Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
b3d90e46 GM |
2 | Copyright (C) 1991, 1993, 1996, 1997, 1999, 2001, 2002, 2003, 2004, |
3 | 2005, 2006, 2007 Free Software Foundation, Inc. | |
9c0f2dac RS |
4 | Written by Jonathan Kamens, jik@security.ov.com. |
5 | ||
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
4a9f99bd | 10 | the Free Software Foundation; either version 3, or (at your option) |
9c0f2dac RS |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
9c0f2dac | 22 | |
8148baf9 RS |
23 | #ifdef HAVE_CONFIG_H |
24 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ | |
2f8fe2f4 | 25 | #include <config.h> |
8148baf9 RS |
26 | #else |
27 | #define MAIL_USE_POP | |
28 | #endif | |
c9c3d8f6 | 29 | |
8148baf9 RS |
30 | #ifdef MAIL_USE_POP |
31 | ||
9c0f2dac | 32 | #include <sys/types.h> |
c2668a61 RS |
33 | #ifdef WINDOWSNT |
34 | #include "ntlib.h" | |
35 | #include <winsock.h> | |
36 | #undef SOCKET_ERROR | |
de5c39cf RS |
37 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
38 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
39 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 40 | #else |
9c0f2dac RS |
41 | #include <netinet/in.h> |
42 | #include <sys/socket.h> | |
de5c39cf RS |
43 | #define RECV(s,buf,len,flags) read(s,buf,len) |
44 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
45 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 46 | #endif |
9c0f2dac | 47 | #include <pop.h> |
625ad89f | 48 | |
9c0f2dac RS |
49 | #ifdef sun |
50 | #include <malloc.h> | |
8148baf9 | 51 | #endif /* sun */ |
625ad89f | 52 | |
9c0f2dac RS |
53 | #ifdef HESIOD |
54 | #include <hesiod.h> | |
55 | /* | |
56 | * It really shouldn't be necessary to put this declaration here, but | |
57 | * the version of hesiod.h that Athena has installed in release 7.2 | |
58 | * doesn't declare this function; I don't know if the 7.3 version of | |
59 | * hesiod.h does. | |
60 | */ | |
61 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
62 | #endif | |
625ad89f | 63 | |
9c0f2dac | 64 | #include <pwd.h> |
9c0f2dac RS |
65 | #include <netdb.h> |
66 | #include <errno.h> | |
67 | #include <stdio.h> | |
a27738b6 RS |
68 | #ifdef STDC_HEADERS |
69 | #include <string.h> | |
020d3015 KH |
70 | #define index strchr |
71 | #endif | |
020d3015 KH |
72 | #ifdef HAVE_UNISTD_H |
73 | #include <unistd.h> | |
a27738b6 | 74 | #endif |
625ad89f | 75 | |
9c0f2dac | 76 | #ifdef KERBEROS |
a27738b6 RS |
77 | # ifdef HAVE_KRB5_H |
78 | # include <krb5.h> | |
79 | # endif | |
a27738b6 RS |
80 | # ifdef HAVE_KRB_H |
81 | # include <krb.h> | |
82 | # else | |
83 | # ifdef HAVE_KERBEROSIV_KRB_H | |
84 | # include <kerberosIV/krb.h> | |
85 | # else | |
86 | # ifdef HAVE_KERBEROS_KRB_H | |
87 | # include <kerberos/krb.h> | |
88 | # endif | |
89 | # endif | |
90 | # endif | |
91 | # ifdef HAVE_COM_ERR_H | |
92 | # include <com_err.h> | |
93 | # endif | |
8148baf9 | 94 | #endif /* KERBEROS */ |
9c0f2dac | 95 | |
8148baf9 | 96 | #ifdef KERBEROS |
a27738b6 | 97 | #ifndef KERBEROS5 |
9c0f2dac | 98 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
99 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
100 | struct sockaddr_in *, struct sockaddr_in *, | |
101 | char * */); | |
9c0f2dac | 102 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 103 | #endif /* ! KERBEROS5 */ |
8148baf9 | 104 | #endif /* KERBEROS */ |
9c0f2dac | 105 | |
c2668a61 | 106 | #ifndef WINDOWSNT |
8148baf9 | 107 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
108 | extern int h_errno; |
109 | #endif | |
c2668a61 | 110 | #endif |
9c0f2dac | 111 | |
1cb12638 | 112 | #ifndef __P |
d89d0243 | 113 | # ifdef __STDC__ |
1cb12638 | 114 | # define __P(a) a |
d89d0243 | 115 | # else |
1cb12638 | 116 | # define __P(a) () |
d89d0243 KH |
117 | # endif /* __STDC__ */ |
118 | #endif /* ! __P */ | |
119 | ||
1cb12638 KS |
120 | static int socket_connection __P((char *, int)); |
121 | static int pop_getline __P((popserver, char **)); | |
122 | static int sendline __P((popserver, char *)); | |
123 | static int fullwrite __P((int, char *, int)); | |
124 | static int getok __P((popserver)); | |
9c0f2dac | 125 | #if 0 |
1cb12638 | 126 | static int gettermination __P((popserver)); |
9c0f2dac | 127 | #endif |
1cb12638 KS |
128 | static void pop_trash __P((popserver)); |
129 | static char *find_crlf __P((char *, int)); | |
7a481e50 | 130 | |
5bf244f1 | 131 | #define ERROR_MAX 160 /* a pretty arbitrary size, but needs |
a47bf648 DL |
132 | to be bigger than the original |
133 | value of 80 */ | |
9c0f2dac RS |
134 | #define POP_PORT 110 |
135 | #define KPOP_PORT 1109 | |
c2668a61 | 136 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ |
9c0f2dac | 137 | #ifdef KERBEROS |
81264b38 | 138 | #define KPOP_SERVICE "kpop" /* never used: look for 20060515 to see why */ |
9c0f2dac | 139 | #endif |
9c0f2dac RS |
140 | |
141 | char pop_error[ERROR_MAX]; | |
142 | int pop_debug = 0; | |
143 | ||
144 | #ifndef min | |
145 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
146 | #endif | |
147 | ||
148 | /* | |
149 | * Function: pop_open (char *host, char *username, char *password, | |
150 | * int flags) | |
151 | * | |
152 | * Purpose: Establishes a connection with a post-office server, and | |
153 | * completes the authorization portion of the session. | |
154 | * | |
155 | * Arguments: | |
156 | * host The server host with which the connection should be | |
157 | * established. Optional. If omitted, internal | |
158 | * heuristics will be used to determine the server host, | |
159 | * if possible. | |
160 | * username | |
161 | * The username of the mail-drop to access. Optional. | |
162 | * If omitted, internal heuristics will be used to | |
163 | * determine the username, if possible. | |
164 | * password | |
165 | * The password to use for authorization. If omitted, | |
166 | * internal heuristics will be used to determine the | |
167 | * password, if possible. | |
168 | * flags A bit mask containing flags controlling certain | |
169 | * functions of the routine. Valid flags are defined in | |
170 | * the file pop.h | |
171 | * | |
172 | * Return value: Upon successful establishment of a connection, a | |
173 | * non-null popserver will be returned. Otherwise, null will be | |
174 | * returned, and the string variable pop_error will contain an | |
175 | * explanation of the error. | |
176 | */ | |
177 | popserver | |
178 | pop_open (host, username, password, flags) | |
179 | char *host; | |
180 | char *username; | |
181 | char *password; | |
182 | int flags; | |
183 | { | |
184 | int sock; | |
185 | popserver server; | |
186 | ||
187 | /* Determine the user name */ | |
188 | if (! username) | |
189 | { | |
190 | username = getenv ("USER"); | |
191 | if (! (username && *username)) | |
192 | { | |
193 | username = getlogin (); | |
194 | if (! (username && *username)) | |
195 | { | |
196 | struct passwd *passwd; | |
197 | passwd = getpwuid (getuid ()); | |
198 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
199 | { | |
200 | username = passwd->pw_name; | |
201 | } | |
202 | else | |
203 | { | |
204 | strcpy (pop_error, "Could not determine username"); | |
205 | return (0); | |
206 | } | |
207 | } | |
208 | } | |
209 | } | |
210 | ||
211 | /* | |
212 | * Determine the mail host. | |
213 | */ | |
214 | ||
215 | if (! host) | |
216 | { | |
217 | host = getenv ("MAILHOST"); | |
218 | } | |
219 | ||
220 | #ifdef HESIOD | |
221 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
222 | { | |
223 | struct hes_postoffice *office; | |
224 | office = hes_getmailhost (username); | |
225 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
226 | && office->po_name && *office->po_name && office->po_host | |
227 | && *office->po_host) | |
228 | { | |
229 | host = office->po_host; | |
230 | username = office->po_name; | |
231 | } | |
232 | } | |
233 | #endif | |
234 | ||
235 | #ifdef MAILHOST | |
236 | if (! host) | |
237 | { | |
238 | host = MAILHOST; | |
239 | } | |
240 | #endif | |
241 | ||
242 | if (! host) | |
243 | { | |
244 | strcpy (pop_error, "Could not determine POP server"); | |
245 | return (0); | |
246 | } | |
247 | ||
248 | /* Determine the password */ | |
bbcac09c RS |
249 | #ifdef KERBEROS |
250 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
9c0f2dac | 251 | #else |
bbcac09c | 252 | #define DONT_NEED_PASSWORD 0 |
9c0f2dac | 253 | #endif |
177c0ea7 | 254 | |
9c0f2dac RS |
255 | if ((! password) && (! DONT_NEED_PASSWORD)) |
256 | { | |
257 | if (! (flags & POP_NO_GETPASS)) | |
258 | { | |
259 | password = getpass ("Enter POP password:"); | |
260 | } | |
261 | if (! password) | |
262 | { | |
263 | strcpy (pop_error, "Could not determine POP password"); | |
264 | return (0); | |
265 | } | |
266 | } | |
81264b38 | 267 | if (password) /* always true, detected 20060515 */ |
bbcac09c | 268 | flags |= POP_NO_KERBEROS; |
9c0f2dac | 269 | else |
81264b38 FP |
270 | password = username; /* dead code, detected 20060515 */ |
271 | /** "kpop" service is never used: look for 20060515 to see why **/ | |
9c0f2dac RS |
272 | |
273 | sock = socket_connection (host, flags); | |
274 | if (sock == -1) | |
275 | return (0); | |
276 | ||
277 | server = (popserver) malloc (sizeof (struct _popserver)); | |
278 | if (! server) | |
279 | { | |
280 | strcpy (pop_error, "Out of memory in pop_open"); | |
281 | return (0); | |
282 | } | |
283 | server->buffer = (char *) malloc (GETLINE_MIN); | |
284 | if (! server->buffer) | |
285 | { | |
286 | strcpy (pop_error, "Out of memory in pop_open"); | |
287 | free ((char *) server); | |
288 | return (0); | |
289 | } | |
80b2cbf2 | 290 | |
9c0f2dac RS |
291 | server->file = sock; |
292 | server->data = 0; | |
293 | server->buffer_index = 0; | |
294 | server->buffer_size = GETLINE_MIN; | |
295 | server->in_multi = 0; | |
c2668a61 | 296 | server->trash_started = 0; |
9c0f2dac RS |
297 | |
298 | if (getok (server)) | |
299 | return (0); | |
300 | ||
301 | /* | |
302 | * I really shouldn't use the pop_error variable like this, but.... | |
303 | */ | |
304 | if (strlen (username) > ERROR_MAX - 6) | |
305 | { | |
306 | pop_close (server); | |
307 | strcpy (pop_error, | |
308 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
309 | return (0); | |
310 | } | |
311 | sprintf (pop_error, "USER %s", username); | |
312 | ||
313 | if (sendline (server, pop_error) || getok (server)) | |
314 | { | |
315 | return (0); | |
316 | } | |
317 | ||
318 | if (strlen (password) > ERROR_MAX - 6) | |
319 | { | |
320 | pop_close (server); | |
321 | strcpy (pop_error, | |
322 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
323 | return (0); | |
324 | } | |
325 | sprintf (pop_error, "PASS %s", password); | |
326 | ||
327 | if (sendline (server, pop_error) || getok (server)) | |
328 | { | |
329 | return (0); | |
330 | } | |
331 | ||
332 | return (server); | |
333 | } | |
334 | ||
335 | /* | |
336 | * Function: pop_stat | |
337 | * | |
338 | * Purpose: Issue the STAT command to the server and return (in the | |
339 | * value parameters) the number of messages in the maildrop and | |
340 | * the total size of the maildrop. | |
341 | * | |
342 | * Return value: 0 on success, or non-zero with an error in pop_error | |
343 | * in failure. | |
344 | * | |
345 | * Side effects: On failure, may make further operations on the | |
346 | * connection impossible. | |
347 | */ | |
348 | int | |
349 | pop_stat (server, count, size) | |
350 | popserver server; | |
351 | int *count; | |
352 | int *size; | |
353 | { | |
354 | char *fromserver; | |
355 | ||
356 | if (server->in_multi) | |
357 | { | |
358 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
359 | return (-1); | |
360 | } | |
80b2cbf2 | 361 | |
60b0a379 | 362 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
363 | return (-1); |
364 | ||
365 | if (strncmp (fromserver, "+OK ", 4)) | |
366 | { | |
367 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
368 | { | |
369 | strncpy (pop_error, fromserver, ERROR_MAX); | |
370 | } | |
371 | else | |
372 | { | |
373 | strcpy (pop_error, | |
374 | "Unexpected response from POP server in pop_stat"); | |
375 | pop_trash (server); | |
376 | } | |
377 | return (-1); | |
378 | } | |
379 | ||
380 | *count = atoi (&fromserver[4]); | |
80b2cbf2 | 381 | |
9c0f2dac RS |
382 | fromserver = index (&fromserver[4], ' '); |
383 | if (! fromserver) | |
384 | { | |
385 | strcpy (pop_error, | |
386 | "Badly formatted response from server in pop_stat"); | |
387 | pop_trash (server); | |
388 | return (-1); | |
389 | } | |
390 | ||
391 | *size = atoi (fromserver + 1); | |
392 | ||
393 | return (0); | |
394 | } | |
395 | ||
396 | /* | |
397 | * Function: pop_list | |
398 | * | |
399 | * Purpose: Performs the POP "list" command and returns (in value | |
400 | * parameters) two malloc'd zero-terminated arrays -- one of | |
401 | * message IDs, and a parallel one of sizes. | |
402 | * | |
403 | * Arguments: | |
404 | * server The pop connection to talk to. | |
405 | * message The number of the one message about which to get | |
406 | * information, or 0 to get information about all | |
407 | * messages. | |
408 | * | |
409 | * Return value: 0 on success, non-zero with error in pop_error on | |
410 | * failure. | |
411 | * | |
412 | * Side effects: On failure, may make further operations on the | |
413 | * connection impossible. | |
414 | */ | |
415 | int | |
416 | pop_list (server, message, IDs, sizes) | |
417 | popserver server; | |
418 | int message; | |
419 | int **IDs; | |
420 | int **sizes; | |
421 | { | |
422 | int how_many, i; | |
423 | char *fromserver; | |
424 | ||
425 | if (server->in_multi) | |
426 | { | |
427 | strcpy (pop_error, "In multi-line query in pop_list"); | |
428 | return (-1); | |
429 | } | |
430 | ||
431 | if (message) | |
432 | how_many = 1; | |
433 | else | |
434 | { | |
435 | int count, size; | |
436 | if (pop_stat (server, &count, &size)) | |
437 | return (-1); | |
438 | how_many = count; | |
439 | } | |
440 | ||
441 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
442 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
443 | if (! (*IDs && *sizes)) | |
444 | { | |
445 | strcpy (pop_error, "Out of memory in pop_list"); | |
446 | return (-1); | |
447 | } | |
448 | ||
449 | if (message) | |
450 | { | |
451 | sprintf (pop_error, "LIST %d", message); | |
452 | if (sendline (server, pop_error)) | |
453 | { | |
454 | free ((char *) *IDs); | |
455 | free ((char *) *sizes); | |
456 | return (-1); | |
457 | } | |
60b0a379 | 458 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
459 | { |
460 | free ((char *) *IDs); | |
461 | free ((char *) *sizes); | |
462 | return (-1); | |
463 | } | |
464 | if (strncmp (fromserver, "+OK ", 4)) | |
465 | { | |
466 | if (! strncmp (fromserver, "-ERR", 4)) | |
467 | strncpy (pop_error, fromserver, ERROR_MAX); | |
468 | else | |
469 | { | |
470 | strcpy (pop_error, | |
471 | "Unexpected response from server in pop_list"); | |
472 | pop_trash (server); | |
473 | } | |
474 | free ((char *) *IDs); | |
475 | free ((char *) *sizes); | |
476 | return (-1); | |
477 | } | |
478 | (*IDs)[0] = atoi (&fromserver[4]); | |
479 | fromserver = index (&fromserver[4], ' '); | |
480 | if (! fromserver) | |
481 | { | |
482 | strcpy (pop_error, | |
483 | "Badly formatted response from server in pop_list"); | |
484 | pop_trash (server); | |
485 | free ((char *) *IDs); | |
486 | free ((char *) *sizes); | |
487 | return (-1); | |
488 | } | |
489 | (*sizes)[0] = atoi (fromserver); | |
490 | (*IDs)[1] = (*sizes)[1] = 0; | |
491 | return (0); | |
492 | } | |
493 | else | |
494 | { | |
495 | if (pop_multi_first (server, "LIST", &fromserver)) | |
496 | { | |
497 | free ((char *) *IDs); | |
498 | free ((char *) *sizes); | |
499 | return (-1); | |
500 | } | |
501 | for (i = 0; i < how_many; i++) | |
502 | { | |
d89d0243 | 503 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
504 | { |
505 | free ((char *) *IDs); | |
506 | free ((char *) *sizes); | |
507 | return (-1); | |
508 | } | |
509 | (*IDs)[i] = atoi (fromserver); | |
510 | fromserver = index (fromserver, ' '); | |
511 | if (! fromserver) | |
512 | { | |
513 | strcpy (pop_error, | |
514 | "Badly formatted response from server in pop_list"); | |
515 | free ((char *) *IDs); | |
516 | free ((char *) *sizes); | |
517 | pop_trash (server); | |
518 | return (-1); | |
519 | } | |
520 | (*sizes)[i] = atoi (fromserver); | |
521 | } | |
d89d0243 | 522 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
523 | { |
524 | free ((char *) *IDs); | |
525 | free ((char *) *sizes); | |
526 | return (-1); | |
527 | } | |
528 | else if (fromserver) | |
529 | { | |
530 | strcpy (pop_error, | |
531 | "Too many response lines from server in pop_list"); | |
532 | free ((char *) *IDs); | |
533 | free ((char *) *sizes); | |
534 | return (-1); | |
535 | } | |
536 | (*IDs)[i] = (*sizes)[i] = 0; | |
537 | return (0); | |
538 | } | |
539 | } | |
540 | ||
541 | /* | |
542 | * Function: pop_retrieve | |
543 | * | |
544 | * Purpose: Retrieve a specified message from the maildrop. | |
545 | * | |
546 | * Arguments: | |
547 | * server The server to retrieve from. | |
548 | * message The message number to retrieve. | |
549 | * markfrom | |
550 | * If true, then mark the string "From " at the beginning | |
551 | * of lines with '>'. | |
d89d0243 KH |
552 | * msg_buf Output parameter to which a buffer containing the |
553 | * message is assigned. | |
177c0ea7 | 554 | * |
d89d0243 KH |
555 | * Return value: The number of bytes in msg_buf, which may contain |
556 | * embedded nulls, not including its final null, or -1 on error | |
557 | * with pop_error set. | |
9c0f2dac RS |
558 | * |
559 | * Side effects: May kill connection on error. | |
560 | */ | |
d89d0243 KH |
561 | int |
562 | pop_retrieve (server, message, markfrom, msg_buf) | |
9c0f2dac RS |
563 | popserver server; |
564 | int message; | |
565 | int markfrom; | |
d89d0243 | 566 | char **msg_buf; |
9c0f2dac RS |
567 | { |
568 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
569 | char *ptr, *fromserver; | |
570 | int ret; | |
571 | ||
572 | if (server->in_multi) | |
573 | { | |
574 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 575 | return (-1); |
9c0f2dac RS |
576 | } |
577 | ||
578 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 579 | return (-1); |
9c0f2dac RS |
580 | |
581 | if (pop_retrieve_first (server, message, &fromserver)) | |
582 | { | |
d89d0243 | 583 | return (-1); |
9c0f2dac RS |
584 | } |
585 | ||
586 | /* | |
587 | * The "5" below is an arbitrary constant -- I assume that if | |
588 | * there are "From" lines in the text to be marked, there | |
589 | * probably won't be more than 5 of them. If there are, I | |
590 | * allocate more space for them below. | |
591 | */ | |
592 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 593 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
594 | free ((char *) IDs); |
595 | free ((char *) sizes); | |
596 | ||
597 | if (! ptr) | |
598 | { | |
599 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
600 | pop_retrieve_flush (server); | |
d89d0243 | 601 | return (-1); |
9c0f2dac RS |
602 | } |
603 | ||
d89d0243 | 604 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 605 | { |
9c0f2dac RS |
606 | if (! fromserver) |
607 | { | |
608 | ptr[cp] = '\0'; | |
d89d0243 KH |
609 | *msg_buf = ptr; |
610 | return (cp); | |
9c0f2dac RS |
611 | } |
612 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
613 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
614 | fromserver[4] == ' ') | |
615 | { | |
616 | if (++fromcount == 5) | |
617 | { | |
618 | bufsize += 5; | |
7d665945 | 619 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
620 | if (! ptr) |
621 | { | |
622 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
623 | pop_retrieve_flush (server); | |
d89d0243 | 624 | return (-1); |
9c0f2dac RS |
625 | } |
626 | fromcount = 0; | |
627 | } | |
628 | ptr[cp++] = '>'; | |
629 | } | |
d89d0243 KH |
630 | bcopy (fromserver, &ptr[cp], ret); |
631 | cp += ret; | |
9c0f2dac RS |
632 | ptr[cp++] = '\n'; |
633 | } | |
634 | ||
d89d0243 KH |
635 | free (ptr); |
636 | return (-1); | |
177c0ea7 | 637 | } |
9c0f2dac RS |
638 | |
639 | int | |
640 | pop_retrieve_first (server, message, response) | |
641 | popserver server; | |
642 | int message; | |
643 | char **response; | |
644 | { | |
645 | sprintf (pop_error, "RETR %d", message); | |
646 | return (pop_multi_first (server, pop_error, response)); | |
647 | } | |
648 | ||
d89d0243 KH |
649 | /* |
650 | Returns a negative number on error, 0 to indicate that the data has | |
651 | all been read (i.e., the server has returned a "." termination | |
652 | line), or a positive number indicating the number of bytes in the | |
653 | returned buffer (which is null-terminated and may contain embedded | |
654 | nulls, but the returned bytecount doesn't include the final null). | |
655 | */ | |
656 | ||
9c0f2dac RS |
657 | int |
658 | pop_retrieve_next (server, line) | |
659 | popserver server; | |
660 | char **line; | |
661 | { | |
662 | return (pop_multi_next (server, line)); | |
663 | } | |
664 | ||
665 | int | |
666 | pop_retrieve_flush (server) | |
667 | popserver server; | |
668 | { | |
669 | return (pop_multi_flush (server)); | |
670 | } | |
671 | ||
672 | int | |
673 | pop_top_first (server, message, lines, response) | |
674 | popserver server; | |
675 | int message, lines; | |
676 | char **response; | |
677 | { | |
678 | sprintf (pop_error, "TOP %d %d", message, lines); | |
679 | return (pop_multi_first (server, pop_error, response)); | |
680 | } | |
681 | ||
d89d0243 KH |
682 | /* |
683 | Returns a negative number on error, 0 to indicate that the data has | |
684 | all been read (i.e., the server has returned a "." termination | |
685 | line), or a positive number indicating the number of bytes in the | |
686 | returned buffer (which is null-terminated and may contain embedded | |
687 | nulls, but the returned bytecount doesn't include the final null). | |
688 | */ | |
689 | ||
9c0f2dac RS |
690 | int |
691 | pop_top_next (server, line) | |
692 | popserver server; | |
693 | char **line; | |
694 | { | |
695 | return (pop_multi_next (server, line)); | |
696 | } | |
697 | ||
698 | int | |
699 | pop_top_flush (server) | |
700 | popserver server; | |
701 | { | |
702 | return (pop_multi_flush (server)); | |
703 | } | |
704 | ||
705 | int | |
706 | pop_multi_first (server, command, response) | |
707 | popserver server; | |
708 | char *command; | |
709 | char **response; | |
710 | { | |
711 | if (server->in_multi) | |
712 | { | |
713 | strcpy (pop_error, | |
714 | "Already in multi-line query in pop_multi_first"); | |
715 | return (-1); | |
716 | } | |
717 | ||
60b0a379 | 718 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
719 | { |
720 | return (-1); | |
721 | } | |
722 | ||
723 | if (0 == strncmp (*response, "-ERR", 4)) | |
724 | { | |
725 | strncpy (pop_error, *response, ERROR_MAX); | |
726 | return (-1); | |
727 | } | |
728 | else if (0 == strncmp (*response, "+OK", 3)) | |
729 | { | |
730 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
731 | server->in_multi = 1; | |
732 | return (0); | |
733 | } | |
734 | else | |
735 | { | |
736 | strcpy (pop_error, | |
737 | "Unexpected response from server in pop_multi_first"); | |
738 | return (-1); | |
739 | } | |
740 | } | |
741 | ||
d89d0243 KH |
742 | /* |
743 | Read the next line of data from SERVER and place a pointer to it | |
744 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
745 | (i.e., the server has returned a line containing only "."), or a | |
746 | positive number indicating the number of bytes in the LINE buffer | |
747 | (not including the final null). The data in that buffer may contain | |
748 | embedded nulls, but does not contain the final CRLF. When returning | |
749 | 0, LINE is set to null. */ | |
750 | ||
9c0f2dac RS |
751 | int |
752 | pop_multi_next (server, line) | |
753 | popserver server; | |
754 | char **line; | |
755 | { | |
756 | char *fromserver; | |
d89d0243 | 757 | int ret; |
9c0f2dac RS |
758 | |
759 | if (! server->in_multi) | |
760 | { | |
761 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
762 | return (-1); | |
763 | } | |
764 | ||
60b0a379 | 765 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
766 | { |
767 | return (-1); | |
768 | } | |
769 | ||
770 | if (fromserver[0] == '.') | |
771 | { | |
772 | if (! fromserver[1]) | |
773 | { | |
774 | *line = 0; | |
775 | server->in_multi = 0; | |
776 | return (0); | |
777 | } | |
778 | else | |
779 | { | |
780 | *line = fromserver + 1; | |
d89d0243 | 781 | return (ret - 1); |
9c0f2dac RS |
782 | } |
783 | } | |
784 | else | |
785 | { | |
786 | *line = fromserver; | |
d89d0243 | 787 | return (ret); |
9c0f2dac RS |
788 | } |
789 | } | |
790 | ||
791 | int | |
792 | pop_multi_flush (server) | |
793 | popserver server; | |
794 | { | |
795 | char *line; | |
d89d0243 | 796 | int ret; |
9c0f2dac RS |
797 | |
798 | if (! server->in_multi) | |
799 | { | |
800 | return (0); | |
801 | } | |
802 | ||
d89d0243 | 803 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 804 | { |
d89d0243 KH |
805 | if (ret < 0) |
806 | return (-1); | |
9c0f2dac RS |
807 | } |
808 | ||
d89d0243 | 809 | return (0); |
9c0f2dac RS |
810 | } |
811 | ||
812 | /* Function: pop_delete | |
813 | * | |
814 | * Purpose: Delete a specified message. | |
815 | * | |
816 | * Arguments: | |
817 | * server Server from which to delete the message. | |
818 | * message Message to delete. | |
819 | * | |
820 | * Return value: 0 on success, non-zero with error in pop_error | |
821 | * otherwise. | |
822 | */ | |
823 | int | |
824 | pop_delete (server, message) | |
825 | popserver server; | |
826 | int message; | |
827 | { | |
828 | if (server->in_multi) | |
829 | { | |
830 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
831 | return (-1); | |
832 | } | |
833 | ||
834 | sprintf (pop_error, "DELE %d", message); | |
835 | ||
836 | if (sendline (server, pop_error) || getok (server)) | |
837 | return (-1); | |
838 | ||
839 | return (0); | |
840 | } | |
841 | ||
842 | /* | |
843 | * Function: pop_noop | |
844 | * | |
845 | * Purpose: Send a noop command to the server. | |
846 | * | |
847 | * Argument: | |
848 | * server The server to send to. | |
849 | * | |
850 | * Return value: 0 on success, non-zero with error in pop_error | |
851 | * otherwise. | |
852 | * | |
853 | * Side effects: Closes connection on error. | |
854 | */ | |
855 | int | |
856 | pop_noop (server) | |
857 | popserver server; | |
858 | { | |
859 | if (server->in_multi) | |
860 | { | |
861 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
862 | return (-1); | |
863 | } | |
864 | ||
865 | if (sendline (server, "NOOP") || getok (server)) | |
866 | return (-1); | |
867 | ||
868 | return (0); | |
869 | } | |
870 | ||
871 | /* | |
872 | * Function: pop_last | |
873 | * | |
874 | * Purpose: Find out the highest seen message from the server. | |
875 | * | |
876 | * Arguments: | |
877 | * server The server. | |
878 | * | |
879 | * Return value: If successful, the highest seen message, which is | |
880 | * greater than or equal to 0. Otherwise, a negative number with | |
881 | * the error explained in pop_error. | |
882 | * | |
883 | * Side effects: Closes the connection on error. | |
884 | */ | |
885 | int | |
886 | pop_last (server) | |
887 | popserver server; | |
888 | { | |
889 | char *fromserver; | |
80b2cbf2 | 890 | |
9c0f2dac RS |
891 | if (server->in_multi) |
892 | { | |
893 | strcpy (pop_error, "In multi-line query in pop_last"); | |
894 | return (-1); | |
895 | } | |
896 | ||
897 | if (sendline (server, "LAST")) | |
898 | return (-1); | |
899 | ||
60b0a379 | 900 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
901 | return (-1); |
902 | ||
903 | if (! strncmp (fromserver, "-ERR", 4)) | |
904 | { | |
905 | strncpy (pop_error, fromserver, ERROR_MAX); | |
906 | return (-1); | |
907 | } | |
908 | else if (strncmp (fromserver, "+OK ", 4)) | |
909 | { | |
910 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
911 | pop_trash (server); | |
912 | return (-1); | |
913 | } | |
914 | else | |
915 | { | |
916 | return (atoi (&fromserver[4])); | |
917 | } | |
918 | } | |
919 | ||
920 | /* | |
921 | * Function: pop_reset | |
922 | * | |
923 | * Purpose: Reset the server to its initial connect state | |
924 | * | |
925 | * Arguments: | |
926 | * server The server. | |
927 | * | |
928 | * Return value: 0 for success, non-0 with error in pop_error | |
929 | * otherwise. | |
930 | * | |
931 | * Side effects: Closes the connection on error. | |
932 | */ | |
933 | int | |
934 | pop_reset (server) | |
935 | popserver server; | |
936 | { | |
937 | if (pop_retrieve_flush (server)) | |
938 | { | |
939 | return (-1); | |
940 | } | |
941 | ||
942 | if (sendline (server, "RSET") || getok (server)) | |
943 | return (-1); | |
944 | ||
945 | return (0); | |
946 | } | |
947 | ||
948 | /* | |
949 | * Function: pop_quit | |
950 | * | |
951 | * Purpose: Quit the connection to the server, | |
952 | * | |
953 | * Arguments: | |
954 | * server The server to quit. | |
955 | * | |
956 | * Return value: 0 for success, non-zero otherwise with error in | |
957 | * pop_error. | |
958 | * | |
8e6208c5 | 959 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
960 | * function is called, even if an error occurs. |
961 | */ | |
962 | int | |
963 | pop_quit (server) | |
964 | popserver server; | |
965 | { | |
966 | int ret = 0; | |
967 | ||
968 | if (server->file >= 0) | |
969 | { | |
970 | if (pop_retrieve_flush (server)) | |
971 | { | |
972 | ret = -1; | |
973 | } | |
974 | ||
975 | if (sendline (server, "QUIT") || getok (server)) | |
976 | { | |
977 | ret = -1; | |
978 | } | |
979 | ||
980 | close (server->file); | |
981 | } | |
982 | ||
983 | if (server->buffer) | |
984 | free (server->buffer); | |
985 | free ((char *) server); | |
986 | ||
987 | return (ret); | |
988 | } | |
989 | ||
c2668a61 RS |
990 | #ifdef WINDOWSNT |
991 | static int have_winsock = 0; | |
992 | #endif | |
993 | ||
9c0f2dac RS |
994 | /* |
995 | * Function: socket_connection | |
996 | * | |
997 | * Purpose: Opens the network connection with the mail host, without | |
998 | * doing any sort of I/O with it or anything. | |
999 | * | |
1000 | * Arguments: | |
1001 | * host The host to which to connect. | |
1002 | * flags Option flags. | |
80b2cbf2 | 1003 | * |
9c0f2dac RS |
1004 | * Return value: A file descriptor indicating the connection, or -1 |
1005 | * indicating failure, in which case an error has been copied | |
1006 | * into pop_error. | |
1007 | */ | |
1008 | static int | |
1009 | socket_connection (host, flags) | |
1010 | char *host; | |
1011 | int flags; | |
1012 | { | |
1013 | struct hostent *hostent; | |
1014 | struct servent *servent; | |
1015 | struct sockaddr_in addr; | |
1016 | char found_port = 0; | |
1017 | char *service; | |
1018 | int sock; | |
1019 | #ifdef KERBEROS | |
a27738b6 | 1020 | #ifdef KERBEROS5 |
9c0f2dac | 1021 | krb5_error_code rem; |
a27738b6 RS |
1022 | krb5_context kcontext = 0; |
1023 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
1024 | krb5_ccache ccdef; |
1025 | krb5_principal client, server; | |
1026 | krb5_error *err_ret; | |
1027 | register char *cp; | |
1028 | #else | |
1029 | KTEXT ticket; | |
1030 | MSG_DAT msg_data; | |
1031 | CREDENTIALS cred; | |
1032 | Key_schedule schedule; | |
1033 | int rem; | |
51a66525 | 1034 | char *realhost; |
a27738b6 | 1035 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1036 | #endif /* KERBEROS */ |
1037 | ||
1038 | int try_count = 0; | |
1039 | ||
c2668a61 RS |
1040 | #ifdef WINDOWSNT |
1041 | { | |
1042 | WSADATA winsockData; | |
1043 | if (WSAStartup (0x101, &winsockData) == 0) | |
1044 | have_winsock = 1; | |
1045 | } | |
1046 | #endif | |
1047 | ||
9c0f2dac RS |
1048 | bzero ((char *) &addr, sizeof (addr)); |
1049 | addr.sin_family = AF_INET; | |
1050 | ||
81264b38 | 1051 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1052 | #ifdef KERBEROS |
1053 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1054 | #else | |
1055 | service = POP_SERVICE; | |
1056 | #endif | |
1057 | ||
1058 | #ifdef HESIOD | |
1059 | if (! (flags & POP_NO_HESIOD)) | |
1060 | { | |
1061 | servent = hes_getservbyname (service, "tcp"); | |
1062 | if (servent) | |
1063 | { | |
1064 | addr.sin_port = servent->s_port; | |
1065 | found_port = 1; | |
1066 | } | |
1067 | } | |
1068 | #endif | |
1069 | if (! found_port) | |
1070 | { | |
1071 | servent = getservbyname (service, "tcp"); | |
1072 | if (servent) | |
1073 | { | |
1074 | addr.sin_port = servent->s_port; | |
1075 | } | |
1076 | else | |
1077 | { | |
81264b38 | 1078 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
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 | 1096 | return (-1); |
80b2cbf2 | 1097 | |
9c0f2dac RS |
1098 | } |
1099 | ||
b72f3bcb EZ |
1100 | do |
1101 | { | |
1102 | hostent = gethostbyname (host); | |
1103 | try_count++; | |
1104 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1105 | { | |
1106 | strcpy (pop_error, "Could not determine POP server's address"); | |
1107 | return (-1); | |
1108 | } | |
1109 | } while (! hostent); | |
1110 | ||
9c0f2dac RS |
1111 | while (*hostent->h_addr_list) |
1112 | { | |
1113 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1114 | hostent->h_length); | |
1115 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1116 | break; | |
1117 | hostent->h_addr_list++; | |
1118 | } | |
1119 | ||
1120 | #define CONNECT_ERROR "Could not connect to POP server: " | |
80b2cbf2 | 1121 | |
9c0f2dac RS |
1122 | if (! *hostent->h_addr_list) |
1123 | { | |
de5c39cf | 1124 | CLOSESOCKET (sock); |
9c0f2dac RS |
1125 | strcpy (pop_error, CONNECT_ERROR); |
1126 | strncat (pop_error, strerror (errno), | |
1127 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1128 | return (-1); | |
80b2cbf2 | 1129 | |
9c0f2dac RS |
1130 | } |
1131 | ||
1132 | #ifdef KERBEROS | |
1133 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1134 | if (! (flags & POP_NO_KERBEROS)) | |
1135 | { | |
a27738b6 RS |
1136 | #ifdef KERBEROS5 |
1137 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1138 | { |
1139 | krb5error: | |
a27738b6 RS |
1140 | if (auth_context) |
1141 | krb5_auth_con_free (kcontext, auth_context); | |
1142 | if (kcontext) | |
1143 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1144 | strcpy (pop_error, KRB_ERROR); |
1145 | strncat (pop_error, error_message (rem), | |
1146 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1147 | CLOSESOCKET (sock); |
9c0f2dac RS |
1148 | return (-1); |
1149 | } | |
1150 | ||
a27738b6 RS |
1151 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1152 | goto krb5error; | |
80b2cbf2 | 1153 | |
a27738b6 RS |
1154 | if (rem = krb5_cc_default (kcontext, &ccdef)) |
1155 | goto krb5error; | |
1156 | ||
1157 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1158 | goto krb5error; | |
9c0f2dac RS |
1159 | |
1160 | for (cp = hostent->h_name; *cp; cp++) | |
1161 | { | |
1162 | if (isupper (*cp)) | |
1163 | { | |
1164 | *cp = tolower (*cp); | |
1165 | } | |
1166 | } | |
1167 | ||
a27738b6 RS |
1168 | if (rem = krb5_sname_to_principal (kcontext, hostent->h_name, |
1169 | POP_SERVICE, FALSE, &server)) | |
1170 | goto krb5error; | |
9c0f2dac | 1171 | |
a27738b6 RS |
1172 | rem = krb5_sendauth (kcontext, &auth_context, |
1173 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1174 | AP_OPTS_MUTUAL_REQUIRED, |
1175 | 0, /* no checksum */ | |
1176 | 0, /* no creds, use ccache instead */ | |
1177 | ccdef, | |
9c0f2dac | 1178 | &err_ret, |
a27738b6 | 1179 | 0, /* don't need subsession key */ |
9c0f2dac | 1180 | 0); /* don't need reply */ |
a27738b6 | 1181 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1182 | if (rem) |
1183 | { | |
1184 | if (err_ret && err_ret->text.length) | |
1185 | { | |
1186 | strcpy (pop_error, KRB_ERROR); | |
1187 | strncat (pop_error, error_message (rem), | |
1188 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1189 | strncat (pop_error, " [server says '", | |
1190 | ERROR_MAX - strlen (pop_error) - 1); | |
1191 | strncat (pop_error, err_ret->text.data, | |
1192 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1193 | err_ret->text.length)); | |
1194 | strncat (pop_error, "']", | |
1195 | ERROR_MAX - strlen (pop_error) - 1); | |
1196 | } | |
1197 | else | |
1198 | { | |
1199 | strcpy (pop_error, KRB_ERROR); | |
1200 | strncat (pop_error, error_message (rem), | |
1201 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1202 | } | |
1203 | if (err_ret) | |
a27738b6 RS |
1204 | krb5_free_error (kcontext, err_ret); |
1205 | krb5_auth_con_free (kcontext, auth_context); | |
1206 | krb5_free_context (kcontext); | |
9c0f2dac | 1207 | |
de5c39cf | 1208 | CLOSESOCKET (sock); |
9c0f2dac RS |
1209 | return (-1); |
1210 | } | |
80b2cbf2 | 1211 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1212 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1213 | realhost = strdup (hostent->h_name); |
1214 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, | |
1215 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1216 | (unsigned long) 0, &msg_data, &cred, schedule, |
1217 | (struct sockaddr_in *) 0, | |
1218 | (struct sockaddr_in *) 0, | |
1219 | "KPOPV0.1"); | |
1220 | free ((char *) ticket); | |
6a7eabe0 | 1221 | free (realhost); |
9c0f2dac RS |
1222 | if (rem != KSUCCESS) |
1223 | { | |
1224 | strcpy (pop_error, KRB_ERROR); | |
1225 | strncat (pop_error, krb_err_txt[rem], | |
1226 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1227 | CLOSESOCKET (sock); |
9c0f2dac RS |
1228 | return (-1); |
1229 | } | |
a27738b6 | 1230 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1231 | } |
1232 | #endif /* KERBEROS */ | |
1233 | ||
1234 | return (sock); | |
1235 | } /* socket_connection */ | |
1236 | ||
1237 | /* | |
60b0a379 | 1238 | * Function: pop_getline |
9c0f2dac RS |
1239 | * |
1240 | * Purpose: Get a line of text from the connection and return a | |
1241 | * pointer to it. The carriage return and linefeed at the end of | |
1242 | * the line are stripped, but periods at the beginnings of lines | |
1243 | * are NOT dealt with in any special way. | |
1244 | * | |
1245 | * Arguments: | |
1246 | * server The server from which to get the line of text. | |
1247 | * | |
d89d0243 KH |
1248 | * Returns: The number of characters in the line, which is returned in |
1249 | * LINE, not including the final null. A return value of 0 | |
1250 | * indicates a blank line. A negative return value indicates an | |
1251 | * error (in which case the contents of LINE are undefined. In | |
1252 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1253 | * |
60b0a379 | 1254 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1255 | * |
1256 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1257 | * |
1258 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1259 | */ |
d89d0243 | 1260 | static int |
60b0a379 | 1261 | pop_getline (server, line) |
9c0f2dac | 1262 | popserver server; |
d89d0243 | 1263 | char **line; |
9c0f2dac RS |
1264 | { |
1265 | #define GETLINE_ERROR "Error reading from server: " | |
1266 | ||
1267 | int ret; | |
b6606ad8 RS |
1268 | int search_offset = 0; |
1269 | ||
9c0f2dac RS |
1270 | if (server->data) |
1271 | { | |
d89d0243 KH |
1272 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1273 | server->data); | |
9c0f2dac RS |
1274 | if (cp) |
1275 | { | |
1276 | int found; | |
1277 | int data_used; | |
1278 | ||
1279 | found = server->buffer_index; | |
1280 | data_used = (cp + 2) - server->buffer - found; | |
80b2cbf2 | 1281 | |
9c0f2dac RS |
1282 | *cp = '\0'; /* terminate the string to be returned */ |
1283 | server->data -= data_used; | |
1284 | server->buffer_index += data_used; | |
1285 | ||
1286 | if (pop_debug) | |
d89d0243 KH |
1287 | /* Embedded nulls will truncate this output prematurely, |
1288 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1289 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1290 | *line = server->buffer + found; |
1291 | return (data_used - 2); | |
9c0f2dac RS |
1292 | } |
1293 | else | |
1294 | { | |
1295 | bcopy (server->buffer + server->buffer_index, | |
1296 | server->buffer, server->data); | |
b6606ad8 RS |
1297 | /* Record the fact that we've searched the data already in |
1298 | the buffer for a CRLF, so that when we search below, we | |
1299 | don't have to search the same data twice. There's a "- | |
1300 | 1" here to account for the fact that the last character | |
1301 | of the data we have may be the CR of a CRLF pair, of | |
1302 | which we haven't read the second half yet, so we may have | |
1303 | to search it again when we read more data. */ | |
1304 | search_offset = server->data - 1; | |
9c0f2dac RS |
1305 | server->buffer_index = 0; |
1306 | } | |
1307 | } | |
1308 | else | |
1309 | { | |
1310 | server->buffer_index = 0; | |
1311 | } | |
1312 | ||
1313 | while (1) | |
1314 | { | |
bbcac09c RS |
1315 | /* There's a "- 1" here to leave room for the null that we put |
1316 | at the end of the read data below. We put the null there so | |
1317 | that find_crlf knows where to stop when we call it. */ | |
1318 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1319 | { |
bbcac09c RS |
1320 | server->buffer_size += GETLINE_INCR; |
1321 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1322 | if (! server->buffer) | |
9c0f2dac | 1323 | { |
bbcac09c RS |
1324 | strcpy (pop_error, "Out of memory in pop_getline"); |
1325 | pop_trash (server); | |
1326 | return (-1); | |
0ea95737 | 1327 | } |
0ea95737 | 1328 | } |
bbcac09c RS |
1329 | ret = RECV (server->file, server->buffer + server->data, |
1330 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1331 | if (ret < 0) |
1332 | { | |
1333 | strcpy (pop_error, GETLINE_ERROR); | |
1334 | strncat (pop_error, strerror (errno), | |
1335 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1336 | pop_trash (server); | |
d89d0243 | 1337 | return (-1); |
9c0f2dac RS |
1338 | } |
1339 | else if (ret == 0) | |
1340 | { | |
60b0a379 | 1341 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1342 | pop_trash (server); |
d89d0243 | 1343 | return (-1); |
9c0f2dac RS |
1344 | } |
1345 | else | |
1346 | { | |
7a481e50 | 1347 | char *cp; |
9c0f2dac | 1348 | server->data += ret; |
7a481e50 | 1349 | server->buffer[server->data] = '\0'; |
80b2cbf2 | 1350 | |
d89d0243 KH |
1351 | cp = find_crlf (server->buffer + search_offset, |
1352 | server->data - search_offset); | |
9c0f2dac RS |
1353 | if (cp) |
1354 | { | |
1355 | int data_used = (cp + 2) - server->buffer; | |
1356 | *cp = '\0'; | |
1357 | server->data -= data_used; | |
1358 | server->buffer_index = data_used; | |
1359 | ||
1360 | if (pop_debug) | |
1361 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1362 | *line = server->buffer; |
1363 | return (data_used - 2); | |
9c0f2dac | 1364 | } |
a8f44d07 RS |
1365 | /* As above, the "- 1" here is to account for the fact that |
1366 | we may have read a CR without its accompanying LF. */ | |
1367 | search_offset += ret - 1; | |
9c0f2dac RS |
1368 | } |
1369 | } | |
1370 | ||
1371 | /* NOTREACHED */ | |
1372 | } | |
1373 | ||
1374 | /* | |
1375 | * Function: sendline | |
1376 | * | |
1377 | * Purpose: Sends a line of text to the POP server. The line of text | |
1378 | * passed into this function should NOT have the carriage return | |
1379 | * and linefeed on the end of it. Periods at beginnings of lines | |
1380 | * will NOT be treated specially by this function. | |
1381 | * | |
1382 | * Arguments: | |
1383 | * server The server to which to send the text. | |
1384 | * line The line of text to send. | |
1385 | * | |
1386 | * Return value: Upon successful completion, a value of 0 will be | |
1387 | * returned. Otherwise, a non-zero value will be returned, and | |
1388 | * an error will be copied into pop_error. | |
1389 | * | |
1390 | * Side effects: Closes the connection on error. | |
1391 | */ | |
1392 | static int | |
1393 | sendline (server, line) | |
1394 | popserver server; | |
1395 | char *line; | |
1396 | { | |
1397 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1398 | int ret; | |
ec641d50 KR |
1399 | char *buf; |
1400 | ||
1401 | /* Combine the string and the CR-LF into one buffer. Otherwise, two | |
1402 | reasonable network stack optimizations, Nagle's algorithm and | |
1403 | delayed acks, combine to delay us a fraction of a second on every | |
1404 | message we send. (Movemail writes line without \r\n, client | |
1405 | kernel sends packet, server kernel delays the ack to see if it | |
1406 | can combine it with data, movemail writes \r\n, client kernel | |
1407 | waits because it has unacked data already in its outgoing queue, | |
1408 | client kernel eventually times out and sends.) | |
1409 | ||
1410 | This can be something like 0.2s per command, which can add up | |
1411 | over a few dozen messages, and is a big chunk of the time we | |
1412 | spend fetching mail from a server close by. */ | |
1413 | buf = alloca (strlen (line) + 3); | |
1414 | strcpy (buf, line); | |
1415 | strcat (buf, "\r\n"); | |
1416 | ret = fullwrite (server->file, buf, strlen (buf)); | |
9c0f2dac RS |
1417 | |
1418 | if (ret < 0) | |
1419 | { | |
1420 | pop_trash (server); | |
1421 | strcpy (pop_error, SENDLINE_ERROR); | |
1422 | strncat (pop_error, strerror (errno), | |
1423 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1424 | return (ret); | |
1425 | } | |
1426 | ||
1427 | if (pop_debug) | |
1428 | fprintf (stderr, ">>> %s\n", line); | |
1429 | ||
1430 | return (0); | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * Procedure: fullwrite | |
1435 | * | |
1436 | * Purpose: Just like write, but keeps trying until the entire string | |
1437 | * has been written. | |
1438 | * | |
1439 | * Return value: Same as write. Pop_error is not set. | |
1440 | */ | |
1441 | static int | |
1442 | fullwrite (fd, buf, nbytes) | |
1443 | int fd; | |
1444 | char *buf; | |
1445 | int nbytes; | |
1446 | { | |
1447 | char *cp; | |
9d3f4cee | 1448 | int ret = 0; |
9c0f2dac RS |
1449 | |
1450 | cp = buf; | |
9d3f4cee | 1451 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1452 | { |
1453 | cp += ret; | |
1454 | nbytes -= ret; | |
1455 | } | |
1456 | ||
1457 | return (ret); | |
1458 | } | |
1459 | ||
1460 | /* | |
1461 | * Procedure getok | |
1462 | * | |
1463 | * Purpose: Reads a line from the server. If the return indicator is | |
1464 | * positive, return with a zero exit status. If not, return with | |
1465 | * a negative exit status. | |
1466 | * | |
1467 | * Arguments: | |
1468 | * server The server to read from. | |
80b2cbf2 | 1469 | * |
9c0f2dac RS |
1470 | * Returns: 0 for success, else for failure and puts error in pop_error. |
1471 | * | |
8e6208c5 | 1472 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1473 | */ |
1474 | static int | |
1475 | getok (server) | |
1476 | popserver server; | |
1477 | { | |
1478 | char *fromline; | |
1479 | ||
60b0a379 | 1480 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1481 | { |
1482 | return (-1); | |
1483 | } | |
1484 | ||
1485 | if (! strncmp (fromline, "+OK", 3)) | |
1486 | return (0); | |
1487 | else if (! strncmp (fromline, "-ERR", 4)) | |
1488 | { | |
1489 | strncpy (pop_error, fromline, ERROR_MAX); | |
1490 | pop_error[ERROR_MAX-1] = '\0'; | |
1491 | return (-1); | |
1492 | } | |
1493 | else | |
1494 | { | |
1495 | strcpy (pop_error, | |
1496 | "Unexpected response from server; expecting +OK or -ERR"); | |
1497 | pop_trash (server); | |
1498 | return (-1); | |
1499 | } | |
80b2cbf2 | 1500 | } |
9c0f2dac RS |
1501 | |
1502 | #if 0 | |
1503 | /* | |
1504 | * Function: gettermination | |
1505 | * | |
1506 | * Purpose: Gets the next line and verifies that it is a termination | |
1507 | * line (nothing but a dot). | |
1508 | * | |
1509 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1510 | * | |
1511 | * Side effects: Closes the connection on error. | |
1512 | */ | |
1513 | static int | |
1514 | gettermination (server) | |
1515 | popserver server; | |
1516 | { | |
1517 | char *fromserver; | |
1518 | ||
60b0a379 | 1519 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1520 | return (-1); |
1521 | ||
1522 | if (strcmp (fromserver, ".")) | |
1523 | { | |
1524 | strcpy (pop_error, | |
1525 | "Unexpected response from server in gettermination"); | |
1526 | pop_trash (server); | |
1527 | return (-1); | |
1528 | } | |
1529 | ||
1530 | return (0); | |
1531 | } | |
1532 | #endif | |
1533 | ||
1534 | /* | |
1535 | * Function pop_close | |
1536 | * | |
1537 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1538 | * preserve any changes that were made and a "QUIT" command to | |
1539 | * try to get the server to quit, but ignoring any responses that | |
1540 | * are received. | |
1541 | * | |
8e6208c5 | 1542 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1543 | * Changes made to the maildrop since the session was started (or |
1544 | * since the last pop_reset) may be lost. | |
1545 | */ | |
80b2cbf2 | 1546 | void |
9c0f2dac RS |
1547 | pop_close (server) |
1548 | popserver server; | |
1549 | { | |
1550 | pop_trash (server); | |
1551 | free ((char *) server); | |
1552 | ||
1553 | return; | |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | * Function: pop_trash | |
1558 | * | |
1559 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1560 | * memory associated with the server. It is legal to call | |
1561 | * pop_close or pop_quit after this function has been called. | |
1562 | */ | |
1563 | static void | |
1564 | pop_trash (server) | |
1565 | popserver server; | |
1566 | { | |
1567 | if (server->file >= 0) | |
1568 | { | |
c2668a61 RS |
1569 | /* avoid recursion; sendline can call pop_trash */ |
1570 | if (server->trash_started) | |
1571 | return; | |
1572 | server->trash_started = 1; | |
de5c39cf | 1573 | |
9c0f2dac RS |
1574 | sendline (server, "RSET"); |
1575 | sendline (server, "QUIT"); | |
1576 | ||
de5c39cf | 1577 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1578 | server->file = -1; |
1579 | if (server->buffer) | |
1580 | { | |
1581 | free (server->buffer); | |
1582 | server->buffer = 0; | |
1583 | } | |
1584 | } | |
c2668a61 RS |
1585 | |
1586 | #ifdef WINDOWSNT | |
1587 | if (have_winsock) | |
1588 | WSACleanup (); | |
1589 | #endif | |
9c0f2dac RS |
1590 | } |
1591 | ||
d89d0243 KH |
1592 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1593 | embedded nulls and has LEN characters in it not including the final | |
1594 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1595 | |
1596 | static char * | |
d89d0243 | 1597 | find_crlf (in_string, len) |
8148baf9 | 1598 | char *in_string; |
d89d0243 | 1599 | int len; |
9c0f2dac | 1600 | { |
d89d0243 | 1601 | while (len--) |
9c0f2dac | 1602 | { |
d89d0243 | 1603 | if (*in_string == '\r') |
8148baf9 RS |
1604 | { |
1605 | if (*++in_string == '\n') | |
1606 | return (in_string - 1); | |
1607 | } | |
1608 | else | |
1609 | in_string++; | |
9c0f2dac | 1610 | } |
d89d0243 | 1611 | return (0); |
9c0f2dac RS |
1612 | } |
1613 | ||
1614 | #endif /* MAIL_USE_POP */ | |
ab5796a9 MB |
1615 | |
1616 | /* arch-tag: ceb37041-b7ad-49a8-a63d-286618b8367d | |
1617 | (do not change this comment) */ |