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Diffstat (limited to '')
| -rw-r--r-- | include/rewrite.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/include/rewrite.h b/include/rewrite.h new file mode 100644 index 0000000..52d43be --- /dev/null +++ b/include/rewrite.h @@ -0,0 +1,298 @@ +/* $OpenLDAP$ + */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2000-2022 The OpenLDAP Foundation. + * Portions Copyright 2000-2003 Pierangelo Masarati. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* ACKNOWLEDGEMENT: + * This work was initially developed by Pierangelo Masarati for + * inclusion in OpenLDAP Software. + */ + +#ifndef REWRITE_H +#define REWRITE_H + +/* + * Default rewrite context + */ +#define REWRITE_DEFAULT_CONTEXT "default" + +/* + * Rewrite engine states + */ +#define REWRITE_OFF 0x0000 +#define REWRITE_ON 0x0001 +#define REWRITE_DEFAULT REWRITE_OFF + +/* + * Rewrite internal status returns + */ +#define REWRITE_SUCCESS LDAP_SUCCESS +#define REWRITE_ERR LDAP_OTHER + +/* + * Rewrite modes (input values for rewrite_info_init); determine the + * behavior in case a null or non existent context is required: + * + * REWRITE_MODE_ERR error + * REWRITE_MODE_OK no error but no rewrite + * REWRITE_MODE_COPY_INPUT a copy of the input is returned + * REWRITE_MODE_USE_DEFAULT the default context is used. + */ +#define REWRITE_MODE_ERR 0x0010 +#define REWRITE_MODE_OK 0x0011 +#define REWRITE_MODE_COPY_INPUT 0x0012 +#define REWRITE_MODE_USE_DEFAULT 0x0013 + +/* + * Rewrite status returns + * + * REWRITE_REGEXEC_OK success (result may be empty in case + * of no match) + * REWRITE_REGEXEC_ERR error (internal error, + * misconfiguration, map not working ...) + * REWRITE_REGEXEC_STOP internal use; never returned + * REWRITE_REGEXEC_UNWILLING the server should issue an 'unwilling + * to perform' error + */ +#define REWRITE_REGEXEC_OK (0) +#define REWRITE_REGEXEC_ERR (-1) +#define REWRITE_REGEXEC_STOP (-2) +#define REWRITE_REGEXEC_UNWILLING (-3) +#define REWRITE_REGEXEC_USER (1) /* and above: LDAP errors */ + +/* + * Rewrite variable flags + * REWRITE_VAR_INSERT insert mode (default) when adding + * a variable; if not set during value + * update, the variable is not inserted + * if not present + * REWRITE_VAR_UPDATE update mode (default) when updating + * a variable; if not set during insert, + * the value is not updated if the + * variable already exists + * REWRITE_VAR_COPY_NAME copy the variable name; if not set, + * the name is not copied; be sure the + * referenced string is available for + * the entire life scope of the variable. + * REWRITE_VAR_COPY_VALUE copy the variable value; if not set, + * the value is not copied; be sure the + * referenced string is available for + * the entire life scope of the variable. + */ +#define REWRITE_VAR_NONE 0x0000 +#define REWRITE_VAR_INSERT 0x0001 +#define REWRITE_VAR_UPDATE 0x0002 +#define REWRITE_VAR_COPY_NAME 0x0004 +#define REWRITE_VAR_COPY_VALUE 0x0008 + +/* + * Rewrite info + */ +struct rewrite_info; + +struct berval; /* avoid include */ + +LDAP_BEGIN_DECL + +/* + * Inits the info + */ +LDAP_REWRITE_F (struct rewrite_info *) +rewrite_info_init( + int mode +); + +/* + * Cleans up the info structure + */ +LDAP_REWRITE_F (int) +rewrite_info_delete( + struct rewrite_info **info +); + + +/* + * Parses a config line and takes actions to fit content in rewrite structure; + * lines handled are of the form: + * + * rewriteEngine {on|off} + * rewriteMaxPasses numPasses + * rewriteContext contextName [alias aliasedRewriteContex] + * rewriteRule pattern substPattern [ruleFlags] + * rewriteMap mapType mapName [mapArgs] + * rewriteParam paramName paramValue + */ +LDAP_REWRITE_F (int) +rewrite_parse( + struct rewrite_info *info, + const char *fname, + int lineno, + int argc, + char **argv +); + +/* + * process a config file that was already opened. Uses rewrite_parse. + */ +LDAP_REWRITE_F (int) +rewrite_read( + FILE *fin, + struct rewrite_info *info +); + +/* + * Rewrites a string according to context. + * If the engine is off, OK is returned, but the return string will be NULL. + * In case of 'unwilling to perform', UNWILLING is returned, and the + * return string will also be null. The same in case of error. + * Otherwise, OK is returned, and result will hold a newly allocated string + * with the rewriting. + * + * What to do in case of non-existing rewrite context is still an issue. + * Four possibilities: + * - error, + * - ok with NULL result, + * - ok with copy of string as result, + * - use the default rewrite context. + */ +LDAP_REWRITE_F (int) +rewrite( + struct rewrite_info *info, + const char *rewriteContext, + const char *string, + char **result +); + +/* + * Same as above; the cookie relates the rewrite to a session + */ +LDAP_REWRITE_F (int) +rewrite_session( + struct rewrite_info *info, + const char *rewriteContext, + const char *string, + const void *cookie, + char **result +); + +/* + * Inits a session + */ +LDAP_REWRITE_F (struct rewrite_session *) +rewrite_session_init( + struct rewrite_info *info, + const void *cookie +); + +/* + * Defines and inits a variable with session scope + */ +LDAP_REWRITE_F (int) +rewrite_session_var_set_f( + struct rewrite_info *info, + const void *cookie, + const char *name, + const char *value, + int flags +); + +#define rewrite_session_var_set(info, cookie, name, value) \ + rewrite_session_var_set_f((info), (cookie), (name), (value), \ + REWRITE_VAR_INSERT|REWRITE_VAR_UPDATE|REWRITE_VAR_COPY_NAME|REWRITE_VAR_COPY_VALUE) + +/* + * Deletes a session + */ +LDAP_REWRITE_F (int) +rewrite_session_delete( + struct rewrite_info *info, + const void *cookie +); + + +/* + * Params + */ + +/* + * Defines and inits a variable with global scope + */ +LDAP_REWRITE_F (int) +rewrite_param_set( + struct rewrite_info *info, + const char *name, + const char *value +); + +/* + * Gets a var with global scope + */ +LDAP_REWRITE_F (int) +rewrite_param_get( + struct rewrite_info *info, + const char *name, + struct berval *value +); + +/* + * Destroys the parameter tree + */ +LDAP_REWRITE_F (int) +rewrite_param_destroy( + struct rewrite_info *info +); + +/* + * Mapping implementations + */ + +struct rewrite_mapper; + +typedef void * (rewrite_mapper_config)( + const char *fname, + int lineno, + int argc, + char **argv ); + +typedef int (rewrite_mapper_apply)( + void *ctx, + const char *arg, + struct berval *retval ); + +typedef int (rewrite_mapper_destroy)( + void *ctx ); + +typedef struct rewrite_mapper { + char *rm_name; + rewrite_mapper_config *rm_config; + rewrite_mapper_apply *rm_apply; + rewrite_mapper_destroy *rm_destroy; +} rewrite_mapper; + +/* For dynamic loading and unloading of mappers */ +LDAP_REWRITE_F (int) +rewrite_mapper_register( + const rewrite_mapper *map ); + +LDAP_REWRITE_F (int) +rewrite_mapper_unregister( + const rewrite_mapper *map ); + +LDAP_REWRITE_F (const rewrite_mapper *) +rewrite_mapper_find( + const char *name ); + +LDAP_END_DECL + +#endif /* REWRITE_H */ |