-
Notifications
You must be signed in to change notification settings - Fork 25.5k
/
imap-send.c
1338 lines (1168 loc) · 28.4 KB
/
imap-send.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
/*
* git-imap-send - drops patches into an imap Drafts folder
* derived from isync/mbsync - mailbox synchronizer
*
* Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
* Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
* Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
* Copyright (C) 2006 Mike McCormack
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "cache.h"
typedef struct store_conf {
char *name;
const char *path; /* should this be here? its interpretation is driver-specific */
char *map_inbox;
char *trash;
unsigned max_size; /* off_t is overkill */
unsigned trash_remote_new:1, trash_only_new:1;
} store_conf_t;
typedef struct string_list {
struct string_list *next;
char string[1];
} string_list_t;
typedef struct channel_conf {
struct channel_conf *next;
char *name;
store_conf_t *master, *slave;
char *master_name, *slave_name;
char *sync_state;
string_list_t *patterns;
int mops, sops;
unsigned max_messages; /* for slave only */
} channel_conf_t;
typedef struct group_conf {
struct group_conf *next;
char *name;
string_list_t *channels;
} group_conf_t;
/* For message->status */
#define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
#define M_DEAD (1<<1) /* expunged */
#define M_FLAGS (1<<2) /* flags fetched */
typedef struct message {
struct message *next;
/* string_list_t *keywords; */
size_t size; /* zero implies "not fetched" */
int uid;
unsigned char flags, status;
} message_t;
typedef struct store {
store_conf_t *conf; /* foreign */
/* currently open mailbox */
const char *name; /* foreign! maybe preset? */
char *path; /* own */
message_t *msgs; /* own */
int uidvalidity;
unsigned char opts; /* maybe preset? */
/* note that the following do _not_ reflect stats from msgs, but mailbox totals */
int count; /* # of messages */
int recent; /* # of recent messages - don't trust this beyond the initial read */
} store_t;
typedef struct {
char *data;
int len;
unsigned char flags;
unsigned int crlf:1;
} msg_data_t;
#define DRV_OK 0
#define DRV_MSG_BAD -1
#define DRV_BOX_BAD -2
#define DRV_STORE_BAD -3
static int Verbose, Quiet;
static void imap_info( const char *, ... );
static void imap_warn( const char *, ... );
static char *next_arg( char ** );
static void free_generic_messages( message_t * );
static int nfsnprintf( char *buf, int blen, const char *fmt, ... );
static int nfvasprintf(char **strp, const char *fmt, va_list ap)
{
int len;
char tmp[8192];
len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
if (len < 0)
die("Fatal: Out of memory\n");
if (len >= sizeof(tmp))
die("imap command overflow !\n");
*strp = xmemdupz(tmp, len);
return len;
}
static void arc4_init( void );
static unsigned char arc4_getbyte( void );
typedef struct imap_server_conf {
char *name;
char *tunnel;
char *host;
int port;
char *user;
char *pass;
} imap_server_conf_t;
typedef struct imap_store_conf {
store_conf_t gen;
imap_server_conf_t *server;
unsigned use_namespace:1;
} imap_store_conf_t;
#define NIL (void*)0x1
#define LIST (void*)0x2
typedef struct _list {
struct _list *next, *child;
char *val;
int len;
} list_t;
typedef struct {
int fd;
} Socket_t;
typedef struct {
Socket_t sock;
int bytes;
int offset;
char buf[1024];
} buffer_t;
struct imap_cmd;
typedef struct imap {
int uidnext; /* from SELECT responses */
list_t *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
unsigned caps, rcaps; /* CAPABILITY results */
/* command queue */
int nexttag, num_in_progress, literal_pending;
struct imap_cmd *in_progress, **in_progress_append;
buffer_t buf; /* this is BIG, so put it last */
} imap_t;
typedef struct imap_store {
store_t gen;
int uidvalidity;
imap_t *imap;
const char *prefix;
unsigned /*currentnc:1,*/ trashnc:1;
} imap_store_t;
struct imap_cmd_cb {
int (*cont)( imap_store_t *ctx, struct imap_cmd *cmd, const char *prompt );
void (*done)( imap_store_t *ctx, struct imap_cmd *cmd, int response);
void *ctx;
char *data;
int dlen;
int uid;
unsigned create:1, trycreate:1;
};
struct imap_cmd {
struct imap_cmd *next;
struct imap_cmd_cb cb;
char *cmd;
int tag;
};
#define CAP(cap) (imap->caps & (1 << (cap)))
enum CAPABILITY {
NOLOGIN = 0,
UIDPLUS,
LITERALPLUS,
NAMESPACE,
};
static const char *cap_list[] = {
"LOGINDISABLED",
"UIDPLUS",
"LITERAL+",
"NAMESPACE",
};
#define RESP_OK 0
#define RESP_NO 1
#define RESP_BAD 2
static int get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd );
static const char *Flags[] = {
"Draft",
"Flagged",
"Answered",
"Seen",
"Deleted",
};
static void
socket_perror( const char *func, Socket_t *sock, int ret )
{
if (ret < 0)
perror( func );
else
fprintf( stderr, "%s: unexpected EOF\n", func );
}
static int
socket_read( Socket_t *sock, char *buf, int len )
{
ssize_t n = xread( sock->fd, buf, len );
if (n <= 0) {
socket_perror( "read", sock, n );
close( sock->fd );
sock->fd = -1;
}
return n;
}
static int
socket_write( Socket_t *sock, const char *buf, int len )
{
int n = write_in_full( sock->fd, buf, len );
if (n != len) {
socket_perror( "write", sock, n );
close( sock->fd );
sock->fd = -1;
}
return n;
}
/* simple line buffering */
static int
buffer_gets( buffer_t * b, char **s )
{
int n;
int start = b->offset;
*s = b->buf + start;
for (;;) {
/* make sure we have enough data to read the \r\n sequence */
if (b->offset + 1 >= b->bytes) {
if (start) {
/* shift down used bytes */
*s = b->buf;
assert( start <= b->bytes );
n = b->bytes - start;
if (n)
memmove(b->buf, b->buf + start, n);
b->offset -= start;
b->bytes = n;
start = 0;
}
n = socket_read( &b->sock, b->buf + b->bytes,
sizeof(b->buf) - b->bytes );
if (n <= 0)
return -1;
b->bytes += n;
}
if (b->buf[b->offset] == '\r') {
assert( b->offset + 1 < b->bytes );
if (b->buf[b->offset + 1] == '\n') {
b->buf[b->offset] = 0; /* terminate the string */
b->offset += 2; /* next line */
if (Verbose)
puts( *s );
return 0;
}
}
b->offset++;
}
/* not reached */
}
static void
imap_info( const char *msg, ... )
{
va_list va;
if (!Quiet) {
va_start( va, msg );
vprintf( msg, va );
va_end( va );
fflush( stdout );
}
}
static void
imap_warn( const char *msg, ... )
{
va_list va;
if (Quiet < 2) {
va_start( va, msg );
vfprintf( stderr, msg, va );
va_end( va );
}
}
static char *
next_arg( char **s )
{
char *ret;
if (!s || !*s)
return NULL;
while (isspace( (unsigned char) **s ))
(*s)++;
if (!**s) {
*s = NULL;
return NULL;
}
if (**s == '"') {
++*s;
ret = *s;
*s = strchr( *s, '"' );
} else {
ret = *s;
while (**s && !isspace( (unsigned char) **s ))
(*s)++;
}
if (*s) {
if (**s)
*(*s)++ = 0;
if (!**s)
*s = NULL;
}
return ret;
}
static void
free_generic_messages( message_t *msgs )
{
message_t *tmsg;
for (; msgs; msgs = tmsg) {
tmsg = msgs->next;
free( msgs );
}
}
static int
nfsnprintf( char *buf, int blen, const char *fmt, ... )
{
int ret;
va_list va;
va_start( va, fmt );
if (blen <= 0 || (unsigned)(ret = vsnprintf( buf, blen, fmt, va )) >= (unsigned)blen)
die( "Fatal: buffer too small. Please report a bug.\n");
va_end( va );
return ret;
}
static struct {
unsigned char i, j, s[256];
} rs;
static void
arc4_init( void )
{
int i, fd;
unsigned char j, si, dat[128];
if ((fd = open( "/dev/urandom", O_RDONLY )) < 0 && (fd = open( "/dev/random", O_RDONLY )) < 0) {
fprintf( stderr, "Fatal: no random number source available.\n" );
exit( 3 );
}
if (read_in_full( fd, dat, 128 ) != 128) {
fprintf( stderr, "Fatal: cannot read random number source.\n" );
exit( 3 );
}
close( fd );
for (i = 0; i < 256; i++)
rs.s[i] = i;
for (i = j = 0; i < 256; i++) {
si = rs.s[i];
j += si + dat[i & 127];
rs.s[i] = rs.s[j];
rs.s[j] = si;
}
rs.i = rs.j = 0;
for (i = 0; i < 256; i++)
arc4_getbyte();
}
static unsigned char
arc4_getbyte( void )
{
unsigned char si, sj;
rs.i++;
si = rs.s[rs.i];
rs.j += si;
sj = rs.s[rs.j];
rs.s[rs.i] = sj;
rs.s[rs.j] = si;
return rs.s[(si + sj) & 0xff];
}
static struct imap_cmd *
v_issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb,
const char *fmt, va_list ap )
{
imap_t *imap = ctx->imap;
struct imap_cmd *cmd;
int n, bufl;
char buf[1024];
cmd = xmalloc( sizeof(struct imap_cmd) );
nfvasprintf( &cmd->cmd, fmt, ap );
cmd->tag = ++imap->nexttag;
if (cb)
cmd->cb = *cb;
else
memset( &cmd->cb, 0, sizeof(cmd->cb) );
while (imap->literal_pending)
get_cmd_result( ctx, NULL );
bufl = nfsnprintf( buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
"%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
cmd->tag, cmd->cmd, cmd->cb.dlen );
if (Verbose) {
if (imap->num_in_progress)
printf( "(%d in progress) ", imap->num_in_progress );
if (memcmp( cmd->cmd, "LOGIN", 5 ))
printf( ">>> %s", buf );
else
printf( ">>> %d LOGIN <user> <pass>\n", cmd->tag );
}
if (socket_write( &imap->buf.sock, buf, bufl ) != bufl) {
free( cmd->cmd );
free( cmd );
if (cb && cb->data)
free( cb->data );
return NULL;
}
if (cmd->cb.data) {
if (CAP(LITERALPLUS)) {
n = socket_write( &imap->buf.sock, cmd->cb.data, cmd->cb.dlen );
free( cmd->cb.data );
if (n != cmd->cb.dlen ||
(n = socket_write( &imap->buf.sock, "\r\n", 2 )) != 2)
{
free( cmd->cmd );
free( cmd );
return NULL;
}
cmd->cb.data = NULL;
} else
imap->literal_pending = 1;
} else if (cmd->cb.cont)
imap->literal_pending = 1;
cmd->next = NULL;
*imap->in_progress_append = cmd;
imap->in_progress_append = &cmd->next;
imap->num_in_progress++;
return cmd;
}
static struct imap_cmd *
issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
struct imap_cmd *ret;
va_list ap;
va_start( ap, fmt );
ret = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
return ret;
}
static int
imap_exec( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
va_list ap;
struct imap_cmd *cmdp;
va_start( ap, fmt );
cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
if (!cmdp)
return RESP_BAD;
return get_cmd_result( ctx, cmdp );
}
static int
imap_exec_m( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
{
va_list ap;
struct imap_cmd *cmdp;
va_start( ap, fmt );
cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
va_end( ap );
if (!cmdp)
return DRV_STORE_BAD;
switch (get_cmd_result( ctx, cmdp )) {
case RESP_BAD: return DRV_STORE_BAD;
case RESP_NO: return DRV_MSG_BAD;
default: return DRV_OK;
}
}
static int
is_atom( list_t *list )
{
return list && list->val && list->val != NIL && list->val != LIST;
}
static int
is_list( list_t *list )
{
return list && list->val == LIST;
}
static void
free_list( list_t *list )
{
list_t *tmp;
for (; list; list = tmp) {
tmp = list->next;
if (is_list( list ))
free_list( list->child );
else if (is_atom( list ))
free( list->val );
free( list );
}
}
static int
parse_imap_list_l( imap_t *imap, char **sp, list_t **curp, int level )
{
list_t *cur;
char *s = *sp, *p;
int n, bytes;
for (;;) {
while (isspace( (unsigned char)*s ))
s++;
if (level && *s == ')') {
s++;
break;
}
*curp = cur = xmalloc( sizeof(*cur) );
curp = &cur->next;
cur->val = NULL; /* for clean bail */
if (*s == '(') {
/* sublist */
s++;
cur->val = LIST;
if (parse_imap_list_l( imap, &s, &cur->child, level + 1 ))
goto bail;
} else if (imap && *s == '{') {
/* literal */
bytes = cur->len = strtol( s + 1, &s, 10 );
if (*s != '}')
goto bail;
s = cur->val = xmalloc( cur->len );
/* dump whats left over in the input buffer */
n = imap->buf.bytes - imap->buf.offset;
if (n > bytes)
/* the entire message fit in the buffer */
n = bytes;
memcpy( s, imap->buf.buf + imap->buf.offset, n );
s += n;
bytes -= n;
/* mark that we used part of the buffer */
imap->buf.offset += n;
/* now read the rest of the message */
while (bytes > 0) {
if ((n = socket_read (&imap->buf.sock, s, bytes)) <= 0)
goto bail;
s += n;
bytes -= n;
}
if (buffer_gets( &imap->buf, &s ))
goto bail;
} else if (*s == '"') {
/* quoted string */
s++;
p = s;
for (; *s != '"'; s++)
if (!*s)
goto bail;
cur->len = s - p;
s++;
cur->val = xmemdupz(p, cur->len);
} else {
/* atom */
p = s;
for (; *s && !isspace( (unsigned char)*s ); s++)
if (level && *s == ')')
break;
cur->len = s - p;
if (cur->len == 3 && !memcmp ("NIL", p, 3)) {
cur->val = NIL;
} else {
cur->val = xmemdupz(p, cur->len);
}
}
if (!level)
break;
if (!*s)
goto bail;
}
*sp = s;
*curp = NULL;
return 0;
bail:
*curp = NULL;
return -1;
}
static list_t *
parse_imap_list( imap_t *imap, char **sp )
{
list_t *head;
if (!parse_imap_list_l( imap, sp, &head, 0 ))
return head;
free_list( head );
return NULL;
}
static list_t *
parse_list( char **sp )
{
return parse_imap_list( NULL, sp );
}
static void
parse_capability( imap_t *imap, char *cmd )
{
char *arg;
unsigned i;
imap->caps = 0x80000000;
while ((arg = next_arg( &cmd )))
for (i = 0; i < ARRAY_SIZE(cap_list); i++)
if (!strcmp( cap_list[i], arg ))
imap->caps |= 1 << i;
imap->rcaps = imap->caps;
}
static int
parse_response_code( imap_store_t *ctx, struct imap_cmd_cb *cb, char *s )
{
imap_t *imap = ctx->imap;
char *arg, *p;
if (*s != '[')
return RESP_OK; /* no response code */
s++;
if (!(p = strchr( s, ']' ))) {
fprintf( stderr, "IMAP error: malformed response code\n" );
return RESP_BAD;
}
*p++ = 0;
arg = next_arg( &s );
if (!strcmp( "UIDVALIDITY", arg )) {
if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg ))) {
fprintf( stderr, "IMAP error: malformed UIDVALIDITY status\n" );
return RESP_BAD;
}
} else if (!strcmp( "UIDNEXT", arg )) {
if (!(arg = next_arg( &s )) || !(imap->uidnext = atoi( arg ))) {
fprintf( stderr, "IMAP error: malformed NEXTUID status\n" );
return RESP_BAD;
}
} else if (!strcmp( "CAPABILITY", arg )) {
parse_capability( imap, s );
} else if (!strcmp( "ALERT", arg )) {
/* RFC2060 says that these messages MUST be displayed
* to the user
*/
for (; isspace( (unsigned char)*p ); p++);
fprintf( stderr, "*** IMAP ALERT *** %s\n", p );
} else if (cb && cb->ctx && !strcmp( "APPENDUID", arg )) {
if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg )) ||
!(arg = next_arg( &s )) || !(*(int *)cb->ctx = atoi( arg )))
{
fprintf( stderr, "IMAP error: malformed APPENDUID status\n" );
return RESP_BAD;
}
}
return RESP_OK;
}
static int
get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd )
{
imap_t *imap = ctx->imap;
struct imap_cmd *cmdp, **pcmdp, *ncmdp;
char *cmd, *arg, *arg1, *p;
int n, resp, resp2, tag;
for (;;) {
if (buffer_gets( &imap->buf, &cmd ))
return RESP_BAD;
arg = next_arg( &cmd );
if (*arg == '*') {
arg = next_arg( &cmd );
if (!arg) {
fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
return RESP_BAD;
}
if (!strcmp( "NAMESPACE", arg )) {
imap->ns_personal = parse_list( &cmd );
imap->ns_other = parse_list( &cmd );
imap->ns_shared = parse_list( &cmd );
} else if (!strcmp( "OK", arg ) || !strcmp( "BAD", arg ) ||
!strcmp( "NO", arg ) || !strcmp( "BYE", arg )) {
if ((resp = parse_response_code( ctx, NULL, cmd )) != RESP_OK)
return resp;
} else if (!strcmp( "CAPABILITY", arg ))
parse_capability( imap, cmd );
else if ((arg1 = next_arg( &cmd ))) {
if (!strcmp( "EXISTS", arg1 ))
ctx->gen.count = atoi( arg );
else if (!strcmp( "RECENT", arg1 ))
ctx->gen.recent = atoi( arg );
} else {
fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
return RESP_BAD;
}
} else if (!imap->in_progress) {
fprintf( stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "" );
return RESP_BAD;
} else if (*arg == '+') {
/* This can happen only with the last command underway, as
it enforces a round-trip. */
cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
offsetof(struct imap_cmd, next));
if (cmdp->cb.data) {
n = socket_write( &imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen );
free( cmdp->cb.data );
cmdp->cb.data = NULL;
if (n != (int)cmdp->cb.dlen)
return RESP_BAD;
} else if (cmdp->cb.cont) {
if (cmdp->cb.cont( ctx, cmdp, cmd ))
return RESP_BAD;
} else {
fprintf( stderr, "IMAP error: unexpected command continuation request\n" );
return RESP_BAD;
}
if (socket_write( &imap->buf.sock, "\r\n", 2 ) != 2)
return RESP_BAD;
if (!cmdp->cb.cont)
imap->literal_pending = 0;
if (!tcmd)
return DRV_OK;
} else {
tag = atoi( arg );
for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
if (cmdp->tag == tag)
goto gottag;
fprintf( stderr, "IMAP error: unexpected tag %s\n", arg );
return RESP_BAD;
gottag:
if (!(*pcmdp = cmdp->next))
imap->in_progress_append = pcmdp;
imap->num_in_progress--;
if (cmdp->cb.cont || cmdp->cb.data)
imap->literal_pending = 0;
arg = next_arg( &cmd );
if (!strcmp( "OK", arg ))
resp = DRV_OK;
else {
if (!strcmp( "NO", arg )) {
if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp( cmd, "[TRYCREATE]", 11 ))) { /* SELECT, APPEND or UID COPY */
p = strchr( cmdp->cmd, '"' );
if (!issue_imap_cmd( ctx, NULL, "CREATE \"%.*s\"", strchr( p + 1, '"' ) - p + 1, p )) {
resp = RESP_BAD;
goto normal;
}
/* not waiting here violates the spec, but a server that does not
grok this nonetheless violates it too. */
cmdp->cb.create = 0;
if (!(ncmdp = issue_imap_cmd( ctx, &cmdp->cb, "%s", cmdp->cmd ))) {
resp = RESP_BAD;
goto normal;
}
free( cmdp->cmd );
free( cmdp );
if (!tcmd)
return 0; /* ignored */
if (cmdp == tcmd)
tcmd = ncmdp;
continue;
}
resp = RESP_NO;
} else /*if (!strcmp( "BAD", arg ))*/
resp = RESP_BAD;
fprintf( stderr, "IMAP command '%s' returned response (%s) - %s\n",
memcmp (cmdp->cmd, "LOGIN", 5) ?
cmdp->cmd : "LOGIN <user> <pass>",
arg, cmd ? cmd : "");
}
if ((resp2 = parse_response_code( ctx, &cmdp->cb, cmd )) > resp)
resp = resp2;
normal:
if (cmdp->cb.done)
cmdp->cb.done( ctx, cmdp, resp );
if (cmdp->cb.data)
free( cmdp->cb.data );
free( cmdp->cmd );
free( cmdp );
if (!tcmd || tcmd == cmdp)
return resp;
}
}
/* not reached */
}
static void
imap_close_server( imap_store_t *ictx )
{
imap_t *imap = ictx->imap;
if (imap->buf.sock.fd != -1) {
imap_exec( ictx, NULL, "LOGOUT" );
close( imap->buf.sock.fd );
}
free_list( imap->ns_personal );
free_list( imap->ns_other );
free_list( imap->ns_shared );
free( imap );
}
static void
imap_close_store( store_t *ctx )
{
imap_close_server( (imap_store_t *)ctx );
free_generic_messages( ctx->msgs );
free( ctx );
}
static store_t *
imap_open_store( imap_server_conf_t *srvc )
{
imap_store_t *ctx;
imap_t *imap;
char *arg, *rsp;
struct hostent *he;
struct sockaddr_in addr;
int s, a[2], preauth;
pid_t pid;
ctx = xcalloc( sizeof(*ctx), 1 );
ctx->imap = imap = xcalloc( sizeof(*imap), 1 );
imap->buf.sock.fd = -1;
imap->in_progress_append = &imap->in_progress;
/* open connection to IMAP server */
if (srvc->tunnel) {
imap_info( "Starting tunnel '%s'... ", srvc->tunnel );
if (socketpair( PF_UNIX, SOCK_STREAM, 0, a )) {
perror( "socketpair" );
exit( 1 );
}
pid = fork();
if (pid < 0)
_exit( 127 );
if (!pid) {
if (dup2( a[0], 0 ) == -1 || dup2( a[0], 1 ) == -1)
_exit( 127 );
close( a[0] );
close( a[1] );
execl( "/bin/sh", "sh", "-c", srvc->tunnel, NULL );
_exit( 127 );
}
close (a[0]);
imap->buf.sock.fd = a[1];
imap_info( "ok\n" );
} else {
memset( &addr, 0, sizeof(addr) );
addr.sin_port = htons( srvc->port );
addr.sin_family = AF_INET;
imap_info( "Resolving %s... ", srvc->host );
he = gethostbyname( srvc->host );
if (!he) {
perror( "gethostbyname" );
goto bail;
}
imap_info( "ok\n" );
addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
s = socket( PF_INET, SOCK_STREAM, 0 );
imap_info( "Connecting to %s:%hu... ", inet_ntoa( addr.sin_addr ), ntohs( addr.sin_port ) );
if (connect( s, (struct sockaddr *)&addr, sizeof(addr) )) {
close( s );
perror( "connect" );
goto bail;
}
imap_info( "ok\n" );
imap->buf.sock.fd = s;
}
/* read the greeting string */
if (buffer_gets( &imap->buf, &rsp )) {
fprintf( stderr, "IMAP error: no greeting response\n" );
goto bail;
}
arg = next_arg( &rsp );
if (!arg || *arg != '*' || (arg = next_arg( &rsp )) == NULL) {
fprintf( stderr, "IMAP error: invalid greeting response\n" );
goto bail;
}
preauth = 0;
if (!strcmp( "PREAUTH", arg ))
preauth = 1;
else if (strcmp( "OK", arg ) != 0) {
fprintf( stderr, "IMAP error: unknown greeting response\n" );
goto bail;
}
parse_response_code( ctx, NULL, rsp );
if (!imap->caps && imap_exec( ctx, NULL, "CAPABILITY" ) != RESP_OK)
goto bail;
if (!preauth) {
imap_info ("Logging in...\n");
if (!srvc->user) {
fprintf( stderr, "Skipping server %s, no user\n", srvc->host );
goto bail;
}
if (!srvc->pass) {
char prompt[80];
sprintf( prompt, "Password (%s@%s): ", srvc->user, srvc->host );
arg = getpass( prompt );
if (!arg) {