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git01.mediatek.com / haproxy / 5f3f15f6186d27343b9d346714ea2ad1aa9a8e46 / . / src / acl.c
blob: c4f1934888ad21253af56273364c917e07cf1e45 [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;
Thierry FOURNIER7148ce62013-12-06 19:06:43 +0100[diff] [blame]136 int 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;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]139 int idx = 0;
140 char *ckw = NULL;
141 const char *begw;
142 const char *endw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]143 const char *endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]144 unsigned long prev_type;
145 int cur_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]146 int nbargs;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]147
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]148 /* First, we look for an ACL keyword. And if we don't find one, then
149 * we look for a sample fetch expression starting with a sample fetch
150 * keyword.
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]151 */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]152
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]153 al->ctx = ARGC_ACL; // to report errors while resolving args late
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]154 al->kw = *args;
155 al->conv = NULL;
156
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]157 aclkw = find_acl_kw(args[0]);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]158 if (aclkw && aclkw->parse) {
159 /* OK we have a real ACL keyword */
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]160
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]161 /* build new sample expression for this ACL */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]162 smp = calloc(1, sizeof(struct sample_expr));
163 if (!smp) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]164 memprintf(err, "out of memory when parsing ACL expression");
165 goto out_return;
166 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]167 LIST_INIT(&(smp->conv_exprs));
168 smp->fetch = aclkw->smp;
169 smp->arg_p = empty_arg_list;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]170
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]171 /* look for the begining of the subject arguments */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]172 for (arg = args[0]; *arg && *arg != '(' && *arg != ','; arg++);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]173
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]174 endt = arg;
175 if (*endt == '(') {
176 /* look for the end of this term and skip the opening parenthesis */
177 endt = ++arg;
178 while (*endt && *endt != ')')
179 endt++;
180 if (*endt != ')') {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]181 memprintf(err, "missing closing ')' after arguments to ACL keyword '%s'", aclkw->kw);
182 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]183 }
184 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]185
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]186 /* At this point, we have :
187 * - args[0] : beginning of the keyword
188 * - arg : end of the keyword, first character not part of keyword
189 * nor the opening parenthesis (so first character of args
190 * if present).
191 * - endt : end of the term (=arg or last parenthesis if args are present)
192 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]193 nbargs = make_arg_list(arg, endt - arg, smp->fetch->arg_mask, &smp->arg_p,
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]194 err, NULL, NULL, al);
195 if (nbargs < 0) {
196 /* note that make_arg_list will have set <err> here */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]197 memprintf(err, "ACL keyword '%s' : %s", aclkw->kw, *err);
198 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]199 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]200
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]201 if (!smp->arg_p) {
202 smp->arg_p = empty_arg_list;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]203 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]204 else if (smp->fetch->val_args && !smp->fetch->val_args(smp->arg_p, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]205 /* invalid keyword argument, error must have been
206 * set by val_args().
207 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]208 memprintf(err, "in argument to '%s', %s", aclkw->kw, *err);
209 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]210 }
211 arg = endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]212
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]213 /* look for the begining of the converters list. Those directly attached
214 * to the ACL keyword are found just after <arg> which points to the comma.
215 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]216 prev_type = smp->fetch->out_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]217 while (*arg) {
218 struct sample_conv *conv;
219 struct sample_conv_expr *conv_expr;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]220
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]221 if (*arg == ')') /* skip last closing parenthesis */
222 arg++;
223
224 if (*arg && *arg != ',') {
225 if (ckw)
226 memprintf(err, "ACL keyword '%s' : missing comma after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]227 aclkw->kw, ckw);
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]228 else
229 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]230 aclkw->kw);
231 goto out_free_smp;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]232 }
Willy Tarreauae52f062012-04-26 12:13:35 +0200[diff] [blame]233
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]234 while (*arg == ',') /* then trailing commas */
235 arg++;
Willy Tarreau2e845be2012-10-19 19:49:09 +0200[diff] [blame]236
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]237 begw = arg; /* start of conv keyword */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]238
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]239 if (!*begw)
240 /* none ? end of converters */
241 break;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]242
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]243 for (endw = begw; *endw && *endw != '(' && *endw != ','; endw++);
Willy Tarreau9ca69362013-10-22 19:10:06 +0200[diff] [blame]244
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]245 free(ckw);
246 ckw = my_strndup(begw, endw - begw);
Willy Tarreauf75d0082013-04-07 21:20:44 +0200[diff] [blame]247
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]248 conv = find_sample_conv(begw, endw - begw);
249 if (!conv) {
250 /* Unknown converter method */
251 memprintf(err, "ACL keyword '%s' : unknown conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]252 aclkw->kw, ckw);
253 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]254 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]255
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]256 arg = endw;
257 if (*arg == '(') {
258 /* look for the end of this term */
259 while (*arg && *arg != ')')
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]260 arg++;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]261 if (*arg != ')') {
262 memprintf(err, "ACL keyword '%s' : syntax error: missing ')' after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]263 aclkw->kw, ckw);
264 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]265 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]266 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]267
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]268 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
269 memprintf(err, "ACL keyword '%s' : returns type of conv method '%s' is unknown.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]270 aclkw->kw, ckw);
271 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]272 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]273
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]274 /* If impossible type conversion */
275 if (!sample_casts[prev_type][conv->in_type]) {
276 memprintf(err, "ACL keyword '%s' : conv method '%s' cannot be applied.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]277 aclkw->kw, ckw);
278 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]279 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]280
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]281 prev_type = conv->out_type;
282 conv_expr = calloc(1, sizeof(struct sample_conv_expr));
283 if (!conv_expr)
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]284 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]285
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]286 LIST_ADDQ(&(smp->conv_exprs), &(conv_expr->list));
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]287 conv_expr->conv = conv;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]288
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]289 if (arg != endw) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]290 int err_arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]291
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]292 if (!conv->arg_mask) {
293 memprintf(err, "ACL keyword '%s' : conv method '%s' does not support any args.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]294 aclkw->kw, ckw);
295 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]296 }
297
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]298 al->kw = smp->fetch->kw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]299 al->conv = conv_expr->conv->kw;
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]300 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]301 memprintf(err, "ACL keyword '%s' : invalid arg %d in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]302 aclkw->kw, err_arg+1, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]303 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]304 }
305
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]306 if (!conv_expr->arg_p)
307 conv_expr->arg_p = empty_arg_list;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]308
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]309 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]310 memprintf(err, "ACL keyword '%s' : invalid args in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]311 aclkw->kw, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]312 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]313 }
314 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]315 else if (ARGM(conv->arg_mask)) {
316 memprintf(err, "ACL keyword '%s' : missing args for conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]317 aclkw->kw, ckw);
318 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]319 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]320 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]321 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]322 else {
323 /* This is not an ACL keyword, so we hope this is a sample fetch
324 * keyword that we're going to transparently use as an ACL. If
325 * so, we retrieve a completely parsed expression with args and
326 * convs already done.
327 */
328 smp = sample_parse_expr((char **)args, &idx, err, al);
329 if (!smp) {
330 memprintf(err, "%s in ACL expression '%s'", *err, *args);
331 goto out_return;
332 }
333 }
334
335 expr = (struct acl_expr *)calloc(1, sizeof(*expr));
336 if (!expr) {
337 memprintf(err, "out of memory when parsing ACL expression");
338 goto out_return;
339 }
340
341 pattern_init_expr(&expr->pat);
342
343 expr->kw = aclkw ? aclkw->kw : smp->fetch->kw;
344 expr->pat.parse = aclkw ? aclkw->parse : NULL;
345 expr->pat.match = aclkw ? aclkw->match : NULL;
346 expr->smp = smp;
347 smp = NULL;
348
349 if (!expr->pat.parse) {
350 /* some types can be automatically converted */
351
352 switch (expr->smp ? expr->smp->fetch->out_type : aclkw->smp->out_type) {
353 case SMP_T_BOOL:
354 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
355 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
356 break;
357 case SMP_T_SINT:
358 case SMP_T_UINT:
359 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
360 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
361 break;
362 case SMP_T_IPV4:
363 case SMP_T_IPV6:
364 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
365 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
366 break;
367 }
368 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]369
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]370 /* Additional check to protect against common mistakes */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]371 cur_type = smp_expr_output_type(expr->smp);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]372 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]373 Warning("parsing acl keyword '%s' :\n"
374 " no pattern to match against were provided, so this ACL will never match.\n"
375 " If this is what you intended, please add '--' to get rid of this warning.\n"
376 " If you intended to match only for existence, please use '-m found'.\n"
377 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
378 "\n",
379 args[0]);
380 }
381
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]382 args++;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]383
384 /* check for options before patterns. Supported options are :
385 * -i : ignore case for all patterns by default
386 * -f : read patterns from those files
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]387 * -m : force matching method (must be used before -f)
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]388 * -- : everything after this is not an option
389 */
390 patflags = 0;
391 while (**args == '-') {
392 if ((*args)[1] == 'i')
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]393 patflags |= PAT_F_IGNORE_CASE;
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]394 else if ((*args)[1] == 'f') {
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]395 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]396 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]397 goto out_free_expr;
398 }
399
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]400 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]401 goto out_free_expr;
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]402 args++;
403 }
404 else if ((*args)[1] == 'm') {
405 int idx;
406
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]407 if (!LIST_ISEMPTY(&expr->pat.patterns) || !eb_is_empty(&expr->pat.pattern_tree)) {
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]408 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
409 goto out_free_expr;
410 }
411
Willy Tarreau6f8fe312013-11-28 22:24:25 +0100[diff] [blame]412 idx = pat_find_match_name(args[1]);
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]413 if (idx < 0) {
414 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
415 goto out_free_expr;
416 }
417
418 /* 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]419 if (!sample_casts[cur_type][pat_match_types[idx]]) {
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]420 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]421 goto out_free_expr;
422 }
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]423 expr->pat.parse = pat_parse_fcts[idx];
424 expr->pat.match = pat_match_fcts[idx];
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]425 args++;
426 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]427 else if ((*args)[1] == '-') {
428 args++;
429 break;
430 }
431 else
432 break;
433 args++;
434 }
435
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]436 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]437 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]438 goto out_free_expr;
439 }
440
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]441 /* now parse all patterns */
Thierry FOURNIER7148ce62013-12-06 19:06:43 +0100[diff] [blame]442 pattern = NULL;
443 if (!pattern_register(&expr->pat, args, NULL, &pattern, patflags, err))
444 goto out_free_pattern;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]445
446 return expr;
447
448 out_free_pattern:
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]449 pattern_free(pattern);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]450 out_free_expr:
451 prune_acl_expr(expr);
452 free(expr);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]453 free(ckw);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]454 out_free_smp:
455 free(smp);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]456 out_return:
457 return NULL;
458}
459
Krzysztof Piotr Oledzkia643baf2008-05-29 23:53:44 +0200[diff] [blame]460/* Purge everything in the acl <acl>, then return <acl>. */
461struct acl *prune_acl(struct acl *acl) {
462
463 struct acl_expr *expr, *exprb;
464
465 free(acl->name);
466
467 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
468 LIST_DEL(&expr->list);
469 prune_acl_expr(expr);
470 free(expr);
471 }
472
473 return acl;
474}
475
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]476/* Parse an ACL with the name starting at <args>[0], and with a list of already
477 * 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]478 * 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]479 * an anonymous one and it won't be merged with any other one. If <err> is not
480 * NULL, it will be filled with an appropriate error. This pointer must be
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]481 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
482 * dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]483 *
484 * args syntax: <aclname> <acl_expr>
485 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]486struct 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]487{
488 __label__ out_return, out_free_acl_expr, out_free_name;
489 struct acl *cur_acl;
490 struct acl_expr *acl_expr;
491 char *name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]492 const char *pos;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]493
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]494 if (**args && (pos = invalid_char(*args))) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]495 memprintf(err, "invalid character in ACL name : '%c'", *pos);
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]496 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]497 }
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]498
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]499 acl_expr = parse_acl_expr(args + 1, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]500 if (!acl_expr) {
501 /* parse_acl_expr will have filled <err> here */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]502 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]503 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]504
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]505 /* Check for args beginning with an opening parenthesis just after the
506 * subject, as this is almost certainly a typo. Right now we can only
507 * emit a warning, so let's do so.
508 */
Krzysztof Piotr Oledzki4cdd8312009-10-05 00:23:35 +0200[diff] [blame]509 if (!strchr(args[1], '(') && *args[2] == '(')
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]510 Warning("parsing acl '%s' :\n"
511 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
512 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
513 " If you are really sure this is not an error, please insert '--' between the\n"
514 " match and the pattern to make this warning message disappear.\n",
515 args[0], args[1], args[2]);
516
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]517 if (*args[0])
518 cur_acl = find_acl_by_name(args[0], known_acl);
519 else
520 cur_acl = NULL;
521
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]522 if (!cur_acl) {
523 name = strdup(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]524 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]525 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]526 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]527 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]528 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]529 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]530 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]531 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]532 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]533
534 LIST_INIT(&cur_acl->expr);
535 LIST_ADDQ(known_acl, &cur_acl->list);
536 cur_acl->name = name;
537 }
538
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]539 /* We want to know what features the ACL needs (typically HTTP parsing),
540 * and where it may be used. If an ACL relies on multiple matches, it is
541 * OK if at least one of them may match in the context where it is used.
542 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]543 cur_acl->use |= acl_expr->smp->fetch->use;
544 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]545 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
546 return cur_acl;
547
548 out_free_name:
549 free(name);
550 out_free_acl_expr:
551 prune_acl_expr(acl_expr);
552 free(acl_expr);
553 out_return:
554 return NULL;
555}
556
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]557/* Some useful ACLs provided by default. Only those used are allocated. */
558
559const struct {
560 const char *name;
561 const char *expr[4]; /* put enough for longest expression */
562} default_acl_list[] = {
Willy Tarreau58393e12008-07-20 10:39:22 +0200[diff] [blame]563 { .name = "TRUE", .expr = {"always_true",""}},
564 { .name = "FALSE", .expr = {"always_false",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]565 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]566 { .name = "HTTP", .expr = {"req_proto_http",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]567 { .name = "HTTP_1.0", .expr = {"req_ver","1.0",""}},
568 { .name = "HTTP_1.1", .expr = {"req_ver","1.1",""}},
569 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
570 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
571 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
572 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
573 { .name = "METH_POST", .expr = {"method","POST",""}},
574 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
575 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
576 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
577 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
578 { .name = "HTTP_CONTENT", .expr = {"hdr_val(content-length)","gt","0",""}},
Emeric Brunbede3d02009-06-30 17:54:00 +0200[diff] [blame]579 { .name = "RDP_COOKIE", .expr = {"req_rdp_cookie_cnt","gt","0",""}},
Willy Tarreauc6317702008-07-20 09:29:50 +0200[diff] [blame]580 { .name = "REQ_CONTENT", .expr = {"req_len","gt","0",""}},
Willy Tarreaub6fb4202008-07-20 11:18:28 +0200[diff] [blame]581 { .name = "WAIT_END", .expr = {"wait_end",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]582 { .name = NULL, .expr = {""}}
583};
584
585/* Find a default ACL from the default_acl list, compile it and return it.
586 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
587 * except when default ACLs are broken, in which case it will return NULL.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]588 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
589 * 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]590 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
591 * to report missing dependencies.
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]592 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]593static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
594 char **err, struct arg_list *al)
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]595{
596 __label__ out_return, out_free_acl_expr, out_free_name;
597 struct acl *cur_acl;
598 struct acl_expr *acl_expr;
599 char *name;
600 int index;
601
602 for (index = 0; default_acl_list[index].name != NULL; index++) {
603 if (strcmp(acl_name, default_acl_list[index].name) == 0)
604 break;
605 }
606
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]607 if (default_acl_list[index].name == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]608 memprintf(err, "no such ACL : '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]609 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]610 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]611
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]612 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]613 if (!acl_expr) {
614 /* parse_acl_expr must have filled err here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]615 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]616 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]617
618 name = strdup(acl_name);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]619 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]620 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]621 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]622 }
623
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]624 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]625 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]626 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]627 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]628 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]629
630 cur_acl->name = name;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]631 cur_acl->use |= acl_expr->smp->fetch->use;
632 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]633 LIST_INIT(&cur_acl->expr);
634 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
635 if (known_acl)
636 LIST_ADDQ(known_acl, &cur_acl->list);
637
638 return cur_acl;
639
640 out_free_name:
641 free(name);
642 out_free_acl_expr:
643 prune_acl_expr(acl_expr);
644 free(acl_expr);
645 out_return:
646 return NULL;
647}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]648
649/* Purge everything in the acl_cond <cond>, then return <cond>. */
650struct acl_cond *prune_acl_cond(struct acl_cond *cond)
651{
652 struct acl_term_suite *suite, *tmp_suite;
653 struct acl_term *term, *tmp_term;
654
655 /* iterate through all term suites and free all terms and all suites */
656 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
657 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
658 free(term);
659 free(suite);
660 }
661 return cond;
662}
663
664/* Parse an ACL condition starting at <args>[0], relying on a list of already
665 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]666 * case of low memory). Supports multiple conditions separated by "or". If
667 * <err> is not NULL, it will be filled with a pointer to an error message in
668 * case of error, that the caller is responsible for freeing. The initial
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]669 * location must either be freeable or NULL. The list <al> serves as a list head
670 * for unresolved dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]671 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]672struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]673 enum acl_cond_pol pol, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]674{
675 __label__ out_return, out_free_suite, out_free_term;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]676 int arg, neg;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]677 const char *word;
678 struct acl *cur_acl;
679 struct acl_term *cur_term;
680 struct acl_term_suite *cur_suite;
681 struct acl_cond *cond;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]682 unsigned int suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]683
684 cond = (struct acl_cond *)calloc(1, sizeof(*cond));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]685 if (cond == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]686 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]687 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]688 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]689
690 LIST_INIT(&cond->list);
691 LIST_INIT(&cond->suites);
692 cond->pol = pol;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]693 cond->val = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]694
695 cur_suite = NULL;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]696 suite_val = ~0U;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]697 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]698 for (arg = 0; *args[arg]; arg++) {
699 word = args[arg];
700
701 /* remove as many exclamation marks as we can */
702 while (*word == '!') {
703 neg = !neg;
704 word++;
705 }
706
707 /* an empty word is allowed because we cannot force the user to
708 * always think about not leaving exclamation marks alone.
709 */
710 if (!*word)
711 continue;
712
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]713 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]714 /* new term suite */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]715 cond->val |= suite_val;
716 suite_val = ~0U;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]717 cur_suite = NULL;
718 neg = 0;
719 continue;
720 }
721
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]722 if (strcmp(word, "{") == 0) {
723 /* we may have a complete ACL expression between two braces,
724 * find the last one.
725 */
726 int arg_end = arg + 1;
727 const char **args_new;
728
729 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
730 arg_end++;
731
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]732 if (!*args[arg_end]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]733 memprintf(err, "missing closing '}' in condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]734 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]735 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]736
737 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]738 if (!args_new) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]739 memprintf(err, "out of memory when parsing condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]740 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]741 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]742
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]743 args_new[0] = "";
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]744 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
745 args_new[arg_end - arg] = "";
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]746 cur_acl = parse_acl(args_new, known_acl, err, al);
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]747 free(args_new);
748
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]749 if (!cur_acl) {
750 /* note that parse_acl() must have filled <err> here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]751 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]752 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]753 word = args[arg + 1];
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]754 arg = arg_end;
755 }
756 else {
757 /* search for <word> in the known ACL names. If we do not find
758 * it, let's look for it in the default ACLs, and if found, add
759 * it to the list of ACLs of this proxy. This makes it possible
760 * to override them.
761 */
762 cur_acl = find_acl_by_name(word, known_acl);
763 if (cur_acl == NULL) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]764 cur_acl = find_acl_default(word, known_acl, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]765 if (cur_acl == NULL) {
766 /* note that find_acl_default() must have filled <err> here */
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]767 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]768 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]769 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]770 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]771
772 cur_term = (struct acl_term *)calloc(1, sizeof(*cur_term));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]773 if (cur_term == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]774 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]775 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]776 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]777
778 cur_term->acl = cur_acl;
779 cur_term->neg = neg;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]780
781 /* Here it is a bit complex. The acl_term_suite is a conjunction
782 * of many terms. It may only be used if all of its terms are
783 * usable at the same time. So the suite's validity domain is an
784 * AND between all ACL keywords' ones. But, the global condition
785 * is valid if at least one term suite is OK. So it's an OR between
786 * all of their validity domains. We could emit a warning as soon
787 * as suite_val is null because it means that the last ACL is not
788 * compatible with the previous ones. Let's remain simple for now.
789 */
790 cond->use |= cur_acl->use;
791 suite_val &= cur_acl->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]792
793 if (!cur_suite) {
794 cur_suite = (struct acl_term_suite *)calloc(1, sizeof(*cur_suite));
Willy Tarreauf678b7f2013-01-24 00:25:39 +0100[diff] [blame]795 if (cur_suite == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]796 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]797 goto out_free_term;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]798 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]799 LIST_INIT(&cur_suite->terms);
800 LIST_ADDQ(&cond->suites, &cur_suite->list);
801 }
802 LIST_ADDQ(&cur_suite->terms, &cur_term->list);
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]803 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]804 }
805
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]806 cond->val |= suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]807 return cond;
808
809 out_free_term:
810 free(cur_term);
811 out_free_suite:
812 prune_acl_cond(cond);
813 free(cond);
814 out_return:
815 return NULL;
816}
817
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]818/* Builds an ACL condition starting at the if/unless keyword. The complete
819 * condition is returned. NULL is returned in case of error or if the first
820 * word is neither "if" nor "unless". It automatically sets the file name and
Willy Tarreau25320b22013-03-24 07:22:08 +0100[diff] [blame]821 * the line number in the condition for better error reporting, and sets the
822 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]823 * be filled with a pointer to an error message in case of error, that the
824 * caller is responsible for freeing. The initial location must either be
825 * freeable or NULL.
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]826 */
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]827struct 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]828{
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]829 enum acl_cond_pol pol = ACL_COND_NONE;
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]830 struct acl_cond *cond = NULL;
831
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]832 if (err)
833 *err = NULL;
834
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]835 if (!strcmp(*args, "if")) {
836 pol = ACL_COND_IF;
837 args++;
838 }
839 else if (!strcmp(*args, "unless")) {
840 pol = ACL_COND_UNLESS;
841 args++;
842 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]843 else {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]844 memprintf(err, "conditions must start with either 'if' or 'unless'");
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]845 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]846 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]847
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]848 cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]849 if (!cond) {
850 /* note that parse_acl_cond must have filled <err> here */
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]851 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]852 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]853
854 cond->file = file;
855 cond->line = line;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]856 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]857 return cond;
858}
859
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]860/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
861 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]862 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]863 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
864 * function only computes the condition, it does not apply the polarity required
865 * 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]866 *
867 * res = acl_pass(res);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]868 * if (res == ACL_TEST_MISS)
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]869 * return 0;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]870 * if (cond->pol == ACL_COND_UNLESS)
871 * res = !res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]872 */
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]873enum 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]874{
875 __label__ fetch_next;
876 struct acl_term_suite *suite;
877 struct acl_term *term;
878 struct acl_expr *expr;
879 struct acl *acl;
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]880 struct sample smp;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]881 enum acl_test_res acl_res, suite_res, cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]882
Willy Tarreau7a777ed2012-04-26 11:44:02 +0200[diff] [blame]883 /* ACLs are iterated over all values, so let's always set the flag to
884 * indicate this to the fetch functions.
885 */
886 opt |= SMP_OPT_ITERATE;
887
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]888 /* We're doing a logical OR between conditions so we initialize to FAIL.
889 * The MISS status is propagated down from the suites.
890 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]891 cond_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]892 list_for_each_entry(suite, &cond->suites, list) {
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]893 /* Evaluate condition suite <suite>. We stop at the first term
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]894 * which returns ACL_TEST_FAIL. The MISS status is still propagated
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]895 * in case of uncertainty in the result.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]896 */
897
898 /* we're doing a logical AND between terms, so we must set the
899 * initial value to PASS.
900 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]901 suite_res = ACL_TEST_PASS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]902 list_for_each_entry(term, &suite->terms, list) {
903 acl = term->acl;
904
905 /* FIXME: use cache !
906 * check acl->cache_idx for this.
907 */
908
909 /* ACL result not cached. Let's scan all the expressions
910 * and use the first one to match.
911 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]912 acl_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]913 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]914 /* we need to reset context and flags */
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]915 memset(&smp, 0, sizeof(smp));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]916 fetch_next:
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]917 if (!sample_process(px, l4, l7, opt, expr->smp, &smp)) {
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]918 /* maybe we could not fetch because of missing data */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]919 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]920 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]921 continue;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]922 }
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]923
Thierry FOURNIER76090642013-12-10 15:03:38 +0100[diff] [blame]924 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, NULL, NULL, NULL));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]925 /*
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]926 * OK now acl_res holds the result of this expression
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]927 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]928 *
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]929 * Then if (!MISS) we can cache the result, and put
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]930 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]931 *
932 * FIXME: implement cache.
933 *
934 */
935
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]936 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]937 if (acl_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]938 break;
939
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]940 if (smp.flags & SMP_F_NOT_LAST)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]941 goto fetch_next;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]942
943 /* sometimes we know the fetched data is subject to change
944 * later and give another chance for a new match (eg: request
945 * size, time, ...)
946 */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]947 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]948 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]949 }
950 /*
951 * Here we have the result of an ACL (cached or not).
952 * ACLs are combined, negated or not, to form conditions.
953 */
954
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]955 if (term->neg)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]956 acl_res = acl_neg(acl_res);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]957
958 suite_res &= acl_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]959
Willy Tarreau79c412b2013-10-30 19:30:32 +0100[diff] [blame]960 /* we're ANDing these terms, so a single FAIL or MISS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]961 if (suite_res != ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]962 break;
963 }
964 cond_res |= suite_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]965
966 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]967 if (cond_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]968 break;
969 }
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]970 return cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]971}
972
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]973/* Returns a pointer to the first ACL conflicting with usage at place <where>
974 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
975 * no conflict is found. Only full conflicts are detected (ACL is not usable).
976 * Use the next function to check for useless keywords.
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]977 */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]978const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]979{
980 struct acl_term_suite *suite;
981 struct acl_term *term;
982 struct acl *acl;
983
984 list_for_each_entry(suite, &cond->suites, list) {
985 list_for_each_entry(term, &suite->terms, list) {
986 acl = term->acl;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]987 if (!(acl->val & where))
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]988 return acl;
989 }
990 }
991 return NULL;
992}
993
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]994/* Returns a pointer to the first ACL and its first keyword to conflict with
995 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
996 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
997 * null), or false if not conflict is found. The first useless keyword is
998 * returned.
999 */
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1000int 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]1001{
1002 struct acl_term_suite *suite;
1003 struct acl_term *term;
1004 struct acl_expr *expr;
1005
1006 list_for_each_entry(suite, &cond->suites, list) {
1007 list_for_each_entry(term, &suite->terms, list) {
1008 list_for_each_entry(expr, &term->acl->expr, list) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1009 if (!(expr->smp->fetch->val & where)) {
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1010 if (acl)
1011 *acl = term->acl;
1012 if (kw)
1013 *kw = expr->kw;
1014 return 1;
1015 }
1016 }
1017 }
1018 }
1019 return 0;
1020}
1021
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1022/*
1023 * Find targets for userlist and groups in acl. Function returns the number
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1024 * of errors or OK if everything is fine. It must be called only once sample
1025 * fetch arguments have been resolved (after smp_resolve_args()).
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1026 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1027int acl_find_targets(struct proxy *p)
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1028{
1029
1030 struct acl *acl;
1031 struct acl_expr *expr;
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1032 struct pattern *pattern;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1033 int cfgerr = 0;
1034
1035 list_for_each_entry(acl, &p->acl, list) {
1036 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1037 if (!strcmp(expr->kw, "http_auth_group")) {
1038 /* Note: the ARGT_USR argument may only have been resolved earlier
1039 * by smp_resolve_args().
1040 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1041 if (expr->smp->arg_p->unresolved) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1042 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]1043 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]1044 cfgerr++;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]1045 continue;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1046 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1047
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1048 if (LIST_ISEMPTY(&expr->pat.patterns)) {
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1049 Alert("proxy %s: acl %s %s(): no groups specified.\n",
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1050 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1051 cfgerr++;
1052 continue;
1053 }
1054
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1055 list_for_each_entry(pattern, &expr->pat.patterns, list) {
Willy Tarreau7d1df412012-11-23 23:47:36 +0100[diff] [blame]1056 /* this keyword only has one argument */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1057 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]1058
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1059 if (!pattern->val.group_mask) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1060 Alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
1061 p->id, acl->name, expr->kw, pattern->ptr.str);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1062 cfgerr++;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1063 }
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1064 free(pattern->ptr.str);
1065 pattern->ptr.str = NULL;
1066 pattern->len = 0;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1067 }
1068 }
1069 }
1070 }
1071
1072 return cfgerr;
1073}
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1074
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]1075/* initializes ACLs by resolving the sample fetch names they rely upon.
1076 * Returns 0 on success, otherwise an error.
1077 */
1078int init_acl()
1079{
1080 int err = 0;
1081 int index;
1082 const char *name;
1083 struct acl_kw_list *kwl;
1084 struct sample_fetch *smp;
1085
1086 list_for_each_entry(kwl, &acl_keywords.list, list) {
1087 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1088 name = kwl->kw[index].fetch_kw;
1089 if (!name)
1090 name = kwl->kw[index].kw;
1091
1092 smp = find_sample_fetch(name, strlen(name));
1093 if (!smp) {
1094 Alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1095 kwl->kw[index].kw, name);
1096 err++;
1097 continue;
1098 }
1099 kwl->kw[index].smp = smp;
1100 }
1101 }
1102 return err;
1103}
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1104
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1105/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1106/* All supported sample and ACL keywords must be declared here. */
1107/************************************************************************/
1108
1109/* Note: must not be declared <const> as its list will be overwritten.
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]1110 * Please take care of keeping this list alphabetically sorted.
1111 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200[diff] [blame]1112static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1113 { /* END */ },
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1114}};
1115
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1116__attribute__((constructor))
1117static void __acl_init(void)
1118{
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1119 acl_register_keywords(&acl_kws);
1120}
1121
1122
1123/*
1124 * Local variables:
1125 * c-indent-level: 8
1126 * c-basic-offset: 8
1127 * End:
1128 */