Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
a27738b6 | 2 | Copyright (c) 1991, 1993, 1996, 1997 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> | |
a27738b6 RS |
75 | #ifdef STDC_HEADERS |
76 | #include <string.h> | |
020d3015 KH |
77 | #define index strchr |
78 | #endif | |
79 | #ifdef STDC_HEADERS | |
80 | #include <stdlib.h> | |
81 | #endif | |
82 | #ifdef HAVE_UNISTD_H | |
83 | #include <unistd.h> | |
a27738b6 | 84 | #endif |
625ad89f | 85 | |
9c0f2dac | 86 | #ifdef KERBEROS |
a27738b6 RS |
87 | # ifdef HAVE_KRB5_H |
88 | # include <krb5.h> | |
89 | # endif | |
90 | # ifdef HAVE_DES_H | |
91 | # include <des.h> | |
92 | # else | |
93 | # ifdef HAVE_KERBEROSIV_DES_H | |
94 | # include <kerberosIV/des.h> | |
95 | # else | |
96 | # ifdef HAVE_KERBEROS_DES_H | |
97 | # include <kerberos/des.h> | |
98 | # endif | |
99 | # endif | |
100 | # endif | |
101 | # ifdef HAVE_KRB_H | |
102 | # include <krb.h> | |
103 | # else | |
104 | # ifdef HAVE_KERBEROSIV_KRB_H | |
105 | # include <kerberosIV/krb.h> | |
106 | # else | |
107 | # ifdef HAVE_KERBEROS_KRB_H | |
108 | # include <kerberos/krb.h> | |
109 | # endif | |
110 | # endif | |
111 | # endif | |
112 | # ifdef HAVE_COM_ERR_H | |
113 | # include <com_err.h> | |
114 | # endif | |
8148baf9 | 115 | #endif /* KERBEROS */ |
9c0f2dac | 116 | |
8148baf9 | 117 | #ifdef KERBEROS |
a27738b6 | 118 | #ifndef KERBEROS5 |
9c0f2dac | 119 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
120 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
121 | struct sockaddr_in *, struct sockaddr_in *, | |
122 | char * */); | |
9c0f2dac | 123 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 124 | #endif /* ! KERBEROS5 */ |
8148baf9 | 125 | #endif /* KERBEROS */ |
9c0f2dac | 126 | |
c2668a61 | 127 | #ifndef WINDOWSNT |
8148baf9 | 128 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
129 | extern int h_errno; |
130 | #endif | |
c2668a61 | 131 | #endif |
9c0f2dac RS |
132 | |
133 | static int socket_connection (/* char *, int */); | |
134 | static char *getline (/* popserver */); | |
135 | static int sendline (/* popserver, char * */); | |
136 | static int fullwrite (/* int, char *, int */); | |
137 | static int getok (/* popserver */); | |
138 | #if 0 | |
139 | static int gettermination (/* popserver */); | |
140 | #endif | |
141 | static void pop_trash (/* popserver */); | |
8148baf9 | 142 | static char *find_crlf (/* char * */); |
7a481e50 | 143 | |
9c0f2dac RS |
144 | #define ERROR_MAX 80 /* a pretty arbitrary size */ |
145 | #define POP_PORT 110 | |
146 | #define KPOP_PORT 1109 | |
c2668a61 RS |
147 | #ifdef WINDOWSNT |
148 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ | |
149 | #else | |
9c0f2dac | 150 | #define POP_SERVICE "pop" |
c2668a61 | 151 | #endif |
9c0f2dac | 152 | #ifdef KERBEROS |
9c0f2dac RS |
153 | #define KPOP_SERVICE "kpop" |
154 | #endif | |
9c0f2dac RS |
155 | |
156 | char pop_error[ERROR_MAX]; | |
157 | int pop_debug = 0; | |
158 | ||
159 | #ifndef min | |
160 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
161 | #endif | |
162 | ||
163 | /* | |
164 | * Function: pop_open (char *host, char *username, char *password, | |
165 | * int flags) | |
166 | * | |
167 | * Purpose: Establishes a connection with a post-office server, and | |
168 | * completes the authorization portion of the session. | |
169 | * | |
170 | * Arguments: | |
171 | * host The server host with which the connection should be | |
172 | * established. Optional. If omitted, internal | |
173 | * heuristics will be used to determine the server host, | |
174 | * if possible. | |
175 | * username | |
176 | * The username of the mail-drop to access. Optional. | |
177 | * If omitted, internal heuristics will be used to | |
178 | * determine the username, if possible. | |
179 | * password | |
180 | * The password to use for authorization. If omitted, | |
181 | * internal heuristics will be used to determine the | |
182 | * password, if possible. | |
183 | * flags A bit mask containing flags controlling certain | |
184 | * functions of the routine. Valid flags are defined in | |
185 | * the file pop.h | |
186 | * | |
187 | * Return value: Upon successful establishment of a connection, a | |
188 | * non-null popserver will be returned. Otherwise, null will be | |
189 | * returned, and the string variable pop_error will contain an | |
190 | * explanation of the error. | |
191 | */ | |
192 | popserver | |
193 | pop_open (host, username, password, flags) | |
194 | char *host; | |
195 | char *username; | |
196 | char *password; | |
197 | int flags; | |
198 | { | |
199 | int sock; | |
200 | popserver server; | |
201 | ||
202 | /* Determine the user name */ | |
203 | if (! username) | |
204 | { | |
205 | username = getenv ("USER"); | |
206 | if (! (username && *username)) | |
207 | { | |
208 | username = getlogin (); | |
209 | if (! (username && *username)) | |
210 | { | |
211 | struct passwd *passwd; | |
212 | passwd = getpwuid (getuid ()); | |
213 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
214 | { | |
215 | username = passwd->pw_name; | |
216 | } | |
217 | else | |
218 | { | |
219 | strcpy (pop_error, "Could not determine username"); | |
220 | return (0); | |
221 | } | |
222 | } | |
223 | } | |
224 | } | |
225 | ||
226 | /* | |
227 | * Determine the mail host. | |
228 | */ | |
229 | ||
230 | if (! host) | |
231 | { | |
232 | host = getenv ("MAILHOST"); | |
233 | } | |
234 | ||
235 | #ifdef HESIOD | |
236 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
237 | { | |
238 | struct hes_postoffice *office; | |
239 | office = hes_getmailhost (username); | |
240 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
241 | && office->po_name && *office->po_name && office->po_host | |
242 | && *office->po_host) | |
243 | { | |
244 | host = office->po_host; | |
245 | username = office->po_name; | |
246 | } | |
247 | } | |
248 | #endif | |
249 | ||
250 | #ifdef MAILHOST | |
251 | if (! host) | |
252 | { | |
253 | host = MAILHOST; | |
254 | } | |
255 | #endif | |
256 | ||
257 | if (! host) | |
258 | { | |
259 | strcpy (pop_error, "Could not determine POP server"); | |
260 | return (0); | |
261 | } | |
262 | ||
263 | /* Determine the password */ | |
264 | #ifdef KERBEROS | |
265 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
266 | #else | |
267 | #define DONT_NEED_PASSWORD 0 | |
268 | #endif | |
269 | ||
270 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
271 | { | |
272 | if (! (flags & POP_NO_GETPASS)) | |
273 | { | |
274 | password = getpass ("Enter POP password:"); | |
275 | } | |
276 | if (! password) | |
277 | { | |
278 | strcpy (pop_error, "Could not determine POP password"); | |
279 | return (0); | |
280 | } | |
281 | } | |
282 | if (password) | |
283 | flags |= POP_NO_KERBEROS; | |
284 | else | |
285 | password = username; | |
286 | ||
287 | sock = socket_connection (host, flags); | |
288 | if (sock == -1) | |
289 | return (0); | |
290 | ||
291 | server = (popserver) malloc (sizeof (struct _popserver)); | |
292 | if (! server) | |
293 | { | |
294 | strcpy (pop_error, "Out of memory in pop_open"); | |
295 | return (0); | |
296 | } | |
297 | server->buffer = (char *) malloc (GETLINE_MIN); | |
298 | if (! server->buffer) | |
299 | { | |
300 | strcpy (pop_error, "Out of memory in pop_open"); | |
301 | free ((char *) server); | |
302 | return (0); | |
303 | } | |
304 | ||
305 | server->file = sock; | |
306 | server->data = 0; | |
307 | server->buffer_index = 0; | |
308 | server->buffer_size = GETLINE_MIN; | |
309 | server->in_multi = 0; | |
c2668a61 | 310 | server->trash_started = 0; |
9c0f2dac RS |
311 | |
312 | if (getok (server)) | |
313 | return (0); | |
314 | ||
315 | /* | |
316 | * I really shouldn't use the pop_error variable like this, but.... | |
317 | */ | |
318 | if (strlen (username) > ERROR_MAX - 6) | |
319 | { | |
320 | pop_close (server); | |
321 | strcpy (pop_error, | |
322 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
323 | return (0); | |
324 | } | |
325 | sprintf (pop_error, "USER %s", username); | |
326 | ||
327 | if (sendline (server, pop_error) || getok (server)) | |
328 | { | |
329 | return (0); | |
330 | } | |
331 | ||
332 | if (strlen (password) > ERROR_MAX - 6) | |
333 | { | |
334 | pop_close (server); | |
335 | strcpy (pop_error, | |
336 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
337 | return (0); | |
338 | } | |
339 | sprintf (pop_error, "PASS %s", password); | |
340 | ||
341 | if (sendline (server, pop_error) || getok (server)) | |
342 | { | |
343 | return (0); | |
344 | } | |
345 | ||
346 | return (server); | |
347 | } | |
348 | ||
349 | /* | |
350 | * Function: pop_stat | |
351 | * | |
352 | * Purpose: Issue the STAT command to the server and return (in the | |
353 | * value parameters) the number of messages in the maildrop and | |
354 | * the total size of the maildrop. | |
355 | * | |
356 | * Return value: 0 on success, or non-zero with an error in pop_error | |
357 | * in failure. | |
358 | * | |
359 | * Side effects: On failure, may make further operations on the | |
360 | * connection impossible. | |
361 | */ | |
362 | int | |
363 | pop_stat (server, count, size) | |
364 | popserver server; | |
365 | int *count; | |
366 | int *size; | |
367 | { | |
368 | char *fromserver; | |
369 | ||
370 | if (server->in_multi) | |
371 | { | |
372 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
373 | return (-1); | |
374 | } | |
375 | ||
376 | if (sendline (server, "STAT") || (! (fromserver = getline (server)))) | |
377 | return (-1); | |
378 | ||
379 | if (strncmp (fromserver, "+OK ", 4)) | |
380 | { | |
381 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
382 | { | |
383 | strncpy (pop_error, fromserver, ERROR_MAX); | |
384 | } | |
385 | else | |
386 | { | |
387 | strcpy (pop_error, | |
388 | "Unexpected response from POP server in pop_stat"); | |
389 | pop_trash (server); | |
390 | } | |
391 | return (-1); | |
392 | } | |
393 | ||
394 | *count = atoi (&fromserver[4]); | |
395 | ||
396 | fromserver = index (&fromserver[4], ' '); | |
397 | if (! fromserver) | |
398 | { | |
399 | strcpy (pop_error, | |
400 | "Badly formatted response from server in pop_stat"); | |
401 | pop_trash (server); | |
402 | return (-1); | |
403 | } | |
404 | ||
405 | *size = atoi (fromserver + 1); | |
406 | ||
407 | return (0); | |
408 | } | |
409 | ||
410 | /* | |
411 | * Function: pop_list | |
412 | * | |
413 | * Purpose: Performs the POP "list" command and returns (in value | |
414 | * parameters) two malloc'd zero-terminated arrays -- one of | |
415 | * message IDs, and a parallel one of sizes. | |
416 | * | |
417 | * Arguments: | |
418 | * server The pop connection to talk to. | |
419 | * message The number of the one message about which to get | |
420 | * information, or 0 to get information about all | |
421 | * messages. | |
422 | * | |
423 | * Return value: 0 on success, non-zero with error in pop_error on | |
424 | * failure. | |
425 | * | |
426 | * Side effects: On failure, may make further operations on the | |
427 | * connection impossible. | |
428 | */ | |
429 | int | |
430 | pop_list (server, message, IDs, sizes) | |
431 | popserver server; | |
432 | int message; | |
433 | int **IDs; | |
434 | int **sizes; | |
435 | { | |
436 | int how_many, i; | |
437 | char *fromserver; | |
438 | ||
439 | if (server->in_multi) | |
440 | { | |
441 | strcpy (pop_error, "In multi-line query in pop_list"); | |
442 | return (-1); | |
443 | } | |
444 | ||
445 | if (message) | |
446 | how_many = 1; | |
447 | else | |
448 | { | |
449 | int count, size; | |
450 | if (pop_stat (server, &count, &size)) | |
451 | return (-1); | |
452 | how_many = count; | |
453 | } | |
454 | ||
455 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
456 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
457 | if (! (*IDs && *sizes)) | |
458 | { | |
459 | strcpy (pop_error, "Out of memory in pop_list"); | |
460 | return (-1); | |
461 | } | |
462 | ||
463 | if (message) | |
464 | { | |
465 | sprintf (pop_error, "LIST %d", message); | |
466 | if (sendline (server, pop_error)) | |
467 | { | |
468 | free ((char *) *IDs); | |
469 | free ((char *) *sizes); | |
470 | return (-1); | |
471 | } | |
472 | if (! (fromserver = getline (server))) | |
473 | { | |
474 | free ((char *) *IDs); | |
475 | free ((char *) *sizes); | |
476 | return (-1); | |
477 | } | |
478 | if (strncmp (fromserver, "+OK ", 4)) | |
479 | { | |
480 | if (! strncmp (fromserver, "-ERR", 4)) | |
481 | strncpy (pop_error, fromserver, ERROR_MAX); | |
482 | else | |
483 | { | |
484 | strcpy (pop_error, | |
485 | "Unexpected response from server in pop_list"); | |
486 | pop_trash (server); | |
487 | } | |
488 | free ((char *) *IDs); | |
489 | free ((char *) *sizes); | |
490 | return (-1); | |
491 | } | |
492 | (*IDs)[0] = atoi (&fromserver[4]); | |
493 | fromserver = index (&fromserver[4], ' '); | |
494 | if (! fromserver) | |
495 | { | |
496 | strcpy (pop_error, | |
497 | "Badly formatted response from server in pop_list"); | |
498 | pop_trash (server); | |
499 | free ((char *) *IDs); | |
500 | free ((char *) *sizes); | |
501 | return (-1); | |
502 | } | |
503 | (*sizes)[0] = atoi (fromserver); | |
504 | (*IDs)[1] = (*sizes)[1] = 0; | |
505 | return (0); | |
506 | } | |
507 | else | |
508 | { | |
509 | if (pop_multi_first (server, "LIST", &fromserver)) | |
510 | { | |
511 | free ((char *) *IDs); | |
512 | free ((char *) *sizes); | |
513 | return (-1); | |
514 | } | |
515 | for (i = 0; i < how_many; i++) | |
516 | { | |
517 | if (pop_multi_next (server, &fromserver)) | |
518 | { | |
519 | free ((char *) *IDs); | |
520 | free ((char *) *sizes); | |
521 | return (-1); | |
522 | } | |
523 | (*IDs)[i] = atoi (fromserver); | |
524 | fromserver = index (fromserver, ' '); | |
525 | if (! fromserver) | |
526 | { | |
527 | strcpy (pop_error, | |
528 | "Badly formatted response from server in pop_list"); | |
529 | free ((char *) *IDs); | |
530 | free ((char *) *sizes); | |
531 | pop_trash (server); | |
532 | return (-1); | |
533 | } | |
534 | (*sizes)[i] = atoi (fromserver); | |
535 | } | |
536 | if (pop_multi_next (server, &fromserver)) | |
537 | { | |
538 | free ((char *) *IDs); | |
539 | free ((char *) *sizes); | |
540 | return (-1); | |
541 | } | |
542 | else if (fromserver) | |
543 | { | |
544 | strcpy (pop_error, | |
545 | "Too many response lines from server in pop_list"); | |
546 | free ((char *) *IDs); | |
547 | free ((char *) *sizes); | |
548 | return (-1); | |
549 | } | |
550 | (*IDs)[i] = (*sizes)[i] = 0; | |
551 | return (0); | |
552 | } | |
553 | } | |
554 | ||
555 | /* | |
556 | * Function: pop_retrieve | |
557 | * | |
558 | * Purpose: Retrieve a specified message from the maildrop. | |
559 | * | |
560 | * Arguments: | |
561 | * server The server to retrieve from. | |
562 | * message The message number to retrieve. | |
563 | * markfrom | |
564 | * If true, then mark the string "From " at the beginning | |
565 | * of lines with '>'. | |
566 | * | |
567 | * Return value: A string pointing to the message, if successful, or | |
568 | * null with pop_error set if not. | |
569 | * | |
570 | * Side effects: May kill connection on error. | |
571 | */ | |
572 | char * | |
573 | pop_retrieve (server, message, markfrom) | |
574 | popserver server; | |
575 | int message; | |
576 | int markfrom; | |
577 | { | |
578 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
579 | char *ptr, *fromserver; | |
580 | int ret; | |
581 | ||
582 | if (server->in_multi) | |
583 | { | |
584 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
585 | return (0); | |
586 | } | |
587 | ||
588 | if (pop_list (server, message, &IDs, &sizes)) | |
589 | return (0); | |
590 | ||
591 | if (pop_retrieve_first (server, message, &fromserver)) | |
592 | { | |
593 | return (0); | |
594 | } | |
595 | ||
596 | /* | |
597 | * The "5" below is an arbitrary constant -- I assume that if | |
598 | * there are "From" lines in the text to be marked, there | |
599 | * probably won't be more than 5 of them. If there are, I | |
600 | * allocate more space for them below. | |
601 | */ | |
602 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 603 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
604 | free ((char *) IDs); |
605 | free ((char *) sizes); | |
606 | ||
607 | if (! ptr) | |
608 | { | |
609 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
610 | pop_retrieve_flush (server); | |
611 | return (0); | |
612 | } | |
613 | ||
614 | while (! (ret = pop_retrieve_next (server, &fromserver))) | |
615 | { | |
616 | int linesize; | |
617 | ||
618 | if (! fromserver) | |
619 | { | |
620 | ptr[cp] = '\0'; | |
621 | return (ptr); | |
622 | } | |
623 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
624 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
625 | fromserver[4] == ' ') | |
626 | { | |
627 | if (++fromcount == 5) | |
628 | { | |
629 | bufsize += 5; | |
7d665945 | 630 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
631 | if (! ptr) |
632 | { | |
633 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
634 | pop_retrieve_flush (server); | |
635 | return (0); | |
636 | } | |
637 | fromcount = 0; | |
638 | } | |
639 | ptr[cp++] = '>'; | |
640 | } | |
641 | linesize = strlen (fromserver); | |
642 | bcopy (fromserver, &ptr[cp], linesize); | |
643 | cp += linesize; | |
644 | ptr[cp++] = '\n'; | |
645 | } | |
646 | ||
647 | if (ret) | |
648 | { | |
649 | free (ptr); | |
650 | return (0); | |
651 | } | |
652 | } | |
653 | ||
654 | int | |
655 | pop_retrieve_first (server, message, response) | |
656 | popserver server; | |
657 | int message; | |
658 | char **response; | |
659 | { | |
660 | sprintf (pop_error, "RETR %d", message); | |
661 | return (pop_multi_first (server, pop_error, response)); | |
662 | } | |
663 | ||
664 | int | |
665 | pop_retrieve_next (server, line) | |
666 | popserver server; | |
667 | char **line; | |
668 | { | |
669 | return (pop_multi_next (server, line)); | |
670 | } | |
671 | ||
672 | int | |
673 | pop_retrieve_flush (server) | |
674 | popserver server; | |
675 | { | |
676 | return (pop_multi_flush (server)); | |
677 | } | |
678 | ||
679 | int | |
680 | pop_top_first (server, message, lines, response) | |
681 | popserver server; | |
682 | int message, lines; | |
683 | char **response; | |
684 | { | |
685 | sprintf (pop_error, "TOP %d %d", message, lines); | |
686 | return (pop_multi_first (server, pop_error, response)); | |
687 | } | |
688 | ||
689 | int | |
690 | pop_top_next (server, line) | |
691 | popserver server; | |
692 | char **line; | |
693 | { | |
694 | return (pop_multi_next (server, line)); | |
695 | } | |
696 | ||
697 | int | |
698 | pop_top_flush (server) | |
699 | popserver server; | |
700 | { | |
701 | return (pop_multi_flush (server)); | |
702 | } | |
703 | ||
704 | int | |
705 | pop_multi_first (server, command, response) | |
706 | popserver server; | |
707 | char *command; | |
708 | char **response; | |
709 | { | |
710 | if (server->in_multi) | |
711 | { | |
712 | strcpy (pop_error, | |
713 | "Already in multi-line query in pop_multi_first"); | |
714 | return (-1); | |
715 | } | |
716 | ||
717 | if (sendline (server, command) || (! (*response = getline (server)))) | |
718 | { | |
719 | return (-1); | |
720 | } | |
721 | ||
722 | if (0 == strncmp (*response, "-ERR", 4)) | |
723 | { | |
724 | strncpy (pop_error, *response, ERROR_MAX); | |
725 | return (-1); | |
726 | } | |
727 | else if (0 == strncmp (*response, "+OK", 3)) | |
728 | { | |
729 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
730 | server->in_multi = 1; | |
731 | return (0); | |
732 | } | |
733 | else | |
734 | { | |
735 | strcpy (pop_error, | |
736 | "Unexpected response from server in pop_multi_first"); | |
737 | return (-1); | |
738 | } | |
739 | } | |
740 | ||
741 | int | |
742 | pop_multi_next (server, line) | |
743 | popserver server; | |
744 | char **line; | |
745 | { | |
746 | char *fromserver; | |
747 | ||
748 | if (! server->in_multi) | |
749 | { | |
750 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
751 | return (-1); | |
752 | } | |
753 | ||
754 | fromserver = getline (server); | |
755 | if (! fromserver) | |
756 | { | |
757 | return (-1); | |
758 | } | |
759 | ||
760 | if (fromserver[0] == '.') | |
761 | { | |
762 | if (! fromserver[1]) | |
763 | { | |
764 | *line = 0; | |
765 | server->in_multi = 0; | |
766 | return (0); | |
767 | } | |
768 | else | |
769 | { | |
770 | *line = fromserver + 1; | |
771 | return (0); | |
772 | } | |
773 | } | |
774 | else | |
775 | { | |
776 | *line = fromserver; | |
777 | return (0); | |
778 | } | |
779 | } | |
780 | ||
781 | int | |
782 | pop_multi_flush (server) | |
783 | popserver server; | |
784 | { | |
785 | char *line; | |
786 | ||
787 | if (! server->in_multi) | |
788 | { | |
789 | return (0); | |
790 | } | |
791 | ||
792 | while (! pop_multi_next (server, &line)) | |
793 | { | |
794 | if (! line) | |
795 | { | |
796 | return (0); | |
797 | } | |
798 | } | |
799 | ||
800 | return (-1); | |
801 | } | |
802 | ||
803 | /* Function: pop_delete | |
804 | * | |
805 | * Purpose: Delete a specified message. | |
806 | * | |
807 | * Arguments: | |
808 | * server Server from which to delete the message. | |
809 | * message Message to delete. | |
810 | * | |
811 | * Return value: 0 on success, non-zero with error in pop_error | |
812 | * otherwise. | |
813 | */ | |
814 | int | |
815 | pop_delete (server, message) | |
816 | popserver server; | |
817 | int message; | |
818 | { | |
819 | if (server->in_multi) | |
820 | { | |
821 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
822 | return (-1); | |
823 | } | |
824 | ||
825 | sprintf (pop_error, "DELE %d", message); | |
826 | ||
827 | if (sendline (server, pop_error) || getok (server)) | |
828 | return (-1); | |
829 | ||
830 | return (0); | |
831 | } | |
832 | ||
833 | /* | |
834 | * Function: pop_noop | |
835 | * | |
836 | * Purpose: Send a noop command to the server. | |
837 | * | |
838 | * Argument: | |
839 | * server The server to send to. | |
840 | * | |
841 | * Return value: 0 on success, non-zero with error in pop_error | |
842 | * otherwise. | |
843 | * | |
844 | * Side effects: Closes connection on error. | |
845 | */ | |
846 | int | |
847 | pop_noop (server) | |
848 | popserver server; | |
849 | { | |
850 | if (server->in_multi) | |
851 | { | |
852 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
853 | return (-1); | |
854 | } | |
855 | ||
856 | if (sendline (server, "NOOP") || getok (server)) | |
857 | return (-1); | |
858 | ||
859 | return (0); | |
860 | } | |
861 | ||
862 | /* | |
863 | * Function: pop_last | |
864 | * | |
865 | * Purpose: Find out the highest seen message from the server. | |
866 | * | |
867 | * Arguments: | |
868 | * server The server. | |
869 | * | |
870 | * Return value: If successful, the highest seen message, which is | |
871 | * greater than or equal to 0. Otherwise, a negative number with | |
872 | * the error explained in pop_error. | |
873 | * | |
874 | * Side effects: Closes the connection on error. | |
875 | */ | |
876 | int | |
877 | pop_last (server) | |
878 | popserver server; | |
879 | { | |
880 | char *fromserver; | |
881 | ||
882 | if (server->in_multi) | |
883 | { | |
884 | strcpy (pop_error, "In multi-line query in pop_last"); | |
885 | return (-1); | |
886 | } | |
887 | ||
888 | if (sendline (server, "LAST")) | |
889 | return (-1); | |
890 | ||
891 | if (! (fromserver = getline (server))) | |
892 | return (-1); | |
893 | ||
894 | if (! strncmp (fromserver, "-ERR", 4)) | |
895 | { | |
896 | strncpy (pop_error, fromserver, ERROR_MAX); | |
897 | return (-1); | |
898 | } | |
899 | else if (strncmp (fromserver, "+OK ", 4)) | |
900 | { | |
901 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
902 | pop_trash (server); | |
903 | return (-1); | |
904 | } | |
905 | else | |
906 | { | |
907 | return (atoi (&fromserver[4])); | |
908 | } | |
909 | } | |
910 | ||
911 | /* | |
912 | * Function: pop_reset | |
913 | * | |
914 | * Purpose: Reset the server to its initial connect state | |
915 | * | |
916 | * Arguments: | |
917 | * server The server. | |
918 | * | |
919 | * Return value: 0 for success, non-0 with error in pop_error | |
920 | * otherwise. | |
921 | * | |
922 | * Side effects: Closes the connection on error. | |
923 | */ | |
924 | int | |
925 | pop_reset (server) | |
926 | popserver server; | |
927 | { | |
928 | if (pop_retrieve_flush (server)) | |
929 | { | |
930 | return (-1); | |
931 | } | |
932 | ||
933 | if (sendline (server, "RSET") || getok (server)) | |
934 | return (-1); | |
935 | ||
936 | return (0); | |
937 | } | |
938 | ||
939 | /* | |
940 | * Function: pop_quit | |
941 | * | |
942 | * Purpose: Quit the connection to the server, | |
943 | * | |
944 | * Arguments: | |
945 | * server The server to quit. | |
946 | * | |
947 | * Return value: 0 for success, non-zero otherwise with error in | |
948 | * pop_error. | |
949 | * | |
8e6208c5 | 950 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
951 | * function is called, even if an error occurs. |
952 | */ | |
953 | int | |
954 | pop_quit (server) | |
955 | popserver server; | |
956 | { | |
957 | int ret = 0; | |
958 | ||
959 | if (server->file >= 0) | |
960 | { | |
961 | if (pop_retrieve_flush (server)) | |
962 | { | |
963 | ret = -1; | |
964 | } | |
965 | ||
966 | if (sendline (server, "QUIT") || getok (server)) | |
967 | { | |
968 | ret = -1; | |
969 | } | |
970 | ||
971 | close (server->file); | |
972 | } | |
973 | ||
974 | if (server->buffer) | |
975 | free (server->buffer); | |
976 | free ((char *) server); | |
977 | ||
978 | return (ret); | |
979 | } | |
980 | ||
c2668a61 RS |
981 | #ifdef WINDOWSNT |
982 | static int have_winsock = 0; | |
983 | #endif | |
984 | ||
9c0f2dac RS |
985 | /* |
986 | * Function: socket_connection | |
987 | * | |
988 | * Purpose: Opens the network connection with the mail host, without | |
989 | * doing any sort of I/O with it or anything. | |
990 | * | |
991 | * Arguments: | |
992 | * host The host to which to connect. | |
993 | * flags Option flags. | |
994 | * | |
995 | * Return value: A file descriptor indicating the connection, or -1 | |
996 | * indicating failure, in which case an error has been copied | |
997 | * into pop_error. | |
998 | */ | |
999 | static int | |
1000 | socket_connection (host, flags) | |
1001 | char *host; | |
1002 | int flags; | |
1003 | { | |
1004 | struct hostent *hostent; | |
1005 | struct servent *servent; | |
1006 | struct sockaddr_in addr; | |
1007 | char found_port = 0; | |
1008 | char *service; | |
1009 | int sock; | |
1010 | #ifdef KERBEROS | |
a27738b6 | 1011 | #ifdef KERBEROS5 |
9c0f2dac | 1012 | krb5_error_code rem; |
a27738b6 RS |
1013 | krb5_context kcontext = 0; |
1014 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
1015 | krb5_ccache ccdef; |
1016 | krb5_principal client, server; | |
1017 | krb5_error *err_ret; | |
1018 | register char *cp; | |
1019 | #else | |
1020 | KTEXT ticket; | |
1021 | MSG_DAT msg_data; | |
1022 | CREDENTIALS cred; | |
1023 | Key_schedule schedule; | |
1024 | int rem; | |
51a66525 | 1025 | char *realhost; |
a27738b6 | 1026 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1027 | #endif /* KERBEROS */ |
1028 | ||
1029 | int try_count = 0; | |
1030 | ||
c2668a61 RS |
1031 | #ifdef WINDOWSNT |
1032 | { | |
1033 | WSADATA winsockData; | |
1034 | if (WSAStartup (0x101, &winsockData) == 0) | |
1035 | have_winsock = 1; | |
1036 | } | |
1037 | #endif | |
1038 | ||
9c0f2dac RS |
1039 | do |
1040 | { | |
1041 | hostent = gethostbyname (host); | |
1042 | try_count++; | |
1043 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1044 | { | |
1045 | strcpy (pop_error, "Could not determine POP server's address"); | |
1046 | return (-1); | |
1047 | } | |
1048 | } while (! hostent); | |
1049 | ||
1050 | bzero ((char *) &addr, sizeof (addr)); | |
1051 | addr.sin_family = AF_INET; | |
1052 | ||
1053 | #ifdef KERBEROS | |
1054 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1055 | #else | |
1056 | service = POP_SERVICE; | |
1057 | #endif | |
1058 | ||
1059 | #ifdef HESIOD | |
1060 | if (! (flags & POP_NO_HESIOD)) | |
1061 | { | |
1062 | servent = hes_getservbyname (service, "tcp"); | |
1063 | if (servent) | |
1064 | { | |
1065 | addr.sin_port = servent->s_port; | |
1066 | found_port = 1; | |
1067 | } | |
1068 | } | |
1069 | #endif | |
1070 | if (! found_port) | |
1071 | { | |
1072 | servent = getservbyname (service, "tcp"); | |
1073 | if (servent) | |
1074 | { | |
1075 | addr.sin_port = servent->s_port; | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | #ifdef KERBEROS | |
1080 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1081 | POP_PORT : KPOP_PORT); | |
1082 | #else | |
1083 | addr.sin_port = htons (POP_PORT); | |
1084 | #endif | |
1085 | } | |
1086 | } | |
1087 | ||
a27738b6 | 1088 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1089 | |
1090 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1091 | if (sock < 0) | |
1092 | { | |
a27738b6 | 1093 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1094 | strncat (pop_error, strerror (errno), |
a27738b6 | 1095 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac RS |
1096 | return (-1); |
1097 | ||
1098 | } | |
1099 | ||
1100 | while (*hostent->h_addr_list) | |
1101 | { | |
1102 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1103 | hostent->h_length); | |
1104 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1105 | break; | |
1106 | hostent->h_addr_list++; | |
1107 | } | |
1108 | ||
1109 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1110 | ||
1111 | if (! *hostent->h_addr_list) | |
1112 | { | |
de5c39cf | 1113 | CLOSESOCKET (sock); |
9c0f2dac RS |
1114 | strcpy (pop_error, CONNECT_ERROR); |
1115 | strncat (pop_error, strerror (errno), | |
1116 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1117 | return (-1); | |
1118 | ||
1119 | } | |
1120 | ||
1121 | #ifdef KERBEROS | |
1122 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1123 | if (! (flags & POP_NO_KERBEROS)) | |
1124 | { | |
a27738b6 RS |
1125 | #ifdef KERBEROS5 |
1126 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1127 | { |
1128 | krb5error: | |
a27738b6 RS |
1129 | if (auth_context) |
1130 | krb5_auth_con_free (kcontext, auth_context); | |
1131 | if (kcontext) | |
1132 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1133 | strcpy (pop_error, KRB_ERROR); |
1134 | strncat (pop_error, error_message (rem), | |
1135 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1136 | CLOSESOCKET (sock); |
9c0f2dac RS |
1137 | return (-1); |
1138 | } | |
1139 | ||
a27738b6 RS |
1140 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1141 | goto krb5error; | |
1142 | ||
1143 | if (rem = krb5_cc_default (kcontext, &ccdef)) | |
1144 | goto krb5error; | |
1145 | ||
1146 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1147 | goto krb5error; | |
9c0f2dac RS |
1148 | |
1149 | for (cp = hostent->h_name; *cp; cp++) | |
1150 | { | |
1151 | if (isupper (*cp)) | |
1152 | { | |
1153 | *cp = tolower (*cp); | |
1154 | } | |
1155 | } | |
1156 | ||
a27738b6 RS |
1157 | if (rem = krb5_sname_to_principal (kcontext, hostent->h_name, |
1158 | POP_SERVICE, FALSE, &server)) | |
1159 | goto krb5error; | |
9c0f2dac | 1160 | |
a27738b6 RS |
1161 | rem = krb5_sendauth (kcontext, &auth_context, |
1162 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1163 | AP_OPTS_MUTUAL_REQUIRED, |
1164 | 0, /* no checksum */ | |
1165 | 0, /* no creds, use ccache instead */ | |
1166 | ccdef, | |
9c0f2dac | 1167 | &err_ret, |
a27738b6 | 1168 | 0, /* don't need subsession key */ |
9c0f2dac | 1169 | 0); /* don't need reply */ |
a27738b6 | 1170 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1171 | if (rem) |
1172 | { | |
1173 | if (err_ret && err_ret->text.length) | |
1174 | { | |
1175 | strcpy (pop_error, KRB_ERROR); | |
1176 | strncat (pop_error, error_message (rem), | |
1177 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1178 | strncat (pop_error, " [server says '", | |
1179 | ERROR_MAX - strlen (pop_error) - 1); | |
1180 | strncat (pop_error, err_ret->text.data, | |
1181 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1182 | err_ret->text.length)); | |
1183 | strncat (pop_error, "']", | |
1184 | ERROR_MAX - strlen (pop_error) - 1); | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | strcpy (pop_error, KRB_ERROR); | |
1189 | strncat (pop_error, error_message (rem), | |
1190 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1191 | } | |
1192 | if (err_ret) | |
a27738b6 RS |
1193 | krb5_free_error (kcontext, err_ret); |
1194 | krb5_auth_con_free (kcontext, auth_context); | |
1195 | krb5_free_context (kcontext); | |
9c0f2dac | 1196 | |
de5c39cf | 1197 | CLOSESOCKET (sock); |
9c0f2dac RS |
1198 | return (-1); |
1199 | } | |
a27738b6 | 1200 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1201 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1202 | realhost = strdup (hostent->h_name); |
1203 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, | |
1204 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1205 | (unsigned long) 0, &msg_data, &cred, schedule, |
1206 | (struct sockaddr_in *) 0, | |
1207 | (struct sockaddr_in *) 0, | |
1208 | "KPOPV0.1"); | |
1209 | free ((char *) ticket); | |
6a7eabe0 | 1210 | free (realhost); |
9c0f2dac RS |
1211 | if (rem != KSUCCESS) |
1212 | { | |
1213 | strcpy (pop_error, KRB_ERROR); | |
1214 | strncat (pop_error, krb_err_txt[rem], | |
1215 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1216 | CLOSESOCKET (sock); |
9c0f2dac RS |
1217 | return (-1); |
1218 | } | |
a27738b6 | 1219 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1220 | } |
1221 | #endif /* KERBEROS */ | |
1222 | ||
1223 | return (sock); | |
1224 | } /* socket_connection */ | |
1225 | ||
1226 | /* | |
1227 | * Function: getline | |
1228 | * | |
1229 | * Purpose: Get a line of text from the connection and return a | |
1230 | * pointer to it. The carriage return and linefeed at the end of | |
1231 | * the line are stripped, but periods at the beginnings of lines | |
1232 | * are NOT dealt with in any special way. | |
1233 | * | |
1234 | * Arguments: | |
1235 | * server The server from which to get the line of text. | |
1236 | * | |
1237 | * Returns: A non-null pointer if successful, or a null pointer on any | |
1238 | * error, with an error message copied into pop_error. | |
1239 | * | |
1240 | * Notes: The line returned is overwritten with each call to getline. | |
1241 | * | |
1242 | * Side effects: Closes the connection on error. | |
1243 | */ | |
1244 | static char * | |
1245 | getline (server) | |
1246 | popserver server; | |
1247 | { | |
1248 | #define GETLINE_ERROR "Error reading from server: " | |
1249 | ||
1250 | int ret; | |
b6606ad8 RS |
1251 | int search_offset = 0; |
1252 | ||
9c0f2dac RS |
1253 | if (server->data) |
1254 | { | |
8148baf9 | 1255 | char *cp = find_crlf (server->buffer + server->buffer_index); |
9c0f2dac RS |
1256 | if (cp) |
1257 | { | |
1258 | int found; | |
1259 | int data_used; | |
1260 | ||
1261 | found = server->buffer_index; | |
1262 | data_used = (cp + 2) - server->buffer - found; | |
1263 | ||
1264 | *cp = '\0'; /* terminate the string to be returned */ | |
1265 | server->data -= data_used; | |
1266 | server->buffer_index += data_used; | |
1267 | ||
1268 | if (pop_debug) | |
1269 | fprintf (stderr, "<<< %s\n", server->buffer + found); | |
1270 | return (server->buffer + found); | |
1271 | } | |
1272 | else | |
1273 | { | |
1274 | bcopy (server->buffer + server->buffer_index, | |
1275 | server->buffer, server->data); | |
b6606ad8 RS |
1276 | /* Record the fact that we've searched the data already in |
1277 | the buffer for a CRLF, so that when we search below, we | |
1278 | don't have to search the same data twice. There's a "- | |
1279 | 1" here to account for the fact that the last character | |
1280 | of the data we have may be the CR of a CRLF pair, of | |
1281 | which we haven't read the second half yet, so we may have | |
1282 | to search it again when we read more data. */ | |
1283 | search_offset = server->data - 1; | |
9c0f2dac RS |
1284 | server->buffer_index = 0; |
1285 | } | |
1286 | } | |
1287 | else | |
1288 | { | |
1289 | server->buffer_index = 0; | |
1290 | } | |
1291 | ||
1292 | while (1) | |
1293 | { | |
b6606ad8 RS |
1294 | /* There's a "- 1" here to leave room for the null that we put |
1295 | at the end of the read data below. We put the null there so | |
1296 | that find_crlf knows where to stop when we call it. */ | |
1297 | if (server->data == server->buffer_size - 1) | |
9c0f2dac RS |
1298 | { |
1299 | server->buffer_size += GETLINE_INCR; | |
7d665945 | 1300 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); |
9c0f2dac RS |
1301 | if (! server->buffer) |
1302 | { | |
1303 | strcpy (pop_error, "Out of memory in getline"); | |
1304 | pop_trash (server); | |
1305 | return (0); | |
1306 | } | |
1307 | } | |
de5c39cf | 1308 | ret = RECV (server->file, server->buffer + server->data, |
c2668a61 | 1309 | server->buffer_size - server->data - 1, 0); |
9c0f2dac RS |
1310 | if (ret < 0) |
1311 | { | |
1312 | strcpy (pop_error, GETLINE_ERROR); | |
1313 | strncat (pop_error, strerror (errno), | |
1314 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1315 | pop_trash (server); | |
1316 | return (0); | |
1317 | } | |
1318 | else if (ret == 0) | |
1319 | { | |
1320 | strcpy (pop_error, "Unexpected EOF from server in getline"); | |
1321 | pop_trash (server); | |
1322 | return (0); | |
1323 | } | |
1324 | else | |
1325 | { | |
7a481e50 | 1326 | char *cp; |
9c0f2dac | 1327 | server->data += ret; |
7a481e50 | 1328 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1329 | |
b6606ad8 | 1330 | cp = find_crlf (server->buffer + search_offset); |
9c0f2dac RS |
1331 | if (cp) |
1332 | { | |
1333 | int data_used = (cp + 2) - server->buffer; | |
1334 | *cp = '\0'; | |
1335 | server->data -= data_used; | |
1336 | server->buffer_index = data_used; | |
1337 | ||
1338 | if (pop_debug) | |
1339 | fprintf (stderr, "<<< %s\n", server->buffer); | |
1340 | return (server->buffer); | |
1341 | } | |
a8f44d07 RS |
1342 | /* As above, the "- 1" here is to account for the fact that |
1343 | we may have read a CR without its accompanying LF. */ | |
1344 | search_offset += ret - 1; | |
9c0f2dac RS |
1345 | } |
1346 | } | |
1347 | ||
1348 | /* NOTREACHED */ | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * Function: sendline | |
1353 | * | |
1354 | * Purpose: Sends a line of text to the POP server. The line of text | |
1355 | * passed into this function should NOT have the carriage return | |
1356 | * and linefeed on the end of it. Periods at beginnings of lines | |
1357 | * will NOT be treated specially by this function. | |
1358 | * | |
1359 | * Arguments: | |
1360 | * server The server to which to send the text. | |
1361 | * line The line of text to send. | |
1362 | * | |
1363 | * Return value: Upon successful completion, a value of 0 will be | |
1364 | * returned. Otherwise, a non-zero value will be returned, and | |
1365 | * an error will be copied into pop_error. | |
1366 | * | |
1367 | * Side effects: Closes the connection on error. | |
1368 | */ | |
1369 | static int | |
1370 | sendline (server, line) | |
1371 | popserver server; | |
1372 | char *line; | |
1373 | { | |
1374 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1375 | int ret; | |
1376 | ||
1377 | ret = fullwrite (server->file, line, strlen (line)); | |
1378 | if (ret >= 0) | |
1379 | { /* 0 indicates that a blank line was written */ | |
1380 | ret = fullwrite (server->file, "\r\n", 2); | |
1381 | } | |
1382 | ||
1383 | if (ret < 0) | |
1384 | { | |
1385 | pop_trash (server); | |
1386 | strcpy (pop_error, SENDLINE_ERROR); | |
1387 | strncat (pop_error, strerror (errno), | |
1388 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1389 | return (ret); | |
1390 | } | |
1391 | ||
1392 | if (pop_debug) | |
1393 | fprintf (stderr, ">>> %s\n", line); | |
1394 | ||
1395 | return (0); | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Procedure: fullwrite | |
1400 | * | |
1401 | * Purpose: Just like write, but keeps trying until the entire string | |
1402 | * has been written. | |
1403 | * | |
1404 | * Return value: Same as write. Pop_error is not set. | |
1405 | */ | |
1406 | static int | |
1407 | fullwrite (fd, buf, nbytes) | |
1408 | int fd; | |
1409 | char *buf; | |
1410 | int nbytes; | |
1411 | { | |
1412 | char *cp; | |
1413 | int ret; | |
1414 | ||
1415 | cp = buf; | |
de5c39cf | 1416 | while ((ret = SEND (fd, cp, nbytes, 0)) > 0) |
9c0f2dac RS |
1417 | { |
1418 | cp += ret; | |
1419 | nbytes -= ret; | |
1420 | } | |
1421 | ||
1422 | return (ret); | |
1423 | } | |
1424 | ||
1425 | /* | |
1426 | * Procedure getok | |
1427 | * | |
1428 | * Purpose: Reads a line from the server. If the return indicator is | |
1429 | * positive, return with a zero exit status. If not, return with | |
1430 | * a negative exit status. | |
1431 | * | |
1432 | * Arguments: | |
1433 | * server The server to read from. | |
1434 | * | |
1435 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1436 | * | |
8e6208c5 | 1437 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1438 | */ |
1439 | static int | |
1440 | getok (server) | |
1441 | popserver server; | |
1442 | { | |
1443 | char *fromline; | |
1444 | ||
1445 | if (! (fromline = getline (server))) | |
1446 | { | |
1447 | return (-1); | |
1448 | } | |
1449 | ||
1450 | if (! strncmp (fromline, "+OK", 3)) | |
1451 | return (0); | |
1452 | else if (! strncmp (fromline, "-ERR", 4)) | |
1453 | { | |
1454 | strncpy (pop_error, fromline, ERROR_MAX); | |
1455 | pop_error[ERROR_MAX-1] = '\0'; | |
1456 | return (-1); | |
1457 | } | |
1458 | else | |
1459 | { | |
1460 | strcpy (pop_error, | |
1461 | "Unexpected response from server; expecting +OK or -ERR"); | |
1462 | pop_trash (server); | |
1463 | return (-1); | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | #if 0 | |
1468 | /* | |
1469 | * Function: gettermination | |
1470 | * | |
1471 | * Purpose: Gets the next line and verifies that it is a termination | |
1472 | * line (nothing but a dot). | |
1473 | * | |
1474 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1475 | * | |
1476 | * Side effects: Closes the connection on error. | |
1477 | */ | |
1478 | static int | |
1479 | gettermination (server) | |
1480 | popserver server; | |
1481 | { | |
1482 | char *fromserver; | |
1483 | ||
1484 | fromserver = getline (server); | |
1485 | if (! fromserver) | |
1486 | return (-1); | |
1487 | ||
1488 | if (strcmp (fromserver, ".")) | |
1489 | { | |
1490 | strcpy (pop_error, | |
1491 | "Unexpected response from server in gettermination"); | |
1492 | pop_trash (server); | |
1493 | return (-1); | |
1494 | } | |
1495 | ||
1496 | return (0); | |
1497 | } | |
1498 | #endif | |
1499 | ||
1500 | /* | |
1501 | * Function pop_close | |
1502 | * | |
1503 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1504 | * preserve any changes that were made and a "QUIT" command to | |
1505 | * try to get the server to quit, but ignoring any responses that | |
1506 | * are received. | |
1507 | * | |
8e6208c5 | 1508 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1509 | * Changes made to the maildrop since the session was started (or |
1510 | * since the last pop_reset) may be lost. | |
1511 | */ | |
1512 | void | |
1513 | pop_close (server) | |
1514 | popserver server; | |
1515 | { | |
1516 | pop_trash (server); | |
1517 | free ((char *) server); | |
1518 | ||
1519 | return; | |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * Function: pop_trash | |
1524 | * | |
1525 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1526 | * memory associated with the server. It is legal to call | |
1527 | * pop_close or pop_quit after this function has been called. | |
1528 | */ | |
1529 | static void | |
1530 | pop_trash (server) | |
1531 | popserver server; | |
1532 | { | |
1533 | if (server->file >= 0) | |
1534 | { | |
c2668a61 RS |
1535 | /* avoid recursion; sendline can call pop_trash */ |
1536 | if (server->trash_started) | |
1537 | return; | |
1538 | server->trash_started = 1; | |
de5c39cf | 1539 | |
9c0f2dac RS |
1540 | sendline (server, "RSET"); |
1541 | sendline (server, "QUIT"); | |
1542 | ||
de5c39cf | 1543 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1544 | server->file = -1; |
1545 | if (server->buffer) | |
1546 | { | |
1547 | free (server->buffer); | |
1548 | server->buffer = 0; | |
1549 | } | |
1550 | } | |
c2668a61 RS |
1551 | |
1552 | #ifdef WINDOWSNT | |
1553 | if (have_winsock) | |
1554 | WSACleanup (); | |
1555 | #endif | |
9c0f2dac RS |
1556 | } |
1557 | ||
8148baf9 RS |
1558 | /* Return a pointer to the first CRLF in IN_STRING, |
1559 | or 0 if it does not contain one. */ | |
9c0f2dac RS |
1560 | |
1561 | static char * | |
8148baf9 RS |
1562 | find_crlf (in_string) |
1563 | char *in_string; | |
9c0f2dac | 1564 | { |
8148baf9 | 1565 | while (1) |
9c0f2dac | 1566 | { |
8148baf9 RS |
1567 | if (! *in_string) |
1568 | return (0); | |
1569 | else if (*in_string == '\r') | |
1570 | { | |
1571 | if (*++in_string == '\n') | |
1572 | return (in_string - 1); | |
1573 | } | |
1574 | else | |
1575 | in_string++; | |
9c0f2dac | 1576 | } |
8148baf9 | 1577 | /* NOTREACHED */ |
9c0f2dac RS |
1578 | } |
1579 | ||
1580 | #endif /* MAIL_USE_POP */ |