Commit | Line | Data |
---|---|---|
9c0f2dac RS |
1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
2 | Copyright (c) 1991,1993 Free Software Foundation, Inc. | |
3 | Written by Jonathan Kamens, jik@security.ov.com. | |
4 | ||
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
9c0f2dac | 21 | |
8148baf9 RS |
22 | #ifdef HAVE_CONFIG_H |
23 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ | |
c9c3d8f6 | 24 | #include <../src/config.h> |
8148baf9 RS |
25 | #else |
26 | #define MAIL_USE_POP | |
27 | #endif | |
c9c3d8f6 | 28 | |
8148baf9 RS |
29 | #ifdef MAIL_USE_POP |
30 | ||
31 | #ifdef HAVE_CONFIG_H | |
32 | /* Cancel these substitutions made in config.h */ | |
33 | #undef open | |
6d683104 RS |
34 | #undef read |
35 | #undef write | |
8148baf9 RS |
36 | #undef close |
37 | #endif | |
9c0f2dac RS |
38 | |
39 | #include <sys/types.h> | |
40 | #include <netinet/in.h> | |
41 | #include <sys/socket.h> | |
42 | #include <pop.h> | |
625ad89f | 43 | |
9c0f2dac RS |
44 | #ifdef sun |
45 | #include <malloc.h> | |
8148baf9 | 46 | #endif /* sun */ |
625ad89f | 47 | |
9c0f2dac RS |
48 | #ifdef HESIOD |
49 | #include <hesiod.h> | |
50 | /* | |
51 | * It really shouldn't be necessary to put this declaration here, but | |
52 | * the version of hesiod.h that Athena has installed in release 7.2 | |
53 | * doesn't declare this function; I don't know if the 7.3 version of | |
54 | * hesiod.h does. | |
55 | */ | |
56 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
57 | #endif | |
625ad89f | 58 | |
9c0f2dac | 59 | #include <pwd.h> |
9c0f2dac RS |
60 | #include <netdb.h> |
61 | #include <errno.h> | |
62 | #include <stdio.h> | |
625ad89f | 63 | |
9c0f2dac RS |
64 | #ifdef KERBEROS |
65 | #ifndef KRB5 | |
9c0f2dac | 66 | #include <des.h> |
7a481e50 | 67 | #include <krb.h> |
9c0f2dac RS |
68 | #else /* KRB5 */ |
69 | #include <krb5/krb5.h> | |
70 | #include <krb5/ext-proto.h> | |
71 | #include <ctype.h> | |
72 | #endif /* KRB5 */ | |
8148baf9 | 73 | #endif /* KERBEROS */ |
9c0f2dac | 74 | |
8148baf9 RS |
75 | extern char *getenv (/* char * */); |
76 | extern char *getlogin (/* void */); | |
77 | extern char *getpass (/* char * */); | |
78 | extern char *strerror (/* int */); | |
79 | ||
80 | #ifdef KERBEROS | |
81 | #ifndef KRB5 | |
9c0f2dac | 82 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
83 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
84 | struct sockaddr_in *, struct sockaddr_in *, | |
85 | char * */); | |
9c0f2dac | 86 | extern char *krb_realmofhost (/* char * */); |
8148baf9 RS |
87 | #endif /* ! KRB5 */ |
88 | #endif /* KERBEROS */ | |
9c0f2dac | 89 | |
8148baf9 | 90 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
91 | extern int h_errno; |
92 | #endif | |
93 | ||
94 | static int socket_connection (/* char *, int */); | |
95 | static char *getline (/* popserver */); | |
96 | static int sendline (/* popserver, char * */); | |
97 | static int fullwrite (/* int, char *, int */); | |
98 | static int getok (/* popserver */); | |
99 | #if 0 | |
100 | static int gettermination (/* popserver */); | |
101 | #endif | |
102 | static void pop_trash (/* popserver */); | |
8148baf9 | 103 | static char *find_crlf (/* char * */); |
7a481e50 | 104 | |
9c0f2dac RS |
105 | #define ERROR_MAX 80 /* a pretty arbitrary size */ |
106 | #define POP_PORT 110 | |
107 | #define KPOP_PORT 1109 | |
108 | #define POP_SERVICE "pop" | |
109 | #ifdef KERBEROS | |
110 | #ifdef KRB5 | |
111 | #define KPOP_SERVICE "k5pop"; | |
112 | #else | |
113 | #define KPOP_SERVICE "kpop" | |
114 | #endif | |
115 | #endif | |
116 | ||
117 | char pop_error[ERROR_MAX]; | |
118 | int pop_debug = 0; | |
119 | ||
120 | #ifndef min | |
121 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
122 | #endif | |
123 | ||
124 | /* | |
125 | * Function: pop_open (char *host, char *username, char *password, | |
126 | * int flags) | |
127 | * | |
128 | * Purpose: Establishes a connection with a post-office server, and | |
129 | * completes the authorization portion of the session. | |
130 | * | |
131 | * Arguments: | |
132 | * host The server host with which the connection should be | |
133 | * established. Optional. If omitted, internal | |
134 | * heuristics will be used to determine the server host, | |
135 | * if possible. | |
136 | * username | |
137 | * The username of the mail-drop to access. Optional. | |
138 | * If omitted, internal heuristics will be used to | |
139 | * determine the username, if possible. | |
140 | * password | |
141 | * The password to use for authorization. If omitted, | |
142 | * internal heuristics will be used to determine the | |
143 | * password, if possible. | |
144 | * flags A bit mask containing flags controlling certain | |
145 | * functions of the routine. Valid flags are defined in | |
146 | * the file pop.h | |
147 | * | |
148 | * Return value: Upon successful establishment of a connection, a | |
149 | * non-null popserver will be returned. Otherwise, null will be | |
150 | * returned, and the string variable pop_error will contain an | |
151 | * explanation of the error. | |
152 | */ | |
153 | popserver | |
154 | pop_open (host, username, password, flags) | |
155 | char *host; | |
156 | char *username; | |
157 | char *password; | |
158 | int flags; | |
159 | { | |
160 | int sock; | |
161 | popserver server; | |
162 | ||
163 | /* Determine the user name */ | |
164 | if (! username) | |
165 | { | |
166 | username = getenv ("USER"); | |
167 | if (! (username && *username)) | |
168 | { | |
169 | username = getlogin (); | |
170 | if (! (username && *username)) | |
171 | { | |
172 | struct passwd *passwd; | |
173 | passwd = getpwuid (getuid ()); | |
174 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
175 | { | |
176 | username = passwd->pw_name; | |
177 | } | |
178 | else | |
179 | { | |
180 | strcpy (pop_error, "Could not determine username"); | |
181 | return (0); | |
182 | } | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
187 | /* | |
188 | * Determine the mail host. | |
189 | */ | |
190 | ||
191 | if (! host) | |
192 | { | |
193 | host = getenv ("MAILHOST"); | |
194 | } | |
195 | ||
196 | #ifdef HESIOD | |
197 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
198 | { | |
199 | struct hes_postoffice *office; | |
200 | office = hes_getmailhost (username); | |
201 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
202 | && office->po_name && *office->po_name && office->po_host | |
203 | && *office->po_host) | |
204 | { | |
205 | host = office->po_host; | |
206 | username = office->po_name; | |
207 | } | |
208 | } | |
209 | #endif | |
210 | ||
211 | #ifdef MAILHOST | |
212 | if (! host) | |
213 | { | |
214 | host = MAILHOST; | |
215 | } | |
216 | #endif | |
217 | ||
218 | if (! host) | |
219 | { | |
220 | strcpy (pop_error, "Could not determine POP server"); | |
221 | return (0); | |
222 | } | |
223 | ||
224 | /* Determine the password */ | |
225 | #ifdef KERBEROS | |
226 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
227 | #else | |
228 | #define DONT_NEED_PASSWORD 0 | |
229 | #endif | |
230 | ||
231 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
232 | { | |
233 | if (! (flags & POP_NO_GETPASS)) | |
234 | { | |
235 | password = getpass ("Enter POP password:"); | |
236 | } | |
237 | if (! password) | |
238 | { | |
239 | strcpy (pop_error, "Could not determine POP password"); | |
240 | return (0); | |
241 | } | |
242 | } | |
243 | if (password) | |
244 | flags |= POP_NO_KERBEROS; | |
245 | else | |
246 | password = username; | |
247 | ||
248 | sock = socket_connection (host, flags); | |
249 | if (sock == -1) | |
250 | return (0); | |
251 | ||
252 | server = (popserver) malloc (sizeof (struct _popserver)); | |
253 | if (! server) | |
254 | { | |
255 | strcpy (pop_error, "Out of memory in pop_open"); | |
256 | return (0); | |
257 | } | |
258 | server->buffer = (char *) malloc (GETLINE_MIN); | |
259 | if (! server->buffer) | |
260 | { | |
261 | strcpy (pop_error, "Out of memory in pop_open"); | |
262 | free ((char *) server); | |
263 | return (0); | |
264 | } | |
265 | ||
266 | server->file = sock; | |
267 | server->data = 0; | |
268 | server->buffer_index = 0; | |
269 | server->buffer_size = GETLINE_MIN; | |
270 | server->in_multi = 0; | |
271 | ||
272 | if (getok (server)) | |
273 | return (0); | |
274 | ||
275 | /* | |
276 | * I really shouldn't use the pop_error variable like this, but.... | |
277 | */ | |
278 | if (strlen (username) > ERROR_MAX - 6) | |
279 | { | |
280 | pop_close (server); | |
281 | strcpy (pop_error, | |
282 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
283 | return (0); | |
284 | } | |
285 | sprintf (pop_error, "USER %s", username); | |
286 | ||
287 | if (sendline (server, pop_error) || getok (server)) | |
288 | { | |
289 | return (0); | |
290 | } | |
291 | ||
292 | if (strlen (password) > ERROR_MAX - 6) | |
293 | { | |
294 | pop_close (server); | |
295 | strcpy (pop_error, | |
296 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
297 | return (0); | |
298 | } | |
299 | sprintf (pop_error, "PASS %s", password); | |
300 | ||
301 | if (sendline (server, pop_error) || getok (server)) | |
302 | { | |
303 | return (0); | |
304 | } | |
305 | ||
306 | return (server); | |
307 | } | |
308 | ||
309 | /* | |
310 | * Function: pop_stat | |
311 | * | |
312 | * Purpose: Issue the STAT command to the server and return (in the | |
313 | * value parameters) the number of messages in the maildrop and | |
314 | * the total size of the maildrop. | |
315 | * | |
316 | * Return value: 0 on success, or non-zero with an error in pop_error | |
317 | * in failure. | |
318 | * | |
319 | * Side effects: On failure, may make further operations on the | |
320 | * connection impossible. | |
321 | */ | |
322 | int | |
323 | pop_stat (server, count, size) | |
324 | popserver server; | |
325 | int *count; | |
326 | int *size; | |
327 | { | |
328 | char *fromserver; | |
329 | ||
330 | if (server->in_multi) | |
331 | { | |
332 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
333 | return (-1); | |
334 | } | |
335 | ||
336 | if (sendline (server, "STAT") || (! (fromserver = getline (server)))) | |
337 | return (-1); | |
338 | ||
339 | if (strncmp (fromserver, "+OK ", 4)) | |
340 | { | |
341 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
342 | { | |
343 | strncpy (pop_error, fromserver, ERROR_MAX); | |
344 | } | |
345 | else | |
346 | { | |
347 | strcpy (pop_error, | |
348 | "Unexpected response from POP server in pop_stat"); | |
349 | pop_trash (server); | |
350 | } | |
351 | return (-1); | |
352 | } | |
353 | ||
354 | *count = atoi (&fromserver[4]); | |
355 | ||
356 | fromserver = index (&fromserver[4], ' '); | |
357 | if (! fromserver) | |
358 | { | |
359 | strcpy (pop_error, | |
360 | "Badly formatted response from server in pop_stat"); | |
361 | pop_trash (server); | |
362 | return (-1); | |
363 | } | |
364 | ||
365 | *size = atoi (fromserver + 1); | |
366 | ||
367 | return (0); | |
368 | } | |
369 | ||
370 | /* | |
371 | * Function: pop_list | |
372 | * | |
373 | * Purpose: Performs the POP "list" command and returns (in value | |
374 | * parameters) two malloc'd zero-terminated arrays -- one of | |
375 | * message IDs, and a parallel one of sizes. | |
376 | * | |
377 | * Arguments: | |
378 | * server The pop connection to talk to. | |
379 | * message The number of the one message about which to get | |
380 | * information, or 0 to get information about all | |
381 | * messages. | |
382 | * | |
383 | * Return value: 0 on success, non-zero with error in pop_error on | |
384 | * failure. | |
385 | * | |
386 | * Side effects: On failure, may make further operations on the | |
387 | * connection impossible. | |
388 | */ | |
389 | int | |
390 | pop_list (server, message, IDs, sizes) | |
391 | popserver server; | |
392 | int message; | |
393 | int **IDs; | |
394 | int **sizes; | |
395 | { | |
396 | int how_many, i; | |
397 | char *fromserver; | |
398 | ||
399 | if (server->in_multi) | |
400 | { | |
401 | strcpy (pop_error, "In multi-line query in pop_list"); | |
402 | return (-1); | |
403 | } | |
404 | ||
405 | if (message) | |
406 | how_many = 1; | |
407 | else | |
408 | { | |
409 | int count, size; | |
410 | if (pop_stat (server, &count, &size)) | |
411 | return (-1); | |
412 | how_many = count; | |
413 | } | |
414 | ||
415 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
416 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
417 | if (! (*IDs && *sizes)) | |
418 | { | |
419 | strcpy (pop_error, "Out of memory in pop_list"); | |
420 | return (-1); | |
421 | } | |
422 | ||
423 | if (message) | |
424 | { | |
425 | sprintf (pop_error, "LIST %d", message); | |
426 | if (sendline (server, pop_error)) | |
427 | { | |
428 | free ((char *) *IDs); | |
429 | free ((char *) *sizes); | |
430 | return (-1); | |
431 | } | |
432 | if (! (fromserver = getline (server))) | |
433 | { | |
434 | free ((char *) *IDs); | |
435 | free ((char *) *sizes); | |
436 | return (-1); | |
437 | } | |
438 | if (strncmp (fromserver, "+OK ", 4)) | |
439 | { | |
440 | if (! strncmp (fromserver, "-ERR", 4)) | |
441 | strncpy (pop_error, fromserver, ERROR_MAX); | |
442 | else | |
443 | { | |
444 | strcpy (pop_error, | |
445 | "Unexpected response from server in pop_list"); | |
446 | pop_trash (server); | |
447 | } | |
448 | free ((char *) *IDs); | |
449 | free ((char *) *sizes); | |
450 | return (-1); | |
451 | } | |
452 | (*IDs)[0] = atoi (&fromserver[4]); | |
453 | fromserver = index (&fromserver[4], ' '); | |
454 | if (! fromserver) | |
455 | { | |
456 | strcpy (pop_error, | |
457 | "Badly formatted response from server in pop_list"); | |
458 | pop_trash (server); | |
459 | free ((char *) *IDs); | |
460 | free ((char *) *sizes); | |
461 | return (-1); | |
462 | } | |
463 | (*sizes)[0] = atoi (fromserver); | |
464 | (*IDs)[1] = (*sizes)[1] = 0; | |
465 | return (0); | |
466 | } | |
467 | else | |
468 | { | |
469 | if (pop_multi_first (server, "LIST", &fromserver)) | |
470 | { | |
471 | free ((char *) *IDs); | |
472 | free ((char *) *sizes); | |
473 | return (-1); | |
474 | } | |
475 | for (i = 0; i < how_many; i++) | |
476 | { | |
477 | if (pop_multi_next (server, &fromserver)) | |
478 | { | |
479 | free ((char *) *IDs); | |
480 | free ((char *) *sizes); | |
481 | return (-1); | |
482 | } | |
483 | (*IDs)[i] = atoi (fromserver); | |
484 | fromserver = index (fromserver, ' '); | |
485 | if (! fromserver) | |
486 | { | |
487 | strcpy (pop_error, | |
488 | "Badly formatted response from server in pop_list"); | |
489 | free ((char *) *IDs); | |
490 | free ((char *) *sizes); | |
491 | pop_trash (server); | |
492 | return (-1); | |
493 | } | |
494 | (*sizes)[i] = atoi (fromserver); | |
495 | } | |
496 | if (pop_multi_next (server, &fromserver)) | |
497 | { | |
498 | free ((char *) *IDs); | |
499 | free ((char *) *sizes); | |
500 | return (-1); | |
501 | } | |
502 | else if (fromserver) | |
503 | { | |
504 | strcpy (pop_error, | |
505 | "Too many response lines from server in pop_list"); | |
506 | free ((char *) *IDs); | |
507 | free ((char *) *sizes); | |
508 | return (-1); | |
509 | } | |
510 | (*IDs)[i] = (*sizes)[i] = 0; | |
511 | return (0); | |
512 | } | |
513 | } | |
514 | ||
515 | /* | |
516 | * Function: pop_retrieve | |
517 | * | |
518 | * Purpose: Retrieve a specified message from the maildrop. | |
519 | * | |
520 | * Arguments: | |
521 | * server The server to retrieve from. | |
522 | * message The message number to retrieve. | |
523 | * markfrom | |
524 | * If true, then mark the string "From " at the beginning | |
525 | * of lines with '>'. | |
526 | * | |
527 | * Return value: A string pointing to the message, if successful, or | |
528 | * null with pop_error set if not. | |
529 | * | |
530 | * Side effects: May kill connection on error. | |
531 | */ | |
532 | char * | |
533 | pop_retrieve (server, message, markfrom) | |
534 | popserver server; | |
535 | int message; | |
536 | int markfrom; | |
537 | { | |
538 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
539 | char *ptr, *fromserver; | |
540 | int ret; | |
541 | ||
542 | if (server->in_multi) | |
543 | { | |
544 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
545 | return (0); | |
546 | } | |
547 | ||
548 | if (pop_list (server, message, &IDs, &sizes)) | |
549 | return (0); | |
550 | ||
551 | if (pop_retrieve_first (server, message, &fromserver)) | |
552 | { | |
553 | return (0); | |
554 | } | |
555 | ||
556 | /* | |
557 | * The "5" below is an arbitrary constant -- I assume that if | |
558 | * there are "From" lines in the text to be marked, there | |
559 | * probably won't be more than 5 of them. If there are, I | |
560 | * allocate more space for them below. | |
561 | */ | |
562 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
563 | ptr = malloc (bufsize); | |
564 | free ((char *) IDs); | |
565 | free ((char *) sizes); | |
566 | ||
567 | if (! ptr) | |
568 | { | |
569 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
570 | pop_retrieve_flush (server); | |
571 | return (0); | |
572 | } | |
573 | ||
574 | while (! (ret = pop_retrieve_next (server, &fromserver))) | |
575 | { | |
576 | int linesize; | |
577 | ||
578 | if (! fromserver) | |
579 | { | |
580 | ptr[cp] = '\0'; | |
581 | return (ptr); | |
582 | } | |
583 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
584 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
585 | fromserver[4] == ' ') | |
586 | { | |
587 | if (++fromcount == 5) | |
588 | { | |
589 | bufsize += 5; | |
590 | ptr = realloc (ptr, bufsize); | |
591 | if (! ptr) | |
592 | { | |
593 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
594 | pop_retrieve_flush (server); | |
595 | return (0); | |
596 | } | |
597 | fromcount = 0; | |
598 | } | |
599 | ptr[cp++] = '>'; | |
600 | } | |
601 | linesize = strlen (fromserver); | |
602 | bcopy (fromserver, &ptr[cp], linesize); | |
603 | cp += linesize; | |
604 | ptr[cp++] = '\n'; | |
605 | } | |
606 | ||
607 | if (ret) | |
608 | { | |
609 | free (ptr); | |
610 | return (0); | |
611 | } | |
612 | } | |
613 | ||
614 | int | |
615 | pop_retrieve_first (server, message, response) | |
616 | popserver server; | |
617 | int message; | |
618 | char **response; | |
619 | { | |
620 | sprintf (pop_error, "RETR %d", message); | |
621 | return (pop_multi_first (server, pop_error, response)); | |
622 | } | |
623 | ||
624 | int | |
625 | pop_retrieve_next (server, line) | |
626 | popserver server; | |
627 | char **line; | |
628 | { | |
629 | return (pop_multi_next (server, line)); | |
630 | } | |
631 | ||
632 | int | |
633 | pop_retrieve_flush (server) | |
634 | popserver server; | |
635 | { | |
636 | return (pop_multi_flush (server)); | |
637 | } | |
638 | ||
639 | int | |
640 | pop_top_first (server, message, lines, response) | |
641 | popserver server; | |
642 | int message, lines; | |
643 | char **response; | |
644 | { | |
645 | sprintf (pop_error, "TOP %d %d", message, lines); | |
646 | return (pop_multi_first (server, pop_error, response)); | |
647 | } | |
648 | ||
649 | int | |
650 | pop_top_next (server, line) | |
651 | popserver server; | |
652 | char **line; | |
653 | { | |
654 | return (pop_multi_next (server, line)); | |
655 | } | |
656 | ||
657 | int | |
658 | pop_top_flush (server) | |
659 | popserver server; | |
660 | { | |
661 | return (pop_multi_flush (server)); | |
662 | } | |
663 | ||
664 | int | |
665 | pop_multi_first (server, command, response) | |
666 | popserver server; | |
667 | char *command; | |
668 | char **response; | |
669 | { | |
670 | if (server->in_multi) | |
671 | { | |
672 | strcpy (pop_error, | |
673 | "Already in multi-line query in pop_multi_first"); | |
674 | return (-1); | |
675 | } | |
676 | ||
677 | if (sendline (server, command) || (! (*response = getline (server)))) | |
678 | { | |
679 | return (-1); | |
680 | } | |
681 | ||
682 | if (0 == strncmp (*response, "-ERR", 4)) | |
683 | { | |
684 | strncpy (pop_error, *response, ERROR_MAX); | |
685 | return (-1); | |
686 | } | |
687 | else if (0 == strncmp (*response, "+OK", 3)) | |
688 | { | |
689 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
690 | server->in_multi = 1; | |
691 | return (0); | |
692 | } | |
693 | else | |
694 | { | |
695 | strcpy (pop_error, | |
696 | "Unexpected response from server in pop_multi_first"); | |
697 | return (-1); | |
698 | } | |
699 | } | |
700 | ||
701 | int | |
702 | pop_multi_next (server, line) | |
703 | popserver server; | |
704 | char **line; | |
705 | { | |
706 | char *fromserver; | |
707 | ||
708 | if (! server->in_multi) | |
709 | { | |
710 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
711 | return (-1); | |
712 | } | |
713 | ||
714 | fromserver = getline (server); | |
715 | if (! fromserver) | |
716 | { | |
717 | return (-1); | |
718 | } | |
719 | ||
720 | if (fromserver[0] == '.') | |
721 | { | |
722 | if (! fromserver[1]) | |
723 | { | |
724 | *line = 0; | |
725 | server->in_multi = 0; | |
726 | return (0); | |
727 | } | |
728 | else | |
729 | { | |
730 | *line = fromserver + 1; | |
731 | return (0); | |
732 | } | |
733 | } | |
734 | else | |
735 | { | |
736 | *line = fromserver; | |
737 | return (0); | |
738 | } | |
739 | } | |
740 | ||
741 | int | |
742 | pop_multi_flush (server) | |
743 | popserver server; | |
744 | { | |
745 | char *line; | |
746 | ||
747 | if (! server->in_multi) | |
748 | { | |
749 | return (0); | |
750 | } | |
751 | ||
752 | while (! pop_multi_next (server, &line)) | |
753 | { | |
754 | if (! line) | |
755 | { | |
756 | return (0); | |
757 | } | |
758 | } | |
759 | ||
760 | return (-1); | |
761 | } | |
762 | ||
763 | /* Function: pop_delete | |
764 | * | |
765 | * Purpose: Delete a specified message. | |
766 | * | |
767 | * Arguments: | |
768 | * server Server from which to delete the message. | |
769 | * message Message to delete. | |
770 | * | |
771 | * Return value: 0 on success, non-zero with error in pop_error | |
772 | * otherwise. | |
773 | */ | |
774 | int | |
775 | pop_delete (server, message) | |
776 | popserver server; | |
777 | int message; | |
778 | { | |
779 | if (server->in_multi) | |
780 | { | |
781 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
782 | return (-1); | |
783 | } | |
784 | ||
785 | sprintf (pop_error, "DELE %d", message); | |
786 | ||
787 | if (sendline (server, pop_error) || getok (server)) | |
788 | return (-1); | |
789 | ||
790 | return (0); | |
791 | } | |
792 | ||
793 | /* | |
794 | * Function: pop_noop | |
795 | * | |
796 | * Purpose: Send a noop command to the server. | |
797 | * | |
798 | * Argument: | |
799 | * server The server to send to. | |
800 | * | |
801 | * Return value: 0 on success, non-zero with error in pop_error | |
802 | * otherwise. | |
803 | * | |
804 | * Side effects: Closes connection on error. | |
805 | */ | |
806 | int | |
807 | pop_noop (server) | |
808 | popserver server; | |
809 | { | |
810 | if (server->in_multi) | |
811 | { | |
812 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
813 | return (-1); | |
814 | } | |
815 | ||
816 | if (sendline (server, "NOOP") || getok (server)) | |
817 | return (-1); | |
818 | ||
819 | return (0); | |
820 | } | |
821 | ||
822 | /* | |
823 | * Function: pop_last | |
824 | * | |
825 | * Purpose: Find out the highest seen message from the server. | |
826 | * | |
827 | * Arguments: | |
828 | * server The server. | |
829 | * | |
830 | * Return value: If successful, the highest seen message, which is | |
831 | * greater than or equal to 0. Otherwise, a negative number with | |
832 | * the error explained in pop_error. | |
833 | * | |
834 | * Side effects: Closes the connection on error. | |
835 | */ | |
836 | int | |
837 | pop_last (server) | |
838 | popserver server; | |
839 | { | |
840 | char *fromserver; | |
841 | ||
842 | if (server->in_multi) | |
843 | { | |
844 | strcpy (pop_error, "In multi-line query in pop_last"); | |
845 | return (-1); | |
846 | } | |
847 | ||
848 | if (sendline (server, "LAST")) | |
849 | return (-1); | |
850 | ||
851 | if (! (fromserver = getline (server))) | |
852 | return (-1); | |
853 | ||
854 | if (! strncmp (fromserver, "-ERR", 4)) | |
855 | { | |
856 | strncpy (pop_error, fromserver, ERROR_MAX); | |
857 | return (-1); | |
858 | } | |
859 | else if (strncmp (fromserver, "+OK ", 4)) | |
860 | { | |
861 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
862 | pop_trash (server); | |
863 | return (-1); | |
864 | } | |
865 | else | |
866 | { | |
867 | return (atoi (&fromserver[4])); | |
868 | } | |
869 | } | |
870 | ||
871 | /* | |
872 | * Function: pop_reset | |
873 | * | |
874 | * Purpose: Reset the server to its initial connect state | |
875 | * | |
876 | * Arguments: | |
877 | * server The server. | |
878 | * | |
879 | * Return value: 0 for success, non-0 with error in pop_error | |
880 | * otherwise. | |
881 | * | |
882 | * Side effects: Closes the connection on error. | |
883 | */ | |
884 | int | |
885 | pop_reset (server) | |
886 | popserver server; | |
887 | { | |
888 | if (pop_retrieve_flush (server)) | |
889 | { | |
890 | return (-1); | |
891 | } | |
892 | ||
893 | if (sendline (server, "RSET") || getok (server)) | |
894 | return (-1); | |
895 | ||
896 | return (0); | |
897 | } | |
898 | ||
899 | /* | |
900 | * Function: pop_quit | |
901 | * | |
902 | * Purpose: Quit the connection to the server, | |
903 | * | |
904 | * Arguments: | |
905 | * server The server to quit. | |
906 | * | |
907 | * Return value: 0 for success, non-zero otherwise with error in | |
908 | * pop_error. | |
909 | * | |
8e6208c5 | 910 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
911 | * function is called, even if an error occurs. |
912 | */ | |
913 | int | |
914 | pop_quit (server) | |
915 | popserver server; | |
916 | { | |
917 | int ret = 0; | |
918 | ||
919 | if (server->file >= 0) | |
920 | { | |
921 | if (pop_retrieve_flush (server)) | |
922 | { | |
923 | ret = -1; | |
924 | } | |
925 | ||
926 | if (sendline (server, "QUIT") || getok (server)) | |
927 | { | |
928 | ret = -1; | |
929 | } | |
930 | ||
931 | close (server->file); | |
932 | } | |
933 | ||
934 | if (server->buffer) | |
935 | free (server->buffer); | |
936 | free ((char *) server); | |
937 | ||
938 | return (ret); | |
939 | } | |
940 | ||
941 | /* | |
942 | * Function: socket_connection | |
943 | * | |
944 | * Purpose: Opens the network connection with the mail host, without | |
945 | * doing any sort of I/O with it or anything. | |
946 | * | |
947 | * Arguments: | |
948 | * host The host to which to connect. | |
949 | * flags Option flags. | |
950 | * | |
951 | * Return value: A file descriptor indicating the connection, or -1 | |
952 | * indicating failure, in which case an error has been copied | |
953 | * into pop_error. | |
954 | */ | |
955 | static int | |
956 | socket_connection (host, flags) | |
957 | char *host; | |
958 | int flags; | |
959 | { | |
960 | struct hostent *hostent; | |
961 | struct servent *servent; | |
962 | struct sockaddr_in addr; | |
963 | char found_port = 0; | |
964 | char *service; | |
965 | int sock; | |
966 | #ifdef KERBEROS | |
967 | #ifdef KRB5 | |
968 | krb5_error_code rem; | |
969 | krb5_ccache ccdef; | |
970 | krb5_principal client, server; | |
971 | krb5_error *err_ret; | |
972 | register char *cp; | |
973 | #else | |
974 | KTEXT ticket; | |
975 | MSG_DAT msg_data; | |
976 | CREDENTIALS cred; | |
977 | Key_schedule schedule; | |
978 | int rem; | |
979 | #endif /* KRB5 */ | |
980 | #endif /* KERBEROS */ | |
981 | ||
982 | int try_count = 0; | |
983 | ||
984 | do | |
985 | { | |
986 | hostent = gethostbyname (host); | |
987 | try_count++; | |
988 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
989 | { | |
990 | strcpy (pop_error, "Could not determine POP server's address"); | |
991 | return (-1); | |
992 | } | |
993 | } while (! hostent); | |
994 | ||
995 | bzero ((char *) &addr, sizeof (addr)); | |
996 | addr.sin_family = AF_INET; | |
997 | ||
998 | #ifdef KERBEROS | |
999 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1000 | #else | |
1001 | service = POP_SERVICE; | |
1002 | #endif | |
1003 | ||
1004 | #ifdef HESIOD | |
1005 | if (! (flags & POP_NO_HESIOD)) | |
1006 | { | |
1007 | servent = hes_getservbyname (service, "tcp"); | |
1008 | if (servent) | |
1009 | { | |
1010 | addr.sin_port = servent->s_port; | |
1011 | found_port = 1; | |
1012 | } | |
1013 | } | |
1014 | #endif | |
1015 | if (! found_port) | |
1016 | { | |
1017 | servent = getservbyname (service, "tcp"); | |
1018 | if (servent) | |
1019 | { | |
1020 | addr.sin_port = servent->s_port; | |
1021 | } | |
1022 | else | |
1023 | { | |
1024 | #ifdef KERBEROS | |
1025 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1026 | POP_PORT : KPOP_PORT); | |
1027 | #else | |
1028 | addr.sin_port = htons (POP_PORT); | |
1029 | #endif | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | #define SOCKET_ERROR "Could not create socket for POP connection: " | |
1034 | ||
1035 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1036 | if (sock < 0) | |
1037 | { | |
1038 | strcpy (pop_error, SOCKET_ERROR); | |
1039 | strncat (pop_error, strerror (errno), | |
1040 | ERROR_MAX - sizeof (SOCKET_ERROR)); | |
1041 | return (-1); | |
1042 | ||
1043 | } | |
1044 | ||
1045 | while (*hostent->h_addr_list) | |
1046 | { | |
1047 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1048 | hostent->h_length); | |
1049 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1050 | break; | |
1051 | hostent->h_addr_list++; | |
1052 | } | |
1053 | ||
1054 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1055 | ||
1056 | if (! *hostent->h_addr_list) | |
1057 | { | |
1058 | (void) close (sock); | |
1059 | strcpy (pop_error, CONNECT_ERROR); | |
1060 | strncat (pop_error, strerror (errno), | |
1061 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1062 | return (-1); | |
1063 | ||
1064 | } | |
1065 | ||
1066 | #ifdef KERBEROS | |
1067 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1068 | if (! (flags & POP_NO_KERBEROS)) | |
1069 | { | |
1070 | #ifdef KRB5 | |
1071 | krb5_init_ets (); | |
1072 | ||
1073 | if (rem = krb5_cc_default (&ccdef)) | |
1074 | { | |
1075 | krb5error: | |
1076 | strcpy (pop_error, KRB_ERROR); | |
1077 | strncat (pop_error, error_message (rem), | |
1078 | ERROR_MAX - sizeof(KRB_ERROR)); | |
1079 | (void) close (sock); | |
1080 | return (-1); | |
1081 | } | |
1082 | ||
1083 | if (rem = krb5_cc_get_principal (ccdef, &client)) | |
1084 | { | |
1085 | goto krb5error; | |
1086 | } | |
1087 | ||
1088 | for (cp = hostent->h_name; *cp; cp++) | |
1089 | { | |
1090 | if (isupper (*cp)) | |
1091 | { | |
1092 | *cp = tolower (*cp); | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE, | |
1097 | FALSE, &server)) | |
1098 | { | |
1099 | goto krb5error; | |
1100 | } | |
1101 | ||
1102 | rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server, | |
1103 | AP_OPTS_MUTUAL_REQUIRED, | |
1104 | 0, /* no checksum */ | |
1105 | 0, /* no creds, use ccache instead */ | |
1106 | ccdef, | |
1107 | 0, /* don't need seq # */ | |
1108 | 0, /* don't need subsession key */ | |
1109 | &err_ret, | |
1110 | 0); /* don't need reply */ | |
1111 | krb5_free_principal (server); | |
1112 | if (rem) | |
1113 | { | |
1114 | if (err_ret && err_ret->text.length) | |
1115 | { | |
1116 | strcpy (pop_error, KRB_ERROR); | |
1117 | strncat (pop_error, error_message (rem), | |
1118 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1119 | strncat (pop_error, " [server says '", | |
1120 | ERROR_MAX - strlen (pop_error) - 1); | |
1121 | strncat (pop_error, err_ret->text.data, | |
1122 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1123 | err_ret->text.length)); | |
1124 | strncat (pop_error, "']", | |
1125 | ERROR_MAX - strlen (pop_error) - 1); | |
1126 | } | |
1127 | else | |
1128 | { | |
1129 | strcpy (pop_error, KRB_ERROR); | |
1130 | strncat (pop_error, error_message (rem), | |
1131 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1132 | } | |
1133 | if (err_ret) | |
1134 | krb5_free_error (err_ret); | |
1135 | ||
1136 | (void) close (sock); | |
1137 | return (-1); | |
1138 | } | |
1139 | #else /* ! KRB5 */ | |
1140 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); | |
1141 | rem = krb_sendauth (0L, sock, ticket, "pop", hostent->h_name, | |
1142 | (char *) krb_realmofhost (hostent->h_name), | |
1143 | (unsigned long) 0, &msg_data, &cred, schedule, | |
1144 | (struct sockaddr_in *) 0, | |
1145 | (struct sockaddr_in *) 0, | |
1146 | "KPOPV0.1"); | |
1147 | free ((char *) ticket); | |
1148 | if (rem != KSUCCESS) | |
1149 | { | |
1150 | strcpy (pop_error, KRB_ERROR); | |
1151 | strncat (pop_error, krb_err_txt[rem], | |
1152 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1153 | (void) close (sock); | |
1154 | return (-1); | |
1155 | } | |
1156 | #endif /* KRB5 */ | |
1157 | } | |
1158 | #endif /* KERBEROS */ | |
1159 | ||
1160 | return (sock); | |
1161 | } /* socket_connection */ | |
1162 | ||
1163 | /* | |
1164 | * Function: getline | |
1165 | * | |
1166 | * Purpose: Get a line of text from the connection and return a | |
1167 | * pointer to it. The carriage return and linefeed at the end of | |
1168 | * the line are stripped, but periods at the beginnings of lines | |
1169 | * are NOT dealt with in any special way. | |
1170 | * | |
1171 | * Arguments: | |
1172 | * server The server from which to get the line of text. | |
1173 | * | |
1174 | * Returns: A non-null pointer if successful, or a null pointer on any | |
1175 | * error, with an error message copied into pop_error. | |
1176 | * | |
1177 | * Notes: The line returned is overwritten with each call to getline. | |
1178 | * | |
1179 | * Side effects: Closes the connection on error. | |
1180 | */ | |
1181 | static char * | |
1182 | getline (server) | |
1183 | popserver server; | |
1184 | { | |
1185 | #define GETLINE_ERROR "Error reading from server: " | |
1186 | ||
1187 | int ret; | |
b6606ad8 RS |
1188 | int search_offset = 0; |
1189 | ||
9c0f2dac RS |
1190 | if (server->data) |
1191 | { | |
8148baf9 | 1192 | char *cp = find_crlf (server->buffer + server->buffer_index); |
9c0f2dac RS |
1193 | if (cp) |
1194 | { | |
1195 | int found; | |
1196 | int data_used; | |
1197 | ||
1198 | found = server->buffer_index; | |
1199 | data_used = (cp + 2) - server->buffer - found; | |
1200 | ||
1201 | *cp = '\0'; /* terminate the string to be returned */ | |
1202 | server->data -= data_used; | |
1203 | server->buffer_index += data_used; | |
1204 | ||
1205 | if (pop_debug) | |
1206 | fprintf (stderr, "<<< %s\n", server->buffer + found); | |
1207 | return (server->buffer + found); | |
1208 | } | |
1209 | else | |
1210 | { | |
1211 | bcopy (server->buffer + server->buffer_index, | |
1212 | server->buffer, server->data); | |
b6606ad8 RS |
1213 | /* Record the fact that we've searched the data already in |
1214 | the buffer for a CRLF, so that when we search below, we | |
1215 | don't have to search the same data twice. There's a "- | |
1216 | 1" here to account for the fact that the last character | |
1217 | of the data we have may be the CR of a CRLF pair, of | |
1218 | which we haven't read the second half yet, so we may have | |
1219 | to search it again when we read more data. */ | |
1220 | search_offset = server->data - 1; | |
9c0f2dac RS |
1221 | server->buffer_index = 0; |
1222 | } | |
1223 | } | |
1224 | else | |
1225 | { | |
1226 | server->buffer_index = 0; | |
1227 | } | |
1228 | ||
1229 | while (1) | |
1230 | { | |
b6606ad8 RS |
1231 | /* There's a "- 1" here to leave room for the null that we put |
1232 | at the end of the read data below. We put the null there so | |
1233 | that find_crlf knows where to stop when we call it. */ | |
1234 | if (server->data == server->buffer_size - 1) | |
9c0f2dac RS |
1235 | { |
1236 | server->buffer_size += GETLINE_INCR; | |
1237 | server->buffer = realloc (server->buffer, server->buffer_size); | |
1238 | if (! server->buffer) | |
1239 | { | |
1240 | strcpy (pop_error, "Out of memory in getline"); | |
1241 | pop_trash (server); | |
1242 | return (0); | |
1243 | } | |
1244 | } | |
1245 | ret = read (server->file, server->buffer + server->data, | |
7a481e50 | 1246 | server->buffer_size - server->data - 1); |
9c0f2dac RS |
1247 | if (ret < 0) |
1248 | { | |
1249 | strcpy (pop_error, GETLINE_ERROR); | |
1250 | strncat (pop_error, strerror (errno), | |
1251 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1252 | pop_trash (server); | |
1253 | return (0); | |
1254 | } | |
1255 | else if (ret == 0) | |
1256 | { | |
1257 | strcpy (pop_error, "Unexpected EOF from server in getline"); | |
1258 | pop_trash (server); | |
1259 | return (0); | |
1260 | } | |
1261 | else | |
1262 | { | |
7a481e50 | 1263 | char *cp; |
9c0f2dac | 1264 | server->data += ret; |
7a481e50 | 1265 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1266 | |
b6606ad8 | 1267 | cp = find_crlf (server->buffer + search_offset); |
9c0f2dac RS |
1268 | if (cp) |
1269 | { | |
1270 | int data_used = (cp + 2) - server->buffer; | |
1271 | *cp = '\0'; | |
1272 | server->data -= data_used; | |
1273 | server->buffer_index = data_used; | |
1274 | ||
1275 | if (pop_debug) | |
1276 | fprintf (stderr, "<<< %s\n", server->buffer); | |
1277 | return (server->buffer); | |
1278 | } | |
b6606ad8 | 1279 | search_offset += ret; |
9c0f2dac RS |
1280 | } |
1281 | } | |
1282 | ||
1283 | /* NOTREACHED */ | |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * Function: sendline | |
1288 | * | |
1289 | * Purpose: Sends a line of text to the POP server. The line of text | |
1290 | * passed into this function should NOT have the carriage return | |
1291 | * and linefeed on the end of it. Periods at beginnings of lines | |
1292 | * will NOT be treated specially by this function. | |
1293 | * | |
1294 | * Arguments: | |
1295 | * server The server to which to send the text. | |
1296 | * line The line of text to send. | |
1297 | * | |
1298 | * Return value: Upon successful completion, a value of 0 will be | |
1299 | * returned. Otherwise, a non-zero value will be returned, and | |
1300 | * an error will be copied into pop_error. | |
1301 | * | |
1302 | * Side effects: Closes the connection on error. | |
1303 | */ | |
1304 | static int | |
1305 | sendline (server, line) | |
1306 | popserver server; | |
1307 | char *line; | |
1308 | { | |
1309 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1310 | int ret; | |
1311 | ||
1312 | ret = fullwrite (server->file, line, strlen (line)); | |
1313 | if (ret >= 0) | |
1314 | { /* 0 indicates that a blank line was written */ | |
1315 | ret = fullwrite (server->file, "\r\n", 2); | |
1316 | } | |
1317 | ||
1318 | if (ret < 0) | |
1319 | { | |
1320 | pop_trash (server); | |
1321 | strcpy (pop_error, SENDLINE_ERROR); | |
1322 | strncat (pop_error, strerror (errno), | |
1323 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1324 | return (ret); | |
1325 | } | |
1326 | ||
1327 | if (pop_debug) | |
1328 | fprintf (stderr, ">>> %s\n", line); | |
1329 | ||
1330 | return (0); | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * Procedure: fullwrite | |
1335 | * | |
1336 | * Purpose: Just like write, but keeps trying until the entire string | |
1337 | * has been written. | |
1338 | * | |
1339 | * Return value: Same as write. Pop_error is not set. | |
1340 | */ | |
1341 | static int | |
1342 | fullwrite (fd, buf, nbytes) | |
1343 | int fd; | |
1344 | char *buf; | |
1345 | int nbytes; | |
1346 | { | |
1347 | char *cp; | |
1348 | int ret; | |
1349 | ||
1350 | cp = buf; | |
1351 | while ((ret = write (fd, cp, nbytes)) > 0) | |
1352 | { | |
1353 | cp += ret; | |
1354 | nbytes -= ret; | |
1355 | } | |
1356 | ||
1357 | return (ret); | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * Procedure getok | |
1362 | * | |
1363 | * Purpose: Reads a line from the server. If the return indicator is | |
1364 | * positive, return with a zero exit status. If not, return with | |
1365 | * a negative exit status. | |
1366 | * | |
1367 | * Arguments: | |
1368 | * server The server to read from. | |
1369 | * | |
1370 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1371 | * | |
8e6208c5 | 1372 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1373 | */ |
1374 | static int | |
1375 | getok (server) | |
1376 | popserver server; | |
1377 | { | |
1378 | char *fromline; | |
1379 | ||
1380 | if (! (fromline = getline (server))) | |
1381 | { | |
1382 | return (-1); | |
1383 | } | |
1384 | ||
1385 | if (! strncmp (fromline, "+OK", 3)) | |
1386 | return (0); | |
1387 | else if (! strncmp (fromline, "-ERR", 4)) | |
1388 | { | |
1389 | strncpy (pop_error, fromline, ERROR_MAX); | |
1390 | pop_error[ERROR_MAX-1] = '\0'; | |
1391 | return (-1); | |
1392 | } | |
1393 | else | |
1394 | { | |
1395 | strcpy (pop_error, | |
1396 | "Unexpected response from server; expecting +OK or -ERR"); | |
1397 | pop_trash (server); | |
1398 | return (-1); | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | #if 0 | |
1403 | /* | |
1404 | * Function: gettermination | |
1405 | * | |
1406 | * Purpose: Gets the next line and verifies that it is a termination | |
1407 | * line (nothing but a dot). | |
1408 | * | |
1409 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1410 | * | |
1411 | * Side effects: Closes the connection on error. | |
1412 | */ | |
1413 | static int | |
1414 | gettermination (server) | |
1415 | popserver server; | |
1416 | { | |
1417 | char *fromserver; | |
1418 | ||
1419 | fromserver = getline (server); | |
1420 | if (! fromserver) | |
1421 | return (-1); | |
1422 | ||
1423 | if (strcmp (fromserver, ".")) | |
1424 | { | |
1425 | strcpy (pop_error, | |
1426 | "Unexpected response from server in gettermination"); | |
1427 | pop_trash (server); | |
1428 | return (-1); | |
1429 | } | |
1430 | ||
1431 | return (0); | |
1432 | } | |
1433 | #endif | |
1434 | ||
1435 | /* | |
1436 | * Function pop_close | |
1437 | * | |
1438 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1439 | * preserve any changes that were made and a "QUIT" command to | |
1440 | * try to get the server to quit, but ignoring any responses that | |
1441 | * are received. | |
1442 | * | |
8e6208c5 | 1443 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1444 | * Changes made to the maildrop since the session was started (or |
1445 | * since the last pop_reset) may be lost. | |
1446 | */ | |
1447 | void | |
1448 | pop_close (server) | |
1449 | popserver server; | |
1450 | { | |
1451 | pop_trash (server); | |
1452 | free ((char *) server); | |
1453 | ||
1454 | return; | |
1455 | } | |
1456 | ||
1457 | /* | |
1458 | * Function: pop_trash | |
1459 | * | |
1460 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1461 | * memory associated with the server. It is legal to call | |
1462 | * pop_close or pop_quit after this function has been called. | |
1463 | */ | |
1464 | static void | |
1465 | pop_trash (server) | |
1466 | popserver server; | |
1467 | { | |
1468 | if (server->file >= 0) | |
1469 | { | |
1470 | sendline (server, "RSET"); | |
1471 | sendline (server, "QUIT"); | |
1472 | ||
1473 | close (server->file); | |
1474 | server->file = -1; | |
1475 | if (server->buffer) | |
1476 | { | |
1477 | free (server->buffer); | |
1478 | server->buffer = 0; | |
1479 | } | |
1480 | } | |
1481 | } | |
1482 | ||
8148baf9 RS |
1483 | /* Return a pointer to the first CRLF in IN_STRING, |
1484 | or 0 if it does not contain one. */ | |
9c0f2dac RS |
1485 | |
1486 | static char * | |
8148baf9 RS |
1487 | find_crlf (in_string) |
1488 | char *in_string; | |
9c0f2dac | 1489 | { |
8148baf9 | 1490 | while (1) |
9c0f2dac | 1491 | { |
8148baf9 RS |
1492 | if (! *in_string) |
1493 | return (0); | |
1494 | else if (*in_string == '\r') | |
1495 | { | |
1496 | if (*++in_string == '\n') | |
1497 | return (in_string - 1); | |
1498 | } | |
1499 | else | |
1500 | in_string++; | |
9c0f2dac | 1501 | } |
8148baf9 | 1502 | /* NOTREACHED */ |
9c0f2dac RS |
1503 | } |
1504 | ||
1505 | #endif /* MAIL_USE_POP */ |