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/*
* include/proto/acl.h
* This file provides interface definitions for ACL manipulation.
*
* Copyright (C) 2000-2013 Willy Tarreau - w@1wt.eu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _PROTO_ACL_H
#define _PROTO_ACL_H
#include <common/config.h>
#include <types/acl.h>
#include <proto/sample.h>
/*
* FIXME: we need destructor functions too !
*/
/* Negate an acl result. This turns (ACL_PAT_FAIL, ACL_PAT_MISS, ACL_PAT_PASS)
* into (ACL_PAT_PASS, ACL_PAT_MISS, ACL_PAT_FAIL).
*/
static inline int acl_neg(int res)
{
return (3 >> res);
}
/* Convert an acl result to a boolean. Only ACL_PAT_PASS returns 1. */
static inline int acl_pass(int res)
{
return (res >> 1);
}
/* 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);
/* Return a pointer to the ACL keyword <kw> within the list starting at <head>,
* or NULL if not found. Note that if <kw> contains an opening parenthesis,
* only the left part of it is checked.
*/
struct acl_keyword *find_acl_kw(const char *kw);
/* Parse an ACL expression starting at <args>[0], and return it.
* Right now, the only accepted syntax is :
* <subject> [<value>...]
*/
struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al);
/* Purge everything in the acl <acl>, then return <acl>. */
struct acl *prune_acl(struct acl *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.
*
* args syntax: <aclname> <acl_expr>
*/
struct acl *parse_acl(const char **args, struct list *known_acl, char **err, struct arg_list *al);
/* Purge everything in the acl_cond <cond>, then return <cond>. */
struct acl_cond *prune_acl_cond(struct acl_cond *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".
*/
struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl, int pol, char **err, struct arg_list *al);
/* 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 initialization requirements in the proxy. If <err> is not NULL, it will
* be set to an error message upon errors, that the caller will have to free.
*/
struct acl_cond *build_acl_cond(const char *file, int line, struct proxy *px, const char **args, char **err);
/* Execute condition <cond> and return either ACL_PAT_FAIL, ACL_PAT_MISS or
* ACL_PAT_PASS depending on the test results. 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.
*/
int acl_exec_cond(struct acl_cond *cond, struct proxy *px, struct session *l4, void *l7, unsigned int opt);
/* 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);
/* 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);
/*
* Find targets for userlist and groups in acl. Function returns the number
* of errors or OK if everything is fine.
*/
int acl_find_targets(struct proxy *p);
/* 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);
/*
* 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);
/*
* Unregisters the ACL keyword list <kwl> from the list of valid keywords.
*/
void acl_unregister_keywords(struct acl_kw_list *kwl);
/* initializes ACLs by resolving the sample fetch names they rely upon.
* Returns 0 on success, otherwise an error.
*/
int init_acl();
/*
*
* The following functions are general purpose ACL matching functions.
*
*/
/* ignore the current line */
int acl_parse_nothing(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* NB: For two strings to be identical, it is required that their lengths match */
int acl_match_str(struct sample *smp, struct acl_pattern *pattern);
/* NB: For two binary buffers to be identical, it is required that their lengths match */
int acl_match_bin(struct sample *smp, struct acl_pattern *pattern);
/* Checks that the length of the pattern in <test> is included between min and max */
int acl_match_len(struct sample *smp, struct acl_pattern *pattern);
/* Checks that the integer in <test> is included between min and max */
int acl_match_int(struct sample *smp, struct acl_pattern *pattern);
/* Parse an integer. It is put both in min and max. */
int acl_parse_int(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* Parse an version. It is put both in min and max. */
int acl_parse_dotted_ver(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* Parse a range of integers delimited by either ':' or '-'. If only one
* integer is read, it is set as both min and max.
*/
int acl_parse_range(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* Parse a string. It is allocated and duplicated. */
int acl_parse_str(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* Parse a hexa binary definition. It is allocated and duplicated. */
int acl_parse_bin(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* Parse and concatenate strings into one. It is allocated and duplicated. */
int acl_parse_strcat(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* Parse a regex. It is allocated. */
int acl_parse_reg(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* Parse an IP address and an optional mask in the form addr[/mask].
* The addr may either be an IPv4 address or a hostname. The mask
* may either be a dotted mask or a number of bits. Returns 1 if OK,
* otherwise 0.
*/
int acl_parse_ip(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
/* always return false */
int acl_match_nothing(struct sample *smp, struct acl_pattern *pattern);
/* Checks that the pattern matches the end of the tested string. */
int acl_match_end(struct sample *smp, struct acl_pattern *pattern);
/* Checks that the pattern matches the beginning of the tested string. */
int acl_match_beg(struct sample *smp, struct acl_pattern *pattern);
/* Checks that the pattern is included inside the tested string. */
int acl_match_sub(struct sample *smp, struct acl_pattern *pattern);
/* Checks that the pattern is included inside the tested string, but enclosed
* between slashes or at the beginning or end of the string. Slashes at the
* beginning or end of the pattern are ignored.
*/
int acl_match_dir(struct sample *smp, struct acl_pattern *pattern);
/* Checks that the pattern is included inside the tested string, but enclosed
* between dots or at the beginning or end of the string. Dots at the beginning
* or end of the pattern are ignored.
*/
int acl_match_dom(struct sample *smp, struct acl_pattern *pattern);
/* Check that the IPv4 address in <test> matches the IP/mask in pattern */
int acl_match_ip(struct sample *smp, struct acl_pattern *pattern);
/* Executes a regex. It temporarily changes the data to add a trailing zero,
* and restores the previous character when leaving.
*/
int acl_match_reg(struct sample *smp, struct acl_pattern *pattern);
#endif /* _PROTO_ACL_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/