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299 lines
7.0 KiB
C
299 lines
7.0 KiB
C
/* $OpenLDAP$
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*/
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 2000-2010 The OpenLDAP Foundation.
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* Portions Copyright 2000-2003 Pierangelo Masarati.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* ACKNOWLEDGEMENT:
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* This work was initially developed by Pierangelo Masarati for
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* inclusion in OpenLDAP Software.
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*/
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#ifndef REWRITE_H
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#define REWRITE_H
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/*
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* Default rewrite context
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*/
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#define REWRITE_DEFAULT_CONTEXT "default"
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/*
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* Rewrite engine states
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*/
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#define REWRITE_OFF 0x0000
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#define REWRITE_ON 0x0001
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#define REWRITE_DEFAULT REWRITE_OFF
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/*
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* Rewrite internal status returns
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*/
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#define REWRITE_SUCCESS LDAP_SUCCESS
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#define REWRITE_ERR LDAP_OTHER
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/*
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* Rewrite modes (input values for rewrite_info_init); determine the
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* behavior in case a null or non existent context is required:
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*
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* REWRITE_MODE_ERR error
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* REWRITE_MODE_OK no error but no rewrite
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* REWRITE_MODE_COPY_INPUT a copy of the input is returned
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* REWRITE_MODE_USE_DEFAULT the default context is used.
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*/
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#define REWRITE_MODE_ERR 0x0010
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#define REWRITE_MODE_OK 0x0011
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#define REWRITE_MODE_COPY_INPUT 0x0012
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#define REWRITE_MODE_USE_DEFAULT 0x0013
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/*
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* Rewrite status returns
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*
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* REWRITE_REGEXEC_OK success (result may be empty in case
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* of no match)
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* REWRITE_REGEXEC_ERR error (internal error,
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* misconfiguration, map not working ...)
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* REWRITE_REGEXEC_STOP internal use; never returned
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* REWRITE_REGEXEC_UNWILLING the server should issue an 'unwilling
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* to perform' error
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*/
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#define REWRITE_REGEXEC_OK (0)
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#define REWRITE_REGEXEC_ERR (-1)
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#define REWRITE_REGEXEC_STOP (-2)
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#define REWRITE_REGEXEC_UNWILLING (-3)
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#define REWRITE_REGEXEC_USER (1) /* and above: LDAP errors */
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/*
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* Rewrite variable flags
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* REWRITE_VAR_INSERT insert mode (default) when adding
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* a variable; if not set during value
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* update, the variable is not inserted
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* if not present
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* REWRITE_VAR_UPDATE update mode (default) when updating
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* a variable; if not set during insert,
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* the value is not updated if the
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* variable already exists
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* REWRITE_VAR_COPY_NAME copy the variable name; if not set,
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* the name is not copied; be sure the
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* referenced string is available for
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* the entire life scope of the variable.
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* REWRITE_VAR_COPY_VALUE copy the variable value; if not set,
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* the value is not copied; be sure the
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* referenced string is available for
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* the entire life scope of the variable.
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*/
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#define REWRITE_VAR_NONE 0x0000
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#define REWRITE_VAR_INSERT 0x0001
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#define REWRITE_VAR_UPDATE 0x0002
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#define REWRITE_VAR_COPY_NAME 0x0004
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#define REWRITE_VAR_COPY_VALUE 0x0008
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/*
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* Rewrite info
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*/
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struct rewrite_info;
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struct berval; /* avoid include */
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LDAP_BEGIN_DECL
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/*
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* Inits the info
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*/
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LDAP_REWRITE_F (struct rewrite_info *)
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rewrite_info_init(
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int mode
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);
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/*
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* Cleans up the info structure
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*/
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LDAP_REWRITE_F (int)
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rewrite_info_delete(
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struct rewrite_info **info
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);
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/*
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* Parses a config line and takes actions to fit content in rewrite structure;
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* lines handled are of the form:
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*
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* rewriteEngine {on|off}
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* rewriteMaxPasses numPasses
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* rewriteContext contextName [alias aliasedRewriteContex]
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* rewriteRule pattern substPattern [ruleFlags]
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* rewriteMap mapType mapName [mapArgs]
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* rewriteParam paramName paramValue
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*/
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LDAP_REWRITE_F (int)
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rewrite_parse(
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struct rewrite_info *info,
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const char *fname,
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int lineno,
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int argc,
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char **argv
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);
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/*
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* process a config file that was already opened. Uses rewrite_parse.
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*/
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LDAP_REWRITE_F (int)
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rewrite_read(
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FILE *fin,
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struct rewrite_info *info
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);
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/*
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* Rewrites a string according to context.
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* If the engine is off, OK is returned, but the return string will be NULL.
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* In case of 'unwilling to perform', UNWILLING is returned, and the
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* return string will also be null. The same in case of error.
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* Otherwise, OK is returned, and result will hold a newly allocated string
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* with the rewriting.
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*
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* What to do in case of non-existing rewrite context is still an issue.
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* Four possibilities:
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* - error,
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* - ok with NULL result,
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* - ok with copy of string as result,
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* - use the default rewrite context.
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*/
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LDAP_REWRITE_F (int)
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rewrite(
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struct rewrite_info *info,
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const char *rewriteContext,
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const char *string,
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char **result
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);
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/*
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* Same as above; the cookie relates the rewrite to a session
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*/
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LDAP_REWRITE_F (int)
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rewrite_session(
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struct rewrite_info *info,
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const char *rewriteContext,
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const char *string,
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const void *cookie,
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char **result
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);
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/*
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* Inits a session
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*/
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LDAP_REWRITE_F (struct rewrite_session *)
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rewrite_session_init(
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struct rewrite_info *info,
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const void *cookie
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);
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/*
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* Defines and inits a variable with session scope
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*/
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LDAP_REWRITE_F (int)
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rewrite_session_var_set_f(
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struct rewrite_info *info,
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const void *cookie,
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const char *name,
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const char *value,
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int flags
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);
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#define rewrite_session_var_set(info, cookie, name, value) \
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rewrite_session_var_set_f((info), (cookie), (name), (value), \
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REWRITE_VAR_INSERT|REWRITE_VAR_UPDATE|REWRITE_VAR_COPY_NAME|REWRITE_VAR_COPY_VALUE)
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/*
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* Deletes a session
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*/
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LDAP_REWRITE_F (int)
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rewrite_session_delete(
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struct rewrite_info *info,
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const void *cookie
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);
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/*
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* Params
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*/
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/*
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* Defines and inits a variable with global scope
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*/
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LDAP_REWRITE_F (int)
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rewrite_param_set(
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struct rewrite_info *info,
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const char *name,
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const char *value
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);
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/*
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* Gets a var with global scope
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*/
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LDAP_REWRITE_F (int)
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rewrite_param_get(
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struct rewrite_info *info,
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const char *name,
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struct berval *value
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);
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/*
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* Destroys the parameter tree
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*/
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LDAP_REWRITE_F (int)
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rewrite_param_destroy(
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struct rewrite_info *info
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);
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/*
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* Mapping implementations
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*/
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struct rewrite_mapper;
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typedef void * (rewrite_mapper_config)(
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const char *fname,
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int lineno,
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int argc,
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char **argv );
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typedef int (rewrite_mapper_apply)(
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void *ctx,
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const char *arg,
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struct berval *retval );
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typedef int (rewrite_mapper_destroy)(
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void *ctx );
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typedef struct rewrite_mapper {
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char *rm_name;
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rewrite_mapper_config *rm_config;
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rewrite_mapper_apply *rm_apply;
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rewrite_mapper_destroy *rm_destroy;
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} rewrite_mapper;
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/* For dynamic loading and unloading of mappers */
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LDAP_REWRITE_F (int)
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rewrite_mapper_register(
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const rewrite_mapper *map );
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LDAP_REWRITE_F (int)
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rewrite_mapper_unregister(
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const rewrite_mapper *map );
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LDAP_REWRITE_F (const rewrite_mapper *)
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rewrite_mapper_find(
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const char *name );
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LDAP_END_DECL
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#endif /* REWRITE_H */
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