110 lines
4.4 KiB
C
110 lines
4.4 KiB
C
/* Author : Joshua Brindle <jbrindle@tresys.com>
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* Karl MacMillan <kmacmillan@tresys.com>
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* Jason Tang <jtang@tresys.com>
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* Added support for binary policy modules
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*
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* Copyright (C) 2004 - 2005 Tresys Technology, LLC
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2.
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*/
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#ifndef MODULE_COMPILER_H
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#define MODULE_COMPILER_H
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#include <sepol/policydb/hashtab.h>
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/* Called when checkpolicy begins to parse a policy -- either at the
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* very beginning for a kernel/base policy, or after the module header
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* for policy modules. Initialize the memory structures within.
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* Return 0 on success, -1 on error. */
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int define_policy(int pass, int module_header_given);
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/* Declare a symbol declaration to the current avrule_decl. Check
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* that insertion is allowed here and that the symbol does not already
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* exist. Returns 0 on success, 1 if symbol was already there (caller
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* needs to free() the datum), -1 if declarations not allowed, -2 for
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* duplicate declarations, -3 for all else.
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*/
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int declare_symbol(uint32_t symbol_type,
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hashtab_key_t key, hashtab_datum_t datum,
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uint32_t * dest_value, uint32_t * datum_value);
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role_datum_t *declare_role(unsigned char isattr);
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type_datum_t *declare_type(unsigned char primary, unsigned char isattr);
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user_datum_t *declare_user(void);
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type_datum_t *get_local_type(char *id, uint32_t value, unsigned char isattr);
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role_datum_t *get_local_role(char *id, uint32_t value, unsigned char isattr);
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/* Add a symbol to the current avrule_block's require section. Note
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* that a module may not both declare and require the same symbol.
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* Returns 0 on success, -1 on error. */
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int require_symbol(uint32_t symbol_type,
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hashtab_key_t key, hashtab_datum_t datum,
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uint32_t * dest_value, uint32_t * datum_value);
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/* Enable a permission for a class within the current avrule_decl.
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* Return 0 on success, -1 if out of memory. */
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int add_perm_to_class(uint32_t perm_value, uint32_t class_value);
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/* Functions called from REQUIRE blocks. Add the first symbol on the
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* id_queue to this avrule_decl's scope if not already there.
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* c.f. require_symbol(). */
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int require_class(int pass);
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int require_role(int pass);
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int require_type(int pass);
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int require_attribute(int pass);
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int require_attribute_role(int pass);
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int require_user(int pass);
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int require_bool(int pass);
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int require_tunable(int pass);
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int require_sens(int pass);
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int require_cat(int pass);
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/* Check if an identifier is within the scope of the current
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* declaration or any of its parents. Return 1 if it is, 0 if not.
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* If the identifier is not known at all then return 1 (truth). */
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int is_id_in_scope(uint32_t symbol_type, hashtab_key_t id);
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/* Check if a particular permission is within the scope of the current
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* declaration or any of its parents. Return 1 if it is, 0 if not.
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* If the identifier is not known at all then return 1 (truth). */
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int is_perm_in_scope(hashtab_key_t perm_id, hashtab_key_t class_id);
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/* Search the current avrules block for a conditional with the same
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* expression as 'cond'. If the conditional does not exist then
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* create one. Either way, return the conditional. */
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cond_list_t *get_current_cond_list(cond_list_t * cond);
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/* Append rule to the current avrule_block. */
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void append_cond_list(cond_list_t * cond);
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void append_avrule(avrule_t * avrule);
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void append_role_trans(role_trans_rule_t * role_tr_rules);
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void append_role_allow(role_allow_rule_t * role_allow_rules);
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void append_range_trans(range_trans_rule_t * range_tr_rules);
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void append_filename_trans(filename_trans_rule_t * filename_trans_rules);
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/* Create a new optional block and add it to the global policy.
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* During the second pass resolve the block's requirements. Return 0
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* on success, -1 on error.
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*/
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int begin_optional(int pass);
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int end_optional(int pass);
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/* ELSE blocks are similar to normal blocks with the following two
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* limitations:
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* - no declarations are allowed within else branches
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* - no REQUIRES are allowed; the else branch inherits the parent's
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* requirements
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*/
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int begin_optional_else(int pass);
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/* Called whenever existing an avrule block. Check that the block had
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* a non-empty REQUIRE section. If so pop the block off of the scop
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* stack and return 0. If not then send an error to yyerror and
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* return -1. */
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int end_avrule_block(int pass);
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#endif
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