Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
4ee9629e | 2 | Copyright (c) 1991, 1993, 1996, 1997, 1999 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 */ | |
2f8fe2f4 | 24 | #include <config.h> |
8148baf9 RS |
25 | #else |
26 | #define MAIL_USE_POP | |
27 | #endif | |
c9c3d8f6 | 28 | |
8148baf9 RS |
29 | #ifdef MAIL_USE_POP |
30 | ||
9c0f2dac | 31 | #include <sys/types.h> |
c2668a61 RS |
32 | #ifdef WINDOWSNT |
33 | #include "ntlib.h" | |
34 | #include <winsock.h> | |
35 | #undef SOCKET_ERROR | |
de5c39cf RS |
36 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
37 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
38 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 39 | #else |
9c0f2dac RS |
40 | #include <netinet/in.h> |
41 | #include <sys/socket.h> | |
de5c39cf RS |
42 | #define RECV(s,buf,len,flags) read(s,buf,len) |
43 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
44 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 45 | #endif |
9c0f2dac | 46 | #include <pop.h> |
625ad89f | 47 | |
9c0f2dac RS |
48 | #ifdef sun |
49 | #include <malloc.h> | |
8148baf9 | 50 | #endif /* sun */ |
625ad89f | 51 | |
9c0f2dac RS |
52 | #ifdef HESIOD |
53 | #include <hesiod.h> | |
54 | /* | |
55 | * It really shouldn't be necessary to put this declaration here, but | |
56 | * the version of hesiod.h that Athena has installed in release 7.2 | |
57 | * doesn't declare this function; I don't know if the 7.3 version of | |
58 | * hesiod.h does. | |
59 | */ | |
60 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
61 | #endif | |
625ad89f | 62 | |
9c0f2dac | 63 | #include <pwd.h> |
9c0f2dac RS |
64 | #include <netdb.h> |
65 | #include <errno.h> | |
66 | #include <stdio.h> | |
a27738b6 RS |
67 | #ifdef STDC_HEADERS |
68 | #include <string.h> | |
020d3015 KH |
69 | #define index strchr |
70 | #endif | |
020d3015 KH |
71 | #ifdef HAVE_UNISTD_H |
72 | #include <unistd.h> | |
a27738b6 | 73 | #endif |
625ad89f | 74 | |
9c0f2dac | 75 | #ifdef KERBEROS |
a27738b6 RS |
76 | # ifdef HAVE_KRB5_H |
77 | # include <krb5.h> | |
78 | # endif | |
79 | # ifdef HAVE_DES_H | |
80 | # include <des.h> | |
81 | # else | |
82 | # ifdef HAVE_KERBEROSIV_DES_H | |
83 | # include <kerberosIV/des.h> | |
84 | # else | |
85 | # ifdef HAVE_KERBEROS_DES_H | |
86 | # include <kerberos/des.h> | |
87 | # endif | |
88 | # endif | |
89 | # endif | |
90 | # ifdef HAVE_KRB_H | |
91 | # include <krb.h> | |
92 | # else | |
93 | # ifdef HAVE_KERBEROSIV_KRB_H | |
94 | # include <kerberosIV/krb.h> | |
95 | # else | |
96 | # ifdef HAVE_KERBEROS_KRB_H | |
97 | # include <kerberos/krb.h> | |
98 | # endif | |
99 | # endif | |
100 | # endif | |
101 | # ifdef HAVE_COM_ERR_H | |
102 | # include <com_err.h> | |
103 | # endif | |
8148baf9 | 104 | #endif /* KERBEROS */ |
9c0f2dac | 105 | |
8148baf9 | 106 | #ifdef KERBEROS |
a27738b6 | 107 | #ifndef KERBEROS5 |
9c0f2dac | 108 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
109 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
110 | struct sockaddr_in *, struct sockaddr_in *, | |
111 | char * */); | |
9c0f2dac | 112 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 113 | #endif /* ! KERBEROS5 */ |
8148baf9 | 114 | #endif /* KERBEROS */ |
9c0f2dac | 115 | |
c2668a61 | 116 | #ifndef WINDOWSNT |
8148baf9 | 117 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
118 | extern int h_errno; |
119 | #endif | |
c2668a61 | 120 | #endif |
9c0f2dac | 121 | |
d89d0243 KH |
122 | #ifndef _P |
123 | # ifdef __STDC__ | |
124 | # define _P(a) a | |
125 | # else | |
126 | # define _P(a) () | |
127 | # endif /* __STDC__ */ | |
128 | #endif /* ! __P */ | |
129 | ||
130 | static int socket_connection _P((char *, int)); | |
60b0a379 | 131 | static int pop_getline _P((popserver, char **)); |
d89d0243 KH |
132 | static int sendline _P((popserver, char *)); |
133 | static int fullwrite _P((int, char *, int)); | |
134 | static int getok _P((popserver)); | |
9c0f2dac | 135 | #if 0 |
d89d0243 | 136 | static int gettermination _P((popserver)); |
9c0f2dac | 137 | #endif |
d89d0243 KH |
138 | static void pop_trash _P((popserver)); |
139 | static char *find_crlf _P((char *, int)); | |
7a481e50 | 140 | |
5bf244f1 | 141 | #define ERROR_MAX 160 /* a pretty arbitrary size, but needs |
a47bf648 DL |
142 | to be bigger than the original |
143 | value of 80 */ | |
9c0f2dac RS |
144 | #define POP_PORT 110 |
145 | #define KPOP_PORT 1109 | |
c2668a61 | 146 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ |
9c0f2dac | 147 | #ifdef KERBEROS |
9c0f2dac RS |
148 | #define KPOP_SERVICE "kpop" |
149 | #endif | |
9c0f2dac RS |
150 | |
151 | char pop_error[ERROR_MAX]; | |
152 | int pop_debug = 0; | |
153 | ||
154 | #ifndef min | |
155 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
156 | #endif | |
157 | ||
158 | /* | |
159 | * Function: pop_open (char *host, char *username, char *password, | |
160 | * int flags) | |
161 | * | |
162 | * Purpose: Establishes a connection with a post-office server, and | |
163 | * completes the authorization portion of the session. | |
164 | * | |
165 | * Arguments: | |
166 | * host The server host with which the connection should be | |
167 | * established. Optional. If omitted, internal | |
168 | * heuristics will be used to determine the server host, | |
169 | * if possible. | |
170 | * username | |
171 | * The username of the mail-drop to access. Optional. | |
172 | * If omitted, internal heuristics will be used to | |
173 | * determine the username, if possible. | |
174 | * password | |
175 | * The password to use for authorization. If omitted, | |
176 | * internal heuristics will be used to determine the | |
177 | * password, if possible. | |
178 | * flags A bit mask containing flags controlling certain | |
179 | * functions of the routine. Valid flags are defined in | |
180 | * the file pop.h | |
181 | * | |
182 | * Return value: Upon successful establishment of a connection, a | |
183 | * non-null popserver will be returned. Otherwise, null will be | |
184 | * returned, and the string variable pop_error will contain an | |
185 | * explanation of the error. | |
186 | */ | |
187 | popserver | |
188 | pop_open (host, username, password, flags) | |
189 | char *host; | |
190 | char *username; | |
191 | char *password; | |
192 | int flags; | |
193 | { | |
194 | int sock; | |
195 | popserver server; | |
196 | ||
197 | /* Determine the user name */ | |
198 | if (! username) | |
199 | { | |
200 | username = getenv ("USER"); | |
201 | if (! (username && *username)) | |
202 | { | |
203 | username = getlogin (); | |
204 | if (! (username && *username)) | |
205 | { | |
206 | struct passwd *passwd; | |
207 | passwd = getpwuid (getuid ()); | |
208 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
209 | { | |
210 | username = passwd->pw_name; | |
211 | } | |
212 | else | |
213 | { | |
214 | strcpy (pop_error, "Could not determine username"); | |
215 | return (0); | |
216 | } | |
217 | } | |
218 | } | |
219 | } | |
220 | ||
221 | /* | |
222 | * Determine the mail host. | |
223 | */ | |
224 | ||
225 | if (! host) | |
226 | { | |
227 | host = getenv ("MAILHOST"); | |
228 | } | |
229 | ||
230 | #ifdef HESIOD | |
231 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
232 | { | |
233 | struct hes_postoffice *office; | |
234 | office = hes_getmailhost (username); | |
235 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
236 | && office->po_name && *office->po_name && office->po_host | |
237 | && *office->po_host) | |
238 | { | |
239 | host = office->po_host; | |
240 | username = office->po_name; | |
241 | } | |
242 | } | |
243 | #endif | |
244 | ||
245 | #ifdef MAILHOST | |
246 | if (! host) | |
247 | { | |
248 | host = MAILHOST; | |
249 | } | |
250 | #endif | |
251 | ||
252 | if (! host) | |
253 | { | |
254 | strcpy (pop_error, "Could not determine POP server"); | |
255 | return (0); | |
256 | } | |
257 | ||
258 | /* Determine the password */ | |
bbcac09c RS |
259 | #ifdef KERBEROS |
260 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
9c0f2dac | 261 | #else |
bbcac09c | 262 | #define DONT_NEED_PASSWORD 0 |
9c0f2dac RS |
263 | #endif |
264 | ||
265 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
266 | { | |
267 | if (! (flags & POP_NO_GETPASS)) | |
268 | { | |
269 | password = getpass ("Enter POP password:"); | |
270 | } | |
271 | if (! password) | |
272 | { | |
273 | strcpy (pop_error, "Could not determine POP password"); | |
274 | return (0); | |
275 | } | |
276 | } | |
277 | if (password) | |
bbcac09c | 278 | flags |= POP_NO_KERBEROS; |
9c0f2dac RS |
279 | else |
280 | password = username; | |
281 | ||
282 | sock = socket_connection (host, flags); | |
283 | if (sock == -1) | |
284 | return (0); | |
285 | ||
286 | server = (popserver) malloc (sizeof (struct _popserver)); | |
287 | if (! server) | |
288 | { | |
289 | strcpy (pop_error, "Out of memory in pop_open"); | |
290 | return (0); | |
291 | } | |
292 | server->buffer = (char *) malloc (GETLINE_MIN); | |
293 | if (! server->buffer) | |
294 | { | |
295 | strcpy (pop_error, "Out of memory in pop_open"); | |
296 | free ((char *) server); | |
297 | return (0); | |
298 | } | |
80b2cbf2 | 299 | |
9c0f2dac RS |
300 | server->file = sock; |
301 | server->data = 0; | |
302 | server->buffer_index = 0; | |
303 | server->buffer_size = GETLINE_MIN; | |
304 | server->in_multi = 0; | |
c2668a61 | 305 | server->trash_started = 0; |
9c0f2dac RS |
306 | |
307 | if (getok (server)) | |
308 | return (0); | |
309 | ||
310 | /* | |
311 | * I really shouldn't use the pop_error variable like this, but.... | |
312 | */ | |
313 | if (strlen (username) > ERROR_MAX - 6) | |
314 | { | |
315 | pop_close (server); | |
316 | strcpy (pop_error, | |
317 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
318 | return (0); | |
319 | } | |
320 | sprintf (pop_error, "USER %s", username); | |
321 | ||
322 | if (sendline (server, pop_error) || getok (server)) | |
323 | { | |
324 | return (0); | |
325 | } | |
326 | ||
327 | if (strlen (password) > ERROR_MAX - 6) | |
328 | { | |
329 | pop_close (server); | |
330 | strcpy (pop_error, | |
331 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
332 | return (0); | |
333 | } | |
334 | sprintf (pop_error, "PASS %s", password); | |
335 | ||
336 | if (sendline (server, pop_error) || getok (server)) | |
337 | { | |
338 | return (0); | |
339 | } | |
340 | ||
341 | return (server); | |
342 | } | |
343 | ||
344 | /* | |
345 | * Function: pop_stat | |
346 | * | |
347 | * Purpose: Issue the STAT command to the server and return (in the | |
348 | * value parameters) the number of messages in the maildrop and | |
349 | * the total size of the maildrop. | |
350 | * | |
351 | * Return value: 0 on success, or non-zero with an error in pop_error | |
352 | * in failure. | |
353 | * | |
354 | * Side effects: On failure, may make further operations on the | |
355 | * connection impossible. | |
356 | */ | |
357 | int | |
358 | pop_stat (server, count, size) | |
359 | popserver server; | |
360 | int *count; | |
361 | int *size; | |
362 | { | |
363 | char *fromserver; | |
364 | ||
365 | if (server->in_multi) | |
366 | { | |
367 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
368 | return (-1); | |
369 | } | |
80b2cbf2 | 370 | |
60b0a379 | 371 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
372 | return (-1); |
373 | ||
374 | if (strncmp (fromserver, "+OK ", 4)) | |
375 | { | |
376 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
377 | { | |
378 | strncpy (pop_error, fromserver, ERROR_MAX); | |
379 | } | |
380 | else | |
381 | { | |
382 | strcpy (pop_error, | |
383 | "Unexpected response from POP server in pop_stat"); | |
384 | pop_trash (server); | |
385 | } | |
386 | return (-1); | |
387 | } | |
388 | ||
389 | *count = atoi (&fromserver[4]); | |
80b2cbf2 | 390 | |
9c0f2dac RS |
391 | fromserver = index (&fromserver[4], ' '); |
392 | if (! fromserver) | |
393 | { | |
394 | strcpy (pop_error, | |
395 | "Badly formatted response from server in pop_stat"); | |
396 | pop_trash (server); | |
397 | return (-1); | |
398 | } | |
399 | ||
400 | *size = atoi (fromserver + 1); | |
401 | ||
402 | return (0); | |
403 | } | |
404 | ||
405 | /* | |
406 | * Function: pop_list | |
407 | * | |
408 | * Purpose: Performs the POP "list" command and returns (in value | |
409 | * parameters) two malloc'd zero-terminated arrays -- one of | |
410 | * message IDs, and a parallel one of sizes. | |
411 | * | |
412 | * Arguments: | |
413 | * server The pop connection to talk to. | |
414 | * message The number of the one message about which to get | |
415 | * information, or 0 to get information about all | |
416 | * messages. | |
417 | * | |
418 | * Return value: 0 on success, non-zero with error in pop_error on | |
419 | * failure. | |
420 | * | |
421 | * Side effects: On failure, may make further operations on the | |
422 | * connection impossible. | |
423 | */ | |
424 | int | |
425 | pop_list (server, message, IDs, sizes) | |
426 | popserver server; | |
427 | int message; | |
428 | int **IDs; | |
429 | int **sizes; | |
430 | { | |
431 | int how_many, i; | |
432 | char *fromserver; | |
433 | ||
434 | if (server->in_multi) | |
435 | { | |
436 | strcpy (pop_error, "In multi-line query in pop_list"); | |
437 | return (-1); | |
438 | } | |
439 | ||
440 | if (message) | |
441 | how_many = 1; | |
442 | else | |
443 | { | |
444 | int count, size; | |
445 | if (pop_stat (server, &count, &size)) | |
446 | return (-1); | |
447 | how_many = count; | |
448 | } | |
449 | ||
450 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
451 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
452 | if (! (*IDs && *sizes)) | |
453 | { | |
454 | strcpy (pop_error, "Out of memory in pop_list"); | |
455 | return (-1); | |
456 | } | |
457 | ||
458 | if (message) | |
459 | { | |
460 | sprintf (pop_error, "LIST %d", message); | |
461 | if (sendline (server, pop_error)) | |
462 | { | |
463 | free ((char *) *IDs); | |
464 | free ((char *) *sizes); | |
465 | return (-1); | |
466 | } | |
60b0a379 | 467 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
468 | { |
469 | free ((char *) *IDs); | |
470 | free ((char *) *sizes); | |
471 | return (-1); | |
472 | } | |
473 | if (strncmp (fromserver, "+OK ", 4)) | |
474 | { | |
475 | if (! strncmp (fromserver, "-ERR", 4)) | |
476 | strncpy (pop_error, fromserver, ERROR_MAX); | |
477 | else | |
478 | { | |
479 | strcpy (pop_error, | |
480 | "Unexpected response from server in pop_list"); | |
481 | pop_trash (server); | |
482 | } | |
483 | free ((char *) *IDs); | |
484 | free ((char *) *sizes); | |
485 | return (-1); | |
486 | } | |
487 | (*IDs)[0] = atoi (&fromserver[4]); | |
488 | fromserver = index (&fromserver[4], ' '); | |
489 | if (! fromserver) | |
490 | { | |
491 | strcpy (pop_error, | |
492 | "Badly formatted response from server in pop_list"); | |
493 | pop_trash (server); | |
494 | free ((char *) *IDs); | |
495 | free ((char *) *sizes); | |
496 | return (-1); | |
497 | } | |
498 | (*sizes)[0] = atoi (fromserver); | |
499 | (*IDs)[1] = (*sizes)[1] = 0; | |
500 | return (0); | |
501 | } | |
502 | else | |
503 | { | |
504 | if (pop_multi_first (server, "LIST", &fromserver)) | |
505 | { | |
506 | free ((char *) *IDs); | |
507 | free ((char *) *sizes); | |
508 | return (-1); | |
509 | } | |
510 | for (i = 0; i < how_many; i++) | |
511 | { | |
d89d0243 | 512 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
513 | { |
514 | free ((char *) *IDs); | |
515 | free ((char *) *sizes); | |
516 | return (-1); | |
517 | } | |
518 | (*IDs)[i] = atoi (fromserver); | |
519 | fromserver = index (fromserver, ' '); | |
520 | if (! fromserver) | |
521 | { | |
522 | strcpy (pop_error, | |
523 | "Badly formatted response from server in pop_list"); | |
524 | free ((char *) *IDs); | |
525 | free ((char *) *sizes); | |
526 | pop_trash (server); | |
527 | return (-1); | |
528 | } | |
529 | (*sizes)[i] = atoi (fromserver); | |
530 | } | |
d89d0243 | 531 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
532 | { |
533 | free ((char *) *IDs); | |
534 | free ((char *) *sizes); | |
535 | return (-1); | |
536 | } | |
537 | else if (fromserver) | |
538 | { | |
539 | strcpy (pop_error, | |
540 | "Too many response lines from server in pop_list"); | |
541 | free ((char *) *IDs); | |
542 | free ((char *) *sizes); | |
543 | return (-1); | |
544 | } | |
545 | (*IDs)[i] = (*sizes)[i] = 0; | |
546 | return (0); | |
547 | } | |
548 | } | |
549 | ||
550 | /* | |
551 | * Function: pop_retrieve | |
552 | * | |
553 | * Purpose: Retrieve a specified message from the maildrop. | |
554 | * | |
555 | * Arguments: | |
556 | * server The server to retrieve from. | |
557 | * message The message number to retrieve. | |
558 | * markfrom | |
559 | * If true, then mark the string "From " at the beginning | |
560 | * of lines with '>'. | |
d89d0243 KH |
561 | * msg_buf Output parameter to which a buffer containing the |
562 | * message is assigned. | |
9c0f2dac | 563 | * |
d89d0243 KH |
564 | * Return value: The number of bytes in msg_buf, which may contain |
565 | * embedded nulls, not including its final null, or -1 on error | |
566 | * with pop_error set. | |
9c0f2dac RS |
567 | * |
568 | * Side effects: May kill connection on error. | |
569 | */ | |
d89d0243 KH |
570 | int |
571 | pop_retrieve (server, message, markfrom, msg_buf) | |
9c0f2dac RS |
572 | popserver server; |
573 | int message; | |
574 | int markfrom; | |
d89d0243 | 575 | char **msg_buf; |
9c0f2dac RS |
576 | { |
577 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
578 | char *ptr, *fromserver; | |
579 | int ret; | |
580 | ||
581 | if (server->in_multi) | |
582 | { | |
583 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 584 | return (-1); |
9c0f2dac RS |
585 | } |
586 | ||
587 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 588 | return (-1); |
9c0f2dac RS |
589 | |
590 | if (pop_retrieve_first (server, message, &fromserver)) | |
591 | { | |
d89d0243 | 592 | return (-1); |
9c0f2dac RS |
593 | } |
594 | ||
595 | /* | |
596 | * The "5" below is an arbitrary constant -- I assume that if | |
597 | * there are "From" lines in the text to be marked, there | |
598 | * probably won't be more than 5 of them. If there are, I | |
599 | * allocate more space for them below. | |
600 | */ | |
601 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 602 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
603 | free ((char *) IDs); |
604 | free ((char *) sizes); | |
605 | ||
606 | if (! ptr) | |
607 | { | |
608 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
609 | pop_retrieve_flush (server); | |
d89d0243 | 610 | return (-1); |
9c0f2dac RS |
611 | } |
612 | ||
d89d0243 | 613 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 614 | { |
9c0f2dac RS |
615 | if (! fromserver) |
616 | { | |
617 | ptr[cp] = '\0'; | |
d89d0243 KH |
618 | *msg_buf = ptr; |
619 | return (cp); | |
9c0f2dac RS |
620 | } |
621 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
622 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
623 | fromserver[4] == ' ') | |
624 | { | |
625 | if (++fromcount == 5) | |
626 | { | |
627 | bufsize += 5; | |
7d665945 | 628 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
629 | if (! ptr) |
630 | { | |
631 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
632 | pop_retrieve_flush (server); | |
d89d0243 | 633 | return (-1); |
9c0f2dac RS |
634 | } |
635 | fromcount = 0; | |
636 | } | |
637 | ptr[cp++] = '>'; | |
638 | } | |
d89d0243 KH |
639 | bcopy (fromserver, &ptr[cp], ret); |
640 | cp += ret; | |
9c0f2dac RS |
641 | ptr[cp++] = '\n'; |
642 | } | |
643 | ||
d89d0243 KH |
644 | free (ptr); |
645 | return (-1); | |
9c0f2dac RS |
646 | } |
647 | ||
648 | int | |
649 | pop_retrieve_first (server, message, response) | |
650 | popserver server; | |
651 | int message; | |
652 | char **response; | |
653 | { | |
654 | sprintf (pop_error, "RETR %d", message); | |
655 | return (pop_multi_first (server, pop_error, response)); | |
656 | } | |
657 | ||
d89d0243 KH |
658 | /* |
659 | Returns a negative number on error, 0 to indicate that the data has | |
660 | all been read (i.e., the server has returned a "." termination | |
661 | line), or a positive number indicating the number of bytes in the | |
662 | returned buffer (which is null-terminated and may contain embedded | |
663 | nulls, but the returned bytecount doesn't include the final null). | |
664 | */ | |
665 | ||
9c0f2dac RS |
666 | int |
667 | pop_retrieve_next (server, line) | |
668 | popserver server; | |
669 | char **line; | |
670 | { | |
671 | return (pop_multi_next (server, line)); | |
672 | } | |
673 | ||
674 | int | |
675 | pop_retrieve_flush (server) | |
676 | popserver server; | |
677 | { | |
678 | return (pop_multi_flush (server)); | |
679 | } | |
680 | ||
681 | int | |
682 | pop_top_first (server, message, lines, response) | |
683 | popserver server; | |
684 | int message, lines; | |
685 | char **response; | |
686 | { | |
687 | sprintf (pop_error, "TOP %d %d", message, lines); | |
688 | return (pop_multi_first (server, pop_error, response)); | |
689 | } | |
690 | ||
d89d0243 KH |
691 | /* |
692 | Returns a negative number on error, 0 to indicate that the data has | |
693 | all been read (i.e., the server has returned a "." termination | |
694 | line), or a positive number indicating the number of bytes in the | |
695 | returned buffer (which is null-terminated and may contain embedded | |
696 | nulls, but the returned bytecount doesn't include the final null). | |
697 | */ | |
698 | ||
9c0f2dac RS |
699 | int |
700 | pop_top_next (server, line) | |
701 | popserver server; | |
702 | char **line; | |
703 | { | |
704 | return (pop_multi_next (server, line)); | |
705 | } | |
706 | ||
707 | int | |
708 | pop_top_flush (server) | |
709 | popserver server; | |
710 | { | |
711 | return (pop_multi_flush (server)); | |
712 | } | |
713 | ||
714 | int | |
715 | pop_multi_first (server, command, response) | |
716 | popserver server; | |
717 | char *command; | |
718 | char **response; | |
719 | { | |
720 | if (server->in_multi) | |
721 | { | |
722 | strcpy (pop_error, | |
723 | "Already in multi-line query in pop_multi_first"); | |
724 | return (-1); | |
725 | } | |
726 | ||
60b0a379 | 727 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
728 | { |
729 | return (-1); | |
730 | } | |
731 | ||
732 | if (0 == strncmp (*response, "-ERR", 4)) | |
733 | { | |
734 | strncpy (pop_error, *response, ERROR_MAX); | |
735 | return (-1); | |
736 | } | |
737 | else if (0 == strncmp (*response, "+OK", 3)) | |
738 | { | |
739 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
740 | server->in_multi = 1; | |
741 | return (0); | |
742 | } | |
743 | else | |
744 | { | |
745 | strcpy (pop_error, | |
746 | "Unexpected response from server in pop_multi_first"); | |
747 | return (-1); | |
748 | } | |
749 | } | |
750 | ||
d89d0243 KH |
751 | /* |
752 | Read the next line of data from SERVER and place a pointer to it | |
753 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
754 | (i.e., the server has returned a line containing only "."), or a | |
755 | positive number indicating the number of bytes in the LINE buffer | |
756 | (not including the final null). The data in that buffer may contain | |
757 | embedded nulls, but does not contain the final CRLF. When returning | |
758 | 0, LINE is set to null. */ | |
759 | ||
9c0f2dac RS |
760 | int |
761 | pop_multi_next (server, line) | |
762 | popserver server; | |
763 | char **line; | |
764 | { | |
765 | char *fromserver; | |
d89d0243 | 766 | int ret; |
9c0f2dac RS |
767 | |
768 | if (! server->in_multi) | |
769 | { | |
770 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
771 | return (-1); | |
772 | } | |
773 | ||
60b0a379 | 774 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
775 | { |
776 | return (-1); | |
777 | } | |
778 | ||
779 | if (fromserver[0] == '.') | |
780 | { | |
781 | if (! fromserver[1]) | |
782 | { | |
783 | *line = 0; | |
784 | server->in_multi = 0; | |
785 | return (0); | |
786 | } | |
787 | else | |
788 | { | |
789 | *line = fromserver + 1; | |
d89d0243 | 790 | return (ret - 1); |
9c0f2dac RS |
791 | } |
792 | } | |
793 | else | |
794 | { | |
795 | *line = fromserver; | |
d89d0243 | 796 | return (ret); |
9c0f2dac RS |
797 | } |
798 | } | |
799 | ||
800 | int | |
801 | pop_multi_flush (server) | |
802 | popserver server; | |
803 | { | |
804 | char *line; | |
d89d0243 | 805 | int ret; |
9c0f2dac RS |
806 | |
807 | if (! server->in_multi) | |
808 | { | |
809 | return (0); | |
810 | } | |
811 | ||
d89d0243 | 812 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 813 | { |
d89d0243 KH |
814 | if (ret < 0) |
815 | return (-1); | |
9c0f2dac RS |
816 | } |
817 | ||
d89d0243 | 818 | return (0); |
9c0f2dac RS |
819 | } |
820 | ||
821 | /* Function: pop_delete | |
822 | * | |
823 | * Purpose: Delete a specified message. | |
824 | * | |
825 | * Arguments: | |
826 | * server Server from which to delete the message. | |
827 | * message Message to delete. | |
828 | * | |
829 | * Return value: 0 on success, non-zero with error in pop_error | |
830 | * otherwise. | |
831 | */ | |
832 | int | |
833 | pop_delete (server, message) | |
834 | popserver server; | |
835 | int message; | |
836 | { | |
837 | if (server->in_multi) | |
838 | { | |
839 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
840 | return (-1); | |
841 | } | |
842 | ||
843 | sprintf (pop_error, "DELE %d", message); | |
844 | ||
845 | if (sendline (server, pop_error) || getok (server)) | |
846 | return (-1); | |
847 | ||
848 | return (0); | |
849 | } | |
850 | ||
851 | /* | |
852 | * Function: pop_noop | |
853 | * | |
854 | * Purpose: Send a noop command to the server. | |
855 | * | |
856 | * Argument: | |
857 | * server The server to send to. | |
858 | * | |
859 | * Return value: 0 on success, non-zero with error in pop_error | |
860 | * otherwise. | |
861 | * | |
862 | * Side effects: Closes connection on error. | |
863 | */ | |
864 | int | |
865 | pop_noop (server) | |
866 | popserver server; | |
867 | { | |
868 | if (server->in_multi) | |
869 | { | |
870 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
871 | return (-1); | |
872 | } | |
873 | ||
874 | if (sendline (server, "NOOP") || getok (server)) | |
875 | return (-1); | |
876 | ||
877 | return (0); | |
878 | } | |
879 | ||
880 | /* | |
881 | * Function: pop_last | |
882 | * | |
883 | * Purpose: Find out the highest seen message from the server. | |
884 | * | |
885 | * Arguments: | |
886 | * server The server. | |
887 | * | |
888 | * Return value: If successful, the highest seen message, which is | |
889 | * greater than or equal to 0. Otherwise, a negative number with | |
890 | * the error explained in pop_error. | |
891 | * | |
892 | * Side effects: Closes the connection on error. | |
893 | */ | |
894 | int | |
895 | pop_last (server) | |
896 | popserver server; | |
897 | { | |
898 | char *fromserver; | |
80b2cbf2 | 899 | |
9c0f2dac RS |
900 | if (server->in_multi) |
901 | { | |
902 | strcpy (pop_error, "In multi-line query in pop_last"); | |
903 | return (-1); | |
904 | } | |
905 | ||
906 | if (sendline (server, "LAST")) | |
907 | return (-1); | |
908 | ||
60b0a379 | 909 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
910 | return (-1); |
911 | ||
912 | if (! strncmp (fromserver, "-ERR", 4)) | |
913 | { | |
914 | strncpy (pop_error, fromserver, ERROR_MAX); | |
915 | return (-1); | |
916 | } | |
917 | else if (strncmp (fromserver, "+OK ", 4)) | |
918 | { | |
919 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
920 | pop_trash (server); | |
921 | return (-1); | |
922 | } | |
923 | else | |
924 | { | |
925 | return (atoi (&fromserver[4])); | |
926 | } | |
927 | } | |
928 | ||
929 | /* | |
930 | * Function: pop_reset | |
931 | * | |
932 | * Purpose: Reset the server to its initial connect state | |
933 | * | |
934 | * Arguments: | |
935 | * server The server. | |
936 | * | |
937 | * Return value: 0 for success, non-0 with error in pop_error | |
938 | * otherwise. | |
939 | * | |
940 | * Side effects: Closes the connection on error. | |
941 | */ | |
942 | int | |
943 | pop_reset (server) | |
944 | popserver server; | |
945 | { | |
946 | if (pop_retrieve_flush (server)) | |
947 | { | |
948 | return (-1); | |
949 | } | |
950 | ||
951 | if (sendline (server, "RSET") || getok (server)) | |
952 | return (-1); | |
953 | ||
954 | return (0); | |
955 | } | |
956 | ||
957 | /* | |
958 | * Function: pop_quit | |
959 | * | |
960 | * Purpose: Quit the connection to the server, | |
961 | * | |
962 | * Arguments: | |
963 | * server The server to quit. | |
964 | * | |
965 | * Return value: 0 for success, non-zero otherwise with error in | |
966 | * pop_error. | |
967 | * | |
8e6208c5 | 968 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
969 | * function is called, even if an error occurs. |
970 | */ | |
971 | int | |
972 | pop_quit (server) | |
973 | popserver server; | |
974 | { | |
975 | int ret = 0; | |
976 | ||
977 | if (server->file >= 0) | |
978 | { | |
979 | if (pop_retrieve_flush (server)) | |
980 | { | |
981 | ret = -1; | |
982 | } | |
983 | ||
984 | if (sendline (server, "QUIT") || getok (server)) | |
985 | { | |
986 | ret = -1; | |
987 | } | |
988 | ||
989 | close (server->file); | |
990 | } | |
991 | ||
992 | if (server->buffer) | |
993 | free (server->buffer); | |
994 | free ((char *) server); | |
995 | ||
996 | return (ret); | |
997 | } | |
998 | ||
c2668a61 RS |
999 | #ifdef WINDOWSNT |
1000 | static int have_winsock = 0; | |
1001 | #endif | |
1002 | ||
9c0f2dac RS |
1003 | /* |
1004 | * Function: socket_connection | |
1005 | * | |
1006 | * Purpose: Opens the network connection with the mail host, without | |
1007 | * doing any sort of I/O with it or anything. | |
1008 | * | |
1009 | * Arguments: | |
1010 | * host The host to which to connect. | |
1011 | * flags Option flags. | |
80b2cbf2 | 1012 | * |
9c0f2dac RS |
1013 | * Return value: A file descriptor indicating the connection, or -1 |
1014 | * indicating failure, in which case an error has been copied | |
1015 | * into pop_error. | |
1016 | */ | |
1017 | static int | |
1018 | socket_connection (host, flags) | |
1019 | char *host; | |
1020 | int flags; | |
1021 | { | |
1022 | struct hostent *hostent; | |
1023 | struct servent *servent; | |
1024 | struct sockaddr_in addr; | |
1025 | char found_port = 0; | |
1026 | char *service; | |
1027 | int sock; | |
1028 | #ifdef KERBEROS | |
a27738b6 | 1029 | #ifdef KERBEROS5 |
9c0f2dac | 1030 | krb5_error_code rem; |
a27738b6 RS |
1031 | krb5_context kcontext = 0; |
1032 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
1033 | krb5_ccache ccdef; |
1034 | krb5_principal client, server; | |
1035 | krb5_error *err_ret; | |
1036 | register char *cp; | |
1037 | #else | |
1038 | KTEXT ticket; | |
1039 | MSG_DAT msg_data; | |
1040 | CREDENTIALS cred; | |
1041 | Key_schedule schedule; | |
1042 | int rem; | |
51a66525 | 1043 | char *realhost; |
a27738b6 | 1044 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1045 | #endif /* KERBEROS */ |
1046 | ||
1047 | int try_count = 0; | |
1048 | ||
c2668a61 RS |
1049 | #ifdef WINDOWSNT |
1050 | { | |
1051 | WSADATA winsockData; | |
1052 | if (WSAStartup (0x101, &winsockData) == 0) | |
1053 | have_winsock = 1; | |
1054 | } | |
1055 | #endif | |
1056 | ||
9c0f2dac RS |
1057 | do |
1058 | { | |
1059 | hostent = gethostbyname (host); | |
1060 | try_count++; | |
1061 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1062 | { | |
1063 | strcpy (pop_error, "Could not determine POP server's address"); | |
1064 | return (-1); | |
1065 | } | |
1066 | } while (! hostent); | |
1067 | ||
1068 | bzero ((char *) &addr, sizeof (addr)); | |
1069 | addr.sin_family = AF_INET; | |
1070 | ||
1071 | #ifdef KERBEROS | |
1072 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1073 | #else | |
1074 | service = POP_SERVICE; | |
1075 | #endif | |
1076 | ||
1077 | #ifdef HESIOD | |
1078 | if (! (flags & POP_NO_HESIOD)) | |
1079 | { | |
1080 | servent = hes_getservbyname (service, "tcp"); | |
1081 | if (servent) | |
1082 | { | |
1083 | addr.sin_port = servent->s_port; | |
1084 | found_port = 1; | |
1085 | } | |
1086 | } | |
1087 | #endif | |
1088 | if (! found_port) | |
1089 | { | |
1090 | servent = getservbyname (service, "tcp"); | |
1091 | if (servent) | |
1092 | { | |
1093 | addr.sin_port = servent->s_port; | |
1094 | } | |
1095 | else | |
1096 | { | |
1097 | #ifdef KERBEROS | |
1098 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1099 | POP_PORT : KPOP_PORT); | |
1100 | #else | |
1101 | addr.sin_port = htons (POP_PORT); | |
1102 | #endif | |
1103 | } | |
1104 | } | |
1105 | ||
a27738b6 | 1106 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1107 | |
1108 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1109 | if (sock < 0) | |
1110 | { | |
a27738b6 | 1111 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1112 | strncat (pop_error, strerror (errno), |
a27738b6 | 1113 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac | 1114 | return (-1); |
80b2cbf2 | 1115 | |
9c0f2dac RS |
1116 | } |
1117 | ||
1118 | while (*hostent->h_addr_list) | |
1119 | { | |
1120 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1121 | hostent->h_length); | |
1122 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1123 | break; | |
1124 | hostent->h_addr_list++; | |
1125 | } | |
1126 | ||
1127 | #define CONNECT_ERROR "Could not connect to POP server: " | |
80b2cbf2 | 1128 | |
9c0f2dac RS |
1129 | if (! *hostent->h_addr_list) |
1130 | { | |
de5c39cf | 1131 | CLOSESOCKET (sock); |
9c0f2dac RS |
1132 | strcpy (pop_error, CONNECT_ERROR); |
1133 | strncat (pop_error, strerror (errno), | |
1134 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1135 | return (-1); | |
80b2cbf2 | 1136 | |
9c0f2dac RS |
1137 | } |
1138 | ||
1139 | #ifdef KERBEROS | |
1140 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1141 | if (! (flags & POP_NO_KERBEROS)) | |
1142 | { | |
a27738b6 RS |
1143 | #ifdef KERBEROS5 |
1144 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1145 | { |
1146 | krb5error: | |
a27738b6 RS |
1147 | if (auth_context) |
1148 | krb5_auth_con_free (kcontext, auth_context); | |
1149 | if (kcontext) | |
1150 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1151 | strcpy (pop_error, KRB_ERROR); |
1152 | strncat (pop_error, error_message (rem), | |
1153 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1154 | CLOSESOCKET (sock); |
9c0f2dac RS |
1155 | return (-1); |
1156 | } | |
1157 | ||
a27738b6 RS |
1158 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1159 | goto krb5error; | |
80b2cbf2 | 1160 | |
a27738b6 RS |
1161 | if (rem = krb5_cc_default (kcontext, &ccdef)) |
1162 | goto krb5error; | |
1163 | ||
1164 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1165 | goto krb5error; | |
9c0f2dac RS |
1166 | |
1167 | for (cp = hostent->h_name; *cp; cp++) | |
1168 | { | |
1169 | if (isupper (*cp)) | |
1170 | { | |
1171 | *cp = tolower (*cp); | |
1172 | } | |
1173 | } | |
1174 | ||
a27738b6 RS |
1175 | if (rem = krb5_sname_to_principal (kcontext, hostent->h_name, |
1176 | POP_SERVICE, FALSE, &server)) | |
1177 | goto krb5error; | |
9c0f2dac | 1178 | |
a27738b6 RS |
1179 | rem = krb5_sendauth (kcontext, &auth_context, |
1180 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1181 | AP_OPTS_MUTUAL_REQUIRED, |
1182 | 0, /* no checksum */ | |
1183 | 0, /* no creds, use ccache instead */ | |
1184 | ccdef, | |
9c0f2dac | 1185 | &err_ret, |
a27738b6 | 1186 | 0, /* don't need subsession key */ |
9c0f2dac | 1187 | 0); /* don't need reply */ |
a27738b6 | 1188 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1189 | if (rem) |
1190 | { | |
1191 | if (err_ret && err_ret->text.length) | |
1192 | { | |
1193 | strcpy (pop_error, KRB_ERROR); | |
1194 | strncat (pop_error, error_message (rem), | |
1195 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1196 | strncat (pop_error, " [server says '", | |
1197 | ERROR_MAX - strlen (pop_error) - 1); | |
1198 | strncat (pop_error, err_ret->text.data, | |
1199 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1200 | err_ret->text.length)); | |
1201 | strncat (pop_error, "']", | |
1202 | ERROR_MAX - strlen (pop_error) - 1); | |
1203 | } | |
1204 | else | |
1205 | { | |
1206 | strcpy (pop_error, KRB_ERROR); | |
1207 | strncat (pop_error, error_message (rem), | |
1208 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1209 | } | |
1210 | if (err_ret) | |
a27738b6 RS |
1211 | krb5_free_error (kcontext, err_ret); |
1212 | krb5_auth_con_free (kcontext, auth_context); | |
1213 | krb5_free_context (kcontext); | |
9c0f2dac | 1214 | |
de5c39cf | 1215 | CLOSESOCKET (sock); |
9c0f2dac RS |
1216 | return (-1); |
1217 | } | |
80b2cbf2 | 1218 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1219 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1220 | realhost = strdup (hostent->h_name); |
1221 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, | |
1222 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1223 | (unsigned long) 0, &msg_data, &cred, schedule, |
1224 | (struct sockaddr_in *) 0, | |
1225 | (struct sockaddr_in *) 0, | |
1226 | "KPOPV0.1"); | |
1227 | free ((char *) ticket); | |
6a7eabe0 | 1228 | free (realhost); |
9c0f2dac RS |
1229 | if (rem != KSUCCESS) |
1230 | { | |
1231 | strcpy (pop_error, KRB_ERROR); | |
1232 | strncat (pop_error, krb_err_txt[rem], | |
1233 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1234 | CLOSESOCKET (sock); |
9c0f2dac RS |
1235 | return (-1); |
1236 | } | |
a27738b6 | 1237 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1238 | } |
1239 | #endif /* KERBEROS */ | |
1240 | ||
1241 | return (sock); | |
1242 | } /* socket_connection */ | |
1243 | ||
1244 | /* | |
60b0a379 | 1245 | * Function: pop_getline |
9c0f2dac RS |
1246 | * |
1247 | * Purpose: Get a line of text from the connection and return a | |
1248 | * pointer to it. The carriage return and linefeed at the end of | |
1249 | * the line are stripped, but periods at the beginnings of lines | |
1250 | * are NOT dealt with in any special way. | |
1251 | * | |
1252 | * Arguments: | |
1253 | * server The server from which to get the line of text. | |
1254 | * | |
d89d0243 KH |
1255 | * Returns: The number of characters in the line, which is returned in |
1256 | * LINE, not including the final null. A return value of 0 | |
1257 | * indicates a blank line. A negative return value indicates an | |
1258 | * error (in which case the contents of LINE are undefined. In | |
1259 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1260 | * |
60b0a379 | 1261 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1262 | * |
1263 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1264 | * |
1265 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1266 | */ |
d89d0243 | 1267 | static int |
60b0a379 | 1268 | pop_getline (server, line) |
9c0f2dac | 1269 | popserver server; |
d89d0243 | 1270 | char **line; |
9c0f2dac RS |
1271 | { |
1272 | #define GETLINE_ERROR "Error reading from server: " | |
1273 | ||
1274 | int ret; | |
b6606ad8 RS |
1275 | int search_offset = 0; |
1276 | ||
9c0f2dac RS |
1277 | if (server->data) |
1278 | { | |
d89d0243 KH |
1279 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1280 | server->data); | |
9c0f2dac RS |
1281 | if (cp) |
1282 | { | |
1283 | int found; | |
1284 | int data_used; | |
1285 | ||
1286 | found = server->buffer_index; | |
1287 | data_used = (cp + 2) - server->buffer - found; | |
80b2cbf2 | 1288 | |
9c0f2dac RS |
1289 | *cp = '\0'; /* terminate the string to be returned */ |
1290 | server->data -= data_used; | |
1291 | server->buffer_index += data_used; | |
1292 | ||
1293 | if (pop_debug) | |
d89d0243 KH |
1294 | /* Embedded nulls will truncate this output prematurely, |
1295 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1296 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1297 | *line = server->buffer + found; |
1298 | return (data_used - 2); | |
9c0f2dac RS |
1299 | } |
1300 | else | |
1301 | { | |
1302 | bcopy (server->buffer + server->buffer_index, | |
1303 | server->buffer, server->data); | |
b6606ad8 RS |
1304 | /* Record the fact that we've searched the data already in |
1305 | the buffer for a CRLF, so that when we search below, we | |
1306 | don't have to search the same data twice. There's a "- | |
1307 | 1" here to account for the fact that the last character | |
1308 | of the data we have may be the CR of a CRLF pair, of | |
1309 | which we haven't read the second half yet, so we may have | |
1310 | to search it again when we read more data. */ | |
1311 | search_offset = server->data - 1; | |
9c0f2dac RS |
1312 | server->buffer_index = 0; |
1313 | } | |
1314 | } | |
1315 | else | |
1316 | { | |
1317 | server->buffer_index = 0; | |
1318 | } | |
1319 | ||
1320 | while (1) | |
1321 | { | |
bbcac09c RS |
1322 | /* There's a "- 1" here to leave room for the null that we put |
1323 | at the end of the read data below. We put the null there so | |
1324 | that find_crlf knows where to stop when we call it. */ | |
1325 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1326 | { |
bbcac09c RS |
1327 | server->buffer_size += GETLINE_INCR; |
1328 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1329 | if (! server->buffer) | |
9c0f2dac | 1330 | { |
bbcac09c RS |
1331 | strcpy (pop_error, "Out of memory in pop_getline"); |
1332 | pop_trash (server); | |
1333 | return (-1); | |
0ea95737 | 1334 | } |
0ea95737 | 1335 | } |
bbcac09c RS |
1336 | ret = RECV (server->file, server->buffer + server->data, |
1337 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1338 | if (ret < 0) |
1339 | { | |
1340 | strcpy (pop_error, GETLINE_ERROR); | |
1341 | strncat (pop_error, strerror (errno), | |
1342 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1343 | pop_trash (server); | |
d89d0243 | 1344 | return (-1); |
9c0f2dac RS |
1345 | } |
1346 | else if (ret == 0) | |
1347 | { | |
60b0a379 | 1348 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1349 | pop_trash (server); |
d89d0243 | 1350 | return (-1); |
9c0f2dac RS |
1351 | } |
1352 | else | |
1353 | { | |
7a481e50 | 1354 | char *cp; |
9c0f2dac | 1355 | server->data += ret; |
7a481e50 | 1356 | server->buffer[server->data] = '\0'; |
80b2cbf2 | 1357 | |
d89d0243 KH |
1358 | cp = find_crlf (server->buffer + search_offset, |
1359 | server->data - search_offset); | |
9c0f2dac RS |
1360 | if (cp) |
1361 | { | |
1362 | int data_used = (cp + 2) - server->buffer; | |
1363 | *cp = '\0'; | |
1364 | server->data -= data_used; | |
1365 | server->buffer_index = data_used; | |
1366 | ||
1367 | if (pop_debug) | |
1368 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1369 | *line = server->buffer; |
1370 | return (data_used - 2); | |
9c0f2dac | 1371 | } |
a8f44d07 RS |
1372 | /* As above, the "- 1" here is to account for the fact that |
1373 | we may have read a CR without its accompanying LF. */ | |
1374 | search_offset += ret - 1; | |
9c0f2dac RS |
1375 | } |
1376 | } | |
1377 | ||
1378 | /* NOTREACHED */ | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | * Function: sendline | |
1383 | * | |
1384 | * Purpose: Sends a line of text to the POP server. The line of text | |
1385 | * passed into this function should NOT have the carriage return | |
1386 | * and linefeed on the end of it. Periods at beginnings of lines | |
1387 | * will NOT be treated specially by this function. | |
1388 | * | |
1389 | * Arguments: | |
1390 | * server The server to which to send the text. | |
1391 | * line The line of text to send. | |
1392 | * | |
1393 | * Return value: Upon successful completion, a value of 0 will be | |
1394 | * returned. Otherwise, a non-zero value will be returned, and | |
1395 | * an error will be copied into pop_error. | |
1396 | * | |
1397 | * Side effects: Closes the connection on error. | |
1398 | */ | |
1399 | static int | |
1400 | sendline (server, line) | |
1401 | popserver server; | |
1402 | char *line; | |
1403 | { | |
1404 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1405 | int ret; | |
1406 | ||
bbcac09c RS |
1407 | ret = fullwrite (server->file, line, strlen (line)); |
1408 | if (ret >= 0) | |
1409 | { /* 0 indicates that a blank line was written */ | |
1410 | ret = fullwrite (server->file, "\r\n", 2); | |
9c0f2dac RS |
1411 | } |
1412 | ||
1413 | if (ret < 0) | |
1414 | { | |
1415 | pop_trash (server); | |
1416 | strcpy (pop_error, SENDLINE_ERROR); | |
1417 | strncat (pop_error, strerror (errno), | |
1418 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1419 | return (ret); | |
1420 | } | |
1421 | ||
1422 | if (pop_debug) | |
1423 | fprintf (stderr, ">>> %s\n", line); | |
1424 | ||
1425 | return (0); | |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * Procedure: fullwrite | |
1430 | * | |
1431 | * Purpose: Just like write, but keeps trying until the entire string | |
1432 | * has been written. | |
1433 | * | |
1434 | * Return value: Same as write. Pop_error is not set. | |
1435 | */ | |
1436 | static int | |
1437 | fullwrite (fd, buf, nbytes) | |
1438 | int fd; | |
1439 | char *buf; | |
1440 | int nbytes; | |
1441 | { | |
1442 | char *cp; | |
9d3f4cee | 1443 | int ret = 0; |
9c0f2dac RS |
1444 | |
1445 | cp = buf; | |
9d3f4cee | 1446 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1447 | { |
1448 | cp += ret; | |
1449 | nbytes -= ret; | |
1450 | } | |
1451 | ||
1452 | return (ret); | |
1453 | } | |
1454 | ||
1455 | /* | |
1456 | * Procedure getok | |
1457 | * | |
1458 | * Purpose: Reads a line from the server. If the return indicator is | |
1459 | * positive, return with a zero exit status. If not, return with | |
1460 | * a negative exit status. | |
1461 | * | |
1462 | * Arguments: | |
1463 | * server The server to read from. | |
80b2cbf2 | 1464 | * |
9c0f2dac RS |
1465 | * Returns: 0 for success, else for failure and puts error in pop_error. |
1466 | * | |
8e6208c5 | 1467 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1468 | */ |
1469 | static int | |
1470 | getok (server) | |
1471 | popserver server; | |
1472 | { | |
1473 | char *fromline; | |
1474 | ||
60b0a379 | 1475 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1476 | { |
1477 | return (-1); | |
1478 | } | |
1479 | ||
1480 | if (! strncmp (fromline, "+OK", 3)) | |
1481 | return (0); | |
1482 | else if (! strncmp (fromline, "-ERR", 4)) | |
1483 | { | |
1484 | strncpy (pop_error, fromline, ERROR_MAX); | |
1485 | pop_error[ERROR_MAX-1] = '\0'; | |
1486 | return (-1); | |
1487 | } | |
1488 | else | |
1489 | { | |
1490 | strcpy (pop_error, | |
1491 | "Unexpected response from server; expecting +OK or -ERR"); | |
1492 | pop_trash (server); | |
1493 | return (-1); | |
1494 | } | |
80b2cbf2 | 1495 | } |
9c0f2dac RS |
1496 | |
1497 | #if 0 | |
1498 | /* | |
1499 | * Function: gettermination | |
1500 | * | |
1501 | * Purpose: Gets the next line and verifies that it is a termination | |
1502 | * line (nothing but a dot). | |
1503 | * | |
1504 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1505 | * | |
1506 | * Side effects: Closes the connection on error. | |
1507 | */ | |
1508 | static int | |
1509 | gettermination (server) | |
1510 | popserver server; | |
1511 | { | |
1512 | char *fromserver; | |
1513 | ||
60b0a379 | 1514 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1515 | return (-1); |
1516 | ||
1517 | if (strcmp (fromserver, ".")) | |
1518 | { | |
1519 | strcpy (pop_error, | |
1520 | "Unexpected response from server in gettermination"); | |
1521 | pop_trash (server); | |
1522 | return (-1); | |
1523 | } | |
1524 | ||
1525 | return (0); | |
1526 | } | |
1527 | #endif | |
1528 | ||
1529 | /* | |
1530 | * Function pop_close | |
1531 | * | |
1532 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1533 | * preserve any changes that were made and a "QUIT" command to | |
1534 | * try to get the server to quit, but ignoring any responses that | |
1535 | * are received. | |
1536 | * | |
8e6208c5 | 1537 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1538 | * Changes made to the maildrop since the session was started (or |
1539 | * since the last pop_reset) may be lost. | |
1540 | */ | |
80b2cbf2 | 1541 | void |
9c0f2dac RS |
1542 | pop_close (server) |
1543 | popserver server; | |
1544 | { | |
1545 | pop_trash (server); | |
1546 | free ((char *) server); | |
1547 | ||
1548 | return; | |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * Function: pop_trash | |
1553 | * | |
1554 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1555 | * memory associated with the server. It is legal to call | |
1556 | * pop_close or pop_quit after this function has been called. | |
1557 | */ | |
1558 | static void | |
1559 | pop_trash (server) | |
1560 | popserver server; | |
1561 | { | |
1562 | if (server->file >= 0) | |
1563 | { | |
c2668a61 RS |
1564 | /* avoid recursion; sendline can call pop_trash */ |
1565 | if (server->trash_started) | |
1566 | return; | |
1567 | server->trash_started = 1; | |
de5c39cf | 1568 | |
9c0f2dac RS |
1569 | sendline (server, "RSET"); |
1570 | sendline (server, "QUIT"); | |
1571 | ||
de5c39cf | 1572 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1573 | server->file = -1; |
1574 | if (server->buffer) | |
1575 | { | |
1576 | free (server->buffer); | |
1577 | server->buffer = 0; | |
1578 | } | |
1579 | } | |
c2668a61 RS |
1580 | |
1581 | #ifdef WINDOWSNT | |
1582 | if (have_winsock) | |
1583 | WSACleanup (); | |
1584 | #endif | |
9c0f2dac RS |
1585 | } |
1586 | ||
d89d0243 KH |
1587 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1588 | embedded nulls and has LEN characters in it not including the final | |
1589 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1590 | |
1591 | static char * | |
d89d0243 | 1592 | find_crlf (in_string, len) |
8148baf9 | 1593 | char *in_string; |
d89d0243 | 1594 | int len; |
9c0f2dac | 1595 | { |
d89d0243 | 1596 | while (len--) |
9c0f2dac | 1597 | { |
d89d0243 | 1598 | if (*in_string == '\r') |
8148baf9 RS |
1599 | { |
1600 | if (*++in_string == '\n') | |
1601 | return (in_string - 1); | |
1602 | } | |
1603 | else | |
1604 | in_string++; | |
9c0f2dac | 1605 | } |
d89d0243 | 1606 | return (0); |
9c0f2dac RS |
1607 | } |
1608 | ||
1609 | #endif /* MAIL_USE_POP */ |