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git01.mediatek.com / haproxy / 5338eea8ebe7198f421bb18efddb850695c39115 / . / src / acl.c
blob: 37fd8f4b6898dce3c8dab730117025427a52ac18 [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 FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]109 pattern_prune_expr(&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];
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]157
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]158 /* First, we look for an ACL keyword. And if we don't find one, then
159 * we look for a sample fetch expression starting with a sample fetch
160 * keyword.
Willy Tarreaubef91e72013-03-31 23:14:46 +0200[diff] [blame]161 */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]162
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]163 al->ctx = ARGC_ACL; // to report errors while resolving args late
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]164 al->kw = *args;
165 al->conv = NULL;
166
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]167 aclkw = find_acl_kw(args[0]);
Willy Tarreau20490922014-03-17 18:04:27 +0100[diff] [blame]168 if (aclkw) {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]169 /* OK we have a real ACL keyword */
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]170
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]171 /* build new sample expression for this ACL */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]172 smp = calloc(1, sizeof(struct sample_expr));
173 if (!smp) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]174 memprintf(err, "out of memory when parsing ACL expression");
175 goto out_return;
176 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]177 LIST_INIT(&(smp->conv_exprs));
178 smp->fetch = aclkw->smp;
179 smp->arg_p = empty_arg_list;
Willy Tarreau34db1082012-04-19 17:16:54 +0200[diff] [blame]180
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]181 /* look for the begining of the subject arguments */
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]182 for (arg = args[0]; *arg && *arg != '(' && *arg != ','; arg++);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]183
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]184 endt = arg;
185 if (*endt == '(') {
186 /* look for the end of this term and skip the opening parenthesis */
187 endt = ++arg;
188 while (*endt && *endt != ')')
189 endt++;
190 if (*endt != ')') {
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]191 memprintf(err, "missing closing ')' after arguments to ACL keyword '%s'", aclkw->kw);
192 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]193 }
194 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]195
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]196 /* At this point, we have :
197 * - args[0] : beginning of the keyword
198 * - arg : end of the keyword, first character not part of keyword
199 * nor the opening parenthesis (so first character of args
200 * if present).
201 * - endt : end of the term (=arg or last parenthesis if args are present)
202 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]203 nbargs = make_arg_list(arg, endt - arg, smp->fetch->arg_mask, &smp->arg_p,
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]204 err, NULL, NULL, al);
205 if (nbargs < 0) {
206 /* note that make_arg_list will have set <err> here */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]207 memprintf(err, "ACL keyword '%s' : %s", aclkw->kw, *err);
208 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]209 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]210
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]211 if (!smp->arg_p) {
212 smp->arg_p = empty_arg_list;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]213 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]214 else if (smp->fetch->val_args && !smp->fetch->val_args(smp->arg_p, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]215 /* invalid keyword argument, error must have been
216 * set by val_args().
217 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]218 memprintf(err, "in argument to '%s', %s", aclkw->kw, *err);
219 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]220 }
221 arg = endt;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]222
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]223 /* look for the begining of the converters list. Those directly attached
224 * to the ACL keyword are found just after <arg> which points to the comma.
225 */
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]226 prev_type = smp->fetch->out_type;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]227 while (*arg) {
228 struct sample_conv *conv;
229 struct sample_conv_expr *conv_expr;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]230
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]231 if (*arg == ')') /* skip last closing parenthesis */
232 arg++;
233
234 if (*arg && *arg != ',') {
235 if (ckw)
236 memprintf(err, "ACL keyword '%s' : missing comma after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]237 aclkw->kw, ckw);
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]238 else
239 memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]240 aclkw->kw);
241 goto out_free_smp;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]242 }
Willy Tarreauae52f062012-04-26 12:13:35 +0200[diff] [blame]243
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]244 while (*arg == ',') /* then trailing commas */
245 arg++;
Willy Tarreau2e845be2012-10-19 19:49:09 +0200[diff] [blame]246
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]247 begw = arg; /* start of conv keyword */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]248
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]249 if (!*begw)
250 /* none ? end of converters */
251 break;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]252
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]253 for (endw = begw; *endw && *endw != '(' && *endw != ','; endw++);
Willy Tarreau9ca69362013-10-22 19:10:06 +0200[diff] [blame]254
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]255 free(ckw);
256 ckw = my_strndup(begw, endw - begw);
Willy Tarreauf75d0082013-04-07 21:20:44 +0200[diff] [blame]257
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]258 conv = find_sample_conv(begw, endw - begw);
259 if (!conv) {
260 /* Unknown converter method */
261 memprintf(err, "ACL keyword '%s' : unknown conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]262 aclkw->kw, ckw);
263 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]264 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]265
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]266 arg = endw;
267 if (*arg == '(') {
268 /* look for the end of this term */
269 while (*arg && *arg != ')')
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]270 arg++;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]271 if (*arg != ')') {
272 memprintf(err, "ACL keyword '%s' : syntax error: missing ')' after conv keyword '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]273 aclkw->kw, ckw);
274 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]275 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]276 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]277
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]278 if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
279 memprintf(err, "ACL keyword '%s' : returns type of conv method '%s' is unknown.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]280 aclkw->kw, ckw);
281 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]282 }
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]283
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]284 /* If impossible type conversion */
285 if (!sample_casts[prev_type][conv->in_type]) {
286 memprintf(err, "ACL keyword '%s' : conv method '%s' cannot be applied.",
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 prev_type = conv->out_type;
292 conv_expr = calloc(1, sizeof(struct sample_conv_expr));
293 if (!conv_expr)
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]294 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]295
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]296 LIST_ADDQ(&(smp->conv_exprs), &(conv_expr->list));
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]297 conv_expr->conv = conv;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]298
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]299 if (arg != endw) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]300 int err_arg;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]301
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]302 if (!conv->arg_mask) {
303 memprintf(err, "ACL keyword '%s' : conv method '%s' does not support any args.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]304 aclkw->kw, ckw);
305 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]306 }
307
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]308 al->kw = smp->fetch->kw;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]309 al->conv = conv_expr->conv->kw;
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]310 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]311 memprintf(err, "ACL keyword '%s' : invalid arg %d in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]312 aclkw->kw, err_arg+1, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]313 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]314 }
315
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]316 if (!conv_expr->arg_p)
317 conv_expr->arg_p = empty_arg_list;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]318
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]319 if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, err)) {
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]320 memprintf(err, "ACL keyword '%s' : invalid args in conv method '%s' : %s.",
Willy Tarreauadaddc22013-12-13 01:30:22 +0100[diff] [blame]321 aclkw->kw, ckw, *err);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]322 goto out_free_smp;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]323 }
324 }
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]325 else if (ARGM(conv->arg_mask)) {
326 memprintf(err, "ACL keyword '%s' : missing args for conv method '%s'.",
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]327 aclkw->kw, ckw);
328 goto out_free_smp;
Willy Tarreau131b4662013-12-13 01:08:36 +0100[diff] [blame]329 }
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]330 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]331 }
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]332 else {
333 /* This is not an ACL keyword, so we hope this is a sample fetch
334 * keyword that we're going to transparently use as an ACL. If
335 * so, we retrieve a completely parsed expression with args and
336 * convs already done.
337 */
338 smp = sample_parse_expr((char **)args, &idx, err, al);
339 if (!smp) {
340 memprintf(err, "%s in ACL expression '%s'", *err, *args);
341 goto out_return;
342 }
343 }
344
345 expr = (struct acl_expr *)calloc(1, sizeof(*expr));
346 if (!expr) {
347 memprintf(err, "out of memory when parsing ACL expression");
348 goto out_return;
349 }
350
351 pattern_init_expr(&expr->pat);
352
353 expr->kw = aclkw ? aclkw->kw : smp->fetch->kw;
354 expr->pat.parse = aclkw ? aclkw->parse : NULL;
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]355 expr->pat.index = aclkw ? aclkw->index : NULL;
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]356 expr->pat.match = aclkw ? aclkw->match : NULL;
357 expr->smp = smp;
358 smp = NULL;
359
360 if (!expr->pat.parse) {
361 /* some types can be automatically converted */
362
363 switch (expr->smp ? expr->smp->fetch->out_type : aclkw->smp->out_type) {
364 case SMP_T_BOOL:
365 expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]366 expr->pat.index = pat_index_fcts[PAT_MATCH_BOOL];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]367 expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
368 break;
369 case SMP_T_SINT:
370 case SMP_T_UINT:
371 expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]372 expr->pat.index = pat_index_fcts[PAT_MATCH_INT];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]373 expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
374 break;
375 case SMP_T_IPV4:
376 case SMP_T_IPV6:
377 expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]378 expr->pat.index = pat_index_fcts[PAT_MATCH_IP];
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]379 expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
380 break;
381 }
382 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]383
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]384 /* Additional check to protect against common mistakes */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]385 cur_type = smp_expr_output_type(expr->smp);
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]386 if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
Willy Tarreau3c3dfd52013-11-04 18:09:12 +0100[diff] [blame]387 Warning("parsing acl keyword '%s' :\n"
388 " no pattern to match against were provided, so this ACL will never match.\n"
389 " If this is what you intended, please add '--' to get rid of this warning.\n"
390 " If you intended to match only for existence, please use '-m found'.\n"
391 " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
392 "\n",
393 args[0]);
394 }
395
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]396 args++;
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]397
398 /* check for options before patterns. Supported options are :
399 * -i : ignore case for all patterns by default
400 * -f : read patterns from those files
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]401 * -m : force matching method (must be used before -f)
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]402 * -- : everything after this is not an option
403 */
404 patflags = 0;
405 while (**args == '-') {
406 if ((*args)[1] == 'i')
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]407 patflags |= PAT_F_IGNORE_CASE;
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]408 else if ((*args)[1] == 'f') {
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]409 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]410 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]411 goto out_free_expr;
412 }
413
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]414 if (!pattern_read_from_file(&expr->pat, args[1], patflags | PAT_F_FROM_FILE, err))
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]415 goto out_free_expr;
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]416 args++;
417 }
418 else if ((*args)[1] == 'm') {
419 int idx;
420
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]421 if (!LIST_ISEMPTY(&expr->pat.patterns) || !eb_is_empty(&expr->pat.pattern_tree)) {
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]422 memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
423 goto out_free_expr;
424 }
425
Willy Tarreau6f8fe312013-11-28 22:24:25 +0100[diff] [blame]426 idx = pat_find_match_name(args[1]);
Willy Tarreau5adeda12013-03-31 22:13:34 +0200[diff] [blame]427 if (idx < 0) {
428 memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
429 goto out_free_expr;
430 }
431
432 /* 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]433 if (!sample_casts[cur_type][pat_match_types[idx]]) {
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]434 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]435 goto out_free_expr;
436 }
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]437 expr->pat.parse = pat_parse_fcts[idx];
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]438 expr->pat.index = pat_index_fcts[idx];
Thierry FOURNIERe3ded592013-12-06 15:36:54 +0100[diff] [blame]439 expr->pat.match = pat_match_fcts[idx];
Willy Tarreau2b5285d2010-05-09 23:45:24 +0200[diff] [blame]440 args++;
441 }
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]442 else if ((*args)[1] == '-') {
443 args++;
444 break;
445 }
446 else
447 break;
448 args++;
449 }
450
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]451 if (!expr->pat.parse) {
Willy Tarreau9987ea92013-06-11 21:09:06 +0200[diff] [blame]452 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]453 goto out_free_expr;
454 }
455
Willy Tarreauc8d7c962007-06-17 08:20:33 +0200[diff] [blame]456 /* now parse all patterns */
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]457 while (**args) {
458 arg = *args;
459
460 /* Compatibility layer. Each pattern can parse only one string per pattern,
461 * but the pat_parser_int() and pat_parse_dotted_ver() parsers were need
462 * optionnaly two operators. The first operator is the match method: eq,
463 * le, lt, ge and gt. pat_parse_int() and pat_parse_dotted_ver() functions
464 * can have a compatibility syntax based on ranges:
465 *
466 * pat_parse_int():
467 *
468 * "eq x" -> "x" or "x:x"
469 * "le x" -> ":x"
470 * "lt x" -> ":y" (with y = x - 1)
471 * "ge x" -> "x:"
472 * "gt x" -> "y:" (with y = x + 1)
473 *
474 * pat_parse_dotted_ver():
475 *
476 * "eq x.y" -> "x.y" or "x.y:x.y"
477 * "le x.y" -> ":x.y"
478 * "lt x.y" -> ":w.z" (with w.z = x.y - 1)
479 * "ge x.y" -> "x.y:"
480 * "gt x.y" -> "w.z:" (with w.z = x.y + 1)
481 *
482 * If y is not present, assume that is "0".
483 *
484 * The syntax eq, le, lt, ge and gt are proper to the acl syntax. The
485 * following block of code detect the operator, and rewrite each value
486 * in parsable string.
487 */
488 if (expr->pat.parse == pat_parse_int ||
489 expr->pat.parse == pat_parse_dotted_ver) {
490 /* Check for operator. If the argument is operator, memorise it and
491 * continue to the next argument.
492 */
493 op = get_std_op(arg);
494 if (op != -1) {
495 operator = op;
496 args++;
497 continue;
498 }
499
500 /* Check if the pattern contain ':' or '-' character. */
501 contain_colon = (strchr(arg, ':') || strchr(arg, '-'));
502
503 /* If the pattern contain ':' or '-' character, give it to the parser as is.
504 * If no contain ':' and operator is STD_OP_EQ, give it to the parser as is.
505 * In other case, try to convert the value according with the operator.
506 */
507 if (!contain_colon && operator != STD_OP_EQ) {
508 /* Search '.' separator. */
509 dot = strchr(arg, '.');
510 if (!dot) {
511 have_dot = 0;
512 minor = 0;
513 dot = arg + strlen(arg);
514 }
515 else
516 have_dot = 1;
517
518 /* convert the integer minor part for the pat_parse_dotted_ver() function. */
519 if (expr->pat.parse == pat_parse_dotted_ver && have_dot) {
520 if (strl2llrc(dot+1, strlen(dot+1), &minor) != 0) {
521 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]522 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]523 }
524 if (minor >= 65536) {
525 memprintf(err, "'%s' contains too large a minor value", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]526 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]527 }
528 }
529
530 /* convert the integer value for the pat_parse_int() function, and the
531 * integer major part for the pat_parse_dotted_ver() function.
532 */
533 if (strl2llrc(arg, dot - arg, &value) != 0) {
534 memprintf(err, "'%s' is neither a number nor a supported operator", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]535 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]536 }
537 if (expr->pat.parse == pat_parse_dotted_ver) {
538 if (value >= 65536) {
539 memprintf(err, "'%s' contains too large a major value", arg);
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]540 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]541 }
542 value = (value << 16) | (minor & 0xffff);
543 }
544
545 switch (operator) {
546
547 case STD_OP_EQ: /* this case is not possible. */
548 memprintf(err, "internal error");
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]549 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]550
551 case STD_OP_GT:
552 value++; /* gt = ge + 1 */
553
554 case STD_OP_GE:
555 if (expr->pat.parse == pat_parse_int)
556 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld:", value);
557 else
558 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld.%lld:",
559 value >> 16, value & 0xffff);
560 arg = buffer;
561 break;
562
563 case STD_OP_LT:
564 value--; /* lt = le - 1 */
565
566 case STD_OP_LE:
567 if (expr->pat.parse == pat_parse_int)
568 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld", value);
569 else
570 snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld.%lld",
571 value >> 16, value & 0xffff);
572 arg = buffer;
573 break;
574 }
575 }
576 }
577
Thierry FOURNIERb9b08462013-12-13 15:12:32 +0100[diff] [blame]578 if (!pattern_register(&expr->pat, arg, NULL, patflags, err))
579 goto out_free_expr;
Thierry FOURNIER511e9472014-01-23 17:40:34 +0100[diff] [blame]580 args++;
581 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]582
583 return expr;
584
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]585 out_free_expr:
586 prune_acl_expr(expr);
587 free(expr);
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]588 free(ckw);
Willy Tarreauc37a3c72013-12-13 01:24:09 +0100[diff] [blame]589 out_free_smp:
590 free(smp);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]591 out_return:
592 return NULL;
593}
594
Krzysztof Piotr Oledzkia643baf2008-05-29 23:53:44 +0200[diff] [blame]595/* Purge everything in the acl <acl>, then return <acl>. */
596struct acl *prune_acl(struct acl *acl) {
597
598 struct acl_expr *expr, *exprb;
599
600 free(acl->name);
601
602 list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
603 LIST_DEL(&expr->list);
604 prune_acl_expr(expr);
605 free(expr);
606 }
607
608 return acl;
609}
610
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]611/* Parse an ACL with the name starting at <args>[0], and with a list of already
612 * 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]613 * 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]614 * an anonymous one and it won't be merged with any other one. If <err> is not
615 * NULL, it will be filled with an appropriate error. This pointer must be
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]616 * freeable or NULL. <al> is the arg_list serving as a head for unresolved
617 * dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]618 *
619 * args syntax: <aclname> <acl_expr>
620 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]621struct 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]622{
623 __label__ out_return, out_free_acl_expr, out_free_name;
624 struct acl *cur_acl;
625 struct acl_expr *acl_expr;
626 char *name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]627 const char *pos;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]628
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]629 if (**args && (pos = invalid_char(*args))) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]630 memprintf(err, "invalid character in ACL name : '%c'", *pos);
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]631 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]632 }
Willy Tarreau2e74c3f2007-12-02 18:45:09 +0100[diff] [blame]633
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]634 acl_expr = parse_acl_expr(args + 1, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]635 if (!acl_expr) {
636 /* parse_acl_expr will have filled <err> here */
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]637 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]638 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]639
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]640 /* Check for args beginning with an opening parenthesis just after the
641 * subject, as this is almost certainly a typo. Right now we can only
642 * emit a warning, so let's do so.
643 */
Krzysztof Piotr Oledzki4cdd8312009-10-05 00:23:35 +0200[diff] [blame]644 if (!strchr(args[1], '(') && *args[2] == '(')
Willy Tarreau404e8ab2009-07-26 19:40:40 +0200[diff] [blame]645 Warning("parsing acl '%s' :\n"
646 " matching '%s' for pattern '%s' is likely a mistake and probably\n"
647 " not what you want. Maybe you need to remove the extraneous space before '('.\n"
648 " If you are really sure this is not an error, please insert '--' between the\n"
649 " match and the pattern to make this warning message disappear.\n",
650 args[0], args[1], args[2]);
651
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]652 if (*args[0])
653 cur_acl = find_acl_by_name(args[0], known_acl);
654 else
655 cur_acl = NULL;
656
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]657 if (!cur_acl) {
658 name = strdup(args[0]);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]659 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]660 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]661 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]662 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]663 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]664 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]665 memprintf(err, "out of memory when parsing ACL");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]666 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]667 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]668
669 LIST_INIT(&cur_acl->expr);
670 LIST_ADDQ(known_acl, &cur_acl->list);
671 cur_acl->name = name;
672 }
673
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]674 /* We want to know what features the ACL needs (typically HTTP parsing),
675 * and where it may be used. If an ACL relies on multiple matches, it is
676 * OK if at least one of them may match in the context where it is used.
677 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]678 cur_acl->use |= acl_expr->smp->fetch->use;
679 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]680 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
681 return cur_acl;
682
683 out_free_name:
684 free(name);
685 out_free_acl_expr:
686 prune_acl_expr(acl_expr);
687 free(acl_expr);
688 out_return:
689 return NULL;
690}
691
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]692/* Some useful ACLs provided by default. Only those used are allocated. */
693
694const struct {
695 const char *name;
696 const char *expr[4]; /* put enough for longest expression */
697} default_acl_list[] = {
Willy Tarreau58393e12008-07-20 10:39:22 +0200[diff] [blame]698 { .name = "TRUE", .expr = {"always_true",""}},
699 { .name = "FALSE", .expr = {"always_false",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]700 { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8",""}},
Willy Tarreau2492d5b2009-07-11 00:06:00 +0200[diff] [blame]701 { .name = "HTTP", .expr = {"req_proto_http",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]702 { .name = "HTTP_1.0", .expr = {"req_ver","1.0",""}},
703 { .name = "HTTP_1.1", .expr = {"req_ver","1.1",""}},
704 { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
705 { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
706 { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
707 { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
708 { .name = "METH_POST", .expr = {"method","POST",""}},
709 { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
710 { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
711 { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
712 { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
713 { .name = "HTTP_CONTENT", .expr = {"hdr_val(content-length)","gt","0",""}},
Emeric Brunbede3d02009-06-30 17:54:00 +0200[diff] [blame]714 { .name = "RDP_COOKIE", .expr = {"req_rdp_cookie_cnt","gt","0",""}},
Willy Tarreauc6317702008-07-20 09:29:50 +0200[diff] [blame]715 { .name = "REQ_CONTENT", .expr = {"req_len","gt","0",""}},
Willy Tarreaub6fb4202008-07-20 11:18:28 +0200[diff] [blame]716 { .name = "WAIT_END", .expr = {"wait_end",""}},
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]717 { .name = NULL, .expr = {""}}
718};
719
720/* Find a default ACL from the default_acl list, compile it and return it.
721 * If the ACL is not found, NULL is returned. In theory, it cannot fail,
722 * except when default ACLs are broken, in which case it will return NULL.
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]723 * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
724 * 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]725 * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
726 * to report missing dependencies.
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]727 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]728static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
729 char **err, struct arg_list *al)
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]730{
731 __label__ out_return, out_free_acl_expr, out_free_name;
732 struct acl *cur_acl;
733 struct acl_expr *acl_expr;
734 char *name;
735 int index;
736
737 for (index = 0; default_acl_list[index].name != NULL; index++) {
738 if (strcmp(acl_name, default_acl_list[index].name) == 0)
739 break;
740 }
741
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]742 if (default_acl_list[index].name == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]743 memprintf(err, "no such ACL : '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]744 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]745 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]746
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]747 acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]748 if (!acl_expr) {
749 /* parse_acl_expr must have filled err here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]750 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]751 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]752
753 name = strdup(acl_name);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]754 if (!name) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]755 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]756 goto out_free_acl_expr;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]757 }
758
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]759 cur_acl = (struct acl *)calloc(1, sizeof(*cur_acl));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]760 if (cur_acl == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]761 memprintf(err, "out of memory when building default ACL '%s'", acl_name);
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]762 goto out_free_name;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]763 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]764
765 cur_acl->name = name;
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]766 cur_acl->use |= acl_expr->smp->fetch->use;
767 cur_acl->val |= acl_expr->smp->fetch->val;
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]768 LIST_INIT(&cur_acl->expr);
769 LIST_ADDQ(&cur_acl->expr, &acl_expr->list);
770 if (known_acl)
771 LIST_ADDQ(known_acl, &cur_acl->list);
772
773 return cur_acl;
774
775 out_free_name:
776 free(name);
777 out_free_acl_expr:
778 prune_acl_expr(acl_expr);
779 free(acl_expr);
780 out_return:
781 return NULL;
782}
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]783
784/* Purge everything in the acl_cond <cond>, then return <cond>. */
785struct acl_cond *prune_acl_cond(struct acl_cond *cond)
786{
787 struct acl_term_suite *suite, *tmp_suite;
788 struct acl_term *term, *tmp_term;
789
790 /* iterate through all term suites and free all terms and all suites */
791 list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
792 list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
793 free(term);
794 free(suite);
795 }
796 return cond;
797}
798
799/* Parse an ACL condition starting at <args>[0], relying on a list of already
800 * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]801 * case of low memory). Supports multiple conditions separated by "or". If
802 * <err> is not NULL, it will be filled with a pointer to an error message in
803 * case of error, that the caller is responsible for freeing. The initial
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]804 * location must either be freeable or NULL. The list <al> serves as a list head
805 * for unresolved dependencies.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]806 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]807struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]808 enum acl_cond_pol pol, char **err, struct arg_list *al)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]809{
810 __label__ out_return, out_free_suite, out_free_term;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]811 int arg, neg;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]812 const char *word;
813 struct acl *cur_acl;
814 struct acl_term *cur_term;
815 struct acl_term_suite *cur_suite;
816 struct acl_cond *cond;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]817 unsigned int suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]818
819 cond = (struct acl_cond *)calloc(1, sizeof(*cond));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]820 if (cond == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]821 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]822 goto out_return;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]823 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]824
825 LIST_INIT(&cond->list);
826 LIST_INIT(&cond->suites);
827 cond->pol = pol;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]828 cond->val = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]829
830 cur_suite = NULL;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]831 suite_val = ~0U;
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]832 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]833 for (arg = 0; *args[arg]; arg++) {
834 word = args[arg];
835
836 /* remove as many exclamation marks as we can */
837 while (*word == '!') {
838 neg = !neg;
839 word++;
840 }
841
842 /* an empty word is allowed because we cannot force the user to
843 * always think about not leaving exclamation marks alone.
844 */
845 if (!*word)
846 continue;
847
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]848 if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]849 /* new term suite */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]850 cond->val |= suite_val;
851 suite_val = ~0U;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]852 cur_suite = NULL;
853 neg = 0;
854 continue;
855 }
856
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]857 if (strcmp(word, "{") == 0) {
858 /* we may have a complete ACL expression between two braces,
859 * find the last one.
860 */
861 int arg_end = arg + 1;
862 const char **args_new;
863
864 while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
865 arg_end++;
866
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]867 if (!*args[arg_end]) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]868 memprintf(err, "missing closing '}' in condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]869 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]870 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]871
872 args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]873 if (!args_new) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]874 memprintf(err, "out of memory when parsing condition");
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]875 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]876 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]877
Willy Tarreau2a56c5e2010-03-15 16:13:29 +0100[diff] [blame]878 args_new[0] = "";
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]879 memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
880 args_new[arg_end - arg] = "";
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]881 cur_acl = parse_acl(args_new, known_acl, err, al);
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]882 free(args_new);
883
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]884 if (!cur_acl) {
885 /* note that parse_acl() must have filled <err> here */
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]886 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]887 }
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]888 word = args[arg + 1];
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]889 arg = arg_end;
890 }
891 else {
892 /* search for <word> in the known ACL names. If we do not find
893 * it, let's look for it in the default ACLs, and if found, add
894 * it to the list of ACLs of this proxy. This makes it possible
895 * to override them.
896 */
897 cur_acl = find_acl_by_name(word, known_acl);
898 if (cur_acl == NULL) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]899 cur_acl = find_acl_default(word, known_acl, err, al);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]900 if (cur_acl == NULL) {
901 /* note that find_acl_default() must have filled <err> here */
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]902 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]903 }
Willy Tarreau95fa4692010-02-01 13:05:50 +0100[diff] [blame]904 }
Willy Tarreau16fbe822007-06-17 11:54:31 +0200[diff] [blame]905 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]906
907 cur_term = (struct acl_term *)calloc(1, sizeof(*cur_term));
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]908 if (cur_term == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]909 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]910 goto out_free_suite;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]911 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]912
913 cur_term->acl = cur_acl;
914 cur_term->neg = neg;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]915
916 /* Here it is a bit complex. The acl_term_suite is a conjunction
917 * of many terms. It may only be used if all of its terms are
918 * usable at the same time. So the suite's validity domain is an
919 * AND between all ACL keywords' ones. But, the global condition
920 * is valid if at least one term suite is OK. So it's an OR between
921 * all of their validity domains. We could emit a warning as soon
922 * as suite_val is null because it means that the last ACL is not
923 * compatible with the previous ones. Let's remain simple for now.
924 */
925 cond->use |= cur_acl->use;
926 suite_val &= cur_acl->val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]927
928 if (!cur_suite) {
929 cur_suite = (struct acl_term_suite *)calloc(1, sizeof(*cur_suite));
Willy Tarreauf678b7f2013-01-24 00:25:39 +0100[diff] [blame]930 if (cur_suite == NULL) {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]931 memprintf(err, "out of memory when parsing condition");
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]932 goto out_free_term;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]933 }
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]934 LIST_INIT(&cur_suite->terms);
935 LIST_ADDQ(&cond->suites, &cur_suite->list);
936 }
937 LIST_ADDQ(&cur_suite->terms, &cur_term->list);
Willy Tarreau74b98a82007-06-16 19:35:18 +0200[diff] [blame]938 neg = 0;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]939 }
940
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]941 cond->val |= suite_val;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]942 return cond;
943
944 out_free_term:
945 free(cur_term);
946 out_free_suite:
947 prune_acl_cond(cond);
948 free(cond);
949 out_return:
950 return NULL;
951}
952
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]953/* Builds an ACL condition starting at the if/unless keyword. The complete
954 * condition is returned. NULL is returned in case of error or if the first
955 * word is neither "if" nor "unless". It automatically sets the file name and
Willy Tarreau25320b22013-03-24 07:22:08 +0100[diff] [blame]956 * the line number in the condition for better error reporting, and sets the
957 * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]958 * be filled with a pointer to an error message in case of error, that the
959 * caller is responsible for freeing. The initial location must either be
960 * freeable or NULL.
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]961 */
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]962struct 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]963{
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]964 enum acl_cond_pol pol = ACL_COND_NONE;
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]965 struct acl_cond *cond = NULL;
966
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]967 if (err)
968 *err = NULL;
969
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]970 if (!strcmp(*args, "if")) {
971 pol = ACL_COND_IF;
972 args++;
973 }
974 else if (!strcmp(*args, "unless")) {
975 pol = ACL_COND_UNLESS;
976 args++;
977 }
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]978 else {
Willy Tarreaueb6cead2012-09-20 19:43:14 +0200[diff] [blame]979 memprintf(err, "conditions must start with either 'if' or 'unless'");
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]980 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]981 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]982
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]983 cond = parse_acl_cond(args, &px->acl, pol, err, &px->conf.args);
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]984 if (!cond) {
985 /* note that parse_acl_cond must have filled <err> here */
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]986 return NULL;
Willy Tarreaub7451bb2012-04-27 12:38:15 +0200[diff] [blame]987 }
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]988
989 cond->file = file;
990 cond->line = line;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]991 px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
Willy Tarreau2bbba412010-01-28 16:48:33 +0100[diff] [blame]992 return cond;
993}
994
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]995/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
996 * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]997 * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]998 * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
999 * function only computes the condition, it does not apply the polarity required
1000 * 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]1001 *
1002 * res = acl_pass(res);
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1003 * if (res == ACL_TEST_MISS)
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1004 * return 0;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1005 * if (cond->pol == ACL_COND_UNLESS)
1006 * res = !res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1007 */
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1008enum 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]1009{
1010 __label__ fetch_next;
1011 struct acl_term_suite *suite;
1012 struct acl_term *term;
1013 struct acl_expr *expr;
1014 struct acl *acl;
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1015 struct sample smp;
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1016 enum acl_test_res acl_res, suite_res, cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1017
Willy Tarreau7a777ed2012-04-26 11:44:02 +0200[diff] [blame]1018 /* ACLs are iterated over all values, so let's always set the flag to
1019 * indicate this to the fetch functions.
1020 */
1021 opt |= SMP_OPT_ITERATE;
1022
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1023 /* We're doing a logical OR between conditions so we initialize to FAIL.
1024 * The MISS status is propagated down from the suites.
1025 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1026 cond_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1027 list_for_each_entry(suite, &cond->suites, list) {
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1028 /* Evaluate condition suite <suite>. We stop at the first term
Willy Tarreau0cba6072013-11-28 22:21:02 +0100[diff] [blame]1029 * which returns ACL_TEST_FAIL. The MISS status is still propagated
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1030 * in case of uncertainty in the result.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1031 */
1032
1033 /* we're doing a logical AND between terms, so we must set the
1034 * initial value to PASS.
1035 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1036 suite_res = ACL_TEST_PASS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1037 list_for_each_entry(term, &suite->terms, list) {
1038 acl = term->acl;
1039
1040 /* FIXME: use cache !
1041 * check acl->cache_idx for this.
1042 */
1043
1044 /* ACL result not cached. Let's scan all the expressions
1045 * and use the first one to match.
1046 */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1047 acl_res = ACL_TEST_FAIL;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1048 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaud41f8d82007-06-10 10:06:18 +0200[diff] [blame]1049 /* we need to reset context and flags */
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1050 memset(&smp, 0, sizeof(smp));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1051 fetch_next:
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1052 if (!sample_process(px, l4, l7, opt, expr->smp, &smp)) {
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1053 /* maybe we could not fetch because of missing data */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1054 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1055 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1056 continue;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1057 }
Willy Tarreauc4262962010-05-10 23:42:40 +0200[diff] [blame]1058
Thierry FOURNIER1794fdf2014-01-17 15:25:13 +0100[diff] [blame]1059 acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, 0));
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1060 /*
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1061 * OK now acl_res holds the result of this expression
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1062 * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1063 *
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1064 * Then if (!MISS) we can cache the result, and put
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1065 * (smp.flags & SMP_F_VOLATILE) in the cache flags.
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1066 *
1067 * FIXME: implement cache.
1068 *
1069 */
1070
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1071 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1072 if (acl_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1073 break;
1074
Willy Tarreau37406352012-04-23 16:16:37 +0200[diff] [blame]1075 if (smp.flags & SMP_F_NOT_LAST)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1076 goto fetch_next;
Willy Tarreaub6866442008-07-14 23:54:42 +0200[diff] [blame]1077
1078 /* sometimes we know the fetched data is subject to change
1079 * later and give another chance for a new match (eg: request
1080 * size, time, ...)
1081 */
Willy Tarreau32a6f2e2012-04-25 10:13:36 +0200[diff] [blame]1082 if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1083 acl_res |= ACL_TEST_MISS;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1084 }
1085 /*
1086 * Here we have the result of an ACL (cached or not).
1087 * ACLs are combined, negated or not, to form conditions.
1088 */
1089
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1090 if (term->neg)
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1091 acl_res = acl_neg(acl_res);
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1092
1093 suite_res &= acl_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1094
Willy Tarreau79c412b2013-10-30 19:30:32 +0100[diff] [blame]1095 /* we're ANDing these terms, so a single FAIL or MISS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1096 if (suite_res != ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1097 break;
1098 }
1099 cond_res |= suite_res;
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1100
1101 /* we're ORing these terms, so a single PASS is enough */
Thierry FOURNIERa65b3432013-11-28 18:22:00 +0100[diff] [blame]1102 if (cond_res == ACL_TEST_PASS)
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1103 break;
1104 }
Willy Tarreau11382812008-07-09 16:18:21 +0200[diff] [blame]1105 return cond_res;
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1106}
1107
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1108/* Returns a pointer to the first ACL conflicting with usage at place <where>
1109 * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
1110 * no conflict is found. Only full conflicts are detected (ACL is not usable).
1111 * Use the next function to check for useless keywords.
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1112 */
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1113const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1114{
1115 struct acl_term_suite *suite;
1116 struct acl_term *term;
1117 struct acl *acl;
1118
1119 list_for_each_entry(suite, &cond->suites, list) {
1120 list_for_each_entry(term, &suite->terms, list) {
1121 acl = term->acl;
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1122 if (!(acl->val & where))
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1123 return acl;
1124 }
1125 }
1126 return NULL;
1127}
1128
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1129/* Returns a pointer to the first ACL and its first keyword to conflict with
1130 * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
1131 * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
1132 * null), or false if not conflict is found. The first useless keyword is
1133 * returned.
1134 */
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1135int 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]1136{
1137 struct acl_term_suite *suite;
1138 struct acl_term *term;
1139 struct acl_expr *expr;
1140
1141 list_for_each_entry(suite, &cond->suites, list) {
1142 list_for_each_entry(term, &suite->terms, list) {
1143 list_for_each_entry(expr, &term->acl->expr, list) {
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1144 if (!(expr->smp->fetch->val & where)) {
Willy Tarreaua91d0a52013-03-25 08:12:18 +0100[diff] [blame]1145 if (acl)
1146 *acl = term->acl;
1147 if (kw)
1148 *kw = expr->kw;
1149 return 1;
1150 }
1151 }
1152 }
1153 }
1154 return 0;
1155}
1156
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1157/*
1158 * Find targets for userlist and groups in acl. Function returns the number
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1159 * of errors or OK if everything is fine. It must be called only once sample
1160 * fetch arguments have been resolved (after smp_resolve_args()).
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1161 */
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1162int acl_find_targets(struct proxy *p)
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1163{
1164
1165 struct acl *acl;
1166 struct acl_expr *expr;
Thierry FOURNIER3ead5b92013-12-13 12:12:18 +0100[diff] [blame]1167 struct pattern_list *pattern;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1168 int cfgerr = 0;
1169
1170 list_for_each_entry(acl, &p->acl, list) {
1171 list_for_each_entry(expr, &acl->expr, list) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1172 if (!strcmp(expr->kw, "http_auth_group")) {
1173 /* Note: the ARGT_USR argument may only have been resolved earlier
1174 * by smp_resolve_args().
1175 */
Thierry FOURNIER348971e2013-11-21 10:50:10 +0100[diff] [blame]1176 if (expr->smp->arg_p->unresolved) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1177 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]1178 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]1179 cfgerr++;
Willy Tarreau496aa012012-06-01 10:38:29 +0200[diff] [blame]1180 continue;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1181 }
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1182
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1183 if (LIST_ISEMPTY(&expr->pat.patterns)) {
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1184 Alert("proxy %s: acl %s %s(): no groups specified.\n",
Willy Tarreau93fddf12013-03-31 22:59:32 +0200[diff] [blame]1185 p->id, acl->name, expr->kw);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1186 cfgerr++;
1187 continue;
1188 }
1189
Thierry FOURNIER9eec0a62014-01-22 18:38:02 +0100[diff] [blame]1190 /* For each pattern, check if the group exists. */
Thierry FOURNIERd163e1c2013-11-28 11:41:23 +0100[diff] [blame]1191 list_for_each_entry(pattern, &expr->pat.patterns, list) {
Thierry FOURNIER3ead5b92013-12-13 12:12:18 +0100[diff] [blame]1192 if (!check_group(expr->smp->arg_p->data.usr, pattern->pat.ptr.str)) {
Willy Tarreaua4312fa2013-04-02 16:34:32 +0200[diff] [blame]1193 Alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
Thierry FOURNIER3ead5b92013-12-13 12:12:18 +0100[diff] [blame]1194 p->id, acl->name, expr->kw, pattern->pat.ptr.str);
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1195 cfgerr++;
Krzysztof Piotr Oledzkif9423ae2010-01-29 19:26:18 +0100[diff] [blame]1196 }
1197 }
1198 }
1199 }
1200 }
1201
1202 return cfgerr;
1203}
Willy Tarreaudd64f8d2008-07-27 22:02:32 +0200[diff] [blame]1204
Willy Tarreau8ed669b2013-01-11 15:49:37 +0100[diff] [blame]1205/* initializes ACLs by resolving the sample fetch names they rely upon.
1206 * Returns 0 on success, otherwise an error.
1207 */
1208int init_acl()
1209{
1210 int err = 0;
1211 int index;
1212 const char *name;
1213 struct acl_kw_list *kwl;
1214 struct sample_fetch *smp;
1215
1216 list_for_each_entry(kwl, &acl_keywords.list, list) {
1217 for (index = 0; kwl->kw[index].kw != NULL; index++) {
1218 name = kwl->kw[index].fetch_kw;
1219 if (!name)
1220 name = kwl->kw[index].kw;
1221
1222 smp = find_sample_fetch(name, strlen(name));
1223 if (!smp) {
1224 Alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
1225 kwl->kw[index].kw, name);
1226 err++;
1227 continue;
1228 }
1229 kwl->kw[index].smp = smp;
1230 }
1231 }
1232 return err;
1233}
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1234
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1235/************************************************************************/
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1236/* All supported sample and ACL keywords must be declared here. */
1237/************************************************************************/
1238
1239/* Note: must not be declared <const> as its list will be overwritten.
Willy Tarreau61612d42012-04-19 18:42:05 +0200[diff] [blame]1240 * Please take care of keeping this list alphabetically sorted.
1241 */
Willy Tarreaudc13c112013-06-21 23:16:39 +0200[diff] [blame]1242static struct acl_kw_list acl_kws = {ILH, {
Willy Tarreaud4c33c82013-01-07 21:59:07 +0100[diff] [blame]1243 { /* END */ },
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1244}};
1245
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1246__attribute__((constructor))
1247static void __acl_init(void)
1248{
Willy Tarreaua84d3742007-05-07 00:36:48 +0200[diff] [blame]1249 acl_register_keywords(&acl_kws);
1250}
1251
1252
1253/*
1254 * Local variables:
1255 * c-indent-level: 8
1256 * c-basic-offset: 8
1257 * End:
1258 */