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git01.mediatek.com / haproxy / c5a4e986390ccb096e1834bf7191184b13c55c4a / . / src / acl.c
blob: 29b158fae051639ed314223d7323adfba5a198e5 [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 */
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]134struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al,
135 const char *file, int line)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]136{
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]137 __label__ out_return, out_free_expr;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]138 struct acl_expr *expr;
139 struct acl_keyword *aclkw;
Thierry FOURNIER7148ce62013-12-06 19:06:43 +0100[diff] [blame]140 int patflags;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]141 const char *arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]142 struct sample_expr *smp = NULL;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]143 int idx = 0;
144 char *ckw = NULL;
145 const char *begw;
146 const char *endw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]147 const char *endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]148 unsigned long prev_type;
149 int cur_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]150 int nbargs;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]151 int operator = STD_OP_EQ;
152 int op;
153 int contain_colon, have_dot;
154 const char *dot;
155 signed long long value, minor;
156 /* The following buffer contain two numbers, a ':' separator and the final \0. */
157 char buffer[NB_LLMAX_STR + 1 + NB_LLMAX_STR + 1];
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]158 int is_loaded;
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]159 int unique_id;
160 char *error;
161 struct pat_ref *ref;
162 struct pattern_expr *pattern_expr;
Thierry FOURNIER9860c412014-01-29 14:23:29 +0100[diff] [blame]163 int load_as_map = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]164
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]165 /* First, we look for an ACL keyword. And if we don't find one, then
166 * we look for a sample fetch expression starting with a sample fetch
167 * keyword.
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]168 */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]169
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]170 al->ctx = ARGC_ACL; // to report errors while resolving args late
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]171 al->kw = *args;
172 al->conv = NULL;
173
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]174 aclkw = find_acl_kw(args[0]);
Willy Tarreau20490922014-03-17 18:04:27 +0100[diff] [blame]175 if (aclkw) {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]176 /* OK we have a real ACL keyword */
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]177
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]178 /* build new sample expression for this ACL */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]179 smp = calloc(1, sizeof(struct sample_expr));
180 if (!smp) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]181 memprintf(err, "out of memory when parsing ACL expression");
182 goto out_return;
183 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]184 LIST_INIT(&(smp->conv_exprs));
185 smp->fetch = aclkw->smp;
186 smp->arg_p = empty_arg_list;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]187
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]188 /* look for the begining of the subject arguments */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]189 for (arg = args[0]; *arg && *arg != '(' && *arg != ','; arg++);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]190
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]191 endt = arg;
192 if (*endt == '(') {
193 /* look for the end of this term and skip the opening parenthesis */
194 endt = ++arg;
195 while (*endt && *endt != ')')
196 endt++;
197 if (*endt != ')') {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]198 memprintf(err, "missing closing ')' after arguments to ACL keyword '%s'", aclkw->kw);
199 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]200 }
201 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]202
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]203 /* At this point, we have :
204 * - args[0] : beginning of the keyword
205 * - arg : end of the keyword, first character not part of keyword
206 * nor the opening parenthesis (so first character of args
207 * if present).
208 * - endt : end of the term (=arg or last parenthesis if args are present)
209 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]210 nbargs = make_arg_list(arg, endt - arg, smp->fetch->arg_mask, &smp->arg_p,
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]211 err, NULL, NULL, al);
212 if (nbargs < 0) {
213 /* note that make_arg_list will have set <err> here */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]214 memprintf(err, "ACL keyword '%s' : %s", aclkw->kw, *err);
215 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]216 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]217
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]218 if (!smp->arg_p) {
219 smp->arg_p = empty_arg_list;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]220 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]221 else if (smp->fetch->val_args && !smp->fetch->val_args(smp->arg_p, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]222 /* invalid keyword argument, error must have been
223 * set by val_args().
224 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]225 memprintf(err, "in argument to '%s', %s", aclkw->kw, *err);
226 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]227 }
228 arg = endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]229
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]230 /* look for the begining of the converters list. Those directly attached
231 * to the ACL keyword are found just after <arg> which points to the comma.
232 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]233 prev_type = smp->fetch->out_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]234 while (*arg) {
235 struct sample_conv *conv;
236 struct sample_conv_expr *conv_expr;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]237
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]238 if (*arg == ')') /* skip last closing parenthesis */
239 arg++;
240
241 if (*arg && *arg != ',') {
242 if (ckw)
243 memprintf(err, "ACL keyword '%s' : missing comma after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]244 aclkw->kw, ckw);
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]245 else
246 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]247 aclkw->kw);
248 goto out_free_smp;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]249 }
Willy Tarreauae52f062012-04-26 12:13:35 +0200[diff] [blame]250
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]251 while (*arg == ',') /* then trailing commas */
252 arg++;
Willy Tarreau2e845be2012-10-19 19:49:09 +0200[diff] [blame]253
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]254 begw = arg; /* start of conv keyword */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]255
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]256 if (!*begw)
257 /* none ? end of converters */
258 break;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]259
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]260 for (endw = begw; *endw && *endw != '(' && *endw != ','; endw++);
Willy Tarreau9ca69362013-10-22 19:10:06 +0200[diff] [blame]261
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]262 free(ckw);
263 ckw = my_strndup(begw, endw - begw);
Willy Tarreauf75d0082013-04-07 21:20:44 +0200[diff] [blame]264
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]265 conv = find_sample_conv(begw, endw - begw);
266 if (!conv) {
267 /* Unknown converter method */
268 memprintf(err, "ACL keyword '%s' : unknown conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]269 aclkw->kw, ckw);
270 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]271 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]272
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]273 arg = endw;
274 if (*arg == '(') {
275 /* look for the end of this term */
276 while (*arg && *arg != ')')
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]277 arg++;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]278 if (*arg != ')') {
279 memprintf(err, "ACL keyword '%s' : syntax error: missing ')' after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]280 aclkw->kw, ckw);
281 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]282 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]283 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]284
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]285 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
286 memprintf(err, "ACL keyword '%s' : returns type of conv method '%s' is unknown.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]287 aclkw->kw, ckw);
288 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]289 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]290
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]291 /* If impossible type conversion */
292 if (!sample_casts[prev_type][conv->in_type]) {
293 memprintf(err, "ACL keyword '%s' : conv method '%s' cannot be applied.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]294 aclkw->kw, ckw);
295 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]296 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]297
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]298 prev_type = conv->out_type;
299 conv_expr = calloc(1, sizeof(struct sample_conv_expr));
300 if (!conv_expr)
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]301 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]302
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]303 LIST_ADDQ(&(smp->conv_exprs), &(conv_expr->list));
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]304 conv_expr->conv = conv;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]305
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]306 if (arg != endw) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]307 int err_arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]308
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]309 if (!conv->arg_mask) {
310 memprintf(err, "ACL keyword '%s' : conv method '%s' does not support any args.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]311 aclkw->kw, ckw);
312 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]313 }
314
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]315 al->kw = smp->fetch->kw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]316 al->conv = conv_expr->conv->kw;
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]317 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]318 memprintf(err, "ACL keyword '%s' : invalid arg %d in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]319 aclkw->kw, err_arg+1, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]320 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]321 }
322
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]323 if (!conv_expr->arg_p)
324 conv_expr->arg_p = empty_arg_list;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]325
Thierry FOURNIEReeaa9512014-02-11 14:00:19 +0100[diff] [blame]326 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, file, line, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]327 memprintf(err, "ACL keyword '%s' : invalid args in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]328 aclkw->kw, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]329 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]330 }
331 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]332 else if (ARGM(conv->arg_mask)) {
333 memprintf(err, "ACL keyword '%s' : missing args for conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]334 aclkw->kw, ckw);
335 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]336 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]337 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]338 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]339 else {
340 /* This is not an ACL keyword, so we hope this is a sample fetch
341 * keyword that we're going to transparently use as an ACL. If
342 * so, we retrieve a completely parsed expression with args and
343 * convs already done.
344 */
Thierry FOURNIEReeaa9512014-02-11 14:00:19 +0100[diff] [blame]345 smp = sample_parse_expr((char **)args, &idx, file, line, err, al);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]346 if (!smp) {
347 memprintf(err, "%s in ACL expression '%s'", *err, *args);
348 goto out_return;
349 }
350 }
351
352 expr = (struct acl_expr *)calloc(1, sizeof(*expr));
353 if (!expr) {
354 memprintf(err, "out of memory when parsing ACL expression");
355 goto out_return;
356 }
357
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]358 pattern_init_head(&expr->pat);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]359
360 expr->kw = aclkw ? aclkw->kw : smp->fetch->kw;
361 expr->pat.parse = aclkw ? aclkw->parse : NULL;
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]362 expr->pat.index = aclkw ? aclkw->index : NULL;
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]363 expr->pat.match = aclkw ? aclkw->match : NULL;
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]364 expr->pat.delete = aclkw ? aclkw->delete : NULL;
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]365 expr->pat.prune = aclkw ? aclkw->prune : NULL;
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]366 expr->pat.expect_type = smp->fetch->out_type;
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]367 expr->smp = smp;
368 smp = NULL;
369
Thierry FOURNIERc5a4e982014-03-05 16:07:08 +0100[diff] [blame^]370 /* Fill NULL pointers with values provided by the pattern.c arrays */
371 if (aclkw) {
372 if (!expr->pat.parse)
373 expr->pat.parse = pat_parse_fcts[aclkw->match_type];
374
375 if (!expr->pat.index)
376 expr->pat.index = pat_index_fcts[aclkw->match_type];
377
378 if (!expr->pat.match)
379 expr->pat.match = pat_match_fcts[aclkw->match_type];
380
381 if (!expr->pat.delete)
382 expr->pat.delete = pat_delete_fcts[aclkw->match_type];
383
384 if (!expr->pat.prune)
385 expr->pat.prune = pat_prune_fcts[aclkw->match_type];
386 }
387
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]388 if (!expr->pat.parse) {
389 /* some types can be automatically converted */
390
391 switch (expr->smp ? expr->smp->fetch->out_type : aclkw->smp->out_type) {
392 case SMP_T_BOOL:
393 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]394 expr->pat.index = pat_index_fcts[PAT_MATCH_BOOL];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]395 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]396 expr->pat.delete = pat_delete_fcts[PAT_MATCH_BOOL];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]397 expr->pat.prune = pat_prune_fcts[PAT_MATCH_BOOL];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]398 expr->pat.expect_type = pat_match_types[PAT_MATCH_BOOL];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]399 break;
400 case SMP_T_SINT:
401 case SMP_T_UINT:
402 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]403 expr->pat.index = pat_index_fcts[PAT_MATCH_INT];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]404 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]405 expr->pat.delete = pat_delete_fcts[PAT_MATCH_INT];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]406 expr->pat.prune = pat_prune_fcts[PAT_MATCH_INT];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]407 expr->pat.expect_type = pat_match_types[PAT_MATCH_INT];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]408 break;
409 case SMP_T_IPV4:
410 case SMP_T_IPV6:
411 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]412 expr->pat.index = pat_index_fcts[PAT_MATCH_IP];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]413 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]414 expr->pat.delete = pat_delete_fcts[PAT_MATCH_IP];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]415 expr->pat.prune = pat_prune_fcts[PAT_MATCH_IP];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]416 expr->pat.expect_type = pat_match_types[PAT_MATCH_IP];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]417 break;
418 }
419 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]420
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]421 /* Additional check to protect against common mistakes */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]422 cur_type = smp_expr_output_type(expr->smp);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]423 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]424 Warning("parsing acl keyword '%s' :\n"
425 " no pattern to match against were provided, so this ACL will never match.\n"
426 " If this is what you intended, please add '--' to get rid of this warning.\n"
427 " If you intended to match only for existence, please use '-m found'.\n"
428 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
429 "\n",
430 args[0]);
431 }
432
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]433 args++;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]434
435 /* check for options before patterns. Supported options are :
436 * -i : ignore case for all patterns by default
437 * -f : read patterns from those files
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]438 * -m : force matching method (must be used before -f)
Thierry FOURNIER9860c412014-01-29 14:23:29 +0100[diff] [blame]439 * -M : load the file as map file
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]440 * -u : force the unique id of the acl
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]441 * -- : everything after this is not an option
442 */
443 patflags = 0;
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]444 is_loaded = 0;
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]445 unique_id = -1;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]446 while (**args == '-') {
447 if ((*args)[1] == 'i')
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]448 patflags |= PAT_F_IGNORE_CASE;
Thierry FOURNIERb7729c92014-02-11 16:24:41 +0100[diff] [blame]449 else if ((*args)[1] == 'n')
450 patflags |= PAT_F_NO_DNS;
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]451 else if ((*args)[1] == 'u') {
452 unique_id = strtol(args[1], &error, 10);
453 if (*error != '\0') {
454 memprintf(err, "the argument of -u must be an integer");
455 goto out_free_expr;
456 }
457
458 /* Check if this id is really unique. */
459 if (pat_ref_lookupid(unique_id)) {
460 memprintf(err, "the id is already used");
461 goto out_free_expr;
462 }
463
464 args++;
465 }
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]466 else if ((*args)[1] == 'f') {
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]467 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]468 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]469 goto out_free_expr;
470 }
471
Thierry FOURNIER66eb9bf2014-02-11 16:19:46 +0100[diff] [blame]472 if (!pattern_read_from_file(&expr->pat, PAT_REF_ACL, args[1], patflags, load_as_map, err, file, line))
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]473 goto out_free_expr;
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]474 is_loaded = 1;
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]475 args++;
476 }
477 else if ((*args)[1] == 'm') {
478 int idx;
479
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]480 if (is_loaded) {
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]481 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
482 goto out_free_expr;
483 }
484
Willy Tarreau6f8fe312013-11-28 22:24:25 +0100[diff] [blame]485 idx = pat_find_match_name(args[1]);
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]486 if (idx < 0) {
487 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
488 goto out_free_expr;
489 }
490
491 /* 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]492 if (!sample_casts[cur_type][pat_match_types[idx]]) {
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]493 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]494 goto out_free_expr;
495 }
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]496 expr->pat.parse = pat_parse_fcts[idx];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]497 expr->pat.index = pat_index_fcts[idx];
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]498 expr->pat.match = pat_match_fcts[idx];
Thierry FOURNIERb1136502014-01-15 11:38:49 +0100[diff] [blame]499 expr->pat.delete = pat_delete_fcts[idx];
Thierry FOURNIER6f7203d2014-01-14 16:24:51 +0100[diff] [blame]500 expr->pat.prune = pat_prune_fcts[idx];
Thierry FOURNIER5d344082014-01-27 14:19:53 +0100[diff] [blame]501 expr->pat.expect_type = pat_match_types[idx];
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]502 args++;
503 }
Thierry FOURNIER9860c412014-01-29 14:23:29 +0100[diff] [blame]504 else if ((*args)[1] == 'M') {
505 load_as_map = 1;
506 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]507 else if ((*args)[1] == '-') {
508 args++;
509 break;
510 }
511 else
512 break;
513 args++;
514 }
515
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]516 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]517 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]518 goto out_free_expr;
519 }
520
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]521 /* Create displayed reference */
522 snprintf(trash.str, trash.size, "acl '%s' file '%s' line %d", expr->kw, file, line);
523 trash.str[trash.size - 1] = '\0';
524
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]525 /* Create new patern reference. */
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]526 ref = pat_ref_newid(unique_id, trash.str, PAT_REF_ACL);
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]527 if (!ref) {
528 memprintf(err, "memory error");
529 goto out_free_expr;
530 }
531
532 /* Create new pattern expression associated to this reference. */
533 pattern_expr = pattern_new_expr(&expr->pat, ref, err);
534 if (!pattern_expr)
535 goto out_free_expr;
536
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]537 /* now parse all patterns */
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]538 while (**args) {
539 arg = *args;
540
541 /* Compatibility layer. Each pattern can parse only one string per pattern,
542 * but the pat_parser_int() and pat_parse_dotted_ver() parsers were need
543 * optionnaly two operators. The first operator is the match method: eq,
544 * le, lt, ge and gt. pat_parse_int() and pat_parse_dotted_ver() functions
545 * can have a compatibility syntax based on ranges:
546 *
547 * pat_parse_int():
548 *
549 * "eq x" -> "x" or "x:x"
550 * "le x" -> ":x"
551 * "lt x" -> ":y" (with y = x - 1)
552 * "ge x" -> "x:"
553 * "gt x" -> "y:" (with y = x + 1)
554 *
555 * pat_parse_dotted_ver():
556 *
557 * "eq x.y" -> "x.y" or "x.y:x.y"
558 * "le x.y" -> ":x.y"
559 * "lt x.y" -> ":w.z" (with w.z = x.y - 1)
560 * "ge x.y" -> "x.y:"
561 * "gt x.y" -> "w.z:" (with w.z = x.y + 1)
562 *
563 * If y is not present, assume that is "0".
564 *
565 * The syntax eq, le, lt, ge and gt are proper to the acl syntax. The
566 * following block of code detect the operator, and rewrite each value
567 * in parsable string.
568 */
569 if (expr->pat.parse == pat_parse_int ||
570 expr->pat.parse == pat_parse_dotted_ver) {
571 /* Check for operator. If the argument is operator, memorise it and
572 * continue to the next argument.
573 */
574 op = get_std_op(arg);
575 if (op != -1) {
576 operator = op;
577 args++;
578 continue;
579 }
580
581 /* Check if the pattern contain ':' or '-' character. */
582 contain_colon = (strchr(arg, ':') || strchr(arg, '-'));
583
584 /* If the pattern contain ':' or '-' character, give it to the parser as is.
585 * If no contain ':' and operator is STD_OP_EQ, give it to the parser as is.
586 * In other case, try to convert the value according with the operator.
587 */
588 if (!contain_colon && operator != STD_OP_EQ) {
589 /* Search '.' separator. */
590 dot = strchr(arg, '.');
591 if (!dot) {
592 have_dot = 0;
593 minor = 0;
594 dot = arg + strlen(arg);
595 }
596 else
597 have_dot = 1;
598
599 /* convert the integer minor part for the pat_parse_dotted_ver() function. */
600 if (expr->pat.parse == pat_parse_dotted_ver && have_dot) {
601 if (strl2llrc(dot+1, strlen(dot+1), &minor) != 0) {
602 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]603 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]604 }
605 if (minor >= 65536) {
606 memprintf(err, "'%s' contains too large a minor value", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]607 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]608 }
609 }
610
611 /* convert the integer value for the pat_parse_int() function, and the
612 * integer major part for the pat_parse_dotted_ver() function.
613 */
614 if (strl2llrc(arg, dot - arg, &value) != 0) {
615 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]616 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]617 }
618 if (expr->pat.parse == pat_parse_dotted_ver) {
619 if (value >= 65536) {
620 memprintf(err, "'%s' contains too large a major value", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]621 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]622 }
623 value = (value << 16) | (minor & 0xffff);
624 }
625
626 switch (operator) {
627
628 case STD_OP_EQ: /* this case is not possible. */
629 memprintf(err, "internal error");
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]630 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]631
632 case STD_OP_GT:
633 value++; /* gt = ge + 1 */
634
635 case STD_OP_GE:
636 if (expr->pat.parse == pat_parse_int)
637 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld:", value);
638 else
639 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld.%lld:",
640 value >> 16, value & 0xffff);
641 arg = buffer;
642 break;
643
644 case STD_OP_LT:
645 value--; /* lt = le - 1 */
646
647 case STD_OP_LE:
648 if (expr->pat.parse == pat_parse_int)
649 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld", value);
650 else
651 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld.%lld",
652 value >> 16, value & 0xffff);
653 arg = buffer;
654 break;
655 }
656 }
657 }
658
Thierry FOURNIER3534d882014-01-20 17:01:44 +0100[diff] [blame]659 /* Add sample to the reference, and try to compile it fior each pattern
660 * using this value.
661 */
662 if (!pat_ref_add(ref, arg, NULL, err))
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]663 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]664 args++;
665 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]666
667 return expr;
668
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]669 out_free_expr:
670 prune_acl_expr(expr);
671 free(expr);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]672 free(ckw);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]673 out_free_smp:
674 free(smp);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]675 out_return:
676 return NULL;
677}
678
Krzysztof Piotr Oledzkia643baf2008-05-29 23:53:44 +0200[diff] [blame]679/* Purge everything in the acl <acl>, then return <acl>. */
680struct acl *prune_acl(struct acl *acl) {
681
682 struct acl_expr *expr, *exprb;
683
684 free(acl->name);
685
686 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
687 LIST_DEL(&expr->list);
688 prune_acl_expr(expr);
689 free(expr);
690 }
691
692 return acl;
693}
694
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]695/* Parse an ACL with the name starting at <args>[0], and with a list of already
696 * 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]697 * 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]698 * an anonymous one and it won't be merged with any other one. If <err> is not
699 * NULL, it will be filled with an appropriate error. This pointer must be
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]700 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
701 * dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]702 *
703 * args syntax: <aclname> <acl_expr>
704 */
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]705struct acl *parse_acl(const char **args, struct list *known_acl, char **err, struct arg_list *al,
706 const char *file, int line)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]707{
708 __label__ out_return, out_free_acl_expr, out_free_name;
709 struct acl *cur_acl;
710 struct acl_expr *acl_expr;
711 char *name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]712 const char *pos;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]713
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]714 if (**args && (pos = invalid_char(*args))) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]715 memprintf(err, "invalid character in ACL name : '%c'", *pos);
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]716 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]717 }
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]718
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]719 acl_expr = parse_acl_expr(args + 1, err, al, file, line);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]720 if (!acl_expr) {
721 /* parse_acl_expr will have filled <err> here */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]722 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]723 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]724
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]725 /* Check for args beginning with an opening parenthesis just after the
726 * subject, as this is almost certainly a typo. Right now we can only
727 * emit a warning, so let's do so.
728 */
Krzysztof Piotr Oledzki4cdd8312009-10-05 00:23:35 +0200[diff] [blame]729 if (!strchr(args[1], '(') && *args[2] == '(')
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]730 Warning("parsing acl '%s' :\n"
731 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
732 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
733 " If you are really sure this is not an error, please insert '--' between the\n"
734 " match and the pattern to make this warning message disappear.\n",
735 args[0], args[1], args[2]);
736
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]737 if (*args[0])
738 cur_acl = find_acl_by_name(args[0], known_acl);
739 else
740 cur_acl = NULL;
741
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]742 if (!cur_acl) {
743 name = strdup(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]744 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]745 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]746 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]747 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]748 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]749 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]750 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]751 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]752 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]753
754 LIST_INIT(&cur_acl->expr);
755 LIST_ADDQ(known_acl, &cur_acl->list);
756 cur_acl->name = name;
757 }
758
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]759 /* We want to know what features the ACL needs (typically HTTP parsing),
760 * and where it may be used. If an ACL relies on multiple matches, it is
761 * OK if at least one of them may match in the context where it is used.
762 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]763 cur_acl->use |= acl_expr->smp->fetch->use;
764 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]765 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
766 return cur_acl;
767
768 out_free_name:
769 free(name);
770 out_free_acl_expr:
771 prune_acl_expr(acl_expr);
772 free(acl_expr);
773 out_return:
774 return NULL;
775}
776
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]777/* Some useful ACLs provided by default. Only those used are allocated. */
778
779const struct {
780 const char *name;
781 const char *expr[4]; /* put enough for longest expression */
782} default_acl_list[] = {
Willy Tarreau58393e12008-07-20 10:39:22 +0200[diff] [blame]783 { .name = "TRUE", .expr = {"always_true",""}},
784 { .name = "FALSE", .expr = {"always_false",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]785 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]786 { .name = "HTTP", .expr = {"req_proto_http",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]787 { .name = "HTTP_1.0", .expr = {"req_ver","1.0",""}},
788 { .name = "HTTP_1.1", .expr = {"req_ver","1.1",""}},
789 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
790 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
791 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
792 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
793 { .name = "METH_POST", .expr = {"method","POST",""}},
794 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
795 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
796 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
797 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
798 { .name = "HTTP_CONTENT", .expr = {"hdr_val(content-length)","gt","0",""}},
Emeric Brunbede3d02009-06-30 17:54:00 +0200[diff] [blame]799 { .name = "RDP_COOKIE", .expr = {"req_rdp_cookie_cnt","gt","0",""}},
Willy Tarreauc6317702008-07-20 09:29:50 +0200[diff] [blame]800 { .name = "REQ_CONTENT", .expr = {"req_len","gt","0",""}},
Willy Tarreaub6fb4202008-07-20 11:18:28 +0200[diff] [blame]801 { .name = "WAIT_END", .expr = {"wait_end",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]802 { .name = NULL, .expr = {""}}
803};
804
805/* Find a default ACL from the default_acl list, compile it and return it.
806 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
807 * except when default ACLs are broken, in which case it will return NULL.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]808 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
809 * 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]810 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
811 * to report missing dependencies.
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]812 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]813static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]814 char **err, struct arg_list *al,
815 const char *file, int line)
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]816{
817 __label__ out_return, out_free_acl_expr, out_free_name;
818 struct acl *cur_acl;
819 struct acl_expr *acl_expr;
820 char *name;
821 int index;
822
823 for (index = 0; default_acl_list[index].name != NULL; index++) {
824 if (strcmp(acl_name, default_acl_list[index].name) == 0)
825 break;
826 }
827
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]828 if (default_acl_list[index].name == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]829 memprintf(err, "no such ACL : '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]830 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]831 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]832
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]833 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al, file, line);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]834 if (!acl_expr) {
835 /* parse_acl_expr must have filled err here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]836 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]837 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]838
839 name = strdup(acl_name);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]840 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]841 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]842 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]843 }
844
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]845 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]846 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]847 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]848 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]849 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]850
851 cur_acl->name = name;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]852 cur_acl->use |= acl_expr->smp->fetch->use;
853 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]854 LIST_INIT(&cur_acl->expr);
855 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
856 if (known_acl)
857 LIST_ADDQ(known_acl, &cur_acl->list);
858
859 return cur_acl;
860
861 out_free_name:
862 free(name);
863 out_free_acl_expr:
864 prune_acl_expr(acl_expr);
865 free(acl_expr);
866 out_return:
867 return NULL;
868}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]869
870/* Purge everything in the acl_cond <cond>, then return <cond>. */
871struct acl_cond *prune_acl_cond(struct acl_cond *cond)
872{
873 struct acl_term_suite *suite, *tmp_suite;
874 struct acl_term *term, *tmp_term;
875
876 /* iterate through all term suites and free all terms and all suites */
877 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
878 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
879 free(term);
880 free(suite);
881 }
882 return cond;
883}
884
885/* Parse an ACL condition starting at <args>[0], relying on a list of already
886 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]887 * case of low memory). Supports multiple conditions separated by "or". If
888 * <err> is not NULL, it will be filled with a pointer to an error message in
889 * case of error, that the caller is responsible for freeing. The initial
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]890 * location must either be freeable or NULL. The list <al> serves as a list head
891 * for unresolved dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]892 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]893struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]894 enum acl_cond_pol pol, char **err, struct arg_list *al,
895 const char *file, int line)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]896{
897 __label__ out_return, out_free_suite, out_free_term;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]898 int arg, neg;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]899 const char *word;
900 struct acl *cur_acl;
901 struct acl_term *cur_term;
902 struct acl_term_suite *cur_suite;
903 struct acl_cond *cond;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]904 unsigned int suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]905
906 cond = (struct acl_cond *)calloc(1, sizeof(*cond));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]907 if (cond == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]908 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]909 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]910 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]911
912 LIST_INIT(&cond->list);
913 LIST_INIT(&cond->suites);
914 cond->pol = pol;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]915 cond->val = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]916
917 cur_suite = NULL;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]918 suite_val = ~0U;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]919 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]920 for (arg = 0; *args[arg]; arg++) {
921 word = args[arg];
922
923 /* remove as many exclamation marks as we can */
924 while (*word == '!') {
925 neg = !neg;
926 word++;
927 }
928
929 /* an empty word is allowed because we cannot force the user to
930 * always think about not leaving exclamation marks alone.
931 */
932 if (!*word)
933 continue;
934
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]935 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]936 /* new term suite */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]937 cond->val |= suite_val;
938 suite_val = ~0U;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]939 cur_suite = NULL;
940 neg = 0;
941 continue;
942 }
943
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]944 if (strcmp(word, "{") == 0) {
945 /* we may have a complete ACL expression between two braces,
946 * find the last one.
947 */
948 int arg_end = arg + 1;
949 const char **args_new;
950
951 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
952 arg_end++;
953
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]954 if (!*args[arg_end]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]955 memprintf(err, "missing closing '}' in condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]956 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]957 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]958
959 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]960 if (!args_new) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]961 memprintf(err, "out of memory when parsing condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]962 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]963 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]964
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]965 args_new[0] = "";
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]966 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
967 args_new[arg_end - arg] = "";
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]968 cur_acl = parse_acl(args_new, known_acl, err, al, file, line);
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]969 free(args_new);
970
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]971 if (!cur_acl) {
972 /* note that parse_acl() must have filled <err> here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]973 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]974 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]975 word = args[arg + 1];
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]976 arg = arg_end;
977 }
978 else {
979 /* search for <word> in the known ACL names. If we do not find
980 * it, let's look for it in the default ACLs, and if found, add
981 * it to the list of ACLs of this proxy. This makes it possible
982 * to override them.
983 */
984 cur_acl = find_acl_by_name(word, known_acl);
985 if (cur_acl == NULL) {
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]986 cur_acl = find_acl_default(word, known_acl, err, al, file, line);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]987 if (cur_acl == NULL) {
988 /* note that find_acl_default() must have filled <err> here */
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]989 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]990 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]991 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]992 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]993
994 cur_term = (struct acl_term *)calloc(1, sizeof(*cur_term));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]995 if (cur_term == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]996 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]997 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]998 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]999
1000 cur_term->acl = cur_acl;
1001 cur_term->neg = neg;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1002
1003 /* Here it is a bit complex. The acl_term_suite is a conjunction
1004 * of many terms. It may only be used if all of its terms are
1005 * usable at the same time. So the suite's validity domain is an
1006 * AND between all ACL keywords' ones. But, the global condition
1007 * is valid if at least one term suite is OK. So it's an OR between
1008 * all of their validity domains. We could emit a warning as soon
1009 * as suite_val is null because it means that the last ACL is not
1010 * compatible with the previous ones. Let's remain simple for now.
1011 */
1012 cond->use |= cur_acl->use;
1013 suite_val &= cur_acl->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1014
1015 if (!cur_suite) {
1016 cur_suite = (struct acl_term_suite *)calloc(1, sizeof(*cur_suite));
Willy Tarreauf678b7f2013-01-24 00:25:39 +0100[diff] [blame]1017 if (cur_suite == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]1018 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1019 goto out_free_term;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1020 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1021 LIST_INIT(&cur_suite->terms);
1022 LIST_ADDQ(&cond->suites, &cur_suite->list);
1023 }
1024 LIST_ADDQ(&cur_suite->terms, &cur_term->list);
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]1025 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1026 }
1027
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1028 cond->val |= suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1029 return cond;
1030
1031 out_free_term:
1032 free(cur_term);
1033 out_free_suite:
1034 prune_acl_cond(cond);
1035 free(cond);
1036 out_return:
1037 return NULL;
1038}
1039
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1040/* Builds an ACL condition starting at the if/unless keyword. The complete
1041 * condition is returned. NULL is returned in case of error or if the first
1042 * word is neither "if" nor "unless". It automatically sets the file name and
Willy Tarreau25320b22013-03-24 07:22:08 +0100[diff] [blame]1043 * the line number in the condition for better error reporting, and sets the
1044 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1045 * be filled with a pointer to an error message in case of error, that the
1046 * caller is responsible for freeing. The initial location must either be
1047 * freeable or NULL.
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1048 */
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1049struct 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]1050{
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1051 enum acl_cond_pol pol = ACL_COND_NONE;
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1052 struct acl_cond *cond = NULL;
1053
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1054 if (err)
1055 *err = NULL;
1056
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1057 if (!strcmp(*args, "if")) {
1058 pol = ACL_COND_IF;
1059 args++;
1060 }
1061 else if (!strcmp(*args, "unless")) {
1062 pol = ACL_COND_UNLESS;
1063 args++;
1064 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1065 else {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]1066 memprintf(err, "conditions must start with either 'if' or 'unless'");
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1067 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1068 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1069
Thierry FOURNIER0d6ba512014-02-11 03:31:34 +0100[diff] [blame]1070 cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args, file, line);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1071 if (!cond) {
1072 /* note that parse_acl_cond must have filled <err> here */
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1073 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]1074 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1075
1076 cond->file = file;
1077 cond->line = line;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1078 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]1079 return cond;
1080}
1081
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1082/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
1083 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1084 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1085 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
1086 * function only computes the condition, it does not apply the polarity required
1087 * 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]1088 *
1089 * res = acl_pass(res);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1090 * if (res == ACL_TEST_MISS)
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1091 * return 0;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1092 * if (cond->pol == ACL_COND_UNLESS)
1093 * res = !res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1094 */
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1095enum 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]1096{
1097 __label__ fetch_next;
1098 struct acl_term_suite *suite;
1099 struct acl_term *term;
1100 struct acl_expr *expr;
1101 struct acl *acl;
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1102 struct sample smp;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1103 enum acl_test_res acl_res, suite_res, cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1104
Willy Tarreau7a777ed2012-04-26 11:44:02 +0200[diff] [blame]1105 /* ACLs are iterated over all values, so let's always set the flag to
1106 * indicate this to the fetch functions.
1107 */
1108 opt |= SMP_OPT_ITERATE;
1109
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1110 /* We're doing a logical OR between conditions so we initialize to FAIL.
1111 * The MISS status is propagated down from the suites.
1112 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1113 cond_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1114 list_for_each_entry(suite, &cond->suites, list) {
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1115 /* Evaluate condition suite <suite>. We stop at the first term
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1116 * which returns ACL_TEST_FAIL. The MISS status is still propagated
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1117 * in case of uncertainty in the result.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1118 */
1119
1120 /* we're doing a logical AND between terms, so we must set the
1121 * initial value to PASS.
1122 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1123 suite_res = ACL_TEST_PASS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1124 list_for_each_entry(term, &suite->terms, list) {
1125 acl = term->acl;
1126
1127 /* FIXME: use cache !
1128 * check acl->cache_idx for this.
1129 */
1130
1131 /* ACL result not cached. Let's scan all the expressions
1132 * and use the first one to match.
1133 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1134 acl_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1135 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]1136 /* we need to reset context and flags */
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1137 memset(&smp, 0, sizeof(smp));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1138 fetch_next:
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1139 if (!sample_process(px, l4, l7, opt, expr->smp, &smp)) {
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1140 /* maybe we could not fetch because of missing data */
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 continue;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1144 }
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]1145
Thierry FOURNIER1794fdf2014-01-17 15:25:13 +0100[diff] [blame]1146 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, 0));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1147 /*
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1148 * OK now acl_res holds the result of this expression
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1149 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1150 *
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1151 * Then if (!MISS) we can cache the result, and put
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1152 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1153 *
1154 * FIXME: implement cache.
1155 *
1156 */
1157
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1158 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1159 if (acl_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1160 break;
1161
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1162 if (smp.flags & SMP_F_NOT_LAST)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1163 goto fetch_next;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1164
1165 /* sometimes we know the fetched data is subject to change
1166 * later and give another chance for a new match (eg: request
1167 * size, time, ...)
1168 */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1169 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1170 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1171 }
1172 /*
1173 * Here we have the result of an ACL (cached or not).
1174 * ACLs are combined, negated or not, to form conditions.
1175 */
1176
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1177 if (term->neg)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1178 acl_res = acl_neg(acl_res);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1179
1180 suite_res &= acl_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1181
Willy Tarreau79c412b2013-10-30 19:30:32 +0100[diff] [blame]1182 /* we're ANDing these terms, so a single FAIL or MISS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1183 if (suite_res != ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1184 break;
1185 }
1186 cond_res |= suite_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1187
1188 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1189 if (cond_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1190 break;
1191 }
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1192 return cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1193}
1194
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1195/* Returns a pointer to the first ACL conflicting with usage at place <where>
1196 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
1197 * no conflict is found. Only full conflicts are detected (ACL is not usable).
1198 * Use the next function to check for useless keywords.
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1199 */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1200const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1201{
1202 struct acl_term_suite *suite;
1203 struct acl_term *term;
1204 struct acl *acl;
1205
1206 list_for_each_entry(suite, &cond->suites, list) {
1207 list_for_each_entry(term, &suite->terms, list) {
1208 acl = term->acl;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1209 if (!(acl->val & where))
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1210 return acl;
1211 }
1212 }
1213 return NULL;
1214}
1215
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1216/* Returns a pointer to the first ACL and its first keyword to conflict with
1217 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
1218 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
1219 * null), or false if not conflict is found. The first useless keyword is
1220 * returned.
1221 */
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1222int 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]1223{
1224 struct acl_term_suite *suite;
1225 struct acl_term *term;
1226 struct acl_expr *expr;
1227
1228 list_for_each_entry(suite, &cond->suites, list) {
1229 list_for_each_entry(term, &suite->terms, list) {
1230 list_for_each_entry(expr, &term->acl->expr, list) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1231 if (!(expr->smp->fetch->val & where)) {
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1232 if (acl)
1233 *acl = term->acl;
1234 if (kw)
1235 *kw = expr->kw;
1236 return 1;
1237 }
1238 }
1239 }
1240 }
1241 return 0;
1242}
1243
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1244/*
1245 * Find targets for userlist and groups in acl. Function returns the number
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1246 * of errors or OK if everything is fine. It must be called only once sample
1247 * fetch arguments have been resolved (after smp_resolve_args()).
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1248 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1249int acl_find_targets(struct proxy *p)
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1250{
1251
1252 struct acl *acl;
1253 struct acl_expr *expr;
Thierry FOURNIER3ead5b92013-12-13 12:12:18 +0100[diff] [blame]1254 struct pattern_list *pattern;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1255 int cfgerr = 0;
Thierry FOURNIERc5959fd2014-01-20 14:29:33 +0100[diff] [blame]1256 struct pattern_expr_list *pexp;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1257
1258 list_for_each_entry(acl, &p->acl, list) {
1259 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1260 if (!strcmp(expr->kw, "http_auth_group")) {
1261 /* Note: the ARGT_USR argument may only have been resolved earlier
1262 * by smp_resolve_args().
1263 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1264 if (expr->smp->arg_p->unresolved) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1265 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]1266 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]1267 cfgerr++;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]1268 continue;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1269 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1270
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1271 if (LIST_ISEMPTY(&expr->pat.head)) {
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1272 Alert("proxy %s: acl %s %s(): no groups specified.\n",
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1273 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1274 cfgerr++;
1275 continue;
1276 }
1277
Thierry FOURNIER9eec0a62014-01-22 18:38:02 +0100[diff] [blame]1278 /* For each pattern, check if the group exists. */
Thierry FOURNIERc5959fd2014-01-20 14:29:33 +0100[diff] [blame]1279 list_for_each_entry(pexp, &expr->pat.head, list) {
1280 if (LIST_ISEMPTY(&pexp->expr->patterns)) {
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1281 Alert("proxy %s: acl %s %s(): no groups specified.\n",
1282 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1283 cfgerr++;
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1284 continue;
1285 }
1286
Thierry FOURNIERc5959fd2014-01-20 14:29:33 +0100[diff] [blame]1287 list_for_each_entry(pattern, &pexp->expr->patterns, list) {
1288 /* this keyword only has one argument */
Thierry FOURNIER1e00d382014-02-11 11:31:40 +0100[diff] [blame]1289 if (!check_group(expr->smp->arg_p->data.usr, pattern->pat.ptr.str)) {
1290 Alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
1291 p->id, acl->name, expr->kw, pattern->pat.ptr.str);
1292 cfgerr++;
1293 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1294 }
1295 }
1296 }
1297 }
1298 }
1299
1300 return cfgerr;
1301}
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1302
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]1303/* initializes ACLs by resolving the sample fetch names they rely upon.
1304 * Returns 0 on success, otherwise an error.
1305 */
1306int init_acl()
1307{
1308 int err = 0;
1309 int index;
1310 const char *name;
1311 struct acl_kw_list *kwl;
1312 struct sample_fetch *smp;
1313
1314 list_for_each_entry(kwl, &acl_keywords.list, list) {
1315 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1316 name = kwl->kw[index].fetch_kw;
1317 if (!name)
1318 name = kwl->kw[index].kw;
1319
1320 smp = find_sample_fetch(name, strlen(name));
1321 if (!smp) {
1322 Alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1323 kwl->kw[index].kw, name);
1324 err++;
1325 continue;
1326 }
1327 kwl->kw[index].smp = smp;
1328 }
1329 }
1330 return err;
1331}
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1332
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1333/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1334/* All supported sample and ACL keywords must be declared here. */
1335/************************************************************************/
1336
1337/* Note: must not be declared <const> as its list will be overwritten.
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]1338 * Please take care of keeping this list alphabetically sorted.
1339 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200[diff] [blame]1340static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1341 { /* END */ },
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1342}};
1343
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1344__attribute__((constructor))
1345static void __acl_init(void)
1346{
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1347 acl_register_keywords(&acl_kws);
1348}
1349
1350
1351/*
1352 * Local variables:
1353 * c-indent-level: 8
1354 * c-basic-offset: 8
1355 * End:
1356 */