGM(conv->arg_mask)) {
427 memprintf(err, "ACL keyword '%s' : missing args for conv method '%s'.",
428 expr->kw, ckw);
429 goto out_free_expr;
430 }
431 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]432 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]433 }
434
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]435 /* Additional check to protect against common mistakes */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]436 cur_type = smp_expr_output_type(expr->smp);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]437 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]438 Warning("parsing acl keyword '%s' :\n"
439 " no pattern to match against were provided, so this ACL will never match.\n"
440 " If this is what you intended, please add '--' to get rid of this warning.\n"
441 " If you intended to match only for existence, please use '-m found'.\n"
442 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
443 "\n",
444 args[0]);
445 }
446
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]447 args++;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]448
449 /* check for options before patterns. Supported options are :
450 * -i : ignore case for all patterns by default
451 * -f : read patterns from those files
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]452 * -m : force matching method (must be used before -f)
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]453 * -- : everything after this is not an option
454 */
455 patflags = 0;
456 while (**args == '-') {
457 if ((*args)[1] == 'i')
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]458 patflags |= PAT_F_IGNORE_CASE;
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]459 else if ((*args)[1] == 'f') {
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]460 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]461 memprintf(err, "matching method must be specified first (using '-m') when using a sample fetch of this type ('%s')", expr->kw);
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]462 goto out_free_expr;
463 }
464
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]465 if (!pattern_read_from_file(&expr->pat, args[1], patflags | PAT_F_FROM_FILE, err))
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]466 goto out_free_expr;
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]467 args++;
468 }
469 else if ((*args)[1] == 'm') {
470 int idx;
471
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]472 if (!LIST_ISEMPTY(&expr->pat.patterns) || !eb_is_empty(&expr->pat.pattern_tree)) {
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]473 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
474 goto out_free_expr;
475 }
476
477 idx = acl_find_match_name(args[1]);
478 if (idx < 0) {
479 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
480 goto out_free_expr;
481 }
482
483 /* Note: -m found is always valid, bool/int are compatible, str/bin/reg/len are compatible */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]484 if (idx == PAT_MATCH_FOUND || /* -m found */
485 ((idx == PAT_MATCH_BOOL || idx == PAT_MATCH_INT) && /* -m bool/int */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]486 (cur_type == SMP_T_BOOL ||
487 cur_type == SMP_T_UINT ||
488 cur_type == SMP_T_SINT)) ||
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]489 (idx == PAT_MATCH_IP && /* -m ip */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]490 (cur_type == SMP_T_IPV4 ||
491 cur_type == SMP_T_IPV6)) ||
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]492 ((idx == PAT_MATCH_BIN || idx == PAT_MATCH_LEN || idx == PAT_MATCH_STR ||
493 idx == PAT_MATCH_BEG || idx == PAT_MATCH_SUB || idx == PAT_MATCH_DIR ||
494 idx == PAT_MATCH_DOM || idx == PAT_MATCH_END || idx == PAT_MATCH_REG) && /* strings */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]495 (cur_type == SMP_T_STR ||
496 cur_type == SMP_T_BIN ||
497 cur_type == SMP_T_CSTR ||
498 cur_type == SMP_T_CBIN))) {
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]499 expr->pat.parse = pat_parse_fcts[idx];
500 expr->pat.match = pat_match_fcts[idx];
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]501 }
502 else {
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]503 memprintf(err, "matching method '%s' cannot be used with fetch keyword '%s'", args[1], expr->kw);
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]504 goto out_free_expr;
505 }
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]506 args++;
507 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]508 else if ((*args)[1] == '-') {
509 args++;
510 break;
511 }
512 else
513 break;
514 args++;
515 }
516
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]517 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]518 memprintf(err, "matching method must be specified first (using '-m') when using a sample fetch of this type ('%s')", expr->kw);
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]519 goto out_free_expr;
520 }
521
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]522 /* now parse all patterns */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]523 opaque = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]524 while (**args) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]525 int ret;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]526 pattern = (struct pattern *)calloc(1, sizeof(*pattern));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]527 if (!pattern) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]528 memprintf(err, "out of memory when parsing ACL pattern");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]529 goto out_free_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]530 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]531 pattern->flags = patflags;
532
Willy Tarreauc92ddbc2012-04-27 22:10:57 +0200[diff] [blame]533 pattern->type = SMP_TYPES; /* unspecified type */
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]534 ret = expr->pat.parse(args, pattern, NULL, &opaque, err);
Willy Tarreau7dcb6482012-04-27 17:52:25 +0200[diff] [blame]535 if (!ret)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]536 goto out_free_pattern;
Willy Tarreau7dcb6482012-04-27 17:52:25 +0200[diff] [blame]537
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]538 LIST_ADDQ(&expr->pat.patterns, &pattern->list);
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]539 args += ret;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]540 }
541
542 return expr;
543
544 out_free_pattern:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]545 pattern_free(pattern);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]546 out_free_expr:
547 prune_acl_expr(expr);
548 free(expr);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]549 free(ckw);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]550 out_return:
551 return NULL;
552}
553
Krzysztof Piotr Oledzkia643baf2008-05-29 23:53:44 +0200[diff] [blame]554/* Purge everything in the acl <acl>, then return <acl>. */
555struct acl *prune_acl(struct acl *acl) {
556
557 struct acl_expr *expr, *exprb;
558
559 free(acl->name);
560
561 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
562 LIST_DEL(&expr->list);
563 prune_acl_expr(expr);
564 free(expr);
565 }
566
567 return acl;
568}
569
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]570/* Parse an ACL with the name starting at <args>[0], and with a list of already
571 * known ACLs in <acl>. If the ACL was not in the list, it will be added.
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]572 * A pointer to that ACL is returned. If the ACL has an empty name, then it's
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]573 * an anonymous one and it won't be merged with any other one. If <err> is not
574 * NULL, it will be filled with an appropriate error. This pointer must be
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]575 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
576 * dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]577 *
578 * args syntax: <aclname> <acl_expr>
579 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]580struct acl *parse_acl(const char **args, struct list *known_acl, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]581{
582 __label__ out_return, out_free_acl_expr, out_free_name;
583 struct acl *cur_acl;
584 struct acl_expr *acl_expr;
585 char *name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]586 const char *pos;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]587
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]588 if (**args && (pos = invalid_char(*args))) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]589 memprintf(err, "invalid character in ACL name : '%c'", *pos);
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]590 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]591 }
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]592
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]593 acl_expr = parse_acl_expr(args + 1, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]594 if (!acl_expr) {
595 /* parse_acl_expr will have filled <err> here */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]596 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]597 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]598
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]599 /* Check for args beginning with an opening parenthesis just after the
600 * subject, as this is almost certainly a typo. Right now we can only
601 * emit a warning, so let's do so.
602 */
Krzysztof Piotr Oledzki4cdd8312009-10-05 00:23:35 +0200[diff] [blame]603 if (!strchr(args[1], '(') && *args[2] == '(')
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]604 Warning("parsing acl '%s' :\n"
605 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
606 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
607 " If you are really sure this is not an error, please insert '--' between the\n"
608 " match and the pattern to make this warning message disappear.\n",
609 args[0], args[1], args[2]);
610
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]611 if (*args[0])
612 cur_acl = find_acl_by_name(args[0], known_acl);
613 else
614 cur_acl = NULL;
615
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]616 if (!cur_acl) {
617 name = strdup(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]618 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]619 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]620 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]621 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]622 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]623 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]624 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]625 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]626 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]627
628 LIST_INIT(&cur_acl->expr);
629 LIST_ADDQ(known_acl, &cur_acl->list);
630 cur_acl->name = name;
631 }
632
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]633 /* We want to know what features the ACL needs (typically HTTP parsing),
634 * and where it may be used. If an ACL relies on multiple matches, it is
635 * OK if at least one of them may match in the context where it is used.
636 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]637 cur_acl->use |= acl_expr->smp->fetch->use;
638 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]639 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
640 return cur_acl;
641
642 out_free_name:
643 free(name);
644 out_free_acl_expr:
645 prune_acl_expr(acl_expr);
646 free(acl_expr);
647 out_return:
648 return NULL;
649}
650
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]651/* Some useful ACLs provided by default. Only those used are allocated. */
652
653const struct {
654 const char *name;
655 const char *expr[4]; /* put enough for longest expression */
656} default_acl_list[] = {
Willy Tarreau58393e12008-07-20 10:39:22 +0200[diff] [blame]657 { .name = "TRUE", .expr = {"always_true",""}},
658 { .name = "FALSE", .expr = {"always_false",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]659 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]660 { .name = "HTTP", .expr = {"req_proto_http",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]661 { .name = "HTTP_1.0", .expr = {"req_ver","1.0",""}},
662 { .name = "HTTP_1.1", .expr = {"req_ver","1.1",""}},
663 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
664 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
665 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
666 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
667 { .name = "METH_POST", .expr = {"method","POST",""}},
668 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
669 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
670 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
671 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
672 { .name = "HTTP_CONTENT", .expr = {"hdr_val(content-length)","gt","0",""}},
Emeric Brunbede3d02009-06-30 17:54:00 +0200[diff] [blame]673 { .name = "RDP_COOKIE", .expr = {"req_rdp_cookie_cnt","gt","0",""}},
Willy Tarreauc6317702008-07-20 09:29:50 +0200[diff] [blame]674 { .name = "REQ_CONTENT", .expr = {"req_len","gt","0",""}},
Willy Tarreaub6fb4202008-07-20 11:18:28 +0200[diff] [blame]675 { .name = "WAIT_END", .expr = {"wait_end",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]676 { .name = NULL, .expr = {""}}
677};
678
679/* Find a default ACL from the default_acl list, compile it and return it.
680 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
681 * except when default ACLs are broken, in which case it will return NULL.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]682 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
683 * not NULL, it will be filled with an error message if an error occurs. This
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]684 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
685 * to report missing dependencies.
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]686 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]687static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
688 char **err, struct arg_list *al)
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]689{
690 __label__ out_return, out_free_acl_expr, out_free_name;
691 struct acl *cur_acl;
692 struct acl_expr *acl_expr;
693 char *name;
694 int index;
695
696 for (index = 0; default_acl_list[index].name != NULL; index++) {
697 if (strcmp(acl_name, default_acl_list[index].name) == 0)
698 break;
699 }
700
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]701 if (default_acl_list[index].name == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]702 memprintf(err, "no such ACL : '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]703 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]704 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]705
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]706 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]707 if (!acl_expr) {
708 /* parse_acl_expr must have filled err here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]709 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]710 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]711
712 name = strdup(acl_name);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]713 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]714 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]715 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]716 }
717
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]718 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]719 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]720 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]721 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]722 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]723
724 cur_acl->name = name;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]725 cur_acl->use |= acl_expr->smp->fetch->use;
726 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]727 LIST_INIT(&cur_acl->expr);
728 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
729 if (known_acl)
730 LIST_ADDQ(known_acl, &cur_acl->list);
731
732 return cur_acl;
733
734 out_free_name:
735 free(name);
736 out_free_acl_expr:
737 prune_acl_expr(acl_expr);
738 free(acl_expr);
739 out_return:
740 return NULL;
741}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]742
743/* Purge everything in the acl_cond <cond>, then return <cond>. */
744struct acl_cond *prune_acl_cond(struct acl_cond *cond)
745{
746 struct acl_term_suite *suite, *tmp_suite;
747 struct acl_term *term, *tmp_term;
748
749 /* iterate through all term suites and free all terms and all suites */
750 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
751 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
752 free(term);
753 free(suite);
754 }
755 return cond;
756}
757
758/* Parse an ACL condition starting at <args>[0], relying on a list of already
759 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]760 * case of low memory). Supports multiple conditions separated by "or". If
761 * <err> is not NULL, it will be filled with a pointer to an error message in
762 * case of error, that the caller is responsible for freeing. The initial
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]763 * location must either be freeable or NULL. The list <al> serves as a list head
764 * for unresolved dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]765 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]766struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame^]767 enum acl_cond_pol pol, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]768{
769 __label__ out_return, out_free_suite, out_free_term;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]770 int arg, neg;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]771 const char *word;
772 struct acl *cur_acl;
773 struct acl_term *cur_term;
774 struct acl_term_suite *cur_suite;
775 struct acl_cond *cond;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]776 unsigned int suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]777
778 cond = (struct acl_cond *)calloc(1, sizeof(*cond));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]779 if (cond == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]780 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]781 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]782 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]783
784 LIST_INIT(&cond->list);
785 LIST_INIT(&cond->suites);
786 cond->pol = pol;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]787 cond->val = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]788
789 cur_suite = NULL;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]790 suite_val = ~0U;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]791 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]792 for (arg = 0; *args[arg]; arg++) {
793 word = args[arg];
794
795 /* remove as many exclamation marks as we can */
796 while (*word == '!') {
797 neg = !neg;
798 word++;
799 }
800
801 /* an empty word is allowed because we cannot force the user to
802 * always think about not leaving exclamation marks alone.
803 */
804 if (!*word)
805 continue;
806
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]807 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]808 /* new term suite */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]809 cond->val |= suite_val;
810 suite_val = ~0U;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]811 cur_suite = NULL;
812 neg = 0;
813 continue;
814 }
815
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]816 if (strcmp(word, "{") == 0) {
817 /* we may have a complete ACL expression between two braces,
818 * find the last one.
819 */
820 int arg_end = arg + 1;
821 const char **args_new;
822
823 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
824 arg_end++;
825
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]826 if (!*args[arg_end]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]827 memprintf(err, "missing closing '}' in condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]828 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]829 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]830
831 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]832 if (!args_new) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]833 memprintf(err, "out of memory when parsing condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]834 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]835 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]836
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]837 args_new[0] = "";
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]838 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
839 args_new[arg_end - arg] = "";
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]840 cur_acl = parse_acl(args_new, known_acl, err, al);
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]841 free(args_new);
842
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]843 if (!cur_acl) {
844 /* note that parse_acl() must have filled <err> here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]845 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]846 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]847 word = args[arg + 1];
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]848 arg = arg_end;
849 }
850 else {
851 /* search for <word> in the known ACL names. If we do not find
852 * it, let's look for it in the default ACLs, and if found, add
853 * it to the list of ACLs of this proxy. This makes it possible
854 * to override them.
855 */
856 cur_acl = find_acl_by_name(word, known_acl);
857 if (cur_acl == NULL) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]858 cur_acl = find_acl_default(word, known_acl, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]859 if (cur_acl == NULL) {
860 /* note that find_acl_default() must have filled <err> here */
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]861 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]862 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]863 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]864 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]865
866 cur_term = (struct acl_term *)calloc(1, sizeof(*cur_term));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]867 if (cur_term == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]868 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]869 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]870 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]871
872 cur_term->acl = cur_acl;
873 cur_term->neg = neg;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]874
875 /* Here it is a bit complex. The acl_term_suite is a conjunction
876 * of many terms. It may only be used if all of its terms are
877 * usable at the same time. So the suite's validity domain is an
878 * AND between all ACL keywords' ones. But, the global condition
879 * is valid if at least one term suite is OK. So it's an OR between
880 * all of their validity domains. We could emit a warning as soon
881 * as suite_val is null because it means that the last ACL is not
882 * compatible with the previous ones. Let's remain simple for now.
883 */
884 cond->use |= cur_acl->use;
885 suite_val &= cur_acl->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]886
887 if (!cur_suite) {
888 cur_suite = (struct acl_term_suite *)calloc(1, sizeof(*cur_suite));
Willy Tarreauf678b7f2013-01-24 00:25:39 +0100[diff] [blame]889 if (cur_suite == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]890 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]891 goto out_free_term;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]892 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]893 LIST_INIT(&cur_suite->terms);
894 LIST_ADDQ(&cond->suites, &cur_suite->list);
895 }
896 LIST_ADDQ(&cur_suite->terms, &cur_term->list);
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]897 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]898 }
899
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]900 cond->val |= suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]901 return cond;
902
903 out_free_term:
904 free(cur_term);
905 out_free_suite:
906 prune_acl_cond(cond);
907 free(cond);
908 out_return:
909 return NULL;
910}
911
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]912/* Builds an ACL condition starting at the if/unless keyword. The complete
913 * condition is returned. NULL is returned in case of error or if the first
914 * word is neither "if" nor "unless". It automatically sets the file name and
Willy Tarreau25320b22013-03-24 07:22:08 +0100[diff] [blame]915 * the line number in the condition for better error reporting, and sets the
916 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]917 * be filled with a pointer to an error message in case of error, that the
918 * caller is responsible for freeing. The initial location must either be
919 * freeable or NULL.
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]920 */
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]921struct acl_cond *build_acl_cond(const char *file, int line, struct proxy *px, const char **args, char **err)
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]922{
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame^]923 enum acl_cond_pol pol = ACL_COND_NONE;
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]924 struct acl_cond *cond = NULL;
925
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]926 if (err)
927 *err = NULL;
928
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]929 if (!strcmp(*args, "if")) {
930 pol = ACL_COND_IF;
931 args++;
932 }
933 else if (!strcmp(*args, "unless")) {
934 pol = ACL_COND_UNLESS;
935 args++;
936 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]937 else {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]938 memprintf(err, "conditions must start with either 'if' or 'unless'");
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]939 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]940 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]941
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]942 cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]943 if (!cond) {
944 /* note that parse_acl_cond must have filled <err> here */
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]945 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]946 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]947
948 cond->file = file;
949 cond->line = line;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]950 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]951 return cond;
952}
953
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]954/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
955 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]956 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]957 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
958 * function only computes the condition, it does not apply the polarity required
959 * by IF/UNLESS, it's up to the caller to do this using something like this :
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]960 *
961 * res = acl_pass(res);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]962 * if (res == ACL_TEST_MISS)
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]963 * return 0;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]964 * if (cond->pol == ACL_COND_UNLESS)
965 * res = !res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]966 */
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame^]967enum acl_test_res acl_exec_cond(struct acl_cond *cond, struct proxy *px, struct session *l4, void *l7, unsigned int opt)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]968{
969 __label__ fetch_next;
970 struct acl_term_suite *suite;
971 struct acl_term *term;
972 struct acl_expr *expr;
973 struct acl *acl;
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]974 struct sample smp;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame^]975 enum acl_test_res acl_res, suite_res, cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]976
Willy Tarreau7a777ed2012-04-26 11:44:02 +0200[diff] [blame]977 /* ACLs are iterated over all values, so let's always set the flag to
978 * indicate this to the fetch functions.
979 */
980 opt |= SMP_OPT_ITERATE;
981
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]982 /* We're doing a logical OR between conditions so we initialize to FAIL.
983 * The MISS status is propagated down from the suites.
984 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]985 cond_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]986 list_for_each_entry(suite, &cond->suites, list) {
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]987 /* Evaluate condition suite <suite>. We stop at the first term
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame^]988 * which returns ACL_TEST_FAIL. The MISS status is still propagated
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]989 * in case of uncertainty in the result.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]990 */
991
992 /* we're doing a logical AND between terms, so we must set the
993 * initial value to PASS.
994 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]995 suite_res = ACL_TEST_PASS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]996 list_for_each_entry(term, &suite->terms, list) {
997 acl = term->acl;
998
999 /* FIXME: use cache !
1000 * check acl->cache_idx for this.
1001 */
1002
1003 /* ACL result not cached. Let's scan all the expressions
1004 * and use the first one to match.
1005 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1006 acl_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1007 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]1008 /* we need to reset context and flags */
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1009 memset(&smp, 0, sizeof(smp));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1010 fetch_next:
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1011 if (!sample_process(px, l4, l7, opt, expr->smp, &smp)) {
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1012 /* maybe we could not fetch because of missing data */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1013 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1014 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1015 continue;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1016 }
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]1017
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame^]1018 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, NULL));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1019 /*
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1020 * OK now acl_res holds the result of this expression
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1021 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1022 *
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1023 * Then if (!MISS) we can cache the result, and put
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1024 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1025 *
1026 * FIXME: implement cache.
1027 *
1028 */
1029
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1030 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1031 if (acl_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1032 break;
1033
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1034 if (smp.flags & SMP_F_NOT_LAST)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1035 goto fetch_next;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1036
1037 /* sometimes we know the fetched data is subject to change
1038 * later and give another chance for a new match (eg: request
1039 * size, time, ...)
1040 */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1041 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1042 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1043 }
1044 /*
1045 * Here we have the result of an ACL (cached or not).
1046 * ACLs are combined, negated or not, to form conditions.
1047 */
1048
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1049 if (term->neg)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1050 acl_res = acl_neg(acl_res);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1051
1052 suite_res &= acl_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1053
Willy Tarreau79c412b2013-10-30 19:30:32 +0100[diff] [blame]1054 /* we're ANDing these terms, so a single FAIL or MISS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1055 if (suite_res != ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1056 break;
1057 }
1058 cond_res |= suite_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1059
1060 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1061 if (cond_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1062 break;
1063 }
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1064 return cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1065}
1066
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1067/* Returns a pointer to the first ACL conflicting with usage at place <where>
1068 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
1069 * no conflict is found. Only full conflicts are detected (ACL is not usable).
1070 * Use the next function to check for useless keywords.
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1071 */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1072const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1073{
1074 struct acl_term_suite *suite;
1075 struct acl_term *term;
1076 struct acl *acl;
1077
1078 list_for_each_entry(suite, &cond->suites, list) {
1079 list_for_each_entry(term, &suite->terms, list) {
1080 acl = term->acl;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1081 if (!(acl->val & where))
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1082 return acl;
1083 }
1084 }
1085 return NULL;
1086}
1087
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1088/* Returns a pointer to the first ACL and its first keyword to conflict with
1089 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
1090 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
1091 * null), or false if not conflict is found. The first useless keyword is
1092 * returned.
1093 */
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1094int acl_cond_kw_conflicts(const struct acl_cond *cond, unsigned int where, struct acl const **acl, char const **kw)
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1095{
1096 struct acl_term_suite *suite;
1097 struct acl_term *term;
1098 struct acl_expr *expr;
1099
1100 list_for_each_entry(suite, &cond->suites, list) {
1101 list_for_each_entry(term, &suite->terms, list) {
1102 list_for_each_entry(expr, &term->acl->expr, list) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1103 if (!(expr->smp->fetch->val & where)) {
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1104 if (acl)
1105 *acl = term->acl;
1106 if (kw)
1107 *kw = expr->kw;
1108 return 1;
1109 }
1110 }
1111 }
1112 }
1113 return 0;
1114}
1115
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1116/*
1117 * Find targets for userlist and groups in acl. Function returns the number
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1118 * of errors or OK if everything is fine. It must be called only once sample
1119 * fetch arguments have been resolved (after smp_resolve_args()).
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1120 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1121int acl_find_targets(struct proxy *p)
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1122{
1123
1124 struct acl *acl;
1125 struct acl_expr *expr;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1126 struct pattern *pattern;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1127 int cfgerr = 0;
1128
1129 list_for_each_entry(acl, &p->acl, list) {
1130 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1131 if (!strcmp(expr->kw, "http_auth_group")) {
1132 /* Note: the ARGT_USR argument may only have been resolved earlier
1133 * by smp_resolve_args().
1134 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1135 if (expr->smp->arg_p->unresolved) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1136 Alert("Internal bug in proxy %s: %sacl %s %s() makes use of unresolved userlist '%s'. Please report this.\n",
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1137 p->id, *acl->name ? "" : "anonymous ", acl->name, expr->kw, expr->smp->arg_p->data.str.str);
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1138 cfgerr++;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]1139 continue;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1140 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1141
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1142 if (LIST_ISEMPTY(&expr->pat.patterns)) {
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1143 Alert("proxy %s: acl %s %s(): no groups specified.\n",
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1144 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1145 cfgerr++;
1146 continue;
1147 }
1148
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1149 list_for_each_entry(pattern, &expr->pat.patterns, list) {
Willy Tarreau7d1df412012-11-23 23:47:36 +0100[diff] [blame]1150 /* this keyword only has one argument */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1151 pattern->val.group_mask = auth_resolve_groups(expr->smp->arg_p->data.usr, pattern->ptr.str);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1152
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1153 if (!pattern->val.group_mask) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1154 Alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
1155 p->id, acl->name, expr->kw, pattern->ptr.str);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1156 cfgerr++;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1157 }
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1158 free(pattern->ptr.str);
1159 pattern->ptr.str = NULL;
1160 pattern->len = 0;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1161 }
1162 }
1163 }
1164 }
1165
1166 return cfgerr;
1167}
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1168
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]1169/* initializes ACLs by resolving the sample fetch names they rely upon.
1170 * Returns 0 on success, otherwise an error.
1171 */
1172int init_acl()
1173{
1174 int err = 0;
1175 int index;
1176 const char *name;
1177 struct acl_kw_list *kwl;
1178 struct sample_fetch *smp;
1179
1180 list_for_each_entry(kwl, &acl_keywords.list, list) {
1181 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1182 name = kwl->kw[index].fetch_kw;
1183 if (!name)
1184 name = kwl->kw[index].kw;
1185
1186 smp = find_sample_fetch(name, strlen(name));
1187 if (!smp) {
1188 Alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1189 kwl->kw[index].kw, name);
1190 err++;
1191 continue;
1192 }
1193 kwl->kw[index].smp = smp;
1194 }
1195 }
1196 return err;
1197}
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1198
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1199/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1200/* All supported sample and ACL keywords must be declared here. */
1201/************************************************************************/
1202
1203/* Note: must not be declared <const> as its list will be overwritten.
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]1204 * Please take care of keeping this list alphabetically sorted.
1205 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200[diff] [blame]1206static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1207 { /* END */ },
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1208}};
1209
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1210__attribute__((constructor))
1211static void __acl_init(void)
1212{
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1213 acl_register_keywords(&acl_kws);
1214}
1215
1216
1217/*
1218 * Local variables:
1219 * c-indent-level: 8
1220 * c-basic-offset: 8
1221 * End:
1222 */