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/**
* @file
* Protected interface for role allow rule and role_transition rule
* differences.
*
* @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 POLDIFF_RBAC_INTERNAL_H
#define POLDIFF_RBAC_INTERNAL_H
#ifdef __cplusplus
extern "C"
{
#endif
typedef struct poldiff_role_allow_summary poldiff_role_allow_summary_t;
typedef struct poldiff_role_trans_summary poldiff_role_trans_summary_t;
/**
* Allocate and return a new poldiff_role_allow_summary_t object.
*
* @return A new role allow summary. The caller must call role_allow_destroy()
* afterwards. On error, return NULL and set errno.
*/
poldiff_role_allow_summary_t *role_allow_create(void);
/**
* Deallocate all space associated with a poldiff_role_allow_summary_t
* object, including the pointer itself. If the pointer is already
* NULL then do nothing.
*
* @param ras Reference to a role allow summary to destroy. The pointer
* will be set to NULL afterwards.
*/
void role_allow_destroy(poldiff_role_allow_summary_t ** ras);
/**
* Reset the state of all role allow rule differences.
* @param diff The policy difference structure containing the differences
* to reset.
* @return 0 on success and < 0 on error; if the call fails,
* errno will be set and the user should call poldiff_destroy() on diff.
*/
int role_allow_reset(poldiff_t * diff);
/**
* Get a vector of all role allow rules from the given policy,
* sorted by source name.
*
* @param diff Policy diff error handler.
* @param policy The policy from which to get the items.
*
* @return A newly allocated vector of all role allow rules (of type
* pseudo_role_allow_t). The caller is responsible for calling
* apol_vector_destroy() afterwards. On error, return NULL and set
* errno.
*/
apol_vector_t *role_allow_get_items(poldiff_t * diff, const apol_policy_t * policy);
/**
* Compare two pseudo_role_allow_t objects, determining if they have the same
* source name or not.
*
* @param x The role allow from the original policy.
* @param y The role allow from the modified policy.
* @param diff The policy difference structure associated with both
* policies.
*
* @return < 0, 0, or > 0 if source role of x is respectively less than, equal
* to, or greater than source role of y.
*/
int role_allow_comp(const void *x, const void *y, const poldiff_t * diff);
/**
* Create, initialize, and insert a new semantic difference entry for
* a role allow rule.
*
* @param diff The policy difference structure to which to add the entry.
* @param form The form of the difference.
* @param item Item for which the entry is being created.
*
* @return 0 on success and < 0 on error; if the call fails, set errno
* and leave the policy difference structure unchanged.
*/
int role_allow_new_diff(poldiff_t * diff, poldiff_form_e form, const void *item);
/**
* Compute the semantic difference of two role allow rules for which the
* compare callback returns 0. If a difference is found then allocate,
* initialize, and insert a new semantic difference entry for that role allow
* rule.
*
* @param diff The policy difference structure associated with both
* rules and to which to add an entry if needed.
* @param x The role allow rule from the original policy.
* @param y The role allow rule from the modified policy.
*
* @return 0 on success and < 0 on error; if the call fails, set errno
* and leave the policy difference structure unchanged.
*/
int role_allow_deep_diff(poldiff_t * diff, const void *x, const void *y);
/**
* Allocate and return a new poldiff_role_trans_summary_t object.
*
* @return A new role transition summary. The caller must call
* role_trans_destroy() afterwards. On error, return NULL and set errno.
*/
poldiff_role_trans_summary_t *role_trans_create(void);
/**
* Deallocate all space associated with a poldiff_role_trans_summary_t
* object, including the pointer itself. If the pointer is already
* NULL then do nothing.
*
* @param rts Reference to a role transition summary to destroy. The pointer
* will be set to NULL afterwards.
*/
void role_trans_destroy(poldiff_role_trans_summary_t ** rts);
/**
* Reset the state of all role_transition rule differences.
* @param diff The policy difference structure containing the differences
* to reset.
* @return 0 on success and < 0 on error; if the call fails,
* errno will be set and the user should call poldiff_destroy() on diff.
*/
int role_trans_reset(poldiff_t * diff);
/**
* Get a vector of all role_transition rules from the given policy,
* sorted by source name.
*
* @param diff Policy diff error handler.
* @param policy The policy from which to get the items.
*
* @return A newly allocated vector of all role_transition rules (of
* type pseudo_role_trans_t). The caller is responsible for calling
* apol_vector_destroy() afterwards. On error, return NULL and set
* errno.
*/
apol_vector_t *role_trans_get_items(poldiff_t * diff, const apol_policy_t * policy);
/**
* Compare two pseudo_role_trans_t objects, determining if they have the same
* source name and target or not.
*
* @param x The role_transition from the original policy.
* @param y The role_transition from the modified policy.
* @param diff The policy difference structure associated with both
* policies.
*
* @return < 0, 0, or > 0 if source role of x is respectively less than, equal
* to, or greater than source role of y.
*/
int role_trans_comp(const void *x, const void *y, const poldiff_t * diff);
/**
* Create, initialize, and insert a new semantic difference entry for
* a role_transition rule.
*
* @param diff The policy difference structure to which to add the entry.
* @param form The form of the difference.
* @param item Item for which the entry is being created.
*
* @return 0 on success and < 0 on error; if the call fails, set errno
* and leave the policy difference structure unchanged.
*/
int role_trans_new_diff(poldiff_t * diff, poldiff_form_e form, const void *item);
/**
* Compute the semantic difference of two role_transition rules for which the
* compare callback returns 0. If a difference is found then allocate,
* initialize, and insert a new semantic difference entry for that
* role_transition rule.
*
* @param diff The policy difference structure associated with both
* rules and to which to add an entry if needed.
* @param x The role_transition rule from the original policy.
* @param y The role_transition rule from the modified policy.
*
* @return 0 on success and < 0 on error; if the call fails, set errno
* and leave the policy difference structure unchanged.
*/
int role_trans_deep_diff(poldiff_t * diff, const void *x, const void *y);
#ifdef __cplusplus
}
#endif
#endif /* POLDIFF_RBAC_INTERNAL_H */
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