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/**
* This file is part of Hercules.
* http://herc.ws - http://github.com/HerculesWS/Hercules
*
* Copyright (C) 2012-2015 Hercules Dev Team
* Copyright (C) Athena Dev Teams
*
* Hercules 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/>.
*/
#define HERCULES_CORE
#include "ipban.h"
#include "login/login.h"
#include "login/loginlog.h"
#include "common/cbasetypes.h"
#include "common/nullpo.h"
#include "common/sql.h"
#include "common/strlib.h"
#include "common/timer.h"
#include <stdlib.h>
// global sql settings
static char global_db_hostname[32] = "127.0.0.1";
static uint16 global_db_port = 3306;
static char global_db_username[32] = "ragnarok";
static char global_db_password[100] = "ragnarok";
static char global_db_database[32] = "ragnarok";
static char global_codepage[32] = "";
// local sql settings
static char ipban_db_hostname[32] = "";
static uint16 ipban_db_port = 0;
static char ipban_db_username[32] = "";
static char ipban_db_password[100] = "";
static char ipban_db_database[32] = "";
static char ipban_codepage[32] = "";
static char ipban_table[32] = "ipbanlist";
// globals
static Sql* sql_handle = NULL;
static int cleanup_timer_id = INVALID_TIMER;
static bool ipban_inited = false;
int ipban_cleanup(int tid, int64 tick, int id, intptr_t data);
// initialize
void ipban_init(void)
{
const char* username;
const char* password;
const char* hostname;
uint16 port;
const char* database;
const char* codepage;
ipban_inited = true;
if( !login_config.ipban )
return;// ipban disabled
if( ipban_db_hostname[0] != '\0' )
{// local settings
username = ipban_db_username;
password = ipban_db_password;
hostname = ipban_db_hostname;
port = ipban_db_port;
database = ipban_db_database;
codepage = ipban_codepage;
}
else
{// global settings
username = global_db_username;
password = global_db_password;
hostname = global_db_hostname;
port = global_db_port;
database = global_db_database;
codepage = global_codepage;
}
// establish connections
sql_handle = SQL->Malloc();
if( SQL_ERROR == SQL->Connect(sql_handle, username, password, hostname, port, database) )
{
Sql_ShowDebug(sql_handle);
SQL->Free(sql_handle);
exit(EXIT_FAILURE);
}
if( codepage[0] != '\0' && SQL_ERROR == SQL->SetEncoding(sql_handle, codepage) )
Sql_ShowDebug(sql_handle);
if( login_config.ipban_cleanup_interval > 0 )
{ // set up periodic cleanup of connection history and active bans
timer->add_func_list(ipban_cleanup, "ipban_cleanup");
cleanup_timer_id = timer->add_interval(timer->gettick()+10, ipban_cleanup, 0, 0, login_config.ipban_cleanup_interval*1000);
} else // make sure it gets cleaned up on login-server start regardless of interval-based cleanups
ipban_cleanup(0,0,0,0);
}
// finalize
void ipban_final(void)
{
if( !login_config.ipban )
return;// ipban disabled
if( login_config.ipban_cleanup_interval > 0 )
// release data
timer->delete(cleanup_timer_id, ipban_cleanup);
ipban_cleanup(0,0,0,0); // always clean up on login-server stop
// close connections
SQL->Free(sql_handle);
sql_handle = NULL;
}
// load configuration options
bool ipban_config_read(const char* key, const char* value)
{
const char* signature;
nullpo_ret(key);
nullpo_ret(value);
if( ipban_inited )
return false;// settings can only be changed before init
signature = "sql.";
if( strncmpi(key, signature, strlen(signature)) == 0 )
{
key += strlen(signature);
if( strcmpi(key, "db_hostname") == 0 )
safestrncpy(global_db_hostname, value, sizeof(global_db_hostname));
else
if( strcmpi(key, "db_port") == 0 )
global_db_port = (uint16)strtoul(value, NULL, 10);
else
if( strcmpi(key, "db_username") == 0 )
safestrncpy(global_db_username, value, sizeof(global_db_username));
else
if( strcmpi(key, "db_password") == 0 )
safestrncpy(global_db_password, value, sizeof(global_db_password));
else
if( strcmpi(key, "db_database") == 0 )
safestrncpy(global_db_database, value, sizeof(global_db_database));
else
if( strcmpi(key, "codepage") == 0 )
safestrncpy(global_codepage, value, sizeof(global_codepage));
else
return false;// not found
return true;
}
signature = "ipban.sql.";
if( strncmpi(key, signature, strlen(signature)) == 0 )
{
key += strlen(signature);
if( strcmpi(key, "db_hostname") == 0 )
safestrncpy(ipban_db_hostname, value, sizeof(ipban_db_hostname));
else
if( strcmpi(key, "db_port") == 0 )
ipban_db_port = (uint16)strtoul(value, NULL, 10);
else
if( strcmpi(key, "db_username") == 0 )
safestrncpy(ipban_db_username, value, sizeof(ipban_db_username));
else
if( strcmpi(key, "db_password") == 0 )
safestrncpy(ipban_db_password, value, sizeof(ipban_db_password));
else
if( strcmpi(key, "db_database") == 0 )
safestrncpy(ipban_db_database, value, sizeof(ipban_db_database));
else
if( strcmpi(key, "codepage") == 0 )
safestrncpy(ipban_codepage, value, sizeof(ipban_codepage));
else
if( strcmpi(key, "ipban_table") == 0 )
safestrncpy(ipban_table, value, sizeof(ipban_table));
else
return false;// not found
return true;
}
signature = "ipban.";
if( strncmpi(key, signature, strlen(signature)) == 0 )
{
key += strlen(signature);
if( strcmpi(key, "enable") == 0 )
login_config.ipban = (bool)config_switch(value);
else
if( strcmpi(key, "dynamic_pass_failure_ban") == 0 )
login_config.dynamic_pass_failure_ban = (bool)config_switch(value);
else
if( strcmpi(key, "dynamic_pass_failure_ban_interval") == 0 )
login_config.dynamic_pass_failure_ban_interval = atoi(value);
else
if( strcmpi(key, "dynamic_pass_failure_ban_limit") == 0 )
login_config.dynamic_pass_failure_ban_limit = atoi(value);
else
if( strcmpi(key, "dynamic_pass_failure_ban_duration") == 0 )
login_config.dynamic_pass_failure_ban_duration = atoi(value);
else
return false;// not found
return true;
}
return false;// not found
}
// check ip against active bans list
bool ipban_check(uint32 ip)
{
uint8* p = (uint8*)&ip;
char* data = NULL;
int matches;
if( !login_config.ipban )
return false;// ipban disabled
if( SQL_ERROR == SQL->Query(sql_handle, "SELECT count(*) FROM `%s` WHERE `rtime` > NOW() AND (`list` = '%u.*.*.*' OR `list` = '%u.%u.*.*' OR `list` = '%u.%u.%u.*' OR `list` = '%u.%u.%u.%u')",
ipban_table, p[3], p[3], p[2], p[3], p[2], p[1], p[3], p[2], p[1], p[0]) )
{
Sql_ShowDebug(sql_handle);
// close connection because we can't verify their connectivity.
return true;
}
if( SQL_SUCCESS != SQL->NextRow(sql_handle) )
return false;
SQL->GetData(sql_handle, 0, &data, NULL);
matches = atoi(data);
SQL->FreeResult(sql_handle);
return( matches > 0 );
}
// log failed attempt
void ipban_log(uint32 ip)
{
unsigned long failures;
if( !login_config.ipban )
return;// ipban disabled
failures = loginlog_failedattempts(ip, login_config.dynamic_pass_failure_ban_interval);// how many times failed account? in one ip.
// if over the limit, add a temporary ban entry
if( failures >= login_config.dynamic_pass_failure_ban_limit )
{
uint8* p = (uint8*)&ip;
if (SQL_ERROR == SQL->Query(sql_handle, "INSERT INTO `%s`(`list`,`btime`,`rtime`,`reason`) VALUES ('%u.%u.%u.*', NOW() , NOW() + INTERVAL %d MINUTE ,'Password error ban')",
ipban_table, p[3], p[2], p[1], login_config.dynamic_pass_failure_ban_duration))
{
Sql_ShowDebug(sql_handle);
}
}
}
// remove expired bans
int ipban_cleanup(int tid, int64 tick, int id, intptr_t data) {
if( !login_config.ipban )
return 0;// ipban disabled
if( SQL_ERROR == SQL->Query(sql_handle, "DELETE FROM `%s` WHERE `rtime` <= NOW()", ipban_table) )
Sql_ShowDebug(sql_handle);
return 0;
}
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