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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 | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
c9c3d8f6 RS |
21 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ |
22 | #include <../src/config.h> | |
23 | ||
6d683104 RS |
24 | #under open |
25 | #undef close | |
26 | #undef read | |
27 | #undef write | |
28 | ||
9c0f2dac RS |
29 | #ifdef MAIL_USE_POP |
30 | ||
31 | #include <sys/types.h> | |
32 | #include <netinet/in.h> | |
33 | #include <sys/socket.h> | |
34 | #include <pop.h> | |
625ad89f | 35 | |
9c0f2dac RS |
36 | #ifdef sun |
37 | #include <malloc.h> | |
9c0f2dac | 38 | #endif |
625ad89f | 39 | |
9c0f2dac RS |
40 | #ifdef HESIOD |
41 | #include <hesiod.h> | |
42 | /* | |
43 | * It really shouldn't be necessary to put this declaration here, but | |
44 | * the version of hesiod.h that Athena has installed in release 7.2 | |
45 | * doesn't declare this function; I don't know if the 7.3 version of | |
46 | * hesiod.h does. | |
47 | */ | |
48 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
49 | #endif | |
625ad89f | 50 | |
9c0f2dac | 51 | #include <pwd.h> |
9c0f2dac RS |
52 | #include <netdb.h> |
53 | #include <errno.h> | |
54 | #include <stdio.h> | |
625ad89f RS |
55 | |
56 | extern char *getenv (/* char * */); | |
57 | extern char *getlogin (/* void */); | |
58 | extern char *getpass (/* char * */); | |
59 | extern char *strerror (/* int */); | |
60 | ||
9c0f2dac RS |
61 | #ifdef KERBEROS |
62 | #ifndef KRB5 | |
9c0f2dac | 63 | #include <des.h> |
7a481e50 | 64 | #include <krb.h> |
9c0f2dac RS |
65 | #else /* KRB5 */ |
66 | #include <krb5/krb5.h> | |
67 | #include <krb5/ext-proto.h> | |
68 | #include <ctype.h> | |
69 | #endif /* KRB5 */ | |
70 | ||
9c0f2dac RS |
71 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
72 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, | |
73 | struct sockaddr_in *, struct sockaddr_in *, | |
74 | char * */); | |
75 | extern char *krb_realmofhost (/* char * */); | |
76 | #endif | |
77 | ||
78 | #ifndef HAVE_H_ERRNO | |
79 | extern int h_errno; | |
80 | #endif | |
81 | ||
82 | static int socket_connection (/* char *, int */); | |
83 | static char *getline (/* popserver */); | |
84 | static int sendline (/* popserver, char * */); | |
85 | static int fullwrite (/* int, char *, int */); | |
86 | static int getok (/* popserver */); | |
87 | #if 0 | |
88 | static int gettermination (/* popserver */); | |
89 | #endif | |
90 | static void pop_trash (/* popserver */); | |
91 | ||
7a481e50 RS |
92 | static char *my_strstr (); |
93 | ||
9c0f2dac RS |
94 | #define ERROR_MAX 80 /* a pretty arbitrary size */ |
95 | #define POP_PORT 110 | |
96 | #define KPOP_PORT 1109 | |
97 | #define POP_SERVICE "pop" | |
98 | #ifdef KERBEROS | |
99 | #ifdef KRB5 | |
100 | #define KPOP_SERVICE "k5pop"; | |
101 | #else | |
102 | #define KPOP_SERVICE "kpop" | |
103 | #endif | |
104 | #endif | |
105 | ||
106 | char pop_error[ERROR_MAX]; | |
107 | int pop_debug = 0; | |
108 | ||
109 | #ifndef min | |
110 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
111 | #endif | |
112 | ||
113 | /* | |
114 | * Function: pop_open (char *host, char *username, char *password, | |
115 | * int flags) | |
116 | * | |
117 | * Purpose: Establishes a connection with a post-office server, and | |
118 | * completes the authorization portion of the session. | |
119 | * | |
120 | * Arguments: | |
121 | * host The server host with which the connection should be | |
122 | * established. Optional. If omitted, internal | |
123 | * heuristics will be used to determine the server host, | |
124 | * if possible. | |
125 | * username | |
126 | * The username of the mail-drop to access. Optional. | |
127 | * If omitted, internal heuristics will be used to | |
128 | * determine the username, if possible. | |
129 | * password | |
130 | * The password to use for authorization. If omitted, | |
131 | * internal heuristics will be used to determine the | |
132 | * password, if possible. | |
133 | * flags A bit mask containing flags controlling certain | |
134 | * functions of the routine. Valid flags are defined in | |
135 | * the file pop.h | |
136 | * | |
137 | * Return value: Upon successful establishment of a connection, a | |
138 | * non-null popserver will be returned. Otherwise, null will be | |
139 | * returned, and the string variable pop_error will contain an | |
140 | * explanation of the error. | |
141 | */ | |
142 | popserver | |
143 | pop_open (host, username, password, flags) | |
144 | char *host; | |
145 | char *username; | |
146 | char *password; | |
147 | int flags; | |
148 | { | |
149 | int sock; | |
150 | popserver server; | |
151 | ||
152 | /* Determine the user name */ | |
153 | if (! username) | |
154 | { | |
155 | username = getenv ("USER"); | |
156 | if (! (username && *username)) | |
157 | { | |
158 | username = getlogin (); | |
159 | if (! (username && *username)) | |
160 | { | |
161 | struct passwd *passwd; | |
162 | passwd = getpwuid (getuid ()); | |
163 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
164 | { | |
165 | username = passwd->pw_name; | |
166 | } | |
167 | else | |
168 | { | |
169 | strcpy (pop_error, "Could not determine username"); | |
170 | return (0); | |
171 | } | |
172 | } | |
173 | } | |
174 | } | |
175 | ||
176 | /* | |
177 | * Determine the mail host. | |
178 | */ | |
179 | ||
180 | if (! host) | |
181 | { | |
182 | host = getenv ("MAILHOST"); | |
183 | } | |
184 | ||
185 | #ifdef HESIOD | |
186 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
187 | { | |
188 | struct hes_postoffice *office; | |
189 | office = hes_getmailhost (username); | |
190 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
191 | && office->po_name && *office->po_name && office->po_host | |
192 | && *office->po_host) | |
193 | { | |
194 | host = office->po_host; | |
195 | username = office->po_name; | |
196 | } | |
197 | } | |
198 | #endif | |
199 | ||
200 | #ifdef MAILHOST | |
201 | if (! host) | |
202 | { | |
203 | host = MAILHOST; | |
204 | } | |
205 | #endif | |
206 | ||
207 | if (! host) | |
208 | { | |
209 | strcpy (pop_error, "Could not determine POP server"); | |
210 | return (0); | |
211 | } | |
212 | ||
213 | /* Determine the password */ | |
214 | #ifdef KERBEROS | |
215 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
216 | #else | |
217 | #define DONT_NEED_PASSWORD 0 | |
218 | #endif | |
219 | ||
220 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
221 | { | |
222 | if (! (flags & POP_NO_GETPASS)) | |
223 | { | |
224 | password = getpass ("Enter POP password:"); | |
225 | } | |
226 | if (! password) | |
227 | { | |
228 | strcpy (pop_error, "Could not determine POP password"); | |
229 | return (0); | |
230 | } | |
231 | } | |
232 | if (password) | |
233 | flags |= POP_NO_KERBEROS; | |
234 | else | |
235 | password = username; | |
236 | ||
237 | sock = socket_connection (host, flags); | |
238 | if (sock == -1) | |
239 | return (0); | |
240 | ||
241 | server = (popserver) malloc (sizeof (struct _popserver)); | |
242 | if (! server) | |
243 | { | |
244 | strcpy (pop_error, "Out of memory in pop_open"); | |
245 | return (0); | |
246 | } | |
247 | server->buffer = (char *) malloc (GETLINE_MIN); | |
248 | if (! server->buffer) | |
249 | { | |
250 | strcpy (pop_error, "Out of memory in pop_open"); | |
251 | free ((char *) server); | |
252 | return (0); | |
253 | } | |
254 | ||
255 | server->file = sock; | |
256 | server->data = 0; | |
257 | server->buffer_index = 0; | |
258 | server->buffer_size = GETLINE_MIN; | |
259 | server->in_multi = 0; | |
260 | ||
261 | if (getok (server)) | |
262 | return (0); | |
263 | ||
264 | /* | |
265 | * I really shouldn't use the pop_error variable like this, but.... | |
266 | */ | |
267 | if (strlen (username) > ERROR_MAX - 6) | |
268 | { | |
269 | pop_close (server); | |
270 | strcpy (pop_error, | |
271 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
272 | return (0); | |
273 | } | |
274 | sprintf (pop_error, "USER %s", username); | |
275 | ||
276 | if (sendline (server, pop_error) || getok (server)) | |
277 | { | |
278 | return (0); | |
279 | } | |
280 | ||
281 | if (strlen (password) > ERROR_MAX - 6) | |
282 | { | |
283 | pop_close (server); | |
284 | strcpy (pop_error, | |
285 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
286 | return (0); | |
287 | } | |
288 | sprintf (pop_error, "PASS %s", password); | |
289 | ||
290 | if (sendline (server, pop_error) || getok (server)) | |
291 | { | |
292 | return (0); | |
293 | } | |
294 | ||
295 | return (server); | |
296 | } | |
297 | ||
298 | /* | |
299 | * Function: pop_stat | |
300 | * | |
301 | * Purpose: Issue the STAT command to the server and return (in the | |
302 | * value parameters) the number of messages in the maildrop and | |
303 | * the total size of the maildrop. | |
304 | * | |
305 | * Return value: 0 on success, or non-zero with an error in pop_error | |
306 | * in failure. | |
307 | * | |
308 | * Side effects: On failure, may make further operations on the | |
309 | * connection impossible. | |
310 | */ | |
311 | int | |
312 | pop_stat (server, count, size) | |
313 | popserver server; | |
314 | int *count; | |
315 | int *size; | |
316 | { | |
317 | char *fromserver; | |
318 | ||
319 | if (server->in_multi) | |
320 | { | |
321 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
322 | return (-1); | |
323 | } | |
324 | ||
325 | if (sendline (server, "STAT") || (! (fromserver = getline (server)))) | |
326 | return (-1); | |
327 | ||
328 | if (strncmp (fromserver, "+OK ", 4)) | |
329 | { | |
330 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
331 | { | |
332 | strncpy (pop_error, fromserver, ERROR_MAX); | |
333 | } | |
334 | else | |
335 | { | |
336 | strcpy (pop_error, | |
337 | "Unexpected response from POP server in pop_stat"); | |
338 | pop_trash (server); | |
339 | } | |
340 | return (-1); | |
341 | } | |
342 | ||
343 | *count = atoi (&fromserver[4]); | |
344 | ||
345 | fromserver = index (&fromserver[4], ' '); | |
346 | if (! fromserver) | |
347 | { | |
348 | strcpy (pop_error, | |
349 | "Badly formatted response from server in pop_stat"); | |
350 | pop_trash (server); | |
351 | return (-1); | |
352 | } | |
353 | ||
354 | *size = atoi (fromserver + 1); | |
355 | ||
356 | return (0); | |
357 | } | |
358 | ||
359 | /* | |
360 | * Function: pop_list | |
361 | * | |
362 | * Purpose: Performs the POP "list" command and returns (in value | |
363 | * parameters) two malloc'd zero-terminated arrays -- one of | |
364 | * message IDs, and a parallel one of sizes. | |
365 | * | |
366 | * Arguments: | |
367 | * server The pop connection to talk to. | |
368 | * message The number of the one message about which to get | |
369 | * information, or 0 to get information about all | |
370 | * messages. | |
371 | * | |
372 | * Return value: 0 on success, non-zero with error in pop_error on | |
373 | * failure. | |
374 | * | |
375 | * Side effects: On failure, may make further operations on the | |
376 | * connection impossible. | |
377 | */ | |
378 | int | |
379 | pop_list (server, message, IDs, sizes) | |
380 | popserver server; | |
381 | int message; | |
382 | int **IDs; | |
383 | int **sizes; | |
384 | { | |
385 | int how_many, i; | |
386 | char *fromserver; | |
387 | ||
388 | if (server->in_multi) | |
389 | { | |
390 | strcpy (pop_error, "In multi-line query in pop_list"); | |
391 | return (-1); | |
392 | } | |
393 | ||
394 | if (message) | |
395 | how_many = 1; | |
396 | else | |
397 | { | |
398 | int count, size; | |
399 | if (pop_stat (server, &count, &size)) | |
400 | return (-1); | |
401 | how_many = count; | |
402 | } | |
403 | ||
404 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
405 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
406 | if (! (*IDs && *sizes)) | |
407 | { | |
408 | strcpy (pop_error, "Out of memory in pop_list"); | |
409 | return (-1); | |
410 | } | |
411 | ||
412 | if (message) | |
413 | { | |
414 | sprintf (pop_error, "LIST %d", message); | |
415 | if (sendline (server, pop_error)) | |
416 | { | |
417 | free ((char *) *IDs); | |
418 | free ((char *) *sizes); | |
419 | return (-1); | |
420 | } | |
421 | if (! (fromserver = getline (server))) | |
422 | { | |
423 | free ((char *) *IDs); | |
424 | free ((char *) *sizes); | |
425 | return (-1); | |
426 | } | |
427 | if (strncmp (fromserver, "+OK ", 4)) | |
428 | { | |
429 | if (! strncmp (fromserver, "-ERR", 4)) | |
430 | strncpy (pop_error, fromserver, ERROR_MAX); | |
431 | else | |
432 | { | |
433 | strcpy (pop_error, | |
434 | "Unexpected response from server in pop_list"); | |
435 | pop_trash (server); | |
436 | } | |
437 | free ((char *) *IDs); | |
438 | free ((char *) *sizes); | |
439 | return (-1); | |
440 | } | |
441 | (*IDs)[0] = atoi (&fromserver[4]); | |
442 | fromserver = index (&fromserver[4], ' '); | |
443 | if (! fromserver) | |
444 | { | |
445 | strcpy (pop_error, | |
446 | "Badly formatted response from server in pop_list"); | |
447 | pop_trash (server); | |
448 | free ((char *) *IDs); | |
449 | free ((char *) *sizes); | |
450 | return (-1); | |
451 | } | |
452 | (*sizes)[0] = atoi (fromserver); | |
453 | (*IDs)[1] = (*sizes)[1] = 0; | |
454 | return (0); | |
455 | } | |
456 | else | |
457 | { | |
458 | if (pop_multi_first (server, "LIST", &fromserver)) | |
459 | { | |
460 | free ((char *) *IDs); | |
461 | free ((char *) *sizes); | |
462 | return (-1); | |
463 | } | |
464 | for (i = 0; i < how_many; i++) | |
465 | { | |
466 | if (pop_multi_next (server, &fromserver)) | |
467 | { | |
468 | free ((char *) *IDs); | |
469 | free ((char *) *sizes); | |
470 | return (-1); | |
471 | } | |
472 | (*IDs)[i] = atoi (fromserver); | |
473 | fromserver = index (fromserver, ' '); | |
474 | if (! fromserver) | |
475 | { | |
476 | strcpy (pop_error, | |
477 | "Badly formatted response from server in pop_list"); | |
478 | free ((char *) *IDs); | |
479 | free ((char *) *sizes); | |
480 | pop_trash (server); | |
481 | return (-1); | |
482 | } | |
483 | (*sizes)[i] = atoi (fromserver); | |
484 | } | |
485 | if (pop_multi_next (server, &fromserver)) | |
486 | { | |
487 | free ((char *) *IDs); | |
488 | free ((char *) *sizes); | |
489 | return (-1); | |
490 | } | |
491 | else if (fromserver) | |
492 | { | |
493 | strcpy (pop_error, | |
494 | "Too many response lines from server in pop_list"); | |
495 | free ((char *) *IDs); | |
496 | free ((char *) *sizes); | |
497 | return (-1); | |
498 | } | |
499 | (*IDs)[i] = (*sizes)[i] = 0; | |
500 | return (0); | |
501 | } | |
502 | } | |
503 | ||
504 | /* | |
505 | * Function: pop_retrieve | |
506 | * | |
507 | * Purpose: Retrieve a specified message from the maildrop. | |
508 | * | |
509 | * Arguments: | |
510 | * server The server to retrieve from. | |
511 | * message The message number to retrieve. | |
512 | * markfrom | |
513 | * If true, then mark the string "From " at the beginning | |
514 | * of lines with '>'. | |
515 | * | |
516 | * Return value: A string pointing to the message, if successful, or | |
517 | * null with pop_error set if not. | |
518 | * | |
519 | * Side effects: May kill connection on error. | |
520 | */ | |
521 | char * | |
522 | pop_retrieve (server, message, markfrom) | |
523 | popserver server; | |
524 | int message; | |
525 | int markfrom; | |
526 | { | |
527 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
528 | char *ptr, *fromserver; | |
529 | int ret; | |
530 | ||
531 | if (server->in_multi) | |
532 | { | |
533 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
534 | return (0); | |
535 | } | |
536 | ||
537 | if (pop_list (server, message, &IDs, &sizes)) | |
538 | return (0); | |
539 | ||
540 | if (pop_retrieve_first (server, message, &fromserver)) | |
541 | { | |
542 | return (0); | |
543 | } | |
544 | ||
545 | /* | |
546 | * The "5" below is an arbitrary constant -- I assume that if | |
547 | * there are "From" lines in the text to be marked, there | |
548 | * probably won't be more than 5 of them. If there are, I | |
549 | * allocate more space for them below. | |
550 | */ | |
551 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
552 | ptr = malloc (bufsize); | |
553 | free ((char *) IDs); | |
554 | free ((char *) sizes); | |
555 | ||
556 | if (! ptr) | |
557 | { | |
558 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
559 | pop_retrieve_flush (server); | |
560 | return (0); | |
561 | } | |
562 | ||
563 | while (! (ret = pop_retrieve_next (server, &fromserver))) | |
564 | { | |
565 | int linesize; | |
566 | ||
567 | if (! fromserver) | |
568 | { | |
569 | ptr[cp] = '\0'; | |
570 | return (ptr); | |
571 | } | |
572 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
573 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
574 | fromserver[4] == ' ') | |
575 | { | |
576 | if (++fromcount == 5) | |
577 | { | |
578 | bufsize += 5; | |
579 | ptr = realloc (ptr, bufsize); | |
580 | if (! ptr) | |
581 | { | |
582 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
583 | pop_retrieve_flush (server); | |
584 | return (0); | |
585 | } | |
586 | fromcount = 0; | |
587 | } | |
588 | ptr[cp++] = '>'; | |
589 | } | |
590 | linesize = strlen (fromserver); | |
591 | bcopy (fromserver, &ptr[cp], linesize); | |
592 | cp += linesize; | |
593 | ptr[cp++] = '\n'; | |
594 | } | |
595 | ||
596 | if (ret) | |
597 | { | |
598 | free (ptr); | |
599 | return (0); | |
600 | } | |
601 | } | |
602 | ||
603 | int | |
604 | pop_retrieve_first (server, message, response) | |
605 | popserver server; | |
606 | int message; | |
607 | char **response; | |
608 | { | |
609 | sprintf (pop_error, "RETR %d", message); | |
610 | return (pop_multi_first (server, pop_error, response)); | |
611 | } | |
612 | ||
613 | int | |
614 | pop_retrieve_next (server, line) | |
615 | popserver server; | |
616 | char **line; | |
617 | { | |
618 | return (pop_multi_next (server, line)); | |
619 | } | |
620 | ||
621 | int | |
622 | pop_retrieve_flush (server) | |
623 | popserver server; | |
624 | { | |
625 | return (pop_multi_flush (server)); | |
626 | } | |
627 | ||
628 | int | |
629 | pop_top_first (server, message, lines, response) | |
630 | popserver server; | |
631 | int message, lines; | |
632 | char **response; | |
633 | { | |
634 | sprintf (pop_error, "TOP %d %d", message, lines); | |
635 | return (pop_multi_first (server, pop_error, response)); | |
636 | } | |
637 | ||
638 | int | |
639 | pop_top_next (server, line) | |
640 | popserver server; | |
641 | char **line; | |
642 | { | |
643 | return (pop_multi_next (server, line)); | |
644 | } | |
645 | ||
646 | int | |
647 | pop_top_flush (server) | |
648 | popserver server; | |
649 | { | |
650 | return (pop_multi_flush (server)); | |
651 | } | |
652 | ||
653 | int | |
654 | pop_multi_first (server, command, response) | |
655 | popserver server; | |
656 | char *command; | |
657 | char **response; | |
658 | { | |
659 | if (server->in_multi) | |
660 | { | |
661 | strcpy (pop_error, | |
662 | "Already in multi-line query in pop_multi_first"); | |
663 | return (-1); | |
664 | } | |
665 | ||
666 | if (sendline (server, command) || (! (*response = getline (server)))) | |
667 | { | |
668 | return (-1); | |
669 | } | |
670 | ||
671 | if (0 == strncmp (*response, "-ERR", 4)) | |
672 | { | |
673 | strncpy (pop_error, *response, ERROR_MAX); | |
674 | return (-1); | |
675 | } | |
676 | else if (0 == strncmp (*response, "+OK", 3)) | |
677 | { | |
678 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
679 | server->in_multi = 1; | |
680 | return (0); | |
681 | } | |
682 | else | |
683 | { | |
684 | strcpy (pop_error, | |
685 | "Unexpected response from server in pop_multi_first"); | |
686 | return (-1); | |
687 | } | |
688 | } | |
689 | ||
690 | int | |
691 | pop_multi_next (server, line) | |
692 | popserver server; | |
693 | char **line; | |
694 | { | |
695 | char *fromserver; | |
696 | ||
697 | if (! server->in_multi) | |
698 | { | |
699 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
700 | return (-1); | |
701 | } | |
702 | ||
703 | fromserver = getline (server); | |
704 | if (! fromserver) | |
705 | { | |
706 | return (-1); | |
707 | } | |
708 | ||
709 | if (fromserver[0] == '.') | |
710 | { | |
711 | if (! fromserver[1]) | |
712 | { | |
713 | *line = 0; | |
714 | server->in_multi = 0; | |
715 | return (0); | |
716 | } | |
717 | else | |
718 | { | |
719 | *line = fromserver + 1; | |
720 | return (0); | |
721 | } | |
722 | } | |
723 | else | |
724 | { | |
725 | *line = fromserver; | |
726 | return (0); | |
727 | } | |
728 | } | |
729 | ||
730 | int | |
731 | pop_multi_flush (server) | |
732 | popserver server; | |
733 | { | |
734 | char *line; | |
735 | ||
736 | if (! server->in_multi) | |
737 | { | |
738 | return (0); | |
739 | } | |
740 | ||
741 | while (! pop_multi_next (server, &line)) | |
742 | { | |
743 | if (! line) | |
744 | { | |
745 | return (0); | |
746 | } | |
747 | } | |
748 | ||
749 | return (-1); | |
750 | } | |
751 | ||
752 | /* Function: pop_delete | |
753 | * | |
754 | * Purpose: Delete a specified message. | |
755 | * | |
756 | * Arguments: | |
757 | * server Server from which to delete the message. | |
758 | * message Message to delete. | |
759 | * | |
760 | * Return value: 0 on success, non-zero with error in pop_error | |
761 | * otherwise. | |
762 | */ | |
763 | int | |
764 | pop_delete (server, message) | |
765 | popserver server; | |
766 | int message; | |
767 | { | |
768 | if (server->in_multi) | |
769 | { | |
770 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
771 | return (-1); | |
772 | } | |
773 | ||
774 | sprintf (pop_error, "DELE %d", message); | |
775 | ||
776 | if (sendline (server, pop_error) || getok (server)) | |
777 | return (-1); | |
778 | ||
779 | return (0); | |
780 | } | |
781 | ||
782 | /* | |
783 | * Function: pop_noop | |
784 | * | |
785 | * Purpose: Send a noop command to the server. | |
786 | * | |
787 | * Argument: | |
788 | * server The server to send to. | |
789 | * | |
790 | * Return value: 0 on success, non-zero with error in pop_error | |
791 | * otherwise. | |
792 | * | |
793 | * Side effects: Closes connection on error. | |
794 | */ | |
795 | int | |
796 | pop_noop (server) | |
797 | popserver server; | |
798 | { | |
799 | if (server->in_multi) | |
800 | { | |
801 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
802 | return (-1); | |
803 | } | |
804 | ||
805 | if (sendline (server, "NOOP") || getok (server)) | |
806 | return (-1); | |
807 | ||
808 | return (0); | |
809 | } | |
810 | ||
811 | /* | |
812 | * Function: pop_last | |
813 | * | |
814 | * Purpose: Find out the highest seen message from the server. | |
815 | * | |
816 | * Arguments: | |
817 | * server The server. | |
818 | * | |
819 | * Return value: If successful, the highest seen message, which is | |
820 | * greater than or equal to 0. Otherwise, a negative number with | |
821 | * the error explained in pop_error. | |
822 | * | |
823 | * Side effects: Closes the connection on error. | |
824 | */ | |
825 | int | |
826 | pop_last (server) | |
827 | popserver server; | |
828 | { | |
829 | char *fromserver; | |
830 | ||
831 | if (server->in_multi) | |
832 | { | |
833 | strcpy (pop_error, "In multi-line query in pop_last"); | |
834 | return (-1); | |
835 | } | |
836 | ||
837 | if (sendline (server, "LAST")) | |
838 | return (-1); | |
839 | ||
840 | if (! (fromserver = getline (server))) | |
841 | return (-1); | |
842 | ||
843 | if (! strncmp (fromserver, "-ERR", 4)) | |
844 | { | |
845 | strncpy (pop_error, fromserver, ERROR_MAX); | |
846 | return (-1); | |
847 | } | |
848 | else if (strncmp (fromserver, "+OK ", 4)) | |
849 | { | |
850 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
851 | pop_trash (server); | |
852 | return (-1); | |
853 | } | |
854 | else | |
855 | { | |
856 | return (atoi (&fromserver[4])); | |
857 | } | |
858 | } | |
859 | ||
860 | /* | |
861 | * Function: pop_reset | |
862 | * | |
863 | * Purpose: Reset the server to its initial connect state | |
864 | * | |
865 | * Arguments: | |
866 | * server The server. | |
867 | * | |
868 | * Return value: 0 for success, non-0 with error in pop_error | |
869 | * otherwise. | |
870 | * | |
871 | * Side effects: Closes the connection on error. | |
872 | */ | |
873 | int | |
874 | pop_reset (server) | |
875 | popserver server; | |
876 | { | |
877 | if (pop_retrieve_flush (server)) | |
878 | { | |
879 | return (-1); | |
880 | } | |
881 | ||
882 | if (sendline (server, "RSET") || getok (server)) | |
883 | return (-1); | |
884 | ||
885 | return (0); | |
886 | } | |
887 | ||
888 | /* | |
889 | * Function: pop_quit | |
890 | * | |
891 | * Purpose: Quit the connection to the server, | |
892 | * | |
893 | * Arguments: | |
894 | * server The server to quit. | |
895 | * | |
896 | * Return value: 0 for success, non-zero otherwise with error in | |
897 | * pop_error. | |
898 | * | |
899 | * Side Effects: The popserver passed in is unuseable after this | |
900 | * function is called, even if an error occurs. | |
901 | */ | |
902 | int | |
903 | pop_quit (server) | |
904 | popserver server; | |
905 | { | |
906 | int ret = 0; | |
907 | ||
908 | if (server->file >= 0) | |
909 | { | |
910 | if (pop_retrieve_flush (server)) | |
911 | { | |
912 | ret = -1; | |
913 | } | |
914 | ||
915 | if (sendline (server, "QUIT") || getok (server)) | |
916 | { | |
917 | ret = -1; | |
918 | } | |
919 | ||
920 | close (server->file); | |
921 | } | |
922 | ||
923 | if (server->buffer) | |
924 | free (server->buffer); | |
925 | free ((char *) server); | |
926 | ||
927 | return (ret); | |
928 | } | |
929 | ||
930 | /* | |
931 | * Function: socket_connection | |
932 | * | |
933 | * Purpose: Opens the network connection with the mail host, without | |
934 | * doing any sort of I/O with it or anything. | |
935 | * | |
936 | * Arguments: | |
937 | * host The host to which to connect. | |
938 | * flags Option flags. | |
939 | * | |
940 | * Return value: A file descriptor indicating the connection, or -1 | |
941 | * indicating failure, in which case an error has been copied | |
942 | * into pop_error. | |
943 | */ | |
944 | static int | |
945 | socket_connection (host, flags) | |
946 | char *host; | |
947 | int flags; | |
948 | { | |
949 | struct hostent *hostent; | |
950 | struct servent *servent; | |
951 | struct sockaddr_in addr; | |
952 | char found_port = 0; | |
953 | char *service; | |
954 | int sock; | |
955 | #ifdef KERBEROS | |
956 | #ifdef KRB5 | |
957 | krb5_error_code rem; | |
958 | krb5_ccache ccdef; | |
959 | krb5_principal client, server; | |
960 | krb5_error *err_ret; | |
961 | register char *cp; | |
962 | #else | |
963 | KTEXT ticket; | |
964 | MSG_DAT msg_data; | |
965 | CREDENTIALS cred; | |
966 | Key_schedule schedule; | |
967 | int rem; | |
968 | #endif /* KRB5 */ | |
969 | #endif /* KERBEROS */ | |
970 | ||
971 | int try_count = 0; | |
972 | ||
973 | do | |
974 | { | |
975 | hostent = gethostbyname (host); | |
976 | try_count++; | |
977 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
978 | { | |
979 | strcpy (pop_error, "Could not determine POP server's address"); | |
980 | return (-1); | |
981 | } | |
982 | } while (! hostent); | |
983 | ||
984 | bzero ((char *) &addr, sizeof (addr)); | |
985 | addr.sin_family = AF_INET; | |
986 | ||
987 | #ifdef KERBEROS | |
988 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
989 | #else | |
990 | service = POP_SERVICE; | |
991 | #endif | |
992 | ||
993 | #ifdef HESIOD | |
994 | if (! (flags & POP_NO_HESIOD)) | |
995 | { | |
996 | servent = hes_getservbyname (service, "tcp"); | |
997 | if (servent) | |
998 | { | |
999 | addr.sin_port = servent->s_port; | |
1000 | found_port = 1; | |
1001 | } | |
1002 | } | |
1003 | #endif | |
1004 | if (! found_port) | |
1005 | { | |
1006 | servent = getservbyname (service, "tcp"); | |
1007 | if (servent) | |
1008 | { | |
1009 | addr.sin_port = servent->s_port; | |
1010 | } | |
1011 | else | |
1012 | { | |
1013 | #ifdef KERBEROS | |
1014 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1015 | POP_PORT : KPOP_PORT); | |
1016 | #else | |
1017 | addr.sin_port = htons (POP_PORT); | |
1018 | #endif | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | #define SOCKET_ERROR "Could not create socket for POP connection: " | |
1023 | ||
1024 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1025 | if (sock < 0) | |
1026 | { | |
1027 | strcpy (pop_error, SOCKET_ERROR); | |
1028 | strncat (pop_error, strerror (errno), | |
1029 | ERROR_MAX - sizeof (SOCKET_ERROR)); | |
1030 | return (-1); | |
1031 | ||
1032 | } | |
1033 | ||
1034 | while (*hostent->h_addr_list) | |
1035 | { | |
1036 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1037 | hostent->h_length); | |
1038 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1039 | break; | |
1040 | hostent->h_addr_list++; | |
1041 | } | |
1042 | ||
1043 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1044 | ||
1045 | if (! *hostent->h_addr_list) | |
1046 | { | |
1047 | (void) close (sock); | |
1048 | strcpy (pop_error, CONNECT_ERROR); | |
1049 | strncat (pop_error, strerror (errno), | |
1050 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1051 | return (-1); | |
1052 | ||
1053 | } | |
1054 | ||
1055 | #ifdef KERBEROS | |
1056 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1057 | if (! (flags & POP_NO_KERBEROS)) | |
1058 | { | |
1059 | #ifdef KRB5 | |
1060 | krb5_init_ets (); | |
1061 | ||
1062 | if (rem = krb5_cc_default (&ccdef)) | |
1063 | { | |
1064 | krb5error: | |
1065 | strcpy (pop_error, KRB_ERROR); | |
1066 | strncat (pop_error, error_message (rem), | |
1067 | ERROR_MAX - sizeof(KRB_ERROR)); | |
1068 | (void) close (sock); | |
1069 | return (-1); | |
1070 | } | |
1071 | ||
1072 | if (rem = krb5_cc_get_principal (ccdef, &client)) | |
1073 | { | |
1074 | goto krb5error; | |
1075 | } | |
1076 | ||
1077 | for (cp = hostent->h_name; *cp; cp++) | |
1078 | { | |
1079 | if (isupper (*cp)) | |
1080 | { | |
1081 | *cp = tolower (*cp); | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE, | |
1086 | FALSE, &server)) | |
1087 | { | |
1088 | goto krb5error; | |
1089 | } | |
1090 | ||
1091 | rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server, | |
1092 | AP_OPTS_MUTUAL_REQUIRED, | |
1093 | 0, /* no checksum */ | |
1094 | 0, /* no creds, use ccache instead */ | |
1095 | ccdef, | |
1096 | 0, /* don't need seq # */ | |
1097 | 0, /* don't need subsession key */ | |
1098 | &err_ret, | |
1099 | 0); /* don't need reply */ | |
1100 | krb5_free_principal (server); | |
1101 | if (rem) | |
1102 | { | |
1103 | if (err_ret && err_ret->text.length) | |
1104 | { | |
1105 | strcpy (pop_error, KRB_ERROR); | |
1106 | strncat (pop_error, error_message (rem), | |
1107 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1108 | strncat (pop_error, " [server says '", | |
1109 | ERROR_MAX - strlen (pop_error) - 1); | |
1110 | strncat (pop_error, err_ret->text.data, | |
1111 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1112 | err_ret->text.length)); | |
1113 | strncat (pop_error, "']", | |
1114 | ERROR_MAX - strlen (pop_error) - 1); | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | strcpy (pop_error, KRB_ERROR); | |
1119 | strncat (pop_error, error_message (rem), | |
1120 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1121 | } | |
1122 | if (err_ret) | |
1123 | krb5_free_error (err_ret); | |
1124 | ||
1125 | (void) close (sock); | |
1126 | return (-1); | |
1127 | } | |
1128 | #else /* ! KRB5 */ | |
1129 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); | |
1130 | rem = krb_sendauth (0L, sock, ticket, "pop", hostent->h_name, | |
1131 | (char *) krb_realmofhost (hostent->h_name), | |
1132 | (unsigned long) 0, &msg_data, &cred, schedule, | |
1133 | (struct sockaddr_in *) 0, | |
1134 | (struct sockaddr_in *) 0, | |
1135 | "KPOPV0.1"); | |
1136 | free ((char *) ticket); | |
1137 | if (rem != KSUCCESS) | |
1138 | { | |
1139 | strcpy (pop_error, KRB_ERROR); | |
1140 | strncat (pop_error, krb_err_txt[rem], | |
1141 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1142 | (void) close (sock); | |
1143 | return (-1); | |
1144 | } | |
1145 | #endif /* KRB5 */ | |
1146 | } | |
1147 | #endif /* KERBEROS */ | |
1148 | ||
1149 | return (sock); | |
1150 | } /* socket_connection */ | |
1151 | ||
1152 | /* | |
1153 | * Function: getline | |
1154 | * | |
1155 | * Purpose: Get a line of text from the connection and return a | |
1156 | * pointer to it. The carriage return and linefeed at the end of | |
1157 | * the line are stripped, but periods at the beginnings of lines | |
1158 | * are NOT dealt with in any special way. | |
1159 | * | |
1160 | * Arguments: | |
1161 | * server The server from which to get the line of text. | |
1162 | * | |
1163 | * Returns: A non-null pointer if successful, or a null pointer on any | |
1164 | * error, with an error message copied into pop_error. | |
1165 | * | |
1166 | * Notes: The line returned is overwritten with each call to getline. | |
1167 | * | |
1168 | * Side effects: Closes the connection on error. | |
1169 | */ | |
1170 | static char * | |
1171 | getline (server) | |
1172 | popserver server; | |
1173 | { | |
1174 | #define GETLINE_ERROR "Error reading from server: " | |
1175 | ||
1176 | int ret; | |
1177 | ||
1178 | if (server->data) | |
1179 | { | |
7a481e50 | 1180 | char *cp = my_strstr (server->buffer + server->buffer_index, "\r\n"); |
9c0f2dac RS |
1181 | if (cp) |
1182 | { | |
1183 | int found; | |
1184 | int data_used; | |
1185 | ||
1186 | found = server->buffer_index; | |
1187 | data_used = (cp + 2) - server->buffer - found; | |
1188 | ||
1189 | *cp = '\0'; /* terminate the string to be returned */ | |
1190 | server->data -= data_used; | |
1191 | server->buffer_index += data_used; | |
1192 | ||
1193 | if (pop_debug) | |
1194 | fprintf (stderr, "<<< %s\n", server->buffer + found); | |
1195 | return (server->buffer + found); | |
1196 | } | |
1197 | else | |
1198 | { | |
1199 | bcopy (server->buffer + server->buffer_index, | |
1200 | server->buffer, server->data); | |
1201 | server->buffer_index = 0; | |
1202 | } | |
1203 | } | |
1204 | else | |
1205 | { | |
1206 | server->buffer_index = 0; | |
1207 | } | |
1208 | ||
1209 | while (1) | |
1210 | { | |
1211 | if (server->data == server->buffer_size) | |
1212 | { | |
1213 | server->buffer_size += GETLINE_INCR; | |
1214 | server->buffer = realloc (server->buffer, server->buffer_size); | |
1215 | if (! server->buffer) | |
1216 | { | |
1217 | strcpy (pop_error, "Out of memory in getline"); | |
1218 | pop_trash (server); | |
1219 | return (0); | |
1220 | } | |
1221 | } | |
1222 | ret = read (server->file, server->buffer + server->data, | |
7a481e50 | 1223 | server->buffer_size - server->data - 1); |
9c0f2dac RS |
1224 | if (ret < 0) |
1225 | { | |
1226 | strcpy (pop_error, GETLINE_ERROR); | |
1227 | strncat (pop_error, strerror (errno), | |
1228 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1229 | pop_trash (server); | |
1230 | return (0); | |
1231 | } | |
1232 | else if (ret == 0) | |
1233 | { | |
1234 | strcpy (pop_error, "Unexpected EOF from server in getline"); | |
1235 | pop_trash (server); | |
1236 | return (0); | |
1237 | } | |
1238 | else | |
1239 | { | |
7a481e50 | 1240 | char *cp; |
9c0f2dac | 1241 | server->data += ret; |
7a481e50 | 1242 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1243 | |
7a481e50 | 1244 | cp = my_strstr (server->buffer, "\r\n"); |
9c0f2dac RS |
1245 | if (cp) |
1246 | { | |
1247 | int data_used = (cp + 2) - server->buffer; | |
1248 | *cp = '\0'; | |
1249 | server->data -= data_used; | |
1250 | server->buffer_index = data_used; | |
1251 | ||
1252 | if (pop_debug) | |
1253 | fprintf (stderr, "<<< %s\n", server->buffer); | |
1254 | return (server->buffer); | |
1255 | } | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | /* NOTREACHED */ | |
1260 | } | |
1261 | ||
1262 | /* | |
1263 | * Function: sendline | |
1264 | * | |
1265 | * Purpose: Sends a line of text to the POP server. The line of text | |
1266 | * passed into this function should NOT have the carriage return | |
1267 | * and linefeed on the end of it. Periods at beginnings of lines | |
1268 | * will NOT be treated specially by this function. | |
1269 | * | |
1270 | * Arguments: | |
1271 | * server The server to which to send the text. | |
1272 | * line The line of text to send. | |
1273 | * | |
1274 | * Return value: Upon successful completion, a value of 0 will be | |
1275 | * returned. Otherwise, a non-zero value will be returned, and | |
1276 | * an error will be copied into pop_error. | |
1277 | * | |
1278 | * Side effects: Closes the connection on error. | |
1279 | */ | |
1280 | static int | |
1281 | sendline (server, line) | |
1282 | popserver server; | |
1283 | char *line; | |
1284 | { | |
1285 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1286 | int ret; | |
1287 | ||
1288 | ret = fullwrite (server->file, line, strlen (line)); | |
1289 | if (ret >= 0) | |
1290 | { /* 0 indicates that a blank line was written */ | |
1291 | ret = fullwrite (server->file, "\r\n", 2); | |
1292 | } | |
1293 | ||
1294 | if (ret < 0) | |
1295 | { | |
1296 | pop_trash (server); | |
1297 | strcpy (pop_error, SENDLINE_ERROR); | |
1298 | strncat (pop_error, strerror (errno), | |
1299 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1300 | return (ret); | |
1301 | } | |
1302 | ||
1303 | if (pop_debug) | |
1304 | fprintf (stderr, ">>> %s\n", line); | |
1305 | ||
1306 | return (0); | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * Procedure: fullwrite | |
1311 | * | |
1312 | * Purpose: Just like write, but keeps trying until the entire string | |
1313 | * has been written. | |
1314 | * | |
1315 | * Return value: Same as write. Pop_error is not set. | |
1316 | */ | |
1317 | static int | |
1318 | fullwrite (fd, buf, nbytes) | |
1319 | int fd; | |
1320 | char *buf; | |
1321 | int nbytes; | |
1322 | { | |
1323 | char *cp; | |
1324 | int ret; | |
1325 | ||
1326 | cp = buf; | |
1327 | while ((ret = write (fd, cp, nbytes)) > 0) | |
1328 | { | |
1329 | cp += ret; | |
1330 | nbytes -= ret; | |
1331 | } | |
1332 | ||
1333 | return (ret); | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * Procedure getok | |
1338 | * | |
1339 | * Purpose: Reads a line from the server. If the return indicator is | |
1340 | * positive, return with a zero exit status. If not, return with | |
1341 | * a negative exit status. | |
1342 | * | |
1343 | * Arguments: | |
1344 | * server The server to read from. | |
1345 | * | |
1346 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1347 | * | |
1348 | * Side effects: On failure, may make the connection unuseable. | |
1349 | */ | |
1350 | static int | |
1351 | getok (server) | |
1352 | popserver server; | |
1353 | { | |
1354 | char *fromline; | |
1355 | ||
1356 | if (! (fromline = getline (server))) | |
1357 | { | |
1358 | return (-1); | |
1359 | } | |
1360 | ||
1361 | if (! strncmp (fromline, "+OK", 3)) | |
1362 | return (0); | |
1363 | else if (! strncmp (fromline, "-ERR", 4)) | |
1364 | { | |
1365 | strncpy (pop_error, fromline, ERROR_MAX); | |
1366 | pop_error[ERROR_MAX-1] = '\0'; | |
1367 | return (-1); | |
1368 | } | |
1369 | else | |
1370 | { | |
1371 | strcpy (pop_error, | |
1372 | "Unexpected response from server; expecting +OK or -ERR"); | |
1373 | pop_trash (server); | |
1374 | return (-1); | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | #if 0 | |
1379 | /* | |
1380 | * Function: gettermination | |
1381 | * | |
1382 | * Purpose: Gets the next line and verifies that it is a termination | |
1383 | * line (nothing but a dot). | |
1384 | * | |
1385 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1386 | * | |
1387 | * Side effects: Closes the connection on error. | |
1388 | */ | |
1389 | static int | |
1390 | gettermination (server) | |
1391 | popserver server; | |
1392 | { | |
1393 | char *fromserver; | |
1394 | ||
1395 | fromserver = getline (server); | |
1396 | if (! fromserver) | |
1397 | return (-1); | |
1398 | ||
1399 | if (strcmp (fromserver, ".")) | |
1400 | { | |
1401 | strcpy (pop_error, | |
1402 | "Unexpected response from server in gettermination"); | |
1403 | pop_trash (server); | |
1404 | return (-1); | |
1405 | } | |
1406 | ||
1407 | return (0); | |
1408 | } | |
1409 | #endif | |
1410 | ||
1411 | /* | |
1412 | * Function pop_close | |
1413 | * | |
1414 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1415 | * preserve any changes that were made and a "QUIT" command to | |
1416 | * try to get the server to quit, but ignoring any responses that | |
1417 | * are received. | |
1418 | * | |
1419 | * Side effects: The server is unuseable after this function returns. | |
1420 | * Changes made to the maildrop since the session was started (or | |
1421 | * since the last pop_reset) may be lost. | |
1422 | */ | |
1423 | void | |
1424 | pop_close (server) | |
1425 | popserver server; | |
1426 | { | |
1427 | pop_trash (server); | |
1428 | free ((char *) server); | |
1429 | ||
1430 | return; | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * Function: pop_trash | |
1435 | * | |
1436 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1437 | * memory associated with the server. It is legal to call | |
1438 | * pop_close or pop_quit after this function has been called. | |
1439 | */ | |
1440 | static void | |
1441 | pop_trash (server) | |
1442 | popserver server; | |
1443 | { | |
1444 | if (server->file >= 0) | |
1445 | { | |
1446 | sendline (server, "RSET"); | |
1447 | sendline (server, "QUIT"); | |
1448 | ||
1449 | close (server->file); | |
1450 | server->file = -1; | |
1451 | if (server->buffer) | |
1452 | { | |
1453 | free (server->buffer); | |
1454 | server->buffer = 0; | |
1455 | } | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | /* Search in STRING for an occurrence of SUBSTRING | |
1460 | and return a pointer to that occurrence. | |
1461 | Return 0 if SUBSTRING does not occur in STRING. */ | |
1462 | ||
1463 | static char * | |
1464 | my_strstr (string, substring) | |
1465 | char *string, *substring; | |
1466 | { | |
1467 | char *p = string; | |
1468 | ||
1469 | while (*p) | |
1470 | { | |
1471 | if (!strcmp (p, substring)) | |
1472 | return p; | |
1473 | p++; | |
1474 | } | |
1475 | return 0; | |
1476 | } | |
1477 | ||
1478 | #endif /* MAIL_USE_POP */ |