1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
/**
* 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 struct 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 %u 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;
}
|
