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imap-send: remove useless uid code
[git/dscho.git] / imap-send.c
blob8da7a9493155cc8fbffcaace9c06865b6c9865d8
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 #include "exec_cmd.h"
27 #ifdef NO_OPENSSL
28 typedef void *SSL;
29 #endif
30
31 struct store_conf {
32 char *name;
33 const char *path; /* should this be here? its interpretation is driver-specific */
34 char *map_inbox;
35 char *trash;
36 unsigned max_size; /* off_t is overkill */
37 unsigned trash_remote_new:1, trash_only_new:1;
38 };
39
40 struct string_list {
41 struct string_list *next;
42 char string[1];
43 };
44
45 struct channel_conf {
46 struct channel_conf *next;
47 char *name;
48 struct store_conf *master, *slave;
49 char *master_name, *slave_name;
50 char *sync_state;
51 struct string_list *patterns;
52 int mops, sops;
53 unsigned max_messages; /* for slave only */
54 };
55
56 struct group_conf {
57 struct group_conf *next;
58 char *name;
59 struct string_list *channels;
60 };
61
62 /* For message->status */
63 #define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
64 #define M_DEAD (1<<1) /* expunged */
65 #define M_FLAGS (1<<2) /* flags fetched */
66
67 struct message {
68 struct message *next;
69 /* struct string_list *keywords; */
70 size_t size; /* zero implies "not fetched" */
71 int uid;
72 unsigned char flags, status;
73 };
74
75 struct store {
76 struct store_conf *conf; /* foreign */
77
78 /* currently open mailbox */
79 const char *name; /* foreign! maybe preset? */
80 char *path; /* own */
81 struct message *msgs; /* own */
82 int uidvalidity;
83 unsigned char opts; /* maybe preset? */
84 /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
85 int count; /* # of messages */
86 int recent; /* # of recent messages - don't trust this beyond the initial read */
87 };
88
89 struct msg_data {
90 char *data;
91 int len;
92 unsigned char flags;
93 unsigned int crlf:1;
94 };
95
96 #define DRV_OK 0
97 #define DRV_MSG_BAD -1
98 #define DRV_BOX_BAD -2
99 #define DRV_STORE_BAD -3
100
101 static int Verbose, Quiet;
102
103 static void imap_info(const char *, ...);
104 static void imap_warn(const char *, ...);
105
106 static char *next_arg(char **);
107
108 static void free_generic_messages(struct message *);
109
110 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
111
112 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
113 {
114 int len;
115 char tmp[8192];
116
117 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
118 if (len < 0)
119 die("Fatal: Out of memory");
120 if (len >= sizeof(tmp))
121 die("imap command overflow!");
122 *strp = xmemdupz(tmp, len);
123 return len;
124 }
125
126 struct imap_server_conf {
127 char *name;
128 char *tunnel;
129 char *host;
130 int port;
131 char *user;
132 char *pass;
133 int use_ssl;
134 int ssl_verify;
135 int use_html;
136 };
137
138 struct imap_store_conf {
139 struct store_conf gen;
140 struct imap_server_conf *server;
141 unsigned use_namespace:1;
142 };
143
144 #define NIL (void *)0x1
145 #define LIST (void *)0x2
146
147 struct imap_list {
148 struct imap_list *next, *child;
149 char *val;
150 int len;
151 };
152
153 struct imap_socket {
154 int fd;
155 SSL *ssl;
156 };
157
158 struct imap_buffer {
159 struct imap_socket sock;
160 int bytes;
161 int offset;
162 char buf[1024];
163 };
164
165 struct imap_cmd;
166
167 struct imap {
168 int uidnext; /* from SELECT responses */
169 struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
170 unsigned caps, rcaps; /* CAPABILITY results */
171 /* command queue */
172 int nexttag, num_in_progress, literal_pending;
173 struct imap_cmd *in_progress, **in_progress_append;
174 struct imap_buffer buf; /* this is BIG, so put it last */
175 };
176
177 struct imap_store {
178 struct store gen;
179 int uidvalidity;
180 struct imap *imap;
181 const char *prefix;
182 unsigned /*currentnc:1,*/ trashnc:1;
183 };
184
185 struct imap_cmd_cb {
186 int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
187 void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
188 void *ctx;
189 char *data;
190 int dlen;
191 int uid;
192 unsigned create:1, trycreate:1;
193 };
194
195 struct imap_cmd {
196 struct imap_cmd *next;
197 struct imap_cmd_cb cb;
198 char *cmd;
199 int tag;
200 };
201
202 #define CAP(cap) (imap->caps & (1 << (cap)))
203
204 enum CAPABILITY {
205 NOLOGIN = 0,
206 UIDPLUS,
207 LITERALPLUS,
208 NAMESPACE,
209 STARTTLS,
210 };
211
212 static const char *cap_list[] = {
213 "LOGINDISABLED",
214 "UIDPLUS",
215 "LITERAL+",
216 "NAMESPACE",
217 "STARTTLS",
218 };
219
220 #define RESP_OK 0
221 #define RESP_NO 1
222 #define RESP_BAD 2
223
224 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
225
226
227 static const char *Flags[] = {
228 "Draft",
229 "Flagged",
230 "Answered",
231 "Seen",
232 "Deleted",
233 };
234
235 #ifndef NO_OPENSSL
236 static void ssl_socket_perror(const char *func)
237 {
238 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
239 }
240 #endif
241
242 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
243 {
244 #ifndef NO_OPENSSL
245 if (sock->ssl) {
246 int sslerr = SSL_get_error(sock->ssl, ret);
247 switch (sslerr) {
248 case SSL_ERROR_NONE:
249 break;
250 case SSL_ERROR_SYSCALL:
251 perror("SSL_connect");
252 break;
253 default:
254 ssl_socket_perror("SSL_connect");
255 break;
256 }
257 } else
258 #endif
259 {
260 if (ret < 0)
261 perror(func);
262 else
263 fprintf(stderr, "%s: unexpected EOF\n", func);
264 }
265 }
266
267 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
268 {
269 #ifdef NO_OPENSSL
270 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
271 return -1;
272 #else
273 SSL_METHOD *meth;
274 SSL_CTX *ctx;
275 int ret;
276
277 SSL_library_init();
278 SSL_load_error_strings();
279
280 if (use_tls_only)
281 meth = TLSv1_method();
282 else
283 meth = SSLv23_method();
284
285 if (!meth) {
286 ssl_socket_perror("SSLv23_method");
287 return -1;
288 }
289
290 ctx = SSL_CTX_new(meth);
291
292 if (verify)
293 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
294
295 if (!SSL_CTX_set_default_verify_paths(ctx)) {
296 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
297 return -1;
298 }
299 sock->ssl = SSL_new(ctx);
300 if (!sock->ssl) {
301 ssl_socket_perror("SSL_new");
302 return -1;
303 }
304 if (!SSL_set_fd(sock->ssl, sock->fd)) {
305 ssl_socket_perror("SSL_set_fd");
306 return -1;
307 }
308
309 ret = SSL_connect(sock->ssl);
310 if (ret <= 0) {
311 socket_perror("SSL_connect", sock, ret);
312 return -1;
313 }
314
315 return 0;
316 #endif
317 }
318
319 static int socket_read(struct imap_socket *sock, char *buf, int len)
320 {
321 ssize_t n;
322 #ifndef NO_OPENSSL
323 if (sock->ssl)
324 n = SSL_read(sock->ssl, buf, len);
325 else
326 #endif
327 n = xread(sock->fd, buf, len);
328 if (n <= 0) {
329 socket_perror("read", sock, n);
330 close(sock->fd);
331 sock->fd = -1;
332 }
333 return n;
334 }
335
336 static int socket_write(struct imap_socket *sock, const char *buf, int len)
337 {
338 int n;
339 #ifndef NO_OPENSSL
340 if (sock->ssl)
341 n = SSL_write(sock->ssl, buf, len);
342 else
343 #endif
344 n = write_in_full(sock->fd, buf, len);
345 if (n != len) {
346 socket_perror("write", sock, n);
347 close(sock->fd);
348 sock->fd = -1;
349 }
350 return n;
351 }
352
353 static void socket_shutdown(struct imap_socket *sock)
354 {
355 #ifndef NO_OPENSSL
356 if (sock->ssl) {
357 SSL_shutdown(sock->ssl);
358 SSL_free(sock->ssl);
359 }
360 #endif
361 close(sock->fd);
362 }
363
364 /* simple line buffering */
365 static int buffer_gets(struct imap_buffer *b, char **s)
366 {
367 int n;
368 int start = b->offset;
369
370 *s = b->buf + start;
371
372 for (;;) {
373 /* make sure we have enough data to read the \r\n sequence */
374 if (b->offset + 1 >= b->bytes) {
375 if (start) {
376 /* shift down used bytes */
377 *s = b->buf;
378
379 assert(start <= b->bytes);
380 n = b->bytes - start;
381
382 if (n)
383 memmove(b->buf, b->buf + start, n);
384 b->offset -= start;
385 b->bytes = n;
386 start = 0;
387 }
388
389 n = socket_read(&b->sock, b->buf + b->bytes,
390 sizeof(b->buf) - b->bytes);
391
392 if (n <= 0)
393 return -1;
394
395 b->bytes += n;
396 }
397
398 if (b->buf[b->offset] == '\r') {
399 assert(b->offset + 1 < b->bytes);
400 if (b->buf[b->offset + 1] == '\n') {
401 b->buf[b->offset] = 0; /* terminate the string */
402 b->offset += 2; /* next line */
403 if (Verbose)
404 puts(*s);
405 return 0;
406 }
407 }
408
409 b->offset++;
410 }
411 /* not reached */
412 }
413
414 static void imap_info(const char *msg, ...)
415 {
416 va_list va;
417
418 if (!Quiet) {
419 va_start(va, msg);
420 vprintf(msg, va);
421 va_end(va);
422 fflush(stdout);
423 }
424 }
425
426 static void imap_warn(const char *msg, ...)
427 {
428 va_list va;
429
430 if (Quiet < 2) {
431 va_start(va, msg);
432 vfprintf(stderr, msg, va);
433 va_end(va);
434 }
435 }
436
437 static char *next_arg(char **s)
438 {
439 char *ret;
440
441 if (!s || !*s)
442 return NULL;
443 while (isspace((unsigned char) **s))
444 (*s)++;
445 if (!**s) {
446 *s = NULL;
447 return NULL;
448 }
449 if (**s == '"') {
450 ++*s;
451 ret = *s;
452 *s = strchr(*s, '"');
453 } else {
454 ret = *s;
455 while (**s && !isspace((unsigned char) **s))
456 (*s)++;
457 }
458 if (*s) {
459 if (**s)
460 *(*s)++ = 0;
461 if (!**s)
462 *s = NULL;
463 }
464 return ret;
465 }
466
467 static void free_generic_messages(struct message *msgs)
468 {
469 struct message *tmsg;
470
471 for (; msgs; msgs = tmsg) {
472 tmsg = msgs->next;
473 free(msgs);
474 }
475 }
476
477 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
478 {
479 int ret;
480 va_list va;
481
482 va_start(va, fmt);
483 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
484 die("Fatal: buffer too small. Please report a bug.");
485 va_end(va);
486 return ret;
487 }
488
489 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
490 struct imap_cmd_cb *cb,
491 const char *fmt, va_list ap)
492 {
493 struct imap *imap = ctx->imap;
494 struct imap_cmd *cmd;
495 int n, bufl;
496 char buf[1024];
497
498 cmd = xmalloc(sizeof(struct imap_cmd));
499 nfvasprintf(&cmd->cmd, fmt, ap);
500 cmd->tag = ++imap->nexttag;
501
502 if (cb)
503 cmd->cb = *cb;
504 else
505 memset(&cmd->cb, 0, sizeof(cmd->cb));
506
507 while (imap->literal_pending)
508 get_cmd_result(ctx, NULL);
509
510 bufl = nfsnprintf(buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
511 "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
512 cmd->tag, cmd->cmd, cmd->cb.dlen);
513 if (Verbose) {
514 if (imap->num_in_progress)
515 printf("(%d in progress) ", imap->num_in_progress);
516 if (memcmp(cmd->cmd, "LOGIN", 5))
517 printf(">>> %s", buf);
518 else
519 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
520 }
521 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
522 free(cmd->cmd);
523 free(cmd);
524 if (cb)
525 free(cb->data);
526 return NULL;
527 }
528 if (cmd->cb.data) {
529 if (CAP(LITERALPLUS)) {
530 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
531 free(cmd->cb.data);
532 if (n != cmd->cb.dlen ||
533 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
534 free(cmd->cmd);
535 free(cmd);
536 return NULL;
537 }
538 cmd->cb.data = NULL;
539 } else
540 imap->literal_pending = 1;
541 } else if (cmd->cb.cont)
542 imap->literal_pending = 1;
543 cmd->next = NULL;
544 *imap->in_progress_append = cmd;
545 imap->in_progress_append = &cmd->next;
546 imap->num_in_progress++;
547 return cmd;
548 }
549
550 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
551 struct imap_cmd_cb *cb,
552 const char *fmt, ...)
553 {
554 struct imap_cmd *ret;
555 va_list ap;
556
557 va_start(ap, fmt);
558 ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
559 va_end(ap);
560 return ret;
561 }
562
563 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
564 const char *fmt, ...)
565 {
566 va_list ap;
567 struct imap_cmd *cmdp;
568
569 va_start(ap, fmt);
570 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
571 va_end(ap);
572 if (!cmdp)
573 return RESP_BAD;
574
575 return get_cmd_result(ctx, cmdp);
576 }
577
578 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
579 const char *fmt, ...)
580 {
581 va_list ap;
582 struct imap_cmd *cmdp;
583
584 va_start(ap, fmt);
585 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
586 va_end(ap);
587 if (!cmdp)
588 return DRV_STORE_BAD;
589
590 switch (get_cmd_result(ctx, cmdp)) {
591 case RESP_BAD: return DRV_STORE_BAD;
592 case RESP_NO: return DRV_MSG_BAD;
593 default: return DRV_OK;
594 }
595 }
596
597 static int is_atom(struct imap_list *list)
598 {
599 return list && list->val && list->val != NIL && list->val != LIST;
600 }
601
602 static int is_list(struct imap_list *list)
603 {
604 return list && list->val == LIST;
605 }
606
607 static void free_list(struct imap_list *list)
608 {
609 struct imap_list *tmp;
610
611 for (; list; list = tmp) {
612 tmp = list->next;
613 if (is_list(list))
614 free_list(list->child);
615 else if (is_atom(list))
616 free(list->val);
617 free(list);
618 }
619 }
620
621 static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
622 {
623 struct imap_list *cur;
624 char *s = *sp, *p;
625 int n, bytes;
626
627 for (;;) {
628 while (isspace((unsigned char)*s))
629 s++;
630 if (level && *s == ')') {
631 s++;
632 break;
633 }
634 *curp = cur = xmalloc(sizeof(*cur));
635 curp = &cur->next;
636 cur->val = NULL; /* for clean bail */
637 if (*s == '(') {
638 /* sublist */
639 s++;
640 cur->val = LIST;
641 if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
642 goto bail;
643 } else if (imap && *s == '{') {
644 /* literal */
645 bytes = cur->len = strtol(s + 1, &s, 10);
646 if (*s != '}')
647 goto bail;
648
649 s = cur->val = xmalloc(cur->len);
650
651 /* dump whats left over in the input buffer */
652 n = imap->buf.bytes - imap->buf.offset;
653
654 if (n > bytes)
655 /* the entire message fit in the buffer */
656 n = bytes;
657
658 memcpy(s, imap->buf.buf + imap->buf.offset, n);
659 s += n;
660 bytes -= n;
661
662 /* mark that we used part of the buffer */
663 imap->buf.offset += n;
664
665 /* now read the rest of the message */
666 while (bytes > 0) {
667 if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
668 goto bail;
669 s += n;
670 bytes -= n;
671 }
672
673 if (buffer_gets(&imap->buf, &s))
674 goto bail;
675 } else if (*s == '"') {
676 /* quoted string */
677 s++;
678 p = s;
679 for (; *s != '"'; s++)
680 if (!*s)
681 goto bail;
682 cur->len = s - p;
683 s++;
684 cur->val = xmemdupz(p, cur->len);
685 } else {
686 /* atom */
687 p = s;
688 for (; *s && !isspace((unsigned char)*s); s++)
689 if (level && *s == ')')
690 break;
691 cur->len = s - p;
692 if (cur->len == 3 && !memcmp("NIL", p, 3))
693 cur->val = NIL;
694 else
695 cur->val = xmemdupz(p, cur->len);
696 }
697
698 if (!level)
699 break;
700 if (!*s)
701 goto bail;
702 }
703 *sp = s;
704 *curp = NULL;
705 return 0;
706
707 bail:
708 *curp = NULL;
709 return -1;
710 }
711
712 static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
713 {
714 struct imap_list *head;
715
716 if (!parse_imap_list_l(imap, sp, &head, 0))
717 return head;
718 free_list(head);
719 return NULL;
720 }
721
722 static struct imap_list *parse_list(char **sp)
723 {
724 return parse_imap_list(NULL, sp);
725 }
726
727 static void parse_capability(struct imap *imap, char *cmd)
728 {
729 char *arg;
730 unsigned i;
731
732 imap->caps = 0x80000000;
733 while ((arg = next_arg(&cmd)))
734 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
735 if (!strcmp(cap_list[i], arg))
736 imap->caps |= 1 << i;
737 imap->rcaps = imap->caps;
738 }
739
740 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
741 char *s)
742 {
743 struct imap *imap = ctx->imap;
744 char *arg, *p;
745
746 if (*s != '[')
747 return RESP_OK; /* no response code */
748 s++;
749 if (!(p = strchr(s, ']'))) {
750 fprintf(stderr, "IMAP error: malformed response code\n");
751 return RESP_BAD;
752 }
753 *p++ = 0;
754 arg = next_arg(&s);
755 if (!strcmp("UIDVALIDITY", arg)) {
756 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
757 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
758 return RESP_BAD;
759 }
760 } else if (!strcmp("UIDNEXT", arg)) {
761 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
762 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
763 return RESP_BAD;
764 }
765 } else if (!strcmp("CAPABILITY", arg)) {
766 parse_capability(imap, s);
767 } else if (!strcmp("ALERT", arg)) {
768 /* RFC2060 says that these messages MUST be displayed
769 * to the user
770 */
771 for (; isspace((unsigned char)*p); p++);
772 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
773 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
774 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
775 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
776 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
777 return RESP_BAD;
778 }
779 }
780 return RESP_OK;
781 }
782
783 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
784 {
785 struct imap *imap = ctx->imap;
786 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
787 char *cmd, *arg, *arg1, *p;
788 int n, resp, resp2, tag;
789
790 for (;;) {
791 if (buffer_gets(&imap->buf, &cmd))
792 return RESP_BAD;
793
794 arg = next_arg(&cmd);
795 if (*arg == '*') {
796 arg = next_arg(&cmd);
797 if (!arg) {
798 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
799 return RESP_BAD;
800 }
801
802 if (!strcmp("NAMESPACE", arg)) {
803 imap->ns_personal = parse_list(&cmd);
804 imap->ns_other = parse_list(&cmd);
805 imap->ns_shared = parse_list(&cmd);
806 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
807 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
808 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
809 return resp;
810 } else if (!strcmp("CAPABILITY", arg))
811 parse_capability(imap, cmd);
812 else if ((arg1 = next_arg(&cmd))) {
813 if (!strcmp("EXISTS", arg1))
814 ctx->gen.count = atoi(arg);
815 else if (!strcmp("RECENT", arg1))
816 ctx->gen.recent = atoi(arg);
817 } else {
818 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
819 return RESP_BAD;
820 }
821 } else if (!imap->in_progress) {
822 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
823 return RESP_BAD;
824 } else if (*arg == '+') {
825 /* This can happen only with the last command underway, as
826 it enforces a round-trip. */
827 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
828 offsetof(struct imap_cmd, next));
829 if (cmdp->cb.data) {
830 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
831 free(cmdp->cb.data);
832 cmdp->cb.data = NULL;
833 if (n != (int)cmdp->cb.dlen)
834 return RESP_BAD;
835 } else if (cmdp->cb.cont) {
836 if (cmdp->cb.cont(ctx, cmdp, cmd))
837 return RESP_BAD;
838 } else {
839 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
840 return RESP_BAD;
841 }
842 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
843 return RESP_BAD;
844 if (!cmdp->cb.cont)
845 imap->literal_pending = 0;
846 if (!tcmd)
847 return DRV_OK;
848 } else {
849 tag = atoi(arg);
850 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
851 if (cmdp->tag == tag)
852 goto gottag;
853 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
854 return RESP_BAD;
855 gottag:
856 if (!(*pcmdp = cmdp->next))
857 imap->in_progress_append = pcmdp;
858 imap->num_in_progress--;
859 if (cmdp->cb.cont || cmdp->cb.data)
860 imap->literal_pending = 0;
861 arg = next_arg(&cmd);
862 if (!strcmp("OK", arg))
863 resp = DRV_OK;
864 else {
865 if (!strcmp("NO", arg)) {
866 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
867 p = strchr(cmdp->cmd, '"');
868 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", strchr(p + 1, '"') - p + 1, p)) {
869 resp = RESP_BAD;
870 goto normal;
871 }
872 /* not waiting here violates the spec, but a server that does not
873 grok this nonetheless violates it too. */
874 cmdp->cb.create = 0;
875 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
876 resp = RESP_BAD;
877 goto normal;
878 }
879 free(cmdp->cmd);
880 free(cmdp);
881 if (!tcmd)
882 return 0; /* ignored */
883 if (cmdp == tcmd)
884 tcmd = ncmdp;
885 continue;
886 }
887 resp = RESP_NO;
888 } else /*if (!strcmp("BAD", arg))*/
889 resp = RESP_BAD;
890 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
891 memcmp(cmdp->cmd, "LOGIN", 5) ?
892 cmdp->cmd : "LOGIN <user> <pass>",
893 arg, cmd ? cmd : "");
894 }
895 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
896 resp = resp2;
897 normal:
898 if (cmdp->cb.done)
899 cmdp->cb.done(ctx, cmdp, resp);
900 free(cmdp->cb.data);
901 free(cmdp->cmd);
902 free(cmdp);
903 if (!tcmd || tcmd == cmdp)
904 return resp;
905 }
906 }
907 /* not reached */
908 }
909
910 static void imap_close_server(struct imap_store *ictx)
911 {
912 struct imap *imap = ictx->imap;
913
914 if (imap->buf.sock.fd != -1) {
915 imap_exec(ictx, NULL, "LOGOUT");
916 socket_shutdown(&imap->buf.sock);
917 }
918 free_list(imap->ns_personal);
919 free_list(imap->ns_other);
920 free_list(imap->ns_shared);
921 free(imap);
922 }
923
924 static void imap_close_store(struct store *ctx)
925 {
926 imap_close_server((struct imap_store *)ctx);
927 free_generic_messages(ctx->msgs);
928 free(ctx);
929 }
930
931 static struct store *imap_open_store(struct imap_server_conf *srvc)
932 {
933 struct imap_store *ctx;
934 struct imap *imap;
935 char *arg, *rsp;
936 int s = -1, a[2], preauth;
937 pid_t pid;
938
939 ctx = xcalloc(sizeof(*ctx), 1);
940
941 ctx->imap = imap = xcalloc(sizeof(*imap), 1);
942 imap->buf.sock.fd = -1;
943 imap->in_progress_append = &imap->in_progress;
944
945 /* open connection to IMAP server */
946
947 if (srvc->tunnel) {
948 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
949
950 if (socketpair(PF_UNIX, SOCK_STREAM, 0, a)) {
951 perror("socketpair");
952 exit(1);
953 }
954
955 pid = fork();
956 if (pid < 0)
957 _exit(127);
958 if (!pid) {
959 if (dup2(a[0], 0) == -1 || dup2(a[0], 1) == -1)
960 _exit(127);
961 close(a[0]);
962 close(a[1]);
963 execl("/bin/sh", "sh", "-c", srvc->tunnel, NULL);
964 _exit(127);
965 }
966
967 close(a[0]);
968
969 imap->buf.sock.fd = a[1];
970
971 imap_info("ok\n");
972 } else {
973 #ifndef NO_IPV6
974 struct addrinfo hints, *ai0, *ai;
975 int gai;
976 char portstr[6];
977
978 snprintf(portstr, sizeof(portstr), "%hu", srvc->port);
979
980 memset(&hints, 0, sizeof(hints));
981 hints.ai_socktype = SOCK_STREAM;
982 hints.ai_protocol = IPPROTO_TCP;
983
984 imap_info("Resolving %s... ", srvc->host);
985 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
986 if (gai) {
987 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
988 goto bail;
989 }
990 imap_info("ok\n");
991
992 for (ai0 = ai; ai; ai = ai->ai_next) {
993 char addr[NI_MAXHOST];
994
995 s = socket(ai->ai_family, ai->ai_socktype,
996 ai->ai_protocol);
997 if (s < 0)
998 continue;
999
1000 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1001 sizeof(addr), NULL, 0, NI_NUMERICHOST);
1002 imap_info("Connecting to [%s]:%s... ", addr, portstr);
1003
1004 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1005 close(s);
1006 s = -1;
1007 perror("connect");
1008 continue;
1009 }
1010
1011 break;
1012 }
1013 freeaddrinfo(ai0);
1014 #else /* NO_IPV6 */
1015 struct hostent *he;
1016 struct sockaddr_in addr;
1017
1018 memset(&addr, 0, sizeof(addr));
1019 addr.sin_port = htons(srvc->port);
1020 addr.sin_family = AF_INET;
1021
1022 imap_info("Resolving %s... ", srvc->host);
1023 he = gethostbyname(srvc->host);
1024 if (!he) {
1025 perror("gethostbyname");
1026 goto bail;
1027 }
1028 imap_info("ok\n");
1029
1030 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1031
1032 s = socket(PF_INET, SOCK_STREAM, 0);
1033
1034 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1035 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1036 close(s);
1037 s = -1;
1038 perror("connect");
1039 }
1040 #endif
1041 if (s < 0) {
1042 fputs("Error: unable to connect to server.\n", stderr);
1043 goto bail;
1044 }
1045
1046 imap->buf.sock.fd = s;
1047
1048 if (srvc->use_ssl &&
1049 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1050 close(s);
1051 goto bail;
1052 }
1053 imap_info("ok\n");
1054 }
1055
1056 /* read the greeting string */
1057 if (buffer_gets(&imap->buf, &rsp)) {
1058 fprintf(stderr, "IMAP error: no greeting response\n");
1059 goto bail;
1060 }
1061 arg = next_arg(&rsp);
1062 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1063 fprintf(stderr, "IMAP error: invalid greeting response\n");
1064 goto bail;
1065 }
1066 preauth = 0;
1067 if (!strcmp("PREAUTH", arg))
1068 preauth = 1;
1069 else if (strcmp("OK", arg) != 0) {
1070 fprintf(stderr, "IMAP error: unknown greeting response\n");
1071 goto bail;
1072 }
1073 parse_response_code(ctx, NULL, rsp);
1074 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1075 goto bail;
1076
1077 if (!preauth) {
1078 #ifndef NO_OPENSSL
1079 if (!srvc->use_ssl && CAP(STARTTLS)) {
1080 if (imap_exec(ctx, 0, "STARTTLS") != RESP_OK)
1081 goto bail;
1082 if (ssl_socket_connect(&imap->buf.sock, 1,
1083 srvc->ssl_verify))
1084 goto bail;
1085 /* capabilities may have changed, so get the new capabilities */
1086 if (imap_exec(ctx, 0, "CAPABILITY") != RESP_OK)
1087 goto bail;
1088 }
1089 #endif
1090 imap_info("Logging in...\n");
1091 if (!srvc->user) {
1092 fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1093 goto bail;
1094 }
1095 if (!srvc->pass) {
1096 char prompt[80];
1097 sprintf(prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1098 arg = getpass(prompt);
1099 if (!arg) {
1100 perror("getpass");
1101 exit(1);
1102 }
1103 if (!*arg) {
1104 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1105 goto bail;
1106 }
1107 /*
1108 * getpass() returns a pointer to a static buffer. make a copy
1109 * for long term storage.
1110 */
1111 srvc->pass = xstrdup(arg);
1112 }
1113 if (CAP(NOLOGIN)) {
1114 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1115 goto bail;
1116 }
1117 if (!imap->buf.sock.ssl)
1118 imap_warn("*** IMAP Warning *** Password is being "
1119 "sent in the clear\n");
1120 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1121 fprintf(stderr, "IMAP error: LOGIN failed\n");
1122 goto bail;
1123 }
1124 } /* !preauth */
1125
1126 ctx->prefix = "";
1127 ctx->trashnc = 1;
1128 return (struct store *)ctx;
1129
1130 bail:
1131 imap_close_store(&ctx->gen);
1132 return NULL;
1133 }
1134
1135 static int imap_make_flags(int flags, char *buf)
1136 {
1137 const char *s;
1138 unsigned i, d;
1139
1140 for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1141 if (flags & (1 << i)) {
1142 buf[d++] = ' ';
1143 buf[d++] = '\\';
1144 for (s = Flags[i]; *s; s++)
1145 buf[d++] = *s;
1146 }
1147 buf[0] = '(';
1148 buf[d++] = ')';
1149 return d;
1150 }
1151
1152 static int imap_store_msg(struct store *gctx, struct msg_data *data)
1153 {
1154 struct imap_store *ctx = (struct imap_store *)gctx;
1155 struct imap *imap = ctx->imap;
1156 struct imap_cmd_cb cb;
1157 const char *prefix, *box;
1158 int ret, d;
1159 char flagstr[128];
1160
1161 memset(&cb, 0, sizeof(cb));
1162
1163 cb.dlen = data->len;
1164 cb.data = xmalloc(cb.dlen);
1165 memcpy(cb.data, data->data, data->len);
1166
1167 d = 0;
1168 if (data->flags) {
1169 d = imap_make_flags(data->flags, flagstr);
1170 flagstr[d++] = ' ';
1171 }
1172 flagstr[d] = 0;
1173
1174 box = gctx->name;
1175 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1176 cb.create = 0;
1177 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1178 imap->caps = imap->rcaps;
1179 if (ret != DRV_OK)
1180 return ret;
1181 gctx->count++;
1182
1183 return DRV_OK;
1184 }
1185
1186 static void encode_html_chars(struct strbuf *p)
1187 {
1188 int i;
1189 for (i = 0; i < p->len; i++) {
1190 if (p->buf[i] == '&')
1191 strbuf_splice(p, i, 1, "&amp;", 5);
1192 if (p->buf[i] == '<')
1193 strbuf_splice(p, i, 1, "&lt;", 4);
1194 if (p->buf[i] == '>')
1195 strbuf_splice(p, i, 1, "&gt;", 4);
1196 if (p->buf[i] == '"')
1197 strbuf_splice(p, i, 1, "&quot;", 6);
1198 }
1199 }
1200 static void wrap_in_html(struct msg_data *msg)
1201 {
1202 struct strbuf buf = STRBUF_INIT;
1203 struct strbuf **lines;
1204 struct strbuf **p;
1205 static char *content_type = "Content-Type: text/html;\n";
1206 static char *pre_open = "<pre>\n";
1207 static char *pre_close = "</pre>\n";
1208 int added_header = 0;
1209
1210 strbuf_attach(&buf, msg->data, msg->len, msg->len);
1211 lines = strbuf_split(&buf, '\n');
1212 strbuf_release(&buf);
1213 for (p = lines; *p; p++) {
1214 if (! added_header) {
1215 if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1216 strbuf_addstr(&buf, content_type);
1217 strbuf_addbuf(&buf, *p);
1218 strbuf_addstr(&buf, pre_open);
1219 added_header = 1;
1220 continue;
1221 }
1222 }
1223 else
1224 encode_html_chars(*p);
1225 strbuf_addbuf(&buf, *p);
1226 }
1227 strbuf_addstr(&buf, pre_close);
1228 strbuf_list_free(lines);
1229 msg->len = buf.len;
1230 msg->data = strbuf_detach(&buf, NULL);
1231 }
1232
1233 #define CHUNKSIZE 0x1000
1234
1235 static int read_message(FILE *f, struct msg_data *msg)
1236 {
1237 struct strbuf buf = STRBUF_INIT;
1238
1239 memset(msg, 0, sizeof(*msg));
1240
1241 do {
1242 if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1243 break;
1244 } while (!feof(f));
1245
1246 msg->len = buf.len;
1247 msg->data = strbuf_detach(&buf, NULL);
1248 return msg->len;
1249 }
1250
1251 static int count_messages(struct msg_data *msg)
1252 {
1253 int count = 0;
1254 char *p = msg->data;
1255
1256 while (1) {
1257 if (!prefixcmp(p, "From ")) {
1258 count++;
1259 p += 5;
1260 }
1261 p = strstr(p+5, "\nFrom ");
1262 if (!p)
1263 break;
1264 p++;
1265 }
1266 return count;
1267 }
1268
1269 static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1270 {
1271 char *p, *data;
1272
1273 memset(msg, 0, sizeof *msg);
1274 if (*ofs >= all_msgs->len)
1275 return 0;
1276
1277 data = &all_msgs->data[*ofs];
1278 msg->len = all_msgs->len - *ofs;
1279
1280 if (msg->len < 5 || prefixcmp(data, "From "))
1281 return 0;
1282
1283 p = strchr(data, '\n');
1284 if (p) {
1285 p = &p[1];
1286 msg->len -= p-data;
1287 *ofs += p-data;
1288 data = p;
1289 }
1290
1291 p = strstr(data, "\nFrom ");
1292 if (p)
1293 msg->len = &p[1] - data;
1294
1295 msg->data = xmemdupz(data, msg->len);
1296 *ofs += msg->len;
1297 return 1;
1298 }
1299
1300 static struct imap_server_conf server = {
1301 NULL, /* name */
1302 NULL, /* tunnel */
1303 NULL, /* host */
1304 0, /* port */
1305 NULL, /* user */
1306 NULL, /* pass */
1307 0, /* use_ssl */
1308 1, /* ssl_verify */
1309 0, /* use_html */
1310 };
1311
1312 static char *imap_folder;
1313
1314 static int git_imap_config(const char *key, const char *val, void *cb)
1315 {
1316 char imap_key[] = "imap.";
1317
1318 if (strncmp(key, imap_key, sizeof imap_key - 1))
1319 return 0;
1320
1321 if (!val)
1322 return config_error_nonbool(key);
1323
1324 key += sizeof imap_key - 1;
1325
1326 if (!strcmp("folder", key)) {
1327 imap_folder = xstrdup(val);
1328 } else if (!strcmp("host", key)) {
1329 if (!prefixcmp(val, "imap:"))
1330 val += 5;
1331 else if (!prefixcmp(val, "imaps:")) {
1332 val += 6;
1333 server.use_ssl = 1;
1334 }
1335 if (!prefixcmp(val, "//"))
1336 val += 2;
1337 server.host = xstrdup(val);
1338 } else if (!strcmp("user", key))
1339 server.user = xstrdup(val);
1340 else if (!strcmp("pass", key))
1341 server.pass = xstrdup(val);
1342 else if (!strcmp("port", key))
1343 server.port = git_config_int(key, val);
1344 else if (!strcmp("tunnel", key))
1345 server.tunnel = xstrdup(val);
1346 else if (!strcmp("sslverify", key))
1347 server.ssl_verify = git_config_bool(key, val);
1348 else if (!strcmp("preformattedHTML", key))
1349 server.use_html = git_config_bool(key, val);
1350 return 0;
1351 }
1352
1353 int main(int argc, char **argv)
1354 {
1355 struct msg_data all_msgs, msg;
1356 struct store *ctx = NULL;
1357 int ofs = 0;
1358 int r;
1359 int total, n = 0;
1360 int nongit_ok;
1361
1362 git_extract_argv0_path(argv[0]);
1363
1364 setup_git_directory_gently(&nongit_ok);
1365 git_config(git_imap_config, NULL);
1366
1367 if (!server.port)
1368 server.port = server.use_ssl ? 993 : 143;
1369
1370 if (!imap_folder) {
1371 fprintf(stderr, "no imap store specified\n");
1372 return 1;
1373 }
1374 if (!server.host) {
1375 if (!server.tunnel) {
1376 fprintf(stderr, "no imap host specified\n");
1377 return 1;
1378 }
1379 server.host = "tunnel";
1380 }
1381
1382 /* read the messages */
1383 if (!read_message(stdin, &all_msgs)) {
1384 fprintf(stderr, "nothing to send\n");
1385 return 1;
1386 }
1387
1388 total = count_messages(&all_msgs);
1389 if (!total) {
1390 fprintf(stderr, "no messages to send\n");
1391 return 1;
1392 }
1393
1394 /* write it to the imap server */
1395 ctx = imap_open_store(&server);
1396 if (!ctx) {
1397 fprintf(stderr, "failed to open store\n");
1398 return 1;
1399 }
1400
1401 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1402 ctx->name = imap_folder;
1403 while (1) {
1404 unsigned percent = n * 100 / total;
1405 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1406 if (!split_msg(&all_msgs, &msg, &ofs))
1407 break;
1408 if (server.use_html)
1409 wrap_in_html(&msg);
1410 r = imap_store_msg(ctx, &msg);
1411 if (r != DRV_OK)
1412 break;
1413 n++;
1414 }
1415 fprintf(stderr, "\n");
1416
1417 imap_close_store(ctx);
1418
1419 return 0;
1420 }
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