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29d47b87c4
The map feature will need to match acl patterns. This patch extracts the matching function from the global ACL function "acl_exec_cond". The code was only moved to its own function, no functional changes were made.
255 lines
9.8 KiB
C
255 lines
9.8 KiB
C
/*
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* include/proto/acl.h
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* This file provides interface definitions for ACL manipulation.
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*
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* Copyright (C) 2000-2013 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_ACL_H
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#define _PROTO_ACL_H
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#include <common/config.h>
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#include <types/acl.h>
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#include <proto/sample.h>
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/*
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* FIXME: we need destructor functions too !
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*/
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/* Negate an acl result. This turns (ACL_PAT_FAIL, ACL_PAT_MISS, ACL_PAT_PASS)
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* into (ACL_PAT_PASS, ACL_PAT_MISS, ACL_PAT_FAIL).
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*/
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static inline int acl_neg(int res)
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{
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return (3 >> res);
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}
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/* Convert an acl result to a boolean. Only ACL_PAT_PASS returns 1. */
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static inline int acl_pass(int res)
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{
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return (res >> 1);
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}
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/* Return a pointer to the ACL <name> within the list starting at <head>, or
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* NULL if not found.
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*/
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struct acl *find_acl_by_name(const char *name, struct list *head);
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/* Return a pointer to the ACL keyword <kw> within the list starting at <head>,
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* or NULL if not found. Note that if <kw> contains an opening parenthesis,
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* only the left part of it is checked.
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*/
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struct acl_keyword *find_acl_kw(const char *kw);
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/* Parse an ACL expression starting at <args>[0], and return it.
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* Right now, the only accepted syntax is :
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* <subject> [<value>...]
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*/
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struct acl_expr *parse_acl_expr(const char **args, char **err, struct arg_list *al);
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/* Purge everything in the acl <acl>, then return <acl>. */
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struct acl *prune_acl(struct acl *acl);
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/* Parse an ACL with the name starting at <args>[0], and with a list of already
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* known ACLs in <acl>. If the ACL was not in the list, it will be added.
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* A pointer to that ACL is returned.
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*
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* args syntax: <aclname> <acl_expr>
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*/
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struct acl *parse_acl(const char **args, struct list *known_acl, char **err, struct arg_list *al);
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/* Purge everything in the acl_cond <cond>, then return <cond>. */
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struct acl_cond *prune_acl_cond(struct acl_cond *cond);
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/* Parse an ACL condition starting at <args>[0], relying on a list of already
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* known ACLs passed in <known_acl>. The new condition is returned (or NULL in
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* case of low memory). Supports multiple conditions separated by "or".
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*/
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struct acl_cond *parse_acl_cond(const char **args, struct list *known_acl, int pol, char **err, struct arg_list *al);
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/* Builds an ACL condition starting at the if/unless keyword. The complete
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* condition is returned. NULL is returned in case of error or if the first
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* word is neither "if" nor "unless". It automatically sets the file name and
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* the line number in the condition for better error reporting, and sets the
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* HTTP initialization requirements in the proxy. If <err> is not NULL, it will
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* be set to an error message upon errors, that the caller will have to free.
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*/
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struct acl_cond *build_acl_cond(const char *file, int line, struct proxy *px, const char **args, char **err);
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/* Execute condition <cond> and return either ACL_PAT_FAIL, ACL_PAT_MISS or
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* ACL_PAT_PASS depending on the test results. This function only computes the
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* condition, it does not apply the polarity required by IF/UNLESS, it's up to
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* the caller to do this.
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*/
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int acl_exec_cond(struct acl_cond *cond, struct proxy *px, struct session *l4, void *l7, unsigned int opt);
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/* Returns a pointer to the first ACL conflicting with usage at place <where>
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* which is one of the SMP_VAL_* bits indicating a check place, or NULL if
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* no conflict is found. Only full conflicts are detected (ACL is not usable).
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* Use the next function to check for useless keywords.
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*/
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const struct acl *acl_cond_conflicts(const struct acl_cond *cond, unsigned int where);
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/* Returns a pointer to the first ACL and its first keyword to conflict with
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* usage at place <where> which is one of the SMP_VAL_* bits indicating a check
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* place. Returns true if a conflict is found, with <acl> and <kw> set (if non
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* null), or false if not conflict is found. The first useless keyword is
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* returned.
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*/
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int acl_cond_kw_conflicts(const struct acl_cond *cond, unsigned int where, struct acl const **acl, char const **kw);
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/* parse the <text> with <expr> compliant parser. <pattern> is a context for
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* the current parsed acl. It must initialized at NULL:
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*
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* struct acl_pattern *pattern = NULL
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* acl_register_pattern(..., &pattern, ...);
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*
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* patflag are a combination of 'ACL_PAT_F_*' flags pattern compatible. see
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* <types/acl.h>.
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*
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* The function returns 1 if the processing is ok, return -1 if the parser
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* fails, with <err> message filled. It returns -2 in "out of memory"
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* error case.
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*/
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int acl_register_pattern(struct acl_expr *expr, char *text, struct acl_pattern **pattern, int patflags, char **err);
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/*
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* Find targets for userlist and groups in acl. Function returns the number
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* of errors or OK if everything is fine.
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*/
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int acl_find_targets(struct proxy *p);
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/* Return a pointer to the ACL <name> within the list starting at <head>, or
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* NULL if not found.
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*/
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struct acl *find_acl_by_name(const char *name, struct list *head);
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/* This function execute the match part of the acl.
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* it return ACL_PAT_FAIL, ACL_PAT_MISS or ACL_PAT_PASS
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*/
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inline int acl_exec_match(struct acl_expr *expr, struct sample *smp);
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/*
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* Registers the ACL keyword list <kwl> as a list of valid keywords for next
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* parsing sessions.
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*/
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void acl_register_keywords(struct acl_kw_list *kwl);
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/*
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* Unregisters the ACL keyword list <kwl> from the list of valid keywords.
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*/
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void acl_unregister_keywords(struct acl_kw_list *kwl);
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/* initializes ACLs by resolving the sample fetch names they rely upon.
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* Returns 0 on success, otherwise an error.
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*/
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int init_acl();
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/*
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*
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* The following functions are general purpose ACL matching functions.
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*
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*/
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/* ignore the current line */
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int acl_parse_nothing(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* NB: For two strings to be identical, it is required that their lengths match */
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int acl_match_str(struct sample *smp, struct acl_pattern *pattern);
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/* NB: For two binary buffers to be identical, it is required that their lengths match */
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int acl_match_bin(struct sample *smp, struct acl_pattern *pattern);
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/* Checks that the length of the pattern in <test> is included between min and max */
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int acl_match_len(struct sample *smp, struct acl_pattern *pattern);
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/* Checks that the integer in <test> is included between min and max */
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int acl_match_int(struct sample *smp, struct acl_pattern *pattern);
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/* Parse an integer. It is put both in min and max. */
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int acl_parse_int(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* Parse an version. It is put both in min and max. */
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int acl_parse_dotted_ver(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* Parse a range of integers delimited by either ':' or '-'. If only one
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* integer is read, it is set as both min and max.
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*/
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int acl_parse_range(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* Parse a string. It is allocated and duplicated. */
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int acl_parse_str(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* Parse a hexa binary definition. It is allocated and duplicated. */
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int acl_parse_bin(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* Parse and concatenate strings into one. It is allocated and duplicated. */
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int acl_parse_strcat(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* Parse a regex. It is allocated. */
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int acl_parse_reg(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* Parse an IP address and an optional mask in the form addr[/mask].
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* The addr may either be an IPv4 address or a hostname. The mask
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* may either be a dotted mask or a number of bits. Returns 1 if OK,
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* otherwise 0.
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*/
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int acl_parse_ip(const char **text, struct acl_pattern *pattern, int *opaque, char **err);
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/* always return false */
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int acl_match_nothing(struct sample *smp, struct acl_pattern *pattern);
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/* Checks that the pattern matches the end of the tested string. */
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int acl_match_end(struct sample *smp, struct acl_pattern *pattern);
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/* Checks that the pattern matches the beginning of the tested string. */
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int acl_match_beg(struct sample *smp, struct acl_pattern *pattern);
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/* Checks that the pattern is included inside the tested string. */
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int acl_match_sub(struct sample *smp, struct acl_pattern *pattern);
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/* Checks that the pattern is included inside the tested string, but enclosed
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* between slashes or at the beginning or end of the string. Slashes at the
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* beginning or end of the pattern are ignored.
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*/
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int acl_match_dir(struct sample *smp, struct acl_pattern *pattern);
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/* Checks that the pattern is included inside the tested string, but enclosed
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* between dots or at the beginning or end of the string. Dots at the beginning
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* or end of the pattern are ignored.
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*/
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int acl_match_dom(struct sample *smp, struct acl_pattern *pattern);
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/* Check that the IPv4 address in <test> matches the IP/mask in pattern */
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int acl_match_ip(struct sample *smp, struct acl_pattern *pattern);
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/* Executes a regex. It temporarily changes the data to add a trailing zero,
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* and restores the previous character when leaving.
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*/
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int acl_match_reg(struct sample *smp, struct acl_pattern *pattern);
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#endif /* _PROTO_ACL_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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