GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: ftpserv.c Lines: 609 958 63.6 %
Date: 2026-02-24 22:34:36 Branches: 313 668 46.9 %

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



2965
	if (*s != 0)
58
	{
59



33185
		while (s[1] != 0)
60
30220
			++s;
61
62



2965
		if (*s != '/')
63
		{
64
1511
			s[1] = '/';
65
1511
			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
1511
void format_path(char *input_path, char *filtered_path)
105
{
106
	char	*p0, *pnext, *fp0;
107
	size_t	sl;
108
109
1511
	if (*input_path == '/')
110
	{
111
1511
		++input_path;
112
1511
		*filtered_path = '/';
113
1511
		++filtered_path;
114
	}
115
116
	p0 = input_path;
117
	pnext = input_path;
118
	fp0 = filtered_path;
119
1511
	*fp0 = 0;
120
121
	while (1)
122
	{
123
27370
		while ((*pnext != '/') && (*pnext != 0))
124
16154
			++pnext;
125
126
11216
		sl = pnext - p0;
127
128
11216
		while (sl > 0)
129
		{
130
1373
			if (sl == 1)
131
271
				if (*p0 == '.')
132
					break;
133
134
1366
			if (sl == 2)
135

74
				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
1366
			fp0 += sl;
150
1366
			if (*pnext != 0)
151
			{
152
407
				*fp0 = '/';
153
407
				++fp0;
154
			}
155
1366
			*fp0 = 0;
156
157
1366
			break;
158
		}
159
160
11216
		if (*pnext == 0)
161
			break;
162
163
9705
		++pnext;
164
		p0 = pnext;
165
	}
166
1511
}
167
168
1511
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
1511
	total_len = strlen(root_dir)+strlen(current_dir);
174
1511
	if (params != NULL)
175
1002
		total_len += strlen(params);
176
177
1511
	if (total_len >= SIZE_OF_GPBUFFER)
178
		return NULL;
179
180
1511
	tmp = x_malloc(SIZE_OF_GPBUFFER);
181
182
	strcpy(result_path, root_dir);
183
	add_last_slash(result_path);
184
1511
	user_root = result_path+strlen(result_path);
185
186
	do {
187
1511
		if ( params == NULL )
188
		{
189
			strcpy(tmp, current_dir);
190
			add_last_slash(tmp);
191
			break;
192
		}
193
194
1002
		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
1511
	format_path(tmp, user_root);
204
1511
	free(tmp);
205
1511
	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
541
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
541
	switch ( context->Mode ) {
267
460
	case MODE_NORMAL:
268
460
		clientsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
269
460
		context->DataSocket = clientsocket;
270
460
		if ( clientsocket == INVALID_SOCKET )
271
			return INVALID_SOCKET;
272
273
460
		laddr.sin_family = AF_INET;
274
460
		laddr.sin_port = context->DataPort;
275
460
		laddr.sin_addr.s_addr = context->DataIPv4;
276
460
		if ( connect(clientsocket, (const struct sockaddr *)&laddr, sizeof(laddr)) == -1 ) {
277
460
			close(clientsocket);
278
460
			return INVALID_SOCKET;
279
		}
280
		break;
281
282
81
	case MODE_PASSIVE:
283
81
		asz = sizeof(laddr);
284
81
		clientsocket = accept(context->DataSocket, (struct sockaddr *)&laddr, &asz);
285
10
		close(context->DataSocket);
286
10
		context->DataSocket = clientsocket;
287
288
10
		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
15834
ssize_t sendstring(PFTPCONTEXT context, const char *Buffer)
303
{
304
15834
	size_t	l = strlen(Buffer);
305
306
15834
	if (context->TLS_session == NULL)
307
15834
		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
21098
ssize_t writeconsolestr(const char *Buffer)
339
{
340
21098
	size_t	l = strlen(Buffer);
341
342
21098
	if ( g_log != -1 )
343
21098
		write(g_log, Buffer, l);
344
345
21098
	return write(STDOUT_FILENO, Buffer, l);
346
}
347
348
21098
int writelogentry(PFTPCONTEXT context, const char *logtext1, const char *logtext2)
349
21098
{
350
21098
	char		text[SIZE_OF_GPBUFFER];
351
21098
	time_t		itm = time(NULL);
352
	struct tm	ltm;
353
354
21098
	localtime_r(&itm, &ltm);
355
356
21098
	if (context == NULL)
357
	{
358
664
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u : %s%s\r\n",
359
664
				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
20434
		snprintf(text, sizeof(text), "%02u-%02u-%u %02u:%02u:%02u S-id=%u : %s%s\r\n",
365
20434
				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
21098
	return writeconsolestr(text);
371
}
372
373
778
void WorkerThreadCleanup(PFTPCONTEXT context)
374
{
375
	int					err;
376
778
	void				*retv = NULL;
377
378
778
	if ( context->WorkerThreadValid == 0 ) {
379
380
		/*
381
		 * trying to stop gracefully
382
		 */
383
71
		context->WorkerThreadAbort = 1;
384
71
		sleep(2);
385
386
71
		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
707
	if ( context->DataSocket != INVALID_SOCKET ) {
397
381
		close(context->DataSocket);
398
381
		context->DataSocket = INVALID_SOCKET;
399
	}
400
401
707
	if ( context->File != -1 ) {
402
		close(context->File);
403
		context->File = -1;
404
	}
405
406
707
	context->DataIPv4 = 0;
407
707
	context->DataPort = 0;
408
	//writelogentry(context, "WorkerThreadCleanup complete", "");
409
707
}
410
411
1403
int ftpUSER(PFTPCONTEXT context, const char *params)
412
{
413
1403
	if ( params == NULL )
414
620
		return sendstring(context, error501);
415
416
783
	context->Access = FTP_ACCESS_NOT_LOGGED_IN;
417
418
	/*
419
	 * Save username in GPBuffer for next PASS command
420
	 */
421
422
783
	writelogentry(context, " USER: ", (char *)params);
423
424
783
	strcpy(context->GPBuffer, interm331);
425
783
	strcat(context->GPBuffer, params);
426
783
	strcat(context->GPBuffer, interm331_tail);
427
783
	sendstring(context, context->GPBuffer);
428
429
783
	strcpy(context->GPBuffer, params);
430
783
	return 1;
431
}
432
433
429
int ftpQUIT(PFTPCONTEXT context, const char *params)
434
{
435
429
	writelogentry(context, " QUIT", "");
436
429
	sendstring(context, success221);
437
	/*
438
	 * retrun 0 to break command processing loop
439
	 */
440
429
	return 0;
441
}
442
443
28
int ftpNOOP(PFTPCONTEXT context, const char *params)
444
{
445
28
	return sendstring(context, success200);
446
}
447
448
779
int ftpPWD(PFTPCONTEXT context, const char *params)
449
{
450
779
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
451
159
		return sendstring(context, error530);
452
453
620
	strcpy(context->GPBuffer, "257 \"");
454
620
	strcat(context->GPBuffer, context->CurrentDir);
455
620
	strcat(context->GPBuffer, "\" is a current directory.\r\n");
456
620
	return sendstring(context, context->GPBuffer);
457
}
458
459
114
int ftpTYPE(PFTPCONTEXT context, const char *params)
460
{
461
114
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
462
50
		return sendstring(context, error530);
463
464
64
	if (params == NULL)
465
13
		return sendstring(context, error501);
466
467
51
	switch (*params)
468
	{
469
35
	case 'A':
470
	case 'a':
471
35
		return sendstring(context, success200_1);
472
1
	case 'I':
473
	case 'i':
474
1
		return sendstring(context, success200_2);
475
	}
476
477
15
	return sendstring(context, error501);
478
}
479
480
1130
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
1130
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
487
266
		return sendstring(context, error530);
488
489
864
	if ( params == NULL )
490
38
		return sendstring(context, error501);
491
492
3712
	for (c = 0; c < 4; c++) {
493
3060
		DataIP += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
494
7920
		while ( (*p >= '0') && (*p <= '9') )
495
4860
			p++;
496
3060
		if ( *p == 0 )
497
			break;
498
2886
		p++;
499
	}
500
501
1806
	for (c = 0; c < 2; c++) {
502
1468
		DataPort += ((unsigned char)strtoul(p, NULL, 10)) << c*8;
503
4479
		while ( (*p >= '0') && (*p <= '9') )
504
3011
			p++;
505
1468
		if ( *p == 0 )
506
			break;
507
980
		p++;
508
	}
509
510
826
	if ( DataIP != context->ClientIPv4 )
511
414
		return sendstring(context, error501);
512
513
412
	context->DataIPv4 = DataIP;
514
412
	context->DataPort = DataPort;
515
412
	context->Mode = MODE_NORMAL;
516
517
412
	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
467
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
467
	pthread_mutex_lock(&context->MTLock);
658
467
	pthread_cleanup_push(cleanup_handler, context);
659
	ret = 0;
660
467
	TLS_datasession = NULL;
661
662
467
	clientsocket = create_datasocket(context);
663
402
	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
402
	if (TLS_datasession != NULL)
683
	{
684
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
685
		gnutls_deinit(TLS_datasession);
686
	}
687
688
402
	writelogentry(context, " LIST complete", "");
689
690
402
	if (clientsocket == INVALID_SOCKET) {
691
402
		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
402
	context->WorkerThreadValid = -1;
704
402
	pthread_cleanup_pop(0);
705
402
	pthread_mutex_unlock(&context->MTLock);
706
402
	return NULL;
707
}
708
709
859
int ftpLIST(PFTPCONTEXT context, const char *params)
710
{
711
	struct	stat	filestats;
712
	pthread_t		tid;
713
714
859
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
715
198
		return sendstring(context, error530);
716
661
	if (context->WorkerThreadValid == 0)
717
58
		return sendstring(context, error550_t);
718
719
603
	if (params != NULL)
720
	{
721

136
		if ((strcmp(params, "-a") == 0) || (strcmp(params, "-l") == 0))
722
			params = NULL;
723
	}
724
725
603
	if (finalpath(
726
603
			context->RootDir,
727
603
			context->CurrentDir,
728
			(char *)params, context->GPBuffer) == NULL)
729
		return 0;
730
731
603
	while (stat(context->GPBuffer, &filestats) == 0)
732
	{
733
467
		if ( !S_ISDIR(filestats.st_mode) )
734
			break;
735
736
467
		sendstring(context, interm150);
737
467
		writelogentry(context, " LIST", (char *)params);
738
467
		context->WorkerThreadAbort = 0;
739
740
467
		pthread_mutex_lock(&context->MTLock);
741
742
467
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&list_thread, context);
743
467
		if ( context->WorkerThreadValid == 0 )
744
467
			context->WorkerThreadId = tid;
745
		else
746
			sendstring(context, error451);
747
748
467
		pthread_mutex_unlock(&context->MTLock);
749
750
467
		return 1;
751
	}
752
753
136
	return sendstring(context, error550);
754
}
755
756
203
int ftpCDUP(PFTPCONTEXT context, const char *params)
757
{
758
203
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
759
40
		return sendstring(context, error530);
760
761
163
	if ( strcmp(context->CurrentDir, "/") == 0 )
762
163
		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
22
int ftpCWD(PFTPCONTEXT context, const char *params)
772
{
773
	struct	stat	filestats;
774
	size_t			rl;
775
776
22
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
777
3
		return sendstring(context, error530);
778
779
19
	if ( params == NULL )
780
7
		return sendstring(context, error501);
781
782
12
	if (finalpath(
783
12
			context->RootDir,
784
12
			context->CurrentDir,
785
			(char *)params, context->GPBuffer) == NULL)
786
		return 0;
787
788
12
	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
12
	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
59
int ftpRETR(PFTPCONTEXT context, const char *params)
912
{
913
	struct	stat	filestats;
914
	pthread_t		tid;
915
916
59
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
917
11
		return sendstring(context, error530);
918
48
	if (context->WorkerThreadValid == 0)
919
14
		return sendstring(context, error550_t);
920
34
	if ( params == NULL )
921
17
		return sendstring(context, error501);
922
923
17
	if ( context->File != -1 ) {
924
		close(context->File);
925
		context->File = -1;
926
	}
927
928
17
	if (finalpath(
929
17
			context->RootDir,
930
17
			context->CurrentDir,
931
			(char *)params, context->GPBuffer) == NULL)
932
		return 0;
933
934
17
	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
17
	return sendstring(context, error550);
957
}
958
959
159
int ftpABOR(PFTPCONTEXT context, const char *params)
960
{
961
159
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
962
42
		return sendstring(context, error530);
963
964
117
	writelogentry(context, " ABORT command", NULL);
965
117
	WorkerThreadCleanup(context);
966
114
	return sendstring(context, success226);
967
}
968
969
121
int ftpDELE(PFTPCONTEXT context, const char *params)
970
{
971
121
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
972
21
		return sendstring(context, error530);
973
100
	if ( context->Access < FTP_ACCESS_FULL )
974
49
		return sendstring(context, error550_r);
975
51
	if ( params == NULL )
976
17
		return sendstring(context, error501);
977
978
34
	if (finalpath(
979
34
			context->RootDir,
980
34
			context->CurrentDir,
981
			(char *)params, context->GPBuffer) == NULL)
982
		return 0;
983
984
34
	if ( unlink(context->GPBuffer) == 0 ) {
985
		sendstring(context, success250);
986
		writelogentry(context, " DELE: ", (char *)params);
987
	}
988
	else
989
34
		sendstring(context, error550_r);
990
991
	return 1;
992
}
993
994
582
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
582
		if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1005
		{
1006
93
			sendstring(context, error530);
1007
93
			break;
1008
		}
1009
1010
489
		if ( context->WorkerThreadValid == 0 )
1011
		{
1012
47
			sendstring(context, error550_t);
1013
47
			break;
1014
		}
1015
1016
442
		if ( context->DataSocket != INVALID_SOCKET )
1017
251
			close(context->DataSocket);
1018
1019
442
		context->DataSocket = INVALID_SOCKET;
1020
1021
442
		datasocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1022
442
		if (datasocket == INVALID_SOCKET)
1023
		{
1024
			sendstring(context, error451);
1025
			break;
1026
		}
1027
1028
442
		for (c = g_cfg.PasvPortBase; c <= g_cfg.PasvPortMax; c++) {
1029
442
			clock_gettime(CLOCK_REALTIME, &rtctime);
1030
			memset(&laddr, 0, sizeof(laddr));
1031
442
			laddr.sin_family = AF_INET;
1032
442
			laddr.sin_port = htons((in_port_t)(g_cfg.PasvPortBase +
1033
				(rtctime.tv_nsec % (g_cfg.PasvPortMax-g_cfg.PasvPortBase))));
1034
442
			laddr.sin_addr.s_addr = context->ServerIPv4;
1035
442
			socketret = bind(datasocket, (struct sockaddr *)&laddr, sizeof(laddr));
1036
442
			if ( socketret == 0 )
1037
				break;
1038
		}
1039
1040
442
		if ( socketret != 0 ) {
1041
			close(datasocket);
1042
			sendstring(context, error451);
1043
			break;
1044
		}
1045
1046
442
		socketret = listen(datasocket, SOMAXCONN);
1047
442
		if (socketret != 0) {
1048
			close(datasocket);
1049
			sendstring(context, error451);
1050
			break;
1051
		}
1052
1053
442
		if ((context->ClientIPv4 & g_cfg.LocalIPMask) == (context->ServerIPv4 & g_cfg.LocalIPMask))
1054
		{
1055
442
			context->DataIPv4 = context->ServerIPv4;
1056
442
			writelogentry(context, " local client.", "");
1057
		} else {
1058
			context->DataIPv4 = g_cfg.ExternalInterface;
1059
			writelogentry(context, " nonlocal client.", "");
1060
		}
1061
1062
442
		context->DataPort = laddr.sin_port;
1063
442
		context->DataSocket = datasocket;
1064
442
		context->Mode = MODE_PASSIVE;
1065
1066
		result = 1;
1067
442
		break;
1068
	}
1069
1070
582
	return result;
1071
}
1072
1073
280
int ftpEPSV (PFTPCONTEXT context, const char *params)
1074
{
1075
280
	if (pasv(context) == 0)
1076
		return 1;
1077
1078
202
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success229,
1079
202
			ntohs(context->DataPort));
1080
1081
202
	writelogentry(context, " entering extended passive mode", "");
1082
1083
202
	return sendstring(context, context->GPBuffer);
1084
}
1085
1086
302
int ftpPASV(PFTPCONTEXT context, const char *params)
1087
{
1088
302
	if (pasv(context) == 0)
1089
		return 1;
1090
1091
240
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, success227,
1092
			context->DataIPv4 & 0xff,
1093
240
			(context->DataIPv4 >> 8) & 0xff,
1094
240
			(context->DataIPv4 >> 16) & 0xff,
1095
240
			(context->DataIPv4 >> 24) & 0xff,
1096
			context->DataPort & 0xff,
1097
240
			(context->DataPort >> 8) & 0xff);
1098
1099
240
	writelogentry(context, " entering passive mode", "");
1100
1101
240
	return sendstring(context, context->GPBuffer);
1102
}
1103
1104
1621
int ftpPASS(PFTPCONTEXT context, const char *params)
1105
{
1106
	char	temptext[256];
1107
1108
1621
	if ( params == NULL )
1109
14
		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
1607
	if (!ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "pswd", temptext, sizeof(temptext)))
1117
609
		return sendstring(context, error530_r);
1118
1119

998
	if ( (strcmp(temptext, params) == 0) || (temptext[0] == '*') )
1120
	{
1121
808
		memset(context->RootDir, 0, sizeof(context->RootDir));
1122
		memset(temptext, 0, sizeof(temptext));
1123
1124
808
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "root", context->RootDir, sizeof(context->RootDir));
1125
808
		ParseConfig(g_cfg.ConfigFile, context->GPBuffer, "accs", temptext, sizeof(temptext));
1126
1127
808
		context->Access = FTP_ACCESS_NOT_LOGGED_IN;
1128
		do {
1129
1130
808
			if ( strcasecmp(temptext, "admin") == 0 ) {
1131
627
				context->Access = FTP_ACCESS_FULL;
1132
627
				break;
1133
			}
1134
1135
181
			if ( strcasecmp(temptext, "upload") == 0 ) {
1136
61
				context->Access = FTP_ACCESS_CREATENEW;
1137
61
				break;
1138
			}
1139
1140
120
			if ( strcasecmp(temptext, "readonly") == 0 ) {
1141
120
				context->Access = FTP_ACCESS_READONLY;
1142
120
				break;
1143
			}
1144
1145
			return sendstring(context, error530_b);
1146
		} while (0);
1147
1148
808
		writelogentry(context, " PASS->successful logon", "");
1149
	}
1150
	else
1151
190
		return sendstring(context, error530_r);
1152
1153
808
	return sendstring(context, success230);
1154
}
1155
1156
114
int ftpREST(PFTPCONTEXT context, const char *params)
1157
{
1158
114
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1159
19
		return sendstring(context, error530);
1160
1161
95
	if ( params == NULL )
1162
31
		return sendstring(context, error501);
1163
1164
64
	context->RestPoint = strtoull(params, NULL, 10);
1165
64
	snprintf(context->GPBuffer, SIZE_OF_GPBUFFER, "%s %llu\r\n",
1166
			interm350, (unsigned long long int)context->RestPoint);
1167
1168
64
	return sendstring(context, context->GPBuffer);
1169
}
1170
1171
100
int ftpSIZE(PFTPCONTEXT context, const char *params)
1172
{
1173
	struct stat		filestats;
1174
1175
100
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1176
24
		return sendstring(context, error530);
1177
76
	if ( params == NULL )
1178
29
		return sendstring(context, error501);
1179
1180
47
	if (finalpath(
1181
47
			context->RootDir,
1182
47
			context->CurrentDir,
1183
			(char *)params, context->GPBuffer) == NULL)
1184
		return 0;
1185
1186
47
	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
46
		sendstring(context, error550);
1194
1195
	return 1;
1196
}
1197
1198
699
int ftpMKD(PFTPCONTEXT context, const char *params)
1199
{
1200
699
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1201
163
		return sendstring(context, error530);
1202
536
	if ( context->Access < FTP_ACCESS_CREATENEW )
1203
29
		return sendstring(context, error550_r);
1204
507
	if ( params == NULL )
1205
32
		return sendstring(context, error501);
1206
1207
475
	if (finalpath(
1208
475
			context->RootDir,
1209
475
			context->CurrentDir,
1210
			(char *)params, context->GPBuffer) == NULL)
1211
		return 0;
1212
1213
475
	if ( mkdir(context->GPBuffer, 0755) == 0 ) {
1214
399
		sendstring(context, success257);
1215
399
		writelogentry(context, " MKD: ", (char *)params);
1216
	}
1217
	else
1218
76
		sendstring(context, error550_r);
1219
1220
	return 1;
1221
}
1222
1223
33
int ftpRMD(PFTPCONTEXT context, const char *params)
1224
{
1225
33
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1226
10
		return sendstring(context, error530);
1227
23
	if ( context->Access < FTP_ACCESS_FULL )
1228
6
		return sendstring(context, error550_r);
1229
17
	if ( params == NULL )
1230
14
		return sendstring(context, error501);
1231
1232
3
	if (finalpath(
1233
3
			context->RootDir,
1234
3
			context->CurrentDir,
1235
			(char *)params, context->GPBuffer) == NULL)
1236
		return 0;
1237
1238
3
	if ( rmdir(context->GPBuffer) == 0 ) {
1239
		sendstring(context, success250);
1240
		writelogentry(context, " DELE: ", (char *)params);
1241
	}
1242
	else
1243
3
		sendstring(context, error550_r);
1244
1245
	return 1;
1246
}
1247
1248
32
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
32
	pthread_mutex_lock(&context->MTLock);
1259
32
	pthread_cleanup_push(cleanup_handler, context);
1260
1261
	f = -1;
1262
	sz_total = 0;
1263
	buffer = NULL;
1264
32
	TLS_datasession = NULL;
1265
32
	clock_gettime(CLOCK_MONOTONIC, &t);
1266
32
	lt0 = t.tv_sec*1e9 + t.tv_nsec;
1267
1268
32
	clientsocket = create_datasocket(context);
1269
26
	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
26
	clock_gettime(CLOCK_MONOTONIC, &t);
1298
26
	lt1 = t.tv_sec*1e9 + t.tv_nsec;
1299
1300
26
	if (f != -1)
1301
		close(f);
1302
1303
26
	context->File = -1;
1304
1305
26
	if (TLS_datasession != NULL)
1306
	{
1307
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1308
		gnutls_deinit(TLS_datasession);
1309
	}
1310
1311
	/* calculating performance */
1312
26
	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
26
	if (clientsocket == INVALID_SOCKET) {
1322
26
		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
26
	context->WorkerThreadValid = -1;
1335
26
	pthread_cleanup_pop(0);
1336
26
	pthread_mutex_unlock(&context->MTLock);
1337
26
	return NULL;
1338
}
1339
1340
88
int ftpSTOR(PFTPCONTEXT context, const char *params)
1341
{
1342
	struct	stat	filestats;
1343
	pthread_t		tid;
1344
1345
88
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1346
9
		return sendstring(context, error530);
1347
79
	if ( context->Access < FTP_ACCESS_CREATENEW )
1348
6
		return sendstring(context, error550_r);
1349
73
	if ( params == NULL )
1350
31
		return sendstring(context, error501);
1351
42
	if ( context->WorkerThreadValid == 0 )
1352
10
		return sendstring(context, error550_t);
1353
1354
32
	if ( context->File != -1 ) {
1355
		close(context->File);
1356
		context->File = -1;
1357
	}
1358
1359
32
	if (finalpath(
1360
32
			context->RootDir,
1361
32
			context->CurrentDir,
1362
			(char *)params, context->GPBuffer) == NULL)
1363
		return 0;
1364
1365
32
	if ( context->Access == FTP_ACCESS_FULL )
1366
22
		context->CreateMode = O_CREAT | O_WRONLY| O_TRUNC;
1367
	else
1368
	{
1369
10
		context->CreateMode = O_CREAT | O_WRONLY| O_EXCL;
1370
10
		if (stat(context->GPBuffer, &filestats) == 0)
1371
			return sendstring(context, error550_r);
1372
	}
1373
1374
32
	sendstring(context, interm150);
1375
32
	writelogentry(context, " STOR: ", (char *)params);
1376
32
	context->WorkerThreadAbort = 0;
1377
1378
32
	pthread_mutex_lock(&context->MTLock);
1379
1380
32
	context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&stor_thread, context);
1381
32
	if ( context->WorkerThreadValid == 0 )
1382
32
		context->WorkerThreadId = tid;
1383
	else
1384
		sendstring(context, error451);
1385
1386
32
	pthread_mutex_unlock(&context->MTLock);
1387
1388
32
	return 1;
1389
}
1390
1391
712
int ftpSYST(PFTPCONTEXT context, const char *params)
1392
{
1393
712
	return sendstring(context, success215);
1394
}
1395
1396
35
int ftpHELP(PFTPCONTEXT context, const char *params)
1397
{
1398
35
	return sendstring(context, success214);
1399
}
1400
1401
60
int ftpSITE(PFTPCONTEXT context, const char *params)
1402
{
1403
60
	if ( params != NULL )
1404
23
		if (strcasecmp(params, "help") == 0)
1405
			return sendstring(context, "200 chmod\r\n");
1406
1407
60
	return sendstring(context, error500);
1408
}
1409
1410
13
int ftpFEAT(PFTPCONTEXT context, const char *params)
1411
{
1412
13
	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
146
int ftpAPPE(PFTPCONTEXT context, const char *params)
1491
{
1492
	struct	stat	filestats;
1493
	pthread_t		tid;
1494
1495
146
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1496
23
		return sendstring(context, error530);
1497
123
	if ( context->Access < FTP_ACCESS_FULL )
1498
39
		return sendstring(context, error550_r);
1499
84
	if ( params == NULL )
1500
8
		return sendstring(context, error501);
1501
76
	if ( context->WorkerThreadValid == 0 )
1502
28
		return sendstring(context, error550_t);
1503
1504
48
	if ( context->File != -1 ) {
1505
		close(context->File);
1506
		context->File = -1;
1507
	}
1508
1509
48
	if (finalpath(
1510
48
			context->RootDir,
1511
48
			context->CurrentDir,
1512
			(char *)params, context->GPBuffer) == NULL)
1513
		return 0;
1514
1515
	/*
1516
	 * stat must NOT fail
1517
	 */
1518
48
	while (stat(context->GPBuffer, &filestats) == 0)
1519
	{
1520
		/*
1521
		 * do not try to "append" for directories
1522
		*/
1523
1
		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
48
	return sendstring(context, error550);
1544
}
1545
1546
88
int ftpRNFR(PFTPCONTEXT context, const char *params)
1547
{
1548
	struct stat		filestats;
1549
1550
88
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1551
12
		return sendstring(context, error530);
1552
76
	if ( context->Access < FTP_ACCESS_FULL )
1553
8
		return sendstring(context, error550_r);
1554
68
	if ( params == NULL )
1555
26
		return sendstring(context, error501);
1556
1557
42
	if (finalpath(
1558
42
			context->RootDir,
1559
42
			context->CurrentDir,
1560
			(char *)params, context->GPBuffer) == NULL)
1561
		return 0;
1562
1563
42
	if ( stat(context->GPBuffer, &filestats) == 0 )
1564
	{
1565
		writelogentry(context, " RNFR: ", context->GPBuffer);
1566
		sendstring(context, interm350_ren);
1567
	}
1568
	else
1569
42
		sendstring(context, error550);
1570
1571
	return 1;
1572
}
1573
1574
189
int ftpRNTO(PFTPCONTEXT context, const char *params)
1575
{
1576
	char	*_text;
1577
1578
189
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1579
22
		return sendstring(context, error530);
1580
167
	if ( context->Access < FTP_ACCESS_FULL )
1581
49
		return sendstring(context, error550_r);
1582
118
	if ( params == NULL )
1583
13
		return sendstring(context, error501);
1584
1585
105
	_text = x_malloc(SIZE_OF_GPBUFFER);
1586
1587
105
	if (finalpath(
1588
105
			context->RootDir,
1589
105
			context->CurrentDir,
1590
			(char *)params, _text) == NULL)
1591
	{
1592
		free(_text);
1593
		return 0;
1594
	}
1595
1596
105
	if ( rename(context->GPBuffer, _text) == 0 )
1597
	{
1598
7
		writelogentry(context, " RNTO: ", _text);
1599
7
		sendstring(context, success250);
1600
	}
1601
	else
1602
98
		sendstring(context, error550);
1603
1604
105
	free(_text);
1605
105
	return 1;
1606
}
1607
1608
65
int ftpOPTS(PFTPCONTEXT context, const char *params)
1609
{
1610
65
	if ( params != NULL )
1611
30
		if (strcasecmp(params, "utf8 on") == 0)
1612
			return sendstring(context, "200 Always in UTF8 mode.\r\n");
1613
1614
65
	writelogentry(context, " unsupported OPTS: ", params);
1615
65
	return sendstring(context, error500);
1616
}
1617
1618
95
int ftpAUTH(PFTPCONTEXT context, const char *params)
1619
{
1620
95
	if ( params == NULL )
1621
37
		return sendstring(context, error501);
1622
1623
58
	if ( strcasecmp(params, "TLS") == 0 )
1624
		/* InitTLSSession will send reply */
1625
		return InitTLSSession(&context->TLS_session, context->ControlSocket, 1);
1626
	else
1627
58
		return sendstring(context, error504);
1628
}
1629
1630
48
int ftpPBSZ (PFTPCONTEXT context, const char *params)
1631
{
1632
48
	if ( params == NULL )
1633
36
		return sendstring(context, error501);
1634
1635
12
	if ( context->TLS_session == NULL )
1636
12
		return sendstring(context, error503);
1637
1638
	context->BlockSize = strtoul(params, NULL, 10);
1639
	return sendstring(context, success200);
1640
}
1641
1642
550
int ftpPROT (PFTPCONTEXT context, const char *params)
1643
{
1644
550
	if ( context->Access == FTP_ACCESS_NOT_LOGGED_IN )
1645
115
		return sendstring(context, error530);
1646
1647
435
	if ( params == NULL )
1648
26
			return sendstring(context, error501);
1649
1650
409
	if ( context->TLS_session == NULL )
1651
409
		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
42
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
42
	pthread_mutex_lock(&context->MTLock);
1730
42
	pthread_cleanup_push(cleanup_handler, context);
1731
	ret = 0;
1732
42
	TLS_datasession = NULL;
1733
1734
42
	clientsocket = create_datasocket(context);
1735
42
	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
42
	if (TLS_datasession != NULL)
1755
	{
1756
		gnutls_bye(TLS_datasession, GNUTLS_SHUT_RDWR);
1757
		gnutls_deinit(TLS_datasession);
1758
	}
1759
1760
42
	writelogentry(context, " LIST complete", "");
1761
1762
42
	if (clientsocket == INVALID_SOCKET) {
1763
42
		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
42
	context->WorkerThreadValid = -1;
1776
42
	pthread_cleanup_pop(0);
1777
42
	pthread_mutex_unlock(&context->MTLock);
1778
42
	return NULL;
1779
}
1780
1781
168
int ftpMLSD(PFTPCONTEXT context, const char *params)
1782
{
1783
	struct	stat	filestats;
1784
	pthread_t		tid;
1785
1786
168
	if (context->Access == FTP_ACCESS_NOT_LOGGED_IN)
1787
43
		return sendstring(context, error530);
1788
125
	if (context->WorkerThreadValid == 0)
1789
32
		return sendstring(context, error550_t);
1790
1791
93
	if (finalpath(
1792
93
			context->RootDir,
1793
93
			context->CurrentDir,
1794
			(char *)params, context->GPBuffer) == NULL)
1795
		return 0;
1796
1797
93
	while (stat(context->GPBuffer, &filestats) == 0)
1798
	{
1799
42
		if ( !S_ISDIR(filestats.st_mode) )
1800
			break;
1801
1802
42
		sendstring(context, interm150);
1803
42
		writelogentry(context, " MLSD-LIST ", (char *)params);
1804
42
		context->WorkerThreadAbort = 0;
1805
1806
42
		pthread_mutex_lock(&context->MTLock);
1807
1808
42
		context->WorkerThreadValid = pthread_create(&tid, NULL, (__ptr_thread_start_routine)&msld_thread, context);
1809
42
		if ( context->WorkerThreadValid == 0 )
1810
42
			context->WorkerThreadId = tid;
1811
		else
1812
			sendstring(context, error451);
1813
1814
42
		pthread_mutex_unlock(&context->MTLock);
1815
1816
42
		return 1;
1817
	}
1818
1819
51
	return sendstring(context, error550);
1820
}
1821
1822
14935
int recvcmd(PFTPCONTEXT context, char *buffer, size_t buffer_size)
1823
{
1824
	ssize_t	l, p = 0;
1825
1826
14935
	if ( buffer_size < 5 )
1827
		return 0;
1828
1829
	memset(buffer, 0, buffer_size);
1830
14935
	--buffer_size;
1831
1832
15207
	while (buffer_size > 0)
1833
	{
1834
15205
		if (context->TLS_session == NULL)
1835
15205
			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
15205
		if ( l <= 0 )
1840
			return 0;
1841
1842
14975
		buffer_size -= l;
1843
14975
		p += l;
1844
1845
14975
		if ( p >= 2 )
1846

14965
			if ( (buffer[p-2] == '\r') && (buffer[p-1] == '\n') )
1847
			{
1848
14703
				buffer[p-2] = 0;
1849
14703
				return 1;
1850
			}
1851
	}
1852
1853
	return 0;
1854
}
1855
1856
664
void *ftp_client_thread(SOCKET *s)
1857
664
{
1858
	FTPCONTEXT				ctx __attribute__ ((aligned (16)));
1859
664
	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
664
	ctx.Access = FTP_ACCESS_NOT_LOGGED_IN;
1868
664
	ctx.ControlSocket = *s;
1869
664
	ctx.GPBuffer = x_malloc(SIZE_OF_GPBUFFER);
1870
1871
	memset(&laddr, 0, sizeof(laddr));
1872
664
	asz = sizeof(laddr);
1873
664
	while ( getsockname(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) == 0 )
1874
	{
1875
664
		ctx.ServerIPv4 = laddr.sin_addr.s_addr;
1876
1877
		memset(&laddr, 0, sizeof(laddr));
1878
664
		asz = sizeof(laddr);
1879
664
		if ( getpeername(ctx.ControlSocket, (struct sockaddr *)&laddr, &asz) != 0 )
1880
			break;
1881
1882
664
		ctx.ClientIPv4 = laddr.sin_addr.s_addr;
1883
664
		ctx.Mode = MODE_NORMAL;
1884
664
		ctx.WorkerThreadAbort = 0;
1885
664
		ctx.WorkerThreadValid = -1;
1886
664
		ctx.SessionID = __sync_add_and_fetch(&g_newid, 1);
1887
664
		ctx.File = -1;
1888
664
		ctx.DataSocket = INVALID_SOCKET;
1889
1890
664
		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
664
        pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE_NP);
1895
#endif
1896
664
        pthread_mutex_init(&ctx.MTLock, &m_attr);
1897
1898
664
		ctx.CurrentDir[0] = '/';
1899
664
		sendstring(&ctx, success220);
1900
1901
		memset(&rcvbuf, 0, sizeof(rcvbuf));
1902
1903
664
		snprintf(rcvbuf, sizeof(rcvbuf), "<- New user IP=%u.%u.%u.%u:%u",
1904
				laddr.sin_addr.s_addr & 0xff,
1905
664
				(laddr.sin_addr.s_addr >> 8 ) & 0xff,
1906
664
				(laddr.sin_addr.s_addr >> 16 ) & 0xff,
1907
664
				(laddr.sin_addr.s_addr >> 24 ) & 0xff,
1908
664
				ntohs(laddr.sin_port)
1909
				);
1910
1911
664
		writelogentry(&ctx, rcvbuf, "");
1912
1913
14935
		while ( ctx.ControlSocket != INVALID_SOCKET ) {
1914
14935
			if ( !recvcmd(&ctx, rcvbuf, sizeof(rcvbuf)) )
1915
				break;
1916
1917
			i = 0;
1918

24066
			while ((rcvbuf[i] != 0) && (isalpha(rcvbuf[i]) == 0))
1919
9363
				++i;
1920
1921
14703
			cmd = &rcvbuf[i];
1922
128051
			while ((rcvbuf[i] != 0) && (rcvbuf[i] != ' '))
1923
113348
				++i;
1924
1925
14703
			cmdlen = &rcvbuf[i] - cmd;
1926
22992
			while (rcvbuf[i] == ' ')
1927
8289
				++i;
1928
1929
14703
			if (rcvbuf[i] == 0)
1930
				params = NULL;
1931
			else
1932
7403
				params = &rcvbuf[i];
1933
1934
			cmdno = -1;
1935
			rv = 1;
1936
261761
			for (c=0; c<MAX_CMDS; c++)
1937
257770
				if (strncasecmp(cmd, ftpcmds[c], cmdlen) == 0)
1938
				{
1939
					cmdno = c;
1940
10712
					rv = ftpprocs[c](&ctx, params);
1941
10709
					break;
1942
				}
1943
1944
14700
			if ( cmdno != FTP_PASSCMD_INDEX )
1945
13079
				writelogentry(&ctx, " @@ CMD: ", rcvbuf);
1946
			else
1947
1621
				writelogentry(&ctx, " @@ CMD: ", "PASS ***");
1948
1949
14700
			if ( cmdno == -1 )
1950
3991
				sendstring(&ctx, error500);
1951
1952
14700
			if ( rv <= 0 )
1953
				break;
1954
		};
1955
1956
661
		WorkerThreadCleanup(&ctx);
1957
1958
593
		pthread_mutex_destroy(&ctx.MTLock);
1959
593
		pthread_mutexattr_destroy(&m_attr);
1960
593
		writelogentry(&ctx, "User disconnected", "");
1961
593
		break;
1962
	}
1963
1964
593
	if (ctx.TLS_session != NULL)
1965
		gnutls_deinit(ctx.TLS_session);
1966
1967
593
	free(ctx.GPBuffer);
1968
593
	close(ctx.ControlSocket);
1969
593
	*s = INVALID_SOCKET;
1970
593
	return NULL;
1971
}
1972
1973
664
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
664
	ftpsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1988
664
	if ( ftpsocket == INVALID_SOCKET )
1989
	{
1990
		printf("\r\n socket create error\r\n");
1991
		return 0;
1992
	}
1993
1994
664
	rv = 1;
1995
664
	setsockopt(ftpsocket, SOL_SOCKET, SO_REUSEADDR, &rv, sizeof(rv));
1996
1997
664
	scb = (SOCKET *)x_malloc(sizeof(SOCKET)*g_cfg.MaxUsers);
1998
7304
	for (i = 0; i<g_cfg.MaxUsers; i++)
1999
6640
		scb[i] = INVALID_SOCKET;
2000
2001
	memset(&laddr, 0, sizeof(laddr));
2002
664
	laddr.sin_family = AF_INET;
2003
664
	laddr.sin_port = htons(g_cfg.Port);
2004
664
	laddr.sin_addr.s_addr = g_cfg.BindToInterface;
2005
664
	socketret = bind(ftpsocket, (struct sockaddr *)&laddr, sizeof(laddr));
2006
664
	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
664
	writelogentry(NULL, success220, "");
2014
2015
664
	socketret = listen(ftpsocket, SOMAXCONN);
2016
664
	while ( socketret == 0 ) {
2017
		memset(&laddr, 0, sizeof(laddr));
2018
664
		asz = sizeof(laddr);
2019
664
		clientsocket = accept(ftpsocket, (struct sockaddr *)&laddr, &asz);
2020
664
		if (clientsocket != INVALID_SOCKET) {
2021
664
			rv = -1;
2022
664
			for (i=0; i<g_cfg.MaxUsers; i++) {
2023
664
				if ( scb[i] == INVALID_SOCKET ) {
2024
2025
664
					scb[i] = clientsocket;
2026
664
					rv = pthread_create(&th, NULL, (__ptr_thread_start_routine)&ftp_client_thread, &scb[i]);
2027
664
					if ( rv != 0 )
2028
						scb[i] = INVALID_SOCKET;
2029
2030
					break;
2031
				}
2032
			}
2033
2034
664
			if ( rv != 0 ) {
2035
				sendstring_plaintext(clientsocket, NOSLOTS);
2036
				close(clientsocket);
2037
			}
2038
		}
2039
    //Terminate the main thread when the child thread terminates
2040
664
		pthread_join(th, NULL);
2041
593
    break;
2042
	}
2043
2044
593
	free(scb);
2045
593
	close(ftpsocket);
2046
2047
593
	return NULL;
2048
}