Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
c2668a61 | 2 | Copyright (c) 1991, 1993, 1996 Free Software Foundation, Inc. |
9c0f2dac RS |
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> | |
c2668a61 RS |
40 | #ifdef WINDOWSNT |
41 | #include "ntlib.h" | |
42 | #include <winsock.h> | |
43 | #undef SOCKET_ERROR | |
de5c39cf RS |
44 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
45 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
46 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 47 | #else |
9c0f2dac RS |
48 | #include <netinet/in.h> |
49 | #include <sys/socket.h> | |
de5c39cf RS |
50 | #define RECV(s,buf,len,flags) read(s,buf,len) |
51 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
52 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 53 | #endif |
9c0f2dac | 54 | #include <pop.h> |
625ad89f | 55 | |
9c0f2dac RS |
56 | #ifdef sun |
57 | #include <malloc.h> | |
8148baf9 | 58 | #endif /* sun */ |
625ad89f | 59 | |
9c0f2dac RS |
60 | #ifdef HESIOD |
61 | #include <hesiod.h> | |
62 | /* | |
63 | * It really shouldn't be necessary to put this declaration here, but | |
64 | * the version of hesiod.h that Athena has installed in release 7.2 | |
65 | * doesn't declare this function; I don't know if the 7.3 version of | |
66 | * hesiod.h does. | |
67 | */ | |
68 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
69 | #endif | |
625ad89f | 70 | |
9c0f2dac | 71 | #include <pwd.h> |
9c0f2dac RS |
72 | #include <netdb.h> |
73 | #include <errno.h> | |
74 | #include <stdio.h> | |
625ad89f | 75 | |
9c0f2dac RS |
76 | #ifdef KERBEROS |
77 | #ifndef KRB5 | |
41f21300 | 78 | #ifndef SOLARIS2 |
9c0f2dac | 79 | #include <des.h> |
7a481e50 | 80 | #include <krb.h> |
41f21300 | 81 | #else /* not SOLARIS2 */ |
40f28099 RS |
82 | #include <kerberos/des.h> |
83 | #include <kerberos/krb.h> | |
41f21300 | 84 | #endif /* not SOLARIS2 */ |
9c0f2dac RS |
85 | #else /* KRB5 */ |
86 | #include <krb5/krb5.h> | |
87 | #include <krb5/ext-proto.h> | |
88 | #include <ctype.h> | |
89 | #endif /* KRB5 */ | |
8148baf9 | 90 | #endif /* KERBEROS */ |
9c0f2dac | 91 | |
8148baf9 RS |
92 | extern char *getenv (/* char * */); |
93 | extern char *getlogin (/* void */); | |
94 | extern char *getpass (/* char * */); | |
95 | extern char *strerror (/* int */); | |
7d665945 | 96 | extern char *index (); |
8148baf9 RS |
97 | |
98 | #ifdef KERBEROS | |
99 | #ifndef KRB5 | |
9c0f2dac | 100 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
101 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
102 | struct sockaddr_in *, struct sockaddr_in *, | |
103 | char * */); | |
9c0f2dac | 104 | extern char *krb_realmofhost (/* char * */); |
8148baf9 RS |
105 | #endif /* ! KRB5 */ |
106 | #endif /* KERBEROS */ | |
9c0f2dac | 107 | |
c2668a61 | 108 | #ifndef WINDOWSNT |
8148baf9 | 109 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
110 | extern int h_errno; |
111 | #endif | |
c2668a61 | 112 | #endif |
9c0f2dac RS |
113 | |
114 | static int socket_connection (/* char *, int */); | |
115 | static char *getline (/* popserver */); | |
116 | static int sendline (/* popserver, char * */); | |
117 | static int fullwrite (/* int, char *, int */); | |
118 | static int getok (/* popserver */); | |
119 | #if 0 | |
120 | static int gettermination (/* popserver */); | |
121 | #endif | |
122 | static void pop_trash (/* popserver */); | |
8148baf9 | 123 | static char *find_crlf (/* char * */); |
7a481e50 | 124 | |
9c0f2dac RS |
125 | #define ERROR_MAX 80 /* a pretty arbitrary size */ |
126 | #define POP_PORT 110 | |
127 | #define KPOP_PORT 1109 | |
c2668a61 RS |
128 | #ifdef WINDOWSNT |
129 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ | |
130 | #else | |
9c0f2dac | 131 | #define POP_SERVICE "pop" |
c2668a61 | 132 | #endif |
9c0f2dac RS |
133 | #ifdef KERBEROS |
134 | #ifdef KRB5 | |
135 | #define KPOP_SERVICE "k5pop"; | |
136 | #else | |
137 | #define KPOP_SERVICE "kpop" | |
138 | #endif | |
139 | #endif | |
140 | ||
141 | char pop_error[ERROR_MAX]; | |
142 | int pop_debug = 0; | |
143 | ||
144 | #ifndef min | |
145 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
146 | #endif | |
147 | ||
148 | /* | |
149 | * Function: pop_open (char *host, char *username, char *password, | |
150 | * int flags) | |
151 | * | |
152 | * Purpose: Establishes a connection with a post-office server, and | |
153 | * completes the authorization portion of the session. | |
154 | * | |
155 | * Arguments: | |
156 | * host The server host with which the connection should be | |
157 | * established. Optional. If omitted, internal | |
158 | * heuristics will be used to determine the server host, | |
159 | * if possible. | |
160 | * username | |
161 | * The username of the mail-drop to access. Optional. | |
162 | * If omitted, internal heuristics will be used to | |
163 | * determine the username, if possible. | |
164 | * password | |
165 | * The password to use for authorization. If omitted, | |
166 | * internal heuristics will be used to determine the | |
167 | * password, if possible. | |
168 | * flags A bit mask containing flags controlling certain | |
169 | * functions of the routine. Valid flags are defined in | |
170 | * the file pop.h | |
171 | * | |
172 | * Return value: Upon successful establishment of a connection, a | |
173 | * non-null popserver will be returned. Otherwise, null will be | |
174 | * returned, and the string variable pop_error will contain an | |
175 | * explanation of the error. | |
176 | */ | |
177 | popserver | |
178 | pop_open (host, username, password, flags) | |
179 | char *host; | |
180 | char *username; | |
181 | char *password; | |
182 | int flags; | |
183 | { | |
184 | int sock; | |
185 | popserver server; | |
186 | ||
187 | /* Determine the user name */ | |
188 | if (! username) | |
189 | { | |
190 | username = getenv ("USER"); | |
191 | if (! (username && *username)) | |
192 | { | |
193 | username = getlogin (); | |
194 | if (! (username && *username)) | |
195 | { | |
196 | struct passwd *passwd; | |
197 | passwd = getpwuid (getuid ()); | |
198 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
199 | { | |
200 | username = passwd->pw_name; | |
201 | } | |
202 | else | |
203 | { | |
204 | strcpy (pop_error, "Could not determine username"); | |
205 | return (0); | |
206 | } | |
207 | } | |
208 | } | |
209 | } | |
210 | ||
211 | /* | |
212 | * Determine the mail host. | |
213 | */ | |
214 | ||
215 | if (! host) | |
216 | { | |
217 | host = getenv ("MAILHOST"); | |
218 | } | |
219 | ||
220 | #ifdef HESIOD | |
221 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
222 | { | |
223 | struct hes_postoffice *office; | |
224 | office = hes_getmailhost (username); | |
225 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
226 | && office->po_name && *office->po_name && office->po_host | |
227 | && *office->po_host) | |
228 | { | |
229 | host = office->po_host; | |
230 | username = office->po_name; | |
231 | } | |
232 | } | |
233 | #endif | |
234 | ||
235 | #ifdef MAILHOST | |
236 | if (! host) | |
237 | { | |
238 | host = MAILHOST; | |
239 | } | |
240 | #endif | |
241 | ||
242 | if (! host) | |
243 | { | |
244 | strcpy (pop_error, "Could not determine POP server"); | |
245 | return (0); | |
246 | } | |
247 | ||
248 | /* Determine the password */ | |
249 | #ifdef KERBEROS | |
250 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
251 | #else | |
252 | #define DONT_NEED_PASSWORD 0 | |
253 | #endif | |
254 | ||
255 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
256 | { | |
257 | if (! (flags & POP_NO_GETPASS)) | |
258 | { | |
259 | password = getpass ("Enter POP password:"); | |
260 | } | |
261 | if (! password) | |
262 | { | |
263 | strcpy (pop_error, "Could not determine POP password"); | |
264 | return (0); | |
265 | } | |
266 | } | |
267 | if (password) | |
268 | flags |= POP_NO_KERBEROS; | |
269 | else | |
270 | password = username; | |
271 | ||
272 | sock = socket_connection (host, flags); | |
273 | if (sock == -1) | |
274 | return (0); | |
275 | ||
276 | server = (popserver) malloc (sizeof (struct _popserver)); | |
277 | if (! server) | |
278 | { | |
279 | strcpy (pop_error, "Out of memory in pop_open"); | |
280 | return (0); | |
281 | } | |
282 | server->buffer = (char *) malloc (GETLINE_MIN); | |
283 | if (! server->buffer) | |
284 | { | |
285 | strcpy (pop_error, "Out of memory in pop_open"); | |
286 | free ((char *) server); | |
287 | return (0); | |
288 | } | |
289 | ||
290 | server->file = sock; | |
291 | server->data = 0; | |
292 | server->buffer_index = 0; | |
293 | server->buffer_size = GETLINE_MIN; | |
294 | server->in_multi = 0; | |
c2668a61 | 295 | server->trash_started = 0; |
9c0f2dac RS |
296 | |
297 | if (getok (server)) | |
298 | return (0); | |
299 | ||
300 | /* | |
301 | * I really shouldn't use the pop_error variable like this, but.... | |
302 | */ | |
303 | if (strlen (username) > ERROR_MAX - 6) | |
304 | { | |
305 | pop_close (server); | |
306 | strcpy (pop_error, | |
307 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
308 | return (0); | |
309 | } | |
310 | sprintf (pop_error, "USER %s", username); | |
311 | ||
312 | if (sendline (server, pop_error) || getok (server)) | |
313 | { | |
314 | return (0); | |
315 | } | |
316 | ||
317 | if (strlen (password) > ERROR_MAX - 6) | |
318 | { | |
319 | pop_close (server); | |
320 | strcpy (pop_error, | |
321 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
322 | return (0); | |
323 | } | |
324 | sprintf (pop_error, "PASS %s", password); | |
325 | ||
326 | if (sendline (server, pop_error) || getok (server)) | |
327 | { | |
328 | return (0); | |
329 | } | |
330 | ||
331 | return (server); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Function: pop_stat | |
336 | * | |
337 | * Purpose: Issue the STAT command to the server and return (in the | |
338 | * value parameters) the number of messages in the maildrop and | |
339 | * the total size of the maildrop. | |
340 | * | |
341 | * Return value: 0 on success, or non-zero with an error in pop_error | |
342 | * in failure. | |
343 | * | |
344 | * Side effects: On failure, may make further operations on the | |
345 | * connection impossible. | |
346 | */ | |
347 | int | |
348 | pop_stat (server, count, size) | |
349 | popserver server; | |
350 | int *count; | |
351 | int *size; | |
352 | { | |
353 | char *fromserver; | |
354 | ||
355 | if (server->in_multi) | |
356 | { | |
357 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
358 | return (-1); | |
359 | } | |
360 | ||
361 | if (sendline (server, "STAT") || (! (fromserver = getline (server)))) | |
362 | return (-1); | |
363 | ||
364 | if (strncmp (fromserver, "+OK ", 4)) | |
365 | { | |
366 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
367 | { | |
368 | strncpy (pop_error, fromserver, ERROR_MAX); | |
369 | } | |
370 | else | |
371 | { | |
372 | strcpy (pop_error, | |
373 | "Unexpected response from POP server in pop_stat"); | |
374 | pop_trash (server); | |
375 | } | |
376 | return (-1); | |
377 | } | |
378 | ||
379 | *count = atoi (&fromserver[4]); | |
380 | ||
381 | fromserver = index (&fromserver[4], ' '); | |
382 | if (! fromserver) | |
383 | { | |
384 | strcpy (pop_error, | |
385 | "Badly formatted response from server in pop_stat"); | |
386 | pop_trash (server); | |
387 | return (-1); | |
388 | } | |
389 | ||
390 | *size = atoi (fromserver + 1); | |
391 | ||
392 | return (0); | |
393 | } | |
394 | ||
395 | /* | |
396 | * Function: pop_list | |
397 | * | |
398 | * Purpose: Performs the POP "list" command and returns (in value | |
399 | * parameters) two malloc'd zero-terminated arrays -- one of | |
400 | * message IDs, and a parallel one of sizes. | |
401 | * | |
402 | * Arguments: | |
403 | * server The pop connection to talk to. | |
404 | * message The number of the one message about which to get | |
405 | * information, or 0 to get information about all | |
406 | * messages. | |
407 | * | |
408 | * Return value: 0 on success, non-zero with error in pop_error on | |
409 | * failure. | |
410 | * | |
411 | * Side effects: On failure, may make further operations on the | |
412 | * connection impossible. | |
413 | */ | |
414 | int | |
415 | pop_list (server, message, IDs, sizes) | |
416 | popserver server; | |
417 | int message; | |
418 | int **IDs; | |
419 | int **sizes; | |
420 | { | |
421 | int how_many, i; | |
422 | char *fromserver; | |
423 | ||
424 | if (server->in_multi) | |
425 | { | |
426 | strcpy (pop_error, "In multi-line query in pop_list"); | |
427 | return (-1); | |
428 | } | |
429 | ||
430 | if (message) | |
431 | how_many = 1; | |
432 | else | |
433 | { | |
434 | int count, size; | |
435 | if (pop_stat (server, &count, &size)) | |
436 | return (-1); | |
437 | how_many = count; | |
438 | } | |
439 | ||
440 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
441 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
442 | if (! (*IDs && *sizes)) | |
443 | { | |
444 | strcpy (pop_error, "Out of memory in pop_list"); | |
445 | return (-1); | |
446 | } | |
447 | ||
448 | if (message) | |
449 | { | |
450 | sprintf (pop_error, "LIST %d", message); | |
451 | if (sendline (server, pop_error)) | |
452 | { | |
453 | free ((char *) *IDs); | |
454 | free ((char *) *sizes); | |
455 | return (-1); | |
456 | } | |
457 | if (! (fromserver = getline (server))) | |
458 | { | |
459 | free ((char *) *IDs); | |
460 | free ((char *) *sizes); | |
461 | return (-1); | |
462 | } | |
463 | if (strncmp (fromserver, "+OK ", 4)) | |
464 | { | |
465 | if (! strncmp (fromserver, "-ERR", 4)) | |
466 | strncpy (pop_error, fromserver, ERROR_MAX); | |
467 | else | |
468 | { | |
469 | strcpy (pop_error, | |
470 | "Unexpected response from server in pop_list"); | |
471 | pop_trash (server); | |
472 | } | |
473 | free ((char *) *IDs); | |
474 | free ((char *) *sizes); | |
475 | return (-1); | |
476 | } | |
477 | (*IDs)[0] = atoi (&fromserver[4]); | |
478 | fromserver = index (&fromserver[4], ' '); | |
479 | if (! fromserver) | |
480 | { | |
481 | strcpy (pop_error, | |
482 | "Badly formatted response from server in pop_list"); | |
483 | pop_trash (server); | |
484 | free ((char *) *IDs); | |
485 | free ((char *) *sizes); | |
486 | return (-1); | |
487 | } | |
488 | (*sizes)[0] = atoi (fromserver); | |
489 | (*IDs)[1] = (*sizes)[1] = 0; | |
490 | return (0); | |
491 | } | |
492 | else | |
493 | { | |
494 | if (pop_multi_first (server, "LIST", &fromserver)) | |
495 | { | |
496 | free ((char *) *IDs); | |
497 | free ((char *) *sizes); | |
498 | return (-1); | |
499 | } | |
500 | for (i = 0; i < how_many; i++) | |
501 | { | |
502 | if (pop_multi_next (server, &fromserver)) | |
503 | { | |
504 | free ((char *) *IDs); | |
505 | free ((char *) *sizes); | |
506 | return (-1); | |
507 | } | |
508 | (*IDs)[i] = atoi (fromserver); | |
509 | fromserver = index (fromserver, ' '); | |
510 | if (! fromserver) | |
511 | { | |
512 | strcpy (pop_error, | |
513 | "Badly formatted response from server in pop_list"); | |
514 | free ((char *) *IDs); | |
515 | free ((char *) *sizes); | |
516 | pop_trash (server); | |
517 | return (-1); | |
518 | } | |
519 | (*sizes)[i] = atoi (fromserver); | |
520 | } | |
521 | if (pop_multi_next (server, &fromserver)) | |
522 | { | |
523 | free ((char *) *IDs); | |
524 | free ((char *) *sizes); | |
525 | return (-1); | |
526 | } | |
527 | else if (fromserver) | |
528 | { | |
529 | strcpy (pop_error, | |
530 | "Too many response lines from server in pop_list"); | |
531 | free ((char *) *IDs); | |
532 | free ((char *) *sizes); | |
533 | return (-1); | |
534 | } | |
535 | (*IDs)[i] = (*sizes)[i] = 0; | |
536 | return (0); | |
537 | } | |
538 | } | |
539 | ||
540 | /* | |
541 | * Function: pop_retrieve | |
542 | * | |
543 | * Purpose: Retrieve a specified message from the maildrop. | |
544 | * | |
545 | * Arguments: | |
546 | * server The server to retrieve from. | |
547 | * message The message number to retrieve. | |
548 | * markfrom | |
549 | * If true, then mark the string "From " at the beginning | |
550 | * of lines with '>'. | |
551 | * | |
552 | * Return value: A string pointing to the message, if successful, or | |
553 | * null with pop_error set if not. | |
554 | * | |
555 | * Side effects: May kill connection on error. | |
556 | */ | |
557 | char * | |
558 | pop_retrieve (server, message, markfrom) | |
559 | popserver server; | |
560 | int message; | |
561 | int markfrom; | |
562 | { | |
563 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
564 | char *ptr, *fromserver; | |
565 | int ret; | |
566 | ||
567 | if (server->in_multi) | |
568 | { | |
569 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
570 | return (0); | |
571 | } | |
572 | ||
573 | if (pop_list (server, message, &IDs, &sizes)) | |
574 | return (0); | |
575 | ||
576 | if (pop_retrieve_first (server, message, &fromserver)) | |
577 | { | |
578 | return (0); | |
579 | } | |
580 | ||
581 | /* | |
582 | * The "5" below is an arbitrary constant -- I assume that if | |
583 | * there are "From" lines in the text to be marked, there | |
584 | * probably won't be more than 5 of them. If there are, I | |
585 | * allocate more space for them below. | |
586 | */ | |
587 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 588 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
589 | free ((char *) IDs); |
590 | free ((char *) sizes); | |
591 | ||
592 | if (! ptr) | |
593 | { | |
594 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
595 | pop_retrieve_flush (server); | |
596 | return (0); | |
597 | } | |
598 | ||
599 | while (! (ret = pop_retrieve_next (server, &fromserver))) | |
600 | { | |
601 | int linesize; | |
602 | ||
603 | if (! fromserver) | |
604 | { | |
605 | ptr[cp] = '\0'; | |
606 | return (ptr); | |
607 | } | |
608 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
609 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
610 | fromserver[4] == ' ') | |
611 | { | |
612 | if (++fromcount == 5) | |
613 | { | |
614 | bufsize += 5; | |
7d665945 | 615 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
616 | if (! ptr) |
617 | { | |
618 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
619 | pop_retrieve_flush (server); | |
620 | return (0); | |
621 | } | |
622 | fromcount = 0; | |
623 | } | |
624 | ptr[cp++] = '>'; | |
625 | } | |
626 | linesize = strlen (fromserver); | |
627 | bcopy (fromserver, &ptr[cp], linesize); | |
628 | cp += linesize; | |
629 | ptr[cp++] = '\n'; | |
630 | } | |
631 | ||
632 | if (ret) | |
633 | { | |
634 | free (ptr); | |
635 | return (0); | |
636 | } | |
637 | } | |
638 | ||
639 | int | |
640 | pop_retrieve_first (server, message, response) | |
641 | popserver server; | |
642 | int message; | |
643 | char **response; | |
644 | { | |
645 | sprintf (pop_error, "RETR %d", message); | |
646 | return (pop_multi_first (server, pop_error, response)); | |
647 | } | |
648 | ||
649 | int | |
650 | pop_retrieve_next (server, line) | |
651 | popserver server; | |
652 | char **line; | |
653 | { | |
654 | return (pop_multi_next (server, line)); | |
655 | } | |
656 | ||
657 | int | |
658 | pop_retrieve_flush (server) | |
659 | popserver server; | |
660 | { | |
661 | return (pop_multi_flush (server)); | |
662 | } | |
663 | ||
664 | int | |
665 | pop_top_first (server, message, lines, response) | |
666 | popserver server; | |
667 | int message, lines; | |
668 | char **response; | |
669 | { | |
670 | sprintf (pop_error, "TOP %d %d", message, lines); | |
671 | return (pop_multi_first (server, pop_error, response)); | |
672 | } | |
673 | ||
674 | int | |
675 | pop_top_next (server, line) | |
676 | popserver server; | |
677 | char **line; | |
678 | { | |
679 | return (pop_multi_next (server, line)); | |
680 | } | |
681 | ||
682 | int | |
683 | pop_top_flush (server) | |
684 | popserver server; | |
685 | { | |
686 | return (pop_multi_flush (server)); | |
687 | } | |
688 | ||
689 | int | |
690 | pop_multi_first (server, command, response) | |
691 | popserver server; | |
692 | char *command; | |
693 | char **response; | |
694 | { | |
695 | if (server->in_multi) | |
696 | { | |
697 | strcpy (pop_error, | |
698 | "Already in multi-line query in pop_multi_first"); | |
699 | return (-1); | |
700 | } | |
701 | ||
702 | if (sendline (server, command) || (! (*response = getline (server)))) | |
703 | { | |
704 | return (-1); | |
705 | } | |
706 | ||
707 | if (0 == strncmp (*response, "-ERR", 4)) | |
708 | { | |
709 | strncpy (pop_error, *response, ERROR_MAX); | |
710 | return (-1); | |
711 | } | |
712 | else if (0 == strncmp (*response, "+OK", 3)) | |
713 | { | |
714 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
715 | server->in_multi = 1; | |
716 | return (0); | |
717 | } | |
718 | else | |
719 | { | |
720 | strcpy (pop_error, | |
721 | "Unexpected response from server in pop_multi_first"); | |
722 | return (-1); | |
723 | } | |
724 | } | |
725 | ||
726 | int | |
727 | pop_multi_next (server, line) | |
728 | popserver server; | |
729 | char **line; | |
730 | { | |
731 | char *fromserver; | |
732 | ||
733 | if (! server->in_multi) | |
734 | { | |
735 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
736 | return (-1); | |
737 | } | |
738 | ||
739 | fromserver = getline (server); | |
740 | if (! fromserver) | |
741 | { | |
742 | return (-1); | |
743 | } | |
744 | ||
745 | if (fromserver[0] == '.') | |
746 | { | |
747 | if (! fromserver[1]) | |
748 | { | |
749 | *line = 0; | |
750 | server->in_multi = 0; | |
751 | return (0); | |
752 | } | |
753 | else | |
754 | { | |
755 | *line = fromserver + 1; | |
756 | return (0); | |
757 | } | |
758 | } | |
759 | else | |
760 | { | |
761 | *line = fromserver; | |
762 | return (0); | |
763 | } | |
764 | } | |
765 | ||
766 | int | |
767 | pop_multi_flush (server) | |
768 | popserver server; | |
769 | { | |
770 | char *line; | |
771 | ||
772 | if (! server->in_multi) | |
773 | { | |
774 | return (0); | |
775 | } | |
776 | ||
777 | while (! pop_multi_next (server, &line)) | |
778 | { | |
779 | if (! line) | |
780 | { | |
781 | return (0); | |
782 | } | |
783 | } | |
784 | ||
785 | return (-1); | |
786 | } | |
787 | ||
788 | /* Function: pop_delete | |
789 | * | |
790 | * Purpose: Delete a specified message. | |
791 | * | |
792 | * Arguments: | |
793 | * server Server from which to delete the message. | |
794 | * message Message to delete. | |
795 | * | |
796 | * Return value: 0 on success, non-zero with error in pop_error | |
797 | * otherwise. | |
798 | */ | |
799 | int | |
800 | pop_delete (server, message) | |
801 | popserver server; | |
802 | int message; | |
803 | { | |
804 | if (server->in_multi) | |
805 | { | |
806 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
807 | return (-1); | |
808 | } | |
809 | ||
810 | sprintf (pop_error, "DELE %d", message); | |
811 | ||
812 | if (sendline (server, pop_error) || getok (server)) | |
813 | return (-1); | |
814 | ||
815 | return (0); | |
816 | } | |
817 | ||
818 | /* | |
819 | * Function: pop_noop | |
820 | * | |
821 | * Purpose: Send a noop command to the server. | |
822 | * | |
823 | * Argument: | |
824 | * server The server to send to. | |
825 | * | |
826 | * Return value: 0 on success, non-zero with error in pop_error | |
827 | * otherwise. | |
828 | * | |
829 | * Side effects: Closes connection on error. | |
830 | */ | |
831 | int | |
832 | pop_noop (server) | |
833 | popserver server; | |
834 | { | |
835 | if (server->in_multi) | |
836 | { | |
837 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
838 | return (-1); | |
839 | } | |
840 | ||
841 | if (sendline (server, "NOOP") || getok (server)) | |
842 | return (-1); | |
843 | ||
844 | return (0); | |
845 | } | |
846 | ||
847 | /* | |
848 | * Function: pop_last | |
849 | * | |
850 | * Purpose: Find out the highest seen message from the server. | |
851 | * | |
852 | * Arguments: | |
853 | * server The server. | |
854 | * | |
855 | * Return value: If successful, the highest seen message, which is | |
856 | * greater than or equal to 0. Otherwise, a negative number with | |
857 | * the error explained in pop_error. | |
858 | * | |
859 | * Side effects: Closes the connection on error. | |
860 | */ | |
861 | int | |
862 | pop_last (server) | |
863 | popserver server; | |
864 | { | |
865 | char *fromserver; | |
866 | ||
867 | if (server->in_multi) | |
868 | { | |
869 | strcpy (pop_error, "In multi-line query in pop_last"); | |
870 | return (-1); | |
871 | } | |
872 | ||
873 | if (sendline (server, "LAST")) | |
874 | return (-1); | |
875 | ||
876 | if (! (fromserver = getline (server))) | |
877 | return (-1); | |
878 | ||
879 | if (! strncmp (fromserver, "-ERR", 4)) | |
880 | { | |
881 | strncpy (pop_error, fromserver, ERROR_MAX); | |
882 | return (-1); | |
883 | } | |
884 | else if (strncmp (fromserver, "+OK ", 4)) | |
885 | { | |
886 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
887 | pop_trash (server); | |
888 | return (-1); | |
889 | } | |
890 | else | |
891 | { | |
892 | return (atoi (&fromserver[4])); | |
893 | } | |
894 | } | |
895 | ||
896 | /* | |
897 | * Function: pop_reset | |
898 | * | |
899 | * Purpose: Reset the server to its initial connect state | |
900 | * | |
901 | * Arguments: | |
902 | * server The server. | |
903 | * | |
904 | * Return value: 0 for success, non-0 with error in pop_error | |
905 | * otherwise. | |
906 | * | |
907 | * Side effects: Closes the connection on error. | |
908 | */ | |
909 | int | |
910 | pop_reset (server) | |
911 | popserver server; | |
912 | { | |
913 | if (pop_retrieve_flush (server)) | |
914 | { | |
915 | return (-1); | |
916 | } | |
917 | ||
918 | if (sendline (server, "RSET") || getok (server)) | |
919 | return (-1); | |
920 | ||
921 | return (0); | |
922 | } | |
923 | ||
924 | /* | |
925 | * Function: pop_quit | |
926 | * | |
927 | * Purpose: Quit the connection to the server, | |
928 | * | |
929 | * Arguments: | |
930 | * server The server to quit. | |
931 | * | |
932 | * Return value: 0 for success, non-zero otherwise with error in | |
933 | * pop_error. | |
934 | * | |
8e6208c5 | 935 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
936 | * function is called, even if an error occurs. |
937 | */ | |
938 | int | |
939 | pop_quit (server) | |
940 | popserver server; | |
941 | { | |
942 | int ret = 0; | |
943 | ||
944 | if (server->file >= 0) | |
945 | { | |
946 | if (pop_retrieve_flush (server)) | |
947 | { | |
948 | ret = -1; | |
949 | } | |
950 | ||
951 | if (sendline (server, "QUIT") || getok (server)) | |
952 | { | |
953 | ret = -1; | |
954 | } | |
955 | ||
956 | close (server->file); | |
957 | } | |
958 | ||
959 | if (server->buffer) | |
960 | free (server->buffer); | |
961 | free ((char *) server); | |
962 | ||
963 | return (ret); | |
964 | } | |
965 | ||
c2668a61 RS |
966 | #ifdef WINDOWSNT |
967 | static int have_winsock = 0; | |
968 | #endif | |
969 | ||
9c0f2dac RS |
970 | /* |
971 | * Function: socket_connection | |
972 | * | |
973 | * Purpose: Opens the network connection with the mail host, without | |
974 | * doing any sort of I/O with it or anything. | |
975 | * | |
976 | * Arguments: | |
977 | * host The host to which to connect. | |
978 | * flags Option flags. | |
979 | * | |
980 | * Return value: A file descriptor indicating the connection, or -1 | |
981 | * indicating failure, in which case an error has been copied | |
982 | * into pop_error. | |
983 | */ | |
984 | static int | |
985 | socket_connection (host, flags) | |
986 | char *host; | |
987 | int flags; | |
988 | { | |
989 | struct hostent *hostent; | |
990 | struct servent *servent; | |
991 | struct sockaddr_in addr; | |
992 | char found_port = 0; | |
993 | char *service; | |
994 | int sock; | |
995 | #ifdef KERBEROS | |
996 | #ifdef KRB5 | |
997 | krb5_error_code rem; | |
998 | krb5_ccache ccdef; | |
999 | krb5_principal client, server; | |
1000 | krb5_error *err_ret; | |
1001 | register char *cp; | |
1002 | #else | |
1003 | KTEXT ticket; | |
1004 | MSG_DAT msg_data; | |
1005 | CREDENTIALS cred; | |
1006 | Key_schedule schedule; | |
1007 | int rem; | |
51a66525 | 1008 | char *realhost; |
9c0f2dac RS |
1009 | #endif /* KRB5 */ |
1010 | #endif /* KERBEROS */ | |
1011 | ||
1012 | int try_count = 0; | |
1013 | ||
c2668a61 RS |
1014 | #ifdef WINDOWSNT |
1015 | { | |
1016 | WSADATA winsockData; | |
1017 | if (WSAStartup (0x101, &winsockData) == 0) | |
1018 | have_winsock = 1; | |
1019 | } | |
1020 | #endif | |
1021 | ||
9c0f2dac RS |
1022 | do |
1023 | { | |
1024 | hostent = gethostbyname (host); | |
1025 | try_count++; | |
1026 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1027 | { | |
1028 | strcpy (pop_error, "Could not determine POP server's address"); | |
1029 | return (-1); | |
1030 | } | |
1031 | } while (! hostent); | |
1032 | ||
1033 | bzero ((char *) &addr, sizeof (addr)); | |
1034 | addr.sin_family = AF_INET; | |
1035 | ||
1036 | #ifdef KERBEROS | |
1037 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1038 | #else | |
1039 | service = POP_SERVICE; | |
1040 | #endif | |
1041 | ||
1042 | #ifdef HESIOD | |
1043 | if (! (flags & POP_NO_HESIOD)) | |
1044 | { | |
1045 | servent = hes_getservbyname (service, "tcp"); | |
1046 | if (servent) | |
1047 | { | |
1048 | addr.sin_port = servent->s_port; | |
1049 | found_port = 1; | |
1050 | } | |
1051 | } | |
1052 | #endif | |
1053 | if (! found_port) | |
1054 | { | |
1055 | servent = getservbyname (service, "tcp"); | |
1056 | if (servent) | |
1057 | { | |
1058 | addr.sin_port = servent->s_port; | |
1059 | } | |
1060 | else | |
1061 | { | |
1062 | #ifdef KERBEROS | |
1063 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1064 | POP_PORT : KPOP_PORT); | |
1065 | #else | |
1066 | addr.sin_port = htons (POP_PORT); | |
1067 | #endif | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | #define SOCKET_ERROR "Could not create socket for POP connection: " | |
1072 | ||
1073 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1074 | if (sock < 0) | |
1075 | { | |
1076 | strcpy (pop_error, SOCKET_ERROR); | |
1077 | strncat (pop_error, strerror (errno), | |
1078 | ERROR_MAX - sizeof (SOCKET_ERROR)); | |
1079 | return (-1); | |
1080 | ||
1081 | } | |
1082 | ||
1083 | while (*hostent->h_addr_list) | |
1084 | { | |
1085 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1086 | hostent->h_length); | |
1087 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1088 | break; | |
1089 | hostent->h_addr_list++; | |
1090 | } | |
1091 | ||
1092 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1093 | ||
1094 | if (! *hostent->h_addr_list) | |
1095 | { | |
de5c39cf | 1096 | CLOSESOCKET (sock); |
9c0f2dac RS |
1097 | strcpy (pop_error, CONNECT_ERROR); |
1098 | strncat (pop_error, strerror (errno), | |
1099 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1100 | return (-1); | |
1101 | ||
1102 | } | |
1103 | ||
1104 | #ifdef KERBEROS | |
1105 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1106 | if (! (flags & POP_NO_KERBEROS)) | |
1107 | { | |
1108 | #ifdef KRB5 | |
1109 | krb5_init_ets (); | |
1110 | ||
1111 | if (rem = krb5_cc_default (&ccdef)) | |
1112 | { | |
1113 | krb5error: | |
1114 | strcpy (pop_error, KRB_ERROR); | |
1115 | strncat (pop_error, error_message (rem), | |
1116 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1117 | CLOSESOCKET (sock); |
9c0f2dac RS |
1118 | return (-1); |
1119 | } | |
1120 | ||
1121 | if (rem = krb5_cc_get_principal (ccdef, &client)) | |
1122 | { | |
1123 | goto krb5error; | |
1124 | } | |
1125 | ||
1126 | for (cp = hostent->h_name; *cp; cp++) | |
1127 | { | |
1128 | if (isupper (*cp)) | |
1129 | { | |
1130 | *cp = tolower (*cp); | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE, | |
1135 | FALSE, &server)) | |
1136 | { | |
1137 | goto krb5error; | |
1138 | } | |
1139 | ||
1140 | rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server, | |
1141 | AP_OPTS_MUTUAL_REQUIRED, | |
1142 | 0, /* no checksum */ | |
1143 | 0, /* no creds, use ccache instead */ | |
1144 | ccdef, | |
1145 | 0, /* don't need seq # */ | |
1146 | 0, /* don't need subsession key */ | |
1147 | &err_ret, | |
1148 | 0); /* don't need reply */ | |
1149 | krb5_free_principal (server); | |
1150 | if (rem) | |
1151 | { | |
1152 | if (err_ret && err_ret->text.length) | |
1153 | { | |
1154 | strcpy (pop_error, KRB_ERROR); | |
1155 | strncat (pop_error, error_message (rem), | |
1156 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1157 | strncat (pop_error, " [server says '", | |
1158 | ERROR_MAX - strlen (pop_error) - 1); | |
1159 | strncat (pop_error, err_ret->text.data, | |
1160 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1161 | err_ret->text.length)); | |
1162 | strncat (pop_error, "']", | |
1163 | ERROR_MAX - strlen (pop_error) - 1); | |
1164 | } | |
1165 | else | |
1166 | { | |
1167 | strcpy (pop_error, KRB_ERROR); | |
1168 | strncat (pop_error, error_message (rem), | |
1169 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1170 | } | |
1171 | if (err_ret) | |
1172 | krb5_free_error (err_ret); | |
1173 | ||
de5c39cf | 1174 | CLOSESOCKET (sock); |
9c0f2dac RS |
1175 | return (-1); |
1176 | } | |
1177 | #else /* ! KRB5 */ | |
1178 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); | |
51a66525 CH |
1179 | realhost = strdup (hostent->h_name); |
1180 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, | |
1181 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1182 | (unsigned long) 0, &msg_data, &cred, schedule, |
1183 | (struct sockaddr_in *) 0, | |
1184 | (struct sockaddr_in *) 0, | |
1185 | "KPOPV0.1"); | |
1186 | free ((char *) ticket); | |
6a7eabe0 | 1187 | free (realhost); |
9c0f2dac RS |
1188 | if (rem != KSUCCESS) |
1189 | { | |
1190 | strcpy (pop_error, KRB_ERROR); | |
1191 | strncat (pop_error, krb_err_txt[rem], | |
1192 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1193 | CLOSESOCKET (sock); |
9c0f2dac RS |
1194 | return (-1); |
1195 | } | |
1196 | #endif /* KRB5 */ | |
1197 | } | |
1198 | #endif /* KERBEROS */ | |
1199 | ||
1200 | return (sock); | |
1201 | } /* socket_connection */ | |
1202 | ||
1203 | /* | |
1204 | * Function: getline | |
1205 | * | |
1206 | * Purpose: Get a line of text from the connection and return a | |
1207 | * pointer to it. The carriage return and linefeed at the end of | |
1208 | * the line are stripped, but periods at the beginnings of lines | |
1209 | * are NOT dealt with in any special way. | |
1210 | * | |
1211 | * Arguments: | |
1212 | * server The server from which to get the line of text. | |
1213 | * | |
1214 | * Returns: A non-null pointer if successful, or a null pointer on any | |
1215 | * error, with an error message copied into pop_error. | |
1216 | * | |
1217 | * Notes: The line returned is overwritten with each call to getline. | |
1218 | * | |
1219 | * Side effects: Closes the connection on error. | |
1220 | */ | |
1221 | static char * | |
1222 | getline (server) | |
1223 | popserver server; | |
1224 | { | |
1225 | #define GETLINE_ERROR "Error reading from server: " | |
1226 | ||
1227 | int ret; | |
b6606ad8 RS |
1228 | int search_offset = 0; |
1229 | ||
9c0f2dac RS |
1230 | if (server->data) |
1231 | { | |
8148baf9 | 1232 | char *cp = find_crlf (server->buffer + server->buffer_index); |
9c0f2dac RS |
1233 | if (cp) |
1234 | { | |
1235 | int found; | |
1236 | int data_used; | |
1237 | ||
1238 | found = server->buffer_index; | |
1239 | data_used = (cp + 2) - server->buffer - found; | |
1240 | ||
1241 | *cp = '\0'; /* terminate the string to be returned */ | |
1242 | server->data -= data_used; | |
1243 | server->buffer_index += data_used; | |
1244 | ||
1245 | if (pop_debug) | |
1246 | fprintf (stderr, "<<< %s\n", server->buffer + found); | |
1247 | return (server->buffer + found); | |
1248 | } | |
1249 | else | |
1250 | { | |
1251 | bcopy (server->buffer + server->buffer_index, | |
1252 | server->buffer, server->data); | |
b6606ad8 RS |
1253 | /* Record the fact that we've searched the data already in |
1254 | the buffer for a CRLF, so that when we search below, we | |
1255 | don't have to search the same data twice. There's a "- | |
1256 | 1" here to account for the fact that the last character | |
1257 | of the data we have may be the CR of a CRLF pair, of | |
1258 | which we haven't read the second half yet, so we may have | |
1259 | to search it again when we read more data. */ | |
1260 | search_offset = server->data - 1; | |
9c0f2dac RS |
1261 | server->buffer_index = 0; |
1262 | } | |
1263 | } | |
1264 | else | |
1265 | { | |
1266 | server->buffer_index = 0; | |
1267 | } | |
1268 | ||
1269 | while (1) | |
1270 | { | |
b6606ad8 RS |
1271 | /* There's a "- 1" here to leave room for the null that we put |
1272 | at the end of the read data below. We put the null there so | |
1273 | that find_crlf knows where to stop when we call it. */ | |
1274 | if (server->data == server->buffer_size - 1) | |
9c0f2dac RS |
1275 | { |
1276 | server->buffer_size += GETLINE_INCR; | |
7d665945 | 1277 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); |
9c0f2dac RS |
1278 | if (! server->buffer) |
1279 | { | |
1280 | strcpy (pop_error, "Out of memory in getline"); | |
1281 | pop_trash (server); | |
1282 | return (0); | |
1283 | } | |
1284 | } | |
de5c39cf | 1285 | ret = RECV (server->file, server->buffer + server->data, |
c2668a61 | 1286 | server->buffer_size - server->data - 1, 0); |
9c0f2dac RS |
1287 | if (ret < 0) |
1288 | { | |
1289 | strcpy (pop_error, GETLINE_ERROR); | |
1290 | strncat (pop_error, strerror (errno), | |
1291 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1292 | pop_trash (server); | |
1293 | return (0); | |
1294 | } | |
1295 | else if (ret == 0) | |
1296 | { | |
1297 | strcpy (pop_error, "Unexpected EOF from server in getline"); | |
1298 | pop_trash (server); | |
1299 | return (0); | |
1300 | } | |
1301 | else | |
1302 | { | |
7a481e50 | 1303 | char *cp; |
9c0f2dac | 1304 | server->data += ret; |
7a481e50 | 1305 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1306 | |
b6606ad8 | 1307 | cp = find_crlf (server->buffer + search_offset); |
9c0f2dac RS |
1308 | if (cp) |
1309 | { | |
1310 | int data_used = (cp + 2) - server->buffer; | |
1311 | *cp = '\0'; | |
1312 | server->data -= data_used; | |
1313 | server->buffer_index = data_used; | |
1314 | ||
1315 | if (pop_debug) | |
1316 | fprintf (stderr, "<<< %s\n", server->buffer); | |
1317 | return (server->buffer); | |
1318 | } | |
b6606ad8 | 1319 | search_offset += ret; |
9c0f2dac RS |
1320 | } |
1321 | } | |
1322 | ||
1323 | /* NOTREACHED */ | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | * Function: sendline | |
1328 | * | |
1329 | * Purpose: Sends a line of text to the POP server. The line of text | |
1330 | * passed into this function should NOT have the carriage return | |
1331 | * and linefeed on the end of it. Periods at beginnings of lines | |
1332 | * will NOT be treated specially by this function. | |
1333 | * | |
1334 | * Arguments: | |
1335 | * server The server to which to send the text. | |
1336 | * line The line of text to send. | |
1337 | * | |
1338 | * Return value: Upon successful completion, a value of 0 will be | |
1339 | * returned. Otherwise, a non-zero value will be returned, and | |
1340 | * an error will be copied into pop_error. | |
1341 | * | |
1342 | * Side effects: Closes the connection on error. | |
1343 | */ | |
1344 | static int | |
1345 | sendline (server, line) | |
1346 | popserver server; | |
1347 | char *line; | |
1348 | { | |
1349 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1350 | int ret; | |
1351 | ||
1352 | ret = fullwrite (server->file, line, strlen (line)); | |
1353 | if (ret >= 0) | |
1354 | { /* 0 indicates that a blank line was written */ | |
1355 | ret = fullwrite (server->file, "\r\n", 2); | |
1356 | } | |
1357 | ||
1358 | if (ret < 0) | |
1359 | { | |
1360 | pop_trash (server); | |
1361 | strcpy (pop_error, SENDLINE_ERROR); | |
1362 | strncat (pop_error, strerror (errno), | |
1363 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1364 | return (ret); | |
1365 | } | |
1366 | ||
1367 | if (pop_debug) | |
1368 | fprintf (stderr, ">>> %s\n", line); | |
1369 | ||
1370 | return (0); | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | * Procedure: fullwrite | |
1375 | * | |
1376 | * Purpose: Just like write, but keeps trying until the entire string | |
1377 | * has been written. | |
1378 | * | |
1379 | * Return value: Same as write. Pop_error is not set. | |
1380 | */ | |
1381 | static int | |
1382 | fullwrite (fd, buf, nbytes) | |
1383 | int fd; | |
1384 | char *buf; | |
1385 | int nbytes; | |
1386 | { | |
1387 | char *cp; | |
1388 | int ret; | |
1389 | ||
1390 | cp = buf; | |
de5c39cf | 1391 | while ((ret = SEND (fd, cp, nbytes, 0)) > 0) |
9c0f2dac RS |
1392 | { |
1393 | cp += ret; | |
1394 | nbytes -= ret; | |
1395 | } | |
1396 | ||
1397 | return (ret); | |
1398 | } | |
1399 | ||
1400 | /* | |
1401 | * Procedure getok | |
1402 | * | |
1403 | * Purpose: Reads a line from the server. If the return indicator is | |
1404 | * positive, return with a zero exit status. If not, return with | |
1405 | * a negative exit status. | |
1406 | * | |
1407 | * Arguments: | |
1408 | * server The server to read from. | |
1409 | * | |
1410 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1411 | * | |
8e6208c5 | 1412 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1413 | */ |
1414 | static int | |
1415 | getok (server) | |
1416 | popserver server; | |
1417 | { | |
1418 | char *fromline; | |
1419 | ||
1420 | if (! (fromline = getline (server))) | |
1421 | { | |
1422 | return (-1); | |
1423 | } | |
1424 | ||
1425 | if (! strncmp (fromline, "+OK", 3)) | |
1426 | return (0); | |
1427 | else if (! strncmp (fromline, "-ERR", 4)) | |
1428 | { | |
1429 | strncpy (pop_error, fromline, ERROR_MAX); | |
1430 | pop_error[ERROR_MAX-1] = '\0'; | |
1431 | return (-1); | |
1432 | } | |
1433 | else | |
1434 | { | |
1435 | strcpy (pop_error, | |
1436 | "Unexpected response from server; expecting +OK or -ERR"); | |
1437 | pop_trash (server); | |
1438 | return (-1); | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | #if 0 | |
1443 | /* | |
1444 | * Function: gettermination | |
1445 | * | |
1446 | * Purpose: Gets the next line and verifies that it is a termination | |
1447 | * line (nothing but a dot). | |
1448 | * | |
1449 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1450 | * | |
1451 | * Side effects: Closes the connection on error. | |
1452 | */ | |
1453 | static int | |
1454 | gettermination (server) | |
1455 | popserver server; | |
1456 | { | |
1457 | char *fromserver; | |
1458 | ||
1459 | fromserver = getline (server); | |
1460 | if (! fromserver) | |
1461 | return (-1); | |
1462 | ||
1463 | if (strcmp (fromserver, ".")) | |
1464 | { | |
1465 | strcpy (pop_error, | |
1466 | "Unexpected response from server in gettermination"); | |
1467 | pop_trash (server); | |
1468 | return (-1); | |
1469 | } | |
1470 | ||
1471 | return (0); | |
1472 | } | |
1473 | #endif | |
1474 | ||
1475 | /* | |
1476 | * Function pop_close | |
1477 | * | |
1478 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1479 | * preserve any changes that were made and a "QUIT" command to | |
1480 | * try to get the server to quit, but ignoring any responses that | |
1481 | * are received. | |
1482 | * | |
8e6208c5 | 1483 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1484 | * Changes made to the maildrop since the session was started (or |
1485 | * since the last pop_reset) may be lost. | |
1486 | */ | |
1487 | void | |
1488 | pop_close (server) | |
1489 | popserver server; | |
1490 | { | |
1491 | pop_trash (server); | |
1492 | free ((char *) server); | |
1493 | ||
1494 | return; | |
1495 | } | |
1496 | ||
1497 | /* | |
1498 | * Function: pop_trash | |
1499 | * | |
1500 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1501 | * memory associated with the server. It is legal to call | |
1502 | * pop_close or pop_quit after this function has been called. | |
1503 | */ | |
1504 | static void | |
1505 | pop_trash (server) | |
1506 | popserver server; | |
1507 | { | |
1508 | if (server->file >= 0) | |
1509 | { | |
c2668a61 RS |
1510 | /* avoid recursion; sendline can call pop_trash */ |
1511 | if (server->trash_started) | |
1512 | return; | |
1513 | server->trash_started = 1; | |
de5c39cf | 1514 | |
9c0f2dac RS |
1515 | sendline (server, "RSET"); |
1516 | sendline (server, "QUIT"); | |
1517 | ||
de5c39cf | 1518 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1519 | server->file = -1; |
1520 | if (server->buffer) | |
1521 | { | |
1522 | free (server->buffer); | |
1523 | server->buffer = 0; | |
1524 | } | |
1525 | } | |
c2668a61 RS |
1526 | |
1527 | #ifdef WINDOWSNT | |
1528 | if (have_winsock) | |
1529 | WSACleanup (); | |
1530 | #endif | |
9c0f2dac RS |
1531 | } |
1532 | ||
8148baf9 RS |
1533 | /* Return a pointer to the first CRLF in IN_STRING, |
1534 | or 0 if it does not contain one. */ | |
9c0f2dac RS |
1535 | |
1536 | static char * | |
8148baf9 RS |
1537 | find_crlf (in_string) |
1538 | char *in_string; | |
9c0f2dac | 1539 | { |
8148baf9 | 1540 | while (1) |
9c0f2dac | 1541 | { |
8148baf9 RS |
1542 | if (! *in_string) |
1543 | return (0); | |
1544 | else if (*in_string == '\r') | |
1545 | { | |
1546 | if (*++in_string == '\n') | |
1547 | return (in_string - 1); | |
1548 | } | |
1549 | else | |
1550 | in_string++; | |
9c0f2dac | 1551 | } |
8148baf9 | 1552 | /* NOTREACHED */ |
9c0f2dac RS |
1553 | } |
1554 | ||
1555 | #endif /* MAIL_USE_POP */ |