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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 09:35:11 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 09:35:11 +0000
commitda76459dc21b5af2449af2d36eb95226cb186ce2 (patch)
tree542ebb3c1e796fac2742495b8437331727bbbfa0 /src/acl.c
parentInitial commit. (diff)
downloadhaproxy-da76459dc21b5af2449af2d36eb95226cb186ce2.tar.xz
haproxy-da76459dc21b5af2449af2d36eb95226cb186ce2.zip
Adding upstream version 2.6.12.upstream/2.6.12upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/acl.c')
-rw-r--r--src/acl.c1378
1 files changed, 1378 insertions, 0 deletions
diff --git a/src/acl.c b/src/acl.c
new file mode 100644
index 0000000..15ca766
--- /dev/null
+++ b/src/acl.c
@@ -0,0 +1,1378 @@
+/*
+ * ACL management functions.
+ *
+ * Copyright 2000-2013 Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <import/ebsttree.h>
+
+#include <haproxy/acl.h>
+#include <haproxy/api.h>
+#include <haproxy/arg.h>
+#include <haproxy/auth.h>
+#include <haproxy/errors.h>
+#include <haproxy/global.h>
+#include <haproxy/list.h>
+#include <haproxy/pattern.h>
+#include <haproxy/proxy-t.h>
+#include <haproxy/sample.h>
+#include <haproxy/stick_table.h>
+#include <haproxy/tools.h>
+
+/* List head of all known ACL keywords */
+static struct acl_kw_list acl_keywords = {
+ .list = LIST_HEAD_INIT(acl_keywords.list)
+};
+
+/* input values are 0 or 3, output is the same */
+static inline enum acl_test_res pat2acl(struct pattern *pat)
+{
+ if (pat)
+ return ACL_TEST_PASS;
+ else
+ return ACL_TEST_FAIL;
+}
+
+/*
+ * Registers the ACL keyword list <kwl> as a list of valid keywords for next
+ * parsing sessions.
+ */
+void acl_register_keywords(struct acl_kw_list *kwl)
+{
+ LIST_APPEND(&acl_keywords.list, &kwl->list);
+}
+
+/*
+ * Unregisters the ACL keyword list <kwl> from the list of valid keywords.
+ */
+void acl_unregister_keywords(struct acl_kw_list *kwl)
+{
+ LIST_DELETE(&kwl->list);
+ LIST_INIT(&kwl->list);
+}
+
+/* Return a pointer to the ACL <name> within the list starting at <head>, or
+ * NULL if not found.
+ */
+struct acl *find_acl_by_name(const char *name, struct list *head)
+{
+ struct acl *acl;
+ list_for_each_entry(acl, head, list) {
+ if (strcmp(acl->name, name) == 0)
+ return acl;
+ }
+ return NULL;
+}
+
+/* Return a pointer to the ACL keyword <kw>, or NULL if not found. Note that if
+ * <kw> contains an opening parenthesis or a comma, only the left part of it is
+ * checked.
+ */
+struct acl_keyword *find_acl_kw(const char *kw)
+{
+ int index;
+ const char *kwend;
+ struct acl_kw_list *kwl;
+
+ kwend = kw;
+ while (is_idchar(*kwend))
+ kwend++;
+
+ list_for_each_entry(kwl, &acl_keywords.list, list) {
+ for (index = 0; kwl->kw[index].kw != NULL; index++) {
+ if ((strncmp(kwl->kw[index].kw, kw, kwend - kw) == 0) &&
+ kwl->kw[index].kw[kwend-kw] == 0)
+ return &kwl->kw[index];
+ }
+ }
+ return NULL;
+}
+
+static struct acl_expr *prune_acl_expr(struct acl_expr *expr)
+{
+ struct arg *arg;
+
+ pattern_prune(&expr->pat);
+
+ for (arg = expr->smp->arg_p; arg; arg++) {
+ if (arg->type == ARGT_STOP)
+ break;
+ if (arg->type == ARGT_STR || arg->unresolved) {
+ chunk_destroy(&arg->data.str);
+ arg->unresolved = 0;
+ }
+ }
+
+ release_sample_expr(expr->smp);
+
+ return expr;
+}
+
+/* Parse an ACL expression starting at <args>[0], and return it. If <err> is
+ * not NULL, it will be filled with a pointer to an error message in case of
+ * error. This pointer must be freeable or NULL. <al> is an arg_list serving
+ * as a list head to report missing dependencies. It may be NULL if such
+ * dependencies are not allowed.
+ *
+ * Right now, the only accepted syntax is :
+ * <subject> [<value>...]
+ */
+struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al,
+ const char *file, int line)
+{
+ __label__ out_return, out_free_expr;
+ struct acl_expr *expr;
+ struct acl_keyword *aclkw;
+ int refflags, patflags;
+ const char *arg;
+ struct sample_expr *smp = NULL;
+ int idx = 0;
+ char *ckw = NULL;
+ const char *begw;
+ const char *endw;
+ const char *endt;
+ int cur_type;
+ int nbargs;
+ int operator = STD_OP_EQ;
+ int op;
+ int contain_colon, have_dot;
+ const char *dot;
+ signed long long value, minor;
+ /* The following buffer contain two numbers, a ':' separator and the final \0. */
+ char buffer[NB_LLMAX_STR + 1 + NB_LLMAX_STR + 1];
+ int is_loaded;
+ int unique_id;
+ char *error;
+ struct pat_ref *ref;
+ struct pattern_expr *pattern_expr;
+ int load_as_map = 0;
+ int acl_conv_found = 0;
+
+ /* First, we look for an ACL keyword. And if we don't find one, then
+ * we look for a sample fetch expression starting with a sample fetch
+ * keyword.
+ */
+
+ if (al) {
+ al->ctx = ARGC_ACL; // to report errors while resolving args late
+ al->kw = *args;
+ al->conv = NULL;
+ }
+
+ aclkw = find_acl_kw(args[0]);
+ if (aclkw) {
+ /* OK we have a real ACL keyword */
+
+ /* build new sample expression for this ACL */
+ smp = calloc(1, sizeof(*smp));
+ if (!smp) {
+ memprintf(err, "out of memory when parsing ACL expression");
+ goto out_return;
+ }
+ LIST_INIT(&(smp->conv_exprs));
+ smp->fetch = aclkw->smp;
+ smp->arg_p = empty_arg_list;
+
+ /* look for the beginning of the subject arguments */
+ for (arg = args[0]; is_idchar(*arg); arg++)
+ ;
+
+ /* At this point, we have :
+ * - args[0] : beginning of the keyword
+ * - arg : end of the keyword, first character not part of keyword
+ */
+ nbargs = make_arg_list(arg, -1, smp->fetch->arg_mask, &smp->arg_p,
+ err, &endt, NULL, al);
+ if (nbargs < 0) {
+ /* note that make_arg_list will have set <err> here */
+ memprintf(err, "ACL keyword '%s' : %s", aclkw->kw, *err);
+ goto out_free_smp;
+ }
+
+ if (!smp->arg_p) {
+ smp->arg_p = empty_arg_list;
+ }
+ else if (smp->fetch->val_args && !smp->fetch->val_args(smp->arg_p, err)) {
+ /* invalid keyword argument, error must have been
+ * set by val_args().
+ */
+ memprintf(err, "in argument to '%s', %s", aclkw->kw, *err);
+ goto out_free_smp;
+ }
+ arg = endt;
+
+ /* look for the beginning of the converters list. Those directly attached
+ * to the ACL keyword are found just after <arg> which points to the comma.
+ * If we find any converter, then we don't use the ACL keyword's match
+ * anymore but the one related to the converter's output type.
+ */
+ cur_type = smp->fetch->out_type;
+ while (*arg) {
+ struct sample_conv *conv;
+ struct sample_conv_expr *conv_expr;
+ int err_arg;
+ int argcnt;
+
+ if (*arg && *arg != ',') {
+ if (ckw)
+ memprintf(err, "ACL keyword '%s' : missing comma after converter '%s'.",
+ aclkw->kw, ckw);
+ else
+ memprintf(err, "ACL keyword '%s' : missing comma after fetch keyword.",
+ aclkw->kw);
+ goto out_free_smp;
+ }
+
+ /* FIXME: how long should we support such idiocies ? Maybe we
+ * should already warn ?
+ */
+ while (*arg == ',') /* then trailing commas */
+ arg++;
+
+ begw = arg; /* start of converter keyword */
+
+ if (!*begw)
+ /* none ? end of converters */
+ break;
+
+ for (endw = begw; is_idchar(*endw); endw++)
+ ;
+
+ free(ckw);
+ ckw = my_strndup(begw, endw - begw);
+
+ conv = find_sample_conv(begw, endw - begw);
+ if (!conv) {
+ /* Unknown converter method */
+ memprintf(err, "ACL keyword '%s' : unknown converter '%s'.",
+ aclkw->kw, ckw);
+ goto out_free_smp;
+ }
+
+ arg = endw;
+
+ if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) {
+ memprintf(err, "ACL keyword '%s' : returns type of converter '%s' is unknown.",
+ aclkw->kw, ckw);
+ goto out_free_smp;
+ }
+
+ /* If impossible type conversion */
+ if (!sample_casts[cur_type][conv->in_type]) {
+ memprintf(err, "ACL keyword '%s' : converter '%s' cannot be applied.",
+ aclkw->kw, ckw);
+ goto out_free_smp;
+ }
+
+ cur_type = conv->out_type;
+ conv_expr = calloc(1, sizeof(*conv_expr));
+ if (!conv_expr)
+ goto out_free_smp;
+
+ LIST_APPEND(&(smp->conv_exprs), &(conv_expr->list));
+ conv_expr->conv = conv;
+ acl_conv_found = 1;
+
+ if (al) {
+ al->kw = smp->fetch->kw;
+ al->conv = conv_expr->conv->kw;
+ }
+ argcnt = make_arg_list(endw, -1, conv->arg_mask, &conv_expr->arg_p, err, &arg, &err_arg, al);
+ if (argcnt < 0) {
+ memprintf(err, "ACL keyword '%s' : invalid arg %d in converter '%s' : %s.",
+ aclkw->kw, err_arg+1, ckw, *err);
+ goto out_free_smp;
+ }
+
+ if (argcnt && !conv->arg_mask) {
+ memprintf(err, "converter '%s' does not support any args", ckw);
+ goto out_free_smp;
+ }
+
+ if (!conv_expr->arg_p)
+ conv_expr->arg_p = empty_arg_list;
+
+ if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, file, line, err)) {
+ memprintf(err, "ACL keyword '%s' : invalid args in converter '%s' : %s.",
+ aclkw->kw, ckw, *err);
+ goto out_free_smp;
+ }
+ }
+ ha_free(&ckw);
+ }
+ else {
+ /* This is not an ACL keyword, so we hope this is a sample fetch
+ * keyword that we're going to transparently use as an ACL. If
+ * so, we retrieve a completely parsed expression with args and
+ * convs already done.
+ */
+ smp = sample_parse_expr((char **)args, &idx, file, line, err, al, NULL);
+ if (!smp) {
+ memprintf(err, "%s in ACL expression '%s'", *err, *args);
+ goto out_return;
+ }
+ cur_type = smp_expr_output_type(smp);
+ }
+
+ expr = calloc(1, sizeof(*expr));
+ if (!expr) {
+ memprintf(err, "out of memory when parsing ACL expression");
+ goto out_free_smp;
+ }
+
+ pattern_init_head(&expr->pat);
+
+ expr->pat.expect_type = cur_type;
+ expr->smp = smp;
+ expr->kw = smp->fetch->kw;
+ smp = NULL; /* don't free it anymore */
+
+ if (aclkw && !acl_conv_found) {
+ expr->kw = aclkw->kw;
+ expr->pat.parse = aclkw->parse ? aclkw->parse : pat_parse_fcts[aclkw->match_type];
+ expr->pat.index = aclkw->index ? aclkw->index : pat_index_fcts[aclkw->match_type];
+ expr->pat.match = aclkw->match ? aclkw->match : pat_match_fcts[aclkw->match_type];
+ expr->pat.prune = aclkw->prune ? aclkw->prune : pat_prune_fcts[aclkw->match_type];
+ }
+
+ if (!expr->pat.parse) {
+ /* Parse/index/match functions depend on the expression type,
+ * so we have to map them now. Some types can be automatically
+ * converted.
+ */
+ switch (cur_type) {
+ case SMP_T_BOOL:
+ expr->pat.parse = pat_parse_fcts[PAT_MATCH_BOOL];
+ expr->pat.index = pat_index_fcts[PAT_MATCH_BOOL];
+ expr->pat.match = pat_match_fcts[PAT_MATCH_BOOL];
+ expr->pat.prune = pat_prune_fcts[PAT_MATCH_BOOL];
+ expr->pat.expect_type = pat_match_types[PAT_MATCH_BOOL];
+ break;
+ case SMP_T_SINT:
+ expr->pat.parse = pat_parse_fcts[PAT_MATCH_INT];
+ expr->pat.index = pat_index_fcts[PAT_MATCH_INT];
+ expr->pat.match = pat_match_fcts[PAT_MATCH_INT];
+ expr->pat.prune = pat_prune_fcts[PAT_MATCH_INT];
+ expr->pat.expect_type = pat_match_types[PAT_MATCH_INT];
+ break;
+ case SMP_T_ADDR:
+ case SMP_T_IPV4:
+ case SMP_T_IPV6:
+ expr->pat.parse = pat_parse_fcts[PAT_MATCH_IP];
+ expr->pat.index = pat_index_fcts[PAT_MATCH_IP];
+ expr->pat.match = pat_match_fcts[PAT_MATCH_IP];
+ expr->pat.prune = pat_prune_fcts[PAT_MATCH_IP];
+ expr->pat.expect_type = pat_match_types[PAT_MATCH_IP];
+ break;
+ case SMP_T_STR:
+ expr->pat.parse = pat_parse_fcts[PAT_MATCH_STR];
+ expr->pat.index = pat_index_fcts[PAT_MATCH_STR];
+ expr->pat.match = pat_match_fcts[PAT_MATCH_STR];
+ expr->pat.prune = pat_prune_fcts[PAT_MATCH_STR];
+ expr->pat.expect_type = pat_match_types[PAT_MATCH_STR];
+ break;
+ }
+ }
+
+ /* Additional check to protect against common mistakes */
+ if (expr->pat.parse && cur_type != SMP_T_BOOL && !*args[1]) {
+ ha_warning("parsing acl keyword '%s' :\n"
+ " no pattern to match against were provided, so this ACL will never match.\n"
+ " If this is what you intended, please add '--' to get rid of this warning.\n"
+ " If you intended to match only for existence, please use '-m found'.\n"
+ " If you wanted to force an int to match as a bool, please use '-m bool'.\n"
+ "\n",
+ args[0]);
+ }
+
+ args++;
+
+ /* check for options before patterns. Supported options are :
+ * -i : ignore case for all patterns by default
+ * -f : read patterns from those files
+ * -m : force matching method (must be used before -f)
+ * -M : load the file as map file
+ * -u : force the unique id of the acl
+ * -- : everything after this is not an option
+ */
+ refflags = PAT_REF_ACL;
+ patflags = 0;
+ is_loaded = 0;
+ unique_id = -1;
+ while (**args == '-') {
+ if (strcmp(*args, "-i") == 0)
+ patflags |= PAT_MF_IGNORE_CASE;
+ else if (strcmp(*args, "-n") == 0)
+ patflags |= PAT_MF_NO_DNS;
+ else if (strcmp(*args, "-u") == 0) {
+ unique_id = strtol(args[1], &error, 10);
+ if (*error != '\0') {
+ memprintf(err, "the argument of -u must be an integer");
+ goto out_free_expr;
+ }
+
+ /* Check if this id is really unique. */
+ if (pat_ref_lookupid(unique_id)) {
+ memprintf(err, "the id is already used");
+ goto out_free_expr;
+ }
+
+ args++;
+ }
+ else if (strcmp(*args, "-f") == 0) {
+ if (!expr->pat.parse) {
+ memprintf(err, "matching method must be specified first (using '-m') when using a sample fetch of this type ('%s')", expr->kw);
+ goto out_free_expr;
+ }
+
+ if (!pattern_read_from_file(&expr->pat, refflags, args[1], patflags, load_as_map, err, file, line))
+ goto out_free_expr;
+ is_loaded = 1;
+ args++;
+ }
+ else if (strcmp(*args, "-m") == 0) {
+ int idx;
+
+ if (is_loaded) {
+ memprintf(err, "'-m' must only be specified before patterns and files in parsing ACL expression");
+ goto out_free_expr;
+ }
+
+ idx = pat_find_match_name(args[1]);
+ if (idx < 0) {
+ memprintf(err, "unknown matching method '%s' when parsing ACL expression", args[1]);
+ goto out_free_expr;
+ }
+
+ /* Note: -m found is always valid, bool/int are compatible, str/bin/reg/len are compatible */
+ if (idx != PAT_MATCH_FOUND && !sample_casts[cur_type][pat_match_types[idx]]) {
+ memprintf(err, "matching method '%s' cannot be used with fetch keyword '%s'", args[1], expr->kw);
+ goto out_free_expr;
+ }
+ expr->pat.parse = pat_parse_fcts[idx];
+ expr->pat.index = pat_index_fcts[idx];
+ expr->pat.match = pat_match_fcts[idx];
+ expr->pat.prune = pat_prune_fcts[idx];
+ expr->pat.expect_type = pat_match_types[idx];
+ args++;
+ }
+ else if (strcmp(*args, "-M") == 0) {
+ refflags |= PAT_REF_MAP;
+ load_as_map = 1;
+ }
+ else if (strcmp(*args, "--") == 0) {
+ args++;
+ break;
+ }
+ else {
+ memprintf(err, "'%s' is not a valid ACL option. Please use '--' before any pattern beginning with a '-'", args[0]);
+ goto out_free_expr;
+ break;
+ }
+ args++;
+ }
+
+ if (!expr->pat.parse) {
+ memprintf(err, "matching method must be specified first (using '-m') when using a sample fetch of this type ('%s')", expr->kw);
+ goto out_free_expr;
+ }
+
+ /* Create displayed reference */
+ snprintf(trash.area, trash.size, "acl '%s' file '%s' line %d",
+ expr->kw, file, line);
+ trash.area[trash.size - 1] = '\0';
+
+ /* Create new pattern reference. */
+ ref = pat_ref_newid(unique_id, trash.area, PAT_REF_ACL);
+ if (!ref) {
+ memprintf(err, "memory error");
+ goto out_free_expr;
+ }
+
+ /* Create new pattern expression associated to this reference. */
+ pattern_expr = pattern_new_expr(&expr->pat, ref, patflags, err, NULL);
+ if (!pattern_expr)
+ goto out_free_expr;
+
+ /* now parse all patterns */
+ while (**args) {
+ arg = *args;
+
+ /* Compatibility layer. Each pattern can parse only one string per pattern,
+ * but the pat_parser_int() and pat_parse_dotted_ver() parsers were need
+ * optionally two operators. The first operator is the match method: eq,
+ * le, lt, ge and gt. pat_parse_int() and pat_parse_dotted_ver() functions
+ * can have a compatibility syntax based on ranges:
+ *
+ * pat_parse_int():
+ *
+ * "eq x" -> "x" or "x:x"
+ * "le x" -> ":x"
+ * "lt x" -> ":y" (with y = x - 1)
+ * "ge x" -> "x:"
+ * "gt x" -> "y:" (with y = x + 1)
+ *
+ * pat_parse_dotted_ver():
+ *
+ * "eq x.y" -> "x.y" or "x.y:x.y"
+ * "le x.y" -> ":x.y"
+ * "lt x.y" -> ":w.z" (with w.z = x.y - 1)
+ * "ge x.y" -> "x.y:"
+ * "gt x.y" -> "w.z:" (with w.z = x.y + 1)
+ *
+ * If y is not present, assume that is "0".
+ *
+ * The syntax eq, le, lt, ge and gt are proper to the acl syntax. The
+ * following block of code detect the operator, and rewrite each value
+ * in parsable string.
+ */
+ if (expr->pat.parse == pat_parse_int ||
+ expr->pat.parse == pat_parse_dotted_ver) {
+ /* Check for operator. If the argument is operator, memorise it and
+ * continue to the next argument.
+ */
+ op = get_std_op(arg);
+ if (op != -1) {
+ operator = op;
+ args++;
+ continue;
+ }
+
+ /* Check if the pattern contain ':' or '-' character. */
+ contain_colon = (strchr(arg, ':') || strchr(arg, '-'));
+
+ /* If the pattern contain ':' or '-' character, give it to the parser as is.
+ * If no contain ':' and operator is STD_OP_EQ, give it to the parser as is.
+ * In other case, try to convert the value according with the operator.
+ */
+ if (!contain_colon && operator != STD_OP_EQ) {
+ /* Search '.' separator. */
+ dot = strchr(arg, '.');
+ if (!dot) {
+ have_dot = 0;
+ minor = 0;
+ dot = arg + strlen(arg);
+ }
+ else
+ have_dot = 1;
+
+ /* convert the integer minor part for the pat_parse_dotted_ver() function. */
+ if (expr->pat.parse == pat_parse_dotted_ver && have_dot) {
+ if (strl2llrc(dot+1, strlen(dot+1), &minor) != 0) {
+ memprintf(err, "'%s' is neither a number nor a supported operator", arg);
+ goto out_free_expr;
+ }
+ if (minor >= 65536) {
+ memprintf(err, "'%s' contains too large a minor value", arg);
+ goto out_free_expr;
+ }
+ }
+
+ /* convert the integer value for the pat_parse_int() function, and the
+ * integer major part for the pat_parse_dotted_ver() function.
+ */
+ if (strl2llrc(arg, dot - arg, &value) != 0) {
+ memprintf(err, "'%s' is neither a number nor a supported operator", arg);
+ goto out_free_expr;
+ }
+ if (expr->pat.parse == pat_parse_dotted_ver) {
+ if (value >= 65536) {
+ memprintf(err, "'%s' contains too large a major value", arg);
+ goto out_free_expr;
+ }
+ value = (value << 16) | (minor & 0xffff);
+ }
+
+ switch (operator) {
+
+ case STD_OP_EQ: /* this case is not possible. */
+ memprintf(err, "internal error");
+ goto out_free_expr;
+
+ case STD_OP_GT:
+ value++; /* gt = ge + 1 */
+ /* fall through */
+
+ case STD_OP_GE:
+ if (expr->pat.parse == pat_parse_int)
+ snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld:", value);
+ else
+ snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, "%lld.%lld:",
+ value >> 16, value & 0xffff);
+ arg = buffer;
+ break;
+
+ case STD_OP_LT:
+ value--; /* lt = le - 1 */
+ /* fall through */
+
+ case STD_OP_LE:
+ if (expr->pat.parse == pat_parse_int)
+ snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld", value);
+ else
+ snprintf(buffer, NB_LLMAX_STR+NB_LLMAX_STR+2, ":%lld.%lld",
+ value >> 16, value & 0xffff);
+ arg = buffer;
+ break;
+ }
+ }
+ }
+
+ /* Add sample to the reference, and try to compile it fior each pattern
+ * using this value.
+ */
+ if (!pat_ref_add(ref, arg, NULL, err))
+ goto out_free_expr;
+ args++;
+ }
+
+ return expr;
+
+ out_free_expr:
+ prune_acl_expr(expr);
+ free(expr);
+ out_free_smp:
+ free(ckw);
+ free(smp);
+ out_return:
+ return NULL;
+}
+
+/* Purge everything in the acl <acl>, then return <acl>. */
+struct acl *prune_acl(struct acl *acl) {
+
+ struct acl_expr *expr, *exprb;
+
+ free(acl->name);
+
+ list_for_each_entry_safe(expr, exprb, &acl->expr, list) {
+ LIST_DELETE(&expr->list);
+ prune_acl_expr(expr);
+ free(expr);
+ }
+
+ return acl;
+}
+
+/* Parse an ACL with the name starting at <args>[0], and with a list of already
+ * known ACLs in <acl>. If the ACL was not in the list, it will be added.
+ * A pointer to that ACL is returned. If the ACL has an empty name, then it's
+ * an anonymous one and it won't be merged with any other one. If <err> is not
+ * NULL, it will be filled with an appropriate error. This pointer must be
+ * freeable or NULL. <al> is the arg_list serving as a head for unresolved
+ * dependencies. It may be NULL if such dependencies are not allowed.
+ *
+ * args syntax: <aclname> <acl_expr>
+ */
+struct acl *parse_acl(const char **args, struct list *known_acl, char **err, struct arg_list *al,
+ const char *file, int line)
+{
+ __label__ out_return, out_free_acl_expr, out_free_name;
+ struct acl *cur_acl;
+ struct acl_expr *acl_expr;
+ char *name;
+ const char *pos;
+
+ if (**args && (pos = invalid_char(*args))) {
+ memprintf(err, "invalid character in ACL name : '%c'", *pos);
+ goto out_return;
+ }
+
+ acl_expr = parse_acl_expr(args + 1, err, al, file, line);
+ if (!acl_expr) {
+ /* parse_acl_expr will have filled <err> here */
+ goto out_return;
+ }
+
+ /* Check for args beginning with an opening parenthesis just after the
+ * subject, as this is almost certainly a typo. Right now we can only
+ * emit a warning, so let's do so.
+ */
+ if (!strchr(args[1], '(') && *args[2] == '(')
+ ha_warning("parsing acl '%s' :\n"
+ " matching '%s' for pattern '%s' is likely a mistake and probably\n"
+ " not what you want. Maybe you need to remove the extraneous space before '('.\n"
+ " If you are really sure this is not an error, please insert '--' between the\n"
+ " match and the pattern to make this warning message disappear.\n",
+ args[0], args[1], args[2]);
+
+ if (*args[0])
+ cur_acl = find_acl_by_name(args[0], known_acl);
+ else
+ cur_acl = NULL;
+
+ if (!cur_acl) {
+ name = strdup(args[0]);
+ if (!name) {
+ memprintf(err, "out of memory when parsing ACL");
+ goto out_free_acl_expr;
+ }
+ cur_acl = calloc(1, sizeof(*cur_acl));
+ if (cur_acl == NULL) {
+ memprintf(err, "out of memory when parsing ACL");
+ goto out_free_name;
+ }
+
+ LIST_INIT(&cur_acl->expr);
+ LIST_APPEND(known_acl, &cur_acl->list);
+ cur_acl->name = name;
+ }
+
+ /* We want to know what features the ACL needs (typically HTTP parsing),
+ * and where it may be used. If an ACL relies on multiple matches, it is
+ * OK if at least one of them may match in the context where it is used.
+ */
+ cur_acl->use |= acl_expr->smp->fetch->use;
+ cur_acl->val |= acl_expr->smp->fetch->val;
+ LIST_APPEND(&cur_acl->expr, &acl_expr->list);
+ return cur_acl;
+
+ out_free_name:
+ free(name);
+ out_free_acl_expr:
+ prune_acl_expr(acl_expr);
+ free(acl_expr);
+ out_return:
+ return NULL;
+}
+
+/* Some useful ACLs provided by default. Only those used are allocated. */
+
+const struct {
+ const char *name;
+ const char *expr[4]; /* put enough for longest expression */
+} default_acl_list[] = {
+ { .name = "TRUE", .expr = {"always_true",""}},
+ { .name = "FALSE", .expr = {"always_false",""}},
+ { .name = "LOCALHOST", .expr = {"src","127.0.0.1/8","::1",""}},
+ { .name = "HTTP", .expr = {"req.proto_http",""}},
+ { .name = "HTTP_1.0", .expr = {"req.ver","1.0",""}},
+ { .name = "HTTP_1.1", .expr = {"req.ver","1.1",""}},
+ { .name = "HTTP_2.0", .expr = {"req.ver","2.0",""}},
+ { .name = "METH_CONNECT", .expr = {"method","CONNECT",""}},
+ { .name = "METH_DELETE", .expr = {"method","DELETE",""}},
+ { .name = "METH_GET", .expr = {"method","GET","HEAD",""}},
+ { .name = "METH_HEAD", .expr = {"method","HEAD",""}},
+ { .name = "METH_OPTIONS", .expr = {"method","OPTIONS",""}},
+ { .name = "METH_POST", .expr = {"method","POST",""}},
+ { .name = "METH_PUT", .expr = {"method","PUT",""}},
+ { .name = "METH_TRACE", .expr = {"method","TRACE",""}},
+ { .name = "HTTP_URL_ABS", .expr = {"url_reg","^[^/:]*://",""}},
+ { .name = "HTTP_URL_SLASH", .expr = {"url_beg","/",""}},
+ { .name = "HTTP_URL_STAR", .expr = {"url","*",""}},
+ { .name = "HTTP_CONTENT", .expr = {"req.hdr_val(content-length)","gt","0",""}},
+ { .name = "RDP_COOKIE", .expr = {"req.rdp_cookie_cnt","gt","0",""}},
+ { .name = "REQ_CONTENT", .expr = {"req.len","gt","0",""}},
+ { .name = "WAIT_END", .expr = {"wait_end",""}},
+ { .name = NULL, .expr = {""}}
+};
+
+/* Find a default ACL from the default_acl list, compile it and return it.
+ * If the ACL is not found, NULL is returned. In theory, it cannot fail,
+ * except when default ACLs are broken, in which case it will return NULL.
+ * If <known_acl> is not NULL, the ACL will be queued at its tail. If <err> is
+ * not NULL, it will be filled with an error message if an error occurs. This
+ * pointer must be freeable or NULL. <al> is an arg_list serving as a list head
+ * to report missing dependencies. It may be NULL if such dependencies are not
+ * allowed.
+ */
+static struct acl *find_acl_default(const char *acl_name, struct list *known_acl,
+ char **err, struct arg_list *al,
+ const char *file, int line)
+{
+ __label__ out_return, out_free_acl_expr, out_free_name;
+ struct acl *cur_acl;
+ struct acl_expr *acl_expr;
+ char *name;
+ int index;
+
+ for (index = 0; default_acl_list[index].name != NULL; index++) {
+ if (strcmp(acl_name, default_acl_list[index].name) == 0)
+ break;
+ }
+
+ if (default_acl_list[index].name == NULL) {
+ memprintf(err, "no such ACL : '%s'", acl_name);
+ return NULL;
+ }
+
+ acl_expr = parse_acl_expr((const char **)default_acl_list[index].expr, err, al, file, line);
+ if (!acl_expr) {
+ /* parse_acl_expr must have filled err here */
+ goto out_return;
+ }
+
+ name = strdup(acl_name);
+ if (!name) {
+ memprintf(err, "out of memory when building default ACL '%s'", acl_name);
+ goto out_free_acl_expr;
+ }
+
+ cur_acl = calloc(1, sizeof(*cur_acl));
+ if (cur_acl == NULL) {
+ memprintf(err, "out of memory when building default ACL '%s'", acl_name);
+ goto out_free_name;
+ }
+
+ cur_acl->name = name;
+ cur_acl->use |= acl_expr->smp->fetch->use;
+ cur_acl->val |= acl_expr->smp->fetch->val;
+ LIST_INIT(&cur_acl->expr);
+ LIST_APPEND(&cur_acl->expr, &acl_expr->list);
+ if (known_acl)
+ LIST_APPEND(known_acl, &cur_acl->list);
+
+ return cur_acl;
+
+ out_free_name:
+ free(name);
+ out_free_acl_expr:
+ prune_acl_expr(acl_expr);
+ free(acl_expr);
+ out_return:
+ return NULL;
+}
+
+/* Purge everything in the acl_cond <cond>, then return <cond>. */
+struct acl_cond *prune_acl_cond(struct acl_cond *cond)
+{
+ struct acl_term_suite *suite, *tmp_suite;
+ struct acl_term *term, *tmp_term;
+
+ /* iterate through all term suites and free all terms and all suites */
+ list_for_each_entry_safe(suite, tmp_suite, &cond->suites, list) {
+ list_for_each_entry_safe(term, tmp_term, &suite->terms, list)
+ free(term);
+ free(suite);
+ }
+ return cond;
+}
+
+/* Parse an ACL condition starting at <args>[0], relying on a list of already
+ * known ACLs passed in <known_acl>. The new condition is returned (or NULL in
+ * case of low memory). Supports multiple conditions separated by "or". If
+ * <err> is not NULL, it will be filled with a pointer to an error message in
+ * case of error, that the caller is responsible for freeing. The initial
+ * location must either be freeable or NULL. The list <al> serves as a list head
+ * for unresolved dependencies. It may be NULL if such dependencies are not
+ * allowed.
+ */
+struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl,
+ enum acl_cond_pol pol, char **err, struct arg_list *al,
+ const char *file, int line)
+{
+ __label__ out_return, out_free_suite, out_free_term;
+ int arg, neg;
+ const char *word;
+ struct acl *cur_acl;
+ struct acl_term *cur_term;
+ struct acl_term_suite *cur_suite;
+ struct acl_cond *cond;
+ unsigned int suite_val;
+
+ cond = calloc(1, sizeof(*cond));
+ if (cond == NULL) {
+ memprintf(err, "out of memory when parsing condition");
+ goto out_return;
+ }
+
+ LIST_INIT(&cond->list);
+ LIST_INIT(&cond->suites);
+ cond->pol = pol;
+ cond->val = 0;
+
+ cur_suite = NULL;
+ suite_val = ~0U;
+ neg = 0;
+ for (arg = 0; *args[arg]; arg++) {
+ word = args[arg];
+
+ /* remove as many exclamation marks as we can */
+ while (*word == '!') {
+ neg = !neg;
+ word++;
+ }
+
+ /* an empty word is allowed because we cannot force the user to
+ * always think about not leaving exclamation marks alone.
+ */
+ if (!*word)
+ continue;
+
+ if (strcasecmp(word, "or") == 0 || strcmp(word, "||") == 0) {
+ /* new term suite */
+ cond->val |= suite_val;
+ suite_val = ~0U;
+ cur_suite = NULL;
+ neg = 0;
+ continue;
+ }
+
+ if (strcmp(word, "{") == 0) {
+ /* we may have a complete ACL expression between two braces,
+ * find the last one.
+ */
+ int arg_end = arg + 1;
+ const char **args_new;
+
+ while (*args[arg_end] && strcmp(args[arg_end], "}") != 0)
+ arg_end++;
+
+ if (!*args[arg_end]) {
+ memprintf(err, "missing closing '}' in condition");
+ goto out_free_suite;
+ }
+
+ args_new = calloc(1, (arg_end - arg + 1) * sizeof(*args_new));
+ if (!args_new) {
+ memprintf(err, "out of memory when parsing condition");
+ goto out_free_suite;
+ }
+
+ args_new[0] = "";
+ memcpy(args_new + 1, args + arg + 1, (arg_end - arg) * sizeof(*args_new));
+ args_new[arg_end - arg] = "";
+ cur_acl = parse_acl(args_new, known_acl, err, al, file, line);
+ free(args_new);
+
+ if (!cur_acl) {
+ /* note that parse_acl() must have filled <err> here */
+ goto out_free_suite;
+ }
+ arg = arg_end;
+ }
+ else {
+ /* search for <word> in the known ACL names. If we do not find
+ * it, let's look for it in the default ACLs, and if found, add
+ * it to the list of ACLs of this proxy. This makes it possible
+ * to override them.
+ */
+ cur_acl = find_acl_by_name(word, known_acl);
+ if (cur_acl == NULL) {
+ cur_acl = find_acl_default(word, known_acl, err, al, file, line);
+ if (cur_acl == NULL) {
+ /* note that find_acl_default() must have filled <err> here */
+ goto out_free_suite;
+ }
+ }
+ }
+
+ cur_term = calloc(1, sizeof(*cur_term));
+ if (cur_term == NULL) {
+ memprintf(err, "out of memory when parsing condition");
+ goto out_free_suite;
+ }
+
+ cur_term->acl = cur_acl;
+ cur_term->neg = neg;
+
+ /* Here it is a bit complex. The acl_term_suite is a conjunction
+ * of many terms. It may only be used if all of its terms are
+ * usable at the same time. So the suite's validity domain is an
+ * AND between all ACL keywords' ones. But, the global condition
+ * is valid if at least one term suite is OK. So it's an OR between
+ * all of their validity domains. We could emit a warning as soon
+ * as suite_val is null because it means that the last ACL is not
+ * compatible with the previous ones. Let's remain simple for now.
+ */
+ cond->use |= cur_acl->use;
+ suite_val &= cur_acl->val;
+
+ if (!cur_suite) {
+ cur_suite = calloc(1, sizeof(*cur_suite));
+ if (cur_suite == NULL) {
+ memprintf(err, "out of memory when parsing condition");
+ goto out_free_term;
+ }
+ LIST_INIT(&cur_suite->terms);
+ LIST_APPEND(&cond->suites, &cur_suite->list);
+ }
+ LIST_APPEND(&cur_suite->terms, &cur_term->list);
+ neg = 0;
+ }
+
+ cond->val |= suite_val;
+ return cond;
+
+ out_free_term:
+ free(cur_term);
+ out_free_suite:
+ prune_acl_cond(cond);
+ free(cond);
+ out_return:
+ return NULL;
+}
+
+/* Builds an ACL condition starting at the if/unless keyword. The complete
+ * condition is returned. NULL is returned in case of error or if the first
+ * word is neither "if" nor "unless". It automatically sets the file name and
+ * the line number in the condition for better error reporting, and sets the
+ * HTTP intiailization requirements in the proxy. If <err> is not NULL, it will
+ * be filled with a pointer to an error message in case of error, that the
+ * caller is responsible for freeing. The initial location must either be
+ * freeable or NULL.
+ */
+struct acl_cond *build_acl_cond(const char *file, int line, struct list *known_acl,
+ struct proxy *px, const char **args, char **err)
+{
+ enum acl_cond_pol pol = ACL_COND_NONE;
+ struct acl_cond *cond = NULL;
+
+ if (err)
+ *err = NULL;
+
+ if (strcmp(*args, "if") == 0) {
+ pol = ACL_COND_IF;
+ args++;
+ }
+ else if (strcmp(*args, "unless") == 0) {
+ pol = ACL_COND_UNLESS;
+ args++;
+ }
+ else {
+ memprintf(err, "conditions must start with either 'if' or 'unless'");
+ return NULL;
+ }
+
+ cond = parse_acl_cond(args, known_acl, pol, err, &px->conf.args, file, line);
+ if (!cond) {
+ /* note that parse_acl_cond must have filled <err> here */
+ return NULL;
+ }
+
+ cond->file = file;
+ cond->line = line;
+ px->http_needed |= !!(cond->use & SMP_USE_HTTP_ANY);
+ return cond;
+}
+
+/* Execute condition <cond> and return either ACL_TEST_FAIL, ACL_TEST_MISS or
+ * ACL_TEST_PASS depending on the test results. ACL_TEST_MISS may only be
+ * returned if <opt> does not contain SMP_OPT_FINAL, indicating that incomplete
+ * data is being examined. The function automatically sets SMP_OPT_ITERATE. This
+ * function only computes the condition, it does not apply the polarity required
+ * by IF/UNLESS, it's up to the caller to do this using something like this :
+ *
+ * res = acl_pass(res);
+ * if (res == ACL_TEST_MISS)
+ * return 0;
+ * if (cond->pol == ACL_COND_UNLESS)
+ * res = !res;
+ */
+enum acl_test_res acl_exec_cond(struct acl_cond *cond, struct proxy *px, struct session *sess, struct stream *strm, unsigned int opt)
+{
+ __label__ fetch_next;
+ struct acl_term_suite *suite;
+ struct acl_term *term;
+ struct acl_expr *expr;
+ struct acl *acl;
+ struct sample smp;
+ enum acl_test_res acl_res, suite_res, cond_res;
+
+ /* ACLs are iterated over all values, so let's always set the flag to
+ * indicate this to the fetch functions.
+ */
+ opt |= SMP_OPT_ITERATE;
+
+ /* We're doing a logical OR between conditions so we initialize to FAIL.
+ * The MISS status is propagated down from the suites.
+ */
+ cond_res = ACL_TEST_FAIL;
+ list_for_each_entry(suite, &cond->suites, list) {
+ /* Evaluate condition suite <suite>. We stop at the first term
+ * which returns ACL_TEST_FAIL. The MISS status is still propagated
+ * in case of uncertainty in the result.
+ */
+
+ /* we're doing a logical AND between terms, so we must set the
+ * initial value to PASS.
+ */
+ suite_res = ACL_TEST_PASS;
+ list_for_each_entry(term, &suite->terms, list) {
+ acl = term->acl;
+
+ /* FIXME: use cache !
+ * check acl->cache_idx for this.
+ */
+
+ /* ACL result not cached. Let's scan all the expressions
+ * and use the first one to match.
+ */
+ acl_res = ACL_TEST_FAIL;
+ list_for_each_entry(expr, &acl->expr, list) {
+ /* we need to reset context and flags */
+ memset(&smp, 0, sizeof(smp));
+ fetch_next:
+ if (!sample_process(px, sess, strm, opt, expr->smp, &smp)) {
+ /* maybe we could not fetch because of missing data */
+ if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
+ acl_res |= ACL_TEST_MISS;
+ continue;
+ }
+
+ acl_res |= pat2acl(pattern_exec_match(&expr->pat, &smp, 0));
+ /*
+ * OK now acl_res holds the result of this expression
+ * as one of ACL_TEST_FAIL, ACL_TEST_MISS or ACL_TEST_PASS.
+ *
+ * Then if (!MISS) we can cache the result, and put
+ * (smp.flags & SMP_F_VOLATILE) in the cache flags.
+ *
+ * FIXME: implement cache.
+ *
+ */
+
+ /* we're ORing these terms, so a single PASS is enough */
+ if (acl_res == ACL_TEST_PASS)
+ break;
+
+ if (smp.flags & SMP_F_NOT_LAST)
+ goto fetch_next;
+
+ /* sometimes we know the fetched data is subject to change
+ * later and give another chance for a new match (eg: request
+ * size, time, ...)
+ */
+ if (smp.flags & SMP_F_MAY_CHANGE && !(opt & SMP_OPT_FINAL))
+ acl_res |= ACL_TEST_MISS;
+ }
+ /*
+ * Here we have the result of an ACL (cached or not).
+ * ACLs are combined, negated or not, to form conditions.
+ */
+
+ if (term->neg)
+ acl_res = acl_neg(acl_res);
+
+ suite_res &= acl_res;
+
+ /* we're ANDing these terms, so a single FAIL or MISS is enough */
+ if (suite_res != ACL_TEST_PASS)
+ break;
+ }
+ cond_res |= suite_res;
+
+ /* we're ORing these terms, so a single PASS is enough */
+ if (cond_res == ACL_TEST_PASS)
+ break;
+ }
+ return cond_res;
+}
+
+/* Returns a pointer to the first ACL conflicting with usage at place <where>
+ * which is one of the SMP_VAL_* bits indicating a check place, or NULL if
+ * no conflict is found. Only full conflicts are detected (ACL is not usable).
+ * Use the next function to check for useless keywords.
+ */
+const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where)
+{
+ struct acl_term_suite *suite;
+ struct acl_term *term;
+ struct acl *acl;
+
+ list_for_each_entry(suite, &cond->suites, list) {
+ list_for_each_entry(term, &suite->terms, list) {
+ acl = term->acl;
+ if (!(acl->val & where))
+ return acl;
+ }
+ }
+ return NULL;
+}
+
+/* Returns a pointer to the first ACL and its first keyword to conflict with
+ * usage at place <where> which is one of the SMP_VAL_* bits indicating a check
+ * place. Returns true if a conflict is found, with <acl> and <kw> set (if non
+ * null), or false if not conflict is found. The first useless keyword is
+ * returned.
+ */
+int acl_cond_kw_conflicts(const struct acl_cond *cond, unsigned int where, struct acl const **acl, char const **kw)
+{
+ struct acl_term_suite *suite;
+ struct acl_term *term;
+ struct acl_expr *expr;
+
+ list_for_each_entry(suite, &cond->suites, list) {
+ list_for_each_entry(term, &suite->terms, list) {
+ list_for_each_entry(expr, &term->acl->expr, list) {
+ if (!(expr->smp->fetch->val & where)) {
+ if (acl)
+ *acl = term->acl;
+ if (kw)
+ *kw = expr->kw;
+ return 1;
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+/*
+ * Find targets for userlist and groups in acl. Function returns the number
+ * of errors or OK if everything is fine. It must be called only once sample
+ * fetch arguments have been resolved (after smp_resolve_args()).
+ */
+int acl_find_targets(struct proxy *p)
+{
+
+ struct acl *acl;
+ struct acl_expr *expr;
+ struct pattern_list *pattern;
+ int cfgerr = 0;
+ struct pattern_expr_list *pexp;
+
+ list_for_each_entry(acl, &p->acl, list) {
+ list_for_each_entry(expr, &acl->expr, list) {
+ if (strcmp(expr->kw, "http_auth_group") == 0) {
+ /* Note: the ARGT_USR argument may only have been resolved earlier
+ * by smp_resolve_args().
+ */
+ if (expr->smp->arg_p->unresolved) {
+ ha_alert("Internal bug in proxy %s: %sacl %s %s() makes use of unresolved userlist '%s'. Please report this.\n",
+ p->id, *acl->name ? "" : "anonymous ", acl->name, expr->kw,
+ expr->smp->arg_p->data.str.area);
+ cfgerr++;
+ continue;
+ }
+
+ if (LIST_ISEMPTY(&expr->pat.head)) {
+ ha_alert("proxy %s: acl %s %s(): no groups specified.\n",
+ p->id, acl->name, expr->kw);
+ cfgerr++;
+ continue;
+ }
+
+ /* For each pattern, check if the group exists. */
+ list_for_each_entry(pexp, &expr->pat.head, list) {
+ if (LIST_ISEMPTY(&pexp->expr->patterns)) {
+ ha_alert("proxy %s: acl %s %s(): no groups specified.\n",
+ p->id, acl->name, expr->kw);
+ cfgerr++;
+ continue;
+ }
+
+ list_for_each_entry(pattern, &pexp->expr->patterns, list) {
+ /* this keyword only has one argument */
+ if (!check_group(expr->smp->arg_p->data.usr, pattern->pat.ptr.str)) {
+ ha_alert("proxy %s: acl %s %s(): invalid group '%s'.\n",
+ p->id, acl->name, expr->kw, pattern->pat.ptr.str);
+ cfgerr++;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ return cfgerr;
+}
+
+/* initializes ACLs by resolving the sample fetch names they rely upon.
+ * Returns 0 on success, otherwise an error.
+ */
+int init_acl()
+{
+ int err = 0;
+ int index;
+ const char *name;
+ struct acl_kw_list *kwl;
+ struct sample_fetch *smp;
+
+ list_for_each_entry(kwl, &acl_keywords.list, list) {
+ for (index = 0; kwl->kw[index].kw != NULL; index++) {
+ name = kwl->kw[index].fetch_kw;
+ if (!name)
+ name = kwl->kw[index].kw;
+
+ smp = find_sample_fetch(name, strlen(name));
+ if (!smp) {
+ ha_alert("Critical internal error: ACL keyword '%s' relies on sample fetch '%s' which was not registered!\n",
+ kwl->kw[index].kw, name);
+ err++;
+ continue;
+ }
+ kwl->kw[index].smp = smp;
+ }
+ }
+ return err;
+}
+
+/* dump known ACL keywords on stdout */
+void acl_dump_kwd(void)
+{
+ struct acl_kw_list *kwl;
+ const struct acl_keyword *kwp, *kw;
+ const char *name;
+ int index;
+
+ for (kw = kwp = NULL;; kwp = kw) {
+ list_for_each_entry(kwl, &acl_keywords.list, list) {
+ for (index = 0; kwl->kw[index].kw != NULL; index++) {
+ if (strordered(kwp ? kwp->kw : NULL,
+ kwl->kw[index].kw,
+ kw != kwp ? kw->kw : NULL))
+ kw = &kwl->kw[index];
+ }
+ }
+
+ if (kw == kwp)
+ break;
+
+ name = kw->fetch_kw;
+ if (!name)
+ name = kw->kw;
+
+ printf("%s = %s -m %s\n", kw->kw, name, pat_match_names[kw->match_type]);
+ }
+}
+
+void free_acl_cond(struct acl_cond *cond)
+{
+ struct acl_term_suite *suite, *suiteb;
+ struct acl_term *term, *termb;
+
+ if (!cond)
+ return;
+
+ list_for_each_entry_safe(suite, suiteb, &cond->suites, list) {
+ list_for_each_entry_safe(term, termb, &suite->terms, list) {
+ LIST_DELETE(&term->list);
+ free(term);
+ }
+ LIST_DELETE(&suite->list);
+ free(suite);
+ }
+
+ free(cond);
+}
+
+/************************************************************************/
+/* All supported sample and ACL keywords must be declared here. */
+/************************************************************************/
+
+/* Note: must not be declared <const> as its list will be overwritten.
+ * Please take care of keeping this list alphabetically sorted.
+ */
+static struct acl_kw_list acl_kws = {ILH, {
+ { /* END */ },
+}};
+
+INITCALL1(STG_REGISTER, acl_register_keywords, &acl_kws);
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */