GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: ftpserv.c Lines: 610 958 63.7 %
Date: 2026-02-24 22:34:14 Branches: 310 668 46.4 %

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
	if (*s != 0)
40
	{
41
		/*
42
		 * don't remove root directory sign as special case
43
		 */
44
		if ((s[0] == '/') && (s[1] == 0))
45
			return;
46
47
		while (s[1] != 0)
48
			++s;
49
50
		if (*s == '/')
51
			*s = 0;
52
	}
53
}
54
55
void add_last_slash(char *s)
56
{
57



3202
	if (*s != 0)
58
	{
59



35382
		while (s[1] != 0)
60
32180
			++s;
61
62



3202
		if (*s != '/')
63
		{
64
1609
			s[1] = '/';
65
1609
			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
	if (*s == 0)
79
		return s;
80
/*
81
 * leave root directory sign untouched
82
 */
83
	if (*s == '/')
84
	{
85
		++s;
86
		++p;
87
	}
88
89
	while (*s != 0) {
90
		if (*s == '/')
91
			p = s;
92
		++s;
93
	}
94
95
	*p = 0;
96
97
	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
1609
void format_path(char *input_path, char *filtered_path)
105
{
106
	char	*p0, *pnext, *fp0;
107
	size_t	sl;
108
109
1609
	if (*input_path == '/')
110
	{
111
1609
		++input_path;
112
1609
		*filtered_path = '/';
113
1609
		++filtered_path;
114
	}
115
116
	p0 = input_path;
117
	pnext = input_path;
118
	fp0 = filtered_path;
119
1609
	*fp0 = 0;
120
121
	while (1)
122
	{
123
26179
		while ((*pnext != '/') && (*pnext != 0))
124
22567
			++pnext;
125
126
3612
		sl = pnext - p0;
127
128
3612
		while (sl > 0)
129
		{
130
1221
			if (sl == 1)
131
43
				if (*p0 == '.')
132
					break;
133
134
1220
			if (sl == 2)
135

32
				if ((p0[0] == '.') && (p0[1] == '.'))
136
				{
137
					delete_last_slash(filtered_path);
138
					fp0 = filepath(filtered_path);
139
					if (fp0 != filtered_path)
140
					{
141
						*fp0 = '/';
142
						++fp0;
143
						*fp0 = 0;
144
					}
145
					break;
146
				}
147
148
			strncpy(fp0, p0, sl);
149
1220
			fp0 += sl;
150
1220
			if (*pnext != 0)
151
			{
152
64
				*fp0 = '/';
153
64
				++fp0;
154
			}
155
1220
			*fp0 = 0;
156
157
1220
			break;
158
		}
159
160
3612
		if (*pnext == 0)
161
			break;
162
163
2003
		++pnext;
164
		p0 = pnext;
165
	}
166
1609
}
167
168
1609
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
1609
	total_len = strlen(root_dir)+strlen(current_dir);
174
1609
	if (params != NULL)
175
1157
		total_len += strlen(params);
176
177
1609
	if (total_len >= SIZE_OF_GPBUFFER)
178
		return NULL;
179
180
1609
	tmp = x_malloc(SIZE_OF_GPBUFFER);
181
182
	strcpy(result_path, root_dir);
183
	add_last_slash(result_path);
184
1609
	user_root = result_path+strlen(result_path);
185
186
	do {
187
1609
		if ( params == NULL )
188
		{
189
			strcpy(tmp, current_dir);
190
			add_last_slash(tmp);
191
			break;
192
		}
193
194
1157
		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
1609
	format_path(tmp, user_root);
204
1609
	free(tmp);
205
1609
	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
470
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
470
	switch ( context->Mode ) {
267
388
	case MODE_NORMAL:
268
388
		clientsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
269
388
		context->DataSocket = clientsocket;
270
388
		if ( clientsocket == INVALID_SOCKET )
271
			return INVALID_SOCKET;
272
273
388
		laddr.sin_family = AF_INET;
274
388
		laddr.sin_port = context->DataPort;
275
388
		laddr.sin_addr.s_addr = context->DataIPv4;
276
388
		if ( connect(clientsocket, (const struct sockaddr *)&laddr, sizeof(laddr)) == -1 ) {
277
388
			close(clientsocket);
278
388
			return INVALID_SOCKET;
279
		}
280
		break;
281
282
82
	case MODE_PASSIVE:
283
82
		asz = sizeof(laddr);
284
82
		clientsocket = accept(context->DataSocket, (struct sockaddr *)&laddr, &asz);
285
15
		close(context->DataSocket);
286
15
		context->DataSocket = clientsocket;
287
288
15
		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
14357
ssize_t sendstring(PFTPCONTEXT context, const char *Buffer)
303
{
304
14357
	size_t	l = strlen(Buffer);
305
306
14357
	if (context->TLS_session == NULL)
307
14357
		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
19183
ssize_t writeconsolestr(const char *Buffer)
339
{
340
19183
	size_t	l = strlen(Buffer);
341
342
19183
	if ( g_log != -1 )
343
19183
		write(g_log, Buffer, l);
344
345
19183
	return write(STDOUT_FILENO, Buffer, l);
346
}
347
348
19183
int writelogentry(PFTPCONTEXT context, const char *logtext1, const char *logtext2)
349
19183
{
350
19183
	char		text[SIZE_OF_GPBUFFER];
351
19183
	time_t		itm = time(NULL);
352
	struct tm	ltm;
353
354
19183
	localtime_r(&itm, &ltm);
355
356
19183
	if (context == NULL)
357
	{
358
629
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u : %s%s\r\n",
359
629
				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
18554
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u S-id=%u : %s%s\r\n",
365
18554
				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
19183
	return writeconsolestr(text);
371
}
372
373
764
void WorkerThreadCleanup(PFTPCONTEXT context)
374
{
375
	int					err;
376
764
	void				*retv = NULL;
377
378
764
	if ( context->WorkerThreadValid == 0 ) {
379
380
		/*
381
		 * trying to stop gracefully
382
		 */
383
67
		context->WorkerThreadAbort = 1;
384
67
		sleep(2);
385
386
67
		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
697
	if ( context->DataSocket != INVALID_SOCKET ) {
397
350
		close(context->DataSocket);
398
350
		context->DataSocket = INVALID_SOCKET;
399
	}
400
401
697
	if ( context->File != -1 ) {
402
		close(context->File);
403
		context->File = -1;
404
	}
405
406
697
	context->DataIPv4 = 0;
407
697
	context->DataPort = 0;
408
	//writelogentry(context, "WorkerThreadCleanup complete", "");
409
697
}
410
411
730
int ftpUSER(PFTPCONTEXT context, const char *params)
412
{
413
730
	if ( params == NULL )
414
113
		return sendstring(context, error501);
415
416
617
	context->Access = FTP_ACCESS_NOT_LOGGED_IN;
417
418
	/*
419
	 * Save username in GPBuffer for next PASS command
420
	 */
421
422
617
	writelogentry(context, " USER: ", (char *)params);
423
424
617
	strcpy(context->GPBuffer, interm331);
425
617
	strcat(context->GPBuffer, params);
426
617
	strcat(context->GPBuffer, interm331_tail);
427
617
	sendstring(context, context->GPBuffer);
428
429
617
	strcpy(context->GPBuffer, params);
430
617
	return 1;
431
}
432
433
437
int ftpQUIT(PFTPCONTEXT context, const char *params)
434
{
435
437
	writelogentry(context, " QUIT", "");
436
437
	sendstring(context, success221);
437
	/*
438
	 * retrun 0 to break command processing loop
439
	 */
440
437
	return 0;
441
}
442
443
22
int ftpNOOP(PFTPCONTEXT context, const char *params)
444
{
445
22
	return sendstring(context, success200);
446
}
447
448
800
int ftpPWD(PFTPCONTEXT context, const char *params)
449
{
450
800
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
451
225
		return sendstring(context, error530);
452
453
575
	strcpy(context->GPBuffer, "257 \"");
454
575
	strcat(context->GPBuffer, context->CurrentDir);
455
575
	strcat(context->GPBuffer, "\" is a current directory.\r\n");
456
575
	return sendstring(context, context->GPBuffer);
457
}
458
459
75
int ftpTYPE(PFTPCONTEXT context, const char *params)
460
{
461
75
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
462
24
		return sendstring(context, error530);
463
464
51
	if (params == NULL)
465
31
		return sendstring(context, error501);
466
467
20
	switch (*params)
468
	{
469
3
	case 'A':
470
	case 'a':
471
3
		return sendstring(context, success200_1);
472
1
	case 'I':
473
	case 'i':
474
1
		return sendstring(context, success200_2);
475
	}
476
477
16
	return sendstring(context, error501);
478
}
479
480
1004
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
1004
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
487
256
		return sendstring(context, error530);
488
489
748
	if ( params == NULL )
490
22
		return sendstring(context, error501);
491
492
3377
	for (c = 0; c < 4; c++) {
493
2730
		DataIP += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
494
7736
		while ( (*p >= '0') && (*p <= '9') )
495
5006
			p++;
496
2730
		if ( *p == 0 )
497
			break;
498
2651
		p++;
499
	}
500
501
1603
	for (c = 0; c < 2; c++) {
502
1367
		DataPort += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
503
6025
		while ( (*p >= '0') && (*p <= '9') )
504
4658
			p++;
505
1367
		if ( *p == 0 )
506
			break;
507
877
		p++;
508
	}
509
510
726
	if ( DataIP != context->ClientIPv4 )
511
241
		return sendstring(context, error501);
512
513
485
	context->DataIPv4 = DataIP;
514
485
	context->DataPort = DataPort;
515
485
	context->Mode = MODE_NORMAL;
516
517
485
	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
439
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
439
	pthread_mutex_lock(&context->MTLock);
658
439
	pthread_cleanup_push(cleanup_handler, context);
659
	ret = 0;
660
439
	TLS_datasession = NULL;
661
662
439
	clientsocket = create_datasocket(context);
663
380
	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
380
	if (TLS_datasession != NULL)
683
	{
684
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
685
		gnutls_deinit(TLS_datasession);
686
	}
687
688
380
	writelogentry(context, " LIST complete", "");
689
690
380
	if (clientsocket == INVALID_SOCKET) {
691
380
		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
380
	context->WorkerThreadValid = -1;
704
380
	pthread_cleanup_pop(0);
705
380
	pthread_mutex_unlock(&context->MTLock);
706
380
	return NULL;
707
}
708
709
692
int ftpLIST(PFTPCONTEXT context, const char *params)
710
{
711
	struct	stat	filestats;
712
	pthread_t		tid;
713
714
692
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
715
178
		return sendstring(context, error530);
716
514
	if (context->WorkerThreadValid == 0)
717
68
		return sendstring(context, error550_t);
718
719
446
	if (params != NULL)
720
	{
721

7
		if ((strcmp(params, "-a") == 0) || (strcmp(params, "-l") == 0))
722
			params = NULL;
723
	}
724
725
446
	if (finalpath(
726
446
			context->RootDir,
727
446
			context->CurrentDir,
728
			(char *)params, context->GPBuffer) == NULL)
729
		return 0;
730
731
446
	while (stat(context->GPBuffer, &filestats) == 0)
732
	{
733
439
		if ( !S_ISDIR(filestats.st_mode) )
734
			break;
735
736
439
		sendstring(context, interm150);
737
439
		writelogentry(context, " LIST", (char *)params);
738
439
		context->WorkerThreadAbort = 0;
739
740
439
		pthread_mutex_lock(&context->MTLock);
741
742
439
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&list_thread, context);
743
439
		if ( context->WorkerThreadValid == 0 )
744
439
			context->WorkerThreadId = tid;
745
		else
746
			sendstring(context, error451);
747
748
439
		pthread_mutex_unlock(&context->MTLock);
749
750
439
		return 1;
751
	}
752
753
7
	return sendstring(context, error550);
754
}
755
756
76
int ftpCDUP(PFTPCONTEXT context, const char *params)
757
{
758
76
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
759
12
		return sendstring(context, error530);
760
761
64
	if ( strcmp(context->CurrentDir, "/") == 0 )
762
64
		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
68
int ftpCWD(PFTPCONTEXT context, const char *params)
772
{
773
	struct	stat	filestats;
774
	size_t			rl;
775
776
68
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
777
26
		return sendstring(context, error530);
778
779
42
	if ( params == NULL )
780
10
		return sendstring(context, error501);
781
782
32
	if (finalpath(
783
32
			context->RootDir,
784
32
			context->CurrentDir,
785
			(char *)params, context->GPBuffer) == NULL)
786
		return 0;
787
788
32
	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
32
	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
86
int ftpRETR(PFTPCONTEXT context, const char *params)
912
{
913
	struct	stat	filestats;
914
	pthread_t		tid;
915
916
86
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
917
31
		return sendstring(context, error530);
918
55
	if (context->WorkerThreadValid == 0)
919
10
		return sendstring(context, error550_t);
920
45
	if ( params == NULL )
921
13
		return sendstring(context, error501);
922
923
32
	if ( context->File != -1 ) {
924
		close(context->File);
925
		context->File = -1;
926
	}
927
928
32
	if (finalpath(
929
32
			context->RootDir,
930
32
			context->CurrentDir,
931
			(char *)params, context->GPBuffer) == NULL)
932
		return 0;
933
934
32
	while (stat(context->GPBuffer, &filestats) == 0)
935
	{
936
1
		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
32
	return sendstring(context, error550);
957
}
958
959
173
int ftpABOR(PFTPCONTEXT context, const char *params)
960
{
961
173
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
962
28
		return sendstring(context, error530);
963
964
145
	writelogentry(context, " ABORT command", NULL);
965
145
	WorkerThreadCleanup(context);
966
135
	return sendstring(context, success226);
967
}
968
969
62
int ftpDELE(PFTPCONTEXT context, const char *params)
970
{
971
62
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
972
20
		return sendstring(context, error530);
973
42
	if ( context->Access < FTP_ACCESS_FULL )
974
9
		return sendstring(context, error550_r);
975
33
	if ( params == NULL )
976
11
		return sendstring(context, error501);
977
978
22
	if (finalpath(
979
22
			context->RootDir,
980
22
			context->CurrentDir,
981
			(char *)params, context->GPBuffer) == NULL)
982
		return 0;
983
984
22
	if ( unlink(context->GPBuffer) == 0 ) {
985
		sendstring(context, success250);
986
		writelogentry(context, " DELE: ", (char *)params);
987
	}
988
	else
989
22
		sendstring(context, error550_r);
990
991
	return 1;
992
}
993
994
408
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
408
		if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1005
		{
1006
64
			sendstring(context, error530);
1007
64
			break;
1008
		}
1009
1010
344
		if ( context->WorkerThreadValid == 0 )
1011
		{
1012
54
			sendstring(context, error550_t);
1013
54
			break;
1014
		}
1015
1016
290
		if ( context->DataSocket != INVALID_SOCKET )
1017
125
			close(context->DataSocket);
1018
1019
290
		context->DataSocket = INVALID_SOCKET;
1020
1021
290
		datasocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1022
290
		if (datasocket == INVALID_SOCKET)
1023
		{
1024
			sendstring(context, error451);
1025
			break;
1026
		}
1027
1028
290
		for (c = g_cfg.PasvPortBase; c <= g_cfg.PasvPortMax; c++) {
1029
290
			clock_gettime(CLOCK_REALTIME, &rtctime);
1030
			memset(&laddr, 0, sizeof(laddr));
1031
290
			laddr.sin_family = AF_INET;
1032
290
			laddr.sin_port = htons((in_port_t)(g_cfg.PasvPortBase +
1033
				(rtctime.tv_nsec % (g_cfg.PasvPortMax-g_cfg.PasvPortBase))));
1034
290
			laddr.sin_addr.s_addr = context->ServerIPv4;
1035
290
			socketret = bind(datasocket, (struct sockaddr *)&laddr, sizeof(laddr));
1036
290
			if ( socketret == 0 )
1037
				break;
1038
		}
1039
1040
290
		if ( socketret != 0 ) {
1041
			close(datasocket);
1042
			sendstring(context, error451);
1043
			break;
1044
		}
1045
1046
290
		socketret = listen(datasocket, SOMAXCONN);
1047
290
		if (socketret != 0) {
1048
			close(datasocket);
1049
			sendstring(context, error451);
1050
			break;
1051
		}
1052
1053
290
		if ((context->ClientIPv4 & g_cfg.LocalIPMask) == (context->ServerIPv4 & g_cfg.LocalIPMask))
1054
		{
1055
290
			context->DataIPv4 = context->ServerIPv4;
1056
290
			writelogentry(context, " local client.", "");
1057
		} else {
1058
			context->DataIPv4 = g_cfg.ExternalInterface;
1059
			writelogentry(context, " nonlocal client.", "");
1060
		}
1061
1062
290
		context->DataPort = laddr.sin_port;
1063
290
		context->DataSocket = datasocket;
1064
290
		context->Mode = MODE_PASSIVE;
1065
1066
		result = 1;
1067
290
		break;
1068
	}
1069
1070
408
	return result;
1071
}
1072
1073
118
int ftpEPSV (PFTPCONTEXT context, const char *params)
1074
{
1075
118
	if (pasv(context) == 0)
1076
		return 1;
1077
1078
85
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success229,
1079
85
			ntohs(context->DataPort));
1080
1081
85
	writelogentry(context, " entering extended passive mode", "");
1082
1083
85
	return sendstring(context, context->GPBuffer);
1084
}
1085
1086
290
int ftpPASV(PFTPCONTEXT context, const char *params)
1087
{
1088
290
	if (pasv(context) == 0)
1089
		return 1;
1090
1091
205
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success227,
1092
			context->DataIPv4 & 0xff,
1093
205
			(context->DataIPv4 >> 8) & 0xff,
1094
205
			(context->DataIPv4 >> 16) & 0xff,
1095
205
			(context->DataIPv4 >> 24) & 0xff,
1096
			context->DataPort & 0xff,
1097
205
			(context->DataPort >> 8) & 0xff);
1098
1099
205
	writelogentry(context, " entering passive mode", "");
1100
1101
205
	return sendstring(context, context->GPBuffer);
1102
}
1103
1104
1365
int ftpPASS(PFTPCONTEXT context, const char *params)
1105
{
1106
	char	temptext[256];
1107
1108
1365
	if ( params == NULL )
1109
18
		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
1347
	if (!ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "pswd", temptext, sizeof(temptext)))
1117
547
		return sendstring(context, error530_r);
1118
1119

800
	if ( (strcmp(temptext, params) == 0) || (temptext[0] == '*') )
1120
	{
1121
734
		memset(context->RootDir, 0, sizeof(context->RootDir));
1122
		memset(temptext, 0, sizeof(temptext));
1123
1124
734
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "root", context->RootDir, sizeof(context->RootDir));
1125
734
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "accs", temptext, sizeof(temptext));
1126
1127
734
		context->Access = FTP_ACCESS_NOT_LOGGED_IN;
1128
		do {
1129
1130
734
			if ( strcasecmp(temptext, "admin") == 0 ) {
1131
554
				context->Access = FTP_ACCESS_FULL;
1132
554
				break;
1133
			}
1134
1135
180
			if ( strcasecmp(temptext, "upload") == 0 ) {
1136
70
				context->Access = FTP_ACCESS_CREATENEW;
1137
70
				break;
1138
			}
1139
1140
110
			if ( strcasecmp(temptext, "readonly") == 0 ) {
1141
110
				context->Access = FTP_ACCESS_READONLY;
1142
110
				break;
1143
			}
1144
1145
			return sendstring(context, error530_b);
1146
		} while (0);
1147
1148
734
		writelogentry(context, " PASS->successful logon", "");
1149
	}
1150
	else
1151
66
		return sendstring(context, error530_r);
1152
1153
734
	return sendstring(context, success230);
1154
}
1155
1156
81
int ftpREST(PFTPCONTEXT context, const char *params)
1157
{
1158
81
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1159
23
		return sendstring(context, error530);
1160
1161
58
	if ( params == NULL )
1162
8
		return sendstring(context, error501);
1163
1164
50
	context->RestPoint = strtoull(params, NULL, 10);
1165
50
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, "%s %llu\r\n",
1166
			interm350, (unsigned long long int)context->RestPoint);
1167
1168
50
	return sendstring(context, context->GPBuffer);
1169
}
1170
1171
150
int ftpSIZE(PFTPCONTEXT context, const char *params)
1172
{
1173
	struct stat		filestats;
1174
1175
150
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1176
28
		return sendstring(context, error530);
1177
122
	if ( params == NULL )
1178
104
		return sendstring(context, error501);
1179
1180
18
	if (finalpath(
1181
18
			context->RootDir,
1182
18
			context->CurrentDir,
1183
			(char *)params, context->GPBuffer) == NULL)
1184
		return 0;
1185
1186
18
	if ( stat(context->GPBuffer, &filestats) == 0 )
1187
	{
1188
1
		snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, "213 %llu\r\n",
1189
1
				(unsigned long long int)filestats.st_size);
1190
1
		sendstring(context, context->GPBuffer);
1191
	}
1192
	else
1193
17
		sendstring(context, error550);
1194
1195
	return 1;
1196
}
1197
1198
951
int ftpMKD(PFTPCONTEXT context, const char *params)
1199
{
1200
951
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1201
240
		return sendstring(context, error530);
1202
711
	if ( context->Access < FTP_ACCESS_CREATENEW )
1203
49
		return sendstring(context, error550_r);
1204
662
	if ( params == NULL )
1205
15
		return sendstring(context, error501);
1206
1207
647
	if (finalpath(
1208
647
			context->RootDir,
1209
647
			context->CurrentDir,
1210
			(char *)params, context->GPBuffer) == NULL)
1211
		return 0;
1212
1213
647
	if ( mkdir(context->GPBuffer, 0755) == 0 ) {
1214
559
		sendstring(context, success257);
1215
559
		writelogentry(context, " MKD: ", (char *)params);
1216
	}
1217
	else
1218
88
		sendstring(context, error550_r);
1219
1220
	return 1;
1221
}
1222
1223
69
int ftpRMD(PFTPCONTEXT context, const char *params)
1224
{
1225
69
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1226
18
		return sendstring(context, error530);
1227
51
	if ( context->Access < FTP_ACCESS_FULL )
1228
12
		return sendstring(context, error550_r);
1229
39
	if ( params == NULL )
1230
10
		return sendstring(context, error501);
1231
1232
29
	if (finalpath(
1233
29
			context->RootDir,
1234
29
			context->CurrentDir,
1235
			(char *)params, context->GPBuffer) == NULL)
1236
		return 0;
1237
1238
29
	if ( rmdir(context->GPBuffer) == 0 ) {
1239
		sendstring(context, success250);
1240
		writelogentry(context, " DELE: ", (char *)params);
1241
	}
1242
	else
1243
29
		sendstring(context, error550_r);
1244
1245
	return 1;
1246
}
1247
1248
18
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
18
	pthread_mutex_lock(&context->MTLock);
1259
18
	pthread_cleanup_push(cleanup_handler, context);
1260
1261
	f = -1;
1262
	sz_total = 0;
1263
	buffer = NULL;
1264
18
	TLS_datasession = NULL;
1265
18
	clock_gettime(CLOCK_MONOTONIC, &t);
1266
18
	lt0 = t.tv_sec*1e9 + t.tv_nsec;
1267
1268
18
	clientsocket = create_datasocket(context);
1269
13
	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
13
	clock_gettime(CLOCK_MONOTONIC, &t);
1298
13
	lt1 = t.tv_sec*1e9 + t.tv_nsec;
1299
1300
13
	if (f != -1)
1301
		close(f);
1302
1303
13
	context->File = -1;
1304
1305
13
	if (TLS_datasession != NULL)
1306
	{
1307
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1308
		gnutls_deinit(TLS_datasession);
1309
	}
1310
1311
	/* calculating performance */
1312
13
	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
13
	if (clientsocket == INVALID_SOCKET) {
1322
13
		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
13
	context->WorkerThreadValid = -1;
1335
13
	pthread_cleanup_pop(0);
1336
13
	pthread_mutex_unlock(&context->MTLock);
1337
13
	return NULL;
1338
}
1339
1340
87
int ftpSTOR(PFTPCONTEXT context, const char *params)
1341
{
1342
	struct	stat	filestats;
1343
	pthread_t		tid;
1344
1345
87
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1346
26
		return sendstring(context, error530);
1347
61
	if ( context->Access < FTP_ACCESS_CREATENEW )
1348
12
		return sendstring(context, error550_r);
1349
49
	if ( params == NULL )
1350
14
		return sendstring(context, error501);
1351
35
	if ( context->WorkerThreadValid == 0 )
1352
17
		return sendstring(context, error550_t);
1353
1354
18
	if ( context->File != -1 ) {
1355
		close(context->File);
1356
		context->File = -1;
1357
	}
1358
1359
18
	if (finalpath(
1360
18
			context->RootDir,
1361
18
			context->CurrentDir,
1362
			(char *)params, context->GPBuffer) == NULL)
1363
		return 0;
1364
1365
18
	if ( context->Access == FTP_ACCESS_FULL )
1366
12
		context->CreateMode = O_CREAT | O_WRONLY| O_TRUNC;
1367
	else
1368
	{
1369
6
		context->CreateMode = O_CREAT | O_WRONLY| O_EXCL;
1370
6
		if (stat(context->GPBuffer, &filestats) == 0)
1371
			return sendstring(context, error550_r);
1372
	}
1373
1374
18
	sendstring(context, interm150);
1375
18
	writelogentry(context, " STOR: ", (char *)params);
1376
18
	context->WorkerThreadAbort = 0;
1377
1378
18
	pthread_mutex_lock(&context->MTLock);
1379
1380
18
	context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&stor_thread, context);
1381
18
	if ( context->WorkerThreadValid == 0 )
1382
18
		context->WorkerThreadId = tid;
1383
	else
1384
		sendstring(context, error451);
1385
1386
18
	pthread_mutex_unlock(&context->MTLock);
1387
1388
18
	return 1;
1389
}
1390
1391
962
int ftpSYST(PFTPCONTEXT context, const char *params)
1392
{
1393
962
	return sendstring(context, success215);
1394
}
1395
1396
55
int ftpHELP(PFTPCONTEXT context, const char *params)
1397
{
1398
55
	return sendstring(context, success214);
1399
}
1400
1401
10
int ftpSITE(PFTPCONTEXT context, const char *params)
1402
{
1403
10
	if ( params != NULL )
1404
3
		if (strcasecmp(params, "help") == 0)
1405
			return sendstring(context, "200 chmod\r\n");
1406
1407
10
	return sendstring(context, error500);
1408
}
1409
1410
19
int ftpFEAT(PFTPCONTEXT context, const char *params)
1411
{
1412
19
	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
394
int ftpAPPE(PFTPCONTEXT context, const char *params)
1491
{
1492
	struct	stat	filestats;
1493
	pthread_t		tid;
1494
1495
394
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1496
51
		return sendstring(context, error530);
1497
343
	if ( context->Access < FTP_ACCESS_FULL )
1498
65
		return sendstring(context, error550_r);
1499
278
	if ( params == NULL )
1500
18
		return sendstring(context, error501);
1501
260
	if ( context->WorkerThreadValid == 0 )
1502
15
		return sendstring(context, error550_t);
1503
1504
245
	if ( context->File != -1 ) {
1505
		close(context->File);
1506
		context->File = -1;
1507
	}
1508
1509
245
	if (finalpath(
1510
245
			context->RootDir,
1511
245
			context->CurrentDir,
1512
			(char *)params, context->GPBuffer) == NULL)
1513
		return 0;
1514
1515
	/*
1516
	 * stat must NOT fail
1517
	 */
1518
245
	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
245
	return sendstring(context, error550);
1544
}
1545
1546
108
int ftpRNFR(PFTPCONTEXT context, const char *params)
1547
{
1548
	struct stat		filestats;
1549
1550
108
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1551
18
		return sendstring(context, error530);
1552
90
	if ( context->Access < FTP_ACCESS_FULL )
1553
18
		return sendstring(context, error550_r);
1554
72
	if ( params == NULL )
1555
20
		return sendstring(context, error501);
1556
1557
52
	if (finalpath(
1558
52
			context->RootDir,
1559
52
			context->CurrentDir,
1560
			(char *)params, context->GPBuffer) == NULL)
1561
		return 0;
1562
1563
52
	if ( stat(context->GPBuffer, &filestats) == 0 )
1564
	{
1565
9
		writelogentry(context, " RNFR: ", context->GPBuffer);
1566
9
		sendstring(context, interm350_ren);
1567
	}
1568
	else
1569
43
		sendstring(context, error550);
1570
1571
	return 1;
1572
}
1573
1574
89
int ftpRNTO(PFTPCONTEXT context, const char *params)
1575
{
1576
	char	*_text;
1577
1578
89
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1579
15
		return sendstring(context, error530);
1580
74
	if ( context->Access < FTP_ACCESS_FULL )
1581
13
		return sendstring(context, error550_r);
1582
61
	if ( params == NULL )
1583
9
		return sendstring(context, error501);
1584
1585
52
	_text = x_malloc(SIZE_OF_GPBUFFER);
1586
1587
52
	if (finalpath(
1588
52
			context->RootDir,
1589
52
			context->CurrentDir,
1590
			(char *)params, _text) == NULL)
1591
	{
1592
		free(_text);
1593
		return 0;
1594
	}
1595
1596
52
	if ( rename(context->GPBuffer, _text) == 0 )
1597
	{
1598
26
		writelogentry(context, " RNTO: ", _text);
1599
26
		sendstring(context, success250);
1600
	}
1601
	else
1602
26
		sendstring(context, error550);
1603
1604
52
	free(_text);
1605
52
	return 1;
1606
}
1607
1608
71
int ftpOPTS(PFTPCONTEXT context, const char *params)
1609
{
1610
71
	if ( params != NULL )
1611
32
		if (strcasecmp(params, "utf8 on") == 0)
1612
			return sendstring(context, "200 Always in UTF8 mode.\r\n");
1613
1614
71
	writelogentry(context, " unsupported OPTS: ", params);
1615
71
	return sendstring(context, error500);
1616
}
1617
1618
62
int ftpAUTH(PFTPCONTEXT context, const char *params)
1619
{
1620
62
	if ( params == NULL )
1621
18
		return sendstring(context, error501);
1622
1623
44
	if ( strcasecmp(params, "TLS") == 0 )
1624
		/* InitTLSSession will send reply */
1625
		return InitTLSSession(&context->TLS_session, context->ControlSocket, 1);
1626
	else
1627
44
		return sendstring(context, error504);
1628
}
1629
1630
50
int ftpPBSZ (PFTPCONTEXT context, const char *params)
1631
{
1632
50
	if ( params == NULL )
1633
6
		return sendstring(context, error501);
1634
1635
44
	if ( context->TLS_session == NULL )
1636
44
		return sendstring(context, error503);
1637
1638
	context->BlockSize = strtoul(params, NULL, 10);
1639
	return sendstring(context, success200);
1640
}
1641
1642
71
int ftpPROT (PFTPCONTEXT context, const char *params)
1643
{
1644
71
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1645
16
		return sendstring(context, error530);
1646
1647
55
	if ( params == NULL )
1648
12
			return sendstring(context, error501);
1649
1650
43
	if ( context->TLS_session == NULL )
1651
43
		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
13
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
13
	pthread_mutex_lock(&context->MTLock);
1730
13
	pthread_cleanup_push(cleanup_handler, context);
1731
	ret = 0;
1732
13
	TLS_datasession = NULL;
1733
1734
13
	clientsocket = create_datasocket(context);
1735
10
	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
10
	if (TLS_datasession != NULL)
1755
	{
1756
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1757
		gnutls_deinit(TLS_datasession);
1758
	}
1759
1760
10
	writelogentry(context, " LIST complete", "");
1761
1762
10
	if (clientsocket == INVALID_SOCKET) {
1763
10
		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
10
	context->WorkerThreadValid = -1;
1776
10
	pthread_cleanup_pop(0);
1777
10
	pthread_mutex_unlock(&context->MTLock);
1778
10
	return NULL;
1779
}
1780
1781
42
int ftpMLSD(PFTPCONTEXT context, const char *params)
1782
{
1783
	struct	stat	filestats;
1784
	pthread_t		tid;
1785
1786
42
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
1787
14
		return sendstring(context, error530);
1788
28
	if (context->WorkerThreadValid == 0)
1789
12
		return sendstring(context, error550_t);
1790
1791
16
	if (finalpath(
1792
16
			context->RootDir,
1793
16
			context->CurrentDir,
1794
			(char *)params, context->GPBuffer) == NULL)
1795
		return 0;
1796
1797
16
	while (stat(context->GPBuffer, &filestats) == 0)
1798
	{
1799
13
		if ( !S_ISDIR(filestats.st_mode) )
1800
			break;
1801
1802
13
		sendstring(context, interm150);
1803
13
		writelogentry(context, " MLSD-LIST ", (char *)params);
1804
13
		context->WorkerThreadAbort = 0;
1805
1806
13
		pthread_mutex_lock(&context->MTLock);
1807
1808
13
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&msld_thread, context);
1809
13
		if ( context->WorkerThreadValid == 0 )
1810
13
			context->WorkerThreadId = tid;
1811
		else
1812
			sendstring(context, error451);
1813
1814
13
		pthread_mutex_unlock(&context->MTLock);
1815
1816
13
		return 1;
1817
	}
1818
1819
3
	return sendstring(context, error550);
1820
}
1821
1822
13517
int recvcmd(PFTPCONTEXT context, char *buffer, size_t buffer_size)
1823
{
1824
	ssize_t	l, p = 0;
1825
1826
13517
	if ( buffer_size < 5 )
1827
		return 0;
1828
1829
	memset(buffer, 0, buffer_size);
1830
13517
	--buffer_size;
1831
1832
13776
	while (buffer_size > 0)
1833
	{
1834
13774
		if (context->TLS_session == NULL)
1835
13774
			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
13774
		if ( l <= 0 )
1840
			return 0;
1841
1842
13594
		buffer_size -= l;
1843
13594
		p += l;
1844
1845
13594
		if ( p >= 2 )
1846

13581
			if ( (buffer[p-2] == '\r') && (buffer[p-1] == '\n') )
1847
			{
1848
13335
				buffer[p-2] = 0;
1849
13335
				return 1;
1850
			}
1851
	}
1852
1853
	return 0;
1854
}
1855
1856
629
void *ftp_client_thread(SOCKET *s)
1857
629
{
1858
	FTPCONTEXT				ctx __attribute__ ((aligned (16)));
1859
629
	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
629
	ctx.Access = FTP_ACCESS_NOT_LOGGED_IN;
1868
629
	ctx.ControlSocket = *s;
1869
629
	ctx.GPBuffer = x_malloc(SIZE_OF_GPBUFFER);
1870
1871
	memset(&laddr, 0, sizeof(laddr));
1872
629
	asz = sizeof(laddr);
1873
629
	while ( getsockname(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) == 0 )
1874
	{
1875
629
		ctx.ServerIPv4 = laddr.sin_addr.s_addr;
1876
1877
		memset(&laddr, 0, sizeof(laddr));
1878
629
		asz = sizeof(laddr);
1879
629
		if ( getpeername(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) != 0 )
1880
			break;
1881
1882
629
		ctx.ClientIPv4 = laddr.sin_addr.s_addr;
1883
629
		ctx.Mode = MODE_NORMAL;
1884
629
		ctx.WorkerThreadAbort = 0;
1885
629
		ctx.WorkerThreadValid = -1;
1886
629
		ctx.SessionID = __sync_add_and_fetch(&g_newid, 1);
1887
629
		ctx.File = -1;
1888
629
		ctx.DataSocket = INVALID_SOCKET;
1889
1890
629
		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
629
        pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE_NP);
1895
#endif
1896
629
        pthread_mutex_init(&ctx.MTLock, &m_attr);
1897
1898
629
		ctx.CurrentDir[0] = '/';
1899
629
		sendstring(&ctx, success220);
1900
1901
		memset(&rcvbuf, 0, sizeof(rcvbuf));
1902
1903
629
		snprintf(rcvbuf, sizeof(rcvbuf), "<- New user IP=%u.%u.%u.%u:%u",
1904
				laddr.sin_addr.s_addr & 0xff,
1905
629
				(laddr.sin_addr.s_addr >> 8 ) & 0xff,
1906
629
				(laddr.sin_addr.s_addr >> 16 ) & 0xff,
1907
629
				(laddr.sin_addr.s_addr >> 24 ) & 0xff,
1908
629
				ntohs(laddr.sin_port)
1909
				);
1910
1911
629
		writelogentry(&ctx, rcvbuf, "");
1912
1913
13517
		while ( ctx.ControlSocket != INVALID_SOCKET ) {
1914
13517
			if ( !recvcmd(&ctx, rcvbuf, sizeof(rcvbuf)) )
1915
				break;
1916
1917
			i = 0;
1918

20078
			while ((rcvbuf[i] != 0) && (isalpha(rcvbuf[i]) == 0))
1919
6743
				++i;
1920
1921
13335
			cmd = &rcvbuf[i];
1922
99665
			while ((rcvbuf[i] != 0) && (rcvbuf[i] != ' '))
1923
86330
				++i;
1924
1925
13335
			cmdlen = &rcvbuf[i] - cmd;
1926
22268
			while (rcvbuf[i] == ' ')
1927
8933
				++i;
1928
1929
13335
			if (rcvbuf[i] == 0)
1930
				params = NULL;
1931
			else
1932
7283
				params = &rcvbuf[i];
1933
1934
			cmdno = -1;
1935
			rv = 1;
1936
247067
			for (c=0; c<MAX_CMDS; c++)
1937
243001
				if (strncasecmp(cmd, ftpcmds[c], cmdlen) == 0)
1938
				{
1939
					cmdno = c;
1940
9269
					rv = ftpprocs[c](&ctx, params);
1941
9259
					break;
1942
				}
1943
1944
13325
			if ( cmdno != FTP_PASSCMD_INDEX )
1945
11960
				writelogentry(&ctx, " @@ CMD: ", rcvbuf);
1946
			else
1947
1365
				writelogentry(&ctx, " @@ CMD: ", "PASS ***");
1948
1949
13325
			if ( cmdno == -1 )
1950
4066
				sendstring(&ctx, error500);
1951
1952
13325
			if ( rv <= 0 )
1953
				break;
1954
		};
1955
1956
619
		WorkerThreadCleanup(&ctx);
1957
1958
562
		pthread_mutex_destroy(&ctx.MTLock);
1959
562
		pthread_mutexattr_destroy(&m_attr);
1960
562
		writelogentry(&ctx, "User disconnected", "");
1961
562
		break;
1962
	}
1963
1964
562
	if (ctx.TLS_session != NULL)
1965
		gnutls_deinit(ctx.TLS_session);
1966
1967
562
	free(ctx.GPBuffer);
1968
562
	close(ctx.ControlSocket);
1969
562
	*s = INVALID_SOCKET;
1970
562
	return NULL;
1971
}
1972
1973
629
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
629
	ftpsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1988
629
	if ( ftpsocket == INVALID_SOCKET )
1989
	{
1990
		printf("\r\n socket create error\r\n");
1991
		return 0;
1992
	}
1993
1994
629
	rv = 1;
1995
629
	setsockopt(ftpsocket, SOL_SOCKET, SO_REUSEADDR, &rv, sizeof(rv));
1996
1997
629
	scb = (SOCKET *)x_malloc(sizeof(SOCKET)*g_cfg.MaxUsers);
1998
6919
	for (i = 0; i<g_cfg.MaxUsers; i++)
1999
6290
		scb[i] = INVALID_SOCKET;
2000
2001
	memset(&laddr, 0, sizeof(laddr));
2002
629
	laddr.sin_family = AF_INET;
2003
629
	laddr.sin_port = htons(g_cfg.Port);
2004
629
	laddr.sin_addr.s_addr = g_cfg.BindToInterface;
2005
629
	socketret = bind(ftpsocket, (struct sockaddr *)&laddr, sizeof(laddr));
2006
629
	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
629
	writelogentry(NULL, success220, "");
2014
2015
629
	socketret = listen(ftpsocket, SOMAXCONN);
2016
629
	while ( socketret == 0 ) {
2017
		memset(&laddr, 0, sizeof(laddr));
2018
629
		asz = sizeof(laddr);
2019
629
		clientsocket = accept(ftpsocket, (struct sockaddr *)&laddr, &asz);
2020
629
		if (clientsocket != INVALID_SOCKET) {
2021
629
			rv = -1;
2022
629
			for (i=0; i<g_cfg.MaxUsers; i++) {
2023
629
				if ( scb[i] == INVALID_SOCKET ) {
2024
2025
629
					scb[i] = clientsocket;
2026
629
					rv = pthread_create(&th, NULL, (__ptr_thread_start_routine)&ftp_client_thread, &scb[i]);
2027
629
					if ( rv != 0 )
2028
						scb[i] = INVALID_SOCKET;
2029
2030
					break;
2031
				}
2032
			}
2033
2034
629
			if ( rv != 0 ) {
2035
				sendstring_plaintext(clientsocket, NOSLOTS);
2036
				close(clientsocket);
2037
			}
2038
		}
2039
    //Terminate the main thread when the child thread terminates
2040
629
		pthread_join(th, NULL);
2041
562
    break;
2042
	}
2043
2044
562
	free(scb);
2045
562
	close(ftpsocket);
2046
2047
562
	return NULL;
2048
}