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