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git01.mediatek.com / haproxy / 972028fa673c949bc2089cea384ac9dbdd0ce76c / . / src / acl.c
blob: 2a3756cbcc5bbea2e2485d4184e4a2babc068c2c [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
Willy Tarreau4bfa4222013-12-16 22:01:06 +0100[diff] [blame]79 * <kw> contains an opening parenthesis or a comma, only the left part of it is
80 * checked.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]81 */
82struct acl_keyword *find_acl_kw(const char *kw)
83{
84 int index;
85 const char *kwend;
86 struct acl_kw_list *kwl;
87
Willy Tarreau4bfa4222013-12-16 22:01:06 +0100[diff] [blame]88 kwend = kw;
89 while (*kwend && *kwend != '(' && *kwend != ',')
90 kwend++;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]91
92 list_for_each_entry(kwl, &acl_keywords.list, list) {
93 for (index = 0; kwl->kw[index].kw != NULL; index++) {
94 if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
95 kwl->kw[index].kw[kwend-kw] == 0)
96 return &kwl->kw[index];
97 }
98 }
99 return NULL;
100}
101
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]102static struct acl_expr *prune_acl_expr(struct acl_expr *expr)
103{
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]104 struct arg *arg;
105
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]106 pattern_prune_expr(&expr->pat);
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]107
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]108 for (arg = expr->smp->arg_p; arg; arg++) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]109 if (arg->type == ARGT_STOP)
110 break;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]111 if (arg->type == ARGT_STR || arg->unresolved) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]112 free(arg->data.str.str);
113 arg->data.str.str = NULL;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]114 arg->unresolved = 0;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]115 }
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]116 }
117
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]118 if (expr->smp->arg_p != empty_arg_list)
119 free(expr->smp->arg_p);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]120 return expr;
121}
122
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]123/* Parse an ACL expression starting at <args>[0], and return it. If <err> is
124 * not NULL, it will be filled with a pointer to an error message in case of
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]125 * error. This pointer must be freeable or NULL. <al> is an arg_list serving
126 * as a list head to report missing dependencies.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]127 *
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]128 * Right now, the only accepted syntax is :
129 * <subject> [<value>...]
130 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]131struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]132{
133 __label__ out_return, out_free_expr, out_free_pattern;
134 struct acl_expr *expr;
135 struct acl_keyword *aclkw;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]136 struct pattern *pattern;
Thierry FOURNIER7148ce62013-12-06 19:06:43 +0100[diff] [blame]137 int patflags;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]138 const char *arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]139 struct sample_expr *smp = NULL;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]140 int idx = 0;
141 char *ckw = NULL;
142 const char *begw;
143 const char *endw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]144 const char *endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]145 unsigned long prev_type;
146 int cur_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]147 int nbargs;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]148 int operator = STD_OP_EQ;
149 int op;
150 int contain_colon, have_dot;
151 const char *dot;
152 signed long long value, minor;
153 /* The following buffer contain two numbers, a ':' separator and the final \0. */
154 char buffer[NB_LLMAX_STR + 1 + NB_LLMAX_STR + 1];
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]155
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]156 /* First, we look for an ACL keyword. And if we don't find one, then
157 * we look for a sample fetch expression starting with a sample fetch
158 * keyword.
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]159 */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]160
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]161 al->ctx = ARGC_ACL; // to report errors while resolving args late
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]162 al->kw = *args;
163 al->conv = NULL;
164
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]165 aclkw = find_acl_kw(args[0]);
Willy Tarreau20490922014-03-17 18:04:27 +0100[diff] [blame]166 if (aclkw) {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]167 /* OK we have a real ACL keyword */
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]168
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]169 /* build new sample expression for this ACL */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]170 smp = calloc(1, sizeof(struct sample_expr));
171 if (!smp) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]172 memprintf(err, "out of memory when parsing ACL expression");
173 goto out_return;
174 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]175 LIST_INIT(&(smp->conv_exprs));
176 smp->fetch = aclkw->smp;
177 smp->arg_p = empty_arg_list;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]178
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]179 /* look for the begining of the subject arguments */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]180 for (arg = args[0]; *arg && *arg != '(' && *arg != ','; arg++);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]181
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]182 endt = arg;
183 if (*endt == '(') {
184 /* look for the end of this term and skip the opening parenthesis */
185 endt = ++arg;
186 while (*endt && *endt != ')')
187 endt++;
188 if (*endt != ')') {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]189 memprintf(err, "missing closing ')' after arguments to ACL keyword '%s'", aclkw->kw);
190 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]191 }
192 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]193
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]194 /* At this point, we have :
195 * - args[0] : beginning of the keyword
196 * - arg : end of the keyword, first character not part of keyword
197 * nor the opening parenthesis (so first character of args
198 * if present).
199 * - endt : end of the term (=arg or last parenthesis if args are present)
200 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]201 nbargs = make_arg_list(arg, endt - arg, smp->fetch->arg_mask, &smp->arg_p,
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]202 err, NULL, NULL, al);
203 if (nbargs < 0) {
204 /* note that make_arg_list will have set <err> here */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]205 memprintf(err, "ACL keyword '%s' : %s", aclkw->kw, *err);
206 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]207 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]208
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]209 if (!smp->arg_p) {
210 smp->arg_p = empty_arg_list;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]211 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]212 else if (smp->fetch->val_args && !smp->fetch->val_args(smp->arg_p, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]213 /* invalid keyword argument, error must have been
214 * set by val_args().
215 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]216 memprintf(err, "in argument to '%s', %s", aclkw->kw, *err);
217 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]218 }
219 arg = endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]220
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]221 /* look for the begining of the converters list. Those directly attached
222 * to the ACL keyword are found just after <arg> which points to the comma.
223 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]224 prev_type = smp->fetch->out_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]225 while (*arg) {
226 struct sample_conv *conv;
227 struct sample_conv_expr *conv_expr;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]228
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]229 if (*arg == ')') /* skip last closing parenthesis */
230 arg++;
231
232 if (*arg && *arg != ',') {
233 if (ckw)
234 memprintf(err, "ACL keyword '%s' : missing comma after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]235 aclkw->kw, ckw);
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]236 else
237 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]238 aclkw->kw);
239 goto out_free_smp;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]240 }
Willy Tarreauae52f062012-04-26 12:13:35 +0200[diff] [blame]241
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]242 while (*arg == ',') /* then trailing commas */
243 arg++;
Willy Tarreau2e845be2012-10-19 19:49:09 +0200[diff] [blame]244
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]245 begw = arg; /* start of conv keyword */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]246
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]247 if (!*begw)
248 /* none ? end of converters */
249 break;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]250
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]251 for (endw = begw; *endw && *endw != '(' && *endw != ','; endw++);
Willy Tarreau9ca69362013-10-22 19:10:06 +0200[diff] [blame]252
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]253 free(ckw);
254 ckw = my_strndup(begw, endw - begw);
Willy Tarreauf75d0082013-04-07 21:20:44 +0200[diff] [blame]255
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]256 conv = find_sample_conv(begw, endw - begw);
257 if (!conv) {
258 /* Unknown converter method */
259 memprintf(err, "ACL keyword '%s' : unknown conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]260 aclkw->kw, ckw);
261 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]262 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]263
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]264 arg = endw;
265 if (*arg == '(') {
266 /* look for the end of this term */
267 while (*arg && *arg != ')')
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]268 arg++;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]269 if (*arg != ')') {
270 memprintf(err, "ACL keyword '%s' : syntax error: missing ')' after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]271 aclkw->kw, ckw);
272 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]273 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]274 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]275
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]276 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
277 memprintf(err, "ACL keyword '%s' : returns type of conv method '%s' is unknown.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]278 aclkw->kw, ckw);
279 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]280 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]281
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]282 /* If impossible type conversion */
283 if (!sample_casts[prev_type][conv->in_type]) {
284 memprintf(err, "ACL keyword '%s' : conv method '%s' cannot be applied.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]285 aclkw->kw, ckw);
286 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]287 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]288
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]289 prev_type = conv->out_type;
290 conv_expr = calloc(1, sizeof(struct sample_conv_expr));
291 if (!conv_expr)
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]292 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]293
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]294 LIST_ADDQ(&(smp->conv_exprs), &(conv_expr->list));
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]295 conv_expr->conv = conv;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]296
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]297 if (arg != endw) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]298 int err_arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]299
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]300 if (!conv->arg_mask) {
301 memprintf(err, "ACL keyword '%s' : conv method '%s' does not support any args.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]302 aclkw->kw, ckw);
303 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]304 }
305
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]306 al->kw = smp->fetch->kw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]307 al->conv = conv_expr->conv->kw;
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]308 if (make_arg_list(endw + 1, arg - endw - 1, conv->arg_mask, &conv_expr->arg_p, err, NULL, &err_arg, al) < 0) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]309 memprintf(err, "ACL keyword '%s' : invalid arg %d in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]310 aclkw->kw, err_arg+1, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]311 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]312 }
313
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]314 if (!conv_expr->arg_p)
315 conv_expr->arg_p = empty_arg_list;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]316
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]317 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]318 memprintf(err, "ACL keyword '%s' : invalid args in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]319 aclkw->kw, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]320 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]321 }
322 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]323 else if (ARGM(conv->arg_mask)) {
324 memprintf(err, "ACL keyword '%s' : missing args for conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]325 aclkw->kw, ckw);
326 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]327 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]328 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]329 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]330 else {
331 /* This is not an ACL keyword, so we hope this is a sample fetch
332 * keyword that we're going to transparently use as an ACL. If
333 * so, we retrieve a completely parsed expression with args and
334 * convs already done.
335 */
336 smp = sample_parse_expr((char **)args, &idx, err, al);
337 if (!smp) {
338 memprintf(err, "%s in ACL expression '%s'", *err, *args);
339 goto out_return;
340 }
341 }
342
343 expr = (struct acl_expr *)calloc(1, sizeof(*expr));
344 if (!expr) {
345 memprintf(err, "out of memory when parsing ACL expression");
346 goto out_return;
347 }
348
349 pattern_init_expr(&expr->pat);
350
351 expr->kw = aclkw ? aclkw->kw : smp->fetch->kw;
352 expr->pat.parse = aclkw ? aclkw->parse : NULL;
353 expr->pat.match = aclkw ? aclkw->match : NULL;
354 expr->smp = smp;
355 smp = NULL;
356
357 if (!expr->pat.parse) {
358 /* some types can be automatically converted */
359
360 switch (expr->smp ? expr->smp->fetch->out_type : aclkw->smp->out_type) {
361 case SMP_T_BOOL:
362 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
363 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
364 break;
365 case SMP_T_SINT:
366 case SMP_T_UINT:
367 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
368 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
369 break;
370 case SMP_T_IPV4:
371 case SMP_T_IPV6:
372 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
373 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
374 break;
375 }
376 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]377
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]378 /* Additional check to protect against common mistakes */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]379 cur_type = smp_expr_output_type(expr->smp);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]380 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]381 Warning("parsing acl keyword '%s' :\n"
382 " no pattern to match against were provided, so this ACL will never match.\n"
383 " If this is what you intended, please add '--' to get rid of this warning.\n"
384 " If you intended to match only for existence, please use '-m found'.\n"
385 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
386 "\n",
387 args[0]);
388 }
389
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]390 args++;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]391
392 /* check for options before patterns. Supported options are :
393 * -i : ignore case for all patterns by default
394 * -f : read patterns from those files
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]395 * -m : force matching method (must be used before -f)
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]396 * -- : everything after this is not an option
397 */
398 patflags = 0;
399 while (**args == '-') {
400 if ((*args)[1] == 'i')
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]401 patflags |= PAT_F_IGNORE_CASE;
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]402 else if ((*args)[1] == 'f') {
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]403 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]404 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]405 goto out_free_expr;
406 }
407
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]408 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]409 goto out_free_expr;
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]410 args++;
411 }
412 else if ((*args)[1] == 'm') {
413 int idx;
414
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]415 if (!LIST_ISEMPTY(&expr->pat.patterns) || !eb_is_empty(&expr->pat.pattern_tree)) {
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]416 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
417 goto out_free_expr;
418 }
419
Willy Tarreau6f8fe312013-11-28 22:24:25 +0100[diff] [blame]420 idx = pat_find_match_name(args[1]);
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]421 if (idx < 0) {
422 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
423 goto out_free_expr;
424 }
425
426 /* Note: -m found is always valid, bool/int are compatible, str/bin/reg/len are compatible */
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]427 if (!sample_casts[cur_type][pat_match_types[idx]]) {
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]428 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]429 goto out_free_expr;
430 }
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]431 expr->pat.parse = pat_parse_fcts[idx];
432 expr->pat.match = pat_match_fcts[idx];
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]433 args++;
434 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]435 else if ((*args)[1] == '-') {
436 args++;
437 break;
438 }
439 else
440 break;
441 args++;
442 }
443
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]444 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]445 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]446 goto out_free_expr;
447 }
448
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]449 /* now parse all patterns */
Thierry FOURNIER7148ce62013-12-06 19:06:43 +0100[diff] [blame]450 pattern = NULL;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]451 while (**args) {
452 arg = *args;
453
454 /* Compatibility layer. Each pattern can parse only one string per pattern,
455 * but the pat_parser_int() and pat_parse_dotted_ver() parsers were need
456 * optionnaly two operators. The first operator is the match method: eq,
457 * le, lt, ge and gt. pat_parse_int() and pat_parse_dotted_ver() functions
458 * can have a compatibility syntax based on ranges:
459 *
460 * pat_parse_int():
461 *
462 * "eq x" -> "x" or "x:x"
463 * "le x" -> ":x"
464 * "lt x" -> ":y" (with y = x - 1)
465 * "ge x" -> "x:"
466 * "gt x" -> "y:" (with y = x + 1)
467 *
468 * pat_parse_dotted_ver():
469 *
470 * "eq x.y" -> "x.y" or "x.y:x.y"
471 * "le x.y" -> ":x.y"
472 * "lt x.y" -> ":w.z" (with w.z = x.y - 1)
473 * "ge x.y" -> "x.y:"
474 * "gt x.y" -> "w.z:" (with w.z = x.y + 1)
475 *
476 * If y is not present, assume that is "0".
477 *
478 * The syntax eq, le, lt, ge and gt are proper to the acl syntax. The
479 * following block of code detect the operator, and rewrite each value
480 * in parsable string.
481 */
482 if (expr->pat.parse == pat_parse_int ||
483 expr->pat.parse == pat_parse_dotted_ver) {
484 /* Check for operator. If the argument is operator, memorise it and
485 * continue to the next argument.
486 */
487 op = get_std_op(arg);
488 if (op != -1) {
489 operator = op;
490 args++;
491 continue;
492 }
493
494 /* Check if the pattern contain ':' or '-' character. */
495 contain_colon = (strchr(arg, ':') || strchr(arg, '-'));
496
497 /* If the pattern contain ':' or '-' character, give it to the parser as is.
498 * If no contain ':' and operator is STD_OP_EQ, give it to the parser as is.
499 * In other case, try to convert the value according with the operator.
500 */
501 if (!contain_colon && operator != STD_OP_EQ) {
502 /* Search '.' separator. */
503 dot = strchr(arg, '.');
504 if (!dot) {
505 have_dot = 0;
506 minor = 0;
507 dot = arg + strlen(arg);
508 }
509 else
510 have_dot = 1;
511
512 /* convert the integer minor part for the pat_parse_dotted_ver() function. */
513 if (expr->pat.parse == pat_parse_dotted_ver && have_dot) {
514 if (strl2llrc(dot+1, strlen(dot+1), &minor) != 0) {
515 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
516 goto out_free_pattern;
517 }
518 if (minor >= 65536) {
519 memprintf(err, "'%s' contains too large a minor value", arg);
520 goto out_free_pattern;
521 }
522 }
523
524 /* convert the integer value for the pat_parse_int() function, and the
525 * integer major part for the pat_parse_dotted_ver() function.
526 */
527 if (strl2llrc(arg, dot - arg, &value) != 0) {
528 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
529 goto out_free_pattern;
530 }
531 if (expr->pat.parse == pat_parse_dotted_ver) {
532 if (value >= 65536) {
533 memprintf(err, "'%s' contains too large a major value", arg);
534 goto out_free_pattern;
535 }
536 value = (value << 16) | (minor & 0xffff);
537 }
538
539 switch (operator) {
540
541 case STD_OP_EQ: /* this case is not possible. */
542 memprintf(err, "internal error");
543 goto out_free_pattern;
544
545 case STD_OP_GT:
546 value++; /* gt = ge + 1 */
547
548 case STD_OP_GE:
549 if (expr->pat.parse == pat_parse_int)
550 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld:", value);
551 else
552 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld.%lld:",
553 value >> 16, value & 0xffff);
554 arg = buffer;
555 break;
556
557 case STD_OP_LT:
558 value--; /* lt = le - 1 */
559
560 case STD_OP_LE:
561 if (expr->pat.parse == pat_parse_int)
562 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld", value);
563 else
564 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld.%lld",
565 value >> 16, value & 0xffff);
566 arg = buffer;
567 break;
568 }
569 }
570 }
571
Thierry FOURNIER972028f2014-01-23 17:53:31 +0100[diff] [blame^]572 if (!pattern_register(&expr->pat, arg, NULL, &pattern, patflags, err))
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]573 goto out_free_pattern;
574 args++;
575 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]576
577 return expr;
578
579 out_free_pattern:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]580 pattern_free(pattern);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]581 out_free_expr:
582 prune_acl_expr(expr);
583 free(expr);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]584 free(ckw);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]585 out_free_smp:
586 free(smp);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]587 out_return:
588 return NULL;
589}
590
Krzysztof Piotr Oledzkia643baf2008-05-29 23:53:44 +0200[diff] [blame]591/* Purge everything in the acl <acl>, then return <acl>. */
592struct acl *prune_acl(struct acl *acl) {
593
594 struct acl_expr *expr, *exprb;
595
596 free(acl->name);
597
598 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
599 LIST_DEL(&expr->list);
600 prune_acl_expr(expr);
601 free(expr);
602 }
603
604 return acl;
605}
606
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]607/* Parse an ACL with the name starting at <args>[0], and with a list of already
608 * 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]609 * 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]610 * an anonymous one and it won't be merged with any other one. If <err> is not
611 * NULL, it will be filled with an appropriate error. This pointer must be
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]612 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
613 * dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]614 *
615 * args syntax: <aclname> <acl_expr>
616 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]617struct 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]618{
619 __label__ out_return, out_free_acl_expr, out_free_name;
620 struct acl *cur_acl;
621 struct acl_expr *acl_expr;
622 char *name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]623 const char *pos;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]624
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]625 if (**args && (pos = invalid_char(*args))) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]626 memprintf(err, "invalid character in ACL name : '%c'", *pos);
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]627 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]628 }
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]629
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]630 acl_expr = parse_acl_expr(args + 1, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]631 if (!acl_expr) {
632 /* parse_acl_expr will have filled <err> here */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]633 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]634 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]635
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]636 /* Check for args beginning with an opening parenthesis just after the
637 * subject, as this is almost certainly a typo. Right now we can only
638 * emit a warning, so let's do so.
639 */
Krzysztof Piotr Oledzki4cdd8312009-10-05 00:23:35 +0200[diff] [blame]640 if (!strchr(args[1], '(') && *args[2] == '(')
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]641 Warning("parsing acl '%s' :\n"
642 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
643 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
644 " If you are really sure this is not an error, please insert '--' between the\n"
645 " match and the pattern to make this warning message disappear.\n",
646 args[0], args[1], args[2]);
647
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]648 if (*args[0])
649 cur_acl = find_acl_by_name(args[0], known_acl);
650 else
651 cur_acl = NULL;
652
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]653 if (!cur_acl) {
654 name = strdup(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]655 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]656 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]657 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]658 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]659 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]660 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]661 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]662 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]663 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]664
665 LIST_INIT(&cur_acl->expr);
666 LIST_ADDQ(known_acl, &cur_acl->list);
667 cur_acl->name = name;
668 }
669
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]670 /* We want to know what features the ACL needs (typically HTTP parsing),
671 * and where it may be used. If an ACL relies on multiple matches, it is
672 * OK if at least one of them may match in the context where it is used.
673 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]674 cur_acl->use |= acl_expr->smp->fetch->use;
675 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]676 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
677 return cur_acl;
678
679 out_free_name:
680 free(name);
681 out_free_acl_expr:
682 prune_acl_expr(acl_expr);
683 free(acl_expr);
684 out_return:
685 return NULL;
686}
687
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]688/* Some useful ACLs provided by default. Only those used are allocated. */
689
690const struct {
691 const char *name;
692 const char *expr[4]; /* put enough for longest expression */
693} default_acl_list[] = {
Willy Tarreau58393e12008-07-20 10:39:22 +0200[diff] [blame]694 { .name = "TRUE", .expr = {"always_true",""}},
695 { .name = "FALSE", .expr = {"always_false",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]696 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]697 { .name = "HTTP", .expr = {"req_proto_http",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]698 { .name = "HTTP_1.0", .expr = {"req_ver","1.0",""}},
699 { .name = "HTTP_1.1", .expr = {"req_ver","1.1",""}},
700 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
701 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
702 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
703 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
704 { .name = "METH_POST", .expr = {"method","POST",""}},
705 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
706 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
707 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
708 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
709 { .name = "HTTP_CONTENT", .expr = {"hdr_val(content-length)","gt","0",""}},
Emeric Brunbede3d02009-06-30 17:54:00 +0200[diff] [blame]710 { .name = "RDP_COOKIE", .expr = {"req_rdp_cookie_cnt","gt","0",""}},
Willy Tarreauc6317702008-07-20 09:29:50 +0200[diff] [blame]711 { .name = "REQ_CONTENT", .expr = {"req_len","gt","0",""}},
Willy Tarreaub6fb4202008-07-20 11:18:28 +0200[diff] [blame]712 { .name = "WAIT_END", .expr = {"wait_end",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]713 { .name = NULL, .expr = {""}}
714};
715
716/* Find a default ACL from the default_acl list, compile it and return it.
717 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
718 * except when default ACLs are broken, in which case it will return NULL.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]719 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
720 * 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]721 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
722 * to report missing dependencies.
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]723 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]724static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
725 char **err, struct arg_list *al)
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]726{
727 __label__ out_return, out_free_acl_expr, out_free_name;
728 struct acl *cur_acl;
729 struct acl_expr *acl_expr;
730 char *name;
731 int index;
732
733 for (index = 0; default_acl_list[index].name != NULL; index++) {
734 if (strcmp(acl_name, default_acl_list[index].name) == 0)
735 break;
736 }
737
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]738 if (default_acl_list[index].name == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]739 memprintf(err, "no such ACL : '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]740 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]741 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]742
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]743 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]744 if (!acl_expr) {
745 /* parse_acl_expr must have filled err here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]746 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]747 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]748
749 name = strdup(acl_name);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]750 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]751 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]752 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]753 }
754
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]755 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]756 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]757 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]758 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]759 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]760
761 cur_acl->name = name;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]762 cur_acl->use |= acl_expr->smp->fetch->use;
763 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]764 LIST_INIT(&cur_acl->expr);
765 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
766 if (known_acl)
767 LIST_ADDQ(known_acl, &cur_acl->list);
768
769 return cur_acl;
770
771 out_free_name:
772 free(name);
773 out_free_acl_expr:
774 prune_acl_expr(acl_expr);
775 free(acl_expr);
776 out_return:
777 return NULL;
778}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]779
780/* Purge everything in the acl_cond <cond>, then return <cond>. */
781struct acl_cond *prune_acl_cond(struct acl_cond *cond)
782{
783 struct acl_term_suite *suite, *tmp_suite;
784 struct acl_term *term, *tmp_term;
785
786 /* iterate through all term suites and free all terms and all suites */
787 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
788 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
789 free(term);
790 free(suite);
791 }
792 return cond;
793}
794
795/* Parse an ACL condition starting at <args>[0], relying on a list of already
796 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]797 * case of low memory). Supports multiple conditions separated by "or". If
798 * <err> is not NULL, it will be filled with a pointer to an error message in
799 * case of error, that the caller is responsible for freeing. The initial
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]800 * location must either be freeable or NULL. The list <al> serves as a list head
801 * for unresolved dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]802 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]803struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]804 enum acl_cond_pol pol, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]805{
806 __label__ out_return, out_free_suite, out_free_term;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]807 int arg, neg;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]808 const char *word;
809 struct acl *cur_acl;
810 struct acl_term *cur_term;
811 struct acl_term_suite *cur_suite;
812 struct acl_cond *cond;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]813 unsigned int suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]814
815 cond = (struct acl_cond *)calloc(1, sizeof(*cond));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]816 if (cond == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]817 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]818 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]819 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]820
821 LIST_INIT(&cond->list);
822 LIST_INIT(&cond->suites);
823 cond->pol = pol;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]824 cond->val = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]825
826 cur_suite = NULL;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]827 suite_val = ~0U;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]828 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]829 for (arg = 0; *args[arg]; arg++) {
830 word = args[arg];
831
832 /* remove as many exclamation marks as we can */
833 while (*word == '!') {
834 neg = !neg;
835 word++;
836 }
837
838 /* an empty word is allowed because we cannot force the user to
839 * always think about not leaving exclamation marks alone.
840 */
841 if (!*word)
842 continue;
843
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]844 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]845 /* new term suite */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]846 cond->val |= suite_val;
847 suite_val = ~0U;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]848 cur_suite = NULL;
849 neg = 0;
850 continue;
851 }
852
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]853 if (strcmp(word, "{") == 0) {
854 /* we may have a complete ACL expression between two braces,
855 * find the last one.
856 */
857 int arg_end = arg + 1;
858 const char **args_new;
859
860 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
861 arg_end++;
862
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]863 if (!*args[arg_end]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]864 memprintf(err, "missing closing '}' in condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]865 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]866 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]867
868 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]869 if (!args_new) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]870 memprintf(err, "out of memory when parsing condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]871 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]872 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]873
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]874 args_new[0] = "";
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]875 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
876 args_new[arg_end - arg] = "";
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]877 cur_acl = parse_acl(args_new, known_acl, err, al);
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]878 free(args_new);
879
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]880 if (!cur_acl) {
881 /* note that parse_acl() must have filled <err> here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]882 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]883 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]884 word = args[arg + 1];
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]885 arg = arg_end;
886 }
887 else {
888 /* search for <word> in the known ACL names. If we do not find
889 * it, let's look for it in the default ACLs, and if found, add
890 * it to the list of ACLs of this proxy. This makes it possible
891 * to override them.
892 */
893 cur_acl = find_acl_by_name(word, known_acl);
894 if (cur_acl == NULL) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]895 cur_acl = find_acl_default(word, known_acl, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]896 if (cur_acl == NULL) {
897 /* note that find_acl_default() must have filled <err> here */
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]898 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]899 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]900 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]901 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]902
903 cur_term = (struct acl_term *)calloc(1, sizeof(*cur_term));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]904 if (cur_term == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]905 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]906 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]907 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]908
909 cur_term->acl = cur_acl;
910 cur_term->neg = neg;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]911
912 /* Here it is a bit complex. The acl_term_suite is a conjunction
913 * of many terms. It may only be used if all of its terms are
914 * usable at the same time. So the suite's validity domain is an
915 * AND between all ACL keywords' ones. But, the global condition
916 * is valid if at least one term suite is OK. So it's an OR between
917 * all of their validity domains. We could emit a warning as soon
918 * as suite_val is null because it means that the last ACL is not
919 * compatible with the previous ones. Let's remain simple for now.
920 */
921 cond->use |= cur_acl->use;
922 suite_val &= cur_acl->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]923
924 if (!cur_suite) {
925 cur_suite = (struct acl_term_suite *)calloc(1, sizeof(*cur_suite));
Willy Tarreauf678b7f2013-01-24 00:25:39 +0100[diff] [blame]926 if (cur_suite == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]927 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]928 goto out_free_term;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]929 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]930 LIST_INIT(&cur_suite->terms);
931 LIST_ADDQ(&cond->suites, &cur_suite->list);
932 }
933 LIST_ADDQ(&cur_suite->terms, &cur_term->list);
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]934 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]935 }
936
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]937 cond->val |= suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]938 return cond;
939
940 out_free_term:
941 free(cur_term);
942 out_free_suite:
943 prune_acl_cond(cond);
944 free(cond);
945 out_return:
946 return NULL;
947}
948
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]949/* Builds an ACL condition starting at the if/unless keyword. The complete
950 * condition is returned. NULL is returned in case of error or if the first
951 * word is neither "if" nor "unless". It automatically sets the file name and
Willy Tarreau25320b22013-03-24 07:22:08 +0100[diff] [blame]952 * the line number in the condition for better error reporting, and sets the
953 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]954 * be filled with a pointer to an error message in case of error, that the
955 * caller is responsible for freeing. The initial location must either be
956 * freeable or NULL.
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]957 */
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]958struct 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]959{
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]960 enum acl_cond_pol pol = ACL_COND_NONE;
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]961 struct acl_cond *cond = NULL;
962
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]963 if (err)
964 *err = NULL;
965
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]966 if (!strcmp(*args, "if")) {
967 pol = ACL_COND_IF;
968 args++;
969 }
970 else if (!strcmp(*args, "unless")) {
971 pol = ACL_COND_UNLESS;
972 args++;
973 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]974 else {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]975 memprintf(err, "conditions must start with either 'if' or 'unless'");
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]976 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]977 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]978
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]979 cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]980 if (!cond) {
981 /* note that parse_acl_cond must have filled <err> here */
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]982 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]983 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]984
985 cond->file = file;
986 cond->line = line;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]987 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]988 return cond;
989}
990
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]991/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
992 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]993 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]994 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
995 * function only computes the condition, it does not apply the polarity required
996 * 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]997 *
998 * res = acl_pass(res);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]999 * if (res == ACL_TEST_MISS)
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1000 * return 0;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1001 * if (cond->pol == ACL_COND_UNLESS)
1002 * res = !res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1003 */
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1004enum 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]1005{
1006 __label__ fetch_next;
1007 struct acl_term_suite *suite;
1008 struct acl_term *term;
1009 struct acl_expr *expr;
1010 struct acl *acl;
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1011 struct sample smp;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1012 enum acl_test_res acl_res, suite_res, cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1013
Willy Tarreau7a777ed2012-04-26 11:44:02 +0200[diff] [blame]1014 /* ACLs are iterated over all values, so let's always set the flag to
1015 * indicate this to the fetch functions.
1016 */
1017 opt |= SMP_OPT_ITERATE;
1018
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1019 /* We're doing a logical OR between conditions so we initialize to FAIL.
1020 * The MISS status is propagated down from the suites.
1021 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1022 cond_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1023 list_for_each_entry(suite, &cond->suites, list) {
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1024 /* Evaluate condition suite <suite>. We stop at the first term
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1025 * which returns ACL_TEST_FAIL. The MISS status is still propagated
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1026 * in case of uncertainty in the result.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1027 */
1028
1029 /* we're doing a logical AND between terms, so we must set the
1030 * initial value to PASS.
1031 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1032 suite_res = ACL_TEST_PASS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1033 list_for_each_entry(term, &suite->terms, list) {
1034 acl = term->acl;
1035
1036 /* FIXME: use cache !
1037 * check acl->cache_idx for this.
1038 */
1039
1040 /* ACL result not cached. Let's scan all the expressions
1041 * and use the first one to match.
1042 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1043 acl_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1044 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]1045 /* we need to reset context and flags */
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1046 memset(&smp, 0, sizeof(smp));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1047 fetch_next:
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1048 if (!sample_process(px, l4, l7, opt, expr->smp, &smp)) {
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1049 /* maybe we could not fetch because of missing data */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1050 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1051 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1052 continue;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1053 }
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]1054
Thierry FOURNIER76090642013-12-10 15:03:38 +0100[diff] [blame]1055 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, NULL, NULL, NULL));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1056 /*
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1057 * OK now acl_res holds the result of this expression
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1058 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1059 *
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1060 * Then if (!MISS) we can cache the result, and put
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1061 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1062 *
1063 * FIXME: implement cache.
1064 *
1065 */
1066
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1067 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1068 if (acl_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1069 break;
1070
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1071 if (smp.flags & SMP_F_NOT_LAST)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1072 goto fetch_next;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1073
1074 /* sometimes we know the fetched data is subject to change
1075 * later and give another chance for a new match (eg: request
1076 * size, time, ...)
1077 */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1078 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1079 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1080 }
1081 /*
1082 * Here we have the result of an ACL (cached or not).
1083 * ACLs are combined, negated or not, to form conditions.
1084 */
1085
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1086 if (term->neg)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1087 acl_res = acl_neg(acl_res);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1088
1089 suite_res &= acl_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1090
Willy Tarreau79c412b2013-10-30 19:30:32 +0100[diff] [blame]1091 /* we're ANDing these terms, so a single FAIL or MISS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1092 if (suite_res != ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1093 break;
1094 }
1095 cond_res |= suite_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1096
1097 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1098 if (cond_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1099 break;
1100 }
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1101 return cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1102}
1103
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1104/* Returns a pointer to the first ACL conflicting with usage at place <where>
1105 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
1106 * no conflict is found. Only full conflicts are detected (ACL is not usable).
1107 * Use the next function to check for useless keywords.
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1108 */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1109const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1110{
1111 struct acl_term_suite *suite;
1112 struct acl_term *term;
1113 struct acl *acl;
1114
1115 list_for_each_entry(suite, &cond->suites, list) {
1116 list_for_each_entry(term, &suite->terms, list) {
1117 acl = term->acl;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1118 if (!(acl->val & where))
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1119 return acl;
1120 }
1121 }
1122 return NULL;
1123}
1124
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1125/* Returns a pointer to the first ACL and its first keyword to conflict with
1126 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
1127 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
1128 * null), or false if not conflict is found. The first useless keyword is
1129 * returned.
1130 */
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1131int 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]1132{
1133 struct acl_term_suite *suite;
1134 struct acl_term *term;
1135 struct acl_expr *expr;
1136
1137 list_for_each_entry(suite, &cond->suites, list) {
1138 list_for_each_entry(term, &suite->terms, list) {
1139 list_for_each_entry(expr, &term->acl->expr, list) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1140 if (!(expr->smp->fetch->val & where)) {
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1141 if (acl)
1142 *acl = term->acl;
1143 if (kw)
1144 *kw = expr->kw;
1145 return 1;
1146 }
1147 }
1148 }
1149 }
1150 return 0;
1151}
1152
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1153/*
1154 * Find targets for userlist and groups in acl. Function returns the number
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1155 * of errors or OK if everything is fine. It must be called only once sample
1156 * fetch arguments have been resolved (after smp_resolve_args()).
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1157 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1158int acl_find_targets(struct proxy *p)
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1159{
1160
1161 struct acl *acl;
1162 struct acl_expr *expr;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1163 struct pattern *pattern;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1164 int cfgerr = 0;
1165
1166 list_for_each_entry(acl, &p->acl, list) {
1167 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1168 if (!strcmp(expr->kw, "http_auth_group")) {
1169 /* Note: the ARGT_USR argument may only have been resolved earlier
1170 * by smp_resolve_args().
1171 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1172 if (expr->smp->arg_p->unresolved) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1173 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]1174 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]1175 cfgerr++;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]1176 continue;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1177 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1178
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1179 if (LIST_ISEMPTY(&expr->pat.patterns)) {
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1180 Alert("proxy %s: acl %s %s(): no groups specified.\n",
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1181 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1182 cfgerr++;
1183 continue;
1184 }
1185
Thierry FOURNIER9eec0a62014-01-22 18:38:02 +0100[diff] [blame]1186 /* For each pattern, check if the group exists. */
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1187 list_for_each_entry(pattern, &expr->pat.patterns, list) {
Thierry FOURNIER9eec0a62014-01-22 18:38:02 +0100[diff] [blame]1188 if (!check_group(expr->smp->arg_p->data.usr, pattern->ptr.str)) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1189 Alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
1190 p->id, acl->name, expr->kw, pattern->ptr.str);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1191 cfgerr++;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1192 }
1193 }
1194 }
1195 }
1196 }
1197
1198 return cfgerr;
1199}
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1200
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]1201/* initializes ACLs by resolving the sample fetch names they rely upon.
1202 * Returns 0 on success, otherwise an error.
1203 */
1204int init_acl()
1205{
1206 int err = 0;
1207 int index;
1208 const char *name;
1209 struct acl_kw_list *kwl;
1210 struct sample_fetch *smp;
1211
1212 list_for_each_entry(kwl, &acl_keywords.list, list) {
1213 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1214 name = kwl->kw[index].fetch_kw;
1215 if (!name)
1216 name = kwl->kw[index].kw;
1217
1218 smp = find_sample_fetch(name, strlen(name));
1219 if (!smp) {
1220 Alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1221 kwl->kw[index].kw, name);
1222 err++;
1223 continue;
1224 }
1225 kwl->kw[index].smp = smp;
1226 }
1227 }
1228 return err;
1229}
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1230
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1231/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1232/* All supported sample and ACL keywords must be declared here. */
1233/************************************************************************/
1234
1235/* Note: must not be declared <const> as its list will be overwritten.
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]1236 * Please take care of keeping this list alphabetically sorted.
1237 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200[diff] [blame]1238static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1239 { /* END */ },
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1240}};
1241
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1242__attribute__((constructor))
1243static void __acl_init(void)
1244{
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1245 acl_register_keywords(&acl_kws);
1246}
1247
1248
1249/*
1250 * Local variables:
1251 * c-indent-level: 8
1252 * c-basic-offset: 8
1253 * End:
1254 */