215 lines
7.8 KiB
C
215 lines
7.8 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) 2000-2010 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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/*
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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);
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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);
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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);
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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 adds the
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* ACL requirements to the proxy's acl_requires.
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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);
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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, int dir);
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/* Reports a pointer to the first ACL used in condition <cond> which requires
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* at least one of the USE_FLAGS in <require>. Returns NULL if none matches.
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*/
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struct acl *cond_find_require(const struct acl_cond *cond, unsigned int require);
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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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/*
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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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/*
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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);
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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 acl_test *test, 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 acl_test *test, 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);
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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);
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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);
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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);
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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);
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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);
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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);
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/* always fake a data retrieval */
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int acl_fetch_nothing(struct proxy *px, struct session *l4, void *l7, int dir,
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struct acl_expr *expr, struct acl_test *test);
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/* always return false */
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int acl_match_nothing(struct acl_test *test, 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 acl_test *test, 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 acl_test *test, 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 acl_test *test, 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 acl_test *test, 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 acl_test *test, 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 acl_test *test, struct acl_pattern *pattern);
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/* Executes a regex. It needs to change the data. If it is marked READ_ONLY
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* then it will be allocated and duplicated in place so that others may use
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* it later on. Note that this is embarrassing because we always try to avoid
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* allocating memory at run time.
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*/
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int acl_match_reg(struct acl_test *test, 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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