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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 */); | |
7d665945 | 79 | extern char *index (); |
8148baf9 RS |
80 | |
81 | #ifdef KERBEROS | |
82 | #ifndef KRB5 | |
9c0f2dac | 83 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
84 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
85 | struct sockaddr_in *, struct sockaddr_in *, | |
86 | char * */); | |
9c0f2dac | 87 | extern char *krb_realmofhost (/* char * */); |
8148baf9 RS |
88 | #endif /* ! KRB5 */ |
89 | #endif /* KERBEROS */ | |
9c0f2dac | 90 | |
8148baf9 | 91 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
92 | extern int h_errno; |
93 | #endif | |
94 | ||
95 | static int socket_connection (/* char *, int */); | |
96 | static char *getline (/* popserver */); | |
97 | static int sendline (/* popserver, char * */); | |
98 | static int fullwrite (/* int, char *, int */); | |
99 | static int getok (/* popserver */); | |
100 | #if 0 | |
101 | static int gettermination (/* popserver */); | |
102 | #endif | |
103 | static void pop_trash (/* popserver */); | |
8148baf9 | 104 | static char *find_crlf (/* char * */); |
7a481e50 | 105 | |
9c0f2dac RS |
106 | #define ERROR_MAX 80 /* a pretty arbitrary size */ |
107 | #define POP_PORT 110 | |
108 | #define KPOP_PORT 1109 | |
109 | #define POP_SERVICE "pop" | |
110 | #ifdef KERBEROS | |
111 | #ifdef KRB5 | |
112 | #define KPOP_SERVICE "k5pop"; | |
113 | #else | |
114 | #define KPOP_SERVICE "kpop" | |
115 | #endif | |
116 | #endif | |
117 | ||
118 | char pop_error[ERROR_MAX]; | |
119 | int pop_debug = 0; | |
120 | ||
121 | #ifndef min | |
122 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
123 | #endif | |
124 | ||
125 | /* | |
126 | * Function: pop_open (char *host, char *username, char *password, | |
127 | * int flags) | |
128 | * | |
129 | * Purpose: Establishes a connection with a post-office server, and | |
130 | * completes the authorization portion of the session. | |
131 | * | |
132 | * Arguments: | |
133 | * host The server host with which the connection should be | |
134 | * established. Optional. If omitted, internal | |
135 | * heuristics will be used to determine the server host, | |
136 | * if possible. | |
137 | * username | |
138 | * The username of the mail-drop to access. Optional. | |
139 | * If omitted, internal heuristics will be used to | |
140 | * determine the username, if possible. | |
141 | * password | |
142 | * The password to use for authorization. If omitted, | |
143 | * internal heuristics will be used to determine the | |
144 | * password, if possible. | |
145 | * flags A bit mask containing flags controlling certain | |
146 | * functions of the routine. Valid flags are defined in | |
147 | * the file pop.h | |
148 | * | |
149 | * Return value: Upon successful establishment of a connection, a | |
150 | * non-null popserver will be returned. Otherwise, null will be | |
151 | * returned, and the string variable pop_error will contain an | |
152 | * explanation of the error. | |
153 | */ | |
154 | popserver | |
155 | pop_open (host, username, password, flags) | |
156 | char *host; | |
157 | char *username; | |
158 | char *password; | |
159 | int flags; | |
160 | { | |
161 | int sock; | |
162 | popserver server; | |
163 | ||
164 | /* Determine the user name */ | |
165 | if (! username) | |
166 | { | |
167 | username = getenv ("USER"); | |
168 | if (! (username && *username)) | |
169 | { | |
170 | username = getlogin (); | |
171 | if (! (username && *username)) | |
172 | { | |
173 | struct passwd *passwd; | |
174 | passwd = getpwuid (getuid ()); | |
175 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
176 | { | |
177 | username = passwd->pw_name; | |
178 | } | |
179 | else | |
180 | { | |
181 | strcpy (pop_error, "Could not determine username"); | |
182 | return (0); | |
183 | } | |
184 | } | |
185 | } | |
186 | } | |
187 | ||
188 | /* | |
189 | * Determine the mail host. | |
190 | */ | |
191 | ||
192 | if (! host) | |
193 | { | |
194 | host = getenv ("MAILHOST"); | |
195 | } | |
196 | ||
197 | #ifdef HESIOD | |
198 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
199 | { | |
200 | struct hes_postoffice *office; | |
201 | office = hes_getmailhost (username); | |
202 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
203 | && office->po_name && *office->po_name && office->po_host | |
204 | && *office->po_host) | |
205 | { | |
206 | host = office->po_host; | |
207 | username = office->po_name; | |
208 | } | |
209 | } | |
210 | #endif | |
211 | ||
212 | #ifdef MAILHOST | |
213 | if (! host) | |
214 | { | |
215 | host = MAILHOST; | |
216 | } | |
217 | #endif | |
218 | ||
219 | if (! host) | |
220 | { | |
221 | strcpy (pop_error, "Could not determine POP server"); | |
222 | return (0); | |
223 | } | |
224 | ||
225 | /* Determine the password */ | |
226 | #ifdef KERBEROS | |
227 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
228 | #else | |
229 | #define DONT_NEED_PASSWORD 0 | |
230 | #endif | |
231 | ||
232 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
233 | { | |
234 | if (! (flags & POP_NO_GETPASS)) | |
235 | { | |
236 | password = getpass ("Enter POP password:"); | |
237 | } | |
238 | if (! password) | |
239 | { | |
240 | strcpy (pop_error, "Could not determine POP password"); | |
241 | return (0); | |
242 | } | |
243 | } | |
244 | if (password) | |
245 | flags |= POP_NO_KERBEROS; | |
246 | else | |
247 | password = username; | |
248 | ||
249 | sock = socket_connection (host, flags); | |
250 | if (sock == -1) | |
251 | return (0); | |
252 | ||
253 | server = (popserver) malloc (sizeof (struct _popserver)); | |
254 | if (! server) | |
255 | { | |
256 | strcpy (pop_error, "Out of memory in pop_open"); | |
257 | return (0); | |
258 | } | |
259 | server->buffer = (char *) malloc (GETLINE_MIN); | |
260 | if (! server->buffer) | |
261 | { | |
262 | strcpy (pop_error, "Out of memory in pop_open"); | |
263 | free ((char *) server); | |
264 | return (0); | |
265 | } | |
266 | ||
267 | server->file = sock; | |
268 | server->data = 0; | |
269 | server->buffer_index = 0; | |
270 | server->buffer_size = GETLINE_MIN; | |
271 | server->in_multi = 0; | |
272 | ||
273 | if (getok (server)) | |
274 | return (0); | |
275 | ||
276 | /* | |
277 | * I really shouldn't use the pop_error variable like this, but.... | |
278 | */ | |
279 | if (strlen (username) > ERROR_MAX - 6) | |
280 | { | |
281 | pop_close (server); | |
282 | strcpy (pop_error, | |
283 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
284 | return (0); | |
285 | } | |
286 | sprintf (pop_error, "USER %s", username); | |
287 | ||
288 | if (sendline (server, pop_error) || getok (server)) | |
289 | { | |
290 | return (0); | |
291 | } | |
292 | ||
293 | if (strlen (password) > ERROR_MAX - 6) | |
294 | { | |
295 | pop_close (server); | |
296 | strcpy (pop_error, | |
297 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
298 | return (0); | |
299 | } | |
300 | sprintf (pop_error, "PASS %s", password); | |
301 | ||
302 | if (sendline (server, pop_error) || getok (server)) | |
303 | { | |
304 | return (0); | |
305 | } | |
306 | ||
307 | return (server); | |
308 | } | |
309 | ||
310 | /* | |
311 | * Function: pop_stat | |
312 | * | |
313 | * Purpose: Issue the STAT command to the server and return (in the | |
314 | * value parameters) the number of messages in the maildrop and | |
315 | * the total size of the maildrop. | |
316 | * | |
317 | * Return value: 0 on success, or non-zero with an error in pop_error | |
318 | * in failure. | |
319 | * | |
320 | * Side effects: On failure, may make further operations on the | |
321 | * connection impossible. | |
322 | */ | |
323 | int | |
324 | pop_stat (server, count, size) | |
325 | popserver server; | |
326 | int *count; | |
327 | int *size; | |
328 | { | |
329 | char *fromserver; | |
330 | ||
331 | if (server->in_multi) | |
332 | { | |
333 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
334 | return (-1); | |
335 | } | |
336 | ||
337 | if (sendline (server, "STAT") || (! (fromserver = getline (server)))) | |
338 | return (-1); | |
339 | ||
340 | if (strncmp (fromserver, "+OK ", 4)) | |
341 | { | |
342 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
343 | { | |
344 | strncpy (pop_error, fromserver, ERROR_MAX); | |
345 | } | |
346 | else | |
347 | { | |
348 | strcpy (pop_error, | |
349 | "Unexpected response from POP server in pop_stat"); | |
350 | pop_trash (server); | |
351 | } | |
352 | return (-1); | |
353 | } | |
354 | ||
355 | *count = atoi (&fromserver[4]); | |
356 | ||
357 | fromserver = index (&fromserver[4], ' '); | |
358 | if (! fromserver) | |
359 | { | |
360 | strcpy (pop_error, | |
361 | "Badly formatted response from server in pop_stat"); | |
362 | pop_trash (server); | |
363 | return (-1); | |
364 | } | |
365 | ||
366 | *size = atoi (fromserver + 1); | |
367 | ||
368 | return (0); | |
369 | } | |
370 | ||
371 | /* | |
372 | * Function: pop_list | |
373 | * | |
374 | * Purpose: Performs the POP "list" command and returns (in value | |
375 | * parameters) two malloc'd zero-terminated arrays -- one of | |
376 | * message IDs, and a parallel one of sizes. | |
377 | * | |
378 | * Arguments: | |
379 | * server The pop connection to talk to. | |
380 | * message The number of the one message about which to get | |
381 | * information, or 0 to get information about all | |
382 | * messages. | |
383 | * | |
384 | * Return value: 0 on success, non-zero with error in pop_error on | |
385 | * failure. | |
386 | * | |
387 | * Side effects: On failure, may make further operations on the | |
388 | * connection impossible. | |
389 | */ | |
390 | int | |
391 | pop_list (server, message, IDs, sizes) | |
392 | popserver server; | |
393 | int message; | |
394 | int **IDs; | |
395 | int **sizes; | |
396 | { | |
397 | int how_many, i; | |
398 | char *fromserver; | |
399 | ||
400 | if (server->in_multi) | |
401 | { | |
402 | strcpy (pop_error, "In multi-line query in pop_list"); | |
403 | return (-1); | |
404 | } | |
405 | ||
406 | if (message) | |
407 | how_many = 1; | |
408 | else | |
409 | { | |
410 | int count, size; | |
411 | if (pop_stat (server, &count, &size)) | |
412 | return (-1); | |
413 | how_many = count; | |
414 | } | |
415 | ||
416 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
417 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
418 | if (! (*IDs && *sizes)) | |
419 | { | |
420 | strcpy (pop_error, "Out of memory in pop_list"); | |
421 | return (-1); | |
422 | } | |
423 | ||
424 | if (message) | |
425 | { | |
426 | sprintf (pop_error, "LIST %d", message); | |
427 | if (sendline (server, pop_error)) | |
428 | { | |
429 | free ((char *) *IDs); | |
430 | free ((char *) *sizes); | |
431 | return (-1); | |
432 | } | |
433 | if (! (fromserver = getline (server))) | |
434 | { | |
435 | free ((char *) *IDs); | |
436 | free ((char *) *sizes); | |
437 | return (-1); | |
438 | } | |
439 | if (strncmp (fromserver, "+OK ", 4)) | |
440 | { | |
441 | if (! strncmp (fromserver, "-ERR", 4)) | |
442 | strncpy (pop_error, fromserver, ERROR_MAX); | |
443 | else | |
444 | { | |
445 | strcpy (pop_error, | |
446 | "Unexpected response from server in pop_list"); | |
447 | pop_trash (server); | |
448 | } | |
449 | free ((char *) *IDs); | |
450 | free ((char *) *sizes); | |
451 | return (-1); | |
452 | } | |
453 | (*IDs)[0] = atoi (&fromserver[4]); | |
454 | fromserver = index (&fromserver[4], ' '); | |
455 | if (! fromserver) | |
456 | { | |
457 | strcpy (pop_error, | |
458 | "Badly formatted response from server in pop_list"); | |
459 | pop_trash (server); | |
460 | free ((char *) *IDs); | |
461 | free ((char *) *sizes); | |
462 | return (-1); | |
463 | } | |
464 | (*sizes)[0] = atoi (fromserver); | |
465 | (*IDs)[1] = (*sizes)[1] = 0; | |
466 | return (0); | |
467 | } | |
468 | else | |
469 | { | |
470 | if (pop_multi_first (server, "LIST", &fromserver)) | |
471 | { | |
472 | free ((char *) *IDs); | |
473 | free ((char *) *sizes); | |
474 | return (-1); | |
475 | } | |
476 | for (i = 0; i < how_many; i++) | |
477 | { | |
478 | if (pop_multi_next (server, &fromserver)) | |
479 | { | |
480 | free ((char *) *IDs); | |
481 | free ((char *) *sizes); | |
482 | return (-1); | |
483 | } | |
484 | (*IDs)[i] = atoi (fromserver); | |
485 | fromserver = index (fromserver, ' '); | |
486 | if (! fromserver) | |
487 | { | |
488 | strcpy (pop_error, | |
489 | "Badly formatted response from server in pop_list"); | |
490 | free ((char *) *IDs); | |
491 | free ((char *) *sizes); | |
492 | pop_trash (server); | |
493 | return (-1); | |
494 | } | |
495 | (*sizes)[i] = atoi (fromserver); | |
496 | } | |
497 | if (pop_multi_next (server, &fromserver)) | |
498 | { | |
499 | free ((char *) *IDs); | |
500 | free ((char *) *sizes); | |
501 | return (-1); | |
502 | } | |
503 | else if (fromserver) | |
504 | { | |
505 | strcpy (pop_error, | |
506 | "Too many response lines from server in pop_list"); | |
507 | free ((char *) *IDs); | |
508 | free ((char *) *sizes); | |
509 | return (-1); | |
510 | } | |
511 | (*IDs)[i] = (*sizes)[i] = 0; | |
512 | return (0); | |
513 | } | |
514 | } | |
515 | ||
516 | /* | |
517 | * Function: pop_retrieve | |
518 | * | |
519 | * Purpose: Retrieve a specified message from the maildrop. | |
520 | * | |
521 | * Arguments: | |
522 | * server The server to retrieve from. | |
523 | * message The message number to retrieve. | |
524 | * markfrom | |
525 | * If true, then mark the string "From " at the beginning | |
526 | * of lines with '>'. | |
527 | * | |
528 | * Return value: A string pointing to the message, if successful, or | |
529 | * null with pop_error set if not. | |
530 | * | |
531 | * Side effects: May kill connection on error. | |
532 | */ | |
533 | char * | |
534 | pop_retrieve (server, message, markfrom) | |
535 | popserver server; | |
536 | int message; | |
537 | int markfrom; | |
538 | { | |
539 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
540 | char *ptr, *fromserver; | |
541 | int ret; | |
542 | ||
543 | if (server->in_multi) | |
544 | { | |
545 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
546 | return (0); | |
547 | } | |
548 | ||
549 | if (pop_list (server, message, &IDs, &sizes)) | |
550 | return (0); | |
551 | ||
552 | if (pop_retrieve_first (server, message, &fromserver)) | |
553 | { | |
554 | return (0); | |
555 | } | |
556 | ||
557 | /* | |
558 | * The "5" below is an arbitrary constant -- I assume that if | |
559 | * there are "From" lines in the text to be marked, there | |
560 | * probably won't be more than 5 of them. If there are, I | |
561 | * allocate more space for them below. | |
562 | */ | |
563 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 564 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
565 | free ((char *) IDs); |
566 | free ((char *) sizes); | |
567 | ||
568 | if (! ptr) | |
569 | { | |
570 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
571 | pop_retrieve_flush (server); | |
572 | return (0); | |
573 | } | |
574 | ||
575 | while (! (ret = pop_retrieve_next (server, &fromserver))) | |
576 | { | |
577 | int linesize; | |
578 | ||
579 | if (! fromserver) | |
580 | { | |
581 | ptr[cp] = '\0'; | |
582 | return (ptr); | |
583 | } | |
584 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
585 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
586 | fromserver[4] == ' ') | |
587 | { | |
588 | if (++fromcount == 5) | |
589 | { | |
590 | bufsize += 5; | |
7d665945 | 591 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
592 | if (! ptr) |
593 | { | |
594 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
595 | pop_retrieve_flush (server); | |
596 | return (0); | |
597 | } | |
598 | fromcount = 0; | |
599 | } | |
600 | ptr[cp++] = '>'; | |
601 | } | |
602 | linesize = strlen (fromserver); | |
603 | bcopy (fromserver, &ptr[cp], linesize); | |
604 | cp += linesize; | |
605 | ptr[cp++] = '\n'; | |
606 | } | |
607 | ||
608 | if (ret) | |
609 | { | |
610 | free (ptr); | |
611 | return (0); | |
612 | } | |
613 | } | |
614 | ||
615 | int | |
616 | pop_retrieve_first (server, message, response) | |
617 | popserver server; | |
618 | int message; | |
619 | char **response; | |
620 | { | |
621 | sprintf (pop_error, "RETR %d", message); | |
622 | return (pop_multi_first (server, pop_error, response)); | |
623 | } | |
624 | ||
625 | int | |
626 | pop_retrieve_next (server, line) | |
627 | popserver server; | |
628 | char **line; | |
629 | { | |
630 | return (pop_multi_next (server, line)); | |
631 | } | |
632 | ||
633 | int | |
634 | pop_retrieve_flush (server) | |
635 | popserver server; | |
636 | { | |
637 | return (pop_multi_flush (server)); | |
638 | } | |
639 | ||
640 | int | |
641 | pop_top_first (server, message, lines, response) | |
642 | popserver server; | |
643 | int message, lines; | |
644 | char **response; | |
645 | { | |
646 | sprintf (pop_error, "TOP %d %d", message, lines); | |
647 | return (pop_multi_first (server, pop_error, response)); | |
648 | } | |
649 | ||
650 | int | |
651 | pop_top_next (server, line) | |
652 | popserver server; | |
653 | char **line; | |
654 | { | |
655 | return (pop_multi_next (server, line)); | |
656 | } | |
657 | ||
658 | int | |
659 | pop_top_flush (server) | |
660 | popserver server; | |
661 | { | |
662 | return (pop_multi_flush (server)); | |
663 | } | |
664 | ||
665 | int | |
666 | pop_multi_first (server, command, response) | |
667 | popserver server; | |
668 | char *command; | |
669 | char **response; | |
670 | { | |
671 | if (server->in_multi) | |
672 | { | |
673 | strcpy (pop_error, | |
674 | "Already in multi-line query in pop_multi_first"); | |
675 | return (-1); | |
676 | } | |
677 | ||
678 | if (sendline (server, command) || (! (*response = getline (server)))) | |
679 | { | |
680 | return (-1); | |
681 | } | |
682 | ||
683 | if (0 == strncmp (*response, "-ERR", 4)) | |
684 | { | |
685 | strncpy (pop_error, *response, ERROR_MAX); | |
686 | return (-1); | |
687 | } | |
688 | else if (0 == strncmp (*response, "+OK", 3)) | |
689 | { | |
690 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
691 | server->in_multi = 1; | |
692 | return (0); | |
693 | } | |
694 | else | |
695 | { | |
696 | strcpy (pop_error, | |
697 | "Unexpected response from server in pop_multi_first"); | |
698 | return (-1); | |
699 | } | |
700 | } | |
701 | ||
702 | int | |
703 | pop_multi_next (server, line) | |
704 | popserver server; | |
705 | char **line; | |
706 | { | |
707 | char *fromserver; | |
708 | ||
709 | if (! server->in_multi) | |
710 | { | |
711 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
712 | return (-1); | |
713 | } | |
714 | ||
715 | fromserver = getline (server); | |
716 | if (! fromserver) | |
717 | { | |
718 | return (-1); | |
719 | } | |
720 | ||
721 | if (fromserver[0] == '.') | |
722 | { | |
723 | if (! fromserver[1]) | |
724 | { | |
725 | *line = 0; | |
726 | server->in_multi = 0; | |
727 | return (0); | |
728 | } | |
729 | else | |
730 | { | |
731 | *line = fromserver + 1; | |
732 | return (0); | |
733 | } | |
734 | } | |
735 | else | |
736 | { | |
737 | *line = fromserver; | |
738 | return (0); | |
739 | } | |
740 | } | |
741 | ||
742 | int | |
743 | pop_multi_flush (server) | |
744 | popserver server; | |
745 | { | |
746 | char *line; | |
747 | ||
748 | if (! server->in_multi) | |
749 | { | |
750 | return (0); | |
751 | } | |
752 | ||
753 | while (! pop_multi_next (server, &line)) | |
754 | { | |
755 | if (! line) | |
756 | { | |
757 | return (0); | |
758 | } | |
759 | } | |
760 | ||
761 | return (-1); | |
762 | } | |
763 | ||
764 | /* Function: pop_delete | |
765 | * | |
766 | * Purpose: Delete a specified message. | |
767 | * | |
768 | * Arguments: | |
769 | * server Server from which to delete the message. | |
770 | * message Message to delete. | |
771 | * | |
772 | * Return value: 0 on success, non-zero with error in pop_error | |
773 | * otherwise. | |
774 | */ | |
775 | int | |
776 | pop_delete (server, message) | |
777 | popserver server; | |
778 | int message; | |
779 | { | |
780 | if (server->in_multi) | |
781 | { | |
782 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
783 | return (-1); | |
784 | } | |
785 | ||
786 | sprintf (pop_error, "DELE %d", message); | |
787 | ||
788 | if (sendline (server, pop_error) || getok (server)) | |
789 | return (-1); | |
790 | ||
791 | return (0); | |
792 | } | |
793 | ||
794 | /* | |
795 | * Function: pop_noop | |
796 | * | |
797 | * Purpose: Send a noop command to the server. | |
798 | * | |
799 | * Argument: | |
800 | * server The server to send to. | |
801 | * | |
802 | * Return value: 0 on success, non-zero with error in pop_error | |
803 | * otherwise. | |
804 | * | |
805 | * Side effects: Closes connection on error. | |
806 | */ | |
807 | int | |
808 | pop_noop (server) | |
809 | popserver server; | |
810 | { | |
811 | if (server->in_multi) | |
812 | { | |
813 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
814 | return (-1); | |
815 | } | |
816 | ||
817 | if (sendline (server, "NOOP") || getok (server)) | |
818 | return (-1); | |
819 | ||
820 | return (0); | |
821 | } | |
822 | ||
823 | /* | |
824 | * Function: pop_last | |
825 | * | |
826 | * Purpose: Find out the highest seen message from the server. | |
827 | * | |
828 | * Arguments: | |
829 | * server The server. | |
830 | * | |
831 | * Return value: If successful, the highest seen message, which is | |
832 | * greater than or equal to 0. Otherwise, a negative number with | |
833 | * the error explained in pop_error. | |
834 | * | |
835 | * Side effects: Closes the connection on error. | |
836 | */ | |
837 | int | |
838 | pop_last (server) | |
839 | popserver server; | |
840 | { | |
841 | char *fromserver; | |
842 | ||
843 | if (server->in_multi) | |
844 | { | |
845 | strcpy (pop_error, "In multi-line query in pop_last"); | |
846 | return (-1); | |
847 | } | |
848 | ||
849 | if (sendline (server, "LAST")) | |
850 | return (-1); | |
851 | ||
852 | if (! (fromserver = getline (server))) | |
853 | return (-1); | |
854 | ||
855 | if (! strncmp (fromserver, "-ERR", 4)) | |
856 | { | |
857 | strncpy (pop_error, fromserver, ERROR_MAX); | |
858 | return (-1); | |
859 | } | |
860 | else if (strncmp (fromserver, "+OK ", 4)) | |
861 | { | |
862 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
863 | pop_trash (server); | |
864 | return (-1); | |
865 | } | |
866 | else | |
867 | { | |
868 | return (atoi (&fromserver[4])); | |
869 | } | |
870 | } | |
871 | ||
872 | /* | |
873 | * Function: pop_reset | |
874 | * | |
875 | * Purpose: Reset the server to its initial connect state | |
876 | * | |
877 | * Arguments: | |
878 | * server The server. | |
879 | * | |
880 | * Return value: 0 for success, non-0 with error in pop_error | |
881 | * otherwise. | |
882 | * | |
883 | * Side effects: Closes the connection on error. | |
884 | */ | |
885 | int | |
886 | pop_reset (server) | |
887 | popserver server; | |
888 | { | |
889 | if (pop_retrieve_flush (server)) | |
890 | { | |
891 | return (-1); | |
892 | } | |
893 | ||
894 | if (sendline (server, "RSET") || getok (server)) | |
895 | return (-1); | |
896 | ||
897 | return (0); | |
898 | } | |
899 | ||
900 | /* | |
901 | * Function: pop_quit | |
902 | * | |
903 | * Purpose: Quit the connection to the server, | |
904 | * | |
905 | * Arguments: | |
906 | * server The server to quit. | |
907 | * | |
908 | * Return value: 0 for success, non-zero otherwise with error in | |
909 | * pop_error. | |
910 | * | |
8e6208c5 | 911 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
912 | * function is called, even if an error occurs. |
913 | */ | |
914 | int | |
915 | pop_quit (server) | |
916 | popserver server; | |
917 | { | |
918 | int ret = 0; | |
919 | ||
920 | if (server->file >= 0) | |
921 | { | |
922 | if (pop_retrieve_flush (server)) | |
923 | { | |
924 | ret = -1; | |
925 | } | |
926 | ||
927 | if (sendline (server, "QUIT") || getok (server)) | |
928 | { | |
929 | ret = -1; | |
930 | } | |
931 | ||
932 | close (server->file); | |
933 | } | |
934 | ||
935 | if (server->buffer) | |
936 | free (server->buffer); | |
937 | free ((char *) server); | |
938 | ||
939 | return (ret); | |
940 | } | |
941 | ||
942 | /* | |
943 | * Function: socket_connection | |
944 | * | |
945 | * Purpose: Opens the network connection with the mail host, without | |
946 | * doing any sort of I/O with it or anything. | |
947 | * | |
948 | * Arguments: | |
949 | * host The host to which to connect. | |
950 | * flags Option flags. | |
951 | * | |
952 | * Return value: A file descriptor indicating the connection, or -1 | |
953 | * indicating failure, in which case an error has been copied | |
954 | * into pop_error. | |
955 | */ | |
956 | static int | |
957 | socket_connection (host, flags) | |
958 | char *host; | |
959 | int flags; | |
960 | { | |
961 | struct hostent *hostent; | |
962 | struct servent *servent; | |
963 | struct sockaddr_in addr; | |
964 | char found_port = 0; | |
965 | char *service; | |
966 | int sock; | |
967 | #ifdef KERBEROS | |
968 | #ifdef KRB5 | |
969 | krb5_error_code rem; | |
970 | krb5_ccache ccdef; | |
971 | krb5_principal client, server; | |
972 | krb5_error *err_ret; | |
973 | register char *cp; | |
974 | #else | |
975 | KTEXT ticket; | |
976 | MSG_DAT msg_data; | |
977 | CREDENTIALS cred; | |
978 | Key_schedule schedule; | |
979 | int rem; | |
980 | #endif /* KRB5 */ | |
981 | #endif /* KERBEROS */ | |
982 | ||
983 | int try_count = 0; | |
984 | ||
985 | do | |
986 | { | |
987 | hostent = gethostbyname (host); | |
988 | try_count++; | |
989 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
990 | { | |
991 | strcpy (pop_error, "Could not determine POP server's address"); | |
992 | return (-1); | |
993 | } | |
994 | } while (! hostent); | |
995 | ||
996 | bzero ((char *) &addr, sizeof (addr)); | |
997 | addr.sin_family = AF_INET; | |
998 | ||
999 | #ifdef KERBEROS | |
1000 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1001 | #else | |
1002 | service = POP_SERVICE; | |
1003 | #endif | |
1004 | ||
1005 | #ifdef HESIOD | |
1006 | if (! (flags & POP_NO_HESIOD)) | |
1007 | { | |
1008 | servent = hes_getservbyname (service, "tcp"); | |
1009 | if (servent) | |
1010 | { | |
1011 | addr.sin_port = servent->s_port; | |
1012 | found_port = 1; | |
1013 | } | |
1014 | } | |
1015 | #endif | |
1016 | if (! found_port) | |
1017 | { | |
1018 | servent = getservbyname (service, "tcp"); | |
1019 | if (servent) | |
1020 | { | |
1021 | addr.sin_port = servent->s_port; | |
1022 | } | |
1023 | else | |
1024 | { | |
1025 | #ifdef KERBEROS | |
1026 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1027 | POP_PORT : KPOP_PORT); | |
1028 | #else | |
1029 | addr.sin_port = htons (POP_PORT); | |
1030 | #endif | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | #define SOCKET_ERROR "Could not create socket for POP connection: " | |
1035 | ||
1036 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1037 | if (sock < 0) | |
1038 | { | |
1039 | strcpy (pop_error, SOCKET_ERROR); | |
1040 | strncat (pop_error, strerror (errno), | |
1041 | ERROR_MAX - sizeof (SOCKET_ERROR)); | |
1042 | return (-1); | |
1043 | ||
1044 | } | |
1045 | ||
1046 | while (*hostent->h_addr_list) | |
1047 | { | |
1048 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1049 | hostent->h_length); | |
1050 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1051 | break; | |
1052 | hostent->h_addr_list++; | |
1053 | } | |
1054 | ||
1055 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1056 | ||
1057 | if (! *hostent->h_addr_list) | |
1058 | { | |
1059 | (void) close (sock); | |
1060 | strcpy (pop_error, CONNECT_ERROR); | |
1061 | strncat (pop_error, strerror (errno), | |
1062 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1063 | return (-1); | |
1064 | ||
1065 | } | |
1066 | ||
1067 | #ifdef KERBEROS | |
1068 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1069 | if (! (flags & POP_NO_KERBEROS)) | |
1070 | { | |
1071 | #ifdef KRB5 | |
1072 | krb5_init_ets (); | |
1073 | ||
1074 | if (rem = krb5_cc_default (&ccdef)) | |
1075 | { | |
1076 | krb5error: | |
1077 | strcpy (pop_error, KRB_ERROR); | |
1078 | strncat (pop_error, error_message (rem), | |
1079 | ERROR_MAX - sizeof(KRB_ERROR)); | |
1080 | (void) close (sock); | |
1081 | return (-1); | |
1082 | } | |
1083 | ||
1084 | if (rem = krb5_cc_get_principal (ccdef, &client)) | |
1085 | { | |
1086 | goto krb5error; | |
1087 | } | |
1088 | ||
1089 | for (cp = hostent->h_name; *cp; cp++) | |
1090 | { | |
1091 | if (isupper (*cp)) | |
1092 | { | |
1093 | *cp = tolower (*cp); | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE, | |
1098 | FALSE, &server)) | |
1099 | { | |
1100 | goto krb5error; | |
1101 | } | |
1102 | ||
1103 | rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server, | |
1104 | AP_OPTS_MUTUAL_REQUIRED, | |
1105 | 0, /* no checksum */ | |
1106 | 0, /* no creds, use ccache instead */ | |
1107 | ccdef, | |
1108 | 0, /* don't need seq # */ | |
1109 | 0, /* don't need subsession key */ | |
1110 | &err_ret, | |
1111 | 0); /* don't need reply */ | |
1112 | krb5_free_principal (server); | |
1113 | if (rem) | |
1114 | { | |
1115 | if (err_ret && err_ret->text.length) | |
1116 | { | |
1117 | strcpy (pop_error, KRB_ERROR); | |
1118 | strncat (pop_error, error_message (rem), | |
1119 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1120 | strncat (pop_error, " [server says '", | |
1121 | ERROR_MAX - strlen (pop_error) - 1); | |
1122 | strncat (pop_error, err_ret->text.data, | |
1123 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1124 | err_ret->text.length)); | |
1125 | strncat (pop_error, "']", | |
1126 | ERROR_MAX - strlen (pop_error) - 1); | |
1127 | } | |
1128 | else | |
1129 | { | |
1130 | strcpy (pop_error, KRB_ERROR); | |
1131 | strncat (pop_error, error_message (rem), | |
1132 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1133 | } | |
1134 | if (err_ret) | |
1135 | krb5_free_error (err_ret); | |
1136 | ||
1137 | (void) close (sock); | |
1138 | return (-1); | |
1139 | } | |
1140 | #else /* ! KRB5 */ | |
1141 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); | |
1142 | rem = krb_sendauth (0L, sock, ticket, "pop", hostent->h_name, | |
1143 | (char *) krb_realmofhost (hostent->h_name), | |
1144 | (unsigned long) 0, &msg_data, &cred, schedule, | |
1145 | (struct sockaddr_in *) 0, | |
1146 | (struct sockaddr_in *) 0, | |
1147 | "KPOPV0.1"); | |
1148 | free ((char *) ticket); | |
1149 | if (rem != KSUCCESS) | |
1150 | { | |
1151 | strcpy (pop_error, KRB_ERROR); | |
1152 | strncat (pop_error, krb_err_txt[rem], | |
1153 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1154 | (void) close (sock); | |
1155 | return (-1); | |
1156 | } | |
1157 | #endif /* KRB5 */ | |
1158 | } | |
1159 | #endif /* KERBEROS */ | |
1160 | ||
1161 | return (sock); | |
1162 | } /* socket_connection */ | |
1163 | ||
1164 | /* | |
1165 | * Function: getline | |
1166 | * | |
1167 | * Purpose: Get a line of text from the connection and return a | |
1168 | * pointer to it. The carriage return and linefeed at the end of | |
1169 | * the line are stripped, but periods at the beginnings of lines | |
1170 | * are NOT dealt with in any special way. | |
1171 | * | |
1172 | * Arguments: | |
1173 | * server The server from which to get the line of text. | |
1174 | * | |
1175 | * Returns: A non-null pointer if successful, or a null pointer on any | |
1176 | * error, with an error message copied into pop_error. | |
1177 | * | |
1178 | * Notes: The line returned is overwritten with each call to getline. | |
1179 | * | |
1180 | * Side effects: Closes the connection on error. | |
1181 | */ | |
1182 | static char * | |
1183 | getline (server) | |
1184 | popserver server; | |
1185 | { | |
1186 | #define GETLINE_ERROR "Error reading from server: " | |
1187 | ||
1188 | int ret; | |
b6606ad8 RS |
1189 | int search_offset = 0; |
1190 | ||
9c0f2dac RS |
1191 | if (server->data) |
1192 | { | |
8148baf9 | 1193 | char *cp = find_crlf (server->buffer + server->buffer_index); |
9c0f2dac RS |
1194 | if (cp) |
1195 | { | |
1196 | int found; | |
1197 | int data_used; | |
1198 | ||
1199 | found = server->buffer_index; | |
1200 | data_used = (cp + 2) - server->buffer - found; | |
1201 | ||
1202 | *cp = '\0'; /* terminate the string to be returned */ | |
1203 | server->data -= data_used; | |
1204 | server->buffer_index += data_used; | |
1205 | ||
1206 | if (pop_debug) | |
1207 | fprintf (stderr, "<<< %s\n", server->buffer + found); | |
1208 | return (server->buffer + found); | |
1209 | } | |
1210 | else | |
1211 | { | |
1212 | bcopy (server->buffer + server->buffer_index, | |
1213 | server->buffer, server->data); | |
b6606ad8 RS |
1214 | /* Record the fact that we've searched the data already in |
1215 | the buffer for a CRLF, so that when we search below, we | |
1216 | don't have to search the same data twice. There's a "- | |
1217 | 1" here to account for the fact that the last character | |
1218 | of the data we have may be the CR of a CRLF pair, of | |
1219 | which we haven't read the second half yet, so we may have | |
1220 | to search it again when we read more data. */ | |
1221 | search_offset = server->data - 1; | |
9c0f2dac RS |
1222 | server->buffer_index = 0; |
1223 | } | |
1224 | } | |
1225 | else | |
1226 | { | |
1227 | server->buffer_index = 0; | |
1228 | } | |
1229 | ||
1230 | while (1) | |
1231 | { | |
b6606ad8 RS |
1232 | /* There's a "- 1" here to leave room for the null that we put |
1233 | at the end of the read data below. We put the null there so | |
1234 | that find_crlf knows where to stop when we call it. */ | |
1235 | if (server->data == server->buffer_size - 1) | |
9c0f2dac RS |
1236 | { |
1237 | server->buffer_size += GETLINE_INCR; | |
7d665945 | 1238 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); |
9c0f2dac RS |
1239 | if (! server->buffer) |
1240 | { | |
1241 | strcpy (pop_error, "Out of memory in getline"); | |
1242 | pop_trash (server); | |
1243 | return (0); | |
1244 | } | |
1245 | } | |
1246 | ret = read (server->file, server->buffer + server->data, | |
7a481e50 | 1247 | server->buffer_size - server->data - 1); |
9c0f2dac RS |
1248 | if (ret < 0) |
1249 | { | |
1250 | strcpy (pop_error, GETLINE_ERROR); | |
1251 | strncat (pop_error, strerror (errno), | |
1252 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1253 | pop_trash (server); | |
1254 | return (0); | |
1255 | } | |
1256 | else if (ret == 0) | |
1257 | { | |
1258 | strcpy (pop_error, "Unexpected EOF from server in getline"); | |
1259 | pop_trash (server); | |
1260 | return (0); | |
1261 | } | |
1262 | else | |
1263 | { | |
7a481e50 | 1264 | char *cp; |
9c0f2dac | 1265 | server->data += ret; |
7a481e50 | 1266 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1267 | |
b6606ad8 | 1268 | cp = find_crlf (server->buffer + search_offset); |
9c0f2dac RS |
1269 | if (cp) |
1270 | { | |
1271 | int data_used = (cp + 2) - server->buffer; | |
1272 | *cp = '\0'; | |
1273 | server->data -= data_used; | |
1274 | server->buffer_index = data_used; | |
1275 | ||
1276 | if (pop_debug) | |
1277 | fprintf (stderr, "<<< %s\n", server->buffer); | |
1278 | return (server->buffer); | |
1279 | } | |
b6606ad8 | 1280 | search_offset += ret; |
9c0f2dac RS |
1281 | } |
1282 | } | |
1283 | ||
1284 | /* NOTREACHED */ | |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * Function: sendline | |
1289 | * | |
1290 | * Purpose: Sends a line of text to the POP server. The line of text | |
1291 | * passed into this function should NOT have the carriage return | |
1292 | * and linefeed on the end of it. Periods at beginnings of lines | |
1293 | * will NOT be treated specially by this function. | |
1294 | * | |
1295 | * Arguments: | |
1296 | * server The server to which to send the text. | |
1297 | * line The line of text to send. | |
1298 | * | |
1299 | * Return value: Upon successful completion, a value of 0 will be | |
1300 | * returned. Otherwise, a non-zero value will be returned, and | |
1301 | * an error will be copied into pop_error. | |
1302 | * | |
1303 | * Side effects: Closes the connection on error. | |
1304 | */ | |
1305 | static int | |
1306 | sendline (server, line) | |
1307 | popserver server; | |
1308 | char *line; | |
1309 | { | |
1310 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1311 | int ret; | |
1312 | ||
1313 | ret = fullwrite (server->file, line, strlen (line)); | |
1314 | if (ret >= 0) | |
1315 | { /* 0 indicates that a blank line was written */ | |
1316 | ret = fullwrite (server->file, "\r\n", 2); | |
1317 | } | |
1318 | ||
1319 | if (ret < 0) | |
1320 | { | |
1321 | pop_trash (server); | |
1322 | strcpy (pop_error, SENDLINE_ERROR); | |
1323 | strncat (pop_error, strerror (errno), | |
1324 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1325 | return (ret); | |
1326 | } | |
1327 | ||
1328 | if (pop_debug) | |
1329 | fprintf (stderr, ">>> %s\n", line); | |
1330 | ||
1331 | return (0); | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * Procedure: fullwrite | |
1336 | * | |
1337 | * Purpose: Just like write, but keeps trying until the entire string | |
1338 | * has been written. | |
1339 | * | |
1340 | * Return value: Same as write. Pop_error is not set. | |
1341 | */ | |
1342 | static int | |
1343 | fullwrite (fd, buf, nbytes) | |
1344 | int fd; | |
1345 | char *buf; | |
1346 | int nbytes; | |
1347 | { | |
1348 | char *cp; | |
1349 | int ret; | |
1350 | ||
1351 | cp = buf; | |
1352 | while ((ret = write (fd, cp, nbytes)) > 0) | |
1353 | { | |
1354 | cp += ret; | |
1355 | nbytes -= ret; | |
1356 | } | |
1357 | ||
1358 | return (ret); | |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * Procedure getok | |
1363 | * | |
1364 | * Purpose: Reads a line from the server. If the return indicator is | |
1365 | * positive, return with a zero exit status. If not, return with | |
1366 | * a negative exit status. | |
1367 | * | |
1368 | * Arguments: | |
1369 | * server The server to read from. | |
1370 | * | |
1371 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1372 | * | |
8e6208c5 | 1373 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1374 | */ |
1375 | static int | |
1376 | getok (server) | |
1377 | popserver server; | |
1378 | { | |
1379 | char *fromline; | |
1380 | ||
1381 | if (! (fromline = getline (server))) | |
1382 | { | |
1383 | return (-1); | |
1384 | } | |
1385 | ||
1386 | if (! strncmp (fromline, "+OK", 3)) | |
1387 | return (0); | |
1388 | else if (! strncmp (fromline, "-ERR", 4)) | |
1389 | { | |
1390 | strncpy (pop_error, fromline, ERROR_MAX); | |
1391 | pop_error[ERROR_MAX-1] = '\0'; | |
1392 | return (-1); | |
1393 | } | |
1394 | else | |
1395 | { | |
1396 | strcpy (pop_error, | |
1397 | "Unexpected response from server; expecting +OK or -ERR"); | |
1398 | pop_trash (server); | |
1399 | return (-1); | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | #if 0 | |
1404 | /* | |
1405 | * Function: gettermination | |
1406 | * | |
1407 | * Purpose: Gets the next line and verifies that it is a termination | |
1408 | * line (nothing but a dot). | |
1409 | * | |
1410 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1411 | * | |
1412 | * Side effects: Closes the connection on error. | |
1413 | */ | |
1414 | static int | |
1415 | gettermination (server) | |
1416 | popserver server; | |
1417 | { | |
1418 | char *fromserver; | |
1419 | ||
1420 | fromserver = getline (server); | |
1421 | if (! fromserver) | |
1422 | return (-1); | |
1423 | ||
1424 | if (strcmp (fromserver, ".")) | |
1425 | { | |
1426 | strcpy (pop_error, | |
1427 | "Unexpected response from server in gettermination"); | |
1428 | pop_trash (server); | |
1429 | return (-1); | |
1430 | } | |
1431 | ||
1432 | return (0); | |
1433 | } | |
1434 | #endif | |
1435 | ||
1436 | /* | |
1437 | * Function pop_close | |
1438 | * | |
1439 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1440 | * preserve any changes that were made and a "QUIT" command to | |
1441 | * try to get the server to quit, but ignoring any responses that | |
1442 | * are received. | |
1443 | * | |
8e6208c5 | 1444 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1445 | * Changes made to the maildrop since the session was started (or |
1446 | * since the last pop_reset) may be lost. | |
1447 | */ | |
1448 | void | |
1449 | pop_close (server) | |
1450 | popserver server; | |
1451 | { | |
1452 | pop_trash (server); | |
1453 | free ((char *) server); | |
1454 | ||
1455 | return; | |
1456 | } | |
1457 | ||
1458 | /* | |
1459 | * Function: pop_trash | |
1460 | * | |
1461 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1462 | * memory associated with the server. It is legal to call | |
1463 | * pop_close or pop_quit after this function has been called. | |
1464 | */ | |
1465 | static void | |
1466 | pop_trash (server) | |
1467 | popserver server; | |
1468 | { | |
1469 | if (server->file >= 0) | |
1470 | { | |
1471 | sendline (server, "RSET"); | |
1472 | sendline (server, "QUIT"); | |
1473 | ||
1474 | close (server->file); | |
1475 | server->file = -1; | |
1476 | if (server->buffer) | |
1477 | { | |
1478 | free (server->buffer); | |
1479 | server->buffer = 0; | |
1480 | } | |
1481 | } | |
1482 | } | |
1483 | ||
8148baf9 RS |
1484 | /* Return a pointer to the first CRLF in IN_STRING, |
1485 | or 0 if it does not contain one. */ | |
9c0f2dac RS |
1486 | |
1487 | static char * | |
8148baf9 RS |
1488 | find_crlf (in_string) |
1489 | char *in_string; | |
9c0f2dac | 1490 | { |
8148baf9 | 1491 | while (1) |
9c0f2dac | 1492 | { |
8148baf9 RS |
1493 | if (! *in_string) |
1494 | return (0); | |
1495 | else if (*in_string == '\r') | |
1496 | { | |
1497 | if (*++in_string == '\n') | |
1498 | return (in_string - 1); | |
1499 | } | |
1500 | else | |
1501 | in_string++; | |
9c0f2dac | 1502 | } |
8148baf9 | 1503 | /* NOTREACHED */ |
9c0f2dac RS |
1504 | } |
1505 | ||
1506 | #endif /* MAIL_USE_POP */ |