Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
b3d90e46 | 2 | Copyright (C) 1991, 1993, 1996, 1997, 1999, 2001, 2002, 2003, 2004, |
a5b68355 | 3 | 2005, 2006, 2007, 2008 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; | |
0b074993 | 355 | char *end_ptr; |
9c0f2dac RS |
356 | |
357 | if (server->in_multi) | |
358 | { | |
359 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
360 | return (-1); | |
361 | } | |
80b2cbf2 | 362 | |
60b0a379 | 363 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
364 | return (-1); |
365 | ||
366 | if (strncmp (fromserver, "+OK ", 4)) | |
367 | { | |
368 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
369 | { | |
370 | strncpy (pop_error, fromserver, ERROR_MAX); | |
371 | } | |
372 | else | |
373 | { | |
374 | strcpy (pop_error, | |
375 | "Unexpected response from POP server in pop_stat"); | |
376 | pop_trash (server); | |
377 | } | |
378 | return (-1); | |
379 | } | |
380 | ||
0b074993 CY |
381 | errno = 0; |
382 | *count = strtol (&fromserver[4], &end_ptr, 10); | |
383 | /* Check validity of string-to-integer conversion. */ | |
384 | if (fromserver[4] == 0 || *end_ptr != 0 || errno) | |
385 | { | |
386 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
387 | pop_trash (server); | |
388 | return (-1); | |
389 | } | |
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 | ||
0b074993 CY |
400 | errno = 0; |
401 | *size = strtol (fromserver + 1, &end_ptr, 10); | |
402 | if (*(fromserver + 1) == 0 || *end_ptr != 0 || errno) | |
403 | { | |
404 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
405 | pop_trash (server); | |
406 | return (-1); | |
407 | } | |
9c0f2dac RS |
408 | |
409 | return (0); | |
410 | } | |
411 | ||
412 | /* | |
413 | * Function: pop_list | |
414 | * | |
415 | * Purpose: Performs the POP "list" command and returns (in value | |
416 | * parameters) two malloc'd zero-terminated arrays -- one of | |
417 | * message IDs, and a parallel one of sizes. | |
418 | * | |
419 | * Arguments: | |
420 | * server The pop connection to talk to. | |
421 | * message The number of the one message about which to get | |
422 | * information, or 0 to get information about all | |
423 | * messages. | |
424 | * | |
425 | * Return value: 0 on success, non-zero with error in pop_error on | |
426 | * failure. | |
427 | * | |
428 | * Side effects: On failure, may make further operations on the | |
429 | * connection impossible. | |
430 | */ | |
431 | int | |
432 | pop_list (server, message, IDs, sizes) | |
433 | popserver server; | |
434 | int message; | |
435 | int **IDs; | |
436 | int **sizes; | |
437 | { | |
438 | int how_many, i; | |
439 | char *fromserver; | |
440 | ||
441 | if (server->in_multi) | |
442 | { | |
443 | strcpy (pop_error, "In multi-line query in pop_list"); | |
444 | return (-1); | |
445 | } | |
446 | ||
447 | if (message) | |
448 | how_many = 1; | |
449 | else | |
450 | { | |
451 | int count, size; | |
452 | if (pop_stat (server, &count, &size)) | |
453 | return (-1); | |
454 | how_many = count; | |
455 | } | |
456 | ||
457 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
458 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
459 | if (! (*IDs && *sizes)) | |
460 | { | |
461 | strcpy (pop_error, "Out of memory in pop_list"); | |
462 | return (-1); | |
463 | } | |
464 | ||
465 | if (message) | |
466 | { | |
467 | sprintf (pop_error, "LIST %d", message); | |
468 | if (sendline (server, pop_error)) | |
469 | { | |
470 | free ((char *) *IDs); | |
471 | free ((char *) *sizes); | |
472 | return (-1); | |
473 | } | |
60b0a379 | 474 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
475 | { |
476 | free ((char *) *IDs); | |
477 | free ((char *) *sizes); | |
478 | return (-1); | |
479 | } | |
480 | if (strncmp (fromserver, "+OK ", 4)) | |
481 | { | |
482 | if (! strncmp (fromserver, "-ERR", 4)) | |
483 | strncpy (pop_error, fromserver, ERROR_MAX); | |
484 | else | |
485 | { | |
486 | strcpy (pop_error, | |
487 | "Unexpected response from server in pop_list"); | |
488 | pop_trash (server); | |
489 | } | |
490 | free ((char *) *IDs); | |
491 | free ((char *) *sizes); | |
492 | return (-1); | |
493 | } | |
494 | (*IDs)[0] = atoi (&fromserver[4]); | |
495 | fromserver = index (&fromserver[4], ' '); | |
496 | if (! fromserver) | |
497 | { | |
498 | strcpy (pop_error, | |
499 | "Badly formatted response from server in pop_list"); | |
500 | pop_trash (server); | |
501 | free ((char *) *IDs); | |
502 | free ((char *) *sizes); | |
503 | return (-1); | |
504 | } | |
505 | (*sizes)[0] = atoi (fromserver); | |
506 | (*IDs)[1] = (*sizes)[1] = 0; | |
507 | return (0); | |
508 | } | |
509 | else | |
510 | { | |
511 | if (pop_multi_first (server, "LIST", &fromserver)) | |
512 | { | |
513 | free ((char *) *IDs); | |
514 | free ((char *) *sizes); | |
515 | return (-1); | |
516 | } | |
517 | for (i = 0; i < how_many; i++) | |
518 | { | |
d89d0243 | 519 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
520 | { |
521 | free ((char *) *IDs); | |
522 | free ((char *) *sizes); | |
523 | return (-1); | |
524 | } | |
525 | (*IDs)[i] = atoi (fromserver); | |
526 | fromserver = index (fromserver, ' '); | |
527 | if (! fromserver) | |
528 | { | |
529 | strcpy (pop_error, | |
530 | "Badly formatted response from server in pop_list"); | |
531 | free ((char *) *IDs); | |
532 | free ((char *) *sizes); | |
533 | pop_trash (server); | |
534 | return (-1); | |
535 | } | |
536 | (*sizes)[i] = atoi (fromserver); | |
537 | } | |
d89d0243 | 538 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
539 | { |
540 | free ((char *) *IDs); | |
541 | free ((char *) *sizes); | |
542 | return (-1); | |
543 | } | |
544 | else if (fromserver) | |
545 | { | |
546 | strcpy (pop_error, | |
547 | "Too many response lines from server in pop_list"); | |
548 | free ((char *) *IDs); | |
549 | free ((char *) *sizes); | |
550 | return (-1); | |
551 | } | |
552 | (*IDs)[i] = (*sizes)[i] = 0; | |
553 | return (0); | |
554 | } | |
555 | } | |
556 | ||
557 | /* | |
558 | * Function: pop_retrieve | |
559 | * | |
560 | * Purpose: Retrieve a specified message from the maildrop. | |
561 | * | |
562 | * Arguments: | |
563 | * server The server to retrieve from. | |
564 | * message The message number to retrieve. | |
565 | * markfrom | |
566 | * If true, then mark the string "From " at the beginning | |
567 | * of lines with '>'. | |
d89d0243 KH |
568 | * msg_buf Output parameter to which a buffer containing the |
569 | * message is assigned. | |
177c0ea7 | 570 | * |
d89d0243 KH |
571 | * Return value: The number of bytes in msg_buf, which may contain |
572 | * embedded nulls, not including its final null, or -1 on error | |
573 | * with pop_error set. | |
9c0f2dac RS |
574 | * |
575 | * Side effects: May kill connection on error. | |
576 | */ | |
d89d0243 KH |
577 | int |
578 | pop_retrieve (server, message, markfrom, msg_buf) | |
9c0f2dac RS |
579 | popserver server; |
580 | int message; | |
581 | int markfrom; | |
d89d0243 | 582 | char **msg_buf; |
9c0f2dac RS |
583 | { |
584 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
585 | char *ptr, *fromserver; | |
586 | int ret; | |
587 | ||
588 | if (server->in_multi) | |
589 | { | |
590 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 591 | return (-1); |
9c0f2dac RS |
592 | } |
593 | ||
594 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 595 | return (-1); |
9c0f2dac RS |
596 | |
597 | if (pop_retrieve_first (server, message, &fromserver)) | |
598 | { | |
d89d0243 | 599 | return (-1); |
9c0f2dac RS |
600 | } |
601 | ||
602 | /* | |
603 | * The "5" below is an arbitrary constant -- I assume that if | |
604 | * there are "From" lines in the text to be marked, there | |
605 | * probably won't be more than 5 of them. If there are, I | |
606 | * allocate more space for them below. | |
607 | */ | |
608 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 609 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
610 | free ((char *) IDs); |
611 | free ((char *) sizes); | |
612 | ||
613 | if (! ptr) | |
614 | { | |
615 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
616 | pop_retrieve_flush (server); | |
d89d0243 | 617 | return (-1); |
9c0f2dac RS |
618 | } |
619 | ||
d89d0243 | 620 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 621 | { |
9c0f2dac RS |
622 | if (! fromserver) |
623 | { | |
624 | ptr[cp] = '\0'; | |
d89d0243 KH |
625 | *msg_buf = ptr; |
626 | return (cp); | |
9c0f2dac RS |
627 | } |
628 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
629 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
630 | fromserver[4] == ' ') | |
631 | { | |
632 | if (++fromcount == 5) | |
633 | { | |
634 | bufsize += 5; | |
7d665945 | 635 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
636 | if (! ptr) |
637 | { | |
638 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
639 | pop_retrieve_flush (server); | |
d89d0243 | 640 | return (-1); |
9c0f2dac RS |
641 | } |
642 | fromcount = 0; | |
643 | } | |
644 | ptr[cp++] = '>'; | |
645 | } | |
d89d0243 KH |
646 | bcopy (fromserver, &ptr[cp], ret); |
647 | cp += ret; | |
9c0f2dac RS |
648 | ptr[cp++] = '\n'; |
649 | } | |
650 | ||
d89d0243 KH |
651 | free (ptr); |
652 | return (-1); | |
177c0ea7 | 653 | } |
9c0f2dac RS |
654 | |
655 | int | |
656 | pop_retrieve_first (server, message, response) | |
657 | popserver server; | |
658 | int message; | |
659 | char **response; | |
660 | { | |
661 | sprintf (pop_error, "RETR %d", message); | |
662 | return (pop_multi_first (server, pop_error, response)); | |
663 | } | |
664 | ||
d89d0243 KH |
665 | /* |
666 | Returns a negative number on error, 0 to indicate that the data has | |
667 | all been read (i.e., the server has returned a "." termination | |
668 | line), or a positive number indicating the number of bytes in the | |
669 | returned buffer (which is null-terminated and may contain embedded | |
670 | nulls, but the returned bytecount doesn't include the final null). | |
671 | */ | |
672 | ||
9c0f2dac RS |
673 | int |
674 | pop_retrieve_next (server, line) | |
675 | popserver server; | |
676 | char **line; | |
677 | { | |
678 | return (pop_multi_next (server, line)); | |
679 | } | |
680 | ||
681 | int | |
682 | pop_retrieve_flush (server) | |
683 | popserver server; | |
684 | { | |
685 | return (pop_multi_flush (server)); | |
686 | } | |
687 | ||
688 | int | |
689 | pop_top_first (server, message, lines, response) | |
690 | popserver server; | |
691 | int message, lines; | |
692 | char **response; | |
693 | { | |
694 | sprintf (pop_error, "TOP %d %d", message, lines); | |
695 | return (pop_multi_first (server, pop_error, response)); | |
696 | } | |
697 | ||
d89d0243 KH |
698 | /* |
699 | Returns a negative number on error, 0 to indicate that the data has | |
700 | all been read (i.e., the server has returned a "." termination | |
701 | line), or a positive number indicating the number of bytes in the | |
702 | returned buffer (which is null-terminated and may contain embedded | |
703 | nulls, but the returned bytecount doesn't include the final null). | |
704 | */ | |
705 | ||
9c0f2dac RS |
706 | int |
707 | pop_top_next (server, line) | |
708 | popserver server; | |
709 | char **line; | |
710 | { | |
711 | return (pop_multi_next (server, line)); | |
712 | } | |
713 | ||
714 | int | |
715 | pop_top_flush (server) | |
716 | popserver server; | |
717 | { | |
718 | return (pop_multi_flush (server)); | |
719 | } | |
720 | ||
721 | int | |
722 | pop_multi_first (server, command, response) | |
723 | popserver server; | |
724 | char *command; | |
725 | char **response; | |
726 | { | |
727 | if (server->in_multi) | |
728 | { | |
729 | strcpy (pop_error, | |
730 | "Already in multi-line query in pop_multi_first"); | |
731 | return (-1); | |
732 | } | |
733 | ||
60b0a379 | 734 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
735 | { |
736 | return (-1); | |
737 | } | |
738 | ||
739 | if (0 == strncmp (*response, "-ERR", 4)) | |
740 | { | |
741 | strncpy (pop_error, *response, ERROR_MAX); | |
742 | return (-1); | |
743 | } | |
744 | else if (0 == strncmp (*response, "+OK", 3)) | |
745 | { | |
746 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
747 | server->in_multi = 1; | |
748 | return (0); | |
749 | } | |
750 | else | |
751 | { | |
752 | strcpy (pop_error, | |
753 | "Unexpected response from server in pop_multi_first"); | |
754 | return (-1); | |
755 | } | |
756 | } | |
757 | ||
d89d0243 KH |
758 | /* |
759 | Read the next line of data from SERVER and place a pointer to it | |
760 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
761 | (i.e., the server has returned a line containing only "."), or a | |
762 | positive number indicating the number of bytes in the LINE buffer | |
763 | (not including the final null). The data in that buffer may contain | |
764 | embedded nulls, but does not contain the final CRLF. When returning | |
765 | 0, LINE is set to null. */ | |
766 | ||
9c0f2dac RS |
767 | int |
768 | pop_multi_next (server, line) | |
769 | popserver server; | |
770 | char **line; | |
771 | { | |
772 | char *fromserver; | |
d89d0243 | 773 | int ret; |
9c0f2dac RS |
774 | |
775 | if (! server->in_multi) | |
776 | { | |
777 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
778 | return (-1); | |
779 | } | |
780 | ||
60b0a379 | 781 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
782 | { |
783 | return (-1); | |
784 | } | |
785 | ||
786 | if (fromserver[0] == '.') | |
787 | { | |
788 | if (! fromserver[1]) | |
789 | { | |
790 | *line = 0; | |
791 | server->in_multi = 0; | |
792 | return (0); | |
793 | } | |
794 | else | |
795 | { | |
796 | *line = fromserver + 1; | |
d89d0243 | 797 | return (ret - 1); |
9c0f2dac RS |
798 | } |
799 | } | |
800 | else | |
801 | { | |
802 | *line = fromserver; | |
d89d0243 | 803 | return (ret); |
9c0f2dac RS |
804 | } |
805 | } | |
806 | ||
807 | int | |
808 | pop_multi_flush (server) | |
809 | popserver server; | |
810 | { | |
811 | char *line; | |
d89d0243 | 812 | int ret; |
9c0f2dac RS |
813 | |
814 | if (! server->in_multi) | |
815 | { | |
816 | return (0); | |
817 | } | |
818 | ||
d89d0243 | 819 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 820 | { |
d89d0243 KH |
821 | if (ret < 0) |
822 | return (-1); | |
9c0f2dac RS |
823 | } |
824 | ||
d89d0243 | 825 | return (0); |
9c0f2dac RS |
826 | } |
827 | ||
828 | /* Function: pop_delete | |
829 | * | |
830 | * Purpose: Delete a specified message. | |
831 | * | |
832 | * Arguments: | |
833 | * server Server from which to delete the message. | |
834 | * message Message to delete. | |
835 | * | |
836 | * Return value: 0 on success, non-zero with error in pop_error | |
837 | * otherwise. | |
838 | */ | |
839 | int | |
840 | pop_delete (server, message) | |
841 | popserver server; | |
842 | int message; | |
843 | { | |
844 | if (server->in_multi) | |
845 | { | |
846 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
847 | return (-1); | |
848 | } | |
849 | ||
850 | sprintf (pop_error, "DELE %d", message); | |
851 | ||
852 | if (sendline (server, pop_error) || getok (server)) | |
853 | return (-1); | |
854 | ||
855 | return (0); | |
856 | } | |
857 | ||
858 | /* | |
859 | * Function: pop_noop | |
860 | * | |
861 | * Purpose: Send a noop command to the server. | |
862 | * | |
863 | * Argument: | |
864 | * server The server to send to. | |
865 | * | |
866 | * Return value: 0 on success, non-zero with error in pop_error | |
867 | * otherwise. | |
868 | * | |
869 | * Side effects: Closes connection on error. | |
870 | */ | |
871 | int | |
872 | pop_noop (server) | |
873 | popserver server; | |
874 | { | |
875 | if (server->in_multi) | |
876 | { | |
877 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
878 | return (-1); | |
879 | } | |
880 | ||
881 | if (sendline (server, "NOOP") || getok (server)) | |
882 | return (-1); | |
883 | ||
884 | return (0); | |
885 | } | |
886 | ||
887 | /* | |
888 | * Function: pop_last | |
889 | * | |
890 | * Purpose: Find out the highest seen message from the server. | |
891 | * | |
892 | * Arguments: | |
893 | * server The server. | |
894 | * | |
895 | * Return value: If successful, the highest seen message, which is | |
896 | * greater than or equal to 0. Otherwise, a negative number with | |
897 | * the error explained in pop_error. | |
898 | * | |
899 | * Side effects: Closes the connection on error. | |
900 | */ | |
901 | int | |
902 | pop_last (server) | |
903 | popserver server; | |
904 | { | |
905 | char *fromserver; | |
80b2cbf2 | 906 | |
9c0f2dac RS |
907 | if (server->in_multi) |
908 | { | |
909 | strcpy (pop_error, "In multi-line query in pop_last"); | |
910 | return (-1); | |
911 | } | |
912 | ||
913 | if (sendline (server, "LAST")) | |
914 | return (-1); | |
915 | ||
60b0a379 | 916 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
917 | return (-1); |
918 | ||
919 | if (! strncmp (fromserver, "-ERR", 4)) | |
920 | { | |
921 | strncpy (pop_error, fromserver, ERROR_MAX); | |
922 | return (-1); | |
923 | } | |
924 | else if (strncmp (fromserver, "+OK ", 4)) | |
925 | { | |
926 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
927 | pop_trash (server); | |
928 | return (-1); | |
929 | } | |
930 | else | |
931 | { | |
0b074993 CY |
932 | char *end_ptr; |
933 | int count; | |
934 | errno = 0; | |
935 | count = strtol (&fromserver[4], &end_ptr, 10); | |
936 | if (fromserver[4] == 0 || *end_ptr != 0 || errno) | |
937 | { | |
938 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
939 | pop_trash (server); | |
940 | return (-1); | |
941 | } | |
942 | return count; | |
9c0f2dac RS |
943 | } |
944 | } | |
945 | ||
946 | /* | |
947 | * Function: pop_reset | |
948 | * | |
949 | * Purpose: Reset the server to its initial connect state | |
950 | * | |
951 | * Arguments: | |
952 | * server The server. | |
953 | * | |
954 | * Return value: 0 for success, non-0 with error in pop_error | |
955 | * otherwise. | |
956 | * | |
957 | * Side effects: Closes the connection on error. | |
958 | */ | |
959 | int | |
960 | pop_reset (server) | |
961 | popserver server; | |
962 | { | |
963 | if (pop_retrieve_flush (server)) | |
964 | { | |
965 | return (-1); | |
966 | } | |
967 | ||
968 | if (sendline (server, "RSET") || getok (server)) | |
969 | return (-1); | |
970 | ||
971 | return (0); | |
972 | } | |
973 | ||
974 | /* | |
975 | * Function: pop_quit | |
976 | * | |
977 | * Purpose: Quit the connection to the server, | |
978 | * | |
979 | * Arguments: | |
980 | * server The server to quit. | |
981 | * | |
982 | * Return value: 0 for success, non-zero otherwise with error in | |
983 | * pop_error. | |
984 | * | |
8e6208c5 | 985 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
986 | * function is called, even if an error occurs. |
987 | */ | |
988 | int | |
989 | pop_quit (server) | |
990 | popserver server; | |
991 | { | |
992 | int ret = 0; | |
993 | ||
994 | if (server->file >= 0) | |
995 | { | |
996 | if (pop_retrieve_flush (server)) | |
997 | { | |
998 | ret = -1; | |
999 | } | |
1000 | ||
1001 | if (sendline (server, "QUIT") || getok (server)) | |
1002 | { | |
1003 | ret = -1; | |
1004 | } | |
1005 | ||
1006 | close (server->file); | |
1007 | } | |
1008 | ||
1009 | if (server->buffer) | |
1010 | free (server->buffer); | |
1011 | free ((char *) server); | |
1012 | ||
1013 | return (ret); | |
1014 | } | |
1015 | ||
c2668a61 RS |
1016 | #ifdef WINDOWSNT |
1017 | static int have_winsock = 0; | |
1018 | #endif | |
1019 | ||
9c0f2dac RS |
1020 | /* |
1021 | * Function: socket_connection | |
1022 | * | |
1023 | * Purpose: Opens the network connection with the mail host, without | |
1024 | * doing any sort of I/O with it or anything. | |
1025 | * | |
1026 | * Arguments: | |
1027 | * host The host to which to connect. | |
1028 | * flags Option flags. | |
80b2cbf2 | 1029 | * |
9c0f2dac RS |
1030 | * Return value: A file descriptor indicating the connection, or -1 |
1031 | * indicating failure, in which case an error has been copied | |
1032 | * into pop_error. | |
1033 | */ | |
1034 | static int | |
1035 | socket_connection (host, flags) | |
1036 | char *host; | |
1037 | int flags; | |
1038 | { | |
33a2a872 JD |
1039 | #ifdef HAVE_GETADDRINFO |
1040 | struct addrinfo *res, *it; | |
1041 | struct addrinfo hints; | |
1042 | int ret; | |
1043 | #else /* !HAVE_GETADDRINFO */ | |
9c0f2dac | 1044 | struct hostent *hostent; |
33a2a872 | 1045 | #endif |
9c0f2dac RS |
1046 | struct servent *servent; |
1047 | struct sockaddr_in addr; | |
1048 | char found_port = 0; | |
1049 | char *service; | |
1050 | int sock; | |
ee15f312 | 1051 | char *realhost; |
9c0f2dac | 1052 | #ifdef KERBEROS |
a27738b6 | 1053 | #ifdef KERBEROS5 |
9c0f2dac | 1054 | krb5_error_code rem; |
a27738b6 RS |
1055 | krb5_context kcontext = 0; |
1056 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
1057 | krb5_ccache ccdef; |
1058 | krb5_principal client, server; | |
1059 | krb5_error *err_ret; | |
1060 | register char *cp; | |
1061 | #else | |
1062 | KTEXT ticket; | |
1063 | MSG_DAT msg_data; | |
1064 | CREDENTIALS cred; | |
1065 | Key_schedule schedule; | |
1066 | int rem; | |
a27738b6 | 1067 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1068 | #endif /* KERBEROS */ |
1069 | ||
1070 | int try_count = 0; | |
33a2a872 | 1071 | int connect_ok; |
9c0f2dac | 1072 | |
c2668a61 RS |
1073 | #ifdef WINDOWSNT |
1074 | { | |
1075 | WSADATA winsockData; | |
1076 | if (WSAStartup (0x101, &winsockData) == 0) | |
1077 | have_winsock = 1; | |
1078 | } | |
1079 | #endif | |
1080 | ||
9c0f2dac RS |
1081 | bzero ((char *) &addr, sizeof (addr)); |
1082 | addr.sin_family = AF_INET; | |
1083 | ||
81264b38 | 1084 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1085 | #ifdef KERBEROS |
1086 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1087 | #else | |
1088 | service = POP_SERVICE; | |
1089 | #endif | |
1090 | ||
1091 | #ifdef HESIOD | |
1092 | if (! (flags & POP_NO_HESIOD)) | |
1093 | { | |
1094 | servent = hes_getservbyname (service, "tcp"); | |
1095 | if (servent) | |
1096 | { | |
1097 | addr.sin_port = servent->s_port; | |
1098 | found_port = 1; | |
1099 | } | |
1100 | } | |
1101 | #endif | |
1102 | if (! found_port) | |
1103 | { | |
1104 | servent = getservbyname (service, "tcp"); | |
1105 | if (servent) | |
1106 | { | |
1107 | addr.sin_port = servent->s_port; | |
1108 | } | |
1109 | else | |
1110 | { | |
81264b38 | 1111 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1112 | #ifdef KERBEROS |
1113 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1114 | POP_PORT : KPOP_PORT); | |
1115 | #else | |
1116 | addr.sin_port = htons (POP_PORT); | |
1117 | #endif | |
1118 | } | |
1119 | } | |
1120 | ||
a27738b6 | 1121 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1122 | |
1123 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1124 | if (sock < 0) | |
1125 | { | |
a27738b6 | 1126 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1127 | strncat (pop_error, strerror (errno), |
a27738b6 | 1128 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac | 1129 | return (-1); |
80b2cbf2 | 1130 | |
9c0f2dac RS |
1131 | } |
1132 | ||
33a2a872 JD |
1133 | #ifdef HAVE_GETADDRINFO |
1134 | memset (&hints, 0, sizeof(hints)); | |
1135 | hints.ai_socktype = SOCK_STREAM; | |
7291159e | 1136 | hints.ai_flags = AI_CANONNAME; |
33a2a872 JD |
1137 | hints.ai_family = AF_INET; |
1138 | do | |
1139 | { | |
1140 | ret = getaddrinfo (host, service, &hints, &res); | |
1141 | try_count++; | |
1142 | if (ret != 0 && (ret != EAI_AGAIN || try_count == 5)) | |
1143 | { | |
1144 | strcpy (pop_error, "Could not determine POP server's address"); | |
1145 | return (-1); | |
1146 | } | |
1147 | } while (ret != 0); | |
1148 | ||
1149 | if (ret == 0) | |
1150 | { | |
1151 | it = res; | |
1152 | while (it) | |
1153 | { | |
1154 | if (it->ai_addrlen == sizeof (addr)) | |
1155 | { | |
1156 | struct sockaddr_in *in_a = (struct sockaddr_in *) it->ai_addr; | |
1157 | bcopy (&in_a->sin_addr, (char *) &addr.sin_addr, | |
1158 | sizeof (addr.sin_addr)); | |
1159 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1160 | break; | |
1161 | } | |
1162 | it = it->ai_next; | |
1163 | } | |
1164 | connect_ok = it != NULL; | |
ee15f312 JD |
1165 | if (connect_ok) |
1166 | { | |
1167 | realhost = alloca (strlen (it->ai_canonname) + 1); | |
1168 | strcpy (realhost, it->ai_canonname); | |
1169 | } | |
33a2a872 JD |
1170 | freeaddrinfo (res); |
1171 | } | |
1172 | #else /* !HAVE_GETADDRINFO */ | |
b72f3bcb EZ |
1173 | do |
1174 | { | |
1175 | hostent = gethostbyname (host); | |
1176 | try_count++; | |
1177 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1178 | { | |
1179 | strcpy (pop_error, "Could not determine POP server's address"); | |
1180 | return (-1); | |
1181 | } | |
1182 | } while (! hostent); | |
1183 | ||
9c0f2dac RS |
1184 | while (*hostent->h_addr_list) |
1185 | { | |
1186 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1187 | hostent->h_length); | |
1188 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1189 | break; | |
1190 | hostent->h_addr_list++; | |
1191 | } | |
33a2a872 | 1192 | connect_ok = *hostent->h_addr_list != NULL; |
ee15f312 JD |
1193 | if (! connect_ok) |
1194 | { | |
1195 | realhost = alloca (strlen (hostent->h_name) + 1); | |
1196 | strcpy (realhost, hostent->h_name); | |
1197 | } | |
1198 | ||
33a2a872 | 1199 | #endif /* !HAVE_GETADDRINFO */ |
9c0f2dac RS |
1200 | |
1201 | #define CONNECT_ERROR "Could not connect to POP server: " | |
80b2cbf2 | 1202 | |
33a2a872 | 1203 | if (! connect_ok) |
9c0f2dac | 1204 | { |
de5c39cf | 1205 | CLOSESOCKET (sock); |
9c0f2dac RS |
1206 | strcpy (pop_error, CONNECT_ERROR); |
1207 | strncat (pop_error, strerror (errno), | |
1208 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1209 | return (-1); | |
80b2cbf2 | 1210 | |
9c0f2dac RS |
1211 | } |
1212 | ||
1213 | #ifdef KERBEROS | |
33a2a872 | 1214 | |
9c0f2dac RS |
1215 | #define KRB_ERROR "Kerberos error connecting to POP server: " |
1216 | if (! (flags & POP_NO_KERBEROS)) | |
1217 | { | |
a27738b6 RS |
1218 | #ifdef KERBEROS5 |
1219 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1220 | { |
1221 | krb5error: | |
a27738b6 RS |
1222 | if (auth_context) |
1223 | krb5_auth_con_free (kcontext, auth_context); | |
1224 | if (kcontext) | |
1225 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1226 | strcpy (pop_error, KRB_ERROR); |
1227 | strncat (pop_error, error_message (rem), | |
1228 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1229 | CLOSESOCKET (sock); |
9c0f2dac RS |
1230 | return (-1); |
1231 | } | |
1232 | ||
a27738b6 RS |
1233 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1234 | goto krb5error; | |
80b2cbf2 | 1235 | |
a27738b6 RS |
1236 | if (rem = krb5_cc_default (kcontext, &ccdef)) |
1237 | goto krb5error; | |
1238 | ||
1239 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1240 | goto krb5error; | |
9c0f2dac | 1241 | |
33a2a872 | 1242 | for (cp = realhost; *cp; cp++) |
9c0f2dac RS |
1243 | { |
1244 | if (isupper (*cp)) | |
1245 | { | |
1246 | *cp = tolower (*cp); | |
1247 | } | |
1248 | } | |
1249 | ||
33a2a872 | 1250 | if (rem = krb5_sname_to_principal (kcontext, realhost, |
a27738b6 RS |
1251 | POP_SERVICE, FALSE, &server)) |
1252 | goto krb5error; | |
9c0f2dac | 1253 | |
a27738b6 RS |
1254 | rem = krb5_sendauth (kcontext, &auth_context, |
1255 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1256 | AP_OPTS_MUTUAL_REQUIRED, |
1257 | 0, /* no checksum */ | |
1258 | 0, /* no creds, use ccache instead */ | |
1259 | ccdef, | |
9c0f2dac | 1260 | &err_ret, |
a27738b6 | 1261 | 0, /* don't need subsession key */ |
9c0f2dac | 1262 | 0); /* don't need reply */ |
a27738b6 | 1263 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1264 | if (rem) |
1265 | { | |
1266 | if (err_ret && err_ret->text.length) | |
1267 | { | |
1268 | strcpy (pop_error, KRB_ERROR); | |
1269 | strncat (pop_error, error_message (rem), | |
1270 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1271 | strncat (pop_error, " [server says '", | |
1272 | ERROR_MAX - strlen (pop_error) - 1); | |
1273 | strncat (pop_error, err_ret->text.data, | |
1274 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1275 | err_ret->text.length)); | |
1276 | strncat (pop_error, "']", | |
1277 | ERROR_MAX - strlen (pop_error) - 1); | |
1278 | } | |
1279 | else | |
1280 | { | |
1281 | strcpy (pop_error, KRB_ERROR); | |
1282 | strncat (pop_error, error_message (rem), | |
1283 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1284 | } | |
1285 | if (err_ret) | |
a27738b6 RS |
1286 | krb5_free_error (kcontext, err_ret); |
1287 | krb5_auth_con_free (kcontext, auth_context); | |
1288 | krb5_free_context (kcontext); | |
9c0f2dac | 1289 | |
de5c39cf | 1290 | CLOSESOCKET (sock); |
9c0f2dac RS |
1291 | return (-1); |
1292 | } | |
80b2cbf2 | 1293 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1294 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1295 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, |
1296 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1297 | (unsigned long) 0, &msg_data, &cred, schedule, |
1298 | (struct sockaddr_in *) 0, | |
1299 | (struct sockaddr_in *) 0, | |
1300 | "KPOPV0.1"); | |
1301 | free ((char *) ticket); | |
1302 | if (rem != KSUCCESS) | |
1303 | { | |
1304 | strcpy (pop_error, KRB_ERROR); | |
1305 | strncat (pop_error, krb_err_txt[rem], | |
1306 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1307 | CLOSESOCKET (sock); |
9c0f2dac RS |
1308 | return (-1); |
1309 | } | |
a27738b6 | 1310 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1311 | } |
1312 | #endif /* KERBEROS */ | |
1313 | ||
1314 | return (sock); | |
1315 | } /* socket_connection */ | |
1316 | ||
1317 | /* | |
60b0a379 | 1318 | * Function: pop_getline |
9c0f2dac RS |
1319 | * |
1320 | * Purpose: Get a line of text from the connection and return a | |
1321 | * pointer to it. The carriage return and linefeed at the end of | |
1322 | * the line are stripped, but periods at the beginnings of lines | |
1323 | * are NOT dealt with in any special way. | |
1324 | * | |
1325 | * Arguments: | |
1326 | * server The server from which to get the line of text. | |
1327 | * | |
d89d0243 KH |
1328 | * Returns: The number of characters in the line, which is returned in |
1329 | * LINE, not including the final null. A return value of 0 | |
1330 | * indicates a blank line. A negative return value indicates an | |
1331 | * error (in which case the contents of LINE are undefined. In | |
1332 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1333 | * |
60b0a379 | 1334 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1335 | * |
1336 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1337 | * |
1338 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1339 | */ |
d89d0243 | 1340 | static int |
60b0a379 | 1341 | pop_getline (server, line) |
9c0f2dac | 1342 | popserver server; |
d89d0243 | 1343 | char **line; |
9c0f2dac RS |
1344 | { |
1345 | #define GETLINE_ERROR "Error reading from server: " | |
1346 | ||
1347 | int ret; | |
b6606ad8 RS |
1348 | int search_offset = 0; |
1349 | ||
9c0f2dac RS |
1350 | if (server->data) |
1351 | { | |
d89d0243 KH |
1352 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1353 | server->data); | |
9c0f2dac RS |
1354 | if (cp) |
1355 | { | |
1356 | int found; | |
1357 | int data_used; | |
1358 | ||
1359 | found = server->buffer_index; | |
1360 | data_used = (cp + 2) - server->buffer - found; | |
80b2cbf2 | 1361 | |
9c0f2dac RS |
1362 | *cp = '\0'; /* terminate the string to be returned */ |
1363 | server->data -= data_used; | |
1364 | server->buffer_index += data_used; | |
1365 | ||
1366 | if (pop_debug) | |
d89d0243 KH |
1367 | /* Embedded nulls will truncate this output prematurely, |
1368 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1369 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1370 | *line = server->buffer + found; |
1371 | return (data_used - 2); | |
9c0f2dac RS |
1372 | } |
1373 | else | |
1374 | { | |
1375 | bcopy (server->buffer + server->buffer_index, | |
1376 | server->buffer, server->data); | |
b6606ad8 RS |
1377 | /* Record the fact that we've searched the data already in |
1378 | the buffer for a CRLF, so that when we search below, we | |
1379 | don't have to search the same data twice. There's a "- | |
1380 | 1" here to account for the fact that the last character | |
1381 | of the data we have may be the CR of a CRLF pair, of | |
1382 | which we haven't read the second half yet, so we may have | |
1383 | to search it again when we read more data. */ | |
1384 | search_offset = server->data - 1; | |
9c0f2dac RS |
1385 | server->buffer_index = 0; |
1386 | } | |
1387 | } | |
1388 | else | |
1389 | { | |
1390 | server->buffer_index = 0; | |
1391 | } | |
1392 | ||
1393 | while (1) | |
1394 | { | |
bbcac09c RS |
1395 | /* There's a "- 1" here to leave room for the null that we put |
1396 | at the end of the read data below. We put the null there so | |
1397 | that find_crlf knows where to stop when we call it. */ | |
1398 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1399 | { |
bbcac09c RS |
1400 | server->buffer_size += GETLINE_INCR; |
1401 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1402 | if (! server->buffer) | |
9c0f2dac | 1403 | { |
bbcac09c RS |
1404 | strcpy (pop_error, "Out of memory in pop_getline"); |
1405 | pop_trash (server); | |
1406 | return (-1); | |
0ea95737 | 1407 | } |
0ea95737 | 1408 | } |
bbcac09c RS |
1409 | ret = RECV (server->file, server->buffer + server->data, |
1410 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1411 | if (ret < 0) |
1412 | { | |
1413 | strcpy (pop_error, GETLINE_ERROR); | |
1414 | strncat (pop_error, strerror (errno), | |
1415 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1416 | pop_trash (server); | |
d89d0243 | 1417 | return (-1); |
9c0f2dac RS |
1418 | } |
1419 | else if (ret == 0) | |
1420 | { | |
60b0a379 | 1421 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1422 | pop_trash (server); |
d89d0243 | 1423 | return (-1); |
9c0f2dac RS |
1424 | } |
1425 | else | |
1426 | { | |
7a481e50 | 1427 | char *cp; |
9c0f2dac | 1428 | server->data += ret; |
7a481e50 | 1429 | server->buffer[server->data] = '\0'; |
80b2cbf2 | 1430 | |
d89d0243 KH |
1431 | cp = find_crlf (server->buffer + search_offset, |
1432 | server->data - search_offset); | |
9c0f2dac RS |
1433 | if (cp) |
1434 | { | |
1435 | int data_used = (cp + 2) - server->buffer; | |
1436 | *cp = '\0'; | |
1437 | server->data -= data_used; | |
1438 | server->buffer_index = data_used; | |
1439 | ||
1440 | if (pop_debug) | |
1441 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1442 | *line = server->buffer; |
1443 | return (data_used - 2); | |
9c0f2dac | 1444 | } |
a8f44d07 RS |
1445 | /* As above, the "- 1" here is to account for the fact that |
1446 | we may have read a CR without its accompanying LF. */ | |
1447 | search_offset += ret - 1; | |
9c0f2dac RS |
1448 | } |
1449 | } | |
1450 | ||
1451 | /* NOTREACHED */ | |
1452 | } | |
1453 | ||
1454 | /* | |
1455 | * Function: sendline | |
1456 | * | |
1457 | * Purpose: Sends a line of text to the POP server. The line of text | |
1458 | * passed into this function should NOT have the carriage return | |
1459 | * and linefeed on the end of it. Periods at beginnings of lines | |
1460 | * will NOT be treated specially by this function. | |
1461 | * | |
1462 | * Arguments: | |
1463 | * server The server to which to send the text. | |
1464 | * line The line of text to send. | |
1465 | * | |
1466 | * Return value: Upon successful completion, a value of 0 will be | |
1467 | * returned. Otherwise, a non-zero value will be returned, and | |
1468 | * an error will be copied into pop_error. | |
1469 | * | |
1470 | * Side effects: Closes the connection on error. | |
1471 | */ | |
1472 | static int | |
1473 | sendline (server, line) | |
1474 | popserver server; | |
1475 | char *line; | |
1476 | { | |
1477 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1478 | int ret; | |
ec641d50 KR |
1479 | char *buf; |
1480 | ||
1481 | /* Combine the string and the CR-LF into one buffer. Otherwise, two | |
1482 | reasonable network stack optimizations, Nagle's algorithm and | |
1483 | delayed acks, combine to delay us a fraction of a second on every | |
1484 | message we send. (Movemail writes line without \r\n, client | |
1485 | kernel sends packet, server kernel delays the ack to see if it | |
1486 | can combine it with data, movemail writes \r\n, client kernel | |
1487 | waits because it has unacked data already in its outgoing queue, | |
1488 | client kernel eventually times out and sends.) | |
1489 | ||
1490 | This can be something like 0.2s per command, which can add up | |
1491 | over a few dozen messages, and is a big chunk of the time we | |
1492 | spend fetching mail from a server close by. */ | |
1493 | buf = alloca (strlen (line) + 3); | |
1494 | strcpy (buf, line); | |
1495 | strcat (buf, "\r\n"); | |
1496 | ret = fullwrite (server->file, buf, strlen (buf)); | |
9c0f2dac RS |
1497 | |
1498 | if (ret < 0) | |
1499 | { | |
1500 | pop_trash (server); | |
1501 | strcpy (pop_error, SENDLINE_ERROR); | |
1502 | strncat (pop_error, strerror (errno), | |
1503 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1504 | return (ret); | |
1505 | } | |
1506 | ||
1507 | if (pop_debug) | |
1508 | fprintf (stderr, ">>> %s\n", line); | |
1509 | ||
1510 | return (0); | |
1511 | } | |
1512 | ||
1513 | /* | |
1514 | * Procedure: fullwrite | |
1515 | * | |
1516 | * Purpose: Just like write, but keeps trying until the entire string | |
1517 | * has been written. | |
1518 | * | |
1519 | * Return value: Same as write. Pop_error is not set. | |
1520 | */ | |
1521 | static int | |
1522 | fullwrite (fd, buf, nbytes) | |
1523 | int fd; | |
1524 | char *buf; | |
1525 | int nbytes; | |
1526 | { | |
1527 | char *cp; | |
9d3f4cee | 1528 | int ret = 0; |
9c0f2dac RS |
1529 | |
1530 | cp = buf; | |
9d3f4cee | 1531 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1532 | { |
1533 | cp += ret; | |
1534 | nbytes -= ret; | |
1535 | } | |
1536 | ||
1537 | return (ret); | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * Procedure getok | |
1542 | * | |
1543 | * Purpose: Reads a line from the server. If the return indicator is | |
1544 | * positive, return with a zero exit status. If not, return with | |
1545 | * a negative exit status. | |
1546 | * | |
1547 | * Arguments: | |
1548 | * server The server to read from. | |
80b2cbf2 | 1549 | * |
9c0f2dac RS |
1550 | * Returns: 0 for success, else for failure and puts error in pop_error. |
1551 | * | |
8e6208c5 | 1552 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1553 | */ |
1554 | static int | |
1555 | getok (server) | |
1556 | popserver server; | |
1557 | { | |
1558 | char *fromline; | |
1559 | ||
60b0a379 | 1560 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1561 | { |
1562 | return (-1); | |
1563 | } | |
1564 | ||
1565 | if (! strncmp (fromline, "+OK", 3)) | |
1566 | return (0); | |
1567 | else if (! strncmp (fromline, "-ERR", 4)) | |
1568 | { | |
1569 | strncpy (pop_error, fromline, ERROR_MAX); | |
1570 | pop_error[ERROR_MAX-1] = '\0'; | |
1571 | return (-1); | |
1572 | } | |
1573 | else | |
1574 | { | |
1575 | strcpy (pop_error, | |
1576 | "Unexpected response from server; expecting +OK or -ERR"); | |
1577 | pop_trash (server); | |
1578 | return (-1); | |
1579 | } | |
80b2cbf2 | 1580 | } |
9c0f2dac RS |
1581 | |
1582 | #if 0 | |
1583 | /* | |
1584 | * Function: gettermination | |
1585 | * | |
1586 | * Purpose: Gets the next line and verifies that it is a termination | |
1587 | * line (nothing but a dot). | |
1588 | * | |
1589 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1590 | * | |
1591 | * Side effects: Closes the connection on error. | |
1592 | */ | |
1593 | static int | |
1594 | gettermination (server) | |
1595 | popserver server; | |
1596 | { | |
1597 | char *fromserver; | |
1598 | ||
60b0a379 | 1599 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1600 | return (-1); |
1601 | ||
1602 | if (strcmp (fromserver, ".")) | |
1603 | { | |
1604 | strcpy (pop_error, | |
1605 | "Unexpected response from server in gettermination"); | |
1606 | pop_trash (server); | |
1607 | return (-1); | |
1608 | } | |
1609 | ||
1610 | return (0); | |
1611 | } | |
1612 | #endif | |
1613 | ||
1614 | /* | |
1615 | * Function pop_close | |
1616 | * | |
1617 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1618 | * preserve any changes that were made and a "QUIT" command to | |
1619 | * try to get the server to quit, but ignoring any responses that | |
1620 | * are received. | |
1621 | * | |
8e6208c5 | 1622 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1623 | * Changes made to the maildrop since the session was started (or |
1624 | * since the last pop_reset) may be lost. | |
1625 | */ | |
80b2cbf2 | 1626 | void |
9c0f2dac RS |
1627 | pop_close (server) |
1628 | popserver server; | |
1629 | { | |
1630 | pop_trash (server); | |
1631 | free ((char *) server); | |
1632 | ||
1633 | return; | |
1634 | } | |
1635 | ||
1636 | /* | |
1637 | * Function: pop_trash | |
1638 | * | |
1639 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1640 | * memory associated with the server. It is legal to call | |
1641 | * pop_close or pop_quit after this function has been called. | |
1642 | */ | |
1643 | static void | |
1644 | pop_trash (server) | |
1645 | popserver server; | |
1646 | { | |
1647 | if (server->file >= 0) | |
1648 | { | |
c2668a61 RS |
1649 | /* avoid recursion; sendline can call pop_trash */ |
1650 | if (server->trash_started) | |
1651 | return; | |
1652 | server->trash_started = 1; | |
de5c39cf | 1653 | |
9c0f2dac RS |
1654 | sendline (server, "RSET"); |
1655 | sendline (server, "QUIT"); | |
1656 | ||
de5c39cf | 1657 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1658 | server->file = -1; |
1659 | if (server->buffer) | |
1660 | { | |
1661 | free (server->buffer); | |
1662 | server->buffer = 0; | |
1663 | } | |
1664 | } | |
c2668a61 RS |
1665 | |
1666 | #ifdef WINDOWSNT | |
1667 | if (have_winsock) | |
1668 | WSACleanup (); | |
1669 | #endif | |
9c0f2dac RS |
1670 | } |
1671 | ||
d89d0243 KH |
1672 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1673 | embedded nulls and has LEN characters in it not including the final | |
1674 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1675 | |
1676 | static char * | |
d89d0243 | 1677 | find_crlf (in_string, len) |
8148baf9 | 1678 | char *in_string; |
d89d0243 | 1679 | int len; |
9c0f2dac | 1680 | { |
d89d0243 | 1681 | while (len--) |
9c0f2dac | 1682 | { |
d89d0243 | 1683 | if (*in_string == '\r') |
8148baf9 RS |
1684 | { |
1685 | if (*++in_string == '\n') | |
1686 | return (in_string - 1); | |
1687 | } | |
1688 | else | |
1689 | in_string++; | |
9c0f2dac | 1690 | } |
d89d0243 | 1691 | return (0); |
9c0f2dac RS |
1692 | } |
1693 | ||
1694 | #endif /* MAIL_USE_POP */ | |
ab5796a9 MB |
1695 | |
1696 | /* arch-tag: ceb37041-b7ad-49a8-a63d-286618b8367d | |
1697 | (do not change this comment) */ |