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Merge branch 'np/maint-sideband-favor-status'
[git/gitbuild.git] / imap-send.c
blob6c9938a0757a3c3b440c227951462f6972923afe
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 #include "run-command.h"
28 #ifdef NO_OPENSSL
29 typedef void *SSL;
30 #endif
31
32 struct store_conf {
33 char *name;
34 const char *path; /* should this be here? its interpretation is driver-specific */
35 char *map_inbox;
36 char *trash;
37 unsigned max_size; /* off_t is overkill */
38 unsigned trash_remote_new:1, trash_only_new:1;
39 };
40
41 struct string_list {
42 struct string_list *next;
43 char string[1];
44 };
45
46 struct channel_conf {
47 struct channel_conf *next;
48 char *name;
49 struct store_conf *master, *slave;
50 char *master_name, *slave_name;
51 char *sync_state;
52 struct string_list *patterns;
53 int mops, sops;
54 unsigned max_messages; /* for slave only */
55 };
56
57 struct group_conf {
58 struct group_conf *next;
59 char *name;
60 struct string_list *channels;
61 };
62
63 /* For message->status */
64 #define M_RECENT (1<<0) /* unsyncable flag; maildir_* depend on this being 1<<0 */
65 #define M_DEAD (1<<1) /* expunged */
66 #define M_FLAGS (1<<2) /* flags fetched */
67
68 struct message {
69 struct message *next;
70 /* struct string_list *keywords; */
71 size_t size; /* zero implies "not fetched" */
72 int uid;
73 unsigned char flags, status;
74 };
75
76 struct store {
77 struct store_conf *conf; /* foreign */
78
79 /* currently open mailbox */
80 const char *name; /* foreign! maybe preset? */
81 char *path; /* own */
82 struct message *msgs; /* own */
83 int uidvalidity;
84 unsigned char opts; /* maybe preset? */
85 /* note that the following do _not_ reflect stats from msgs, but mailbox totals */
86 int count; /* # of messages */
87 int recent; /* # of recent messages - don't trust this beyond the initial read */
88 };
89
90 struct msg_data {
91 char *data;
92 int len;
93 unsigned char flags;
94 unsigned int crlf:1;
95 };
96
97 #undef DRV_OK
98 #define DRV_OK 0
99 #define DRV_MSG_BAD -1
100 #define DRV_BOX_BAD -2
101 #define DRV_STORE_BAD -3
102
103 static int Verbose, Quiet;
104
105 static void imap_info(const char *, ...);
106 static void imap_warn(const char *, ...);
107
108 static char *next_arg(char **);
109
110 static void free_generic_messages(struct message *);
111
112 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
113
114 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
115 {
116 int len;
117 char tmp[8192];
118
119 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
120 if (len < 0)
121 die("Fatal: Out of memory");
122 if (len >= sizeof(tmp))
123 die("imap command overflow!");
124 *strp = xmemdupz(tmp, len);
125 return len;
126 }
127
128 struct imap_server_conf {
129 char *name;
130 char *tunnel;
131 char *host;
132 int port;
133 char *user;
134 char *pass;
135 int use_ssl;
136 int ssl_verify;
137 int use_html;
138 };
139
140 struct imap_store_conf {
141 struct store_conf gen;
142 struct imap_server_conf *server;
143 unsigned use_namespace:1;
144 };
145
146 #define NIL (void *)0x1
147 #define LIST (void *)0x2
148
149 struct imap_list {
150 struct imap_list *next, *child;
151 char *val;
152 int len;
153 };
154
155 struct imap_socket {
156 int fd[2];
157 SSL *ssl;
158 };
159
160 struct imap_buffer {
161 struct imap_socket sock;
162 int bytes;
163 int offset;
164 char buf[1024];
165 };
166
167 struct imap_cmd;
168
169 struct imap {
170 int uidnext; /* from SELECT responses */
171 struct imap_list *ns_personal, *ns_other, *ns_shared; /* NAMESPACE info */
172 unsigned caps, rcaps; /* CAPABILITY results */
173 /* command queue */
174 int nexttag, num_in_progress, literal_pending;
175 struct imap_cmd *in_progress, **in_progress_append;
176 struct imap_buffer buf; /* this is BIG, so put it last */
177 };
178
179 struct imap_store {
180 struct store gen;
181 int uidvalidity;
182 struct imap *imap;
183 const char *prefix;
184 unsigned /*currentnc:1,*/ trashnc:1;
185 };
186
187 struct imap_cmd_cb {
188 int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
189 void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
190 void *ctx;
191 char *data;
192 int dlen;
193 int uid;
194 unsigned create:1, trycreate:1;
195 };
196
197 struct imap_cmd {
198 struct imap_cmd *next;
199 struct imap_cmd_cb cb;
200 char *cmd;
201 int tag;
202 };
203
204 #define CAP(cap) (imap->caps & (1 << (cap)))
205
206 enum CAPABILITY {
207 NOLOGIN = 0,
208 UIDPLUS,
209 LITERALPLUS,
210 NAMESPACE,
211 STARTTLS,
212 };
213
214 static const char *cap_list[] = {
215 "LOGINDISABLED",
216 "UIDPLUS",
217 "LITERAL+",
218 "NAMESPACE",
219 "STARTTLS",
220 };
221
222 #define RESP_OK 0
223 #define RESP_NO 1
224 #define RESP_BAD 2
225
226 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
227
228
229 static const char *Flags[] = {
230 "Draft",
231 "Flagged",
232 "Answered",
233 "Seen",
234 "Deleted",
235 };
236
237 #ifndef NO_OPENSSL
238 static void ssl_socket_perror(const char *func)
239 {
240 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
241 }
242 #endif
243
244 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
245 {
246 #ifndef NO_OPENSSL
247 if (sock->ssl) {
248 int sslerr = SSL_get_error(sock->ssl, ret);
249 switch (sslerr) {
250 case SSL_ERROR_NONE:
251 break;
252 case SSL_ERROR_SYSCALL:
253 perror("SSL_connect");
254 break;
255 default:
256 ssl_socket_perror("SSL_connect");
257 break;
258 }
259 } else
260 #endif
261 {
262 if (ret < 0)
263 perror(func);
264 else
265 fprintf(stderr, "%s: unexpected EOF\n", func);
266 }
267 }
268
269 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
270 {
271 #ifdef NO_OPENSSL
272 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
273 return -1;
274 #else
275 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
276 const SSL_METHOD *meth;
277 #else
278 SSL_METHOD *meth;
279 #endif
280 SSL_CTX *ctx;
281 int ret;
282
283 SSL_library_init();
284 SSL_load_error_strings();
285
286 if (use_tls_only)
287 meth = TLSv1_method();
288 else
289 meth = SSLv23_method();
290
291 if (!meth) {
292 ssl_socket_perror("SSLv23_method");
293 return -1;
294 }
295
296 ctx = SSL_CTX_new(meth);
297
298 if (verify)
299 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
300
301 if (!SSL_CTX_set_default_verify_paths(ctx)) {
302 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
303 return -1;
304 }
305 sock->ssl = SSL_new(ctx);
306 if (!sock->ssl) {
307 ssl_socket_perror("SSL_new");
308 return -1;
309 }
310 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
311 ssl_socket_perror("SSL_set_rfd");
312 return -1;
313 }
314 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
315 ssl_socket_perror("SSL_set_wfd");
316 return -1;
317 }
318
319 ret = SSL_connect(sock->ssl);
320 if (ret <= 0) {
321 socket_perror("SSL_connect", sock, ret);
322 return -1;
323 }
324
325 return 0;
326 #endif
327 }
328
329 static int socket_read(struct imap_socket *sock, char *buf, int len)
330 {
331 ssize_t n;
332 #ifndef NO_OPENSSL
333 if (sock->ssl)
334 n = SSL_read(sock->ssl, buf, len);
335 else
336 #endif
337 n = xread(sock->fd[0], buf, len);
338 if (n <= 0) {
339 socket_perror("read", sock, n);
340 close(sock->fd[0]);
341 close(sock->fd[1]);
342 sock->fd[0] = sock->fd[1] = -1;
343 }
344 return n;
345 }
346
347 static int socket_write(struct imap_socket *sock, const char *buf, int len)
348 {
349 int n;
350 #ifndef NO_OPENSSL
351 if (sock->ssl)
352 n = SSL_write(sock->ssl, buf, len);
353 else
354 #endif
355 n = write_in_full(sock->fd[1], buf, len);
356 if (n != len) {
357 socket_perror("write", sock, n);
358 close(sock->fd[0]);
359 close(sock->fd[1]);
360 sock->fd[0] = sock->fd[1] = -1;
361 }
362 return n;
363 }
364
365 static void socket_shutdown(struct imap_socket *sock)
366 {
367 #ifndef NO_OPENSSL
368 if (sock->ssl) {
369 SSL_shutdown(sock->ssl);
370 SSL_free(sock->ssl);
371 }
372 #endif
373 close(sock->fd[0]);
374 close(sock->fd[1]);
375 }
376
377 /* simple line buffering */
378 static int buffer_gets(struct imap_buffer *b, char **s)
379 {
380 int n;
381 int start = b->offset;
382
383 *s = b->buf + start;
384
385 for (;;) {
386 /* make sure we have enough data to read the \r\n sequence */
387 if (b->offset + 1 >= b->bytes) {
388 if (start) {
389 /* shift down used bytes */
390 *s = b->buf;
391
392 assert(start <= b->bytes);
393 n = b->bytes - start;
394
395 if (n)
396 memmove(b->buf, b->buf + start, n);
397 b->offset -= start;
398 b->bytes = n;
399 start = 0;
400 }
401
402 n = socket_read(&b->sock, b->buf + b->bytes,
403 sizeof(b->buf) - b->bytes);
404
405 if (n <= 0)
406 return -1;
407
408 b->bytes += n;
409 }
410
411 if (b->buf[b->offset] == '\r') {
412 assert(b->offset + 1 < b->bytes);
413 if (b->buf[b->offset + 1] == '\n') {
414 b->buf[b->offset] = 0; /* terminate the string */
415 b->offset += 2; /* next line */
416 if (Verbose)
417 puts(*s);
418 return 0;
419 }
420 }
421
422 b->offset++;
423 }
424 /* not reached */
425 }
426
427 static void imap_info(const char *msg, ...)
428 {
429 va_list va;
430
431 if (!Quiet) {
432 va_start(va, msg);
433 vprintf(msg, va);
434 va_end(va);
435 fflush(stdout);
436 }
437 }
438
439 static void imap_warn(const char *msg, ...)
440 {
441 va_list va;
442
443 if (Quiet < 2) {
444 va_start(va, msg);
445 vfprintf(stderr, msg, va);
446 va_end(va);
447 }
448 }
449
450 static char *next_arg(char **s)
451 {
452 char *ret;
453
454 if (!s || !*s)
455 return NULL;
456 while (isspace((unsigned char) **s))
457 (*s)++;
458 if (!**s) {
459 *s = NULL;
460 return NULL;
461 }
462 if (**s == '"') {
463 ++*s;
464 ret = *s;
465 *s = strchr(*s, '"');
466 } else {
467 ret = *s;
468 while (**s && !isspace((unsigned char) **s))
469 (*s)++;
470 }
471 if (*s) {
472 if (**s)
473 *(*s)++ = 0;
474 if (!**s)
475 *s = NULL;
476 }
477 return ret;
478 }
479
480 static void free_generic_messages(struct message *msgs)
481 {
482 struct message *tmsg;
483
484 for (; msgs; msgs = tmsg) {
485 tmsg = msgs->next;
486 free(msgs);
487 }
488 }
489
490 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
491 {
492 int ret;
493 va_list va;
494
495 va_start(va, fmt);
496 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
497 die("Fatal: buffer too small. Please report a bug.");
498 va_end(va);
499 return ret;
500 }
501
502 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
503 struct imap_cmd_cb *cb,
504 const char *fmt, va_list ap)
505 {
506 struct imap *imap = ctx->imap;
507 struct imap_cmd *cmd;
508 int n, bufl;
509 char buf[1024];
510
511 cmd = xmalloc(sizeof(struct imap_cmd));
512 nfvasprintf(&cmd->cmd, fmt, ap);
513 cmd->tag = ++imap->nexttag;
514
515 if (cb)
516 cmd->cb = *cb;
517 else
518 memset(&cmd->cb, 0, sizeof(cmd->cb));
519
520 while (imap->literal_pending)
521 get_cmd_result(ctx, NULL);
522
523 bufl = nfsnprintf(buf, sizeof(buf), cmd->cb.data ? CAP(LITERALPLUS) ?
524 "%d %s{%d+}\r\n" : "%d %s{%d}\r\n" : "%d %s\r\n",
525 cmd->tag, cmd->cmd, cmd->cb.dlen);
526 if (Verbose) {
527 if (imap->num_in_progress)
528 printf("(%d in progress) ", imap->num_in_progress);
529 if (memcmp(cmd->cmd, "LOGIN", 5))
530 printf(">>> %s", buf);
531 else
532 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
533 }
534 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
535 free(cmd->cmd);
536 free(cmd);
537 if (cb)
538 free(cb->data);
539 return NULL;
540 }
541 if (cmd->cb.data) {
542 if (CAP(LITERALPLUS)) {
543 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
544 free(cmd->cb.data);
545 if (n != cmd->cb.dlen ||
546 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
547 free(cmd->cmd);
548 free(cmd);
549 return NULL;
550 }
551 cmd->cb.data = NULL;
552 } else
553 imap->literal_pending = 1;
554 } else if (cmd->cb.cont)
555 imap->literal_pending = 1;
556 cmd->next = NULL;
557 *imap->in_progress_append = cmd;
558 imap->in_progress_append = &cmd->next;
559 imap->num_in_progress++;
560 return cmd;
561 }
562
563 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
564 struct imap_cmd_cb *cb,
565 const char *fmt, ...)
566 {
567 struct imap_cmd *ret;
568 va_list ap;
569
570 va_start(ap, fmt);
571 ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
572 va_end(ap);
573 return ret;
574 }
575
576 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
577 const char *fmt, ...)
578 {
579 va_list ap;
580 struct imap_cmd *cmdp;
581
582 va_start(ap, fmt);
583 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
584 va_end(ap);
585 if (!cmdp)
586 return RESP_BAD;
587
588 return get_cmd_result(ctx, cmdp);
589 }
590
591 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
592 const char *fmt, ...)
593 {
594 va_list ap;
595 struct imap_cmd *cmdp;
596
597 va_start(ap, fmt);
598 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
599 va_end(ap);
600 if (!cmdp)
601 return DRV_STORE_BAD;
602
603 switch (get_cmd_result(ctx, cmdp)) {
604 case RESP_BAD: return DRV_STORE_BAD;
605 case RESP_NO: return DRV_MSG_BAD;
606 default: return DRV_OK;
607 }
608 }
609
610 static int is_atom(struct imap_list *list)
611 {
612 return list && list->val && list->val != NIL && list->val != LIST;
613 }
614
615 static int is_list(struct imap_list *list)
616 {
617 return list && list->val == LIST;
618 }
619
620 static void free_list(struct imap_list *list)
621 {
622 struct imap_list *tmp;
623
624 for (; list; list = tmp) {
625 tmp = list->next;
626 if (is_list(list))
627 free_list(list->child);
628 else if (is_atom(list))
629 free(list->val);
630 free(list);
631 }
632 }
633
634 static int parse_imap_list_l(struct imap *imap, char **sp, struct imap_list **curp, int level)
635 {
636 struct imap_list *cur;
637 char *s = *sp, *p;
638 int n, bytes;
639
640 for (;;) {
641 while (isspace((unsigned char)*s))
642 s++;
643 if (level && *s == ')') {
644 s++;
645 break;
646 }
647 *curp = cur = xmalloc(sizeof(*cur));
648 curp = &cur->next;
649 cur->val = NULL; /* for clean bail */
650 if (*s == '(') {
651 /* sublist */
652 s++;
653 cur->val = LIST;
654 if (parse_imap_list_l(imap, &s, &cur->child, level + 1))
655 goto bail;
656 } else if (imap && *s == '{') {
657 /* literal */
658 bytes = cur->len = strtol(s + 1, &s, 10);
659 if (*s != '}')
660 goto bail;
661
662 s = cur->val = xmalloc(cur->len);
663
664 /* dump whats left over in the input buffer */
665 n = imap->buf.bytes - imap->buf.offset;
666
667 if (n > bytes)
668 /* the entire message fit in the buffer */
669 n = bytes;
670
671 memcpy(s, imap->buf.buf + imap->buf.offset, n);
672 s += n;
673 bytes -= n;
674
675 /* mark that we used part of the buffer */
676 imap->buf.offset += n;
677
678 /* now read the rest of the message */
679 while (bytes > 0) {
680 if ((n = socket_read(&imap->buf.sock, s, bytes)) <= 0)
681 goto bail;
682 s += n;
683 bytes -= n;
684 }
685
686 if (buffer_gets(&imap->buf, &s))
687 goto bail;
688 } else if (*s == '"') {
689 /* quoted string */
690 s++;
691 p = s;
692 for (; *s != '"'; s++)
693 if (!*s)
694 goto bail;
695 cur->len = s - p;
696 s++;
697 cur->val = xmemdupz(p, cur->len);
698 } else {
699 /* atom */
700 p = s;
701 for (; *s && !isspace((unsigned char)*s); s++)
702 if (level && *s == ')')
703 break;
704 cur->len = s - p;
705 if (cur->len == 3 && !memcmp("NIL", p, 3))
706 cur->val = NIL;
707 else
708 cur->val = xmemdupz(p, cur->len);
709 }
710
711 if (!level)
712 break;
713 if (!*s)
714 goto bail;
715 }
716 *sp = s;
717 *curp = NULL;
718 return 0;
719
720 bail:
721 *curp = NULL;
722 return -1;
723 }
724
725 static struct imap_list *parse_imap_list(struct imap *imap, char **sp)
726 {
727 struct imap_list *head;
728
729 if (!parse_imap_list_l(imap, sp, &head, 0))
730 return head;
731 free_list(head);
732 return NULL;
733 }
734
735 static struct imap_list *parse_list(char **sp)
736 {
737 return parse_imap_list(NULL, sp);
738 }
739
740 static void parse_capability(struct imap *imap, char *cmd)
741 {
742 char *arg;
743 unsigned i;
744
745 imap->caps = 0x80000000;
746 while ((arg = next_arg(&cmd)))
747 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
748 if (!strcmp(cap_list[i], arg))
749 imap->caps |= 1 << i;
750 imap->rcaps = imap->caps;
751 }
752
753 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
754 char *s)
755 {
756 struct imap *imap = ctx->imap;
757 char *arg, *p;
758
759 if (*s != '[')
760 return RESP_OK; /* no response code */
761 s++;
762 if (!(p = strchr(s, ']'))) {
763 fprintf(stderr, "IMAP error: malformed response code\n");
764 return RESP_BAD;
765 }
766 *p++ = 0;
767 arg = next_arg(&s);
768 if (!strcmp("UIDVALIDITY", arg)) {
769 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
770 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
771 return RESP_BAD;
772 }
773 } else if (!strcmp("UIDNEXT", arg)) {
774 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
775 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
776 return RESP_BAD;
777 }
778 } else if (!strcmp("CAPABILITY", arg)) {
779 parse_capability(imap, s);
780 } else if (!strcmp("ALERT", arg)) {
781 /* RFC2060 says that these messages MUST be displayed
782 * to the user
783 */
784 for (; isspace((unsigned char)*p); p++);
785 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
786 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
787 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
788 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
789 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
790 return RESP_BAD;
791 }
792 }
793 return RESP_OK;
794 }
795
796 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
797 {
798 struct imap *imap = ctx->imap;
799 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
800 char *cmd, *arg, *arg1, *p;
801 int n, resp, resp2, tag;
802
803 for (;;) {
804 if (buffer_gets(&imap->buf, &cmd))
805 return RESP_BAD;
806
807 arg = next_arg(&cmd);
808 if (*arg == '*') {
809 arg = next_arg(&cmd);
810 if (!arg) {
811 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
812 return RESP_BAD;
813 }
814
815 if (!strcmp("NAMESPACE", arg)) {
816 imap->ns_personal = parse_list(&cmd);
817 imap->ns_other = parse_list(&cmd);
818 imap->ns_shared = parse_list(&cmd);
819 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
820 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
821 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
822 return resp;
823 } else if (!strcmp("CAPABILITY", arg))
824 parse_capability(imap, cmd);
825 else if ((arg1 = next_arg(&cmd))) {
826 if (!strcmp("EXISTS", arg1))
827 ctx->gen.count = atoi(arg);
828 else if (!strcmp("RECENT", arg1))
829 ctx->gen.recent = atoi(arg);
830 } else {
831 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
832 return RESP_BAD;
833 }
834 } else if (!imap->in_progress) {
835 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
836 return RESP_BAD;
837 } else if (*arg == '+') {
838 /* This can happen only with the last command underway, as
839 it enforces a round-trip. */
840 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
841 offsetof(struct imap_cmd, next));
842 if (cmdp->cb.data) {
843 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
844 free(cmdp->cb.data);
845 cmdp->cb.data = NULL;
846 if (n != (int)cmdp->cb.dlen)
847 return RESP_BAD;
848 } else if (cmdp->cb.cont) {
849 if (cmdp->cb.cont(ctx, cmdp, cmd))
850 return RESP_BAD;
851 } else {
852 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
853 return RESP_BAD;
854 }
855 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
856 return RESP_BAD;
857 if (!cmdp->cb.cont)
858 imap->literal_pending = 0;
859 if (!tcmd)
860 return DRV_OK;
861 } else {
862 tag = atoi(arg);
863 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
864 if (cmdp->tag == tag)
865 goto gottag;
866 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
867 return RESP_BAD;
868 gottag:
869 if (!(*pcmdp = cmdp->next))
870 imap->in_progress_append = pcmdp;
871 imap->num_in_progress--;
872 if (cmdp->cb.cont || cmdp->cb.data)
873 imap->literal_pending = 0;
874 arg = next_arg(&cmd);
875 if (!strcmp("OK", arg))
876 resp = DRV_OK;
877 else {
878 if (!strcmp("NO", arg)) {
879 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
880 p = strchr(cmdp->cmd, '"');
881 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", strchr(p + 1, '"') - p + 1, p)) {
882 resp = RESP_BAD;
883 goto normal;
884 }
885 /* not waiting here violates the spec, but a server that does not
886 grok this nonetheless violates it too. */
887 cmdp->cb.create = 0;
888 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
889 resp = RESP_BAD;
890 goto normal;
891 }
892 free(cmdp->cmd);
893 free(cmdp);
894 if (!tcmd)
895 return 0; /* ignored */
896 if (cmdp == tcmd)
897 tcmd = ncmdp;
898 continue;
899 }
900 resp = RESP_NO;
901 } else /*if (!strcmp("BAD", arg))*/
902 resp = RESP_BAD;
903 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
904 memcmp(cmdp->cmd, "LOGIN", 5) ?
905 cmdp->cmd : "LOGIN <user> <pass>",
906 arg, cmd ? cmd : "");
907 }
908 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
909 resp = resp2;
910 normal:
911 if (cmdp->cb.done)
912 cmdp->cb.done(ctx, cmdp, resp);
913 free(cmdp->cb.data);
914 free(cmdp->cmd);
915 free(cmdp);
916 if (!tcmd || tcmd == cmdp)
917 return resp;
918 }
919 }
920 /* not reached */
921 }
922
923 static void imap_close_server(struct imap_store *ictx)
924 {
925 struct imap *imap = ictx->imap;
926
927 if (imap->buf.sock.fd[0] != -1) {
928 imap_exec(ictx, NULL, "LOGOUT");
929 socket_shutdown(&imap->buf.sock);
930 }
931 free_list(imap->ns_personal);
932 free_list(imap->ns_other);
933 free_list(imap->ns_shared);
934 free(imap);
935 }
936
937 static void imap_close_store(struct store *ctx)
938 {
939 imap_close_server((struct imap_store *)ctx);
940 free_generic_messages(ctx->msgs);
941 free(ctx);
942 }
943
944 static struct store *imap_open_store(struct imap_server_conf *srvc)
945 {
946 struct imap_store *ctx;
947 struct imap *imap;
948 char *arg, *rsp;
949 int s = -1, preauth;
950
951 ctx = xcalloc(sizeof(*ctx), 1);
952
953 ctx->imap = imap = xcalloc(sizeof(*imap), 1);
954 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
955 imap->in_progress_append = &imap->in_progress;
956
957 /* open connection to IMAP server */
958
959 if (srvc->tunnel) {
960 const char *argv[4];
961 struct child_process tunnel = {0};
962
963 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
964
965 argv[0] = "sh";
966 argv[1] = "-c";
967 argv[2] = srvc->tunnel;
968 argv[3] = NULL;
969
970 tunnel.argv = argv;
971 tunnel.in = -1;
972 tunnel.out = -1;
973 if (start_command(&tunnel))
974 die("cannot start proxy %s", argv[0]);
975
976 imap->buf.sock.fd[0] = tunnel.out;
977 imap->buf.sock.fd[1] = tunnel.in;
978
979 imap_info("ok\n");
980 } else {
981 #ifndef NO_IPV6
982 struct addrinfo hints, *ai0, *ai;
983 int gai;
984 char portstr[6];
985
986 snprintf(portstr, sizeof(portstr), "%hu", srvc->port);
987
988 memset(&hints, 0, sizeof(hints));
989 hints.ai_socktype = SOCK_STREAM;
990 hints.ai_protocol = IPPROTO_TCP;
991
992 imap_info("Resolving %s... ", srvc->host);
993 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
994 if (gai) {
995 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
996 goto bail;
997 }
998 imap_info("ok\n");
999
1000 for (ai0 = ai; ai; ai = ai->ai_next) {
1001 char addr[NI_MAXHOST];
1002
1003 s = socket(ai->ai_family, ai->ai_socktype,
1004 ai->ai_protocol);
1005 if (s < 0)
1006 continue;
1007
1008 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
1009 sizeof(addr), NULL, 0, NI_NUMERICHOST);
1010 imap_info("Connecting to [%s]:%s... ", addr, portstr);
1011
1012 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
1013 close(s);
1014 s = -1;
1015 perror("connect");
1016 continue;
1017 }
1018
1019 break;
1020 }
1021 freeaddrinfo(ai0);
1022 #else /* NO_IPV6 */
1023 struct hostent *he;
1024 struct sockaddr_in addr;
1025
1026 memset(&addr, 0, sizeof(addr));
1027 addr.sin_port = htons(srvc->port);
1028 addr.sin_family = AF_INET;
1029
1030 imap_info("Resolving %s... ", srvc->host);
1031 he = gethostbyname(srvc->host);
1032 if (!he) {
1033 perror("gethostbyname");
1034 goto bail;
1035 }
1036 imap_info("ok\n");
1037
1038 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
1039
1040 s = socket(PF_INET, SOCK_STREAM, 0);
1041
1042 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
1043 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
1044 close(s);
1045 s = -1;
1046 perror("connect");
1047 }
1048 #endif
1049 if (s < 0) {
1050 fputs("Error: unable to connect to server.\n", stderr);
1051 goto bail;
1052 }
1053
1054 imap->buf.sock.fd[0] = s;
1055 imap->buf.sock.fd[1] = dup(s);
1056
1057 if (srvc->use_ssl &&
1058 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
1059 close(s);
1060 goto bail;
1061 }
1062 imap_info("ok\n");
1063 }
1064
1065 /* read the greeting string */
1066 if (buffer_gets(&imap->buf, &rsp)) {
1067 fprintf(stderr, "IMAP error: no greeting response\n");
1068 goto bail;
1069 }
1070 arg = next_arg(&rsp);
1071 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1072 fprintf(stderr, "IMAP error: invalid greeting response\n");
1073 goto bail;
1074 }
1075 preauth = 0;
1076 if (!strcmp("PREAUTH", arg))
1077 preauth = 1;
1078 else if (strcmp("OK", arg) != 0) {
1079 fprintf(stderr, "IMAP error: unknown greeting response\n");
1080 goto bail;
1081 }
1082 parse_response_code(ctx, NULL, rsp);
1083 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1084 goto bail;
1085
1086 if (!preauth) {
1087 #ifndef NO_OPENSSL
1088 if (!srvc->use_ssl && CAP(STARTTLS)) {
1089 if (imap_exec(ctx, 0, "STARTTLS") != RESP_OK)
1090 goto bail;
1091 if (ssl_socket_connect(&imap->buf.sock, 1,
1092 srvc->ssl_verify))
1093 goto bail;
1094 /* capabilities may have changed, so get the new capabilities */
1095 if (imap_exec(ctx, 0, "CAPABILITY") != RESP_OK)
1096 goto bail;
1097 }
1098 #endif
1099 imap_info("Logging in...\n");
1100 if (!srvc->user) {
1101 fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1102 goto bail;
1103 }
1104 if (!srvc->pass) {
1105 char prompt[80];
1106 sprintf(prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1107 arg = getpass(prompt);
1108 if (!arg) {
1109 perror("getpass");
1110 exit(1);
1111 }
1112 if (!*arg) {
1113 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1114 goto bail;
1115 }
1116 /*
1117 * getpass() returns a pointer to a static buffer. make a copy
1118 * for long term storage.
1119 */
1120 srvc->pass = xstrdup(arg);
1121 }
1122 if (CAP(NOLOGIN)) {
1123 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1124 goto bail;
1125 }
1126 if (!imap->buf.sock.ssl)
1127 imap_warn("*** IMAP Warning *** Password is being "
1128 "sent in the clear\n");
1129 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1130 fprintf(stderr, "IMAP error: LOGIN failed\n");
1131 goto bail;
1132 }
1133 } /* !preauth */
1134
1135 ctx->prefix = "";
1136 ctx->trashnc = 1;
1137 return (struct store *)ctx;
1138
1139 bail:
1140 imap_close_store(&ctx->gen);
1141 return NULL;
1142 }
1143
1144 static int imap_make_flags(int flags, char *buf)
1145 {
1146 const char *s;
1147 unsigned i, d;
1148
1149 for (i = d = 0; i < ARRAY_SIZE(Flags); i++)
1150 if (flags & (1 << i)) {
1151 buf[d++] = ' ';
1152 buf[d++] = '\\';
1153 for (s = Flags[i]; *s; s++)
1154 buf[d++] = *s;
1155 }
1156 buf[0] = '(';
1157 buf[d++] = ')';
1158 return d;
1159 }
1160
1161 static int imap_store_msg(struct store *gctx, struct msg_data *data)
1162 {
1163 struct imap_store *ctx = (struct imap_store *)gctx;
1164 struct imap *imap = ctx->imap;
1165 struct imap_cmd_cb cb;
1166 const char *prefix, *box;
1167 int ret, d;
1168 char flagstr[128];
1169
1170 memset(&cb, 0, sizeof(cb));
1171
1172 cb.dlen = data->len;
1173 cb.data = xmalloc(cb.dlen);
1174 memcpy(cb.data, data->data, data->len);
1175
1176 d = 0;
1177 if (data->flags) {
1178 d = imap_make_flags(data->flags, flagstr);
1179 flagstr[d++] = ' ';
1180 }
1181 flagstr[d] = 0;
1182
1183 box = gctx->name;
1184 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1185 cb.create = 0;
1186 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" %s", prefix, box, flagstr);
1187 imap->caps = imap->rcaps;
1188 if (ret != DRV_OK)
1189 return ret;
1190 gctx->count++;
1191
1192 return DRV_OK;
1193 }
1194
1195 static void encode_html_chars(struct strbuf *p)
1196 {
1197 int i;
1198 for (i = 0; i < p->len; i++) {
1199 if (p->buf[i] == '&')
1200 strbuf_splice(p, i, 1, "&amp;", 5);
1201 if (p->buf[i] == '<')
1202 strbuf_splice(p, i, 1, "&lt;", 4);
1203 if (p->buf[i] == '>')
1204 strbuf_splice(p, i, 1, "&gt;", 4);
1205 if (p->buf[i] == '"')
1206 strbuf_splice(p, i, 1, "&quot;", 6);
1207 }
1208 }
1209 static void wrap_in_html(struct msg_data *msg)
1210 {
1211 struct strbuf buf = STRBUF_INIT;
1212 struct strbuf **lines;
1213 struct strbuf **p;
1214 static char *content_type = "Content-Type: text/html;\n";
1215 static char *pre_open = "<pre>\n";
1216 static char *pre_close = "</pre>\n";
1217 int added_header = 0;
1218
1219 strbuf_attach(&buf, msg->data, msg->len, msg->len);
1220 lines = strbuf_split(&buf, '\n');
1221 strbuf_release(&buf);
1222 for (p = lines; *p; p++) {
1223 if (! added_header) {
1224 if ((*p)->len == 1 && *((*p)->buf) == '\n') {
1225 strbuf_addstr(&buf, content_type);
1226 strbuf_addbuf(&buf, *p);
1227 strbuf_addstr(&buf, pre_open);
1228 added_header = 1;
1229 continue;
1230 }
1231 }
1232 else
1233 encode_html_chars(*p);
1234 strbuf_addbuf(&buf, *p);
1235 }
1236 strbuf_addstr(&buf, pre_close);
1237 strbuf_list_free(lines);
1238 msg->len = buf.len;
1239 msg->data = strbuf_detach(&buf, NULL);
1240 }
1241
1242 #define CHUNKSIZE 0x1000
1243
1244 static int read_message(FILE *f, struct msg_data *msg)
1245 {
1246 struct strbuf buf = STRBUF_INIT;
1247
1248 memset(msg, 0, sizeof(*msg));
1249
1250 do {
1251 if (strbuf_fread(&buf, CHUNKSIZE, f) <= 0)
1252 break;
1253 } while (!feof(f));
1254
1255 msg->len = buf.len;
1256 msg->data = strbuf_detach(&buf, NULL);
1257 return msg->len;
1258 }
1259
1260 static int count_messages(struct msg_data *msg)
1261 {
1262 int count = 0;
1263 char *p = msg->data;
1264
1265 while (1) {
1266 if (!prefixcmp(p, "From ")) {
1267 count++;
1268 p += 5;
1269 }
1270 p = strstr(p+5, "\nFrom ");
1271 if (!p)
1272 break;
1273 p++;
1274 }
1275 return count;
1276 }
1277
1278 static int split_msg(struct msg_data *all_msgs, struct msg_data *msg, int *ofs)
1279 {
1280 char *p, *data;
1281
1282 memset(msg, 0, sizeof *msg);
1283 if (*ofs >= all_msgs->len)
1284 return 0;
1285
1286 data = &all_msgs->data[*ofs];
1287 msg->len = all_msgs->len - *ofs;
1288
1289 if (msg->len < 5 || prefixcmp(data, "From "))
1290 return 0;
1291
1292 p = strchr(data, '\n');
1293 if (p) {
1294 p = &p[1];
1295 msg->len -= p-data;
1296 *ofs += p-data;
1297 data = p;
1298 }
1299
1300 p = strstr(data, "\nFrom ");
1301 if (p)
1302 msg->len = &p[1] - data;
1303
1304 msg->data = xmemdupz(data, msg->len);
1305 *ofs += msg->len;
1306 return 1;
1307 }
1308
1309 static struct imap_server_conf server = {
1310 NULL, /* name */
1311 NULL, /* tunnel */
1312 NULL, /* host */
1313 0, /* port */
1314 NULL, /* user */
1315 NULL, /* pass */
1316 0, /* use_ssl */
1317 1, /* ssl_verify */
1318 0, /* use_html */
1319 };
1320
1321 static char *imap_folder;
1322
1323 static int git_imap_config(const char *key, const char *val, void *cb)
1324 {
1325 char imap_key[] = "imap.";
1326
1327 if (strncmp(key, imap_key, sizeof imap_key - 1))
1328 return 0;
1329
1330 if (!val)
1331 return config_error_nonbool(key);
1332
1333 key += sizeof imap_key - 1;
1334
1335 if (!strcmp("folder", key)) {
1336 imap_folder = xstrdup(val);
1337 } else if (!strcmp("host", key)) {
1338 if (!prefixcmp(val, "imap:"))
1339 val += 5;
1340 else if (!prefixcmp(val, "imaps:")) {
1341 val += 6;
1342 server.use_ssl = 1;
1343 }
1344 if (!prefixcmp(val, "//"))
1345 val += 2;
1346 server.host = xstrdup(val);
1347 } else if (!strcmp("user", key))
1348 server.user = xstrdup(val);
1349 else if (!strcmp("pass", key))
1350 server.pass = xstrdup(val);
1351 else if (!strcmp("port", key))
1352 server.port = git_config_int(key, val);
1353 else if (!strcmp("tunnel", key))
1354 server.tunnel = xstrdup(val);
1355 else if (!strcmp("sslverify", key))
1356 server.ssl_verify = git_config_bool(key, val);
1357 else if (!strcmp("preformattedHTML", key))
1358 server.use_html = git_config_bool(key, val);
1359 return 0;
1360 }
1361
1362 int main(int argc, char **argv)
1363 {
1364 struct msg_data all_msgs, msg;
1365 struct store *ctx = NULL;
1366 int ofs = 0;
1367 int r;
1368 int total, n = 0;
1369 int nongit_ok;
1370
1371 git_extract_argv0_path(argv[0]);
1372
1373 setup_git_directory_gently(&nongit_ok);
1374 git_config(git_imap_config, NULL);
1375
1376 if (!server.port)
1377 server.port = server.use_ssl ? 993 : 143;
1378
1379 if (!imap_folder) {
1380 fprintf(stderr, "no imap store specified\n");
1381 return 1;
1382 }
1383 if (!server.host) {
1384 if (!server.tunnel) {
1385 fprintf(stderr, "no imap host specified\n");
1386 return 1;
1387 }
1388 server.host = "tunnel";
1389 }
1390
1391 /* read the messages */
1392 if (!read_message(stdin, &all_msgs)) {
1393 fprintf(stderr, "nothing to send\n");
1394 return 1;
1395 }
1396
1397 total = count_messages(&all_msgs);
1398 if (!total) {
1399 fprintf(stderr, "no messages to send\n");
1400 return 1;
1401 }
1402
1403 /* write it to the imap server */
1404 ctx = imap_open_store(&server);
1405 if (!ctx) {
1406 fprintf(stderr, "failed to open store\n");
1407 return 1;
1408 }
1409
1410 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1411 ctx->name = imap_folder;
1412 while (1) {
1413 unsigned percent = n * 100 / total;
1414 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1415 if (!split_msg(&all_msgs, &msg, &ofs))
1416 break;
1417 if (server.use_html)
1418 wrap_in_html(&msg);
1419 r = imap_store_msg(ctx, &msg);
1420 if (r != DRV_OK)
1421 break;
1422 n++;
1423 }
1424 fprintf(stderr, "\n");
1425
1426 imap_close_store(ctx);
1427
1428 return 0;
1429 }
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