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Diffstat (limited to 'libapol/include/apol/range_trans-query.h')
-rw-r--r-- | libapol/include/apol/range_trans-query.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/libapol/include/apol/range_trans-query.h b/libapol/include/apol/range_trans-query.h new file mode 100644 index 0000000..e3113c5 --- /dev/null +++ b/libapol/include/apol/range_trans-query.h @@ -0,0 +1,198 @@ +/** + * @file + * + * Routines to query range transition rules of a policy. + * + * @author Jeremy A. Mowery jmowery@tresys.com + * @author Jason Tang jtang@tresys.com + * + * Copyright (C) 2006-2007 Tresys Technology, LLC + * + * 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; either + * version 2.1 of the License, or (at your option) any later version. + * + * 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 St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef APOL_RANGE_TRANS_QUERY_H +#define APOL_RANGE_TRANS_QUERY_H + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include "mls_range.h" +#include "policy.h" +#include "vector.h" +#include <qpol/policy.h> + + typedef struct apol_range_trans_query apol_range_trans_query_t; + +/** + * Execute a query against all range transition rules within the + * policy. + * + * @param p Policy within which to look up terules. + * @param r Structure containing parameters for query. If this is + * NULL then return all range transitions. + * @param v Reference to a vector of qpol_range_trans_t. The vector + * will be allocated by this function. The caller must call + * apol_vector_destroy() afterwards. This will be set to NULL upon + * error. + * + * @return 0 on success (including none found), negative on error. + */ + extern int apol_range_trans_get_by_query(const apol_policy_t * p, const apol_range_trans_query_t * r, apol_vector_t ** v); + +/** + * Allocate and return a new range trans query structure. All fields + * are initialized, such that running this blank query results in + * returning all range transitions within the policy. The caller must + * call apol_range_trans_query_destroy() upon the return value + * afterwards. + * + * @return An initialized range trans structure, or NULL upon error. + */ + extern apol_range_trans_query_t *apol_range_trans_query_create(void); + +/** + * Deallocate all memory associated with the referenced range trans + * query, and then set it to NULL. This function does nothing if the + * query is already NULL. + * + * @param r Reference to a range trans query structure to destroy. + */ + extern void apol_range_trans_query_destroy(apol_range_trans_query_t ** r); + +/** + * Set a range trans query to return rules whose source symbol matches + * symbol. Symbol may be a type or attribute; if it is an alias then + * the query will convert it to its primary prior to searching. If + * is_indirect is non-zero then the search will be done indirectly. + * If the symbol is a type, then the query matches rules with one of + * the type's attributes. If the symbol is an attribute, then it + * matches rule with any of the attribute's types. + * + * @param p Policy handler, to report errors. + * @param r Range trans rule query to set. + * @param symbol Limit query to rules with this symbol as their + * source, or NULL to unset this field. + * @param is_indirect If non-zero, perform indirect matching. + * + * @return 0 on success, negative on error. + */ + extern int apol_range_trans_query_set_source(const apol_policy_t * p, apol_range_trans_query_t * r, const char *symbol, + int is_indirect); + +/** + * Set a range trans query to return rules whose target symbol matches + * symbol. Symbol may be a type or attribute; if it is an alias then + * the query will convert it to its primary prior to searching. If + * is_indirect is non-zero then the search will be done indirectly. + * If the symbol is a type, then the query matches rules with one of + * the type's attributes. If the symbol is an attribute, then it + * matches rule with any of the attribute's types. + * + * @param p Policy handler, to report errors. + * @param r Range trans query to set. + * @param symbol Limit query to rules with this symbol as their + * target, or NULL to unset this field. + * @param is_indirect If non-zero, perform indirect matching. + * + * @return 0 on success, negative on error. + */ + extern int apol_range_trans_query_set_target(const apol_policy_t * p, apol_range_trans_query_t * r, const char *symbol, + int is_indirect); + +/** + * Set a range trans query to return rules whose object class matches + * symbol. If more than one class are appended to the query, the + * rule's class must be one of those appended. (I.e., the rule's + * class must be a member of the query's classes.) Pass a NULL to + * clear all classes. Note that this performs straight string + * comparison, ignoring the regex flag. + * + * @param p Policy handler, to report errors. + * @param r Range trans query to set. + * @param obj_class Name of object class to add to search set, or NULL + * to clear all classes. + * + * @return 0 on success, negative on error. + */ + extern int apol_range_trans_query_append_class(const apol_policy_t * p, apol_range_trans_query_t * r, + const char *obj_class); + +/** + * Set a range trans query to return only rules matching a MLS range. + * This function takes ownership of the range, such that the caller + * must not modify nor destroy it afterwards. + * + * @param p Policy handler, to report errors. + * @param r Range trans query to set. + * @param range Limit query to only rules matching this range, or NULL + * to unset this field. + * @param range_match Specifies how to match a rules to a range. This + * must be one of APOL_QUERY_SUB, APOL_QUERY_SUPER, or + * APOL_QUERY_EXACT. This parameter is ignored if range is NULL. + * + * @return Always returns 0. + */ + extern int apol_range_trans_query_set_range(const apol_policy_t * p, + apol_range_trans_query_t * r, apol_mls_range_t * range, + unsigned int range_match); + +/** + * Set a range trans query to treat the source symbol as any. That + * is, use the same symbol for either source or target of a rule. + * This flag does nothing if the source symbol is not set. + * + * @param p Policy handler, to report errors. + * @param r Range trans rule query to set. + * @param is_any Non-zero to use source symbol for any field, 0 to + * keep source as only source. + * + * @return Always 0. + */ + extern int apol_range_trans_query_set_source_any(const apol_policy_t * p, apol_range_trans_query_t * r, int is_any); + +/** + * Set a range trans query to use regular expression searching for + * source and target types/attributes. Strings will be treated as + * regexes instead of literals. Matching will occur against the type + * name or any of its aliases. + * + * @param p Policy handler, to report errors. + * @param r Range trans rule query to set. + * @param is_regex Non-zero to enable regex searching, 0 to disable. + * + * @return Always 0. + */ + extern int apol_range_trans_query_set_regex(const apol_policy_t * p, apol_range_trans_query_t * t, int is_regex); + +/** + * Render a range transition to a string. + * + * @param policy Policy handler, to report errors. + * @param rule The rule to render. + * + * @return a newly malloc()'d string representation of the rule, or NULL on + * failure; if the call fails, errno will be set. The caller is responsible + * for calling free() on the returned string. + */ + extern char *apol_range_trans_render(const apol_policy_t * policy, const qpol_range_trans_t * rule); + +#ifdef __cplusplus +} +#endif + +#endif |