forked from FFmpeg/FFmpeg
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathftp.c
1191 lines (1019 loc) · 33.5 KB
/
ftp.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright (c) 2013 Lukasz Marek <[email protected]>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/parseutils.h"
#include "avformat.h"
#include "internal.h"
#include "url.h"
#include "urldecode.h"
#include "libavutil/opt.h"
#include "libavutil/bprint.h"
#define CONTROL_BUFFER_SIZE 1024
#define DIR_BUFFER_SIZE 4096
typedef enum {
UNKNOWN,
READY,
DOWNLOADING,
UPLOADING,
LISTING_DIR,
DISCONNECTED,
ENDOFFILE,
} FTPState;
typedef enum {
UNKNOWN_METHOD,
NLST,
MLSD
} FTPListingMethod;
typedef struct {
const AVClass *class;
URLContext *conn_control; /**< Control connection */
URLContext *conn_data; /**< Data connection, NULL when not connected */
uint8_t control_buffer[CONTROL_BUFFER_SIZE]; /**< Control connection buffer */
uint8_t *control_buf_ptr, *control_buf_end;
int server_data_port; /**< Data connection port opened by server, -1 on error. */
int server_control_port; /**< Control connection port, default is 21 */
char *hostname; /**< Server address. */
char *user; /**< Server user */
char *password; /**< Server user's password */
char *path; /**< Path to resource on server. */
int64_t filesize; /**< Size of file on server, -1 on error. */
int64_t position; /**< Current position, calculated. */
int rw_timeout; /**< Network timeout. */
const char *anonymous_password; /**< Password to be used for anonymous user. An email should be used. */
int write_seekable; /**< Control seekability, 0 = disable, 1 = enable. */
FTPState state; /**< State of data connection */
FTPListingMethod listing_method; /**< Called listing method */
char *features; /**< List of server's features represented as raw response */
char *dir_buffer;
size_t dir_buffer_size;
size_t dir_buffer_offset;
int utf8;
const char *option_user; /**< User to be used if none given in the URL */
const char *option_password; /**< Password to be used if none given in the URL */
} FTPContext;
#define OFFSET(x) offsetof(FTPContext, x)
#define D AV_OPT_FLAG_DECODING_PARAM
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{"timeout", "set timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
{"ftp-write-seekable", "control seekability of connection during encoding", OFFSET(write_seekable), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },
{"ftp-anonymous-password", "password for anonymous login. E-mail address should be used.", OFFSET(anonymous_password), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
{"ftp-user", "user for FTP login. Overridden by whatever is in the URL.", OFFSET(option_user), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
{"ftp-password", "password for FTP login. Overridden by whatever is in the URL.", OFFSET(option_password), AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
{NULL}
};
static const AVClass ftp_context_class = {
.class_name = "ftp",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static int ftp_close(URLContext *h);
static int ftp_getc(FTPContext *s)
{
int len;
if (s->control_buf_ptr >= s->control_buf_end) {
len = ffurl_read(s->conn_control, s->control_buffer, CONTROL_BUFFER_SIZE);
if (len < 0) {
return len;
} else if (!len) {
return -1;
} else {
s->control_buf_ptr = s->control_buffer;
s->control_buf_end = s->control_buffer + len;
}
}
return *s->control_buf_ptr++;
}
static int ftp_get_line(FTPContext *s, char *line, int line_size)
{
int ch;
char *q = line;
for (;;) {
ch = ftp_getc(s);
if (ch < 0) {
return ch;
}
if (ch == '\n') {
/* process line */
if (q > line && q[-1] == '\r')
q--;
*q = '\0';
return 0;
} else {
if ((q - line) < line_size - 1)
*q++ = ch;
}
}
}
/*
* This routine returns ftp server response code.
* Server may send more than one response for a certain command.
* First expected code is returned.
*/
static int ftp_status(FTPContext *s, char **line, const int response_codes[])
{
int err, i, dash = 0, result = 0, code_found = 0, linesize;
char buf[CONTROL_BUFFER_SIZE];
AVBPrint line_buffer;
if (line)
av_bprint_init(&line_buffer, 0, AV_BPRINT_SIZE_AUTOMATIC);
while (!code_found || dash) {
if ((err = ftp_get_line(s, buf, sizeof(buf))) < 0) {
if (line)
av_bprint_finalize(&line_buffer, NULL);
return err;
}
av_log(s, AV_LOG_DEBUG, "%s\n", buf);
linesize = strlen(buf);
err = 0;
if (linesize >= 3) {
for (i = 0; i < 3; ++i) {
if (buf[i] < '0' || buf[i] > '9') {
err = 0;
break;
}
err *= 10;
err += buf[i] - '0';
}
}
if (!code_found) {
if (err >= 500) {
code_found = 1;
result = err;
} else
for (i = 0; response_codes[i]; ++i) {
if (err == response_codes[i]) {
code_found = 1;
result = err;
break;
}
}
}
if (code_found) {
if (line)
av_bprintf(&line_buffer, "%s\r\n", buf);
if (linesize >= 4) {
if (!dash && buf[3] == '-')
dash = err;
else if (err == dash && buf[3] == ' ')
dash = 0;
}
}
}
if (line)
av_bprint_finalize(&line_buffer, line);
return result;
}
static int ftp_send_command(FTPContext *s, const char *command,
const int response_codes[], char **response)
{
int err;
ff_dlog(s, "%s", command);
if (response)
*response = NULL;
if (!s->conn_control)
return AVERROR(EIO);
if ((err = ffurl_write(s->conn_control, command, strlen(command))) < 0)
return err;
if (!err)
return -1;
/* return status */
if (response_codes) {
return ftp_status(s, response, response_codes);
}
return 0;
}
static void ftp_close_data_connection(FTPContext *s)
{
ffurl_closep(&s->conn_data);
s->state = DISCONNECTED;
}
static void ftp_close_both_connections(FTPContext *s)
{
ffurl_closep(&s->conn_control);
ftp_close_data_connection(s);
}
static int ftp_auth(FTPContext *s)
{
char buf[CONTROL_BUFFER_SIZE];
int err;
static const int user_codes[] = {331, 230, 0};
static const int pass_codes[] = {230, 0};
if (strpbrk(s->user, "\r\n"))
return AVERROR(EINVAL);
err = snprintf(buf, sizeof(buf), "USER %s\r\n", s->user);
if (err >= sizeof(buf))
return AVERROR(ENOSYS);
err = ftp_send_command(s, buf, user_codes, NULL);
if (err == 331) {
if (s->password) {
if (strpbrk(s->password, "\r\n"))
return AVERROR(EINVAL);
err = snprintf(buf, sizeof(buf), "PASS %s\r\n", s->password);
if (err >= sizeof(buf))
return AVERROR(ENOSYS);
err = ftp_send_command(s, buf, pass_codes, NULL);
} else
return AVERROR(EACCES);
}
if (err != 230)
return AVERROR(EACCES);
return 0;
}
static int ftp_passive_mode_epsv(FTPContext *s)
{
char *res = NULL, *start = NULL, *end = NULL;
int i;
static const char d = '|';
static const char *command = "EPSV\r\n";
static const int epsv_codes[] = {229, 0};
if (ftp_send_command(s, command, epsv_codes, &res) != 229 || !res)
goto fail;
for (i = 0; res[i]; ++i) {
if (res[i] == '(') {
start = res + i + 1;
} else if (res[i] == ')') {
end = res + i;
break;
}
}
if (!start || !end)
goto fail;
*end = '\0';
if (strlen(start) < 5)
goto fail;
if (start[0] != d || start[1] != d || start[2] != d || end[-1] != d)
goto fail;
start += 3;
end[-1] = '\0';
s->server_data_port = atoi(start);
ff_dlog(s, "Server data port: %d\n", s->server_data_port);
av_free(res);
return 0;
fail:
av_free(res);
s->server_data_port = -1;
return AVERROR(ENOSYS);
}
static int ftp_passive_mode(FTPContext *s)
{
char *res = NULL, *start = NULL, *end = NULL;
int i;
static const char *command = "PASV\r\n";
static const int pasv_codes[] = {227, 0};
if (ftp_send_command(s, command, pasv_codes, &res) != 227 || !res)
goto fail;
for (i = 0; res[i]; ++i) {
if (res[i] == '(') {
start = res + i + 1;
} else if (res[i] == ')') {
end = res + i;
break;
}
}
if (!start || !end)
goto fail;
*end = '\0';
/* skip ip */
if (!av_strtok(start, ",", &end)) goto fail;
if (!av_strtok(NULL, ",", &end)) goto fail;
if (!av_strtok(NULL, ",", &end)) goto fail;
if (!av_strtok(NULL, ",", &end)) goto fail;
/* parse port number */
start = av_strtok(NULL, ",", &end);
if (!start) goto fail;
s->server_data_port = atoi(start) * 256;
start = av_strtok(NULL, ",", &end);
if (!start) goto fail;
s->server_data_port += atoi(start);
ff_dlog(s, "Server data port: %d\n", s->server_data_port);
av_free(res);
return 0;
fail:
av_free(res);
s->server_data_port = -1;
return AVERROR(EIO);
}
static int ftp_current_dir(FTPContext *s)
{
char *res = NULL, *start = NULL, *end = NULL;
int i;
static const char *command = "PWD\r\n";
static const int pwd_codes[] = {257, 0};
if (ftp_send_command(s, command, pwd_codes, &res) != 257 || !res)
goto fail;
for (i = 0; res[i]; ++i) {
if (res[i] == '"') {
if (!start) {
start = res + i + 1;
continue;
}
end = res + i;
break;
}
}
if (!end)
goto fail;
*end = '\0';
s->path = av_strdup(start);
av_free(res);
if (!s->path)
return AVERROR(ENOMEM);
return 0;
fail:
av_free(res);
return AVERROR(EIO);
}
static int ftp_file_size(FTPContext *s)
{
char command[CONTROL_BUFFER_SIZE];
char *res = NULL;
int ret;
static const int size_codes[] = {213, 0};
ret = snprintf(command, sizeof(command), "SIZE %s\r\n", s->path);
if (ret >= sizeof(command))
return AVERROR(ENOSYS);
if (ftp_send_command(s, command, size_codes, &res) == 213 && res && strlen(res) > 4) {
s->filesize = strtoll(&res[4], NULL, 10);
} else {
s->filesize = -1;
av_free(res);
return AVERROR(EIO);
}
av_free(res);
return 0;
}
static int ftp_retrieve(FTPContext *s)
{
char command[CONTROL_BUFFER_SIZE];
static const int retr_codes[] = {150, 125, 0};
int resp_code, ret;
ret = snprintf(command, sizeof(command), "RETR %s\r\n", s->path);
if (ret >= sizeof(command))
return AVERROR(ENOSYS);
resp_code = ftp_send_command(s, command, retr_codes, NULL);
if (resp_code != 125 && resp_code != 150)
return AVERROR(EIO);
s->state = DOWNLOADING;
return 0;
}
static int ftp_store(FTPContext *s)
{
char command[CONTROL_BUFFER_SIZE];
static const int stor_codes[] = {150, 125, 0};
int resp_code, ret;
ret = snprintf(command, sizeof(command), "STOR %s\r\n", s->path);
if (ret >= sizeof(command))
return AVERROR(ENOSYS);
resp_code = ftp_send_command(s, command, stor_codes, NULL);
if (resp_code != 125 && resp_code != 150)
return AVERROR(EIO);
s->state = UPLOADING;
return 0;
}
static int ftp_type(FTPContext *s)
{
static const char *command = "TYPE I\r\n";
static const int type_codes[] = {200, 0};
if (ftp_send_command(s, command, type_codes, NULL) != 200)
return AVERROR(EIO);
return 0;
}
static int ftp_restart(FTPContext *s, int64_t pos)
{
char command[CONTROL_BUFFER_SIZE];
static const int rest_codes[] = {350, 0};
snprintf(command, sizeof(command), "REST %"PRId64"\r\n", pos);
if (ftp_send_command(s, command, rest_codes, NULL) != 350)
return AVERROR(EIO);
return 0;
}
static int ftp_set_dir(FTPContext *s)
{
static const int cwd_codes[] = {250, 550, 0}; /* 550 is incorrect code */
char command[MAX_URL_SIZE];
int ret;
ret = snprintf(command, sizeof(command), "CWD %s\r\n", s->path);
if (ret >= sizeof(command))
return AVERROR(ENOSYS);
if (ftp_send_command(s, command, cwd_codes, NULL) != 250)
return AVERROR(EIO);
return 0;
}
static int ftp_list_mlsd(FTPContext *s)
{
static const char *command = "MLSD\r\n";
static const int mlsd_codes[] = {150, 500, 0}; /* 500 is incorrect code */
if (ftp_send_command(s, command, mlsd_codes, NULL) != 150)
return AVERROR(ENOSYS);
s->listing_method = MLSD;
return 0;
}
static int ftp_list_nlst(FTPContext *s)
{
static const char *command = "NLST\r\n";
static const int nlst_codes[] = {226, 425, 426, 451, 450, 550, 0};
if (ftp_send_command(s, command, nlst_codes, NULL) != 226)
return AVERROR(ENOSYS);
s->listing_method = NLST;
return 0;
}
static int ftp_list(FTPContext *s)
{
int ret;
s->state = LISTING_DIR;
if ((ret = ftp_list_mlsd(s)) < 0)
ret = ftp_list_nlst(s);
return ret;
}
static int ftp_has_feature(FTPContext *s, const char *feature_name)
{
if (!s->features)
return 0;
return av_stristr(s->features, feature_name) != NULL;
}
static int ftp_features(FTPContext *s)
{
static const char *feat_command = "FEAT\r\n";
static const char *enable_utf8_command = "OPTS UTF8 ON\r\n";
static const int feat_codes[] = {211, 0};
static const int opts_codes[] = {200, 202, 451, 0};
av_freep(&s->features);
if (ftp_send_command(s, feat_command, feat_codes, &s->features) != 211) {
av_freep(&s->features);
}
if (ftp_has_feature(s, "UTF8")) {
int ret = ftp_send_command(s, enable_utf8_command, opts_codes, NULL);
if (ret == 200 || ret == 202)
s->utf8 = 1;
}
return 0;
}
static int ftp_connect_control_connection(URLContext *h)
{
char buf[CONTROL_BUFFER_SIZE], *response = NULL;
int err;
AVDictionary *opts = NULL;
FTPContext *s = h->priv_data;
static const int connect_codes[] = {220, 0};
if (!s->conn_control) {
ff_url_join(buf, sizeof(buf), "tcp", NULL,
s->hostname, s->server_control_port, NULL);
if (s->rw_timeout != -1) {
av_dict_set_int(&opts, "timeout", s->rw_timeout, 0);
} /* if option is not given, don't pass it and let tcp use its own default */
err = ffurl_open_whitelist(&s->conn_control, buf, AVIO_FLAG_READ_WRITE,
&h->interrupt_callback, &opts,
h->protocol_whitelist, h->protocol_blacklist, h);
av_dict_free(&opts);
if (err < 0) {
av_log(h, AV_LOG_ERROR, "Cannot open control connection\n");
return err;
}
/* check if server is ready */
if (ftp_status(s, ((h->flags & AVIO_FLAG_WRITE) ? &response : NULL), connect_codes) != 220) {
av_log(h, AV_LOG_ERROR, "FTP server not ready for new users\n");
return AVERROR(EACCES);
}
if ((h->flags & AVIO_FLAG_WRITE) && av_stristr(response, "pure-ftpd")) {
av_log(h, AV_LOG_WARNING, "Pure-FTPd server is used as an output protocol. It is known issue this implementation may produce incorrect content and it cannot be fixed at this moment.");
}
av_free(response);
if ((err = ftp_auth(s)) < 0) {
av_log(h, AV_LOG_ERROR, "FTP authentication failed\n");
return err;
}
if ((err = ftp_type(s)) < 0) {
av_log(h, AV_LOG_ERROR, "Set content type failed\n");
return err;
}
ftp_features(s);
}
return 0;
}
static int ftp_connect_data_connection(URLContext *h)
{
int err;
char buf[CONTROL_BUFFER_SIZE];
AVDictionary *opts = NULL;
FTPContext *s = h->priv_data;
if (!s->conn_data) {
/* Enter passive mode */
if (ftp_passive_mode_epsv(s) < 0) {
/* Use PASV as fallback */
if ((err = ftp_passive_mode(s)) < 0)
return err;
}
/* Open data connection */
ff_url_join(buf, sizeof(buf), "tcp", NULL, s->hostname, s->server_data_port, NULL);
if (s->rw_timeout != -1) {
av_dict_set_int(&opts, "timeout", s->rw_timeout, 0);
} /* if option is not given, don't pass it and let tcp use its own default */
err = ffurl_open_whitelist(&s->conn_data, buf, h->flags,
&h->interrupt_callback, &opts,
h->protocol_whitelist, h->protocol_blacklist, h);
av_dict_free(&opts);
if (err < 0)
return err;
if (s->position)
if ((err = ftp_restart(s, s->position)) < 0)
return err;
}
s->state = READY;
return 0;
}
static int ftp_abort(URLContext *h)
{
static const char *command = "ABOR\r\n";
int err;
static const int abor_codes[] = {225, 226, 0};
FTPContext *s = h->priv_data;
/* According to RCF 959:
"ABOR command tells the server to abort the previous FTP
service command and any associated transfer of data."
There are FTP server implementations that don't response
to any commands during data transfer in passive mode (including ABOR).
This implementation closes data connection by force.
*/
if (ftp_send_command(s, command, NULL, NULL) < 0) {
ftp_close_both_connections(s);
if ((err = ftp_connect_control_connection(h)) < 0) {
av_log(h, AV_LOG_ERROR, "Reconnect failed.\n");
return err;
}
} else {
ftp_close_data_connection(s);
if (ftp_status(s, NULL, abor_codes) < 225) {
/* wu-ftpd also closes control connection after data connection closing */
ffurl_closep(&s->conn_control);
if ((err = ftp_connect_control_connection(h)) < 0) {
av_log(h, AV_LOG_ERROR, "Reconnect failed.\n");
return err;
}
}
}
return 0;
}
static int ftp_connect(URLContext *h, const char *url)
{
char proto[10], path[MAX_URL_SIZE], credentials[MAX_URL_SIZE], hostname[MAX_URL_SIZE];
const char *tok_user = NULL, *tok_pass = NULL;
char *newpath = NULL;
int err;
FTPContext *s = h->priv_data;
s->state = DISCONNECTED;
s->listing_method = UNKNOWN_METHOD;
s->filesize = -1;
s->position = 0;
s->features = NULL;
av_url_split(proto, sizeof(proto),
credentials, sizeof(credentials),
hostname, sizeof(hostname),
&s->server_control_port,
path, sizeof(path),
url);
if (!*credentials) {
if (!s->option_user) {
tok_user = "anonymous";
tok_pass = av_x_if_null(s->anonymous_password, "nopassword");
} else {
tok_user = s->option_user;
tok_pass = s->option_password;
}
s->user = av_strdup(tok_user);
s->password = av_strdup(tok_pass);
} else {
char *pass = strchr(credentials, ':');
if (pass) {
*pass++ = '\0';
tok_pass = pass;
s->password = ff_urldecode(pass, 0);
} else {
tok_pass = s->option_password;
s->password = av_strdup(tok_pass);
}
s->user = ff_urldecode(credentials, 0);
}
s->hostname = av_strdup(hostname);
if (!s->hostname || !s->user || (tok_pass && !s->password)) {
return AVERROR(ENOMEM);
}
if (s->server_control_port < 0 || s->server_control_port > 65535)
s->server_control_port = 21;
if ((err = ftp_connect_control_connection(h)) < 0)
return err;
if ((err = ftp_current_dir(s)) < 0)
return err;
newpath = av_append_path_component(s->path, path);
if (!newpath)
return AVERROR(ENOMEM);
av_free(s->path);
s->path = newpath;
return 0;
}
static int ftp_open(URLContext *h, const char *url, int flags)
{
FTPContext *s = h->priv_data;
int err;
ff_dlog(h, "ftp protocol open\n");
if ((err = ftp_connect(h, url)) < 0)
goto fail;
if (ftp_restart(s, 0) < 0) {
h->is_streamed = 1;
} else {
ftp_file_size(s);
if (s->write_seekable != 1 && flags & AVIO_FLAG_WRITE)
h->is_streamed = 1;
}
return 0;
fail:
av_log(h, AV_LOG_ERROR, "FTP open failed\n");
ftp_close(h);
return err;
}
static int64_t ftp_seek(URLContext *h, int64_t pos, int whence)
{
FTPContext *s = h->priv_data;
int err;
int64_t new_pos;
ff_dlog(h, "ftp protocol seek %"PRId64" %d\n", pos, whence);
switch(whence) {
case AVSEEK_SIZE:
return s->filesize;
case SEEK_SET:
new_pos = pos;
break;
case SEEK_CUR:
new_pos = s->position + pos;
break;
case SEEK_END:
if (s->filesize < 0)
return AVERROR(EIO);
new_pos = s->filesize + pos;
break;
default:
return AVERROR(EINVAL);
}
if (h->is_streamed)
return AVERROR(EIO);
if (new_pos < 0) {
av_log(h, AV_LOG_ERROR, "Seeking to nagative position.\n");
return AVERROR(EINVAL);
}
if (new_pos != s->position) {
if ((err = ftp_abort(h)) < 0)
return err;
s->position = new_pos;
}
return new_pos;
}
static int ftp_read(URLContext *h, unsigned char *buf, int size)
{
FTPContext *s = h->priv_data;
int read, err, retry_done = 0;
ff_dlog(h, "ftp protocol read %d bytes\n", size);
retry:
if (s->state == ENDOFFILE)
return AVERROR_EOF;
if (s->state == DISCONNECTED) {
if ((err = ftp_connect_data_connection(h)) < 0)
return err;
}
if (s->state == READY) {
if ((err = ftp_retrieve(s)) < 0)
return err;
}
if (s->conn_data && s->state == DOWNLOADING) {
read = ffurl_read(s->conn_data, buf, size);
if (read >= 0) {
s->position += read;
s->filesize = FFMAX(s->filesize, s->position);
}
if (read == AVERROR_EOF) {
static const int retr_codes[] = {226, 250, 425, 426, 451, 0};
char *response = NULL;
err = ftp_status(s, &response, retr_codes);
if (err == 226) {
ftp_close_data_connection(s);
av_freep(&response);
s->state = ENDOFFILE;
return AVERROR_EOF;
}
/* 250 is not allowed, any other status means some kind of error */
av_log(h, AV_LOG_ERROR, "FTP transfer failed: %s\n", response ? response : (err < 0 ? av_err2str(err) : "?"));
av_freep(&response);
read = AVERROR(EIO);
}
if (read <= 0 && !h->is_streamed) {
/* Server closed connection. Probably due to inactivity */
av_log(h, AV_LOG_INFO, "Reconnect to FTP server.\n");
if ((err = ftp_abort(h)) < 0)
return err;
if (!retry_done) {
retry_done = 1;
goto retry;
}
}
return read;
}
av_log(h, AV_LOG_DEBUG, "FTP read failed\n");
return AVERROR(EIO);
}
static int ftp_write(URLContext *h, const unsigned char *buf, int size)
{
int err;
FTPContext *s = h->priv_data;
int written;
ff_dlog(h, "ftp protocol write %d bytes\n", size);
if (s->state == DISCONNECTED) {
if ((err = ftp_connect_data_connection(h)) < 0)
return err;
}
if (s->state == READY) {
if ((err = ftp_store(s)) < 0)
return err;
}
if (s->conn_data && s->state == UPLOADING) {
written = ffurl_write(s->conn_data, buf, size);
if (written > 0) {
s->position += written;
s->filesize = FFMAX(s->filesize, s->position);
}
return written;
}
av_log(h, AV_LOG_ERROR, "FTP write failed\n");
return AVERROR(EIO);
}
static int ftp_close(URLContext *h)
{
FTPContext *s = h->priv_data;
ff_dlog(h, "ftp protocol close\n");
ftp_close_both_connections(s);
av_freep(&s->user);
av_freep(&s->password);
av_freep(&s->hostname);
av_freep(&s->path);
av_freep(&s->features);
return 0;
}
static int ftp_get_file_handle(URLContext *h)
{
FTPContext *s = h->priv_data;
ff_dlog(h, "ftp protocol get_file_handle\n");
if (s->conn_data)
return ffurl_get_file_handle(s->conn_data);
return AVERROR(EIO);
}
static int ftp_shutdown(URLContext *h, int flags)
{
FTPContext *s = h->priv_data;
ff_dlog(h, "ftp protocol shutdown\n");
if (s->conn_data)
return ffurl_shutdown(s->conn_data, flags);
return AVERROR(EIO);
}
static int ftp_open_dir(URLContext *h)
{
FTPContext *s = h->priv_data;
int ret;
if ((ret = ftp_connect(h, h->filename)) < 0)
goto fail;
if ((ret = ftp_set_dir(s)) < 0)
goto fail;
if ((ret = ftp_connect_data_connection(h)) < 0)
goto fail;
if ((ret = ftp_list(s)) < 0)
goto fail;
s->dir_buffer = av_malloc(DIR_BUFFER_SIZE);
if (!s->dir_buffer) {
ret = AVERROR(ENOMEM);
goto fail;
}
s->dir_buffer[0] = 0;
if (s->conn_data && s->state == LISTING_DIR)
return 0;
fail:
ffurl_closep(&s->conn_control);
ffurl_closep(&s->conn_data);
return ret;
}
static int64_t ftp_parse_date(const char *date)
{
struct tm tv;
memset(&tv, 0, sizeof(struct tm));
av_small_strptime(date, "%Y%m%d%H%M%S", &tv);
return INT64_C(1000000) * av_timegm(&tv);
}
static int ftp_parse_entry_nlst(char *line, AVIODirEntry *next)
{
next->name = av_strdup(line);
return 0;
}
static int ftp_parse_entry_mlsd(char *mlsd, AVIODirEntry *next)
{
char *fact, *value;
char *saveptr = NULL, *p = mlsd;
ff_dlog(NULL, "%s\n", mlsd);
while(fact = av_strtok(p, ";", &saveptr)) {
p = NULL;
if (fact[0] == ' ') {
next->name = av_strdup(&fact[1]);
continue;
}
fact = av_strtok(fact, "=", &value);
if (!fact)
continue;
if (!av_strcasecmp(fact, "type")) {
if (!av_strcasecmp(value, "cdir") || !av_strcasecmp(value, "pdir"))
return 1;
if (!av_strcasecmp(value, "dir"))