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netuser.c

/* netuser.c - LOGIN/LOGOUT/USERNAME/PASSWORD/MASTER handlers for upsd

   Copyright (C) 2003  Russell Kroll <rkroll@exploits.org>

   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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

#include "common.h"

#include "upsd.h"
#include "sstate.h"
#include "state.h"
#include "neterr.h"
#include "user.h"       /* for user_checkaction */

#include "netuser.h"

/* LOGIN <ups> */
void net_login(ctype *client, int numarg, const char **arg)
{
      upstype     *ups;

      if (numarg != 1) {
            send_err(client, NUT_ERR_INVALID_ARGUMENT);
            return;
      }

      if (client->loginups != NULL) {

            if (client->username)
                  upslogx(LOG_INFO, "Client %s@%s tried to login twice",
                        client->username, client->addr);
            else
                  upslogx(LOG_INFO, "Client on %s tried to login twice",
                        client->addr);

            send_err(client, NUT_ERR_ALREADY_LOGGED_IN);
            return;
      }

      /* make sure we got a valid UPS name */
      ups = get_ups_ptr(arg[0]);

      if (!ups) {
            send_err(client, NUT_ERR_UNKNOWN_UPS);
            return;
      }

      ups->numlogins++;
      client->loginups = xstrdup(ups->name);

      upslogx(LOG_INFO, "Client %s@%s logged into UPS [%s]%s",
            client->username, client->addr, client->loginups,
            client->ssl ? " (SSL)" : "");

      sendback(client, "OK\n");
}

void net_logout(ctype *client, int numarg, const char **arg)
{
      if (numarg != 0) {
            send_err(client, NUT_ERR_INVALID_ARGUMENT);
            return;
      }

      if (client->username)
            upslogx(LOG_INFO, "Client %s@%s logged out",
                  client->username, client->addr);
      else
            upslogx(LOG_INFO, "Client on %s logged out", client->addr);

      sendback(client, "OK Goodbye\n");
      client->delete = 1;
}

/* MASTER <upsname> */
void net_master(ctype *client, int numarg, const char **arg)
{
      upstype     *ups;

      if (numarg != 1) {
            send_err(client, NUT_ERR_INVALID_ARGUMENT);
            return;
      }
      
      ups = get_ups_ptr(arg[0]);

      if (!ups) {
            send_err(client, NUT_ERR_UNKNOWN_UPS);
            return;
      }

      /* make sure this user is allowed to do MASTER */
      if (!user_checkaction(&client->sock, client->username,
            client->password, "MASTER")) {

            send_err(client, NUT_ERR_ACCESS_DENIED);
            return;
      }           

      /* this is just an access level check */
      sendback(client, "OK MASTER-GRANTED\n");
}

/* USERNAME <username> */
void net_username(ctype *client, int numarg, const char **arg)
{
      if (numarg != 1) {
            send_err(client, NUT_ERR_INVALID_ARGUMENT);
            return;
      }
      
      if (client->username != NULL) {
            upslogx(LOG_INFO, "Client %s@%s tried to set a username twice",
                  client->username, client->addr);

            send_err(client, NUT_ERR_ALREADY_SET_USERNAME);
            return;
      }

      client->username = xstrdup(arg[0]);
      sendback(client, "OK\n");
}

/* PASSWORD <password> */
void net_password(ctype *client, int numarg, const char **arg)
{
      if (numarg != 1) {
            send_err(client, NUT_ERR_INVALID_ARGUMENT);
            return;
      }

      if (client->password != NULL) {
            if (client->username)
                  upslogx(LOG_INFO, "Client %s@%s tried to set a password twice",
                        client->username, client->addr);
            else
                  upslogx(LOG_INFO, "Client on %s tried to set a password twice",
                        client->addr);

            send_err(client, NUT_ERR_ALREADY_SET_PASSWORD);
            return;
      }

      client->password = xstrdup(arg[0]);
      sendback(client, "OK\n");
}

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