GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: ftpserv.c Lines: 633 958 66.1 %
Date: 2026-02-24 22:34:55 Branches: 336 668 50.3 %

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

11
	if (*s != 0)
40
	{
41
		/*
42
		 * don't remove root directory sign as special case
43
		 */
44



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

6
		while (s[1] != 0)
48
5
			++s;
49
50

1
		if (*s == '/')
51
			*s = 0;
52
	}
53
}
54
55
void add_last_slash(char *s)
56
{
57



3428
	if (*s != 0)
58
	{
59



38083
		while (s[1] != 0)
60
34655
			++s;
61
62



3428
		if (*s != '/')
63
		{
64
1763
			s[1] = '/';
65
1763
			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

11
	if (*s == 0)
79
		return s;
80
/*
81
 * leave root directory sign untouched
82
 */
83

1
	if (*s == '/')
84
	{
85
1
		++s;
86
		++p;
87
	}
88
89

6
	while (*s != 0) {
90

5
		if (*s == '/')
91
			p = s;
92
5
		++s;
93
	}
94
95
1
	*p = 0;
96
97
1
	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
1722
void format_path(char *input_path, char *filtered_path)
105
{
106
	char	*p0, *pnext, *fp0;
107
	size_t	sl;
108
109
1722
	if (*input_path == '/')
110
	{
111
1722
		++input_path;
112
1722
		*filtered_path = '/';
113
1722
		++filtered_path;
114
	}
115
116
	p0 = input_path;
117
	pnext = input_path;
118
	fp0 = filtered_path;
119
1722
	*fp0 = 0;
120
121
	while (1)
122
	{
123
29113
		while ((*pnext != '/') && (*pnext != 0))
124
27242
			++pnext;
125
126
1871
		sl = pnext - p0;
127
128
1871
		while (sl > 0)
129
		{
130
1165
			if (sl == 1)
131
38
				if (*p0 == '.')
132
					break;
133
134
1155
			if (sl == 2)
135

57
				if ((p0[0] == '.') && (p0[1] == '.'))
136
				{
137
					delete_last_slash(filtered_path);
138
					fp0 = filepath(filtered_path);
139
10
					if (fp0 != filtered_path)
140
					{
141
						*fp0 = '/';
142
						++fp0;
143
						*fp0 = 0;
144
					}
145
					break;
146
				}
147
148
			strncpy(fp0, p0, sl);
149
1145
			fp0 += sl;
150
1145
			if (*pnext != 0)
151
			{
152
67
				*fp0 = '/';
153
67
				++fp0;
154
			}
155
1145
			*fp0 = 0;
156
157
1145
			break;
158
		}
159
160
1871
		if (*pnext == 0)
161
			break;
162
163
149
		++pnext;
164
		p0 = pnext;
165
	}
166
1722
}
167
168
1722
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
1722
	total_len = strlen(root_dir)+strlen(current_dir);
174
1722
	if (params != NULL)
175
1099
		total_len += strlen(params);
176
177
1722
	if (total_len >= SIZE_OF_GPBUFFER)
178
		return NULL;
179
180
1722
	tmp = x_malloc(SIZE_OF_GPBUFFER);
181
182
	strcpy(result_path, root_dir);
183
	add_last_slash(result_path);
184
1722
	user_root = result_path+strlen(result_path);
185
186
	do {
187
1722
		if ( params == NULL )
188
		{
189
			strcpy(tmp, current_dir);
190
			add_last_slash(tmp);
191
			break;
192
		}
193
194
1099
		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
1722
	format_path(tmp, user_root);
204
1722
	free(tmp);
205
1722
	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
776
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
776
	switch ( context->Mode ) {
267
572
	case MODE_NORMAL:
268
572
		clientsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
269
572
		context->DataSocket = clientsocket;
270
572
		if ( clientsocket == INVALID_SOCKET )
271
			return INVALID_SOCKET;
272
273
572
		laddr.sin_family = AF_INET;
274
572
		laddr.sin_port = context->DataPort;
275
572
		laddr.sin_addr.s_addr = context->DataIPv4;
276
572
		if ( connect(clientsocket, (const struct sockaddr *)&laddr, sizeof(laddr)) == -1 ) {
277
572
			close(clientsocket);
278
572
			return INVALID_SOCKET;
279
		}
280
		break;
281
282
204
	case MODE_PASSIVE:
283
204
		asz = sizeof(laddr);
284
204
		clientsocket = accept(context->DataSocket, (struct sockaddr *)&laddr, &asz);
285
124
		close(context->DataSocket);
286
124
		context->DataSocket = clientsocket;
287
288
124
		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
15535
ssize_t sendstring(PFTPCONTEXT context, const char *Buffer)
303
{
304
15535
	size_t	l = strlen(Buffer);
305
306
15535
	if (context->TLS_session == NULL)
307
15535
		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
20979
ssize_t writeconsolestr(const char *Buffer)
339
{
340
20979
	size_t	l = strlen(Buffer);
341
342
20979
	if ( g_log != -1 )
343
20979
		write(g_log, Buffer, l);
344
345
20979
	return write(STDOUT_FILENO, Buffer, l);
346
}
347
348
20979
int writelogentry(PFTPCONTEXT context, const char *logtext1, const char *logtext2)
349
20979
{
350
20979
	char		text[SIZE_OF_GPBUFFER];
351
20979
	time_t		itm = time(NULL);
352
	struct tm	ltm;
353
354
20979
	localtime_r(&itm, &ltm);
355
356
20979
	if (context == NULL)
357
	{
358
670
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u : %s%s\r\n",
359
670
				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
20309
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u S-id=%u : %s%s\r\n",
365
20309
				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
20979
	return writeconsolestr(text);
371
}
372
373
750
void WorkerThreadCleanup(PFTPCONTEXT context)
374
{
375
	int					err;
376
750
	void				*retv = NULL;
377
378
750
	if ( context->WorkerThreadValid == 0 ) {
379
380
		/*
381
		 * trying to stop gracefully
382
		 */
383
81
		context->WorkerThreadAbort = 1;
384
81
		sleep(2);
385
386
81
		err = pthread_join(context->WorkerThreadId, &retv);
387
1
		if ( err != 0)
388
		{
389
			writelogentry(context, "Enter cancel", "");
390
			pthread_cancel(context->WorkerThreadId);
391
		}
392
393
1
		context->WorkerThreadValid = -1;
394
	}
395
396
670
	if ( context->DataSocket != INVALID_SOCKET ) {
397
392
		close(context->DataSocket);
398
392
		context->DataSocket = INVALID_SOCKET;
399
	}
400
401
670
	if ( context->File != -1 ) {
402
		close(context->File);
403
		context->File = -1;
404
	}
405
406
670
	context->DataIPv4 = 0;
407
670
	context->DataPort = 0;
408
	//writelogentry(context, "WorkerThreadCleanup complete", "");
409
670
}
410
411
871
int ftpUSER(PFTPCONTEXT context, const char *params)
412
{
413
871
	if ( params == NULL )
414
157
		return sendstring(context, error501);
415
416
714
	context->Access = FTP_ACCESS_NOT_LOGGED_IN;
417
418
	/*
419
	 * Save username in GPBuffer for next PASS command
420
	 */
421
422
714
	writelogentry(context, " USER: ", (char *)params);
423
424
714
	strcpy(context->GPBuffer, interm331);
425
714
	strcat(context->GPBuffer, params);
426
714
	strcat(context->GPBuffer, interm331_tail);
427
714
	sendstring(context, context->GPBuffer);
428
429
714
	strcpy(context->GPBuffer, params);
430
714
	return 1;
431
}
432
433
534
int ftpQUIT(PFTPCONTEXT context, const char *params)
434
{
435
534
	writelogentry(context, " QUIT", "");
436
534
	sendstring(context, success221);
437
	/*
438
	 * retrun 0 to break command processing loop
439
	 */
440
534
	return 0;
441
}
442
443
49
int ftpNOOP(PFTPCONTEXT context, const char *params)
444
{
445
49
	return sendstring(context, success200);
446
}
447
448
885
int ftpPWD(PFTPCONTEXT context, const char *params)
449
{
450
885
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
451
226
		return sendstring(context, error530);
452
453
659
	strcpy(context->GPBuffer, "257 \"");
454
659
	strcat(context->GPBuffer, context->CurrentDir);
455
659
	strcat(context->GPBuffer, "\" is a current directory.\r\n");
456
659
	return sendstring(context, context->GPBuffer);
457
}
458
459
120
int ftpTYPE(PFTPCONTEXT context, const char *params)
460
{
461
120
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
462
39
		return sendstring(context, error530);
463
464
81
	if (params == NULL)
465
21
		return sendstring(context, error501);
466
467
60
	switch (*params)
468
	{
469
21
	case 'A':
470
	case 'a':
471
21
		return sendstring(context, success200_1);
472
1
	case 'I':
473
	case 'i':
474
1
		return sendstring(context, success200_2);
475
	}
476
477
38
	return sendstring(context, error501);
478
}
479
480
1338
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
1338
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
487
270
		return sendstring(context, error530);
488
489
1068
	if ( params == NULL )
490
60
		return sendstring(context, error501);
491
492
4930
	for (c = 0; c < 4; c++) {
493
4010
		DataIP += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
494
10492
		while ( (*p >= '0') && (*p <= '9') )
495
6482
			p++;
496
4010
		if ( *p == 0 )
497
			break;
498
3922
		p++;
499
	}
500
501
2369
	for (c = 0; c < 2; c++) {
502
1917
		DataPort += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
503
6897
		while ( (*p >= '0') && (*p <= '9') )
504
4980
			p++;
505
1917
		if ( *p == 0 )
506
			break;
507
1361
		p++;
508
	}
509
510
1008
	if ( DataIP != context->ClientIPv4 )
511
453
		return sendstring(context, error501);
512
513
555
	context->DataIPv4 = DataIP;
514
555
	context->DataPort = DataPort;
515
555
	context->Mode = MODE_NORMAL;
516
517
555
	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
597
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
597
	pthread_mutex_lock(&context->MTLock);
658
597
	pthread_cleanup_push(cleanup_handler, context);
659
	ret = 0;
660
597
	TLS_datasession = NULL;
661
662
597
	clientsocket = create_datasocket(context);
663
530
	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
530
	if (TLS_datasession != NULL)
683
	{
684
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
685
		gnutls_deinit(TLS_datasession);
686
	}
687
688
530
	writelogentry(context, " LIST complete", "");
689
690
530
	if (clientsocket == INVALID_SOCKET) {
691
530
		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
530
	context->WorkerThreadValid = -1;
704
530
	pthread_cleanup_pop(0);
705
530
	pthread_mutex_unlock(&context->MTLock);
706
530
	return NULL;
707
}
708
709
909
int ftpLIST(PFTPCONTEXT context, const char *params)
710
{
711
	struct	stat	filestats;
712
	pthread_t		tid;
713
714
909
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
715
202
		return sendstring(context, error530);
716
707
	if (context->WorkerThreadValid == 0)
717
90
		return sendstring(context, error550_t);
718
719
617
	if (params != NULL)
720
	{
721

20
		if ((strcmp(params, "-a") == 0) || (strcmp(params, "-l") == 0))
722
			params = NULL;
723
	}
724
725
617
	if (finalpath(
726
617
			context->RootDir,
727
617
			context->CurrentDir,
728
			(char *)params, context->GPBuffer) == NULL)
729
		return 0;
730
731
617
	while (stat(context->GPBuffer, &filestats) == 0)
732
	{
733
597
		if ( !S_ISDIR(filestats.st_mode) )
734
			break;
735
736
597
		sendstring(context, interm150);
737
597
		writelogentry(context, " LIST", (char *)params);
738
597
		context->WorkerThreadAbort = 0;
739
740
597
		pthread_mutex_lock(&context->MTLock);
741
742
597
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&list_thread, context);
743
597
		if ( context->WorkerThreadValid == 0 )
744
597
			context->WorkerThreadId = tid;
745
		else
746
			sendstring(context, error451);
747
748
597
		pthread_mutex_unlock(&context->MTLock);
749
750
597
		return 1;
751
	}
752
753
20
	return sendstring(context, error550);
754
}
755
756
217
int ftpCDUP(PFTPCONTEXT context, const char *params)
757
{
758
217
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
759
36
		return sendstring(context, error530);
760
761
181
	if ( strcmp(context->CurrentDir, "/") == 0 )
762
180
		return sendstring(context, success250);
763
764
	delete_last_slash(context->CurrentDir);
765
	filepath(context->CurrentDir);
766
767
1
	writelogentry(context, " CDUP", "");
768
1
	return sendstring(context, success250);
769
}
770
771
92
int ftpCWD(PFTPCONTEXT context, const char *params)
772
{
773
	struct	stat	filestats;
774
	size_t			rl;
775
776
92
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
777
12
		return sendstring(context, error530);
778
779
80
	if ( params == NULL )
780
39
		return sendstring(context, error501);
781
782
41
	if (finalpath(
783
41
			context->RootDir,
784
41
			context->CurrentDir,
785
			(char *)params, context->GPBuffer) == NULL)
786
		return 0;
787
788
41
	if ( stat(context->GPBuffer, &filestats) == 0 )
789
19
		if ( S_ISDIR(filestats.st_mode) )
790
		{
791
19
			rl = strlen(context->RootDir);
792
19
			strcpy(context->CurrentDir, context->GPBuffer+rl);
793
19
			writelogentry(context, " CWD: ", context->CurrentDir);
794
19
			return sendstring(context, success250);
795
		}
796
797
22
	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
94
int ftpRETR(PFTPCONTEXT context, const char *params)
912
{
913
	struct	stat	filestats;
914
	pthread_t		tid;
915
916
94
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
917
11
		return sendstring(context, error530);
918
83
	if (context->WorkerThreadValid == 0)
919
15
		return sendstring(context, error550_t);
920
68
	if ( params == NULL )
921
11
		return sendstring(context, error501);
922
923
57
	if ( context->File != -1 ) {
924
		close(context->File);
925
		context->File = -1;
926
	}
927
928
57
	if (finalpath(
929
57
			context->RootDir,
930
57
			context->CurrentDir,
931
			(char *)params, context->GPBuffer) == NULL)
932
		return 0;
933
934
57
	while (stat(context->GPBuffer, &filestats) == 0)
935
	{
936
3
		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
57
	return sendstring(context, error550);
957
}
958
959
103
int ftpABOR(PFTPCONTEXT context, const char *params)
960
{
961
103
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
962
23
		return sendstring(context, error530);
963
964
80
	writelogentry(context, " ABORT command", NULL);
965
80
	WorkerThreadCleanup(context);
966
80
	return sendstring(context, success226);
967
}
968
969
79
int ftpDELE(PFTPCONTEXT context, const char *params)
970
{
971
79
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
972
21
		return sendstring(context, error530);
973
58
	if ( context->Access < FTP_ACCESS_FULL )
974
10
		return sendstring(context, error550_r);
975
48
	if ( params == NULL )
976
18
		return sendstring(context, error501);
977
978
30
	if (finalpath(
979
30
			context->RootDir,
980
30
			context->CurrentDir,
981
			(char *)params, context->GPBuffer) == NULL)
982
		return 0;
983
984
30
	if ( unlink(context->GPBuffer) == 0 ) {
985
		sendstring(context, success250);
986
		writelogentry(context, " DELE: ", (char *)params);
987
	}
988
	else
989
30
		sendstring(context, error550_r);
990
991
	return 1;
992
}
993
994
600
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
600
		if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1005
		{
1006
97
			sendstring(context, error530);
1007
97
			break;
1008
		}
1009
1010
503
		if ( context->WorkerThreadValid == 0 )
1011
		{
1012
107
			sendstring(context, error550_t);
1013
107
			break;
1014
		}
1015
1016
396
		if ( context->DataSocket != INVALID_SOCKET )
1017
181
			close(context->DataSocket);
1018
1019
396
		context->DataSocket = INVALID_SOCKET;
1020
1021
396
		datasocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1022
396
		if (datasocket == INVALID_SOCKET)
1023
		{
1024
			sendstring(context, error451);
1025
			break;
1026
		}
1027
1028
396
		for (c = g_cfg.PasvPortBase; c <= g_cfg.PasvPortMax; c++) {
1029
396
			clock_gettime(CLOCK_REALTIME, &rtctime);
1030
			memset(&laddr, 0, sizeof(laddr));
1031
396
			laddr.sin_family = AF_INET;
1032
396
			laddr.sin_port = htons((in_port_t)(g_cfg.PasvPortBase +
1033
				(rtctime.tv_nsec % (g_cfg.PasvPortMax-g_cfg.PasvPortBase))));
1034
396
			laddr.sin_addr.s_addr = context->ServerIPv4;
1035
396
			socketret = bind(datasocket, (struct sockaddr *)&laddr, sizeof(laddr));
1036
396
			if ( socketret == 0 )
1037
				break;
1038
		}
1039
1040
396
		if ( socketret != 0 ) {
1041
			close(datasocket);
1042
			sendstring(context, error451);
1043
			break;
1044
		}
1045
1046
396
		socketret = listen(datasocket, SOMAXCONN);
1047
396
		if (socketret != 0) {
1048
			close(datasocket);
1049
			sendstring(context, error451);
1050
			break;
1051
		}
1052
1053
396
		if ((context->ClientIPv4 & g_cfg.LocalIPMask) == (context->ServerIPv4 & g_cfg.LocalIPMask))
1054
		{
1055
396
			context->DataIPv4 = context->ServerIPv4;
1056
396
			writelogentry(context, " local client.", "");
1057
		} else {
1058
			context->DataIPv4 = g_cfg.ExternalInterface;
1059
			writelogentry(context, " nonlocal client.", "");
1060
		}
1061
1062
396
		context->DataPort = laddr.sin_port;
1063
396
		context->DataSocket = datasocket;
1064
396
		context->Mode = MODE_PASSIVE;
1065
1066
		result = 1;
1067
396
		break;
1068
	}
1069
1070
600
	return result;
1071
}
1072
1073
319
int ftpEPSV (PFTPCONTEXT context, const char *params)
1074
{
1075
319
	if (pasv(context) == 0)
1076
		return 1;
1077
1078
229
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success229,
1079
229
			ntohs(context->DataPort));
1080
1081
229
	writelogentry(context, " entering extended passive mode", "");
1082
1083
229
	return sendstring(context, context->GPBuffer);
1084
}
1085
1086
281
int ftpPASV(PFTPCONTEXT context, const char *params)
1087
{
1088
281
	if (pasv(context) == 0)
1089
		return 1;
1090
1091
167
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success227,
1092
			context->DataIPv4 & 0xff,
1093
167
			(context->DataIPv4 >> 8) & 0xff,
1094
167
			(context->DataIPv4 >> 16) & 0xff,
1095
167
			(context->DataIPv4 >> 24) & 0xff,
1096
			context->DataPort & 0xff,
1097
167
			(context->DataPort >> 8) & 0xff);
1098
1099
167
	writelogentry(context, " entering passive mode", "");
1100
1101
167
	return sendstring(context, context->GPBuffer);
1102
}
1103
1104
1817
int ftpPASS(PFTPCONTEXT context, const char *params)
1105
{
1106
	char	temptext[256];
1107
1108
1817
	if ( params == NULL )
1109
73
		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
1744
	if (!ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "pswd", temptext, sizeof(temptext)))
1117
695
		return sendstring(context, error530_r);
1118
1119

1049
	if ( (strcmp(temptext, params) == 0) || (temptext[0] == '*') )
1120
	{
1121
837
		memset(context->RootDir, 0, sizeof(context->RootDir));
1122
		memset(temptext, 0, sizeof(temptext));
1123
1124
837
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "root", context->RootDir, sizeof(context->RootDir));
1125
837
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "accs", temptext, sizeof(temptext));
1126
1127
837
		context->Access = FTP_ACCESS_NOT_LOGGED_IN;
1128
		do {
1129
1130
837
			if ( strcasecmp(temptext, "admin") == 0 ) {
1131
592
				context->Access = FTP_ACCESS_FULL;
1132
592
				break;
1133
			}
1134
1135
245
			if ( strcasecmp(temptext, "upload") == 0 ) {
1136
53
				context->Access = FTP_ACCESS_CREATENEW;
1137
53
				break;
1138
			}
1139
1140
192
			if ( strcasecmp(temptext, "readonly") == 0 ) {
1141
192
				context->Access = FTP_ACCESS_READONLY;
1142
192
				break;
1143
			}
1144
1145
			return sendstring(context, error530_b);
1146
		} while (0);
1147
1148
837
		writelogentry(context, " PASS->successful logon", "");
1149
	}
1150
	else
1151
212
		return sendstring(context, error530_r);
1152
1153
837
	return sendstring(context, success230);
1154
}
1155
1156
118
int ftpREST(PFTPCONTEXT context, const char *params)
1157
{
1158
118
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1159
25
		return sendstring(context, error530);
1160
1161
93
	if ( params == NULL )
1162
28
		return sendstring(context, error501);
1163
1164
65
	context->RestPoint = strtoull(params, NULL, 10);
1165
65
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, "%s %llu\r\n",
1166
			interm350, (unsigned long long int)context->RestPoint);
1167
1168
65
	return sendstring(context, context->GPBuffer);
1169
}
1170
1171
111
int ftpSIZE(PFTPCONTEXT context, const char *params)
1172
{
1173
	struct stat		filestats;
1174
1175
111
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1176
18
		return sendstring(context, error530);
1177
93
	if ( params == NULL )
1178
51
		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
6
		snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, "213 %llu\r\n",
1189
6
				(unsigned long long int)filestats.st_size);
1190
6
		sendstring(context, context->GPBuffer);
1191
	}
1192
	else
1193
36
		sendstring(context, error550);
1194
1195
	return 1;
1196
}
1197
1198
1026
int ftpMKD(PFTPCONTEXT context, const char *params)
1199
{
1200
1026
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1201
258
		return sendstring(context, error530);
1202
768
	if ( context->Access < FTP_ACCESS_CREATENEW )
1203
72
		return sendstring(context, error550_r);
1204
696
	if ( params == NULL )
1205
27
		return sendstring(context, error501);
1206
1207
669
	if (finalpath(
1208
669
			context->RootDir,
1209
669
			context->CurrentDir,
1210
			(char *)params, context->GPBuffer) == NULL)
1211
		return 0;
1212
1213
669
	if ( mkdir(context->GPBuffer, 0755) == 0 ) {
1214
542
		sendstring(context, success257);
1215
542
		writelogentry(context, " MKD: ", (char *)params);
1216
	}
1217
	else
1218
127
		sendstring(context, error550_r);
1219
1220
	return 1;
1221
}
1222
1223
55
int ftpRMD(PFTPCONTEXT context, const char *params)
1224
{
1225
55
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1226
17
		return sendstring(context, error530);
1227
38
	if ( context->Access < FTP_ACCESS_FULL )
1228
11
		return sendstring(context, error550_r);
1229
27
	if ( params == NULL )
1230
16
		return sendstring(context, error501);
1231
1232
11
	if (finalpath(
1233
11
			context->RootDir,
1234
11
			context->CurrentDir,
1235
			(char *)params, context->GPBuffer) == NULL)
1236
		return 0;
1237
1238
11
	if ( rmdir(context->GPBuffer) == 0 ) {
1239
1
		sendstring(context, success250);
1240
1
		writelogentry(context, " DELE: ", (char *)params);
1241
	}
1242
	else
1243
10
		sendstring(context, error550_r);
1244
1245
	return 1;
1246
}
1247
1248
153
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
153
	pthread_mutex_lock(&context->MTLock);
1259
153
	pthread_cleanup_push(cleanup_handler, context);
1260
1261
	f = -1;
1262
	sz_total = 0;
1263
	buffer = NULL;
1264
153
	TLS_datasession = NULL;
1265
153
	clock_gettime(CLOCK_MONOTONIC, &t);
1266
153
	lt0 = t.tv_sec*1e9 + t.tv_nsec;
1267
1268
153
	clientsocket = create_datasocket(context);
1269
143
	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
143
	clock_gettime(CLOCK_MONOTONIC, &t);
1298
143
	lt1 = t.tv_sec*1e9 + t.tv_nsec;
1299
1300
143
	if (f != -1)
1301
		close(f);
1302
1303
143
	context->File = -1;
1304
1305
143
	if (TLS_datasession != NULL)
1306
	{
1307
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1308
		gnutls_deinit(TLS_datasession);
1309
	}
1310
1311
	/* calculating performance */
1312
143
	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
143
	if (clientsocket == INVALID_SOCKET) {
1322
143
		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
143
	context->WorkerThreadValid = -1;
1335
143
	pthread_cleanup_pop(0);
1336
143
	pthread_mutex_unlock(&context->MTLock);
1337
143
	return NULL;
1338
}
1339
1340
297
int ftpSTOR(PFTPCONTEXT context, const char *params)
1341
{
1342
	struct	stat	filestats;
1343
	pthread_t		tid;
1344
1345
297
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1346
29
		return sendstring(context, error530);
1347
268
	if ( context->Access < FTP_ACCESS_CREATENEW )
1348
15
		return sendstring(context, error550_r);
1349
253
	if ( params == NULL )
1350
70
		return sendstring(context, error501);
1351
183
	if ( context->WorkerThreadValid == 0 )
1352
30
		return sendstring(context, error550_t);
1353
1354
153
	if ( context->File != -1 ) {
1355
		close(context->File);
1356
		context->File = -1;
1357
	}
1358
1359
153
	if (finalpath(
1360
153
			context->RootDir,
1361
153
			context->CurrentDir,
1362
			(char *)params, context->GPBuffer) == NULL)
1363
		return 0;
1364
1365
153
	if ( context->Access == FTP_ACCESS_FULL )
1366
121
		context->CreateMode = O_CREAT | O_WRONLY| O_TRUNC;
1367
	else
1368
	{
1369
32
		context->CreateMode = O_CREAT | O_WRONLY| O_EXCL;
1370
32
		if (stat(context->GPBuffer, &filestats) == 0)
1371
			return sendstring(context, error550_r);
1372
	}
1373
1374
153
	sendstring(context, interm150);
1375
153
	writelogentry(context, " STOR: ", (char *)params);
1376
153
	context->WorkerThreadAbort = 0;
1377
1378
153
	pthread_mutex_lock(&context->MTLock);
1379
1380
153
	context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&stor_thread, context);
1381
153
	if ( context->WorkerThreadValid == 0 )
1382
153
		context->WorkerThreadId = tid;
1383
	else
1384
		sendstring(context, error451);
1385
1386
153
	pthread_mutex_unlock(&context->MTLock);
1387
1388
153
	return 1;
1389
}
1390
1391
883
int ftpSYST(PFTPCONTEXT context, const char *params)
1392
{
1393
883
	return sendstring(context, success215);
1394
}
1395
1396
21
int ftpHELP(PFTPCONTEXT context, const char *params)
1397
{
1398
21
	return sendstring(context, success214);
1399
}
1400
1401
15
int ftpSITE(PFTPCONTEXT context, const char *params)
1402
{
1403
15
	if ( params != NULL )
1404
4
		if (strcasecmp(params, "help") == 0)
1405
			return sendstring(context, "200 chmod\r\n");
1406
1407
15
	return sendstring(context, error500);
1408
}
1409
1410
60
int ftpFEAT(PFTPCONTEXT context, const char *params)
1411
{
1412
60
	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
81
int ftpAPPE(PFTPCONTEXT context, const char *params)
1491
{
1492
	struct	stat	filestats;
1493
	pthread_t		tid;
1494
1495
81
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1496
14
		return sendstring(context, error530);
1497
67
	if ( context->Access < FTP_ACCESS_FULL )
1498
13
		return sendstring(context, error550_r);
1499
54
	if ( params == NULL )
1500
20
		return sendstring(context, error501);
1501
34
	if ( context->WorkerThreadValid == 0 )
1502
22
		return sendstring(context, error550_t);
1503
1504
12
	if ( context->File != -1 ) {
1505
		close(context->File);
1506
		context->File = -1;
1507
	}
1508
1509
12
	if (finalpath(
1510
12
			context->RootDir,
1511
12
			context->CurrentDir,
1512
			(char *)params, context->GPBuffer) == NULL)
1513
		return 0;
1514
1515
	/*
1516
	 * stat must NOT fail
1517
	 */
1518
12
	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
12
	return sendstring(context, error550);
1544
}
1545
1546
110
int ftpRNFR(PFTPCONTEXT context, const char *params)
1547
{
1548
	struct stat		filestats;
1549
1550
110
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1551
19
		return sendstring(context, error530);
1552
91
	if ( context->Access < FTP_ACCESS_FULL )
1553
20
		return sendstring(context, error550_r);
1554
71
	if ( params == NULL )
1555
28
		return sendstring(context, error501);
1556
1557
43
	if (finalpath(
1558
43
			context->RootDir,
1559
43
			context->CurrentDir,
1560
			(char *)params, context->GPBuffer) == NULL)
1561
		return 0;
1562
1563
43
	if ( stat(context->GPBuffer, &filestats) == 0 )
1564
	{
1565
		writelogentry(context, " RNFR: ", context->GPBuffer);
1566
		sendstring(context, interm350_ren);
1567
	}
1568
	else
1569
43
		sendstring(context, error550);
1570
1571
	return 1;
1572
}
1573
1574
79
int ftpRNTO(PFTPCONTEXT context, const char *params)
1575
{
1576
	char	*_text;
1577
1578
79
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1579
19
		return sendstring(context, error530);
1580
60
	if ( context->Access < FTP_ACCESS_FULL )
1581
13
		return sendstring(context, error550_r);
1582
47
	if ( params == NULL )
1583
29
		return sendstring(context, error501);
1584
1585
18
	_text = x_malloc(SIZE_OF_GPBUFFER);
1586
1587
18
	if (finalpath(
1588
18
			context->RootDir,
1589
18
			context->CurrentDir,
1590
			(char *)params, _text) == NULL)
1591
	{
1592
		free(_text);
1593
		return 0;
1594
	}
1595
1596
18
	if ( rename(context->GPBuffer, _text) == 0 )
1597
	{
1598
6
		writelogentry(context, " RNTO: ", _text);
1599
6
		sendstring(context, success250);
1600
	}
1601
	else
1602
12
		sendstring(context, error550);
1603
1604
18
	free(_text);
1605
18
	return 1;
1606
}
1607
1608
25
int ftpOPTS(PFTPCONTEXT context, const char *params)
1609
{
1610
25
	if ( params != NULL )
1611
8
		if (strcasecmp(params, "utf8 on") == 0)
1612
			return sendstring(context, "200 Always in UTF8 mode.\r\n");
1613
1614
25
	writelogentry(context, " unsupported OPTS: ", params);
1615
25
	return sendstring(context, error500);
1616
}
1617
1618
69
int ftpAUTH(PFTPCONTEXT context, const char *params)
1619
{
1620
69
	if ( params == NULL )
1621
31
		return sendstring(context, error501);
1622
1623
38
	if ( strcasecmp(params, "TLS") == 0 )
1624
		/* InitTLSSession will send reply */
1625
		return InitTLSSession(&context->TLS_session, context->ControlSocket, 1);
1626
	else
1627
38
		return sendstring(context, error504);
1628
}
1629
1630
91
int ftpPBSZ (PFTPCONTEXT context, const char *params)
1631
{
1632
91
	if ( params == NULL )
1633
21
		return sendstring(context, error501);
1634
1635
70
	if ( context->TLS_session == NULL )
1636
70
		return sendstring(context, error503);
1637
1638
	context->BlockSize = strtoul(params, NULL, 10);
1639
	return sendstring(context, success200);
1640
}
1641
1642
72
int ftpPROT (PFTPCONTEXT context, const char *params)
1643
{
1644
72
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1645
14
		return sendstring(context, error530);
1646
1647
58
	if ( params == NULL )
1648
24
			return sendstring(context, error501);
1649
1650
34
	if ( context->TLS_session == NULL )
1651
34
		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
26
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
26
	pthread_mutex_lock(&context->MTLock);
1730
26
	pthread_cleanup_push(cleanup_handler, context);
1731
	ret = 0;
1732
26
	TLS_datasession = NULL;
1733
1734
26
	clientsocket = create_datasocket(context);
1735
23
	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
23
	if (TLS_datasession != NULL)
1755
	{
1756
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1757
		gnutls_deinit(TLS_datasession);
1758
	}
1759
1760
23
	writelogentry(context, " LIST complete", "");
1761
1762
23
	if (clientsocket == INVALID_SOCKET) {
1763
23
		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
23
	context->WorkerThreadValid = -1;
1776
23
	pthread_cleanup_pop(0);
1777
23
	pthread_mutex_unlock(&context->MTLock);
1778
23
	return NULL;
1779
}
1780
1781
73
int ftpMLSD(PFTPCONTEXT context, const char *params)
1782
{
1783
	struct	stat	filestats;
1784
	pthread_t		tid;
1785
1786
73
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
1787
17
		return sendstring(context, error530);
1788
56
	if (context->WorkerThreadValid == 0)
1789
27
		return sendstring(context, error550_t);
1790
1791
29
	if (finalpath(
1792
29
			context->RootDir,
1793
29
			context->CurrentDir,
1794
			(char *)params, context->GPBuffer) == NULL)
1795
		return 0;
1796
1797
29
	while (stat(context->GPBuffer, &filestats) == 0)
1798
	{
1799
26
		if ( !S_ISDIR(filestats.st_mode) )
1800
			break;
1801
1802
26
		sendstring(context, interm150);
1803
26
		writelogentry(context, " MLSD-LIST ", (char *)params);
1804
26
		context->WorkerThreadAbort = 0;
1805
1806
26
		pthread_mutex_lock(&context->MTLock);
1807
1808
26
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&msld_thread, context);
1809
26
		if ( context->WorkerThreadValid == 0 )
1810
26
			context->WorkerThreadId = tid;
1811
		else
1812
			sendstring(context, error451);
1813
1814
26
		pthread_mutex_unlock(&context->MTLock);
1815
1816
26
		return 1;
1817
	}
1818
1819
3
	return sendstring(context, error550);
1820
}
1821
1822
14305
int recvcmd(PFTPCONTEXT context, char *buffer, size_t buffer_size)
1823
{
1824
	ssize_t	l, p = 0;
1825
1826
14305
	if ( buffer_size < 5 )
1827
		return 0;
1828
1829
	memset(buffer, 0, buffer_size);
1830
14305
	--buffer_size;
1831
1832
14501
	while (buffer_size > 0)
1833
	{
1834
14488
		if (context->TLS_session == NULL)
1835
14488
			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
14488
		if ( l <= 0 )
1840
			return 0;
1841
1842
14365
		buffer_size -= l;
1843
14365
		p += l;
1844
1845
14365
		if ( p >= 2 )
1846

14351
			if ( (buffer[p-2] == '\r') && (buffer[p-1] == '\n') )
1847
			{
1848
14169
				buffer[p-2] = 0;
1849
14169
				return 1;
1850
			}
1851
	}
1852
1853
	return 0;
1854
}
1855
1856
670
void *ftp_client_thread(SOCKET *s)
1857
670
{
1858
	FTPCONTEXT				ctx __attribute__ ((aligned (16)));
1859
670
	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
670
	ctx.Access = FTP_ACCESS_NOT_LOGGED_IN;
1868
670
	ctx.ControlSocket = *s;
1869
670
	ctx.GPBuffer = x_malloc(SIZE_OF_GPBUFFER);
1870
1871
	memset(&laddr, 0, sizeof(laddr));
1872
670
	asz = sizeof(laddr);
1873
670
	while ( getsockname(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) == 0 )
1874
	{
1875
670
		ctx.ServerIPv4 = laddr.sin_addr.s_addr;
1876
1877
		memset(&laddr, 0, sizeof(laddr));
1878
670
		asz = sizeof(laddr);
1879
670
		if ( getpeername(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) != 0 )
1880
			break;
1881
1882
670
		ctx.ClientIPv4 = laddr.sin_addr.s_addr;
1883
670
		ctx.Mode = MODE_NORMAL;
1884
670
		ctx.WorkerThreadAbort = 0;
1885
670
		ctx.WorkerThreadValid = -1;
1886
670
		ctx.SessionID = __sync_add_and_fetch(&g_newid, 1);
1887
670
		ctx.File = -1;
1888
670
		ctx.DataSocket = INVALID_SOCKET;
1889
1890
670
		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
670
        pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE_NP);
1895
#endif
1896
670
        pthread_mutex_init(&ctx.MTLock, &m_attr);
1897
1898
670
		ctx.CurrentDir[0] = '/';
1899
670
		sendstring(&ctx, success220);
1900
1901
		memset(&rcvbuf, 0, sizeof(rcvbuf));
1902
1903
670
		snprintf(rcvbuf, sizeof(rcvbuf), "<- New user IP=%u.%u.%u.%u:%u",
1904
				laddr.sin_addr.s_addr & 0xff,
1905
670
				(laddr.sin_addr.s_addr >> 8 ) & 0xff,
1906
670
				(laddr.sin_addr.s_addr >> 16 ) & 0xff,
1907
670
				(laddr.sin_addr.s_addr >> 24 ) & 0xff,
1908
670
				ntohs(laddr.sin_port)
1909
				);
1910
1911
670
		writelogentry(&ctx, rcvbuf, "");
1912
1913
14305
		while ( ctx.ControlSocket != INVALID_SOCKET ) {
1914
14305
			if ( !recvcmd(&ctx, rcvbuf, sizeof(rcvbuf)) )
1915
				break;
1916
1917
			i = 0;
1918

16737
			while ((rcvbuf[i] != 0) && (isalpha(rcvbuf[i]) == 0))
1919
2568
				++i;
1920
1921
14169
			cmd = &rcvbuf[i];
1922
98567
			while ((rcvbuf[i] != 0) && (rcvbuf[i] != ' '))
1923
84398
				++i;
1924
1925
14169
			cmdlen = &rcvbuf[i] - cmd;
1926
22329
			while (rcvbuf[i] == ' ')
1927
8160
				++i;
1928
1929
14169
			if (rcvbuf[i] == 0)
1930
				params = NULL;
1931
			else
1932
7143
				params = &rcvbuf[i];
1933
1934
			cmdno = -1;
1935
			rv = 1;
1936
235840
			for (c=0; c<MAX_CMDS; c++)
1937
232565
				if (strncasecmp(cmd, ftpcmds[c], cmdlen) == 0)
1938
				{
1939
					cmdno = c;
1940
10894
					rv = ftpprocs[c](&ctx, params);
1941
10894
					break;
1942
				}
1943
1944
14169
			if ( cmdno != FTP_PASSCMD_INDEX )
1945
12352
				writelogentry(&ctx, " @@ CMD: ", rcvbuf);
1946
			else
1947
1817
				writelogentry(&ctx, " @@ CMD: ", "PASS ***");
1948
1949
14169
			if ( cmdno == -1 )
1950
3275
				sendstring(&ctx, error500);
1951
1952
14169
			if ( rv <= 0 )
1953
				break;
1954
		};
1955
1956
670
		WorkerThreadCleanup(&ctx);
1957
1958
590
		pthread_mutex_destroy(&ctx.MTLock);
1959
590
		pthread_mutexattr_destroy(&m_attr);
1960
590
		writelogentry(&ctx, "User disconnected", "");
1961
590
		break;
1962
	}
1963
1964
590
	if (ctx.TLS_session != NULL)
1965
		gnutls_deinit(ctx.TLS_session);
1966
1967
590
	free(ctx.GPBuffer);
1968
590
	close(ctx.ControlSocket);
1969
590
	*s = INVALID_SOCKET;
1970
590
	return NULL;
1971
}
1972
1973
670
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
670
	ftpsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1988
670
	if ( ftpsocket == INVALID_SOCKET )
1989
	{
1990
		printf("\r\n socket create error\r\n");
1991
		return 0;
1992
	}
1993
1994
670
	rv = 1;
1995
670
	setsockopt(ftpsocket, SOL_SOCKET, SO_REUSEADDR, &rv, sizeof(rv));
1996
1997
670
	scb = (SOCKET *)x_malloc(sizeof(SOCKET)*g_cfg.MaxUsers);
1998
7370
	for (i = 0; i<g_cfg.MaxUsers; i++)
1999
6700
		scb[i] = INVALID_SOCKET;
2000
2001
	memset(&laddr, 0, sizeof(laddr));
2002
670
	laddr.sin_family = AF_INET;
2003
670
	laddr.sin_port = htons(g_cfg.Port);
2004
670
	laddr.sin_addr.s_addr = g_cfg.BindToInterface;
2005
670
	socketret = bind(ftpsocket, (struct sockaddr *)&laddr, sizeof(laddr));
2006
670
	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
670
	writelogentry(NULL, success220, "");
2014
2015
670
	socketret = listen(ftpsocket, SOMAXCONN);
2016
670
	while ( socketret == 0 ) {
2017
		memset(&laddr, 0, sizeof(laddr));
2018
670
		asz = sizeof(laddr);
2019
670
		clientsocket = accept(ftpsocket, (struct sockaddr *)&laddr, &asz);
2020
670
		if (clientsocket != INVALID_SOCKET) {
2021
670
			rv = -1;
2022
670
			for (i=0; i<g_cfg.MaxUsers; i++) {
2023
670
				if ( scb[i] == INVALID_SOCKET ) {
2024
2025
670
					scb[i] = clientsocket;
2026
670
					rv = pthread_create(&th, NULL, (__ptr_thread_start_routine)&ftp_client_thread, &scb[i]);
2027
670
					if ( rv != 0 )
2028
						scb[i] = INVALID_SOCKET;
2029
2030
					break;
2031
				}
2032
			}
2033
2034
670
			if ( rv != 0 ) {
2035
				sendstring_plaintext(clientsocket, NOSLOTS);
2036
				close(clientsocket);
2037
			}
2038
		}
2039
    //Terminate the main thread when the child thread terminates
2040
670
		pthread_join(th, NULL);
2041
590
    break;
2042
	}
2043
2044
590
	free(scb);
2045
590
	close(ftpsocket);
2046
2047
590
	return NULL;
2048
}