GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: ftpserv.c Lines: 625 958 65.2 %
Date: 2026-02-24 22:34:48 Branches: 324 668 48.5 %

Line Branch Exec Source
1
/*
2
* ftpserv.c
3
*
4
*  Created on: Aug 20, 2016
5
*
6
*  Modified on: Apr 04, 2019
7
*
8
*      Author: lightftp
9
*/
10
11
#include "ftpserv.h"
12
#include "cfgparse.h"
13
#include "x_malloc.h"
14
15
static const FTPROUTINE ftpprocs[MAX_CMDS] = {
16
	ftpUSER, ftpQUIT, ftpNOOP, ftpPWD, ftpTYPE, ftpPORT, ftpLIST, ftpCDUP,
17
	ftpCWD, ftpRETR, ftpABOR, ftpDELE, ftpPASV, ftpPASS, ftpREST, ftpSIZE,
18
	ftpMKD, ftpRMD, ftpSTOR, ftpSYST, ftpFEAT, ftpAPPE, ftpRNFR, ftpRNTO,
19
	ftpOPTS, ftpMLSD, ftpAUTH, ftpPBSZ, ftpPROT, ftpEPSV, ftpHELP, ftpSITE
20
};
21
22
static const char *ftpcmds[MAX_CMDS] = {
23
	"USER", "QUIT", "NOOP", "PWD",  "TYPE", "PORT", "LIST", "CDUP",
24
	"CWD",  "RETR", "ABOR", "DELE", "PASV", "PASS", "REST", "SIZE",
25
	"MKD",  "RMD",  "STOR", "SYST", "FEAT", "APPE", "RNFR", "RNTO",
26
	"OPTS", "MLSD", "AUTH", "PBSZ", "PROT", "EPSV", "HELP", "SITE"
27
};
28
29
/*
30
 * FTP_PASSCMD_INDEX
31
 * must be in sync with ftpprocs & ftpcmds "PASS" index
32
 */
33
#define FTP_PASSCMD_INDEX	13
34
35
unsigned int g_newid = 0;
36
37
void delete_last_slash(char *s)
38
{
39

55
	if (*s != 0)
40
	{
41
		/*
42
		 * don't remove root directory sign as special case
43
		 */
44



55
		if ((s[0] == '/') && (s[1] == 0))
45
			return;
46
47

6736
		while (s[1] != 0)
48
6681
			++s;
49
50

55
		if (*s == '/')
51
55
			*s = 0;
52
	}
53
}
54
55
void add_last_slash(char *s)
56
{
57



2832
	if (*s != 0)
58
	{
59



31812
		while (s[1] != 0)
60
28980
			++s;
61
62



2832
		if (*s != '/')
63
		{
64
1449
			s[1] = '/';
65
1449
			s[2] = 0;
66
		}
67
	}
68
}
69
70
/*
71
 * Cuts off filename from string leaving only path.
72
 * Return value: pointer to a terminating null character at the end of path
73
 */
74
char *filepath(char *s)
75
{
76
	char	*p = s;
77
78

55
	if (*s == 0)
79
		return s;
80
/*
81
 * leave root directory sign untouched
82
 */
83

55
	if (*s == '/')
84
	{
85
		++s;
86
		++p;
87
	}
88
89

6736
	while (*s != 0) {
90

6681
		if (*s == '/')
91
			p = s;
92
6681
		++s;
93
	}
94
95
55
	*p = 0;
96
97
55
	return p;
98
}
99
100
/*
101
 * This function filters the path out of ".." members
102
 * not allowing user to escape the home directory
103
 */
104
1449
void format_path(char *input_path, char *filtered_path)
105
{
106
	char	*p0, *pnext, *fp0;
107
	size_t	sl;
108
109
1449
	if (*input_path == '/')
110
	{
111
1449
		++input_path;
112
1449
		*filtered_path = '/';
113
1449
		++filtered_path;
114
	}
115
116
	p0 = input_path;
117
	pnext = input_path;
118
	fp0 = filtered_path;
119
1449
	*fp0 = 0;
120
121
	while (1)
122
	{
123
51479
		while ((*pnext != '/') && (*pnext != 0))
124
28563
			++pnext;
125
126
22916
		sl = pnext - p0;
127
128
22916
		while (sl > 0)
129
		{
130
2335
			if (sl == 1)
131
770
				if (*p0 == '.')
132
					break;
133
134
2221
			if (sl == 2)
135

250
				if ((p0[0] == '.') && (p0[1] == '.'))
136
				{
137
					delete_last_slash(filtered_path);
138
					fp0 = filepath(filtered_path);
139
55
					if (fp0 != filtered_path)
140
					{
141
49
						*fp0 = '/';
142
49
						++fp0;
143
49
						*fp0 = 0;
144
					}
145
					break;
146
				}
147
148
			strncpy(fp0, p0, sl);
149
2166
			fp0 += sl;
150
2166
			if (*pnext != 0)
151
			{
152
1224
				*fp0 = '/';
153
1224
				++fp0;
154
			}
155
2166
			*fp0 = 0;
156
157
2166
			break;
158
		}
159
160
22916
		if (*pnext == 0)
161
			break;
162
163
21467
		++pnext;
164
		p0 = pnext;
165
	}
166
1449
}
167
168
1449
char *finalpath(char *root_dir, char *current_dir, char *params, char *result_path)
169
{
170
	char	*tmp, *user_root;
171
	size_t	total_len;
172
173
1449
	total_len = strlen(root_dir)+strlen(current_dir);
174
1449
	if (params != NULL)
175
990
		total_len += strlen(params);
176
177
1449
	if (total_len >= SIZE_OF_GPBUFFER)
178
		return NULL;
179
180
1449
	tmp = x_malloc(SIZE_OF_GPBUFFER);
181
182
	strcpy(result_path, root_dir);
183
	add_last_slash(result_path);
184
1449
	user_root = result_path+strlen(result_path);
185
186
	do {
187
1449
		if ( params == NULL )
188
		{
189
			strcpy(tmp, current_dir);
190
			add_last_slash(tmp);
191
			break;
192
		}
193
194
990
		if ( params[0] != '/' )
195
		{
196
			strcpy(tmp, current_dir);
197
			add_last_slash(tmp);
198
		}
199
200
		strcat(tmp, params);
201
	} while (0);
202
203
1449
	format_path(tmp, user_root);
204
1449
	free(tmp);
205
1449
	return result_path;
206
}
207
208
static void cleanup_handler(void *arg)
209
{
210
	PFTPCONTEXT context = (PFTPCONTEXT)arg;
211
212
	pthread_mutex_unlock(&context->MTLock);
213
}
214
215
ssize_t sendstring_plaintext(SOCKET s, const char *Buffer)
216
{
217
	return (send(s, Buffer, strlen(Buffer), MSG_NOSIGNAL) >= 0);
218
}
219
220
int InitTLSSession(gnutls_session_t *session, SOCKET s, int send_success_string)
221
{
222
	int ret;
223
224
	while (session != NULL)
225
	{
226
		if (gnutls_init(session, GNUTLS_SERVER | GNUTLS_NO_SIGNAL) < 0)
227
			break;
228
229
		if (gnutls_priority_set(*session, priority_cache) < 0)
230
			break;
231
232
		if (gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE, x509_cred) < 0)
233
			break;
234
235
		gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
236
		gnutls_handshake_set_timeout(*session, GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT);
237
		gnutls_transport_set_int2(*session, s, s);
238
239
		if (send_success_string != 0)
240
			sendstring_plaintext(s, success234);
241
242
		do {
243
			ret = gnutls_handshake(*session);
244
		} while ((ret < 0) && (gnutls_error_is_fatal(ret) == 0));
245
246
		if (ret < 0)
247
		{
248
			gnutls_deinit(*session);
249
			*session = NULL;
250
		}
251
252
		return 1;
253
	}
254
255
	return sendstring_plaintext(s, error500_auth);
256
}
257
258
542
SOCKET create_datasocket(PFTPCONTEXT context)
259
{
260
	SOCKET				clientsocket = INVALID_SOCKET;
261
	struct sockaddr_in	laddr;
262
	socklen_t			asz;
263
264
	memset(&laddr, 0, sizeof(laddr));
265
266
542
	switch ( context->Mode ) {
267
431
	case MODE_NORMAL:
268
431
		clientsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
269
431
		context->DataSocket = clientsocket;
270
431
		if ( clientsocket == INVALID_SOCKET )
271
			return INVALID_SOCKET;
272
273
431
		laddr.sin_family = AF_INET;
274
431
		laddr.sin_port = context->DataPort;
275
431
		laddr.sin_addr.s_addr = context->DataIPv4;
276
431
		if ( connect(clientsocket, (const struct sockaddr *)&laddr, sizeof(laddr)) == -1 ) {
277
431
			close(clientsocket);
278
431
			return INVALID_SOCKET;
279
		}
280
		break;
281
282
111
	case MODE_PASSIVE:
283
111
		asz = sizeof(laddr);
284
111
		clientsocket = accept(context->DataSocket, (struct sockaddr *)&laddr, &asz);
285
34
		close(context->DataSocket);
286
34
		context->DataSocket = clientsocket;
287
288
34
		if ( clientsocket == INVALID_SOCKET )
289
			return INVALID_SOCKET;
290
291
		context->DataIPv4 = 0;
292
		context->DataPort = 0;
293
		context->Mode = MODE_NORMAL;
294
		break;
295
296
	default:
297
		return INVALID_SOCKET;
298
	}
299
	return clientsocket;
300
}
301
302
15073
ssize_t sendstring(PFTPCONTEXT context, const char *Buffer)
303
{
304
15073
	size_t	l = strlen(Buffer);
305
306
15073
	if (context->TLS_session == NULL)
307
15073
		return (send(context->ControlSocket, Buffer, l, MSG_NOSIGNAL) >= 0);
308
	else
309
		return (gnutls_record_send(context->TLS_session, Buffer, l) >= 0);
310
}
311
312
ssize_t sendstring_auto(SOCKET s, gnutls_session_t session, const char *Buffer)
313
{
314
	size_t	l = strlen(Buffer);
315
316
	if (session == NULL)
317
		return (send(s, Buffer, l, MSG_NOSIGNAL) >= 0);
318
	else
319
		return (gnutls_record_send(session, Buffer, l) >= 0);
320
}
321
322
ssize_t send_auto(int __fd, gnutls_session_t session, const void *__buf, size_t __n)
323
{
324
	if (session == NULL)
325
		return (send(__fd, __buf, __n, MSG_NOSIGNAL));
326
	else
327
		return (gnutls_record_send(session, __buf, __n));
328
}
329
330
ssize_t recv_auto(int __fd, gnutls_session_t session, void *__buf, size_t __n)
331
{
332
	if (session == NULL)
333
		return (recv(__fd, __buf, __n, 0));
334
	else
335
		return (gnutls_record_recv(session, __buf, __n));
336
}
337
338
19933
ssize_t writeconsolestr(const char *Buffer)
339
{
340
19933
	size_t	l = strlen(Buffer);
341
342
19933
	if ( g_log != -1 )
343
19933
		write(g_log, Buffer, l);
344
345
19933
	return write(STDOUT_FILENO, Buffer, l);
346
}
347
348
19933
int writelogentry(PFTPCONTEXT context, const char *logtext1, const char *logtext2)
349
19933
{
350
19933
	char		text[SIZE_OF_GPBUFFER];
351
19933
	time_t		itm = time(NULL);
352
	struct tm	ltm;
353
354
19933
	localtime_r(&itm, &ltm);
355
356
19933
	if (context == NULL)
357
	{
358
657
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u : %s%s\r\n",
359
657
				ltm.tm_mday, ltm.tm_mon+1, ltm.tm_year+1900,
360
				ltm.tm_hour, ltm.tm_min, ltm.tm_sec, logtext1, logtext2);
361
	}
362
	else
363
	{
364
19276
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u S-id=%u : %s%s\r\n",
365
19276
				ltm.tm_mday, ltm.tm_mon+1, ltm.tm_year+1900,
366
				ltm.tm_hour, ltm.tm_min, ltm.tm_sec,
367
				context->SessionID, logtext1, logtext2);
368
	}
369
370
19933
	return writeconsolestr(text);
371
}
372
373
795
void WorkerThreadCleanup(PFTPCONTEXT context)
374
{
375
	int					err;
376
795
	void				*retv = NULL;
377
378
795
	if ( context->WorkerThreadValid == 0 ) {
379
380
		/*
381
		 * trying to stop gracefully
382
		 */
383
77
		context->WorkerThreadAbort = 1;
384
77
		sleep(2);
385
386
77
		err = pthread_join(context->WorkerThreadId, &retv);
387
		if ( err != 0)
388
		{
389
			writelogentry(context, "Enter cancel", "");
390
			pthread_cancel(context->WorkerThreadId);
391
		}
392
393
		context->WorkerThreadValid = -1;
394
	}
395
396
718
	if ( context->DataSocket != INVALID_SOCKET ) {
397
312
		close(context->DataSocket);
398
312
		context->DataSocket = INVALID_SOCKET;
399
	}
400
401
718
	if ( context->File != -1 ) {
402
		close(context->File);
403
		context->File = -1;
404
	}
405
406
718
	context->DataIPv4 = 0;
407
718
	context->DataPort = 0;
408
	//writelogentry(context, "WorkerThreadCleanup complete", "");
409
718
}
410
411
1203
int ftpUSER(PFTPCONTEXT context, const char *params)
412
{
413
1203
	if ( params == NULL )
414
389
		return sendstring(context, error501);
415
416
814
	context->Access = FTP_ACCESS_NOT_LOGGED_IN;
417
418
	/*
419
	 * Save username in GPBuffer for next PASS command
420
	 */
421
422
814
	writelogentry(context, " USER: ", (char *)params);
423
424
814
	strcpy(context->GPBuffer, interm331);
425
814
	strcat(context->GPBuffer, params);
426
814
	strcat(context->GPBuffer, interm331_tail);
427
814
	sendstring(context, context->GPBuffer);
428
429
814
	strcpy(context->GPBuffer, params);
430
814
	return 1;
431
}
432
433
381
int ftpQUIT(PFTPCONTEXT context, const char *params)
434
{
435
381
	writelogentry(context, " QUIT", "");
436
381
	sendstring(context, success221);
437
	/*
438
	 * retrun 0 to break command processing loop
439
	 */
440
381
	return 0;
441
}
442
443
10
int ftpNOOP(PFTPCONTEXT context, const char *params)
444
{
445
10
	return sendstring(context, success200);
446
}
447
448
620
int ftpPWD(PFTPCONTEXT context, const char *params)
449
{
450
620
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
451
169
		return sendstring(context, error530);
452
453
451
	strcpy(context->GPBuffer, "257 \"");
454
451
	strcat(context->GPBuffer, context->CurrentDir);
455
451
	strcat(context->GPBuffer, "\" is a current directory.\r\n");
456
451
	return sendstring(context, context->GPBuffer);
457
}
458
459
110
int ftpTYPE(PFTPCONTEXT context, const char *params)
460
{
461
110
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
462
31
		return sendstring(context, error530);
463
464
79
	if (params == NULL)
465
33
		return sendstring(context, error501);
466
467
46
	switch (*params)
468
	{
469
6
	case 'A':
470
	case 'a':
471
6
		return sendstring(context, success200_1);
472
16
	case 'I':
473
	case 'i':
474
16
		return sendstring(context, success200_2);
475
	}
476
477
24
	return sendstring(context, error501);
478
}
479
480
1328
int ftpPORT(PFTPCONTEXT context, const char *params)
481
{
482
	int			c;
483
	in_addr_t	DataIP = 0, DataPort = 0;
484
	char		*p = (char *)params;
485
486
1328
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
487
365
		return sendstring(context, error530);
488
489
963
	if ( params == NULL )
490
73
		return sendstring(context, error501);
491
492
4115
	for (c = 0; c < 4; c++) {
493
3494
		DataIP += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
494
8623
		while ( (*p >= '0') && (*p <= '9') )
495
5129
			p++;
496
3494
		if ( *p == 0 )
497
			break;
498
3225
		p++;
499
	}
500
501
1756
	for (c = 0; c < 2; c++) {
502
1498
		DataPort += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
503
3823
		while ( (*p >= '0') && (*p <= '9') )
504
2325
			p++;
505
1498
		if ( *p == 0 )
506
			break;
507
866
		p++;
508
	}
509
510
890
	if ( DataIP != context->ClientIPv4 )
511
603
		return sendstring(context, error501);
512
513
287
	context->DataIPv4 = DataIP;
514
287
	context->DataPort = DataPort;
515
287
	context->Mode = MODE_NORMAL;
516
517
287
	return sendstring(context, success200);
518
}
519
520
/*
521
filemode.c -- make a string describing file modes
522
523
  Copyright (C) 1985, 1990, 1993, 1998-2000, 2004, 2006, 2009-2018 Free
524
  Software Foundation, Inc.
525
*/
526
527
/* Return a character indicating the type of file described by
528
   file mode BITS:
529
   '-' regular file
530
   'b' block special file
531
   'c' character special file
532
   'C' high performance ("contiguous data") file
533
   'd' directory
534
   'D' door
535
   'l' symbolic link
536
   'm' multiplexed file (7th edition Unix; obsolete)
537
   'n' network special file (HP-UX)
538
   'p' fifo (named pipe)
539
   'P' port
540
   's' socket
541
   'w' whiteout (4.4BSD)
542
   '?' some other file type  */
543
544
static char
545
ftypelet (mode_t bits)
546
{
547
  /* These are the most common, so test for them first.  */
548
  if (S_ISREG (bits))
549
    return '-';
550
  if (S_ISDIR (bits))
551
    return 'd';
552
553
  /* Other letters standardized by POSIX 1003.1-2004.  */
554
  if (S_ISBLK (bits))
555
    return 'b';
556
  if (S_ISCHR (bits))
557
    return 'c';
558
  if (S_ISLNK (bits))
559
    return 'l';
560
  if (S_ISFIFO (bits))
561
    return 'p';
562
563
  /* Other file types (though not letters) standardized by POSIX.  */
564
  if (S_ISSOCK (bits))
565
    return 's';
566
567
  return '?';
568
}
569
570
/* Like filemodestring, but rely only on MODE.  */
571
572
void
573
strmode (mode_t mode, char *str)
574
{
575
  str[0] = ftypelet (mode);
576
  str[1] = mode & S_IRUSR ? 'r' : '-';
577
  str[2] = mode & S_IWUSR ? 'w' : '-';
578
  str[3] = (mode & S_ISUID
579
            ? (mode & S_IXUSR ? 's' : 'S')
580
            : (mode & S_IXUSR ? 'x' : '-'));
581
  str[4] = mode & S_IRGRP ? 'r' : '-';
582
  str[5] = mode & S_IWGRP ? 'w' : '-';
583
  str[6] = (mode & S_ISGID
584
            ? (mode & S_IXGRP ? 's' : 'S')
585
            : (mode & S_IXGRP ? 'x' : '-'));
586
  str[7] = mode & S_IROTH ? 'r' : '-';
587
  str[8] = mode & S_IWOTH ? 'w' : '-';
588
  str[9] = (mode & S_ISVTX
589
            ? (mode & S_IXOTH ? 't' : 'T')
590
            : (mode & S_IXOTH ? 'x' : '-'));
591
  str[10] = ' ';
592
  str[11] = '\0';
593
}
594
595
/*
596
	END  filemode.c
597
*/
598
599
int list_sub (char *dirname, SOCKET s, gnutls_session_t session, struct dirent *entry)
600
{
601
	char			text[SIZE_OF_GPBUFFER],
602
					sacl[12];
603
604
	struct stat		filestats;
605
	struct tm		ftm_fields;
606
	time_t			deltatime;
607
608
	if (strcmp(entry->d_name, ".") == 0)
609
		return 1;
610
	if (strcmp(entry->d_name, "..") == 0)
611
		return 1;
612
613
	strcpy(text, dirname);
614
	add_last_slash(text);
615
	strcat(text, entry->d_name);
616
617
	if ( lstat(text, &filestats) == 0 )
618
	{
619
		strmode(filestats.st_mode, sacl);
620
621
		localtime_r(&filestats.st_mtime, &ftm_fields);
622
		deltatime = time(NULL) - filestats.st_mtime;
623
624
		if (deltatime <= 180*24*60*60) {
625
			snprintf(text, sizeof(text), "%s %lu %lu %lu %llu %s %02u %02u:%02u %s\r\n",
626
				sacl, filestats.st_nlink,
627
				(unsigned long int)filestats.st_uid,
628
				(unsigned long int)filestats.st_gid,
629
				(unsigned long long int)filestats.st_size,
630
				shortmonths[(ftm_fields.tm_mon)], ftm_fields.tm_mday,
631
				ftm_fields.tm_hour, ftm_fields.tm_min, entry->d_name);
632
		}
633
		else
634
		{
635
			snprintf(text, sizeof(text), "%s %lu %lu %lu %llu %s %02u %02u %s\r\n",
636
				sacl, filestats.st_nlink,
637
				(unsigned long int)filestats.st_uid,
638
				(unsigned long int)filestats.st_gid,
639
				(unsigned long long int)filestats.st_size,
640
				shortmonths[(ftm_fields.tm_mon)], ftm_fields.tm_mday,
641
				ftm_fields.tm_year + 1900, entry->d_name);
642
		}
643
644
	}
645
646
	return sendstring_auto(s, session, text);
647
}
648
649
395
void *list_thread(PFTPCONTEXT context)
650
{
651
	SOCKET				clientsocket;
652
	gnutls_session_t	TLS_datasession;
653
	int					ret;
654
	DIR					*pdir;
655
	struct dirent		*entry;
656
657
395
	pthread_mutex_lock(&context->MTLock);
658
395
	pthread_cleanup_push(cleanup_handler, context);
659
	ret = 0;
660
395
	TLS_datasession = NULL;
661
662
395
	clientsocket = create_datasocket(context);
663
330
	while (clientsocket != INVALID_SOCKET)
664
	{
665
		if (context->TLS_session != NULL)
666
			InitTLSSession(&TLS_datasession, clientsocket, 0);
667
668
		pdir = opendir(context->GPBuffer);
669
		if (pdir == NULL)
670
			break;
671
672
		while ((entry = readdir(pdir)) != NULL) {
673
			ret = list_sub(context->GPBuffer, clientsocket, TLS_datasession, entry);
674
			if ( (ret == 0) || (context->WorkerThreadAbort != 0 ))
675
				break;
676
		}
677
678
		closedir(pdir);
679
		break;
680
	}
681
682
330
	if (TLS_datasession != NULL)
683
	{
684
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
685
		gnutls_deinit(TLS_datasession);
686
	}
687
688
330
	writelogentry(context, " LIST complete", "");
689
690
330
	if (clientsocket == INVALID_SOCKET) {
691
330
		sendstring(context, error451);
692
	}
693
	else {
694
		if ((context->WorkerThreadAbort == 0) && (ret != 0))
695
			sendstring(context, success226);
696
		else
697
			sendstring(context, error426);
698
699
		close(clientsocket);
700
		context->DataSocket = INVALID_SOCKET;
701
	}
702
703
330
	context->WorkerThreadValid = -1;
704
330
	pthread_cleanup_pop(0);
705
330
	pthread_mutex_unlock(&context->MTLock);
706
330
	return NULL;
707
}
708
709
918
int ftpLIST(PFTPCONTEXT context, const char *params)
710
{
711
	struct	stat	filestats;
712
	pthread_t		tid;
713
714
918
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
715
265
		return sendstring(context, error530);
716
653
	if (context->WorkerThreadValid == 0)
717
73
		return sendstring(context, error550_t);
718
719
580
	if (params != NULL)
720
	{
721

185
		if ((strcmp(params, "-a") == 0) || (strcmp(params, "-l") == 0))
722
			params = NULL;
723
	}
724
725
580
	if (finalpath(
726
580
			context->RootDir,
727
580
			context->CurrentDir,
728
			(char *)params, context->GPBuffer) == NULL)
729
		return 0;
730
731
580
	while (stat(context->GPBuffer, &filestats) == 0)
732
	{
733
395
		if ( !S_ISDIR(filestats.st_mode) )
734
			break;
735
736
395
		sendstring(context, interm150);
737
395
		writelogentry(context, " LIST", (char *)params);
738
395
		context->WorkerThreadAbort = 0;
739
740
395
		pthread_mutex_lock(&context->MTLock);
741
742
395
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&list_thread, context);
743
395
		if ( context->WorkerThreadValid == 0 )
744
395
			context->WorkerThreadId = tid;
745
		else
746
			sendstring(context, error451);
747
748
395
		pthread_mutex_unlock(&context->MTLock);
749
750
395
		return 1;
751
	}
752
753
185
	return sendstring(context, error550);
754
}
755
756
64
int ftpCDUP(PFTPCONTEXT context, const char *params)
757
{
758
64
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
759
20
		return sendstring(context, error530);
760
761
44
	if ( strcmp(context->CurrentDir, "/") == 0 )
762
44
		return sendstring(context, success250);
763
764
	delete_last_slash(context->CurrentDir);
765
	filepath(context->CurrentDir);
766
767
	writelogentry(context, " CDUP", "");
768
	return sendstring(context, success250);
769
}
770
771
7
int ftpCWD(PFTPCONTEXT context, const char *params)
772
{
773
	struct	stat	filestats;
774
	size_t			rl;
775
776
7
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
777
3
		return sendstring(context, error530);
778
779
4
	if ( params == NULL )
780
3
		return sendstring(context, error501);
781
782
1
	if (finalpath(
783
1
			context->RootDir,
784
1
			context->CurrentDir,
785
			(char *)params, context->GPBuffer) == NULL)
786
		return 0;
787
788
1
	if ( stat(context->GPBuffer, &filestats) == 0 )
789
		if ( S_ISDIR(filestats.st_mode) )
790
		{
791
			rl = strlen(context->RootDir);
792
			strcpy(context->CurrentDir, context->GPBuffer+rl);
793
			writelogentry(context, " CWD: ", context->CurrentDir);
794
			return sendstring(context, success250);
795
		}
796
797
1
	return sendstring(context, error550);
798
}
799
800
void *retr_thread(PFTPCONTEXT context)
801
{
802
	volatile SOCKET		clientsocket;
803
	int					sent_ok, f;
804
	off_t				offset;
805
	ssize_t				sz, sz_total;
806
	size_t				buffer_size;
807
	char				*buffer;
808
	struct timespec		t;
809
	signed long long	lt0, lt1, dtx;
810
	gnutls_session_t	TLS_datasession;
811
812
	pthread_mutex_lock(&context->MTLock);
813
	pthread_cleanup_push(cleanup_handler, context);
814
815
	sent_ok = 0;
816
	sz_total = 0;
817
	buffer = NULL;
818
	TLS_datasession = NULL;
819
	f = -1;
820
	clock_gettime(CLOCK_MONOTONIC, &t);
821
	lt0 = t.tv_sec*1e9 + t.tv_nsec;
822
823
	buffer = malloc(TRANSMIT_BUFFER_SIZE);
824
	while (buffer != NULL)
825
	{
826
        clientsocket = create_datasocket(context);
827
        if (clientsocket == INVALID_SOCKET)
828
            break;
829
830
		if (context->TLS_session != NULL)
831
		{
832
			InitTLSSession(&TLS_datasession, clientsocket, 0);
833
			buffer_size = gnutls_record_get_max_size(TLS_datasession);
834
			if (buffer_size > TRANSMIT_BUFFER_SIZE)
835
				buffer_size = TRANSMIT_BUFFER_SIZE;
836
		}
837
		else
838
			buffer_size = TRANSMIT_BUFFER_SIZE;
839
840
		f = open(context->GPBuffer, O_RDONLY);
841
		context->File = f;
842
		if (f == -1)
843
			break;
844
845
		offset = lseek(f, context->RestPoint, SEEK_SET);
846
		if (offset != context->RestPoint)
847
			break;
848
849
		while ( context->WorkerThreadAbort == 0 ) {
850
			sz = read(f, buffer, buffer_size);
851
			if (sz <= 0)
852
				break;
853
854
			sz_total += sz;
855
856
			if (send_auto(clientsocket, TLS_datasession, buffer, sz) == sz)
857
				sent_ok = 1;
858
			else
859
			{
860
				sent_ok = 0;
861
				break;
862
			}
863
		}
864
865
		break;
866
	}
867
868
	clock_gettime(CLOCK_MONOTONIC, &t);
869
	lt1 = t.tv_sec*1e9 + t.tv_nsec;
870
871
	if (f != -1)
872
		close(f);
873
874
	context->File = -1;
875
876
	if (TLS_datasession != NULL)
877
	{
878
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
879
		gnutls_deinit(TLS_datasession);
880
	}
881
882
	/* calculating performance */
883
	dtx = lt1 - lt0;
884
885
    if (buffer != NULL) {
886
	    sprintf(buffer,  " RETR complete. %zd bytes (%f MBytes) total sent in %f seconds (%f MBytes/s)",
887
	    	sz_total, sz_total/1048576.0, dtx/1000000000.0, (1000000000.0*sz_total)/dtx/1048576);
888
        writelogentry(context, buffer, "");
889
        free(buffer);
890
    }
891
892
	if (clientsocket == INVALID_SOCKET) {
893
		sendstring(context, error451);
894
	}
895
	else {
896
		if ((context->WorkerThreadAbort == 0) && (sent_ok != 0))
897
			sendstring(context, success226);
898
		else
899
			sendstring(context, error426);
900
901
		close(clientsocket);
902
		context->DataSocket = INVALID_SOCKET;
903
	}
904
905
	context->WorkerThreadValid = -1;
906
	pthread_cleanup_pop(0);
907
	pthread_mutex_unlock(&context->MTLock);
908
	return NULL;
909
}
910
911
93
int ftpRETR(PFTPCONTEXT context, const char *params)
912
{
913
	struct	stat	filestats;
914
	pthread_t		tid;
915
916
93
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
917
38
		return sendstring(context, error530);
918
55
	if (context->WorkerThreadValid == 0)
919
12
		return sendstring(context, error550_t);
920
43
	if ( params == NULL )
921
29
		return sendstring(context, error501);
922
923
14
	if ( context->File != -1 ) {
924
		close(context->File);
925
		context->File = -1;
926
	}
927
928
14
	if (finalpath(
929
14
			context->RootDir,
930
14
			context->CurrentDir,
931
			(char *)params, context->GPBuffer) == NULL)
932
		return 0;
933
934
14
	while (stat(context->GPBuffer, &filestats) == 0)
935
	{
936
		if ( S_ISDIR(filestats.st_mode) )
937
			break;
938
939
		sendstring(context, interm150);
940
		writelogentry(context, " RETR: ", (char *)params);
941
		context->WorkerThreadAbort = 0;
942
943
		pthread_mutex_lock(&context->MTLock);
944
945
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&retr_thread, context);
946
		if ( context->WorkerThreadValid == 0 )
947
			context->WorkerThreadId = tid;
948
		else
949
			sendstring(context, error451);
950
951
		pthread_mutex_unlock(&context->MTLock);
952
953
		return 1;
954
	}
955
956
14
	return sendstring(context, error550);
957
}
958
959
172
int ftpABOR(PFTPCONTEXT context, const char *params)
960
{
961
172
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
962
32
		return sendstring(context, error530);
963
964
140
	writelogentry(context, " ABORT command", NULL);
965
140
	WorkerThreadCleanup(context);
966
138
	return sendstring(context, success226);
967
}
968
969
86
int ftpDELE(PFTPCONTEXT context, const char *params)
970
{
971
86
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
972
17
		return sendstring(context, error530);
973
69
	if ( context->Access < FTP_ACCESS_FULL )
974
27
		return sendstring(context, error550_r);
975
42
	if ( params == NULL )
976
28
		return sendstring(context, error501);
977
978
14
	if (finalpath(
979
14
			context->RootDir,
980
14
			context->CurrentDir,
981
			(char *)params, context->GPBuffer) == NULL)
982
		return 0;
983
984
14
	if ( unlink(context->GPBuffer) == 0 ) {
985
		sendstring(context, success250);
986
		writelogentry(context, " DELE: ", (char *)params);
987
	}
988
	else
989
14
		sendstring(context, error550_r);
990
991
	return 1;
992
}
993
994
525
int pasv(PFTPCONTEXT context)
995
{
996
	SOCKET				datasocket;
997
	struct sockaddr_in	laddr;
998
	int					socketret = -1, result = 0;
999
	unsigned long		c;
1000
	struct	timespec	rtctime;
1001
1002
	while (1)
1003
	{
1004
525
		if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1005
		{
1006
157
			sendstring(context, error530);
1007
157
			break;
1008
		}
1009
1010
368
		if ( context->WorkerThreadValid == 0 )
1011
		{
1012
68
			sendstring(context, error550_t);
1013
68
			break;
1014
		}
1015
1016
300
		if ( context->DataSocket != INVALID_SOCKET )
1017
149
			close(context->DataSocket);
1018
1019
300
		context->DataSocket = INVALID_SOCKET;
1020
1021
300
		datasocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1022
300
		if (datasocket == INVALID_SOCKET)
1023
		{
1024
			sendstring(context, error451);
1025
			break;
1026
		}
1027
1028
300
		for (c = g_cfg.PasvPortBase; c <= g_cfg.PasvPortMax; c++) {
1029
300
			clock_gettime(CLOCK_REALTIME, &rtctime);
1030
			memset(&laddr, 0, sizeof(laddr));
1031
300
			laddr.sin_family = AF_INET;
1032
300
			laddr.sin_port = htons((in_port_t)(g_cfg.PasvPortBase +
1033
				(rtctime.tv_nsec % (g_cfg.PasvPortMax-g_cfg.PasvPortBase))));
1034
300
			laddr.sin_addr.s_addr = context->ServerIPv4;
1035
300
			socketret = bind(datasocket, (struct sockaddr *)&laddr, sizeof(laddr));
1036
300
			if ( socketret == 0 )
1037
				break;
1038
		}
1039
1040
300
		if ( socketret != 0 ) {
1041
			close(datasocket);
1042
			sendstring(context, error451);
1043
			break;
1044
		}
1045
1046
300
		socketret = listen(datasocket, SOMAXCONN);
1047
300
		if (socketret != 0) {
1048
			close(datasocket);
1049
			sendstring(context, error451);
1050
			break;
1051
		}
1052
1053
300
		if ((context->ClientIPv4 & g_cfg.LocalIPMask) == (context->ServerIPv4 & g_cfg.LocalIPMask))
1054
		{
1055
300
			context->DataIPv4 = context->ServerIPv4;
1056
300
			writelogentry(context, " local client.", "");
1057
		} else {
1058
			context->DataIPv4 = g_cfg.ExternalInterface;
1059
			writelogentry(context, " nonlocal client.", "");
1060
		}
1061
1062
300
		context->DataPort = laddr.sin_port;
1063
300
		context->DataSocket = datasocket;
1064
300
		context->Mode = MODE_PASSIVE;
1065
1066
		result = 1;
1067
300
		break;
1068
	}
1069
1070
525
	return result;
1071
}
1072
1073
313
int ftpEPSV (PFTPCONTEXT context, const char *params)
1074
{
1075
313
	if (pasv(context) == 0)
1076
		return 1;
1077
1078
176
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success229,
1079
176
			ntohs(context->DataPort));
1080
1081
176
	writelogentry(context, " entering extended passive mode", "");
1082
1083
176
	return sendstring(context, context->GPBuffer);
1084
}
1085
1086
212
int ftpPASV(PFTPCONTEXT context, const char *params)
1087
{
1088
212
	if (pasv(context) == 0)
1089
		return 1;
1090
1091
124
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success227,
1092
			context->DataIPv4 & 0xff,
1093
124
			(context->DataIPv4 >> 8) & 0xff,
1094
124
			(context->DataIPv4 >> 16) & 0xff,
1095
124
			(context->DataIPv4 >> 24) & 0xff,
1096
			context->DataPort & 0xff,
1097
124
			(context->DataPort >> 8) & 0xff);
1098
1099
124
	writelogentry(context, " entering passive mode", "");
1100
1101
124
	return sendstring(context, context->GPBuffer);
1102
}
1103
1104
1772
int ftpPASS(PFTPCONTEXT context, const char *params)
1105
{
1106
	char	temptext[256];
1107
1108
1772
	if ( params == NULL )
1109
44
		return sendstring(context, error501);
1110
1111
	memset(temptext, 0, sizeof(temptext));
1112
1113
	/*
1114
	 * we have username saved in context->GPBuffer from USER command
1115
	 */
1116
1728
	if (!ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "pswd", temptext, sizeof(temptext)))
1117
483
		return sendstring(context, error530_r);
1118
1119

1245
	if ( (strcmp(temptext, params) == 0) || (temptext[0] == '*') )
1120
	{
1121
783
		memset(context->RootDir, 0, sizeof(context->RootDir));
1122
		memset(temptext, 0, sizeof(temptext));
1123
1124
783
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "root", context->RootDir, sizeof(context->RootDir));
1125
783
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "accs", temptext, sizeof(temptext));
1126
1127
783
		context->Access = FTP_ACCESS_NOT_LOGGED_IN;
1128
		do {
1129
1130
783
			if ( strcasecmp(temptext, "admin") == 0 ) {
1131
616
				context->Access = FTP_ACCESS_FULL;
1132
616
				break;
1133
			}
1134
1135
167
			if ( strcasecmp(temptext, "upload") == 0 ) {
1136
99
				context->Access = FTP_ACCESS_CREATENEW;
1137
99
				break;
1138
			}
1139
1140
68
			if ( strcasecmp(temptext, "readonly") == 0 ) {
1141
68
				context->Access = FTP_ACCESS_READONLY;
1142
68
				break;
1143
			}
1144
1145
			return sendstring(context, error530_b);
1146
		} while (0);
1147
1148
783
		writelogentry(context, " PASS->successful logon", "");
1149
	}
1150
	else
1151
462
		return sendstring(context, error530_r);
1152
1153
783
	return sendstring(context, success230);
1154
}
1155
1156
29
int ftpREST(PFTPCONTEXT context, const char *params)
1157
{
1158
29
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1159
10
		return sendstring(context, error530);
1160
1161
19
	if ( params == NULL )
1162
10
		return sendstring(context, error501);
1163
1164
9
	context->RestPoint = strtoull(params, NULL, 10);
1165
9
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, "%s %llu\r\n",
1166
			interm350, (unsigned long long int)context->RestPoint);
1167
1168
9
	return sendstring(context, context->GPBuffer);
1169
}
1170
1171
114
int ftpSIZE(PFTPCONTEXT context, const char *params)
1172
{
1173
	struct stat		filestats;
1174
1175
114
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1176
22
		return sendstring(context, error530);
1177
92
	if ( params == NULL )
1178
50
		return sendstring(context, error501);
1179
1180
42
	if (finalpath(
1181
42
			context->RootDir,
1182
42
			context->CurrentDir,
1183
			(char *)params, context->GPBuffer) == NULL)
1184
		return 0;
1185
1186
42
	if ( stat(context->GPBuffer, &filestats) == 0 )
1187
	{
1188
12
		snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, "213 %llu\r\n",
1189
12
				(unsigned long long int)filestats.st_size);
1190
12
		sendstring(context, context->GPBuffer);
1191
	}
1192
	else
1193
30
		sendstring(context, error550);
1194
1195
	return 1;
1196
}
1197
1198
677
int ftpMKD(PFTPCONTEXT context, const char *params)
1199
{
1200
677
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1201
148
		return sendstring(context, error530);
1202
529
	if ( context->Access < FTP_ACCESS_CREATENEW )
1203
17
		return sendstring(context, error550_r);
1204
512
	if ( params == NULL )
1205
40
		return sendstring(context, error501);
1206
1207
472
	if (finalpath(
1208
472
			context->RootDir,
1209
472
			context->CurrentDir,
1210
			(char *)params, context->GPBuffer) == NULL)
1211
		return 0;
1212
1213
472
	if ( mkdir(context->GPBuffer, 0755) == 0 ) {
1214
411
		sendstring(context, success257);
1215
411
		writelogentry(context, " MKD: ", (char *)params);
1216
	}
1217
	else
1218
61
		sendstring(context, error550_r);
1219
1220
	return 1;
1221
}
1222
1223
40
int ftpRMD(PFTPCONTEXT context, const char *params)
1224
{
1225
40
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1226
11
		return sendstring(context, error530);
1227
29
	if ( context->Access < FTP_ACCESS_FULL )
1228
10
		return sendstring(context, error550_r);
1229
19
	if ( params == NULL )
1230
12
		return sendstring(context, error501);
1231
1232
7
	if (finalpath(
1233
7
			context->RootDir,
1234
7
			context->CurrentDir,
1235
			(char *)params, context->GPBuffer) == NULL)
1236
		return 0;
1237
1238
7
	if ( rmdir(context->GPBuffer) == 0 ) {
1239
		sendstring(context, success250);
1240
		writelogentry(context, " DELE: ", (char *)params);
1241
	}
1242
	else
1243
7
		sendstring(context, error550_r);
1244
1245
	return 1;
1246
}
1247
1248
83
void *stor_thread(PFTPCONTEXT context)
1249
{
1250
	SOCKET				clientsocket;
1251
	int					f;
1252
	ssize_t				sz, sz_total;
1253
	char				*buffer;
1254
	struct timespec		t;
1255
	signed long long	lt0, lt1, dtx;
1256
	gnutls_session_t	TLS_datasession;
1257
1258
83
	pthread_mutex_lock(&context->MTLock);
1259
83
	pthread_cleanup_push(cleanup_handler, context);
1260
1261
	f = -1;
1262
	sz_total = 0;
1263
	buffer = NULL;
1264
83
	TLS_datasession = NULL;
1265
83
	clock_gettime(CLOCK_MONOTONIC, &t);
1266
83
	lt0 = t.tv_sec*1e9 + t.tv_nsec;
1267
1268
83
	clientsocket = create_datasocket(context);
1269
72
	while (clientsocket != INVALID_SOCKET)
1270
	{
1271
		buffer = malloc(TRANSMIT_BUFFER_SIZE);
1272
		if (buffer == NULL)
1273
			break;
1274
1275
		if (context->TLS_session != NULL)
1276
			InitTLSSession(&TLS_datasession, clientsocket, 0);
1277
1278
		f = open(context->GPBuffer, context->CreateMode, S_IRWXU | S_IRGRP | S_IROTH);
1279
		context->File = f;
1280
		if (f == -1)
1281
			break;
1282
1283
		while ( context->WorkerThreadAbort == 0 ) {
1284
			sz = recv_auto(clientsocket, TLS_datasession, buffer, TRANSMIT_BUFFER_SIZE);
1285
			if (sz > 0)
1286
			{
1287
				sz_total += sz;
1288
				write(f, buffer, sz);
1289
			}
1290
			else
1291
				break;
1292
		}
1293
1294
		break;
1295
	}
1296
1297
72
	clock_gettime(CLOCK_MONOTONIC, &t);
1298
72
	lt1 = t.tv_sec*1e9 + t.tv_nsec;
1299
1300
72
	if (f != -1)
1301
		close(f);
1302
1303
72
	context->File = -1;
1304
1305
72
	if (TLS_datasession != NULL)
1306
	{
1307
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1308
		gnutls_deinit(TLS_datasession);
1309
	}
1310
1311
	/* calculating performance */
1312
72
	if (buffer != NULL)
1313
	{
1314
		dtx = lt1 - lt0;
1315
		sprintf(buffer,  " STOR complete. %zd bytes (%f MBytes) total sent in %f seconds (%f MBytes/s)",
1316
				sz_total, sz_total/1048576.0, dtx/1000000000.0, (1000000000.0*sz_total)/dtx/1048576);
1317
		writelogentry(context, buffer, "");
1318
		free(buffer);
1319
	}
1320
1321
72
	if (clientsocket == INVALID_SOCKET) {
1322
72
		sendstring(context, error451);
1323
	}
1324
	else {
1325
		if (context->WorkerThreadAbort == 0)
1326
			sendstring(context, success226);
1327
		else
1328
			sendstring(context, error426);
1329
1330
		close(clientsocket);
1331
		context->DataSocket = INVALID_SOCKET;
1332
	}
1333
1334
72
	context->WorkerThreadValid = -1;
1335
72
	pthread_cleanup_pop(0);
1336
72
	pthread_mutex_unlock(&context->MTLock);
1337
72
	return NULL;
1338
}
1339
1340
212
int ftpSTOR(PFTPCONTEXT context, const char *params)
1341
{
1342
	struct	stat	filestats;
1343
	pthread_t		tid;
1344
1345
212
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1346
26
		return sendstring(context, error530);
1347
186
	if ( context->Access < FTP_ACCESS_CREATENEW )
1348
30
		return sendstring(context, error550_r);
1349
156
	if ( params == NULL )
1350
27
		return sendstring(context, error501);
1351
129
	if ( context->WorkerThreadValid == 0 )
1352
24
		return sendstring(context, error550_t);
1353
1354
105
	if ( context->File != -1 ) {
1355
		close(context->File);
1356
		context->File = -1;
1357
	}
1358
1359
105
	if (finalpath(
1360
105
			context->RootDir,
1361
105
			context->CurrentDir,
1362
			(char *)params, context->GPBuffer) == NULL)
1363
		return 0;
1364
1365
105
	if ( context->Access == FTP_ACCESS_FULL )
1366
41
		context->CreateMode = O_CREAT | O_WRONLY| O_TRUNC;
1367
	else
1368
	{
1369
64
		context->CreateMode = O_CREAT | O_WRONLY| O_EXCL;
1370
64
		if (stat(context->GPBuffer, &filestats) == 0)
1371
22
			return sendstring(context, error550_r);
1372
	}
1373
1374
83
	sendstring(context, interm150);
1375
83
	writelogentry(context, " STOR: ", (char *)params);
1376
83
	context->WorkerThreadAbort = 0;
1377
1378
83
	pthread_mutex_lock(&context->MTLock);
1379
1380
83
	context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&stor_thread, context);
1381
83
	if ( context->WorkerThreadValid == 0 )
1382
83
		context->WorkerThreadId = tid;
1383
	else
1384
		sendstring(context, error451);
1385
1386
83
	pthread_mutex_unlock(&context->MTLock);
1387
1388
83
	return 1;
1389
}
1390
1391
451
int ftpSYST(PFTPCONTEXT context, const char *params)
1392
{
1393
451
	return sendstring(context, success215);
1394
}
1395
1396
25
int ftpHELP(PFTPCONTEXT context, const char *params)
1397
{
1398
25
	return sendstring(context, success214);
1399
}
1400
1401
12
int ftpSITE(PFTPCONTEXT context, const char *params)
1402
{
1403
12
	if ( params != NULL )
1404
4
		if (strcasecmp(params, "help") == 0)
1405
			return sendstring(context, "200 chmod\r\n");
1406
1407
12
	return sendstring(context, error500);
1408
}
1409
1410
150
int ftpFEAT(PFTPCONTEXT context, const char *params)
1411
{
1412
150
	return sendstring(context, success211);
1413
}
1414
1415
void *append_thread(PFTPCONTEXT context)
1416
{
1417
	SOCKET				clientsocket;
1418
	int					f;
1419
	ssize_t				sz;
1420
	char				*buffer = NULL;
1421
	gnutls_session_t	TLS_datasession;
1422
1423
	pthread_mutex_lock(&context->MTLock);
1424
	pthread_cleanup_push(cleanup_handler, context);
1425
	TLS_datasession = NULL;
1426
	f = -1;
1427
1428
	clientsocket = create_datasocket(context);
1429
	while (clientsocket != INVALID_SOCKET)
1430
	{
1431
		if (context->TLS_session != NULL)
1432
			InitTLSSession(&TLS_datasession, clientsocket, 0);
1433
1434
		f = open(context->GPBuffer, O_RDWR);
1435
		context->File = f;
1436
		if (f == -1)
1437
			break;
1438
1439
		lseek(f, 0, SEEK_END);
1440
		buffer = malloc(TRANSMIT_BUFFER_SIZE);
1441
		if (buffer == NULL)
1442
			break;
1443
1444
		while ( context->WorkerThreadAbort == 0 ) {
1445
			sz = recv_auto(clientsocket, TLS_datasession, buffer, TRANSMIT_BUFFER_SIZE);
1446
			if (sz > 0)
1447
				write(f, buffer, sz);
1448
			else
1449
				break;
1450
		}
1451
1452
		break;
1453
	}
1454
1455
	if (buffer != NULL)
1456
		free(buffer);
1457
1458
	if (f != -1)
1459
		close(f);
1460
1461
	context->File = -1;
1462
1463
	if (TLS_datasession != NULL)
1464
	{
1465
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1466
		gnutls_deinit(TLS_datasession);
1467
	}
1468
1469
	writelogentry(context, " STOR complete", "");
1470
1471
	if (clientsocket == INVALID_SOCKET) {
1472
		sendstring(context, error451);
1473
	}
1474
	else {
1475
		if (context->WorkerThreadAbort == 0)
1476
			sendstring(context, success226);
1477
		else
1478
			sendstring(context, error426);
1479
1480
		close(clientsocket);
1481
		context->DataSocket = INVALID_SOCKET;
1482
	}
1483
1484
	context->WorkerThreadValid = -1;
1485
	pthread_cleanup_pop(0);
1486
	pthread_mutex_unlock(&context->MTLock);
1487
	return NULL;
1488
}
1489
1490
93
int ftpAPPE(PFTPCONTEXT context, const char *params)
1491
{
1492
	struct	stat	filestats;
1493
	pthread_t		tid;
1494
1495
93
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1496
12
		return sendstring(context, error530);
1497
81
	if ( context->Access < FTP_ACCESS_FULL )
1498
19
		return sendstring(context, error550_r);
1499
62
	if ( params == NULL )
1500
12
		return sendstring(context, error501);
1501
50
	if ( context->WorkerThreadValid == 0 )
1502
24
		return sendstring(context, error550_t);
1503
1504
26
	if ( context->File != -1 ) {
1505
		close(context->File);
1506
		context->File = -1;
1507
	}
1508
1509
26
	if (finalpath(
1510
26
			context->RootDir,
1511
26
			context->CurrentDir,
1512
			(char *)params, context->GPBuffer) == NULL)
1513
		return 0;
1514
1515
	/*
1516
	 * stat must NOT fail
1517
	 */
1518
26
	while (stat(context->GPBuffer, &filestats) == 0)
1519
	{
1520
		/*
1521
		 * do not try to "append" for directories
1522
		*/
1523
		if ( S_ISDIR(filestats.st_mode) )
1524
			break;
1525
1526
		sendstring(context, interm150);
1527
		writelogentry(context, " APPE: ", (char *)params);
1528
		context->WorkerThreadAbort = 0;
1529
1530
		pthread_mutex_lock(&context->MTLock);
1531
1532
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&append_thread, context);
1533
		if ( context->WorkerThreadValid == 0 )
1534
			context->WorkerThreadId = tid;
1535
		else
1536
			sendstring(context, error451);
1537
1538
		pthread_mutex_unlock(&context->MTLock);
1539
1540
		return 1;
1541
	}
1542
1543
26
	return sendstring(context, error550);
1544
}
1545
1546
87
int ftpRNFR(PFTPCONTEXT context, const char *params)
1547
{
1548
	struct stat		filestats;
1549
1550
87
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1551
19
		return sendstring(context, error530);
1552
68
	if ( context->Access < FTP_ACCESS_FULL )
1553
12
		return sendstring(context, error550_r);
1554
56
	if ( params == NULL )
1555
22
		return sendstring(context, error501);
1556
1557
34
	if (finalpath(
1558
34
			context->RootDir,
1559
34
			context->CurrentDir,
1560
			(char *)params, context->GPBuffer) == NULL)
1561
		return 0;
1562
1563
34
	if ( stat(context->GPBuffer, &filestats) == 0 )
1564
	{
1565
		writelogentry(context, " RNFR: ", context->GPBuffer);
1566
		sendstring(context, interm350_ren);
1567
	}
1568
	else
1569
34
		sendstring(context, error550);
1570
1571
	return 1;
1572
}
1573
1574
138
int ftpRNTO(PFTPCONTEXT context, const char *params)
1575
{
1576
	char	*_text;
1577
1578
138
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1579
17
		return sendstring(context, error530);
1580
121
	if ( context->Access < FTP_ACCESS_FULL )
1581
27
		return sendstring(context, error550_r);
1582
94
	if ( params == NULL )
1583
7
		return sendstring(context, error501);
1584
1585
87
	_text = x_malloc(SIZE_OF_GPBUFFER);
1586
1587
87
	if (finalpath(
1588
87
			context->RootDir,
1589
87
			context->CurrentDir,
1590
			(char *)params, _text) == NULL)
1591
	{
1592
		free(_text);
1593
		return 0;
1594
	}
1595
1596
87
	if ( rename(context->GPBuffer, _text) == 0 )
1597
	{
1598
2
		writelogentry(context, " RNTO: ", _text);
1599
2
		sendstring(context, success250);
1600
	}
1601
	else
1602
85
		sendstring(context, error550);
1603
1604
87
	free(_text);
1605
87
	return 1;
1606
}
1607
1608
22
int ftpOPTS(PFTPCONTEXT context, const char *params)
1609
{
1610
22
	if ( params != NULL )
1611
12
		if (strcasecmp(params, "utf8 on") == 0)
1612
			return sendstring(context, "200 Always in UTF8 mode.\r\n");
1613
1614
22
	writelogentry(context, " unsupported OPTS: ", params);
1615
22
	return sendstring(context, error500);
1616
}
1617
1618
141
int ftpAUTH(PFTPCONTEXT context, const char *params)
1619
{
1620
141
	if ( params == NULL )
1621
14
		return sendstring(context, error501);
1622
1623
127
	if ( strcasecmp(params, "TLS") == 0 )
1624
		/* InitTLSSession will send reply */
1625
		return InitTLSSession(&context->TLS_session, context->ControlSocket, 1);
1626
	else
1627
127
		return sendstring(context, error504);
1628
}
1629
1630
89
int ftpPBSZ (PFTPCONTEXT context, const char *params)
1631
{
1632
89
	if ( params == NULL )
1633
16
		return sendstring(context, error501);
1634
1635
73
	if ( context->TLS_session == NULL )
1636
73
		return sendstring(context, error503);
1637
1638
	context->BlockSize = strtoul(params, NULL, 10);
1639
	return sendstring(context, success200);
1640
}
1641
1642
135
int ftpPROT (PFTPCONTEXT context, const char *params)
1643
{
1644
135
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1645
34
		return sendstring(context, error530);
1646
1647
101
	if ( params == NULL )
1648
14
			return sendstring(context, error501);
1649
1650
87
	if ( context->TLS_session == NULL )
1651
87
		return sendstring(context, error503);
1652
1653
	switch (*params)
1654
	{
1655
	case 'C':
1656
		context->DataProtectionLevel = 0;
1657
		return sendstring(context, success200);
1658
		break;
1659
1660
	case 'P':
1661
		context->DataProtectionLevel = 100;
1662
		return sendstring(context, success200);
1663
		break;
1664
1665
	default:
1666
		return sendstring(context, error504);
1667
	}
1668
}
1669
1670
int mlsd_sub (char *dirname, SOCKET s, gnutls_session_t session, struct dirent *entry)
1671
{
1672
	char			text[SIZE_OF_GPBUFFER], *entrytype, *sizetype;
1673
	struct stat		filestats;
1674
	struct tm		ftm_fields;
1675
1676
	if (strcmp(entry->d_name, ".") == 0)
1677
		return 1;
1678
	if (strcmp(entry->d_name, "..") == 0)
1679
		return 1;
1680
1681
	strcpy(text, dirname);
1682
	add_last_slash(text);
1683
	strcat(text, entry->d_name);
1684
1685
	if ( lstat(text, &filestats) == 0 )
1686
	{
1687
		if ( S_ISDIR(filestats.st_mode) )
1688
		{
1689
			entrytype = "dir";
1690
			sizetype = "sizd";
1691
		}
1692
		else
1693
		{
1694
			entrytype = "file";
1695
			sizetype = "size";
1696
		}
1697
1698
		if (S_ISLNK(filestats.st_mode))
1699
		{
1700
			entrytype = "OS.unix=slink";
1701
		}
1702
1703
		localtime_r(&filestats.st_mtime, &ftm_fields);
1704
		++ftm_fields.tm_mon;
1705
1706
		snprintf(text, sizeof(text),
1707
				"type=%s;%s=%llu;UNIX.mode=%lo;UNIX.owner=%lu;UNIX.group=%lu;modify=%u%02u%02u%02u%02u%02u; %s\r\n",
1708
				entrytype, sizetype,
1709
				(unsigned long long int)filestats.st_size,
1710
				(unsigned long int)filestats.st_mode,
1711
				(unsigned long int)filestats.st_uid,
1712
				(unsigned long int)filestats.st_gid,
1713
				ftm_fields.tm_year + 1900, ftm_fields.tm_mon, ftm_fields.tm_mday,
1714
				ftm_fields.tm_hour, ftm_fields.tm_min, ftm_fields.tm_sec, entry->d_name
1715
				);
1716
	}
1717
1718
	return sendstring_auto(s, session, text);
1719
}
1720
1721
64
void *msld_thread(PFTPCONTEXT context)
1722
{
1723
	SOCKET				clientsocket;
1724
	gnutls_session_t	TLS_datasession;
1725
	int					ret;
1726
	DIR					*pdir;
1727
	struct dirent		*entry;
1728
1729
64
	pthread_mutex_lock(&context->MTLock);
1730
64
	pthread_cleanup_push(cleanup_handler, context);
1731
	ret = 0;
1732
64
	TLS_datasession = NULL;
1733
1734
64
	clientsocket = create_datasocket(context);
1735
63
	while (clientsocket != INVALID_SOCKET)
1736
	{
1737
		if (context->TLS_session != NULL)
1738
			InitTLSSession(&TLS_datasession, clientsocket, 0);
1739
1740
		pdir = opendir(context->GPBuffer);
1741
		if (pdir == NULL)
1742
			break;
1743
1744
		while ((entry = readdir(pdir)) != NULL) {
1745
			ret = mlsd_sub(context->GPBuffer, clientsocket, TLS_datasession, entry);
1746
			if ( (ret == 0) || (context->WorkerThreadAbort != 0 ))
1747
				break;
1748
		}
1749
1750
		closedir(pdir);
1751
		break;
1752
	}
1753
1754
63
	if (TLS_datasession != NULL)
1755
	{
1756
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1757
		gnutls_deinit(TLS_datasession);
1758
	}
1759
1760
63
	writelogentry(context, " LIST complete", "");
1761
1762
63
	if (clientsocket == INVALID_SOCKET) {
1763
63
		sendstring(context, error451);
1764
	}
1765
	else {
1766
		if ((context->WorkerThreadAbort == 0) && (ret != 0))
1767
			sendstring(context, success226);
1768
		else
1769
			sendstring(context, error426);
1770
1771
		close(clientsocket);
1772
		context->DataSocket = INVALID_SOCKET;
1773
	}
1774
1775
63
	context->WorkerThreadValid = -1;
1776
63
	pthread_cleanup_pop(0);
1777
63
	pthread_mutex_unlock(&context->MTLock);
1778
63
	return NULL;
1779
}
1780
1781
107
int ftpMLSD(PFTPCONTEXT context, const char *params)
1782
{
1783
	struct	stat	filestats;
1784
	pthread_t		tid;
1785
1786
107
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
1787
20
		return sendstring(context, error530);
1788
87
	if (context->WorkerThreadValid == 0)
1789
20
		return sendstring(context, error550_t);
1790
1791
67
	if (finalpath(
1792
67
			context->RootDir,
1793
67
			context->CurrentDir,
1794
			(char *)params, context->GPBuffer) == NULL)
1795
		return 0;
1796
1797
67
	while (stat(context->GPBuffer, &filestats) == 0)
1798
	{
1799
64
		if ( !S_ISDIR(filestats.st_mode) )
1800
			break;
1801
1802
64
		sendstring(context, interm150);
1803
64
		writelogentry(context, " MLSD-LIST ", (char *)params);
1804
64
		context->WorkerThreadAbort = 0;
1805
1806
64
		pthread_mutex_lock(&context->MTLock);
1807
1808
64
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&msld_thread, context);
1809
64
		if ( context->WorkerThreadValid == 0 )
1810
64
			context->WorkerThreadId = tid;
1811
		else
1812
			sendstring(context, error451);
1813
1814
64
		pthread_mutex_unlock(&context->MTLock);
1815
1816
64
		return 1;
1817
	}
1818
1819
3
	return sendstring(context, error550);
1820
}
1821
1822
14227
int recvcmd(PFTPCONTEXT context, char *buffer, size_t buffer_size)
1823
{
1824
	ssize_t	l, p = 0;
1825
1826
14227
	if ( buffer_size < 5 )
1827
		return 0;
1828
1829
	memset(buffer, 0, buffer_size);
1830
14227
	--buffer_size;
1831
1832
14547
	while (buffer_size > 0)
1833
	{
1834
14540
		if (context->TLS_session == NULL)
1835
14540
			l = recv(context->ControlSocket, buffer+p, buffer_size, 0);
1836
		else
1837
			l = gnutls_record_recv(context->TLS_session, buffer+p, buffer_size);
1838
1839
14540
		if ( l <= 0 )
1840
			return 0;
1841
1842
14273
		buffer_size -= l;
1843
14273
		p += l;
1844
1845
14273
		if ( p >= 2 )
1846

14265
			if ( (buffer[p-2] == '\r') && (buffer[p-1] == '\n') )
1847
			{
1848
13953
				buffer[p-2] = 0;
1849
13953
				return 1;
1850
			}
1851
	}
1852
1853
	return 0;
1854
}
1855
1856
657
void *ftp_client_thread(SOCKET *s)
1857
657
{
1858
	FTPCONTEXT				ctx __attribute__ ((aligned (16)));
1859
657
	char					*cmd, *params, rcvbuf[FTP_PATH_MAX*2];
1860
	int						c, cmdno, rv;
1861
	size_t					i, cmdlen;
1862
	socklen_t				asz;
1863
	struct sockaddr_in		laddr;
1864
	pthread_mutexattr_t		m_attr;
1865
1866
	memset(&ctx, 0, sizeof(ctx));
1867
657
	ctx.Access = FTP_ACCESS_NOT_LOGGED_IN;
1868
657
	ctx.ControlSocket = *s;
1869
657
	ctx.GPBuffer = x_malloc(SIZE_OF_GPBUFFER);
1870
1871
	memset(&laddr, 0, sizeof(laddr));
1872
657
	asz = sizeof(laddr);
1873
657
	while ( getsockname(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) == 0 )
1874
	{
1875
657
		ctx.ServerIPv4 = laddr.sin_addr.s_addr;
1876
1877
		memset(&laddr, 0, sizeof(laddr));
1878
657
		asz = sizeof(laddr);
1879
657
		if ( getpeername(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) != 0 )
1880
			break;
1881
1882
657
		ctx.ClientIPv4 = laddr.sin_addr.s_addr;
1883
657
		ctx.Mode = MODE_NORMAL;
1884
657
		ctx.WorkerThreadAbort = 0;
1885
657
		ctx.WorkerThreadValid = -1;
1886
657
		ctx.SessionID = __sync_add_and_fetch(&g_newid, 1);
1887
657
		ctx.File = -1;
1888
657
		ctx.DataSocket = INVALID_SOCKET;
1889
1890
657
		pthread_mutexattr_init(&m_attr);
1891
#if defined(PTHREAD_MUTEX_RECURSIVE) || defined(__FreeBSD__)
1892
		pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE);
1893
#else
1894
657
        pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE_NP);
1895
#endif
1896
657
        pthread_mutex_init(&ctx.MTLock, &m_attr);
1897
1898
657
		ctx.CurrentDir[0] = '/';
1899
657
		sendstring(&ctx, success220);
1900
1901
		memset(&rcvbuf, 0, sizeof(rcvbuf));
1902
1903
657
		snprintf(rcvbuf, sizeof(rcvbuf), "<- New user IP=%u.%u.%u.%u:%u",
1904
				laddr.sin_addr.s_addr & 0xff,
1905
657
				(laddr.sin_addr.s_addr >> 8 ) & 0xff,
1906
657
				(laddr.sin_addr.s_addr >> 16 ) & 0xff,
1907
657
				(laddr.sin_addr.s_addr >> 24 ) & 0xff,
1908
657
				ntohs(laddr.sin_port)
1909
				);
1910
1911
657
		writelogentry(&ctx, rcvbuf, "");
1912
1913
14227
		while ( ctx.ControlSocket != INVALID_SOCKET ) {
1914
14227
			if ( !recvcmd(&ctx, rcvbuf, sizeof(rcvbuf)) )
1915
				break;
1916
1917
			i = 0;
1918

26970
			while ((rcvbuf[i] != 0) && (isalpha(rcvbuf[i]) == 0))
1919
13017
				++i;
1920
1921
13953
			cmd = &rcvbuf[i];
1922
111561
			while ((rcvbuf[i] != 0) && (rcvbuf[i] != ' '))
1923
97608
				++i;
1924
1925
13953
			cmdlen = &rcvbuf[i] - cmd;
1926
22706
			while (rcvbuf[i] == ' ')
1927
8753
				++i;
1928
1929
13953
			if (rcvbuf[i] == 0)
1930
				params = NULL;
1931
			else
1932
8080
				params = &rcvbuf[i];
1933
1934
			cmdno = -1;
1935
			rv = 1;
1936
250238
			for (c=0; c<MAX_CMDS; c++)
1937
246096
				if (strncasecmp(cmd, ftpcmds[c], cmdlen) == 0)
1938
				{
1939
					cmdno = c;
1940
9811
					rv = ftpprocs[c](&ctx, params);
1941
9809
					break;
1942
				}
1943
1944
13951
			if ( cmdno != FTP_PASSCMD_INDEX )
1945
12179
				writelogentry(&ctx, " @@ CMD: ", rcvbuf);
1946
			else
1947
1772
				writelogentry(&ctx, " @@ CMD: ", "PASS ***");
1948
1949
13951
			if ( cmdno == -1 )
1950
4142
				sendstring(&ctx, error500);
1951
1952
13951
			if ( rv <= 0 )
1953
				break;
1954
		};
1955
1956
655
		WorkerThreadCleanup(&ctx);
1957
1958
580
		pthread_mutex_destroy(&ctx.MTLock);
1959
580
		pthread_mutexattr_destroy(&m_attr);
1960
580
		writelogentry(&ctx, "User disconnected", "");
1961
580
		break;
1962
	}
1963
1964
580
	if (ctx.TLS_session != NULL)
1965
		gnutls_deinit(ctx.TLS_session);
1966
1967
580
	free(ctx.GPBuffer);
1968
580
	close(ctx.ControlSocket);
1969
580
	*s = INVALID_SOCKET;
1970
580
	return NULL;
1971
}
1972
1973
657
void *ftpmain(void *p)
1974
{
1975
	struct sockaddr_in	laddr;
1976
1977
	int		ftpsocket = INVALID_SOCKET,
1978
			clientsocket,
1979
			*scb = NULL,
1980
			socketret,
1981
			rv;
1982
1983
	socklen_t	asz;
1984
	uint32_t	i;
1985
	pthread_t	th;
1986
1987
657
	ftpsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1988
657
	if ( ftpsocket == INVALID_SOCKET )
1989
	{
1990
		printf("\r\n socket create error\r\n");
1991
		return 0;
1992
	}
1993
1994
657
	rv = 1;
1995
657
	setsockopt(ftpsocket, SOL_SOCKET, SO_REUSEADDR, &rv, sizeof(rv));
1996
1997
657
	scb = (SOCKET *)x_malloc(sizeof(SOCKET)*g_cfg.MaxUsers);
1998
7227
	for (i = 0; i<g_cfg.MaxUsers; i++)
1999
6570
		scb[i] = INVALID_SOCKET;
2000
2001
	memset(&laddr, 0, sizeof(laddr));
2002
657
	laddr.sin_family = AF_INET;
2003
657
	laddr.sin_port = htons(g_cfg.Port);
2004
657
	laddr.sin_addr.s_addr = g_cfg.BindToInterface;
2005
657
	socketret = bind(ftpsocket, (struct sockaddr *)&laddr, sizeof(laddr));
2006
657
	if  ( socketret != 0 ) {
2007
		printf("\r\n Failed to start server. Can not bind to address\r\n\r\n");
2008
		free(scb);
2009
		close(ftpsocket);
2010
		return 0;
2011
	}
2012
2013
657
	writelogentry(NULL, success220, "");
2014
2015
657
	socketret = listen(ftpsocket, SOMAXCONN);
2016
657
	while ( socketret == 0 ) {
2017
		memset(&laddr, 0, sizeof(laddr));
2018
657
		asz = sizeof(laddr);
2019
657
		clientsocket = accept(ftpsocket, (struct sockaddr *)&laddr, &asz);
2020
657
		if (clientsocket != INVALID_SOCKET) {
2021
657
			rv = -1;
2022
657
			for (i=0; i<g_cfg.MaxUsers; i++) {
2023
657
				if ( scb[i] == INVALID_SOCKET ) {
2024
2025
657
					scb[i] = clientsocket;
2026
657
					rv = pthread_create(&th, NULL, (__ptr_thread_start_routine)&ftp_client_thread, &scb[i]);
2027
657
					if ( rv != 0 )
2028
						scb[i] = INVALID_SOCKET;
2029
2030
					break;
2031
				}
2032
			}
2033
2034
657
			if ( rv != 0 ) {
2035
				sendstring_plaintext(clientsocket, NOSLOTS);
2036
				close(clientsocket);
2037
			}
2038
		}
2039
    //Terminate the main thread when the child thread terminates
2040
657
		pthread_join(th, NULL);
2041
580
    break;
2042
	}
2043
2044
580
	free(scb);
2045
580
	close(ftpsocket);
2046
2047
580
	return NULL;
2048
}