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git01.mediatek.com / haproxy / 2d351b68c20693343433da07ad7bb26dc31161c5 / . / src / acl.c
blob: e8d4dc3ece063a72b6190e455298cb6bc6f334b0 [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
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]41/* input values are 0 or 3, output is the same */
42static inline enum acl_test_res pat2acl(enum pat_match_res res)
43{
44 return (enum acl_test_res)res;
45}
46
Willy Tarreaua5909832007-06-17 20:40:25 +0200[diff] [blame]47/*
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]48 * Registers the ACL keyword list <kwl> as a list of valid keywords for next
49 * parsing sessions.
50 */
51void acl_register_keywords(struct acl_kw_list *kwl)
52{
53 LIST_ADDQ(&acl_keywords.list, &kwl->list);
54}
55
56/*
57 * Unregisters the ACL keyword list <kwl> from the list of valid keywords.
58 */
59void acl_unregister_keywords(struct acl_kw_list *kwl)
60{
61 LIST_DEL(&kwl->list);
62 LIST_INIT(&kwl->list);
63}
64
65/* Return a pointer to the ACL <name> within the list starting at <head>, or
66 * NULL if not found.
67 */
68struct acl *find_acl_by_name(const char *name, struct list *head)
69{
70 struct acl *acl;
71 list_for_each_entry(acl, head, list) {
72 if (strcmp(acl->name, name) == 0)
73 return acl;
74 }
75 return NULL;
76}
77
78/* Return a pointer to the ACL keyword <kw>, or NULL if not found. Note that if
79 * <kw> contains an opening parenthesis, only the left part of it is checked.
80 */
81struct 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 = strchr(kw, '(');
88 if (!kwend)
89 kwend = kw + strlen(kw);
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
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]101static struct acl_expr *prune_acl_expr(struct acl_expr *expr)
102{
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]103 struct arg *arg;
104
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]105 pattern_prune_expr(&expr->pat);
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]106
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]107 for (arg = expr->smp->arg_p; arg; arg++) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]108 if (arg->type == ARGT_STOP)
109 break;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]110 if (arg->type == ARGT_STR || arg->unresolved) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]111 free(arg->data.str.str);
112 arg->data.str.str = NULL;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]113 arg->unresolved = 0;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]114 }
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]115 }
116
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]117 if (expr->smp->arg_p != empty_arg_list)
118 free(expr->smp->arg_p);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]119 return expr;
120}
121
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]122/* Parse an ACL expression starting at <args>[0], and return it. If <err> is
123 * 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]124 * error. This pointer must be freeable or NULL. <al> is an arg_list serving
125 * as a list head to report missing dependencies.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]126 *
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]127 * Right now, the only accepted syntax is :
128 * <subject> [<value>...]
129 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]130struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]131{
132 __label__ out_return, out_free_expr, out_free_pattern;
133 struct acl_expr *expr;
134 struct acl_keyword *aclkw;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]135 struct pattern *pattern;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]136 int opaque, patflags;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]137 const char *arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]138 struct sample_expr *smp = NULL;
139 const char *p;
140 int idx = 0;
141 char *ckw = NULL;
142 const char *begw;
143 const char *endw;
144 unsigned long prev_type;
145 int cur_type;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]146
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]147 /* First, we lookd for an ACL keyword. And if we don't find one, then
148 * we look for a sample fetch keyword.
149 */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]150 aclkw = find_acl_kw(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]151 if (!aclkw || !aclkw->parse) {
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]152
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]153 smp = sample_parse_expr((char **)args, &idx, trash.str, trash.size, al);
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]154
155 if (!smp) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]156 memprintf(err, "unknown ACL or sample keyword '%s': %s", *args, trash.str);
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]157 goto out_return;
158 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]159 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]160
161 expr = (struct acl_expr *)calloc(1, sizeof(*expr));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]162 if (!expr) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]163 memprintf(err, "out of memory when parsing ACL expression");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]164 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]165 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]166
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]167 pattern_init_expr(&expr->pat);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]168
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]169 expr->kw = aclkw ? aclkw->kw : smp->fetch->kw;
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]170 expr->pat.parse = aclkw ? aclkw->parse : NULL;
171 expr->pat.match = aclkw ? aclkw->match : NULL;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]172 expr->smp = aclkw ? NULL : smp;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]173
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]174 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]175 /* some types can be automatically converted */
176
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]177 switch (expr->smp ? expr->smp->fetch->out_type : aclkw->smp->out_type) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]178 case SMP_T_BOOL:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]179 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
180 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]181 break;
182 case SMP_T_SINT:
183 case SMP_T_UINT:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]184 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
185 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]186 break;
187 case SMP_T_IPV4:
188 case SMP_T_IPV6:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]189 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
190 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]191 break;
192 }
193 }
194
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]195 /* now parse the rest of acl only if "find_acl_kw" match */
196 if (aclkw) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]197
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]198 /* build new sample expression */
199 expr->smp = calloc(1, sizeof(struct sample_expr));
200 if (!expr->smp) {
201 memprintf(err, "out of memory when parsing ACL expression");
202 goto out_return;
203 }
204 LIST_INIT(&(expr->smp->conv_exprs));
205 expr->smp->fetch = aclkw->smp;
206 expr->smp->arg_p = empty_arg_list;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]207
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]208 /* look for the begining of the subject arguments */
209 p = strchr(args[0], ',');
210 arg = strchr(args[0], '(');
211 if (p && arg && p < arg)
212 arg = NULL;
213
214 if (expr->smp->fetch->arg_mask) {
215 int nbargs = 0;
216 char *end;
217
218 if (arg != NULL) {
219 /* there are 0 or more arguments in the form "subject(arg[,arg]*)" */
220 arg++;
221 end = strchr(arg, ')');
222 if (!end) {
223 memprintf(err, "missing closing ')' after arguments to ACL keyword '%s'", expr->kw);
224 goto out_free_expr;
225 }
226
227 /* Parse the arguments. Note that currently we have no way to
228 * report parsing errors, hence the NULL in the error pointers.
229 * An error is also reported if some mandatory arguments are
230 * missing. We prepare the args list to report unresolved
231 * dependencies.
232 */
233 al->ctx = ARGC_ACL;
234 al->kw = expr->kw;
235 al->conv = NULL;
236 nbargs = make_arg_list(arg, end - arg, expr->smp->fetch->arg_mask, &expr->smp->arg_p,
237 err, NULL, NULL, al);
238 if (nbargs < 0) {
239 /* note that make_arg_list will have set <err> here */
240 memprintf(err, "in argument to '%s', %s", expr->kw, *err);
241 goto out_free_expr;
242 }
243
244 if (!expr->smp->arg_p)
245 expr->smp->arg_p = empty_arg_list;
246
247 if (expr->smp->fetch->val_args && !expr->smp->fetch->val_args(expr->smp->arg_p, err)) {
248 /* invalid keyword argument, error must have been
249 * set by val_args().
250 */
251 memprintf(err, "in argument to '%s', %s", expr->kw, *err);
252 goto out_free_expr;
253 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]254 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]255 else if (ARGM(expr->smp->fetch->arg_mask) == 1) {
256 int type = (expr->smp->fetch->arg_mask >> 4) & 15;
Willy Tarreauae52f062012-04-26 12:13:35 +0200[diff] [blame]257
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]258 /* If a proxy is noted as a mandatory argument, we'll fake
259 * an empty one so that acl_find_targets() resolves it as
260 * the current one later.
261 */
262 if (type != ARGT_FE && type != ARGT_BE && type != ARGT_TAB) {
263 memprintf(err, "ACL keyword '%s' expects %d arguments", expr->kw, ARGM(expr->smp->fetch->arg_mask));
264 goto out_free_expr;
265 }
Willy Tarreau2e845be2012-10-19 19:49:09 +0200[diff] [blame]266
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]267 /* Build an arg list containing the type as an empty string
268 * and the usual STOP.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]269 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]270 expr->smp->arg_p = calloc(2, sizeof(*expr->smp->arg_p));
271 expr->smp->arg_p[0].type = type;
272 expr->smp->arg_p[0].unresolved = 1;
273 expr->smp->arg_p[0].data.str.str = strdup("");
274 expr->smp->arg_p[0].data.str.size = 1;
275 expr->smp->arg_p[0].data.str.len = 0;
276
277 al->ctx = ARGC_ACL;
278 al->kw = expr->kw;
279 al->conv = NULL;
280 arg_list_add(al, &expr->smp->arg_p[0], 0);
281
282 expr->smp->arg_p[1].type = ARGT_STOP;
283 }
284 else if (ARGM(expr->smp->fetch->arg_mask)) {
285 /* there were some mandatory arguments */
286 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]287 goto out_free_expr;
288 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]289 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]290 else {
291 if (arg ) {
292 /* no argument expected */
293 memprintf(err, "ACL keyword '%s' takes no argument", expr->kw);
Willy Tarreaufc2c1fd2012-04-19 23:35:54 +0200[diff] [blame]294 goto out_free_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]295 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]296 }
Willy Tarreau9ca69362013-10-22 19:10:06 +0200[diff] [blame]297
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]298 /* Now process the converters if any. We have two supported syntaxes
299 * for the converters, which can be combined :
300 * - comma-delimited list of converters just after the keyword and args ;
301 * - one converter per keyword
302 * The combination allows to have each keyword being a comma-delimited
303 * series of converters.
304 *
305 * We want to process the former first, then the latter. For this we start
306 * from the beginning of the supposed place in the exiting conv chain, which
307 * starts at the last comma (endt).
308 */
Willy Tarreauf75d0082013-04-07 21:20:44 +0200[diff] [blame]309
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]310 /* look for the begining of the converters list */
311 arg = strchr(args[0], ',');
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]312 if (arg) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]313 prev_type = expr->smp->fetch->out_type;
314 while (1) {
315 struct sample_conv *conv;
316 struct sample_conv_expr *conv_expr;
317
318 if (*arg == ')') /* skip last closing parenthesis */
319 arg++;
320
321 if (*arg && *arg != ',') {
322 if (ckw)
323 memprintf(err, "ACL keyword '%s' : missing comma after conv keyword '%s'.",
324 expr->kw, ckw);
325 else
326 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
327 expr->kw);
328 goto out_free_expr;
329 }
330
331 while (*arg == ',') /* then trailing commas */
332 arg++;
333
334 begw = arg; /* start of conv keyword */
335
336 if (!*begw)
337 /* none ? end of converters */
338 break;
339
340 for (endw = begw; *endw && *endw != '(' && *endw != ','; endw++);
341
342 free(ckw);
343 ckw = my_strndup(begw, endw - begw);
344
345 conv = find_sample_conv(begw, endw - begw);
346 if (!conv) {
347 /* Unknown converter method */
348 memprintf(err, "ACL keyword '%s' : unknown conv method '%s'.",
349 expr->kw, ckw);
350 goto out_free_expr;
351 }
352
353 arg = endw;
354 if (*arg == '(') {
355 /* look for the end of this term */
356 while (*arg && *arg != ')')
357 arg++;
358 if (*arg != ')') {
359 memprintf(err, "ACL keyword '%s' : syntax error: missing ')' after conv keyword '%s'.",
360 expr->kw, ckw);
361 goto out_free_expr;
362 }
363 }
364
365 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
366 memprintf(err, "ACL keyword '%s' : returns type of conv method '%s' is unknown.",
367 expr->kw, ckw);
368 goto out_free_expr;
369 }
370
371 /* If impossible type conversion */
372 if (!sample_casts[prev_type][conv->in_type]) {
373 memprintf(err, "ACL keyword '%s' : conv method '%s' cannot be applied.",
374 expr->kw, ckw);
375 goto out_free_expr;
376 }
377
378 prev_type = conv->out_type;
379 conv_expr = calloc(1, sizeof(struct sample_conv_expr));
380 if (!conv_expr)
381 goto out_free_expr;
382
383 LIST_ADDQ(&(expr->smp->conv_exprs), &(conv_expr->list));
384 conv_expr->conv = conv;
385
386 if (arg != endw) {
387 char *err_msg = NULL;
388 int err_arg;
389
390 if (!conv->arg_mask) {
391 memprintf(err, "ACL keyword '%s' : conv method '%s' does not support any args.",
392 expr->kw, ckw);
393 goto out_free_expr;
394 }
395
396 al->kw = expr->smp->fetch->kw;
397 al->conv = conv_expr->conv->kw;
398 if (make_arg_list(endw + 1, arg - endw - 1, conv->arg_mask, &conv_expr->arg_p, &err_msg, NULL, &err_arg, al) < 0) {
399 memprintf(err, "ACL keyword '%s' : invalid arg %d in conv method '%s' : %s.",
400 expr->kw, err_arg+1, ckw, err_msg);
401 free(err_msg);
402 goto out_free_expr;
403 }
404
405 if (!conv_expr->arg_p)
406 conv_expr->arg_p = empty_arg_list;
407
Thierry FOURNIER9c1d67e2013-11-21 13:37:41 +0100[diff] [blame]408 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, &err_msg)) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]409 memprintf(err, "ACL keyword '%s' : invalid args in conv method '%s' : %s.",
410 expr->kw, ckw, err_msg);
411 free(err_msg);
412 goto out_free_expr;
413 }
414 }
415 else if (ARGM(conv->arg_mask)) {
416 memprintf(err, "ACL keyword '%s' : missing args for conv method '%s'.",
417 expr->kw, ckw);
418 goto out_free_expr;
419 }
420 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]421 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]422 }
423
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]424 /* Additional check to protect against common mistakes */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]425 cur_type = smp_expr_output_type(expr->smp);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]426 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]427 Warning("parsing acl keyword '%s' :\n"
428 " no pattern to match against were provided, so this ACL will never match.\n"
429 " If this is what you intended, please add '--' to get rid of this warning.\n"
430 " If you intended to match only for existence, please use '-m found'.\n"
431 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
432 "\n",
433 args[0]);
434 }
435
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]436 args++;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]437
438 /* check for options before patterns. Supported options are :
439 * -i : ignore case for all patterns by default
440 * -f : read patterns from those files
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]441 * -m : force matching method (must be used before -f)
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]442 * -- : everything after this is not an option
443 */
444 patflags = 0;
445 while (**args == '-') {
446 if ((*args)[1] == 'i')
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]447 patflags |= PAT_F_IGNORE_CASE;
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]448 else if ((*args)[1] == 'f') {
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]449 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]450 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]451 goto out_free_expr;
452 }
453
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]454 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]455 goto out_free_expr;
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]456 args++;
457 }
458 else if ((*args)[1] == 'm') {
459 int idx;
460
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]461 if (!LIST_ISEMPTY(&expr->pat.patterns) || !eb_is_empty(&expr->pat.pattern_tree)) {
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]462 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
463 goto out_free_expr;
464 }
465
Willy Tarreau6f8fe312013-11-28 22:24:25 +0100[diff] [blame]466 idx = pat_find_match_name(args[1]);
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]467 if (idx < 0) {
468 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
469 goto out_free_expr;
470 }
471
472 /* 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]473 if (idx == PAT_MATCH_FOUND || /* -m found */
474 ((idx == PAT_MATCH_BOOL || idx == PAT_MATCH_INT) && /* -m bool/int */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]475 (cur_type == SMP_T_BOOL ||
476 cur_type == SMP_T_UINT ||
477 cur_type == SMP_T_SINT)) ||
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]478 (idx == PAT_MATCH_IP && /* -m ip */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]479 (cur_type == SMP_T_IPV4 ||
480 cur_type == SMP_T_IPV6)) ||
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]481 ((idx == PAT_MATCH_BIN || idx == PAT_MATCH_LEN || idx == PAT_MATCH_STR ||
482 idx == PAT_MATCH_BEG || idx == PAT_MATCH_SUB || idx == PAT_MATCH_DIR ||
483 idx == PAT_MATCH_DOM || idx == PAT_MATCH_END || idx == PAT_MATCH_REG) && /* strings */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]484 (cur_type == SMP_T_STR ||
485 cur_type == SMP_T_BIN ||
486 cur_type == SMP_T_CSTR ||
487 cur_type == SMP_T_CBIN))) {
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]488 expr->pat.parse = pat_parse_fcts[idx];
489 expr->pat.match = pat_match_fcts[idx];
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]490 }
491 else {
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]492 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]493 goto out_free_expr;
494 }
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]495 args++;
496 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]497 else if ((*args)[1] == '-') {
498 args++;
499 break;
500 }
501 else
502 break;
503 args++;
504 }
505
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]506 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]507 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]508 goto out_free_expr;
509 }
510
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]511 /* now parse all patterns */
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]512 opaque = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]513 while (**args) {
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]514 int ret;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]515 pattern = (struct pattern *)calloc(1, sizeof(*pattern));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]516 if (!pattern) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]517 memprintf(err, "out of memory when parsing ACL pattern");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]518 goto out_free_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]519 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]520 pattern->flags = patflags;
521
Willy Tarreauc92ddbc2012-04-27 22:10:57 +0200[diff] [blame]522 pattern->type = SMP_TYPES; /* unspecified type */
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]523 ret = expr->pat.parse(args, pattern, NULL, &opaque, err);
Willy Tarreau7dcb6482012-04-27 17:52:25 +0200[diff] [blame]524 if (!ret)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]525 goto out_free_pattern;
Willy Tarreau7dcb6482012-04-27 17:52:25 +0200[diff] [blame]526
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]527 LIST_ADDQ(&expr->pat.patterns, &pattern->list);
Willy Tarreauae8b7962007-06-09 23:10:04 +0200[diff] [blame]528 args += ret;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]529 }
530
531 return expr;
532
533 out_free_pattern:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]534 pattern_free(pattern);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]535 out_free_expr:
536 prune_acl_expr(expr);
537 free(expr);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]538 free(ckw);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]539 out_return:
540 return NULL;
541}
542
Krzysztof Piotr Oledzkia643baf2008-05-29 23:53:44 +0200[diff] [blame]543/* Purge everything in the acl <acl>, then return <acl>. */
544struct acl *prune_acl(struct acl *acl) {
545
546 struct acl_expr *expr, *exprb;
547
548 free(acl->name);
549
550 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
551 LIST_DEL(&expr->list);
552 prune_acl_expr(expr);
553 free(expr);
554 }
555
556 return acl;
557}
558
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]559/* Parse an ACL with the name starting at <args>[0], and with a list of already
560 * 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]561 * 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]562 * an anonymous one and it won't be merged with any other one. If <err> is not
563 * NULL, it will be filled with an appropriate error. This pointer must be
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]564 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
565 * dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]566 *
567 * args syntax: <aclname> <acl_expr>
568 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]569struct 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]570{
571 __label__ out_return, out_free_acl_expr, out_free_name;
572 struct acl *cur_acl;
573 struct acl_expr *acl_expr;
574 char *name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]575 const char *pos;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]576
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]577 if (**args && (pos = invalid_char(*args))) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]578 memprintf(err, "invalid character in ACL name : '%c'", *pos);
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]579 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]580 }
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]581
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]582 acl_expr = parse_acl_expr(args + 1, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]583 if (!acl_expr) {
584 /* parse_acl_expr will have filled <err> here */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]585 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]586 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]587
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]588 /* Check for args beginning with an opening parenthesis just after the
589 * subject, as this is almost certainly a typo. Right now we can only
590 * emit a warning, so let's do so.
591 */
Krzysztof Piotr Oledzki4cdd8312009-10-05 00:23:35 +0200[diff] [blame]592 if (!strchr(args[1], '(') && *args[2] == '(')
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]593 Warning("parsing acl '%s' :\n"
594 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
595 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
596 " If you are really sure this is not an error, please insert '--' between the\n"
597 " match and the pattern to make this warning message disappear.\n",
598 args[0], args[1], args[2]);
599
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]600 if (*args[0])
601 cur_acl = find_acl_by_name(args[0], known_acl);
602 else
603 cur_acl = NULL;
604
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]605 if (!cur_acl) {
606 name = strdup(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]607 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]608 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]609 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]610 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]611 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]612 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]613 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]614 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]615 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]616
617 LIST_INIT(&cur_acl->expr);
618 LIST_ADDQ(known_acl, &cur_acl->list);
619 cur_acl->name = name;
620 }
621
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]622 /* We want to know what features the ACL needs (typically HTTP parsing),
623 * and where it may be used. If an ACL relies on multiple matches, it is
624 * OK if at least one of them may match in the context where it is used.
625 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]626 cur_acl->use |= acl_expr->smp->fetch->use;
627 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]628 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
629 return cur_acl;
630
631 out_free_name:
632 free(name);
633 out_free_acl_expr:
634 prune_acl_expr(acl_expr);
635 free(acl_expr);
636 out_return:
637 return NULL;
638}
639
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]640/* Some useful ACLs provided by default. Only those used are allocated. */
641
642const struct {
643 const char *name;
644 const char *expr[4]; /* put enough for longest expression */
645} default_acl_list[] = {
Willy Tarreau58393e12008-07-20 10:39:22 +0200[diff] [blame]646 { .name = "TRUE", .expr = {"always_true",""}},
647 { .name = "FALSE", .expr = {"always_false",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]648 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]649 { .name = "HTTP", .expr = {"req_proto_http",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]650 { .name = "HTTP_1.0", .expr = {"req_ver","1.0",""}},
651 { .name = "HTTP_1.1", .expr = {"req_ver","1.1",""}},
652 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
653 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
654 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
655 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
656 { .name = "METH_POST", .expr = {"method","POST",""}},
657 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
658 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
659 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
660 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
661 { .name = "HTTP_CONTENT", .expr = {"hdr_val(content-length)","gt","0",""}},
Emeric Brunbede3d02009-06-30 17:54:00 +0200[diff] [blame]662 { .name = "RDP_COOKIE", .expr = {"req_rdp_cookie_cnt","gt","0",""}},
Willy Tarreauc6317702008-07-20 09:29:50 +0200[diff] [blame]663 { .name = "REQ_CONTENT", .expr = {"req_len","gt","0",""}},
Willy Tarreaub6fb4202008-07-20 11:18:28 +0200[diff] [blame]664 { .name = "WAIT_END", .expr = {"wait_end",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]665 { .name = NULL, .expr = {""}}
666};
667
668/* Find a default ACL from the default_acl list, compile it and return it.
669 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
670 * except when default ACLs are broken, in which case it will return NULL.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]671 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
672 * 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]673 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
674 * to report missing dependencies.
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]675 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]676static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
677 char **err, struct arg_list *al)
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]678{
679 __label__ out_return, out_free_acl_expr, out_free_name;
680 struct acl *cur_acl;
681 struct acl_expr *acl_expr;
682 char *name;
683 int index;
684
685 for (index = 0; default_acl_list[index].name != NULL; index++) {
686 if (strcmp(acl_name, default_acl_list[index].name) == 0)
687 break;
688 }
689
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]690 if (default_acl_list[index].name == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]691 memprintf(err, "no such ACL : '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]692 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]693 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]694
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]695 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]696 if (!acl_expr) {
697 /* parse_acl_expr must have filled err here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]698 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]699 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]700
701 name = strdup(acl_name);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]702 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]703 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]704 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]705 }
706
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]707 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]708 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]709 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]710 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]711 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]712
713 cur_acl->name = name;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]714 cur_acl->use |= acl_expr->smp->fetch->use;
715 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]716 LIST_INIT(&cur_acl->expr);
717 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
718 if (known_acl)
719 LIST_ADDQ(known_acl, &cur_acl->list);
720
721 return cur_acl;
722
723 out_free_name:
724 free(name);
725 out_free_acl_expr:
726 prune_acl_expr(acl_expr);
727 free(acl_expr);
728 out_return:
729 return NULL;
730}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]731
732/* Purge everything in the acl_cond <cond>, then return <cond>. */
733struct acl_cond *prune_acl_cond(struct acl_cond *cond)
734{
735 struct acl_term_suite *suite, *tmp_suite;
736 struct acl_term *term, *tmp_term;
737
738 /* iterate through all term suites and free all terms and all suites */
739 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
740 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
741 free(term);
742 free(suite);
743 }
744 return cond;
745}
746
747/* Parse an ACL condition starting at <args>[0], relying on a list of already
748 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]749 * case of low memory). Supports multiple conditions separated by "or". If
750 * <err> is not NULL, it will be filled with a pointer to an error message in
751 * case of error, that the caller is responsible for freeing. The initial
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]752 * location must either be freeable or NULL. The list <al> serves as a list head
753 * for unresolved dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]754 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]755struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]756 enum acl_cond_pol pol, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]757{
758 __label__ out_return, out_free_suite, out_free_term;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]759 int arg, neg;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]760 const char *word;
761 struct acl *cur_acl;
762 struct acl_term *cur_term;
763 struct acl_term_suite *cur_suite;
764 struct acl_cond *cond;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]765 unsigned int suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]766
767 cond = (struct acl_cond *)calloc(1, sizeof(*cond));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]768 if (cond == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]769 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]770 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]771 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]772
773 LIST_INIT(&cond->list);
774 LIST_INIT(&cond->suites);
775 cond->pol = pol;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]776 cond->val = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]777
778 cur_suite = NULL;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]779 suite_val = ~0U;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]780 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]781 for (arg = 0; *args[arg]; arg++) {
782 word = args[arg];
783
784 /* remove as many exclamation marks as we can */
785 while (*word == '!') {
786 neg = !neg;
787 word++;
788 }
789
790 /* an empty word is allowed because we cannot force the user to
791 * always think about not leaving exclamation marks alone.
792 */
793 if (!*word)
794 continue;
795
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]796 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]797 /* new term suite */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]798 cond->val |= suite_val;
799 suite_val = ~0U;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]800 cur_suite = NULL;
801 neg = 0;
802 continue;
803 }
804
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]805 if (strcmp(word, "{") == 0) {
806 /* we may have a complete ACL expression between two braces,
807 * find the last one.
808 */
809 int arg_end = arg + 1;
810 const char **args_new;
811
812 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
813 arg_end++;
814
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]815 if (!*args[arg_end]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]816 memprintf(err, "missing closing '}' in condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]817 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]818 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]819
820 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]821 if (!args_new) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]822 memprintf(err, "out of memory when parsing condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]823 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]824 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]825
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]826 args_new[0] = "";
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]827 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
828 args_new[arg_end - arg] = "";
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]829 cur_acl = parse_acl(args_new, known_acl, err, al);
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]830 free(args_new);
831
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]832 if (!cur_acl) {
833 /* note that parse_acl() must have filled <err> here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]834 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]835 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]836 word = args[arg + 1];
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]837 arg = arg_end;
838 }
839 else {
840 /* search for <word> in the known ACL names. If we do not find
841 * it, let's look for it in the default ACLs, and if found, add
842 * it to the list of ACLs of this proxy. This makes it possible
843 * to override them.
844 */
845 cur_acl = find_acl_by_name(word, known_acl);
846 if (cur_acl == NULL) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]847 cur_acl = find_acl_default(word, known_acl, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]848 if (cur_acl == NULL) {
849 /* note that find_acl_default() must have filled <err> here */
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]850 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]851 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]852 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]853 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]854
855 cur_term = (struct acl_term *)calloc(1, sizeof(*cur_term));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]856 if (cur_term == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]857 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]858 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]859 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]860
861 cur_term->acl = cur_acl;
862 cur_term->neg = neg;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]863
864 /* Here it is a bit complex. The acl_term_suite is a conjunction
865 * of many terms. It may only be used if all of its terms are
866 * usable at the same time. So the suite's validity domain is an
867 * AND between all ACL keywords' ones. But, the global condition
868 * is valid if at least one term suite is OK. So it's an OR between
869 * all of their validity domains. We could emit a warning as soon
870 * as suite_val is null because it means that the last ACL is not
871 * compatible with the previous ones. Let's remain simple for now.
872 */
873 cond->use |= cur_acl->use;
874 suite_val &= cur_acl->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]875
876 if (!cur_suite) {
877 cur_suite = (struct acl_term_suite *)calloc(1, sizeof(*cur_suite));
Willy Tarreauf678b7f2013-01-24 00:25:39 +0100[diff] [blame]878 if (cur_suite == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]879 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]880 goto out_free_term;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]881 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]882 LIST_INIT(&cur_suite->terms);
883 LIST_ADDQ(&cond->suites, &cur_suite->list);
884 }
885 LIST_ADDQ(&cur_suite->terms, &cur_term->list);
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]886 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]887 }
888
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]889 cond->val |= suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]890 return cond;
891
892 out_free_term:
893 free(cur_term);
894 out_free_suite:
895 prune_acl_cond(cond);
896 free(cond);
897 out_return:
898 return NULL;
899}
900
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]901/* Builds an ACL condition starting at the if/unless keyword. The complete
902 * condition is returned. NULL is returned in case of error or if the first
903 * word is neither "if" nor "unless". It automatically sets the file name and
Willy Tarreau25320b22013-03-24 07:22:08 +0100[diff] [blame]904 * the line number in the condition for better error reporting, and sets the
905 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]906 * be filled with a pointer to an error message in case of error, that the
907 * caller is responsible for freeing. The initial location must either be
908 * freeable or NULL.
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]909 */
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]910struct 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]911{
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]912 enum acl_cond_pol pol = ACL_COND_NONE;
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]913 struct acl_cond *cond = NULL;
914
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]915 if (err)
916 *err = NULL;
917
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]918 if (!strcmp(*args, "if")) {
919 pol = ACL_COND_IF;
920 args++;
921 }
922 else if (!strcmp(*args, "unless")) {
923 pol = ACL_COND_UNLESS;
924 args++;
925 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]926 else {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]927 memprintf(err, "conditions must start with either 'if' or 'unless'");
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]928 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]929 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]930
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]931 cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]932 if (!cond) {
933 /* note that parse_acl_cond must have filled <err> here */
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]934 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]935 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]936
937 cond->file = file;
938 cond->line = line;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]939 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]940 return cond;
941}
942
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]943/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
944 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]945 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]946 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
947 * function only computes the condition, it does not apply the polarity required
948 * 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]949 *
950 * res = acl_pass(res);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]951 * if (res == ACL_TEST_MISS)
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]952 * return 0;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]953 * if (cond->pol == ACL_COND_UNLESS)
954 * res = !res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]955 */
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]956enum 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]957{
958 __label__ fetch_next;
959 struct acl_term_suite *suite;
960 struct acl_term *term;
961 struct acl_expr *expr;
962 struct acl *acl;
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]963 struct sample smp;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]964 enum acl_test_res acl_res, suite_res, cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]965
Willy Tarreau7a777ed2012-04-26 11:44:02 +0200[diff] [blame]966 /* ACLs are iterated over all values, so let's always set the flag to
967 * indicate this to the fetch functions.
968 */
969 opt |= SMP_OPT_ITERATE;
970
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]971 /* We're doing a logical OR between conditions so we initialize to FAIL.
972 * The MISS status is propagated down from the suites.
973 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]974 cond_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]975 list_for_each_entry(suite, &cond->suites, list) {
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]976 /* Evaluate condition suite <suite>. We stop at the first term
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]977 * which returns ACL_TEST_FAIL. The MISS status is still propagated
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]978 * in case of uncertainty in the result.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]979 */
980
981 /* we're doing a logical AND between terms, so we must set the
982 * initial value to PASS.
983 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]984 suite_res = ACL_TEST_PASS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]985 list_for_each_entry(term, &suite->terms, list) {
986 acl = term->acl;
987
988 /* FIXME: use cache !
989 * check acl->cache_idx for this.
990 */
991
992 /* ACL result not cached. Let's scan all the expressions
993 * and use the first one to match.
994 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]995 acl_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]996 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]997 /* we need to reset context and flags */
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]998 memset(&smp, 0, sizeof(smp));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]999 fetch_next:
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1000 if (!sample_process(px, l4, l7, opt, expr->smp, &smp)) {
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1001 /* maybe we could not fetch because of missing data */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1002 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1003 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1004 continue;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1005 }
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]1006
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1007 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, NULL));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1008 /*
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1009 * OK now acl_res holds the result of this expression
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1010 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1011 *
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1012 * Then if (!MISS) we can cache the result, and put
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1013 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1014 *
1015 * FIXME: implement cache.
1016 *
1017 */
1018
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1019 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1020 if (acl_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1021 break;
1022
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1023 if (smp.flags & SMP_F_NOT_LAST)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1024 goto fetch_next;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1025
1026 /* sometimes we know the fetched data is subject to change
1027 * later and give another chance for a new match (eg: request
1028 * size, time, ...)
1029 */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1030 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1031 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1032 }
1033 /*
1034 * Here we have the result of an ACL (cached or not).
1035 * ACLs are combined, negated or not, to form conditions.
1036 */
1037
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1038 if (term->neg)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1039 acl_res = acl_neg(acl_res);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1040
1041 suite_res &= acl_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1042
Willy Tarreau79c412b2013-10-30 19:30:32 +0100[diff] [blame]1043 /* we're ANDing these terms, so a single FAIL or MISS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1044 if (suite_res != ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1045 break;
1046 }
1047 cond_res |= suite_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1048
1049 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1050 if (cond_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1051 break;
1052 }
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1053 return cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1054}
1055
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1056/* Returns a pointer to the first ACL conflicting with usage at place <where>
1057 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
1058 * no conflict is found. Only full conflicts are detected (ACL is not usable).
1059 * Use the next function to check for useless keywords.
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1060 */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1061const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1062{
1063 struct acl_term_suite *suite;
1064 struct acl_term *term;
1065 struct acl *acl;
1066
1067 list_for_each_entry(suite, &cond->suites, list) {
1068 list_for_each_entry(term, &suite->terms, list) {
1069 acl = term->acl;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1070 if (!(acl->val & where))
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1071 return acl;
1072 }
1073 }
1074 return NULL;
1075}
1076
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1077/* Returns a pointer to the first ACL and its first keyword to conflict with
1078 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
1079 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
1080 * null), or false if not conflict is found. The first useless keyword is
1081 * returned.
1082 */
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1083int 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]1084{
1085 struct acl_term_suite *suite;
1086 struct acl_term *term;
1087 struct acl_expr *expr;
1088
1089 list_for_each_entry(suite, &cond->suites, list) {
1090 list_for_each_entry(term, &suite->terms, list) {
1091 list_for_each_entry(expr, &term->acl->expr, list) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1092 if (!(expr->smp->fetch->val & where)) {
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1093 if (acl)
1094 *acl = term->acl;
1095 if (kw)
1096 *kw = expr->kw;
1097 return 1;
1098 }
1099 }
1100 }
1101 }
1102 return 0;
1103}
1104
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1105/*
1106 * Find targets for userlist and groups in acl. Function returns the number
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1107 * of errors or OK if everything is fine. It must be called only once sample
1108 * fetch arguments have been resolved (after smp_resolve_args()).
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1109 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1110int acl_find_targets(struct proxy *p)
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1111{
1112
1113 struct acl *acl;
1114 struct acl_expr *expr;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1115 struct pattern *pattern;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1116 int cfgerr = 0;
1117
1118 list_for_each_entry(acl, &p->acl, list) {
1119 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1120 if (!strcmp(expr->kw, "http_auth_group")) {
1121 /* Note: the ARGT_USR argument may only have been resolved earlier
1122 * by smp_resolve_args().
1123 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1124 if (expr->smp->arg_p->unresolved) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1125 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]1126 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]1127 cfgerr++;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]1128 continue;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1129 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1130
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1131 if (LIST_ISEMPTY(&expr->pat.patterns)) {
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1132 Alert("proxy %s: acl %s %s(): no groups specified.\n",
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1133 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1134 cfgerr++;
1135 continue;
1136 }
1137
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1138 list_for_each_entry(pattern, &expr->pat.patterns, list) {
Willy Tarreau7d1df412012-11-23 23:47:36 +0100[diff] [blame]1139 /* this keyword only has one argument */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1140 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]1141
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1142 if (!pattern->val.group_mask) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1143 Alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
1144 p->id, acl->name, expr->kw, pattern->ptr.str);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1145 cfgerr++;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1146 }
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1147 free(pattern->ptr.str);
1148 pattern->ptr.str = NULL;
1149 pattern->len = 0;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1150 }
1151 }
1152 }
1153 }
1154
1155 return cfgerr;
1156}
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1157
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]1158/* initializes ACLs by resolving the sample fetch names they rely upon.
1159 * Returns 0 on success, otherwise an error.
1160 */
1161int init_acl()
1162{
1163 int err = 0;
1164 int index;
1165 const char *name;
1166 struct acl_kw_list *kwl;
1167 struct sample_fetch *smp;
1168
1169 list_for_each_entry(kwl, &acl_keywords.list, list) {
1170 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1171 name = kwl->kw[index].fetch_kw;
1172 if (!name)
1173 name = kwl->kw[index].kw;
1174
1175 smp = find_sample_fetch(name, strlen(name));
1176 if (!smp) {
1177 Alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1178 kwl->kw[index].kw, name);
1179 err++;
1180 continue;
1181 }
1182 kwl->kw[index].smp = smp;
1183 }
1184 }
1185 return err;
1186}
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1187
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1188/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1189/* All supported sample and ACL keywords must be declared here. */
1190/************************************************************************/
1191
1192/* Note: must not be declared <const> as its list will be overwritten.
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]1193 * Please take care of keeping this list alphabetically sorted.
1194 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200[diff] [blame]1195static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1196 { /* END */ },
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1197}};
1198
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1199__attribute__((constructor))
1200static void __acl_init(void)
1201{
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1202 acl_register_keywords(&acl_kws);
1203}
1204
1205
1206/*
1207 * Local variables:
1208 * c-indent-level: 8
1209 * c-basic-offset: 8
1210 * End:
1211 */