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git01.mediatek.com / haproxy / aa222aadb6ff870cc97ea99640ce5004411f9681 / . / src / acl.c
blob: 49691552d300f30b6bcfa17ea778fc394e644c32 [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 */
Thierry FOURNIER1794fdf2014-01-17 15:25:13 +0100[diff] [blame]42static inline enum acl_test_res pat2acl(struct pattern *pat)
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]43{
Thierry FOURNIER1794fdf2014-01-17 15:25:13 +0100[diff] [blame]44 if (pat)
45 return ACL_TEST_PASS;
46 else
47 return ACL_TEST_FAIL;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]48}
49
Willy Tarreaua5909832007-06-17 20:40:25 +0200[diff] [blame]50/*
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]51 * Registers the ACL keyword list <kwl> as a list of valid keywords for next
52 * parsing sessions.
53 */
54void acl_register_keywords(struct acl_kw_list *kwl)
55{
56 LIST_ADDQ(&acl_keywords.list, &kwl->list);
57}
58
59/*
60 * Unregisters the ACL keyword list <kwl> from the list of valid keywords.
61 */
62void acl_unregister_keywords(struct acl_kw_list *kwl)
63{
64 LIST_DEL(&kwl->list);
65 LIST_INIT(&kwl->list);
66}
67
68/* Return a pointer to the ACL <name> within the list starting at <head>, or
69 * NULL if not found.
70 */
71struct acl *find_acl_by_name(const char *name, struct list *head)
72{
73 struct acl *acl;
74 list_for_each_entry(acl, head, list) {
75 if (strcmp(acl->name, name) == 0)
76 return acl;
77 }
78 return NULL;
79}
80
81/* 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]82 * <kw> contains an opening parenthesis or a comma, only the left part of it is
83 * checked.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]84 */
85struct acl_keyword *find_acl_kw(const char *kw)
86{
87 int index;
88 const char *kwend;
89 struct acl_kw_list *kwl;
90
Willy Tarreau4bfa4222013-12-16 22:01:06 +0100[diff] [blame]91 kwend = kw;
92 while (*kwend && *kwend != '(' && *kwend != ',')
93 kwend++;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]94
95 list_for_each_entry(kwl, &acl_keywords.list, list) {
96 for (index = 0; kwl->kw[index].kw != NULL; index++) {
97 if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
98 kwl->kw[index].kw[kwend-kw] == 0)
99 return &kwl->kw[index];
100 }
101 }
102 return NULL;
103}
104
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]105static struct acl_expr *prune_acl_expr(struct acl_expr *expr)
106{
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]107 struct arg *arg;
108
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]109 pattern_prune(&expr->pat);
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]110
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]111 for (arg = expr->smp->arg_p; arg; arg++) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]112 if (arg->type == ARGT_STOP)
113 break;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]114 if (arg->type == ARGT_STR || arg->unresolved) {
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]115 free(arg->data.str.str);
116 arg->data.str.str = NULL;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]117 arg->unresolved = 0;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]118 }
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]119 }
120
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]121 if (expr->smp->arg_p != empty_arg_list)
122 free(expr->smp->arg_p);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]123 return expr;
124}
125
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]126/* Parse an ACL expression starting at <args>[0], and return it. If <err> is
127 * 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]128 * error. This pointer must be freeable or NULL. <al> is an arg_list serving
129 * as a list head to report missing dependencies.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]130 *
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]131 * Right now, the only accepted syntax is :
132 * <subject> [<value>...]
133 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]134struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]135{
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]136 __label__ out_return, out_free_expr;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]137 struct acl_expr *expr;
138 struct acl_keyword *aclkw;
Thierry FOURNIER7148ce62013-12-06 19:06:43 +0100[diff] [blame]139 int patflags;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]140 const char *arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]141 struct sample_expr *smp = NULL;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]142 int idx = 0;
143 char *ckw = NULL;
144 const char *begw;
145 const char *endw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]146 const char *endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]147 unsigned long prev_type;
148 int cur_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]149 int nbargs;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]150 int operator = STD_OP_EQ;
151 int op;
152 int contain_colon, have_dot;
153 const char *dot;
154 signed long long value, minor;
155 /* The following buffer contain two numbers, a ':' separator and the final \0. */
156 char buffer[NB_LLMAX_STR + 1 + NB_LLMAX_STR + 1];
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]157 int is_loaded;
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]158 int unique_id;
159 char *error;
160 struct pat_ref *ref;
161 struct pattern_expr *pattern_expr;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]162
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]163 /* First, we look for an ACL keyword. And if we don't find one, then
164 * we look for a sample fetch expression starting with a sample fetch
165 * keyword.
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]166 */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]167
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]168 al->ctx = ARGC_ACL; // to report errors while resolving args late
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]169 al->kw = *args;
170 al->conv = NULL;
171
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]172 aclkw = find_acl_kw(args[0]);
Willy Tarreau20490922014-03-17 18:04:27 +0100[diff] [blame]173 if (aclkw) {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]174 /* OK we have a real ACL keyword */
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]175
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]176 /* build new sample expression for this ACL */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]177 smp = calloc(1, sizeof(struct sample_expr));
178 if (!smp) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]179 memprintf(err, "out of memory when parsing ACL expression");
180 goto out_return;
181 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]182 LIST_INIT(&(smp->conv_exprs));
183 smp->fetch = aclkw->smp;
184 smp->arg_p = empty_arg_list;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]185
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]186 /* look for the begining of the subject arguments */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]187 for (arg = args[0]; *arg && *arg != '(' && *arg != ','; arg++);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]188
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]189 endt = arg;
190 if (*endt == '(') {
191 /* look for the end of this term and skip the opening parenthesis */
192 endt = ++arg;
193 while (*endt && *endt != ')')
194 endt++;
195 if (*endt != ')') {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]196 memprintf(err, "missing closing ')' after arguments to ACL keyword '%s'", aclkw->kw);
197 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]198 }
199 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]200
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]201 /* At this point, we have :
202 * - args[0] : beginning of the keyword
203 * - arg : end of the keyword, first character not part of keyword
204 * nor the opening parenthesis (so first character of args
205 * if present).
206 * - endt : end of the term (=arg or last parenthesis if args are present)
207 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]208 nbargs = make_arg_list(arg, endt - arg, smp->fetch->arg_mask, &smp->arg_p,
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]209 err, NULL, NULL, al);
210 if (nbargs < 0) {
211 /* note that make_arg_list will have set <err> here */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]212 memprintf(err, "ACL keyword '%s' : %s", aclkw->kw, *err);
213 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]214 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]215
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]216 if (!smp->arg_p) {
217 smp->arg_p = empty_arg_list;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]218 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]219 else if (smp->fetch->val_args && !smp->fetch->val_args(smp->arg_p, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]220 /* invalid keyword argument, error must have been
221 * set by val_args().
222 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]223 memprintf(err, "in argument to '%s', %s", aclkw->kw, *err);
224 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]225 }
226 arg = endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]227
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]228 /* look for the begining of the converters list. Those directly attached
229 * to the ACL keyword are found just after <arg> which points to the comma.
230 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]231 prev_type = smp->fetch->out_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]232 while (*arg) {
233 struct sample_conv *conv;
234 struct sample_conv_expr *conv_expr;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]235
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]236 if (*arg == ')') /* skip last closing parenthesis */
237 arg++;
238
239 if (*arg && *arg != ',') {
240 if (ckw)
241 memprintf(err, "ACL keyword '%s' : missing comma after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]242 aclkw->kw, ckw);
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]243 else
244 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]245 aclkw->kw);
246 goto out_free_smp;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]247 }
Willy Tarreauae52f062012-04-26 12:13:35 +0200[diff] [blame]248
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]249 while (*arg == ',') /* then trailing commas */
250 arg++;
Willy Tarreau2e845be2012-10-19 19:49:09 +0200[diff] [blame]251
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]252 begw = arg; /* start of conv keyword */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]253
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]254 if (!*begw)
255 /* none ? end of converters */
256 break;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]257
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]258 for (endw = begw; *endw && *endw != '(' && *endw != ','; endw++);
Willy Tarreau9ca69362013-10-22 19:10:06 +0200[diff] [blame]259
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]260 free(ckw);
261 ckw = my_strndup(begw, endw - begw);
Willy Tarreauf75d0082013-04-07 21:20:44 +0200[diff] [blame]262
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]263 conv = find_sample_conv(begw, endw - begw);
264 if (!conv) {
265 /* Unknown converter method */
266 memprintf(err, "ACL keyword '%s' : unknown conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]267 aclkw->kw, ckw);
268 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]269 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]270
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]271 arg = endw;
272 if (*arg == '(') {
273 /* look for the end of this term */
274 while (*arg && *arg != ')')
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]275 arg++;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]276 if (*arg != ')') {
277 memprintf(err, "ACL keyword '%s' : syntax error: missing ')' after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]278 aclkw->kw, ckw);
279 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]280 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]281 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]282
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]283 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
284 memprintf(err, "ACL keyword '%s' : returns type of conv method '%s' is unknown.",
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 /* If impossible type conversion */
290 if (!sample_casts[prev_type][conv->in_type]) {
291 memprintf(err, "ACL keyword '%s' : conv method '%s' cannot be applied.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]292 aclkw->kw, ckw);
293 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]294 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]295
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]296 prev_type = conv->out_type;
297 conv_expr = calloc(1, sizeof(struct sample_conv_expr));
298 if (!conv_expr)
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]299 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]300
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]301 LIST_ADDQ(&(smp->conv_exprs), &(conv_expr->list));
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]302 conv_expr->conv = conv;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]303
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]304 if (arg != endw) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]305 int err_arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]306
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]307 if (!conv->arg_mask) {
308 memprintf(err, "ACL keyword '%s' : conv method '%s' does not support any args.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]309 aclkw->kw, ckw);
310 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]311 }
312
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]313 al->kw = smp->fetch->kw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]314 al->conv = conv_expr->conv->kw;
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]315 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]316 memprintf(err, "ACL keyword '%s' : invalid arg %d in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]317 aclkw->kw, err_arg+1, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]318 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]319 }
320
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]321 if (!conv_expr->arg_p)
322 conv_expr->arg_p = empty_arg_list;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]323
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]324 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]325 memprintf(err, "ACL keyword '%s' : invalid args in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]326 aclkw->kw, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]327 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]328 }
329 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]330 else if (ARGM(conv->arg_mask)) {
331 memprintf(err, "ACL keyword '%s' : missing args for conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]332 aclkw->kw, ckw);
333 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]334 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]335 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]336 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]337 else {
338 /* This is not an ACL keyword, so we hope this is a sample fetch
339 * keyword that we're going to transparently use as an ACL. If
340 * so, we retrieve a completely parsed expression with args and
341 * convs already done.
342 */
343 smp = sample_parse_expr((char **)args, &idx, err, al);
344 if (!smp) {
345 memprintf(err, "%s in ACL expression '%s'", *err, *args);
346 goto out_return;
347 }
348 }
349
350 expr = (struct acl_expr *)calloc(1, sizeof(*expr));
351 if (!expr) {
352 memprintf(err, "out of memory when parsing ACL expression");
353 goto out_return;
354 }
355
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]356 pattern_init_head(&expr->pat);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]357
358 expr->kw = aclkw ? aclkw->kw : smp->fetch->kw;
359 expr->pat.parse = aclkw ? aclkw->parse : NULL;
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]360 expr->pat.index = aclkw ? aclkw->index : NULL;
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]361 expr->pat.match = aclkw ? aclkw->match : NULL;
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]362 expr->pat.delete = aclkw ? aclkw->delete : NULL;
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]363 expr->pat.prune = aclkw ? aclkw->prune : NULL;
Thierry FOURNIER55d0b102014-01-15 11:25:26 +0100[diff] [blame]364 expr->pat.find_smp = aclkw ? aclkw->find_smp : NULL;
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]365 expr->pat.expect_type = smp->fetch->out_type;
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]366 expr->smp = smp;
367 smp = NULL;
368
369 if (!expr->pat.parse) {
370 /* some types can be automatically converted */
371
372 switch (expr->smp ? expr->smp->fetch->out_type : aclkw->smp->out_type) {
373 case SMP_T_BOOL:
374 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]375 expr->pat.index = pat_index_fcts[PAT_MATCH_BOOL];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]376 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]377 expr->pat.delete = pat_delete_fcts[PAT_MATCH_BOOL];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]378 expr->pat.prune = pat_prune_fcts[PAT_MATCH_BOOL];
Thierry FOURNIER55d0b102014-01-15 11:25:26 +0100[diff] [blame]379 expr->pat.find_smp = pat_find_smp_fcts[PAT_MATCH_BOOL];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]380 expr->pat.expect_type = pat_match_types[PAT_MATCH_BOOL];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]381 break;
382 case SMP_T_SINT:
383 case SMP_T_UINT:
384 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]385 expr->pat.index = pat_index_fcts[PAT_MATCH_INT];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]386 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]387 expr->pat.delete = pat_delete_fcts[PAT_MATCH_INT];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]388 expr->pat.prune = pat_prune_fcts[PAT_MATCH_INT];
Thierry FOURNIER55d0b102014-01-15 11:25:26 +0100[diff] [blame]389 expr->pat.find_smp = pat_find_smp_fcts[PAT_MATCH_INT];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]390 expr->pat.expect_type = pat_match_types[PAT_MATCH_INT];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]391 break;
392 case SMP_T_IPV4:
393 case SMP_T_IPV6:
394 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]395 expr->pat.index = pat_index_fcts[PAT_MATCH_IP];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]396 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]397 expr->pat.delete = pat_delete_fcts[PAT_MATCH_IP];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]398 expr->pat.prune = pat_prune_fcts[PAT_MATCH_IP];
Thierry FOURNIER55d0b102014-01-15 11:25:26 +0100[diff] [blame]399 expr->pat.find_smp = pat_find_smp_fcts[PAT_MATCH_IP];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]400 expr->pat.expect_type = pat_match_types[PAT_MATCH_IP];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]401 break;
402 }
403 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]404
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]405 /* Additional check to protect against common mistakes */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]406 cur_type = smp_expr_output_type(expr->smp);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]407 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]408 Warning("parsing acl keyword '%s' :\n"
409 " no pattern to match against were provided, so this ACL will never match.\n"
410 " If this is what you intended, please add '--' to get rid of this warning.\n"
411 " If you intended to match only for existence, please use '-m found'.\n"
412 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
413 "\n",
414 args[0]);
415 }
416
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]417 args++;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]418
419 /* check for options before patterns. Supported options are :
420 * -i : ignore case for all patterns by default
421 * -f : read patterns from those files
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]422 * -m : force matching method (must be used before -f)
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]423 * -u : force the unique id of the acl
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]424 * -- : everything after this is not an option
425 */
426 patflags = 0;
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]427 is_loaded = 0;
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]428 unique_id = -1;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]429 while (**args == '-') {
430 if ((*args)[1] == 'i')
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]431 patflags |= PAT_F_IGNORE_CASE;
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]432 else if ((*args)[1] == 'u') {
433 unique_id = strtol(args[1], &error, 10);
434 if (*error != '\0') {
435 memprintf(err, "the argument of -u must be an integer");
436 goto out_free_expr;
437 }
438
439 /* Check if this id is really unique. */
440 if (pat_ref_lookupid(unique_id)) {
441 memprintf(err, "the id is already used");
442 goto out_free_expr;
443 }
444
445 args++;
446 }
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]447 else if ((*args)[1] == 'f') {
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]448 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]449 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]450 goto out_free_expr;
451 }
452
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]453 if (!pattern_read_from_file(&expr->pat, PAT_REF_ACL, args[1], patflags | PAT_F_FROM_FILE, err))
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]454 goto out_free_expr;
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]455 is_loaded = 1;
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]456 args++;
457 }
458 else if ((*args)[1] == 'm') {
459 int idx;
460
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]461 if (is_loaded) {
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]462 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
463 goto out_free_expr;
464 }
465
Willy Tarreau6f8fe312013-11-28 22:24:25 +0100[diff] [blame]466 idx = pat_find_match_name(args[1]);
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]467 if (idx < 0) {
468 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
469 goto out_free_expr;
470 }
471
472 /* Note: -m found is always valid, bool/int are compatible, str/bin/reg/len are compatible */
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]473 if (!sample_casts[cur_type][pat_match_types[idx]]) {
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]474 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]475 goto out_free_expr;
476 }
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]477 expr->pat.parse = pat_parse_fcts[idx];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]478 expr->pat.index = pat_index_fcts[idx];
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]479 expr->pat.match = pat_match_fcts[idx];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]480 expr->pat.delete = pat_delete_fcts[idx];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]481 expr->pat.prune = pat_prune_fcts[idx];
Thierry FOURNIER55d0b102014-01-15 11:25:26 +0100[diff] [blame]482 expr->pat.find_smp = pat_find_smp_fcts[idx];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]483 expr->pat.expect_type = pat_match_types[idx];
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]484 args++;
485 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]486 else if ((*args)[1] == '-') {
487 args++;
488 break;
489 }
490 else
491 break;
492 args++;
493 }
494
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]495 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]496 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]497 goto out_free_expr;
498 }
499
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]500 /* Create new patern reference. */
501 ref = pat_ref_newid(unique_id, PAT_REF_ACL);
502 if (!ref) {
503 memprintf(err, "memory error");
504 goto out_free_expr;
505 }
506
507 /* Create new pattern expression associated to this reference. */
508 pattern_expr = pattern_new_expr(&expr->pat, ref, err);
509 if (!pattern_expr)
510 goto out_free_expr;
511
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]512 /* now parse all patterns */
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]513 while (**args) {
514 arg = *args;
515
516 /* Compatibility layer. Each pattern can parse only one string per pattern,
517 * but the pat_parser_int() and pat_parse_dotted_ver() parsers were need
518 * optionnaly two operators. The first operator is the match method: eq,
519 * le, lt, ge and gt. pat_parse_int() and pat_parse_dotted_ver() functions
520 * can have a compatibility syntax based on ranges:
521 *
522 * pat_parse_int():
523 *
524 * "eq x" -> "x" or "x:x"
525 * "le x" -> ":x"
526 * "lt x" -> ":y" (with y = x - 1)
527 * "ge x" -> "x:"
528 * "gt x" -> "y:" (with y = x + 1)
529 *
530 * pat_parse_dotted_ver():
531 *
532 * "eq x.y" -> "x.y" or "x.y:x.y"
533 * "le x.y" -> ":x.y"
534 * "lt x.y" -> ":w.z" (with w.z = x.y - 1)
535 * "ge x.y" -> "x.y:"
536 * "gt x.y" -> "w.z:" (with w.z = x.y + 1)
537 *
538 * If y is not present, assume that is "0".
539 *
540 * The syntax eq, le, lt, ge and gt are proper to the acl syntax. The
541 * following block of code detect the operator, and rewrite each value
542 * in parsable string.
543 */
544 if (expr->pat.parse == pat_parse_int ||
545 expr->pat.parse == pat_parse_dotted_ver) {
546 /* Check for operator. If the argument is operator, memorise it and
547 * continue to the next argument.
548 */
549 op = get_std_op(arg);
550 if (op != -1) {
551 operator = op;
552 args++;
553 continue;
554 }
555
556 /* Check if the pattern contain ':' or '-' character. */
557 contain_colon = (strchr(arg, ':') || strchr(arg, '-'));
558
559 /* If the pattern contain ':' or '-' character, give it to the parser as is.
560 * If no contain ':' and operator is STD_OP_EQ, give it to the parser as is.
561 * In other case, try to convert the value according with the operator.
562 */
563 if (!contain_colon && operator != STD_OP_EQ) {
564 /* Search '.' separator. */
565 dot = strchr(arg, '.');
566 if (!dot) {
567 have_dot = 0;
568 minor = 0;
569 dot = arg + strlen(arg);
570 }
571 else
572 have_dot = 1;
573
574 /* convert the integer minor part for the pat_parse_dotted_ver() function. */
575 if (expr->pat.parse == pat_parse_dotted_ver && have_dot) {
576 if (strl2llrc(dot+1, strlen(dot+1), &minor) != 0) {
577 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]578 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]579 }
580 if (minor >= 65536) {
581 memprintf(err, "'%s' contains too large a minor value", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]582 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]583 }
584 }
585
586 /* convert the integer value for the pat_parse_int() function, and the
587 * integer major part for the pat_parse_dotted_ver() function.
588 */
589 if (strl2llrc(arg, dot - arg, &value) != 0) {
590 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]591 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]592 }
593 if (expr->pat.parse == pat_parse_dotted_ver) {
594 if (value >= 65536) {
595 memprintf(err, "'%s' contains too large a major value", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]596 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]597 }
598 value = (value << 16) | (minor & 0xffff);
599 }
600
601 switch (operator) {
602
603 case STD_OP_EQ: /* this case is not possible. */
604 memprintf(err, "internal error");
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]605 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]606
607 case STD_OP_GT:
608 value++; /* gt = ge + 1 */
609
610 case STD_OP_GE:
611 if (expr->pat.parse == pat_parse_int)
612 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld:", value);
613 else
614 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld.%lld:",
615 value >> 16, value & 0xffff);
616 arg = buffer;
617 break;
618
619 case STD_OP_LT:
620 value--; /* lt = le - 1 */
621
622 case STD_OP_LE:
623 if (expr->pat.parse == pat_parse_int)
624 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld", value);
625 else
626 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld.%lld",
627 value >> 16, value & 0xffff);
628 arg = buffer;
629 break;
630 }
631 }
632 }
633
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]634 /* Add sample to the reference, and try to compile it fior each pattern
635 * using this value.
636 */
637 if (!pat_ref_add(ref, arg, NULL, err))
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]638 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]639 args++;
640 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]641
642 return expr;
643
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]644 out_free_expr:
645 prune_acl_expr(expr);
646 free(expr);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]647 free(ckw);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]648 out_free_smp:
649 free(smp);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]650 out_return:
651 return NULL;
652}
653
Krzysztof Piotr Oledzkia643baf2008-05-29 23:53:44 +0200[diff] [blame]654/* Purge everything in the acl <acl>, then return <acl>. */
655struct acl *prune_acl(struct acl *acl) {
656
657 struct acl_expr *expr, *exprb;
658
659 free(acl->name);
660
661 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
662 LIST_DEL(&expr->list);
663 prune_acl_expr(expr);
664 free(expr);
665 }
666
667 return acl;
668}
669
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]670/* Parse an ACL with the name starting at <args>[0], and with a list of already
671 * 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]672 * 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]673 * an anonymous one and it won't be merged with any other one. If <err> is not
674 * NULL, it will be filled with an appropriate error. This pointer must be
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]675 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
676 * dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]677 *
678 * args syntax: <aclname> <acl_expr>
679 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]680struct 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]681{
682 __label__ out_return, out_free_acl_expr, out_free_name;
683 struct acl *cur_acl;
684 struct acl_expr *acl_expr;
685 char *name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]686 const char *pos;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]687
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]688 if (**args && (pos = invalid_char(*args))) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]689 memprintf(err, "invalid character in ACL name : '%c'", *pos);
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]690 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]691 }
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]692
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]693 acl_expr = parse_acl_expr(args + 1, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]694 if (!acl_expr) {
695 /* parse_acl_expr will have filled <err> here */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]696 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]697 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]698
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]699 /* Check for args beginning with an opening parenthesis just after the
700 * subject, as this is almost certainly a typo. Right now we can only
701 * emit a warning, so let's do so.
702 */
Krzysztof Piotr Oledzki4cdd8312009-10-05 00:23:35 +0200[diff] [blame]703 if (!strchr(args[1], '(') && *args[2] == '(')
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]704 Warning("parsing acl '%s' :\n"
705 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
706 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
707 " If you are really sure this is not an error, please insert '--' between the\n"
708 " match and the pattern to make this warning message disappear.\n",
709 args[0], args[1], args[2]);
710
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]711 if (*args[0])
712 cur_acl = find_acl_by_name(args[0], known_acl);
713 else
714 cur_acl = NULL;
715
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]716 if (!cur_acl) {
717 name = strdup(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]718 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]719 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]720 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]721 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]722 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]723 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]724 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]725 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]726 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]727
728 LIST_INIT(&cur_acl->expr);
729 LIST_ADDQ(known_acl, &cur_acl->list);
730 cur_acl->name = name;
731 }
732
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]733 /* We want to know what features the ACL needs (typically HTTP parsing),
734 * and where it may be used. If an ACL relies on multiple matches, it is
735 * OK if at least one of them may match in the context where it is used.
736 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]737 cur_acl->use |= acl_expr->smp->fetch->use;
738 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]739 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
740 return cur_acl;
741
742 out_free_name:
743 free(name);
744 out_free_acl_expr:
745 prune_acl_expr(acl_expr);
746 free(acl_expr);
747 out_return:
748 return NULL;
749}
750
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]751/* Some useful ACLs provided by default. Only those used are allocated. */
752
753const struct {
754 const char *name;
755 const char *expr[4]; /* put enough for longest expression */
756} default_acl_list[] = {
Willy Tarreau58393e12008-07-20 10:39:22 +0200[diff] [blame]757 { .name = "TRUE", .expr = {"always_true",""}},
758 { .name = "FALSE", .expr = {"always_false",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]759 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]760 { .name = "HTTP", .expr = {"req_proto_http",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]761 { .name = "HTTP_1.0", .expr = {"req_ver","1.0",""}},
762 { .name = "HTTP_1.1", .expr = {"req_ver","1.1",""}},
763 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
764 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
765 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
766 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
767 { .name = "METH_POST", .expr = {"method","POST",""}},
768 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
769 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
770 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
771 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
772 { .name = "HTTP_CONTENT", .expr = {"hdr_val(content-length)","gt","0",""}},
Emeric Brunbede3d02009-06-30 17:54:00 +0200[diff] [blame]773 { .name = "RDP_COOKIE", .expr = {"req_rdp_cookie_cnt","gt","0",""}},
Willy Tarreauc6317702008-07-20 09:29:50 +0200[diff] [blame]774 { .name = "REQ_CONTENT", .expr = {"req_len","gt","0",""}},
Willy Tarreaub6fb4202008-07-20 11:18:28 +0200[diff] [blame]775 { .name = "WAIT_END", .expr = {"wait_end",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]776 { .name = NULL, .expr = {""}}
777};
778
779/* Find a default ACL from the default_acl list, compile it and return it.
780 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
781 * except when default ACLs are broken, in which case it will return NULL.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]782 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
783 * 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]784 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
785 * to report missing dependencies.
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]786 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]787static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
788 char **err, struct arg_list *al)
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]789{
790 __label__ out_return, out_free_acl_expr, out_free_name;
791 struct acl *cur_acl;
792 struct acl_expr *acl_expr;
793 char *name;
794 int index;
795
796 for (index = 0; default_acl_list[index].name != NULL; index++) {
797 if (strcmp(acl_name, default_acl_list[index].name) == 0)
798 break;
799 }
800
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]801 if (default_acl_list[index].name == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]802 memprintf(err, "no such ACL : '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]803 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]804 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]805
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]806 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]807 if (!acl_expr) {
808 /* parse_acl_expr must have filled err here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]809 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]810 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]811
812 name = strdup(acl_name);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]813 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]814 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]815 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]816 }
817
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]818 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]819 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]820 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]821 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]822 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]823
824 cur_acl->name = name;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]825 cur_acl->use |= acl_expr->smp->fetch->use;
826 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]827 LIST_INIT(&cur_acl->expr);
828 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
829 if (known_acl)
830 LIST_ADDQ(known_acl, &cur_acl->list);
831
832 return cur_acl;
833
834 out_free_name:
835 free(name);
836 out_free_acl_expr:
837 prune_acl_expr(acl_expr);
838 free(acl_expr);
839 out_return:
840 return NULL;
841}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]842
843/* Purge everything in the acl_cond <cond>, then return <cond>. */
844struct acl_cond *prune_acl_cond(struct acl_cond *cond)
845{
846 struct acl_term_suite *suite, *tmp_suite;
847 struct acl_term *term, *tmp_term;
848
849 /* iterate through all term suites and free all terms and all suites */
850 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
851 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
852 free(term);
853 free(suite);
854 }
855 return cond;
856}
857
858/* Parse an ACL condition starting at <args>[0], relying on a list of already
859 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]860 * case of low memory). Supports multiple conditions separated by "or". If
861 * <err> is not NULL, it will be filled with a pointer to an error message in
862 * case of error, that the caller is responsible for freeing. The initial
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]863 * location must either be freeable or NULL. The list <al> serves as a list head
864 * for unresolved dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]865 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]866struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]867 enum acl_cond_pol pol, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]868{
869 __label__ out_return, out_free_suite, out_free_term;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]870 int arg, neg;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]871 const char *word;
872 struct acl *cur_acl;
873 struct acl_term *cur_term;
874 struct acl_term_suite *cur_suite;
875 struct acl_cond *cond;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]876 unsigned int suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]877
878 cond = (struct acl_cond *)calloc(1, sizeof(*cond));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]879 if (cond == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]880 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]881 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]882 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]883
884 LIST_INIT(&cond->list);
885 LIST_INIT(&cond->suites);
886 cond->pol = pol;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]887 cond->val = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]888
889 cur_suite = NULL;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]890 suite_val = ~0U;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]891 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]892 for (arg = 0; *args[arg]; arg++) {
893 word = args[arg];
894
895 /* remove as many exclamation marks as we can */
896 while (*word == '!') {
897 neg = !neg;
898 word++;
899 }
900
901 /* an empty word is allowed because we cannot force the user to
902 * always think about not leaving exclamation marks alone.
903 */
904 if (!*word)
905 continue;
906
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]907 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]908 /* new term suite */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]909 cond->val |= suite_val;
910 suite_val = ~0U;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]911 cur_suite = NULL;
912 neg = 0;
913 continue;
914 }
915
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]916 if (strcmp(word, "{") == 0) {
917 /* we may have a complete ACL expression between two braces,
918 * find the last one.
919 */
920 int arg_end = arg + 1;
921 const char **args_new;
922
923 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
924 arg_end++;
925
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]926 if (!*args[arg_end]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]927 memprintf(err, "missing closing '}' in condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]928 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]929 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]930
931 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]932 if (!args_new) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]933 memprintf(err, "out of memory when parsing condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]934 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]935 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]936
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]937 args_new[0] = "";
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]938 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
939 args_new[arg_end - arg] = "";
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]940 cur_acl = parse_acl(args_new, known_acl, err, al);
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]941 free(args_new);
942
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]943 if (!cur_acl) {
944 /* note that parse_acl() must have filled <err> here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]945 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]946 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]947 word = args[arg + 1];
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]948 arg = arg_end;
949 }
950 else {
951 /* search for <word> in the known ACL names. If we do not find
952 * it, let's look for it in the default ACLs, and if found, add
953 * it to the list of ACLs of this proxy. This makes it possible
954 * to override them.
955 */
956 cur_acl = find_acl_by_name(word, known_acl);
957 if (cur_acl == NULL) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]958 cur_acl = find_acl_default(word, known_acl, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]959 if (cur_acl == NULL) {
960 /* note that find_acl_default() must have filled <err> here */
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]961 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]962 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]963 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]964 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]965
966 cur_term = (struct acl_term *)calloc(1, sizeof(*cur_term));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]967 if (cur_term == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]968 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]969 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]970 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]971
972 cur_term->acl = cur_acl;
973 cur_term->neg = neg;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]974
975 /* Here it is a bit complex. The acl_term_suite is a conjunction
976 * of many terms. It may only be used if all of its terms are
977 * usable at the same time. So the suite's validity domain is an
978 * AND between all ACL keywords' ones. But, the global condition
979 * is valid if at least one term suite is OK. So it's an OR between
980 * all of their validity domains. We could emit a warning as soon
981 * as suite_val is null because it means that the last ACL is not
982 * compatible with the previous ones. Let's remain simple for now.
983 */
984 cond->use |= cur_acl->use;
985 suite_val &= cur_acl->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]986
987 if (!cur_suite) {
988 cur_suite = (struct acl_term_suite *)calloc(1, sizeof(*cur_suite));
Willy Tarreauf678b7f2013-01-24 00:25:39 +0100[diff] [blame]989 if (cur_suite == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]990 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]991 goto out_free_term;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]992 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]993 LIST_INIT(&cur_suite->terms);
994 LIST_ADDQ(&cond->suites, &cur_suite->list);
995 }
996 LIST_ADDQ(&cur_suite->terms, &cur_term->list);
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]997 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]998 }
999
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1000 cond->val |= suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1001 return cond;
1002
1003 out_free_term:
1004 free(cur_term);
1005 out_free_suite:
1006 prune_acl_cond(cond);
1007 free(cond);
1008 out_return:
1009 return NULL;
1010}
1011
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1012/* Builds an ACL condition starting at the if/unless keyword. The complete
1013 * condition is returned. NULL is returned in case of error or if the first
1014 * word is neither "if" nor "unless". It automatically sets the file name and
Willy Tarreau25320b22013-03-24 07:22:08 +0100[diff] [blame]1015 * the line number in the condition for better error reporting, and sets the
1016 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1017 * be filled with a pointer to an error message in case of error, that the
1018 * caller is responsible for freeing. The initial location must either be
1019 * freeable or NULL.
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1020 */
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1021struct 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]1022{
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1023 enum acl_cond_pol pol = ACL_COND_NONE;
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1024 struct acl_cond *cond = NULL;
1025
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1026 if (err)
1027 *err = NULL;
1028
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1029 if (!strcmp(*args, "if")) {
1030 pol = ACL_COND_IF;
1031 args++;
1032 }
1033 else if (!strcmp(*args, "unless")) {
1034 pol = ACL_COND_UNLESS;
1035 args++;
1036 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1037 else {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]1038 memprintf(err, "conditions must start with either 'if' or 'unless'");
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1039 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1040 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1041
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1042 cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1043 if (!cond) {
1044 /* note that parse_acl_cond must have filled <err> here */
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1045 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1046 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1047
1048 cond->file = file;
1049 cond->line = line;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1050 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1051 return cond;
1052}
1053
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1054/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
1055 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1056 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1057 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
1058 * function only computes the condition, it does not apply the polarity required
1059 * 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]1060 *
1061 * res = acl_pass(res);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1062 * if (res == ACL_TEST_MISS)
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1063 * return 0;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1064 * if (cond->pol == ACL_COND_UNLESS)
1065 * res = !res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1066 */
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1067enum 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]1068{
1069 __label__ fetch_next;
1070 struct acl_term_suite *suite;
1071 struct acl_term *term;
1072 struct acl_expr *expr;
1073 struct acl *acl;
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1074 struct sample smp;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1075 enum acl_test_res acl_res, suite_res, cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1076
Willy Tarreau7a777ed2012-04-26 11:44:02 +0200[diff] [blame]1077 /* ACLs are iterated over all values, so let's always set the flag to
1078 * indicate this to the fetch functions.
1079 */
1080 opt |= SMP_OPT_ITERATE;
1081
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1082 /* We're doing a logical OR between conditions so we initialize to FAIL.
1083 * The MISS status is propagated down from the suites.
1084 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1085 cond_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1086 list_for_each_entry(suite, &cond->suites, list) {
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1087 /* Evaluate condition suite <suite>. We stop at the first term
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1088 * which returns ACL_TEST_FAIL. The MISS status is still propagated
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1089 * in case of uncertainty in the result.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1090 */
1091
1092 /* we're doing a logical AND between terms, so we must set the
1093 * initial value to PASS.
1094 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1095 suite_res = ACL_TEST_PASS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1096 list_for_each_entry(term, &suite->terms, list) {
1097 acl = term->acl;
1098
1099 /* FIXME: use cache !
1100 * check acl->cache_idx for this.
1101 */
1102
1103 /* ACL result not cached. Let's scan all the expressions
1104 * and use the first one to match.
1105 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1106 acl_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1107 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]1108 /* we need to reset context and flags */
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1109 memset(&smp, 0, sizeof(smp));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1110 fetch_next:
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1111 if (!sample_process(px, l4, l7, opt, expr->smp, &smp)) {
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1112 /* maybe we could not fetch because of missing data */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1113 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1114 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1115 continue;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1116 }
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]1117
Thierry FOURNIER1794fdf2014-01-17 15:25:13 +0100[diff] [blame]1118 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, 0));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1119 /*
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1120 * OK now acl_res holds the result of this expression
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1121 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1122 *
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1123 * Then if (!MISS) we can cache the result, and put
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1124 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1125 *
1126 * FIXME: implement cache.
1127 *
1128 */
1129
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1130 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1131 if (acl_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1132 break;
1133
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1134 if (smp.flags & SMP_F_NOT_LAST)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1135 goto fetch_next;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1136
1137 /* sometimes we know the fetched data is subject to change
1138 * later and give another chance for a new match (eg: request
1139 * size, time, ...)
1140 */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1141 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1142 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1143 }
1144 /*
1145 * Here we have the result of an ACL (cached or not).
1146 * ACLs are combined, negated or not, to form conditions.
1147 */
1148
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1149 if (term->neg)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1150 acl_res = acl_neg(acl_res);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1151
1152 suite_res &= acl_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1153
Willy Tarreau79c412b2013-10-30 19:30:32 +0100[diff] [blame]1154 /* we're ANDing these terms, so a single FAIL or MISS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1155 if (suite_res != ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1156 break;
1157 }
1158 cond_res |= suite_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1159
1160 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1161 if (cond_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1162 break;
1163 }
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1164 return cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1165}
1166
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1167/* Returns a pointer to the first ACL conflicting with usage at place <where>
1168 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
1169 * no conflict is found. Only full conflicts are detected (ACL is not usable).
1170 * Use the next function to check for useless keywords.
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1171 */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1172const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1173{
1174 struct acl_term_suite *suite;
1175 struct acl_term *term;
1176 struct acl *acl;
1177
1178 list_for_each_entry(suite, &cond->suites, list) {
1179 list_for_each_entry(term, &suite->terms, list) {
1180 acl = term->acl;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1181 if (!(acl->val & where))
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1182 return acl;
1183 }
1184 }
1185 return NULL;
1186}
1187
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1188/* Returns a pointer to the first ACL and its first keyword to conflict with
1189 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
1190 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
1191 * null), or false if not conflict is found. The first useless keyword is
1192 * returned.
1193 */
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1194int 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]1195{
1196 struct acl_term_suite *suite;
1197 struct acl_term *term;
1198 struct acl_expr *expr;
1199
1200 list_for_each_entry(suite, &cond->suites, list) {
1201 list_for_each_entry(term, &suite->terms, list) {
1202 list_for_each_entry(expr, &term->acl->expr, list) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1203 if (!(expr->smp->fetch->val & where)) {
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1204 if (acl)
1205 *acl = term->acl;
1206 if (kw)
1207 *kw = expr->kw;
1208 return 1;
1209 }
1210 }
1211 }
1212 }
1213 return 0;
1214}
1215
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1216/*
1217 * Find targets for userlist and groups in acl. Function returns the number
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1218 * of errors or OK if everything is fine. It must be called only once sample
1219 * fetch arguments have been resolved (after smp_resolve_args()).
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1220 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1221int acl_find_targets(struct proxy *p)
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1222{
1223
1224 struct acl *acl;
1225 struct acl_expr *expr;
Thierry FOURNIER3ead5b92013-12-13 12:12:18 +0100[diff] [blame]1226 struct pattern_list *pattern;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1227 int cfgerr = 0;
Thierry FOURNIERc5959fd2014-01-20 14:29:33 +0100[diff] [blame]1228 struct pattern_expr_list *pexp;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1229
1230 list_for_each_entry(acl, &p->acl, list) {
1231 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1232 if (!strcmp(expr->kw, "http_auth_group")) {
1233 /* Note: the ARGT_USR argument may only have been resolved earlier
1234 * by smp_resolve_args().
1235 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1236 if (expr->smp->arg_p->unresolved) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1237 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]1238 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]1239 cfgerr++;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]1240 continue;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1241 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1242
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1243 if (LIST_ISEMPTY(&expr->pat.head)) {
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1244 Alert("proxy %s: acl %s %s(): no groups specified.\n",
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1245 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1246 cfgerr++;
1247 continue;
1248 }
1249
Thierry FOURNIER9eec0a62014-01-22 18:38:02 +0100[diff] [blame]1250 /* For each pattern, check if the group exists. */
Thierry FOURNIERc5959fd2014-01-20 14:29:33 +0100[diff] [blame]1251 list_for_each_entry(pexp, &expr->pat.head, list) {
1252 if (LIST_ISEMPTY(&pexp->expr->patterns)) {
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1253 Alert("proxy %s: acl %s %s(): no groups specified.\n",
1254 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1255 cfgerr++;
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1256 continue;
1257 }
1258
Thierry FOURNIERc5959fd2014-01-20 14:29:33 +0100[diff] [blame]1259 list_for_each_entry(pattern, &pexp->expr->patterns, list) {
1260 /* this keyword only has one argument */
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1261 if (!check_group(expr->smp->arg_p->data.usr, pattern->pat.ptr.str)) {
1262 Alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
1263 p->id, acl->name, expr->kw, pattern->pat.ptr.str);
1264 cfgerr++;
1265 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1266 }
1267 }
1268 }
1269 }
1270 }
1271
1272 return cfgerr;
1273}
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1274
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]1275/* initializes ACLs by resolving the sample fetch names they rely upon.
1276 * Returns 0 on success, otherwise an error.
1277 */
1278int init_acl()
1279{
1280 int err = 0;
1281 int index;
1282 const char *name;
1283 struct acl_kw_list *kwl;
1284 struct sample_fetch *smp;
1285
1286 list_for_each_entry(kwl, &acl_keywords.list, list) {
1287 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1288 name = kwl->kw[index].fetch_kw;
1289 if (!name)
1290 name = kwl->kw[index].kw;
1291
1292 smp = find_sample_fetch(name, strlen(name));
1293 if (!smp) {
1294 Alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1295 kwl->kw[index].kw, name);
1296 err++;
1297 continue;
1298 }
1299 kwl->kw[index].smp = smp;
1300 }
1301 }
1302 return err;
1303}
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1304
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1305/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1306/* All supported sample and ACL keywords must be declared here. */
1307/************************************************************************/
1308
1309/* Note: must not be declared <const> as its list will be overwritten.
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]1310 * Please take care of keeping this list alphabetically sorted.
1311 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200[diff] [blame]1312static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1313 { /* END */ },
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1314}};
1315
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1316__attribute__((constructor))
1317static void __acl_init(void)
1318{
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1319 acl_register_keywords(&acl_kws);
1320}
1321
1322
1323/*
1324 * Local variables:
1325 * c-indent-level: 8
1326 * c-basic-offset: 8
1327 * End:
1328 */