/*
 * ejabberd external authentication program
 *
 * (c) Alexander Vdolainen 2013, 2018, 2019, 2021 <alex@vapaa.xyz>
 *
 * this 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 2 of the License, or
 * (at your option) any later version.
 *
 * this 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/>.";
 *
 */

#ifndef __EJABBERDMSG_H__
#define __EJABBERDMSG_H__

/*
 * in order to avoid extensive strncmps
 * that's a way faster to precalculate
 * djb hash for each action.
 * according to documentation there are the few ones:
 *  = auth:user:server:password (authentication itself)
 *  = isuser:user:server (check is user exist)
 *  = setpass:user:server:password (set new password)
 *  = tryregister:user:server:password (try to register a new account)
 *  = removeuser:user:server (remove user's account)
 *  = removeuser3:user:server:password (the same as above, but works with
 *    right password only)
 */
#define AUTH_HASH         0x000000017C944157
#define ISUSER_HASH       0x00000653052FCFC0
#define SETPASS_HASH      0x0000D0B68C342068
#define TRYREGISTER_HASH  0xC0D7C0FAC0ED2809
#define REMOVEUSER_HASH   0x7272BF5C0AA994F2
#define REMOVEUSER3_HASH  0xC0CAAADD5FDC3365

/* type used for ejabberd action */
typedef enum {
  EJA_AUTH = 1,
  EJA_ISUSER = 2,
  EJA_SETPASS = 3,
  EJA_TRYREGISTER = 4,
  EJA_REMOVEUSER = 5,
  EJA_REMOVEUSER3 = 6,
  EJA_UNKNOWN = 7,
} ejabber_action_t;

/* limits for allocation */
#define MAX_USER_LEN  256
#define MAX_DOMAIN_LEN  128
#define MAX_PASSWORD_LEN  128

struct ejabber_msg {
  ejabber_action_t aev; /* message action */
  char *msg_data; /* all data from the message */
  char *user; /* pointer to the user part */
  char *domain; /* pointer to the domain/server part of the message */
  char *password; /* pointer to the password part of the message */
};

/* little helpers to avoid structure's names hunting */
#define ejabber_msg_event(c)  (c)->aev
#define ejabber_msg_data(c)  (c)->msg_data
#define ejabber_msg_user(c)  (c)->user
#define ejabber_msg_domain(c)  (c)->domain
#define ejabber_msg_password(c)  (c)->password

#endif /* __EJABBERDMSG_H__ */