summaryrefslogtreecommitdiff
path: root/src/login/login.c
blob: c2faa661322785c7e8b05ac7eba1cf3195efa45f (plain) (blame)
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
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder

#include "../common/core.h"
#include "../common/db.h"
#include "../common/malloc.h"
#include "../common/md5calc.h"
#include "../common/showmsg.h"
#include "../common/socket.h"
#include "../common/strlib.h"
#include "../common/timer.h"
#include "../common/version.h"
#include "login.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


// temporary external imports
extern struct gm_account* gm_account_db;
int read_gm_account(void);
int mmo_auth_init(void);
int parse_login(int fd);

#ifdef TXT_ONLY
	extern struct mmo_account* auth_dat;
	void mmo_auth_sync(void);
	int check_GM_file(int tid, unsigned int tick, int id, int data);
	int check_auth_sync(int tid, unsigned int tick, int id, int data);
	void display_conf_warnings(void);
	extern bool admin_state;
	extern char admin_pass[24];
	extern uint32 admin_allowed_ip;
	extern char account_txt[1024];
	extern char GM_account_filename[1024];
	extern int gm_account_filename_check_timer;
#else
	void mmo_db_close(void);
	void sql_config_read(const char* cfgName);
	int ip_ban_flush(int tid, unsigned int tick, int id, int data);
#endif


struct Login_Config login_config;

int login_fd; // login server socket
#define MAX_SERVERS 30
struct mmo_char_server server[MAX_SERVERS]; // char server data

#define sex_num2str(num) ( (num ==  0  ) ? 'F' : (num ==  1  ) ? 'M' : 'S' )
#define sex_str2num(str) ( (str == 'F' ) ?  0  : (str == 'M' ) ?  1  :  2  )


//Account registration flood protection [Kevin]
int allowed_regs = 1;
int time_allowed = 10; //in seconds

// Advanced subnet check [LuzZza]
struct s_subnet {
	uint32 mask;
	uint32 char_ip;
	uint32 map_ip;
} subnet[16];

int subnet_count = 0;


//-----------------------------------------------------
// Auth database
//-----------------------------------------------------
#define AUTH_TIMEOUT 30000

/*static*/ DBMap* auth_db; // int account_id -> struct auth_node*

//-----------------------------------------------------
// Online User Database [Wizputer]
//-----------------------------------------------------

/*static*/ DBMap* online_db; // int account_id -> struct online_login_data*
/*static*/ int waiting_disconnect_timer(int tid, unsigned int tick, int id, int data);

/*static*/ void* create_online_user(DBKey key, va_list args)
{
	struct online_login_data* p;
	CREATE(p, struct online_login_data, 1);
	p->account_id = key.i;
	p->char_server = -1;
	p->waiting_disconnect = -1;
	return p;
}

struct online_login_data* add_online_user(int char_server, int account_id)
{
	struct online_login_data* p;
	if( !login_config.online_check )
		return NULL;
	p = (struct online_login_data*)idb_ensure(online_db, account_id, create_online_user);
	p->char_server = char_server;
	if( p->waiting_disconnect != -1 )
	{
		delete_timer(p->waiting_disconnect, waiting_disconnect_timer);
		p->waiting_disconnect = -1;
	}
	return p;
}

void remove_online_user(int account_id)
{
	struct online_login_data* p;
	if( !login_config.online_check )
		return;
	p = (struct online_login_data*)idb_get(online_db, account_id);
	if( p == NULL )
		return;
	if( p->waiting_disconnect != -1 )
		delete_timer(p->waiting_disconnect, waiting_disconnect_timer);

	idb_remove(online_db, account_id);
}

/*static*/ int waiting_disconnect_timer(int tid, unsigned int tick, int id, int data)
{
	struct online_login_data* p = (struct online_login_data*)idb_get(online_db, id);
	if( p != NULL && p->waiting_disconnect == tid && p->account_id == id )
	{
		p->waiting_disconnect = -1;
		remove_online_user(id);
		idb_remove(auth_db, id);
	}
	return 0;
}

/*static*/ int online_db_setoffline(DBKey key, void* data, va_list ap)
{
	struct online_login_data* p = (struct online_login_data*)data;
	int server = va_arg(ap, int);
	if( server == -1 )
	{
		p->char_server = -1;
		if( p->waiting_disconnect != -1 )
		{
			delete_timer(p->waiting_disconnect, waiting_disconnect_timer);
			p->waiting_disconnect = -1;
		}
	}
	else if( p->char_server == server )
		p->char_server = -2; //Char server disconnected.
	return 0;
}

static int online_data_cleanup_sub(DBKey key, void *data, va_list ap)
{
	struct online_login_data *character= (struct online_login_data*)data;
	if (character->char_server == -2) //Unknown server.. set them offline
		remove_online_user(character->account_id);
	return 0;
}

static int online_data_cleanup(int tid, unsigned int tick, int id, int data)
{
	online_db->foreach(online_db, online_data_cleanup_sub);
	return 0;
} 


//--------------------------------------------------------------------
// Packet send to all char-servers, except one (wos: without our self)
//--------------------------------------------------------------------
int charif_sendallwos(int sfd, uint8* buf, size_t len)
{
	int i, c;

	for( i = 0, c = 0; i < MAX_SERVERS; ++i )
	{
		int fd = server[i].fd;
		if( session_isValid(fd) && fd != sfd )
		{
			WFIFOHEAD(fd,len);
			memcpy(WFIFOP(fd,0), buf, len);
			WFIFOSET(fd,len);
			++c;
		}
	}

	return c;
}


//-----------------------------------------------------
// periodic ip address synchronization
//-----------------------------------------------------
static int sync_ip_addresses(int tid, unsigned int tick, int id, int data)
{
	uint8 buf[2];
	ShowInfo("IP Sync in progress...\n");
	WBUFW(buf,0) = 0x2735;
	charif_sendallwos(-1, buf, 2);
	return 0;
}


//-----------------------------------------------------
// encrypted/unencrypted password check
//-----------------------------------------------------
bool check_encrypted(const char* str1, const char* str2, const char* passwd)
{
	char md5str[64], md5bin[32];

	snprintf(md5str, sizeof(md5str), "%s%s", str1, str2);
	md5str[sizeof(md5str)-1] = '\0';
	MD5_String2binary(md5str, md5bin);

	return (0==memcmp(passwd, md5bin, 16));
}

bool check_password(struct login_session_data* sd, int passwdenc, const char* passwd, const char* refpass)
{	
	if(passwdenc == 0)
	{
		return (0==strcmp(passwd, refpass));
	}
	else if(sd != NULL)
	{
		// password mode set to 1 -> (md5key, refpass) enable with <passwordencrypt></passwordencrypt>
		// password mode set to 2 -> (refpass, md5key) enable with <passwordencrypt2></passwordencrypt2>
		
		return ((passwdenc&0x01) && check_encrypted(sd->md5key, refpass, passwd)) ||
		       ((passwdenc&0x02) && check_encrypted(refpass, sd->md5key, passwd));
	}
	return false;
}


//--------------------------------------------
// Test to know if an IP come from LAN or WAN.
//--------------------------------------------
int lan_subnetcheck(uint32 ip)
{
	int i;
	ARR_FIND( 0, subnet_count, i, (subnet[i].char_ip & subnet[i].mask) == (ip & subnet[i].mask) );
	return ( i < subnet_count ) ? subnet[i].char_ip : 0;
}

//----------------------------------
// Reading Lan Support configuration
//----------------------------------
int login_lan_config_read(const char *lancfgName)
{
	FILE *fp;
	int line_num = 0;
	char line[1024], w1[64], w2[64], w3[64], w4[64];

	if((fp = fopen(lancfgName, "r")) == NULL) {
		ShowWarning("LAN Support configuration file is not found: %s\n", lancfgName);
		return 1;
	}

	ShowInfo("Reading the configuration file %s...\n", lancfgName);

	while(fgets(line, sizeof(line), fp))
	{
		line_num++;
		if ((line[0] == '/' && line[1] == '/') || line[0] == '\n' || line[1] == '\n')
			continue;

		if(sscanf(line,"%[^:]: %[^:]:%[^:]:%[^\r\n]", w1, w2, w3, w4) != 4)
		{
			ShowWarning("Error syntax of configuration file %s in line %d.\n", lancfgName, line_num);
			continue;
		}

		if( strcmpi(w1, "subnet") == 0 )
		{
			subnet[subnet_count].mask = str2ip(w2);
			subnet[subnet_count].char_ip = str2ip(w3);
			subnet[subnet_count].map_ip = str2ip(w4);

			if( (subnet[subnet_count].char_ip & subnet[subnet_count].mask) != (subnet[subnet_count].map_ip & subnet[subnet_count].mask) )
			{
				ShowError("%s: Configuration Error: The char server (%s) and map server (%s) belong to different subnetworks!\n", lancfgName, w3, w4);
				continue;
			}

			subnet_count++;
		}
	}

	ShowStatus("Read information about %d subnetworks.\n", subnet_count);

	fclose(fp);
	return 0;
}


//-----------------------
// Console Command Parser [Wizputer]
//-----------------------
int parse_console(char* buf)
{
	char command[256];

	memset(command, 0, sizeof(command));

	sscanf(buf, "%[^\n]", command);

	ShowInfo("Console command :%s", command);

	if( strcmpi("shutdown", command) == 0 ||
	    strcmpi("exit", command) == 0 ||
	    strcmpi("quit", command) == 0 ||
	    strcmpi("end", command) == 0 )
		runflag = 0;
	else
	if( strcmpi("alive", command) == 0 ||
	    strcmpi("status", command) == 0 )
		ShowInfo(CL_CYAN"Console: "CL_BOLD"I'm Alive."CL_RESET"\n");
	else
	if( strcmpi("help", command) == 0 ) {
		ShowInfo(CL_BOLD"Help of commands:"CL_RESET"\n");
		ShowInfo("  To shutdown the server:\n");
		ShowInfo("  'shutdown|exit|quit|end'\n");
		ShowInfo("  To know if server is alive:\n");
		ShowInfo("  'alive|status'\n");
	}

	return 0;
}


void login_set_defaults()
{
	login_config.login_ip = INADDR_ANY;
	login_config.login_port = 6900;
	login_config.ip_sync_interval = 0;
	login_config.log_login = true;
	safestrncpy(login_config.date_format, "%Y-%m-%d %H:%M:%S", sizeof(login_config.date_format));
	login_config.console = false;
	login_config.new_account_flag = true;
	login_config.case_sensitive = true;
	login_config.use_md5_passwds = false;
	login_config.login_gm_read = true;
	login_config.min_level_to_connect = 0;
	login_config.online_check = true;
	login_config.check_client_version = false;
	login_config.client_version_to_connect = 20;

	login_config.ipban = true;
	login_config.dynamic_pass_failure_ban = true;
	login_config.dynamic_pass_failure_ban_interval = 5;
	login_config.dynamic_pass_failure_ban_limit = 7;
	login_config.dynamic_pass_failure_ban_duration = 5;
	login_config.use_dnsbl = false;
	safestrncpy(login_config.dnsbl_servs, "", sizeof(login_config.dnsbl_servs));
}

//-----------------------------------
// Reading main configuration file
//-----------------------------------
int login_config_read(const char* cfgName)
{
	char line[1024], w1[1024], w2[1024];
	FILE* fp = fopen(cfgName, "r");
	if (fp == NULL) {
		ShowError("Configuration file (%s) not found.\n", cfgName);
		return 1;
	}
	ShowInfo("Reading configuration file %s...\n", cfgName);
	while(fgets(line, sizeof(line), fp))
	{
		if (line[0] == '/' && line[1] == '/')
			continue;

		if (sscanf(line, "%[^:]: %[^\r\n]", w1, w2) < 2)
			continue;

		if(!strcmpi(w1,"timestamp_format"))
			strncpy(timestamp_format, w2, 20);
		else if(!strcmpi(w1,"stdout_with_ansisequence"))
			stdout_with_ansisequence = config_switch(w2);
		else if(!strcmpi(w1,"console_silent")) {
			ShowInfo("Console Silent Setting: %d\n", atoi(w2));
			msg_silent = atoi(w2);
		}
		else if( !strcmpi(w1, "bind_ip") ) {
			char ip_str[16];
			login_config.login_ip = host2ip(w2);
			if( login_config.login_ip )
				ShowStatus("Login server binding IP address : %s -> %s\n", w2, ip2str(login_config.login_ip, ip_str));
		}
		else if( !strcmpi(w1, "login_port") ) {
			login_config.login_port = (uint16)atoi(w2);
			ShowStatus("set login_port : %s\n",w2);
		}
		else if(!strcmpi(w1, "log_login"))
			login_config.log_login = (bool)config_switch(w2);

#ifdef TXT_ONLY
		else if(!strcmpi(w1, "admin_state") == 0)
			admin_state = (bool)config_switch(w2);
		else if(!strcmpi(w1, "admin_pass") == 0)
			safestrncpy(admin_pass, w2, sizeof(admin_pass));
		else if(!strcmpi(w1, "admin_allowed_ip") == 0)
			admin_allowed_ip = host2ip(w2);
		else if(!strcmpi(w1, "account_txt") == 0)
			safestrncpy(account_txt, w2, sizeof(account_txt));
		else if(!strcmpi(w1, "gm_account_filename") == 0)
			safestrncpy(GM_account_filename, w2, sizeof(GM_account_filename));
		else if(!strcmpi(w1, "gm_account_filename_check_timer") == 0)
			gm_account_filename_check_timer = atoi(w2);
#else
		else if(!strcmpi(w1, "ipban"))
			login_config.ipban = (bool)config_switch(w2);
		else if(!strcmpi(w1, "dynamic_pass_failure_ban"))
			login_config.dynamic_pass_failure_ban = (bool)config_switch(w2);
		else if(!strcmpi(w1, "dynamic_pass_failure_ban_interval"))
			login_config.dynamic_pass_failure_ban_interval = atoi(w2);
		else if(!strcmpi(w1, "dynamic_pass_failure_ban_limit"))
			login_config.dynamic_pass_failure_ban_limit = atoi(w2);
		else if(!strcmpi(w1, "dynamic_pass_failure_ban_duration"))
			login_config.dynamic_pass_failure_ban_duration = atoi(w2);
#endif

		else if(!strcmpi(w1, "new_account"))
			login_config.new_account_flag = (bool)config_switch(w2);
		else if(!strcmpi(w1, "start_limited_time"))
			login_config.start_limited_time = atoi(w2);
		else if(!strcmpi(w1, "check_client_version"))
			login_config.check_client_version = (bool)config_switch(w2);
		else if(!strcmpi(w1, "client_version_to_connect"))
			login_config.client_version_to_connect = atoi(w2);
		else if(!strcmpi(w1, "use_MD5_passwords"))
			login_config.use_md5_passwds = (bool)config_switch(w2);
		else if(!strcmpi(w1, "min_level_to_connect"))
			login_config.min_level_to_connect = atoi(w2);
		else if(!strcmpi(w1, "date_format"))
			safestrncpy(login_config.date_format, w2, sizeof(login_config.date_format));
		else if(!strcmpi(w1, "console"))
			login_config.console = (bool)config_switch(w2);
		else if(!strcmpi(w1, "case_sensitive"))
			login_config.case_sensitive = config_switch(w2);
		else if(!strcmpi(w1, "allowed_regs")) //account flood protection system
			allowed_regs = atoi(w2);
		else if(!strcmpi(w1, "time_allowed"))
			time_allowed = atoi(w2);
		else if(!strcmpi(w1, "online_check"))
			login_config.online_check = (bool)config_switch(w2);
		else if(!strcmpi(w1, "use_dnsbl"))
			login_config.use_dnsbl = (bool)config_switch(w2);
		else if(!strcmpi(w1, "dnsbl_servers"))
			safestrncpy(login_config.dnsbl_servs, w2, sizeof(login_config.dnsbl_servs));
		else if(!strcmpi(w1, "ip_sync_interval"))
			login_config.ip_sync_interval = (unsigned int)1000*60*atoi(w2); //w2 comes in minutes.
		else if(!strcmpi(w1, "import"))
			login_config_read(w2);
	}
	fclose(fp);
	ShowInfo("Finished reading %s.\n", cfgName);
	return 0;
}


//--------------------------------------
// Function called at exit of the server
//--------------------------------------
void do_final(void)
{
	int i, fd;
	ShowStatus("Terminating...\n");

#ifdef TXT_ONLY
	mmo_auth_sync();
#else
	mmo_db_close();
#endif
	online_db->destroy(online_db, NULL);
	auth_db->destroy(auth_db, NULL);

#ifdef TXT_ONLY
	if(auth_dat) aFree(auth_dat);
#endif
	if(gm_account_db) aFree(gm_account_db);

	for (i = 0; i < MAX_SERVERS; i++) {
		if ((fd = server[i].fd) >= 0) {
			memset(&server[i], 0, sizeof(struct mmo_char_server));
			server[i].fd = -1;
			do_close(fd);
		}
	}
	do_close(login_fd);

	ShowStatus("Finished.\n");
}

//------------------------------
// Function called when the server
// has received a crash signal.
//------------------------------
void do_abort(void)
{
}

void set_server_type(void)
{
	SERVER_TYPE = ATHENA_SERVER_LOGIN;
}

//------------------------------
// Login server initialization
//------------------------------
int do_init(int argc, char** argv)
{
	int i;

	login_set_defaults();

	// read login-server configuration
	login_config_read((argc > 1) ? argv[1] : LOGIN_CONF_NAME);
#ifdef TXT_ONLY
	display_conf_warnings(); // not in login_config_read, because we can use 'import' option, and display same message twice or more
#else
	sql_config_read(INTER_CONF_NAME);
#endif
	login_lan_config_read((argc > 2) ? argv[2] : LAN_CONF_NAME);

	srand((unsigned int)time(NULL));

	for( i = 0; i < MAX_SERVERS; i++ )
		server[i].fd = -1;

	// Accounts database init
	mmo_auth_init();

	// Online user database init
	online_db = idb_alloc(DB_OPT_RELEASE_DATA);
	add_timer_func_list(waiting_disconnect_timer, "waiting_disconnect_timer");

	// Interserver auth init
	auth_db = idb_alloc(DB_OPT_RELEASE_DATA);

	// Read account information.
#ifdef TXT_ONLY
	read_gm_account();
#else
	if(login_config.login_gm_read)
		read_gm_account();
#endif

	// set default parser as parse_login function
	set_defaultparse(parse_login);

#ifdef TXT_ONLY
	// every 60 sec we check if we must save accounts file (only if necessary to save)
	add_timer_func_list(check_auth_sync, "check_auth_sync");
	add_timer_interval(gettick() + 60000, check_auth_sync, 0, 0, 60000);

	// every x sec we check if gm file has been changed
	if( gm_account_filename_check_timer ) {
		add_timer_func_list(check_GM_file, "check_GM_file");
		add_timer_interval(gettick() + gm_account_filename_check_timer * 1000, check_GM_file, 0, 0, gm_account_filename_check_timer * 1000); 
	}
#else
	// ban deleter timer
	add_timer_func_list(ip_ban_flush, "ip_ban_flush");
	add_timer_interval(gettick()+10, ip_ban_flush, 0, 0, 60*1000);
#endif

	// every 10 minutes cleanup online account db.
	add_timer_func_list(online_data_cleanup, "online_data_cleanup");
	add_timer_interval(gettick() + 600*1000, online_data_cleanup, 0, 0, 600*1000);

	// add timer to detect ip address change and perform update
	if (login_config.ip_sync_interval) {
		add_timer_func_list(sync_ip_addresses, "sync_ip_addresses");
		add_timer_interval(gettick() + login_config.ip_sync_interval, sync_ip_addresses, 0, 0, login_config.ip_sync_interval);
	}

	if( login_config.console )
	{
		//##TODO invoke a CONSOLE_START plugin event
	}

	// server port open & binding
	login_fd = make_listen_bind(login_config.login_ip, login_config.login_port);

	ShowStatus("The login-server is "CL_GREEN"ready"CL_RESET" (Server is listening on the port %u).\n\n", login_config.login_port);

	return 0;
}