/*
    Copyright (C) 2012 Red Hat

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

    Authors:
        Simo Sorce <ssorce@redhat.com>
*/

#ifndef __SSSD_UTIL_ERRORS_H__
#define __SSSD_UTIL_ERRORS_H__

#ifndef HAVE_ERRNO_T
#define HAVE_ERRNO_T
typedef int errno_t;
#endif

/*
 * We define a specific number space so that we do not overlap with other
 * generic errors returned by various libraries. This will make it easy
 * to have functions that double check that what was returned was a SSSD
 * specific error where it matters. For example we may want to ensure some
 * particularly sensitive paths only return SSSD sepcific errors as that
 * will insure all error conditions have been explicitly dealt with,
 * and are not the result of assigning the wrong return result.
 *
 * Basic system errno errors can still be used, but when an error condition
 * does not properly map to a system error we should use a SSSD specific one
 */

#define ERR_BASE    0x555D0000
#define ERR_MASK    0x0000FFFF

/* never use ERR_INVALID, it is used for catching and returning
 * information on invalid error numbers */
/* never use ERR_LAST, this represent the maximum error value available
 * and is used to validate error codes */
enum sssd_errors {
    ERR_INVALID = ERR_BASE + 0,
    ERR_INTERNAL,
    ERR_ACCOUNT_UNKNOWN,
    ERR_INVALID_CRED_TYPE,
    ERR_NO_CREDS,
    ERR_CREDS_EXPIRED,
    ERR_NO_CACHED_CREDS,
    ERR_CACHED_CREDS_EXPIRED,
    ERR_AUTH_DENIED,
    ERR_AUTH_FAILED,
    ERR_CHPASS_DENIED,
    ERR_CHPASS_FAILED,
    ERR_NETWORK_IO,
    ERR_ACCOUNT_EXPIRED,
    ERR_PASSWORD_EXPIRED,
    ERR_ACCESS_DENIED,
    ERR_LAST            /* ALWAYS LAST */
};

#define SSSD_ERR_BASE(err) ((err) & ~ERR_MASK)
#define SSSD_ERR_IDX(err) ((err) & ERR_MASK)
#define IS_SSSD_ERROR(err) \
    ((SSSD_ERR_BASE(err) == ERR_BASE) && ((err) < ERR_LAST))

#define ERR_OK      0
/* Backwards compat */
#ifndef EOK
#define EOK ERR_OK
#endif

/**
 * @brief return a string descriing the error number like strerror()
 *
 * @param error     An errno_t number, can be a SSSD error or a system error
 *
 * @return A statically allocated string.
 */
const char *sss_strerror(errno_t error);

#endif /* __SSSD_UTIL_ERRORS_H__ */