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Merge branch 'jc/thin' into next
[git/trast.git] / imap-send.c
blobe33c78bff2536089676c9d82df3382926ac1196d
1 /*
2 * git-imap-send - drops patches into an imap Drafts folder
3 * derived from isync/mbsync - mailbox synchronizer
4 *
5 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
6 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
7 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
8 * Copyright (C) 2006 Mike McCormack
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25 #include "cache.h"
26
27 #include <assert.h>
28 #include <netinet/in.h>
29 #include <netinet/tcp.h>
30 #include <arpa/inet.h>
31 #include <sys/socket.h>
32 #include <netdb.h>
33
34 typedef struct store_conf {
35 char *name;
36 const char *path; /* should this be here? its interpretation is driver-specific */
37 char *map_inbox;
38 char *trash;
39 unsigned max_size; /* off_t is overkill */
40 unsigned trash_remote_new:1, trash_only_new:1;
41 } store_conf_t;
42
43 typedef struct string_list {
44 struct string_list *next;
45 char string[1];
46 } string_list_t;
47
48 typedef struct channel_conf {
49 struct channel_conf *next;
50 char *name;
51 store_conf_t *master, *slave;
52 char *master_name, *slave_name;
53 char *sync_state;
54 string_list_t *patterns;
55 int mops, sops;
56 unsigned max_messages; /* for slave only */
57 } channel_conf_t;
58
59 typedef struct group_conf {
60 struct group_conf *next;
61 char *name;
62 string_list_t *channels;
63 } group_conf_t;
64
65 /* For message->status */
66 #define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
67 #define M_DEAD (1<<1) /* expunged */
68 #define M_FLAGS (1<<2) /* flags fetched */
69
70 typedef struct message {
71 struct message *next;
72 /* string_list_t *keywords; */
73 size_t size; /* zero implies "not fetched" */
74 int uid;
75 unsigned char flags, status;
76 } message_t;
77
78 typedef struct store {
79 store_conf_t *conf; /* foreign */
80
81 /* currently open mailbox */
82 const char *name; /* foreign! maybe preset? */
83 char *path; /* own */
84 message_t *msgs; /* own */
85 int uidvalidity;
86 unsigned char opts; /* maybe preset? */
87 /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
88 int count; /* # of messages */
89 int recent; /* # of recent messages - don't trust this beyond the initial read */
90 } store_t;
91
92 typedef struct {
93 char *data;
94 int len;
95 unsigned char flags;
96 unsigned char crlf:1;
97 } msg_data_t;
98
99 #define DRV_OK 0
100 #define DRV_MSG_BAD -1
101 #define DRV_BOX_BAD -2
102 #define DRV_STORE_BAD -3
103
104 static int Verbose, Quiet;
105
106 static void info( const char *, ... );
107 static void warn( const char *, ... );
108
109 static char *next_arg( char ** );
110
111 static void free_generic_messages( message_t * );
112
113 static int nfvasprintf( char **str, const char *fmt, va_list va );
114 static int nfsnprintf( char *buf, int blen, const char *fmt, ... );
115
116
117 static void arc4_init( void );
118 static unsigned char arc4_getbyte( void );
119
120 typedef struct imap_server_conf {
121 char *name;
122 char *tunnel;
123 char *host;
124 int port;
125 char *user;
126 char *pass;
127 } imap_server_conf_t;
128
129 typedef struct imap_store_conf {
130 store_conf_t gen;
131 imap_server_conf_t *server;
132 unsigned use_namespace:1;
133 } imap_store_conf_t;
134
135 #define NIL (void*)0x1
136 #define LIST (void*)0x2
137
138 typedef struct _list {
139 struct _list *next, *child;
140 char *val;
141 int len;
142 } list_t;
143
144 typedef struct {
145 int fd;
146 } Socket_t;
147
148 typedef struct {
149 Socket_t sock;
150 int bytes;
151 int offset;
152 char buf[1024];
153 } buffer_t;
154
155 struct imap_cmd;
156
157 typedef struct imap {
158 int uidnext; /* from SELECT responses */
159 list_t *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
160 unsigned caps, rcaps; /* CAPABILITY results */
161 /* command queue */
162 int nexttag, num_in_progress, literal_pending;
163 struct imap_cmd *in_progress, **in_progress_append;
164 buffer_t buf; /* this is BIG, so put it last */
165 } imap_t;
166
167 typedef struct imap_store {
168 store_t gen;
169 int uidvalidity;
170 imap_t *imap;
171 const char *prefix;
172 unsigned /*currentnc:1,*/ trashnc:1;
173 } imap_store_t;
174
175 struct imap_cmd_cb {
176 int (*cont)( imap_store_t *ctx, struct imap_cmd *cmd, const char *prompt );
177 void (*done)( imap_store_t *ctx, struct imap_cmd *cmd, int response);
178 void *ctx;
179 char *data;
180 int dlen;
181 int uid;
182 unsigned create:1, trycreate:1;
183 };
184
185 struct imap_cmd {
186 struct imap_cmd *next;
187 struct imap_cmd_cb cb;
188 char *cmd;
189 int tag;
190 };
191
192 #define CAP(cap) (imap->caps & (1 << (cap)))
193
194 enum CAPABILITY {
195 NOLOGIN = 0,
196 UIDPLUS,
197 LITERALPLUS,
198 NAMESPACE,
199 };
200
201 static const char *cap_list[] = {
202 "LOGINDISABLED",
203 "UIDPLUS",
204 "LITERAL+",
205 "NAMESPACE",
206 };
207
208 #define RESP_OK 0
209 #define RESP_NO 1
210 #define RESP_BAD 2
211
212 static int get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd );
213
214
215 static const char *Flags[] = {
216 "Draft",
217 "Flagged",
218 "Answered",
219 "Seen",
220 "Deleted",
221 };
222
223 static void
224 socket_perror( const char *func, Socket_t *sock, int ret )
225 {
226 if (ret < 0)
227 perror( func );
228 else
229 fprintf( stderr, "%s: unexpected EOF\n", func );
230 }
231
232 static int
233 socket_read( Socket_t *sock, char *buf, int len )
234 {
235 int n = read( sock->fd, buf, len );
236 if (n <= 0) {
237 socket_perror( "read", sock, n );
238 close( sock->fd );
239 sock->fd = -1;
240 }
241 return n;
242 }
243
244 static int
245 socket_write( Socket_t *sock, char *buf, int len )
246 {
247 int n = write( sock->fd, buf, len );
248 if (n != len) {
249 socket_perror( "write", sock, n );
250 close( sock->fd );
251 sock->fd = -1;
252 }
253 return n;
254 }
255
256 /* simple line buffering */
257 static int
258 buffer_gets( buffer_t * b, char **s )
259 {
260 int n;
261 int start = b->offset;
262
263 *s = b->buf + start;
264
265 for (;;) {
266 /* make sure we have enough data to read the \r\n sequence */
267 if (b->offset + 1 >= b->bytes) {
268 if (start) {
269 /* shift down used bytes */
270 *s = b->buf;
271
272 assert( start <= b->bytes );
273 n = b->bytes - start;
274
275 if (n)
276 memcpy( b->buf, b->buf + start, n );
277 b->offset -= start;
278 b->bytes = n;
279 start = 0;
280 }
281
282 n = socket_read( &b->sock, b->buf + b->bytes,
283 sizeof(b->buf) - b->bytes );
284
285 if (n <= 0)
286 return -1;
287
288 b->bytes += n;
289 }
290
291 if (b->buf[b->offset] == '\r') {
292 assert( b->offset + 1 < b->bytes );
293 if (b->buf[b->offset + 1] == '\n') {
294 b->buf[b->offset] = 0; /* terminate the string */
295 b->offset += 2; /* next line */
296 if (Verbose)
297 puts( *s );
298 return 0;
299 }
300 }
301
302 b->offset++;
303 }
304 /* not reached */
305 }
306
307 static void
308 info( const char *msg, ... )
309 {
310 va_list va;
311
312 if (!Quiet) {
313 va_start( va, msg );
314 vprintf( msg, va );
315 va_end( va );
316 fflush( stdout );
317 }
318 }
319
320 static void
321 warn( const char *msg, ... )
322 {
323 va_list va;
324
325 if (Quiet < 2) {
326 va_start( va, msg );
327 vfprintf( stderr, msg, va );
328 va_end( va );
329 }
330 }
331
332 static char *
333 next_arg( char **s )
334 {
335 char *ret;
336
337 if (!s || !*s)
338 return 0;
339 while (isspace( (unsigned char) **s ))
340 (*s)++;
341 if (!**s) {
342 *s = 0;
343 return 0;
344 }
345 if (**s == '"') {
346 ++*s;
347 ret = *s;
348 *s = strchr( *s, '"' );
349 } else {
350 ret = *s;
351 while (**s && !isspace( (unsigned char) **s ))
352 (*s)++;
353 }
354 if (*s) {
355 if (**s)
356 *(*s)++ = 0;
357 if (!**s)
358 *s = 0;
359 }
360 return ret;
361 }
362
363 static void
364 free_generic_messages( message_t *msgs )
365 {
366 message_t *tmsg;
367
368 for (; msgs; msgs = tmsg) {
369 tmsg = msgs->next;
370 free( msgs );
371 }
372 }
373
374 static int
375 git_vasprintf( char **strp, const char *fmt, va_list ap )
376 {
377 int len;
378 char tmp[1024];
379
380 if ((len = vsnprintf( tmp, sizeof(tmp), fmt, ap )) < 0 || !(*strp = xmalloc( len + 1 )))
381 return -1;
382 if (len >= (int)sizeof(tmp))
383 vsprintf( *strp, fmt, ap );
384 else
385 memcpy( *strp, tmp, len + 1 );
386 return len;
387 }
388
389 static int
390 nfsnprintf( char *buf, int blen, const char *fmt, ... )
391 {
392 int ret;
393 va_list va;
394
395 va_start( va, fmt );
396 if (blen <= 0 || (unsigned)(ret = vsnprintf( buf, blen, fmt, va )) >= (unsigned)blen)
397 die( "Fatal: buffer too small. Please report a bug.\n");
398 va_end( va );
399 return ret;
400 }
401
402 static int
403 nfvasprintf( char **str, const char *fmt, va_list va )
404 {
405 int ret = git_vasprintf( str, fmt, va );
406 if (ret < 0)
407 die( "Fatal: Out of memory\n");
408 return ret;
409 }
410
411 static struct {
412 unsigned char i, j, s[256];
413 } rs;
414
415 static void
416 arc4_init( void )
417 {
418 int i, fd;
419 unsigned char j, si, dat[128];
420
421 if ((fd = open( "/dev/urandom", O_RDONLY )) < 0 && (fd = open( "/dev/random", O_RDONLY )) < 0) {
422 fprintf( stderr, "Fatal: no random number source available.\n" );
423 exit( 3 );
424 }
425 if (read( fd, dat, 128 ) != 128) {
426 fprintf( stderr, "Fatal: cannot read random number source.\n" );
427 exit( 3 );
428 }
429 close( fd );
430
431 for (i = 0; i < 256; i++)
432 rs.s[i] = i;
433 for (i = j = 0; i < 256; i++) {
434 si = rs.s[i];
435 j += si + dat[i & 127];
436 rs.s[i] = rs.s[j];
437 rs.s[j] = si;
438 }
439 rs.i = rs.j = 0;
440
441 for (i = 0; i < 256; i++)
442 arc4_getbyte();
443 }
444
445 static unsigned char
446 arc4_getbyte( void )
447 {
448 unsigned char si, sj;
449
450 rs.i++;
451 si = rs.s[rs.i];
452 rs.j += si;
453 sj = rs.s[rs.j];
454 rs.s[rs.i] = sj;
455 rs.s[rs.j] = si;
456 return rs.s[(si + sj) & 0xff];
457 }
458
459 static struct imap_cmd *
460 v_issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb,
461 const char *fmt, va_list ap )
462 {
463 imap_t *imap = ctx->imap;
464 struct imap_cmd *cmd;
465 int n, bufl;
466 char buf[1024];
467
468 cmd = xmalloc( sizeof(struct imap_cmd) );
469 nfvasprintf( &cmd->cmd, fmt, ap );
470 cmd->tag = ++imap->nexttag;
471
472 if (cb)
473 cmd->cb = *cb;
474 else
475 memset( &cmd->cb, 0, sizeof(cmd->cb) );
476
477 while (imap->literal_pending)
478 get_cmd_result( ctx, 0 );
479
480 bufl = nfsnprintf( buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
481 "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
482 cmd->tag, cmd->cmd, cmd->cb.dlen );
483 if (Verbose) {
484 if (imap->num_in_progress)
485 printf( "(%d in progress) ", imap->num_in_progress );
486 if (memcmp( cmd->cmd, "LOGIN", 5 ))
487 printf( ">>> %s", buf );
488 else
489 printf( ">>> %d LOGIN <user> <pass>\n", cmd->tag );
490 }
491 if (socket_write( &imap->buf.sock, buf, bufl ) != bufl) {
492 free( cmd->cmd );
493 free( cmd );
494 if (cb && cb->data)
495 free( cb->data );
496 return NULL;
497 }
498 if (cmd->cb.data) {
499 if (CAP(LITERALPLUS)) {
500 n = socket_write( &imap->buf.sock, cmd->cb.data, cmd->cb.dlen );
501 free( cmd->cb.data );
502 if (n != cmd->cb.dlen ||
503 (n = socket_write( &imap->buf.sock, "\r\n", 2 )) != 2)
504 {
505 free( cmd->cmd );
506 free( cmd );
507 return NULL;
508 }
509 cmd->cb.data = 0;
510 } else
511 imap->literal_pending = 1;
512 } else if (cmd->cb.cont)
513 imap->literal_pending = 1;
514 cmd->next = 0;
515 *imap->in_progress_append = cmd;
516 imap->in_progress_append = &cmd->next;
517 imap->num_in_progress++;
518 return cmd;
519 }
520
521 static struct imap_cmd *
522 issue_imap_cmd( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
523 {
524 struct imap_cmd *ret;
525 va_list ap;
526
527 va_start( ap, fmt );
528 ret = v_issue_imap_cmd( ctx, cb, fmt, ap );
529 va_end( ap );
530 return ret;
531 }
532
533 static int
534 imap_exec( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
535 {
536 va_list ap;
537 struct imap_cmd *cmdp;
538
539 va_start( ap, fmt );
540 cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
541 va_end( ap );
542 if (!cmdp)
543 return RESP_BAD;
544
545 return get_cmd_result( ctx, cmdp );
546 }
547
548 static int
549 imap_exec_m( imap_store_t *ctx, struct imap_cmd_cb *cb, const char *fmt, ... )
550 {
551 va_list ap;
552 struct imap_cmd *cmdp;
553
554 va_start( ap, fmt );
555 cmdp = v_issue_imap_cmd( ctx, cb, fmt, ap );
556 va_end( ap );
557 if (!cmdp)
558 return DRV_STORE_BAD;
559
560 switch (get_cmd_result( ctx, cmdp )) {
561 case RESP_BAD: return DRV_STORE_BAD;
562 case RESP_NO: return DRV_MSG_BAD;
563 default: return DRV_OK;
564 }
565 }
566
567 static int
568 is_atom( list_t *list )
569 {
570 return list && list->val && list->val != NIL && list->val != LIST;
571 }
572
573 static int
574 is_list( list_t *list )
575 {
576 return list && list->val == LIST;
577 }
578
579 static void
580 free_list( list_t *list )
581 {
582 list_t *tmp;
583
584 for (; list; list = tmp) {
585 tmp = list->next;
586 if (is_list( list ))
587 free_list( list->child );
588 else if (is_atom( list ))
589 free( list->val );
590 free( list );
591 }
592 }
593
594 static int
595 parse_imap_list_l( imap_t *imap, char **sp, list_t **curp, int level )
596 {
597 list_t *cur;
598 char *s = *sp, *p;
599 int n, bytes;
600
601 for (;;) {
602 while (isspace( (unsigned char)*s ))
603 s++;
604 if (level && *s == ')') {
605 s++;
606 break;
607 }
608 *curp = cur = xmalloc( sizeof(*cur) );
609 curp = &cur->next;
610 cur->val = 0; /* for clean bail */
611 if (*s == '(') {
612 /* sublist */
613 s++;
614 cur->val = LIST;
615 if (parse_imap_list_l( imap, &s, &cur->child, level + 1 ))
616 goto bail;
617 } else if (imap && *s == '{') {
618 /* literal */
619 bytes = cur->len = strtol( s + 1, &s, 10 );
620 if (*s != '}')
621 goto bail;
622
623 s = cur->val = xmalloc( cur->len );
624
625 /* dump whats left over in the input buffer */
626 n = imap->buf.bytes - imap->buf.offset;
627
628 if (n > bytes)
629 /* the entire message fit in the buffer */
630 n = bytes;
631
632 memcpy( s, imap->buf.buf + imap->buf.offset, n );
633 s += n;
634 bytes -= n;
635
636 /* mark that we used part of the buffer */
637 imap->buf.offset += n;
638
639 /* now read the rest of the message */
640 while (bytes > 0) {
641 if ((n = socket_read (&imap->buf.sock, s, bytes)) <= 0)
642 goto bail;
643 s += n;
644 bytes -= n;
645 }
646
647 if (buffer_gets( &imap->buf, &s ))
648 goto bail;
649 } else if (*s == '"') {
650 /* quoted string */
651 s++;
652 p = s;
653 for (; *s != '"'; s++)
654 if (!*s)
655 goto bail;
656 cur->len = s - p;
657 s++;
658 cur->val = xmalloc( cur->len + 1 );
659 memcpy( cur->val, p, cur->len );
660 cur->val[cur->len] = 0;
661 } else {
662 /* atom */
663 p = s;
664 for (; *s && !isspace( (unsigned char)*s ); s++)
665 if (level && *s == ')')
666 break;
667 cur->len = s - p;
668 if (cur->len == 3 && !memcmp ("NIL", p, 3))
669 cur->val = NIL;
670 else {
671 cur->val = xmalloc( cur->len + 1 );
672 memcpy( cur->val, p, cur->len );
673 cur->val[cur->len] = 0;
674 }
675 }
676
677 if (!level)
678 break;
679 if (!*s)
680 goto bail;
681 }
682 *sp = s;
683 *curp = 0;
684 return 0;
685
686 bail:
687 *curp = 0;
688 return -1;
689 }
690
691 static list_t *
692 parse_imap_list( imap_t *imap, char **sp )
693 {
694 list_t *head;
695
696 if (!parse_imap_list_l( imap, sp, &head, 0 ))
697 return head;
698 free_list( head );
699 return NULL;
700 }
701
702 static list_t *
703 parse_list( char **sp )
704 {
705 return parse_imap_list( 0, sp );
706 }
707
708 static void
709 parse_capability( imap_t *imap, char *cmd )
710 {
711 char *arg;
712 unsigned i;
713
714 imap->caps = 0x80000000;
715 while ((arg = next_arg( &cmd )))
716 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
717 if (!strcmp( cap_list[i], arg ))
718 imap->caps |= 1 << i;
719 imap->rcaps = imap->caps;
720 }
721
722 static int
723 parse_response_code( imap_store_t *ctx, struct imap_cmd_cb *cb, char *s )
724 {
725 imap_t *imap = ctx->imap;
726 char *arg, *p;
727
728 if (*s != '[')
729 return RESP_OK; /* no response code */
730 s++;
731 if (!(p = strchr( s, ']' ))) {
732 fprintf( stderr, "IMAP error: malformed response code\n" );
733 return RESP_BAD;
734 }
735 *p++ = 0;
736 arg = next_arg( &s );
737 if (!strcmp( "UIDVALIDITY", arg )) {
738 if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg ))) {
739 fprintf( stderr, "IMAP error: malformed UIDVALIDITY status\n" );
740 return RESP_BAD;
741 }
742 } else if (!strcmp( "UIDNEXT", arg )) {
743 if (!(arg = next_arg( &s )) || !(imap->uidnext = atoi( arg ))) {
744 fprintf( stderr, "IMAP error: malformed NEXTUID status\n" );
745 return RESP_BAD;
746 }
747 } else if (!strcmp( "CAPABILITY", arg )) {
748 parse_capability( imap, s );
749 } else if (!strcmp( "ALERT", arg )) {
750 /* RFC2060 says that these messages MUST be displayed
751 * to the user
752 */
753 for (; isspace( (unsigned char)*p ); p++);
754 fprintf( stderr, "*** IMAP ALERT *** %s\n", p );
755 } else if (cb && cb->ctx && !strcmp( "APPENDUID", arg )) {
756 if (!(arg = next_arg( &s )) || !(ctx->gen.uidvalidity = atoi( arg )) ||
757 !(arg = next_arg( &s )) || !(*(int *)cb->ctx = atoi( arg )))
758 {
759 fprintf( stderr, "IMAP error: malformed APPENDUID status\n" );
760 return RESP_BAD;
761 }
762 }
763 return RESP_OK;
764 }
765
766 static int
767 get_cmd_result( imap_store_t *ctx, struct imap_cmd *tcmd )
768 {
769 imap_t *imap = ctx->imap;
770 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
771 char *cmd, *arg, *arg1, *p;
772 int n, resp, resp2, tag;
773
774 for (;;) {
775 if (buffer_gets( &imap->buf, &cmd ))
776 return RESP_BAD;
777
778 arg = next_arg( &cmd );
779 if (*arg == '*') {
780 arg = next_arg( &cmd );
781 if (!arg) {
782 fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
783 return RESP_BAD;
784 }
785
786 if (!strcmp( "NAMESPACE", arg )) {
787 imap->ns_personal = parse_list( &cmd );
788 imap->ns_other = parse_list( &cmd );
789 imap->ns_shared = parse_list( &cmd );
790 } else if (!strcmp( "OK", arg ) || !strcmp( "BAD", arg ) ||
791 !strcmp( "NO", arg ) || !strcmp( "BYE", arg )) {
792 if ((resp = parse_response_code( ctx, 0, cmd )) != RESP_OK)
793 return resp;
794 } else if (!strcmp( "CAPABILITY", arg ))
795 parse_capability( imap, cmd );
796 else if ((arg1 = next_arg( &cmd ))) {
797 if (!strcmp( "EXISTS", arg1 ))
798 ctx->gen.count = atoi( arg );
799 else if (!strcmp( "RECENT", arg1 ))
800 ctx->gen.recent = atoi( arg );
801 } else {
802 fprintf( stderr, "IMAP error: unable to parse untagged response\n" );
803 return RESP_BAD;
804 }
805 } else if (!imap->in_progress) {
806 fprintf( stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "" );
807 return RESP_BAD;
808 } else if (*arg == '+') {
809 /* This can happen only with the last command underway, as
810 it enforces a round-trip. */
811 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
812 offsetof(struct imap_cmd, next));
813 if (cmdp->cb.data) {
814 n = socket_write( &imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen );
815 free( cmdp->cb.data );
816 cmdp->cb.data = 0;
817 if (n != (int)cmdp->cb.dlen)
818 return RESP_BAD;
819 } else if (cmdp->cb.cont) {
820 if (cmdp->cb.cont( ctx, cmdp, cmd ))
821 return RESP_BAD;
822 } else {
823 fprintf( stderr, "IMAP error: unexpected command continuation request\n" );
824 return RESP_BAD;
825 }
826 if (socket_write( &imap->buf.sock, "\r\n", 2 ) != 2)
827 return RESP_BAD;
828 if (!cmdp->cb.cont)
829 imap->literal_pending = 0;
830 if (!tcmd)
831 return DRV_OK;
832 } else {
833 tag = atoi( arg );
834 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
835 if (cmdp->tag == tag)
836 goto gottag;
837 fprintf( stderr, "IMAP error: unexpected tag %s\n", arg );
838 return RESP_BAD;
839 gottag:
840 if (!(*pcmdp = cmdp->next))
841 imap->in_progress_append = pcmdp;
842 imap->num_in_progress--;
843 if (cmdp->cb.cont || cmdp->cb.data)
844 imap->literal_pending = 0;
845 arg = next_arg( &cmd );
846 if (!strcmp( "OK", arg ))
847 resp = DRV_OK;
848 else {
849 if (!strcmp( "NO", arg )) {
850 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp( cmd, "[TRYCREATE]", 11 ))) { /* SELECT, APPEND or UID COPY */
851 p = strchr( cmdp->cmd, '"' );
852 if (!issue_imap_cmd( ctx, 0, "CREATE \"%.*s\"", strchr( p + 1, '"' ) - p + 1, p )) {
853 resp = RESP_BAD;
854 goto normal;
855 }
856 /* not waiting here violates the spec, but a server that does not
857 grok this nonetheless violates it too. */
858 cmdp->cb.create = 0;
859 if (!(ncmdp = issue_imap_cmd( ctx, &cmdp->cb, "%s", cmdp->cmd ))) {
860 resp = RESP_BAD;
861 goto normal;
862 }
863 free( cmdp->cmd );
864 free( cmdp );
865 if (!tcmd)
866 return 0; /* ignored */
867 if (cmdp == tcmd)
868 tcmd = ncmdp;
869 continue;
870 }
871 resp = RESP_NO;
872 } else /*if (!strcmp( "BAD", arg ))*/
873 resp = RESP_BAD;
874 fprintf( stderr, "IMAP command '%s' returned response (%s) - %s\n",
875 memcmp (cmdp->cmd, "LOGIN", 5) ?
876 cmdp->cmd : "LOGIN <user> <pass>",
877 arg, cmd ? cmd : "");
878 }
879 if ((resp2 = parse_response_code( ctx, &cmdp->cb, cmd )) > resp)
880 resp = resp2;
881 normal:
882 if (cmdp->cb.done)
883 cmdp->cb.done( ctx, cmdp, resp );
884 if (cmdp->cb.data)
885 free( cmdp->cb.data );
886 free( cmdp->cmd );
887 free( cmdp );
888 if (!tcmd || tcmd == cmdp)
889 return resp;
890 }
891 }
892 /* not reached */
893 }
894
895 static void
896 imap_close_server( imap_store_t *ictx )
897 {
898 imap_t *imap = ictx->imap;
899
900 if (imap->buf.sock.fd != -1) {
901 imap_exec( ictx, 0, "LOGOUT" );
902 close( imap->buf.sock.fd );
903 }
904 free_list( imap->ns_personal );
905 free_list( imap->ns_other );
906 free_list( imap->ns_shared );
907 free( imap );
908 }
909
910 static void
911 imap_close_store( store_t *ctx )
912 {
913 imap_close_server( (imap_store_t *)ctx );
914 free_generic_messages( ctx->msgs );
915 free( ctx );
916 }
917
918 static store_t *
919 imap_open_store( imap_server_conf_t *srvc )
920 {
921 imap_store_t *ctx;
922 imap_t *imap;
923 char *arg, *rsp;
924 struct hostent *he;
925 struct sockaddr_in addr;
926 int s, a[2], preauth;
927
928 ctx = xcalloc( sizeof(*ctx), 1 );
929
930 ctx->imap = imap = xcalloc( sizeof(*imap), 1 );
931 imap->buf.sock.fd = -1;
932 imap->in_progress_append = &imap->in_progress;
933
934 /* open connection to IMAP server */
935
936 if (srvc->tunnel) {
937 info( "Starting tunnel '%s'... ", srvc->tunnel );
938
939 if (socketpair( PF_UNIX, SOCK_STREAM, 0, a )) {
940 perror( "socketpair" );
941 exit( 1 );
942 }
943
944 if (fork() == 0) {
945 if (dup2( a[0], 0 ) == -1 || dup2( a[0], 1 ) == -1)
946 _exit( 127 );
947 close( a[0] );
948 close( a[1] );
949 execl( "/bin/sh", "sh", "-c", srvc->tunnel, NULL );
950 _exit( 127 );
951 }
952
953 close (a[0]);
954
955 imap->buf.sock.fd = a[1];
956
957 info( "ok\n" );
958 } else {
959 memset( &addr, 0, sizeof(addr) );
960 addr.sin_port = htons( srvc->port );
961 addr.sin_family = AF_INET;
962
963 info( "Resolving %s... ", srvc->host );
964 he = gethostbyname( srvc->host );
965 if (!he) {
966 perror( "gethostbyname" );
967 goto bail;
968 }
969 info( "ok\n" );
970
971 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
972
973 s = socket( PF_INET, SOCK_STREAM, 0 );
974
975 info( "Connecting to %s:%hu... ", inet_ntoa( addr.sin_addr ), ntohs( addr.sin_port ) );
976 if (connect( s, (struct sockaddr *)&addr, sizeof(addr) )) {
977 close( s );
978 perror( "connect" );
979 goto bail;
980 }
981 info( "ok\n" );
982
983 imap->buf.sock.fd = s;
984
985 }
986
987 /* read the greeting string */
988 if (buffer_gets( &imap->buf, &rsp )) {
989 fprintf( stderr, "IMAP error: no greeting response\n" );
990 goto bail;
991 }
992 arg = next_arg( &rsp );
993 if (!arg || *arg != '*' || (arg = next_arg( &rsp )) == NULL) {
994 fprintf( stderr, "IMAP error: invalid greeting response\n" );
995 goto bail;
996 }
997 preauth = 0;
998 if (!strcmp( "PREAUTH", arg ))
999 preauth = 1;
1000 else if (strcmp( "OK", arg ) != 0) {
1001 fprintf( stderr, "IMAP error: unknown greeting response\n" );
1002 goto bail;
1003 }
1004 parse_response_code( ctx, 0, rsp );
1005 if (!imap->caps && imap_exec( ctx, 0, "CAPABILITY" ) != RESP_OK)
1006 goto bail;
1007
1008 if (!preauth) {
1009
1010 info ("Logging in...\n");
1011 if (!srvc->user) {
1012 fprintf( stderr, "Skipping server %s, no user\n", srvc->host );
1013 goto bail;
1014 }
1015 if (!srvc->pass) {
1016 char prompt[80];
1017 sprintf( prompt, "Password (%s@%s): ", srvc->user, srvc->host );
1018 arg = getpass( prompt );
1019 if (!arg) {
1020 perror( "getpass" );
1021 exit( 1 );
1022 }
1023 if (!*arg) {
1024 fprintf( stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host );
1025 goto bail;
1026 }
1027 /*
1028 * getpass() returns a pointer to a static buffer. make a copy
1029 * for long term storage.
1030 */
1031 srvc->pass = strdup( arg );
1032 }
1033 if (CAP(NOLOGIN)) {
1034 fprintf( stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host );
1035 goto bail;
1036 }
1037 warn( "*** IMAP Warning *** Password is being sent in the clear\n" );
1038 if (imap_exec( ctx, 0, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass ) != RESP_OK) {
1039 fprintf( stderr, "IMAP error: LOGIN failed\n" );
1040 goto bail;
1041 }
1042 } /* !preauth */
1043
1044 ctx->prefix = "";
1045 ctx->trashnc = 1;
1046 return (store_t *)ctx;
1047
1048 bail:
1049 imap_close_store( &ctx->gen );
1050 return 0;
1051 }
1052
1053 static int
1054 imap_make_flags( int flags, char *buf )
1055 {
1056 const char *s;
1057 unsigned i, d;
1058
1059 for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1060 if (flags & (1 << i)) {
1061 buf[d++] = ' ';
1062 buf[d++] = '\\';
1063 for (s = Flags[i]; *s; s++)
1064 buf[d++] = *s;
1065 }
1066 buf[0] = '(';
1067 buf[d++] = ')';
1068 return d;
1069 }
1070
1071 #define TUIDL 8
1072
1073 static int
1074 imap_store_msg( store_t *gctx, msg_data_t *data, int *uid )
1075 {
1076 imap_store_t *ctx = (imap_store_t *)gctx;
1077 imap_t *imap = ctx->imap;
1078 struct imap_cmd_cb cb;
1079 char *fmap, *buf;
1080 const char *prefix, *box;
1081 int ret, i, j, d, len, extra, nocr;
1082 int start, sbreak = 0, ebreak = 0;
1083 char flagstr[128], tuid[TUIDL * 2 + 1];
1084
1085 memset( &cb, 0, sizeof(cb) );
1086
1087 fmap = data->data;
1088 len = data->len;
1089 nocr = !data->crlf;
1090 extra = 0, i = 0;
1091 if (!CAP(UIDPLUS) && uid) {
1092 nloop:
1093 start = i;
1094 while (i < len)
1095 if (fmap[i++] == '\n') {
1096 extra += nocr;
1097 if (i - 2 + nocr == start) {
1098 sbreak = ebreak = i - 2 + nocr;
1099 goto mktid;
1100 }
1101 if (!memcmp( fmap + start, "X-TUID: ", 8 )) {
1102 extra -= (ebreak = i) - (sbreak = start) + nocr;
1103 goto mktid;
1104 }
1105 goto nloop;
1106 }
1107 /* invalid message */
1108 free( fmap );
1109 return DRV_MSG_BAD;
1110 mktid:
1111 for (j = 0; j < TUIDL; j++)
1112 sprintf( tuid + j * 2, "%02x", arc4_getbyte() );
1113 extra += 8 + TUIDL * 2 + 2;
1114 }
1115 if (nocr)
1116 for (; i < len; i++)
1117 if (fmap[i] == '\n')
1118 extra++;
1119
1120 cb.dlen = len + extra;
1121 buf = cb.data = xmalloc( cb.dlen );
1122 i = 0;
1123 if (!CAP(UIDPLUS) && uid) {
1124 if (nocr) {
1125 for (; i < sbreak; i++)
1126 if (fmap[i] == '\n') {
1127 *buf++ = '\r';
1128 *buf++ = '\n';
1129 } else
1130 *buf++ = fmap[i];
1131 } else {
1132 memcpy( buf, fmap, sbreak );
1133 buf += sbreak;
1134 }
1135 memcpy( buf, "X-TUID: ", 8 );
1136 buf += 8;
1137 memcpy( buf, tuid, TUIDL * 2 );
1138 buf += TUIDL * 2;
1139 *buf++ = '\r';
1140 *buf++ = '\n';
1141 i = ebreak;
1142 }
1143 if (nocr) {
1144 for (; i < len; i++)
1145 if (fmap[i] == '\n') {
1146 *buf++ = '\r';
1147 *buf++ = '\n';
1148 } else
1149 *buf++ = fmap[i];
1150 } else
1151 memcpy( buf, fmap + i, len - i );
1152
1153 free( fmap );
1154
1155 d = 0;
1156 if (data->flags) {
1157 d = imap_make_flags( data->flags, flagstr );
1158 flagstr[d++] = ' ';
1159 }
1160 flagstr[d] = 0;
1161
1162 if (!uid) {
1163 box = gctx->conf->trash;
1164 prefix = ctx->prefix;
1165 cb.create = 1;
1166 if (ctx->trashnc)
1167 imap->caps = imap->rcaps & ~(1 << LITERALPLUS);
1168 } else {
1169 box = gctx->name;
1170 prefix = !strcmp( box, "INBOX" ) ? "" : ctx->prefix;
1171 cb.create = 0;
1172 }
1173 cb.ctx = uid;
1174 ret = imap_exec_m( ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr );
1175 imap->caps = imap->rcaps;
1176 if (ret != DRV_OK)
1177 return ret;
1178 if (!uid)
1179 ctx->trashnc = 0;
1180 else
1181 gctx->count++;
1182
1183 return DRV_OK;
1184 }
1185
1186 #define CHUNKSIZE 0x1000
1187
1188 static int
1189 read_message( FILE *f, msg_data_t *msg )
1190 {
1191 int len, r;
1192
1193 memset( msg, 0, sizeof *msg );
1194 len = CHUNKSIZE;
1195 msg->data = xmalloc( len+1 );
1196 msg->data[0] = 0;
1197
1198 while(!feof( f )) {
1199 if (msg->len >= len) {
1200 void *p;
1201 len += CHUNKSIZE;
1202 p = xrealloc(msg->data, len+1);
1203 if (!p)
1204 break;
1205 }
1206 r = fread( &msg->data[msg->len], 1, len - msg->len, f );
1207 if (r <= 0)
1208 break;
1209 msg->len += r;
1210 }
1211 msg->data[msg->len] = 0;
1212 return msg->len;
1213 }
1214
1215 static int
1216 count_messages( msg_data_t *msg )
1217 {
1218 int count = 0;
1219 char *p = msg->data;
1220
1221 while (1) {
1222 if (!strncmp( "From ", p, 5 )) {
1223 count++;
1224 p += 5;
1225 }
1226 p = strstr( p+5, "\nFrom ");
1227 if (!p)
1228 break;
1229 p++;
1230 }
1231 return count;
1232 }
1233
1234 static int
1235 split_msg( msg_data_t *all_msgs, msg_data_t *msg, int *ofs )
1236 {
1237 char *p, *data;
1238
1239 memset( msg, 0, sizeof *msg );
1240 if (*ofs >= all_msgs->len)
1241 return 0;
1242
1243 data = &all_msgs->data[ *ofs ];
1244 msg->len = all_msgs->len - *ofs;
1245
1246 if (msg->len < 5 || strncmp( data, "From ", 5 ))
1247 return 0;
1248
1249 p = strstr( data, "\nFrom " );
1250 if (p)
1251 msg->len = &p[1] - data;
1252
1253 msg->data = xmalloc( msg->len + 1 );
1254 if (!msg->data)
1255 return 0;
1256
1257 memcpy( msg->data, data, msg->len );
1258 msg->data[ msg->len ] = 0;
1259
1260 *ofs += msg->len;
1261 return 1;
1262 }
1263
1264 static imap_server_conf_t server =
1265 {
1266 NULL, /* name */
1267 NULL, /* tunnel */
1268 NULL, /* host */
1269 0, /* port */
1270 NULL, /* user */
1271 NULL, /* pass */
1272 };
1273
1274 static char *imap_folder;
1275
1276 static int
1277 git_imap_config(const char *key, const char *val)
1278 {
1279 char imap_key[] = "imap.";
1280
1281 if (strncmp( key, imap_key, sizeof imap_key - 1 ))
1282 return 0;
1283 key += sizeof imap_key - 1;
1284
1285 if (!strcmp( "folder", key )) {
1286 imap_folder = strdup( val );
1287 } else if (!strcmp( "host", key )) {
1288 {
1289 if (!strncmp( "imap:", val, 5 ))
1290 val += 5;
1291 if (!server.port)
1292 server.port = 143;
1293 }
1294 if (!strncmp( "//", val, 2 ))
1295 val += 2;
1296 server.host = strdup( val );
1297 }
1298 else if (!strcmp( "user", key ))
1299 server.user = strdup( val );
1300 else if (!strcmp( "pass", key ))
1301 server.pass = strdup( val );
1302 else if (!strcmp( "port", key ))
1303 server.port = git_config_int( key, val );
1304 else if (!strcmp( "tunnel", key ))
1305 server.tunnel = strdup( val );
1306 return 0;
1307 }
1308
1309 int
1310 main(int argc, char **argv)
1311 {
1312 msg_data_t all_msgs, msg;
1313 store_t *ctx = 0;
1314 int uid = 0;
1315 int ofs = 0;
1316 int r;
1317 int total, n = 0;
1318
1319 /* init the random number generator */
1320 arc4_init();
1321
1322 git_config( git_imap_config );
1323
1324 if (!imap_folder) {
1325 fprintf( stderr, "no imap store specified\n" );
1326 return 1;
1327 }
1328
1329 /* read the messages */
1330 if (!read_message( stdin, &all_msgs )) {
1331 fprintf(stderr,"nothing to send\n");
1332 return 1;
1333 }
1334
1335 /* write it to the imap server */
1336 ctx = imap_open_store( &server );
1337 if (!ctx) {
1338 fprintf( stderr,"failed to open store\n");
1339 return 1;
1340 }
1341
1342 total = count_messages( &all_msgs );
1343 fprintf( stderr, "sending %d message%s\n", total, (total!=1)?"s":"" );
1344 ctx->name = imap_folder;
1345 while (1) {
1346 unsigned percent = n * 100 / total;
1347 fprintf( stderr, "%4u%% (%d/%d) done\r", percent, n, total );
1348 if (!split_msg( &all_msgs, &msg, &ofs ))
1349 break;
1350 r = imap_store_msg( ctx, &msg, &uid );
1351 if (r != DRV_OK) break;
1352 n++;
1353 }
1354 fprintf( stderr,"\n" );
1355
1356 imap_close_store( ctx );
1357
1358 return 0;
1359 }
Thomas Rast's git repo