Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
95df8112 | 2 | |
ab422c4d PE |
3 | Copyright (C) 1991, 1993, 1996-1997, 1999, 2001-2013 Free Software |
4 | Foundation, Inc. | |
294981c7 GM |
5 | |
6 | Author: Jonathan Kamens <jik@security.ov.com> | |
9c0f2dac RS |
7 | |
8 | This file is part of GNU Emacs. | |
9 | ||
294981c7 | 10 | GNU Emacs is free software: you can redistribute it and/or modify |
9c0f2dac | 11 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
12 | the Free Software Foundation, either version 3 of the License, or |
13 | (at your option) any later version. | |
9c0f2dac RS |
14 | |
15 | GNU Emacs is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
294981c7 GM |
21 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
22 | ||
9c0f2dac | 23 | |
2f8fe2f4 | 24 | #include <config.h> |
c9c3d8f6 | 25 | |
8148baf9 RS |
26 | #ifdef MAIL_USE_POP |
27 | ||
9c0f2dac | 28 | #include <sys/types.h> |
c2668a61 RS |
29 | #ifdef WINDOWSNT |
30 | #include "ntlib.h" | |
31 | #include <winsock.h> | |
32 | #undef SOCKET_ERROR | |
5e617bc2 JB |
33 | #define RECV(s,buf,len,flags) recv (s,buf,len,flags) |
34 | #define SEND(s,buf,len,flags) send (s,buf,len,flags) | |
35 | #define CLOSESOCKET(s) closesocket (s) | |
c2668a61 | 36 | #else |
9c0f2dac RS |
37 | #include <netinet/in.h> |
38 | #include <sys/socket.h> | |
5e617bc2 JB |
39 | #define RECV(s,buf,len,flags) read (s,buf,len) |
40 | #define SEND(s,buf,len,flags) write (s,buf,len) | |
41 | #define CLOSESOCKET(s) close (s) | |
c2668a61 | 42 | #endif |
9c0f2dac | 43 | #include <pop.h> |
625ad89f | 44 | |
9c0f2dac RS |
45 | #ifdef sun |
46 | #include <malloc.h> | |
8148baf9 | 47 | #endif /* sun */ |
625ad89f | 48 | |
9c0f2dac RS |
49 | #ifdef HESIOD |
50 | #include <hesiod.h> | |
51 | /* | |
52 | * It really shouldn't be necessary to put this declaration here, but | |
53 | * the version of hesiod.h that Athena has installed in release 7.2 | |
54 | * doesn't declare this function; I don't know if the 7.3 version of | |
55 | * hesiod.h does. | |
56 | */ | |
57 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
58 | #endif | |
625ad89f | 59 | |
9c0f2dac | 60 | #include <pwd.h> |
9c0f2dac RS |
61 | #include <netdb.h> |
62 | #include <errno.h> | |
63 | #include <stdio.h> | |
a27738b6 | 64 | #include <string.h> |
020d3015 | 65 | #include <unistd.h> |
625ad89f | 66 | |
9c0f2dac | 67 | #ifdef KERBEROS |
a27738b6 RS |
68 | # ifdef HAVE_KRB5_H |
69 | # include <krb5.h> | |
70 | # endif | |
a27738b6 RS |
71 | # ifdef HAVE_KRB_H |
72 | # include <krb.h> | |
73 | # else | |
74 | # ifdef HAVE_KERBEROSIV_KRB_H | |
75 | # include <kerberosIV/krb.h> | |
76 | # else | |
77 | # ifdef HAVE_KERBEROS_KRB_H | |
78 | # include <kerberos/krb.h> | |
79 | # endif | |
80 | # endif | |
81 | # endif | |
82 | # ifdef HAVE_COM_ERR_H | |
83 | # include <com_err.h> | |
84 | # endif | |
8148baf9 | 85 | #endif /* KERBEROS */ |
9c0f2dac | 86 | |
ba01e9d7 PE |
87 | #include <min-max.h> |
88 | ||
8148baf9 | 89 | #ifdef KERBEROS |
a27738b6 | 90 | #ifndef KERBEROS5 |
9c0f2dac | 91 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
92 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
93 | struct sockaddr_in *, struct sockaddr_in *, | |
94 | char * */); | |
9c0f2dac | 95 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 96 | #endif /* ! KERBEROS5 */ |
8148baf9 | 97 | #endif /* KERBEROS */ |
9c0f2dac | 98 | |
c2668a61 | 99 | #ifndef WINDOWSNT |
cf38a720 | 100 | #ifndef HAVE_H_ERRNO |
9c0f2dac RS |
101 | extern int h_errno; |
102 | #endif | |
c2668a61 | 103 | #endif |
9c0f2dac | 104 | |
f57e2426 J |
105 | static int socket_connection (char *, int); |
106 | static int pop_getline (popserver, char **); | |
988e88ab | 107 | static int sendline (popserver, const char *); |
f57e2426 J |
108 | static int fullwrite (int, char *, int); |
109 | static int getok (popserver); | |
9c0f2dac | 110 | #if 0 |
f57e2426 | 111 | static int gettermination (popserver); |
9c0f2dac | 112 | #endif |
f57e2426 J |
113 | static void pop_trash (popserver); |
114 | static char *find_crlf (char *, int); | |
7a481e50 | 115 | |
5bf244f1 | 116 | #define ERROR_MAX 160 /* a pretty arbitrary size, but needs |
a47bf648 DL |
117 | to be bigger than the original |
118 | value of 80 */ | |
9c0f2dac | 119 | #define POP_PORT 110 |
c2668a61 | 120 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ |
9c0f2dac | 121 | #ifdef KERBEROS |
0d7fdc0e | 122 | #define KPOP_PORT 1109 |
81264b38 | 123 | #define KPOP_SERVICE "kpop" /* never used: look for 20060515 to see why */ |
9c0f2dac | 124 | #endif |
9c0f2dac RS |
125 | |
126 | char pop_error[ERROR_MAX]; | |
127 | int pop_debug = 0; | |
128 | ||
9c0f2dac RS |
129 | /* |
130 | * Function: pop_open (char *host, char *username, char *password, | |
131 | * int flags) | |
132 | * | |
133 | * Purpose: Establishes a connection with a post-office server, and | |
134 | * completes the authorization portion of the session. | |
135 | * | |
136 | * Arguments: | |
137 | * host The server host with which the connection should be | |
138 | * established. Optional. If omitted, internal | |
139 | * heuristics will be used to determine the server host, | |
140 | * if possible. | |
141 | * username | |
142 | * The username of the mail-drop to access. Optional. | |
143 | * If omitted, internal heuristics will be used to | |
144 | * determine the username, if possible. | |
145 | * password | |
146 | * The password to use for authorization. If omitted, | |
147 | * internal heuristics will be used to determine the | |
148 | * password, if possible. | |
149 | * flags A bit mask containing flags controlling certain | |
150 | * functions of the routine. Valid flags are defined in | |
151 | * the file pop.h | |
152 | * | |
153 | * Return value: Upon successful establishment of a connection, a | |
154 | * non-null popserver will be returned. Otherwise, null will be | |
155 | * returned, and the string variable pop_error will contain an | |
156 | * explanation of the error. | |
157 | */ | |
158 | popserver | |
873fbd0b | 159 | pop_open (char *host, char *username, char *password, int flags) |
9c0f2dac RS |
160 | { |
161 | int sock; | |
162 | popserver server; | |
163 | ||
164 | /* Determine the user name */ | |
165 | if (! username) | |
166 | { | |
167 | username = getenv ("USER"); | |
168 | if (! (username && *username)) | |
169 | { | |
170 | username = getlogin (); | |
171 | if (! (username && *username)) | |
172 | { | |
173 | struct passwd *passwd; | |
174 | passwd = getpwuid (getuid ()); | |
175 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
176 | { | |
177 | username = passwd->pw_name; | |
178 | } | |
179 | else | |
180 | { | |
181 | strcpy (pop_error, "Could not determine username"); | |
182 | return (0); | |
183 | } | |
184 | } | |
185 | } | |
186 | } | |
187 | ||
188 | /* | |
189 | * Determine the mail host. | |
190 | */ | |
191 | ||
192 | if (! host) | |
193 | { | |
194 | host = getenv ("MAILHOST"); | |
195 | } | |
196 | ||
197 | #ifdef HESIOD | |
198 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
199 | { | |
200 | struct hes_postoffice *office; | |
201 | office = hes_getmailhost (username); | |
202 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
203 | && office->po_name && *office->po_name && office->po_host | |
204 | && *office->po_host) | |
205 | { | |
206 | host = office->po_host; | |
207 | username = office->po_name; | |
208 | } | |
209 | } | |
210 | #endif | |
211 | ||
212 | #ifdef MAILHOST | |
213 | if (! host) | |
214 | { | |
215 | host = MAILHOST; | |
216 | } | |
217 | #endif | |
218 | ||
219 | if (! host) | |
220 | { | |
221 | strcpy (pop_error, "Could not determine POP server"); | |
222 | return (0); | |
223 | } | |
224 | ||
225 | /* Determine the password */ | |
bbcac09c RS |
226 | #ifdef KERBEROS |
227 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
9c0f2dac | 228 | #else |
bbcac09c | 229 | #define DONT_NEED_PASSWORD 0 |
9c0f2dac | 230 | #endif |
177c0ea7 | 231 | |
9c0f2dac RS |
232 | if ((! password) && (! DONT_NEED_PASSWORD)) |
233 | { | |
234 | if (! (flags & POP_NO_GETPASS)) | |
235 | { | |
236 | password = getpass ("Enter POP password:"); | |
237 | } | |
238 | if (! password) | |
239 | { | |
240 | strcpy (pop_error, "Could not determine POP password"); | |
241 | return (0); | |
242 | } | |
243 | } | |
81264b38 | 244 | if (password) /* always true, detected 20060515 */ |
bbcac09c | 245 | flags |= POP_NO_KERBEROS; |
9c0f2dac | 246 | else |
81264b38 FP |
247 | password = username; /* dead code, detected 20060515 */ |
248 | /** "kpop" service is never used: look for 20060515 to see why **/ | |
9c0f2dac RS |
249 | |
250 | sock = socket_connection (host, flags); | |
251 | if (sock == -1) | |
252 | return (0); | |
253 | ||
254 | server = (popserver) malloc (sizeof (struct _popserver)); | |
255 | if (! server) | |
256 | { | |
257 | strcpy (pop_error, "Out of memory in pop_open"); | |
258 | return (0); | |
259 | } | |
260 | server->buffer = (char *) malloc (GETLINE_MIN); | |
261 | if (! server->buffer) | |
262 | { | |
263 | strcpy (pop_error, "Out of memory in pop_open"); | |
264 | free ((char *) server); | |
265 | return (0); | |
266 | } | |
80b2cbf2 | 267 | |
9c0f2dac RS |
268 | server->file = sock; |
269 | server->data = 0; | |
270 | server->buffer_index = 0; | |
271 | server->buffer_size = GETLINE_MIN; | |
272 | server->in_multi = 0; | |
c2668a61 | 273 | server->trash_started = 0; |
9c0f2dac RS |
274 | |
275 | if (getok (server)) | |
276 | return (0); | |
277 | ||
278 | /* | |
279 | * I really shouldn't use the pop_error variable like this, but.... | |
280 | */ | |
281 | if (strlen (username) > ERROR_MAX - 6) | |
282 | { | |
283 | pop_close (server); | |
284 | strcpy (pop_error, | |
285 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
286 | return (0); | |
287 | } | |
288 | sprintf (pop_error, "USER %s", username); | |
289 | ||
290 | if (sendline (server, pop_error) || getok (server)) | |
291 | { | |
292 | return (0); | |
293 | } | |
294 | ||
295 | if (strlen (password) > ERROR_MAX - 6) | |
296 | { | |
297 | pop_close (server); | |
298 | strcpy (pop_error, | |
299 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
300 | return (0); | |
301 | } | |
302 | sprintf (pop_error, "PASS %s", password); | |
303 | ||
304 | if (sendline (server, pop_error) || getok (server)) | |
305 | { | |
306 | return (0); | |
307 | } | |
308 | ||
309 | return (server); | |
310 | } | |
311 | ||
312 | /* | |
313 | * Function: pop_stat | |
314 | * | |
315 | * Purpose: Issue the STAT command to the server and return (in the | |
316 | * value parameters) the number of messages in the maildrop and | |
317 | * the total size of the maildrop. | |
318 | * | |
319 | * Return value: 0 on success, or non-zero with an error in pop_error | |
320 | * in failure. | |
321 | * | |
322 | * Side effects: On failure, may make further operations on the | |
323 | * connection impossible. | |
324 | */ | |
325 | int | |
873fbd0b | 326 | pop_stat (popserver server, int *count, int *size) |
9c0f2dac RS |
327 | { |
328 | char *fromserver; | |
0b074993 | 329 | char *end_ptr; |
9c0f2dac RS |
330 | |
331 | if (server->in_multi) | |
332 | { | |
333 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
334 | return (-1); | |
335 | } | |
80b2cbf2 | 336 | |
60b0a379 | 337 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
338 | return (-1); |
339 | ||
340 | if (strncmp (fromserver, "+OK ", 4)) | |
341 | { | |
342 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
e99a530f | 343 | snprintf (pop_error, ERROR_MAX, "%s", fromserver); |
9c0f2dac RS |
344 | else |
345 | { | |
346 | strcpy (pop_error, | |
347 | "Unexpected response from POP server in pop_stat"); | |
348 | pop_trash (server); | |
349 | } | |
350 | return (-1); | |
351 | } | |
352 | ||
0b074993 CY |
353 | errno = 0; |
354 | *count = strtol (&fromserver[4], &end_ptr, 10); | |
355 | /* Check validity of string-to-integer conversion. */ | |
59a431d6 | 356 | if (fromserver + 4 == end_ptr || *end_ptr != ' ' || errno) |
0b074993 CY |
357 | { |
358 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
359 | pop_trash (server); | |
360 | return (-1); | |
361 | } | |
80b2cbf2 | 362 | |
59a431d6 | 363 | fromserver = end_ptr; |
9c0f2dac | 364 | |
0b074993 CY |
365 | errno = 0; |
366 | *size = strtol (fromserver + 1, &end_ptr, 10); | |
59a431d6 | 367 | if (fromserver + 1 == end_ptr || errno) |
0b074993 CY |
368 | { |
369 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
370 | pop_trash (server); | |
371 | return (-1); | |
372 | } | |
9c0f2dac RS |
373 | |
374 | return (0); | |
375 | } | |
376 | ||
377 | /* | |
378 | * Function: pop_list | |
379 | * | |
380 | * Purpose: Performs the POP "list" command and returns (in value | |
381 | * parameters) two malloc'd zero-terminated arrays -- one of | |
382 | * message IDs, and a parallel one of sizes. | |
383 | * | |
384 | * Arguments: | |
385 | * server The pop connection to talk to. | |
386 | * message The number of the one message about which to get | |
387 | * information, or 0 to get information about all | |
388 | * messages. | |
389 | * | |
390 | * Return value: 0 on success, non-zero with error in pop_error on | |
391 | * failure. | |
392 | * | |
393 | * Side effects: On failure, may make further operations on the | |
394 | * connection impossible. | |
395 | */ | |
396 | int | |
873fbd0b | 397 | pop_list (popserver server, int message, int **IDs, int **sizes) |
9c0f2dac RS |
398 | { |
399 | int how_many, i; | |
400 | char *fromserver; | |
401 | ||
402 | if (server->in_multi) | |
403 | { | |
404 | strcpy (pop_error, "In multi-line query in pop_list"); | |
405 | return (-1); | |
406 | } | |
407 | ||
408 | if (message) | |
409 | how_many = 1; | |
410 | else | |
411 | { | |
412 | int count, size; | |
413 | if (pop_stat (server, &count, &size)) | |
414 | return (-1); | |
415 | how_many = count; | |
416 | } | |
417 | ||
418 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
419 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
420 | if (! (*IDs && *sizes)) | |
421 | { | |
422 | strcpy (pop_error, "Out of memory in pop_list"); | |
423 | return (-1); | |
424 | } | |
425 | ||
426 | if (message) | |
427 | { | |
428 | sprintf (pop_error, "LIST %d", message); | |
429 | if (sendline (server, pop_error)) | |
430 | { | |
431 | free ((char *) *IDs); | |
432 | free ((char *) *sizes); | |
433 | return (-1); | |
434 | } | |
60b0a379 | 435 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
436 | { |
437 | free ((char *) *IDs); | |
438 | free ((char *) *sizes); | |
439 | return (-1); | |
440 | } | |
441 | if (strncmp (fromserver, "+OK ", 4)) | |
442 | { | |
443 | if (! strncmp (fromserver, "-ERR", 4)) | |
e99a530f | 444 | snprintf (pop_error, ERROR_MAX, "%s", fromserver); |
9c0f2dac RS |
445 | else |
446 | { | |
447 | strcpy (pop_error, | |
448 | "Unexpected response from server in pop_list"); | |
449 | pop_trash (server); | |
450 | } | |
451 | free ((char *) *IDs); | |
452 | free ((char *) *sizes); | |
453 | return (-1); | |
454 | } | |
455 | (*IDs)[0] = atoi (&fromserver[4]); | |
8966b757 | 456 | fromserver = strchr (&fromserver[4], ' '); |
9c0f2dac RS |
457 | if (! fromserver) |
458 | { | |
459 | strcpy (pop_error, | |
460 | "Badly formatted response from server in pop_list"); | |
461 | pop_trash (server); | |
462 | free ((char *) *IDs); | |
463 | free ((char *) *sizes); | |
464 | return (-1); | |
465 | } | |
466 | (*sizes)[0] = atoi (fromserver); | |
467 | (*IDs)[1] = (*sizes)[1] = 0; | |
468 | return (0); | |
469 | } | |
470 | else | |
471 | { | |
472 | if (pop_multi_first (server, "LIST", &fromserver)) | |
473 | { | |
474 | free ((char *) *IDs); | |
475 | free ((char *) *sizes); | |
476 | return (-1); | |
477 | } | |
478 | for (i = 0; i < how_many; i++) | |
479 | { | |
d89d0243 | 480 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
481 | { |
482 | free ((char *) *IDs); | |
483 | free ((char *) *sizes); | |
484 | return (-1); | |
485 | } | |
486 | (*IDs)[i] = atoi (fromserver); | |
8966b757 | 487 | fromserver = strchr (fromserver, ' '); |
9c0f2dac RS |
488 | if (! fromserver) |
489 | { | |
490 | strcpy (pop_error, | |
491 | "Badly formatted response from server in pop_list"); | |
492 | free ((char *) *IDs); | |
493 | free ((char *) *sizes); | |
494 | pop_trash (server); | |
495 | return (-1); | |
496 | } | |
497 | (*sizes)[i] = atoi (fromserver); | |
498 | } | |
d89d0243 | 499 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
500 | { |
501 | free ((char *) *IDs); | |
502 | free ((char *) *sizes); | |
503 | return (-1); | |
504 | } | |
505 | else if (fromserver) | |
506 | { | |
507 | strcpy (pop_error, | |
508 | "Too many response lines from server in pop_list"); | |
509 | free ((char *) *IDs); | |
510 | free ((char *) *sizes); | |
511 | return (-1); | |
512 | } | |
513 | (*IDs)[i] = (*sizes)[i] = 0; | |
514 | return (0); | |
515 | } | |
516 | } | |
517 | ||
518 | /* | |
519 | * Function: pop_retrieve | |
520 | * | |
521 | * Purpose: Retrieve a specified message from the maildrop. | |
522 | * | |
523 | * Arguments: | |
524 | * server The server to retrieve from. | |
525 | * message The message number to retrieve. | |
526 | * markfrom | |
527 | * If true, then mark the string "From " at the beginning | |
528 | * of lines with '>'. | |
d89d0243 KH |
529 | * msg_buf Output parameter to which a buffer containing the |
530 | * message is assigned. | |
177c0ea7 | 531 | * |
d89d0243 KH |
532 | * Return value: The number of bytes in msg_buf, which may contain |
533 | * embedded nulls, not including its final null, or -1 on error | |
534 | * with pop_error set. | |
9c0f2dac RS |
535 | * |
536 | * Side effects: May kill connection on error. | |
537 | */ | |
d89d0243 | 538 | int |
873fbd0b | 539 | pop_retrieve (popserver server, int message, int markfrom, char **msg_buf) |
9c0f2dac RS |
540 | { |
541 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
542 | char *ptr, *fromserver; | |
543 | int ret; | |
544 | ||
545 | if (server->in_multi) | |
546 | { | |
547 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 548 | return (-1); |
9c0f2dac RS |
549 | } |
550 | ||
551 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 552 | return (-1); |
9c0f2dac RS |
553 | |
554 | if (pop_retrieve_first (server, message, &fromserver)) | |
555 | { | |
d89d0243 | 556 | return (-1); |
9c0f2dac RS |
557 | } |
558 | ||
559 | /* | |
560 | * The "5" below is an arbitrary constant -- I assume that if | |
561 | * there are "From" lines in the text to be marked, there | |
562 | * probably won't be more than 5 of them. If there are, I | |
563 | * allocate more space for them below. | |
564 | */ | |
565 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 566 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
567 | free ((char *) IDs); |
568 | free ((char *) sizes); | |
569 | ||
570 | if (! ptr) | |
571 | { | |
572 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
573 | pop_retrieve_flush (server); | |
d89d0243 | 574 | return (-1); |
9c0f2dac RS |
575 | } |
576 | ||
d89d0243 | 577 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 578 | { |
9c0f2dac RS |
579 | if (! fromserver) |
580 | { | |
581 | ptr[cp] = '\0'; | |
d89d0243 KH |
582 | *msg_buf = ptr; |
583 | return (cp); | |
9c0f2dac RS |
584 | } |
585 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
586 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
587 | fromserver[4] == ' ') | |
588 | { | |
589 | if (++fromcount == 5) | |
590 | { | |
591 | bufsize += 5; | |
7d665945 | 592 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
593 | if (! ptr) |
594 | { | |
595 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
596 | pop_retrieve_flush (server); | |
d89d0243 | 597 | return (-1); |
9c0f2dac RS |
598 | } |
599 | fromcount = 0; | |
600 | } | |
601 | ptr[cp++] = '>'; | |
602 | } | |
72af86bd | 603 | memcpy (&ptr[cp], fromserver, ret); |
d89d0243 | 604 | cp += ret; |
9c0f2dac RS |
605 | ptr[cp++] = '\n'; |
606 | } | |
607 | ||
d89d0243 KH |
608 | free (ptr); |
609 | return (-1); | |
177c0ea7 | 610 | } |
9c0f2dac RS |
611 | |
612 | int | |
873fbd0b | 613 | pop_retrieve_first (popserver server, int message, char **response) |
9c0f2dac RS |
614 | { |
615 | sprintf (pop_error, "RETR %d", message); | |
616 | return (pop_multi_first (server, pop_error, response)); | |
617 | } | |
618 | ||
d89d0243 KH |
619 | /* |
620 | Returns a negative number on error, 0 to indicate that the data has | |
621 | all been read (i.e., the server has returned a "." termination | |
622 | line), or a positive number indicating the number of bytes in the | |
623 | returned buffer (which is null-terminated and may contain embedded | |
624 | nulls, but the returned bytecount doesn't include the final null). | |
625 | */ | |
626 | ||
9c0f2dac | 627 | int |
873fbd0b | 628 | pop_retrieve_next (popserver server, char **line) |
9c0f2dac RS |
629 | { |
630 | return (pop_multi_next (server, line)); | |
631 | } | |
632 | ||
633 | int | |
873fbd0b | 634 | pop_retrieve_flush (popserver server) |
9c0f2dac RS |
635 | { |
636 | return (pop_multi_flush (server)); | |
637 | } | |
638 | ||
639 | int | |
873fbd0b | 640 | pop_top_first (popserver server, int message, int lines, char **response) |
9c0f2dac RS |
641 | { |
642 | sprintf (pop_error, "TOP %d %d", message, lines); | |
643 | return (pop_multi_first (server, pop_error, response)); | |
644 | } | |
645 | ||
d89d0243 KH |
646 | /* |
647 | Returns a negative number on error, 0 to indicate that the data has | |
648 | all been read (i.e., the server has returned a "." termination | |
649 | line), or a positive number indicating the number of bytes in the | |
650 | returned buffer (which is null-terminated and may contain embedded | |
651 | nulls, but the returned bytecount doesn't include the final null). | |
652 | */ | |
653 | ||
9c0f2dac | 654 | int |
873fbd0b | 655 | pop_top_next (popserver server, char **line) |
9c0f2dac RS |
656 | { |
657 | return (pop_multi_next (server, line)); | |
658 | } | |
659 | ||
660 | int | |
873fbd0b | 661 | pop_top_flush (popserver server) |
9c0f2dac RS |
662 | { |
663 | return (pop_multi_flush (server)); | |
664 | } | |
665 | ||
666 | int | |
988e88ab | 667 | pop_multi_first (popserver server, const char *command, char **response) |
9c0f2dac RS |
668 | { |
669 | if (server->in_multi) | |
670 | { | |
671 | strcpy (pop_error, | |
672 | "Already in multi-line query in pop_multi_first"); | |
673 | return (-1); | |
674 | } | |
675 | ||
60b0a379 | 676 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
677 | { |
678 | return (-1); | |
679 | } | |
680 | ||
681 | if (0 == strncmp (*response, "-ERR", 4)) | |
682 | { | |
e99a530f | 683 | snprintf (pop_error, ERROR_MAX, "%s", *response); |
9c0f2dac RS |
684 | return (-1); |
685 | } | |
686 | else if (0 == strncmp (*response, "+OK", 3)) | |
687 | { | |
688 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
689 | server->in_multi = 1; | |
690 | return (0); | |
691 | } | |
692 | else | |
693 | { | |
694 | strcpy (pop_error, | |
695 | "Unexpected response from server in pop_multi_first"); | |
696 | return (-1); | |
697 | } | |
698 | } | |
699 | ||
d89d0243 KH |
700 | /* |
701 | Read the next line of data from SERVER and place a pointer to it | |
702 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
703 | (i.e., the server has returned a line containing only "."), or a | |
704 | positive number indicating the number of bytes in the LINE buffer | |
705 | (not including the final null). The data in that buffer may contain | |
706 | embedded nulls, but does not contain the final CRLF. When returning | |
707 | 0, LINE is set to null. */ | |
708 | ||
9c0f2dac | 709 | int |
873fbd0b | 710 | pop_multi_next (popserver server, char **line) |
9c0f2dac RS |
711 | { |
712 | char *fromserver; | |
d89d0243 | 713 | int ret; |
9c0f2dac RS |
714 | |
715 | if (! server->in_multi) | |
716 | { | |
717 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
718 | return (-1); | |
719 | } | |
720 | ||
60b0a379 | 721 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
722 | { |
723 | return (-1); | |
724 | } | |
725 | ||
726 | if (fromserver[0] == '.') | |
727 | { | |
728 | if (! fromserver[1]) | |
729 | { | |
730 | *line = 0; | |
731 | server->in_multi = 0; | |
732 | return (0); | |
733 | } | |
734 | else | |
735 | { | |
736 | *line = fromserver + 1; | |
d89d0243 | 737 | return (ret - 1); |
9c0f2dac RS |
738 | } |
739 | } | |
740 | else | |
741 | { | |
742 | *line = fromserver; | |
d89d0243 | 743 | return (ret); |
9c0f2dac RS |
744 | } |
745 | } | |
746 | ||
747 | int | |
873fbd0b | 748 | pop_multi_flush (popserver server) |
9c0f2dac RS |
749 | { |
750 | char *line; | |
d89d0243 | 751 | int ret; |
9c0f2dac RS |
752 | |
753 | if (! server->in_multi) | |
754 | { | |
755 | return (0); | |
756 | } | |
757 | ||
d89d0243 | 758 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 759 | { |
d89d0243 KH |
760 | if (ret < 0) |
761 | return (-1); | |
9c0f2dac RS |
762 | } |
763 | ||
d89d0243 | 764 | return (0); |
9c0f2dac RS |
765 | } |
766 | ||
767 | /* Function: pop_delete | |
768 | * | |
769 | * Purpose: Delete a specified message. | |
770 | * | |
771 | * Arguments: | |
772 | * server Server from which to delete the message. | |
773 | * message Message to delete. | |
774 | * | |
775 | * Return value: 0 on success, non-zero with error in pop_error | |
776 | * otherwise. | |
777 | */ | |
778 | int | |
873fbd0b | 779 | pop_delete (popserver server, int message) |
9c0f2dac RS |
780 | { |
781 | if (server->in_multi) | |
782 | { | |
783 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
784 | return (-1); | |
785 | } | |
786 | ||
787 | sprintf (pop_error, "DELE %d", message); | |
788 | ||
789 | if (sendline (server, pop_error) || getok (server)) | |
790 | return (-1); | |
791 | ||
792 | return (0); | |
793 | } | |
794 | ||
795 | /* | |
796 | * Function: pop_noop | |
797 | * | |
798 | * Purpose: Send a noop command to the server. | |
799 | * | |
800 | * Argument: | |
801 | * server The server to send to. | |
802 | * | |
803 | * Return value: 0 on success, non-zero with error in pop_error | |
804 | * otherwise. | |
805 | * | |
806 | * Side effects: Closes connection on error. | |
807 | */ | |
808 | int | |
873fbd0b | 809 | pop_noop (popserver server) |
9c0f2dac RS |
810 | { |
811 | if (server->in_multi) | |
812 | { | |
813 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
814 | return (-1); | |
815 | } | |
816 | ||
817 | if (sendline (server, "NOOP") || getok (server)) | |
818 | return (-1); | |
819 | ||
820 | return (0); | |
821 | } | |
822 | ||
823 | /* | |
824 | * Function: pop_last | |
825 | * | |
826 | * Purpose: Find out the highest seen message from the server. | |
827 | * | |
828 | * Arguments: | |
829 | * server The server. | |
830 | * | |
831 | * Return value: If successful, the highest seen message, which is | |
832 | * greater than or equal to 0. Otherwise, a negative number with | |
833 | * the error explained in pop_error. | |
834 | * | |
835 | * Side effects: Closes the connection on error. | |
836 | */ | |
837 | int | |
873fbd0b | 838 | pop_last (popserver server) |
9c0f2dac RS |
839 | { |
840 | char *fromserver; | |
80b2cbf2 | 841 | |
9c0f2dac RS |
842 | if (server->in_multi) |
843 | { | |
844 | strcpy (pop_error, "In multi-line query in pop_last"); | |
845 | return (-1); | |
846 | } | |
847 | ||
848 | if (sendline (server, "LAST")) | |
849 | return (-1); | |
850 | ||
60b0a379 | 851 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
852 | return (-1); |
853 | ||
854 | if (! strncmp (fromserver, "-ERR", 4)) | |
855 | { | |
e99a530f | 856 | snprintf (pop_error, ERROR_MAX, "%s", fromserver); |
9c0f2dac RS |
857 | return (-1); |
858 | } | |
859 | else if (strncmp (fromserver, "+OK ", 4)) | |
860 | { | |
861 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
862 | pop_trash (server); | |
863 | return (-1); | |
864 | } | |
865 | else | |
866 | { | |
0b074993 CY |
867 | char *end_ptr; |
868 | int count; | |
869 | errno = 0; | |
870 | count = strtol (&fromserver[4], &end_ptr, 10); | |
59a431d6 | 871 | if (fromserver + 4 == end_ptr || errno) |
0b074993 CY |
872 | { |
873 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
874 | pop_trash (server); | |
875 | return (-1); | |
876 | } | |
877 | return count; | |
9c0f2dac RS |
878 | } |
879 | } | |
880 | ||
881 | /* | |
882 | * Function: pop_reset | |
883 | * | |
884 | * Purpose: Reset the server to its initial connect state | |
885 | * | |
886 | * Arguments: | |
887 | * server The server. | |
888 | * | |
889 | * Return value: 0 for success, non-0 with error in pop_error | |
890 | * otherwise. | |
891 | * | |
892 | * Side effects: Closes the connection on error. | |
893 | */ | |
894 | int | |
873fbd0b | 895 | pop_reset (popserver server) |
9c0f2dac RS |
896 | { |
897 | if (pop_retrieve_flush (server)) | |
898 | { | |
899 | return (-1); | |
900 | } | |
901 | ||
902 | if (sendline (server, "RSET") || getok (server)) | |
903 | return (-1); | |
904 | ||
905 | return (0); | |
906 | } | |
907 | ||
908 | /* | |
909 | * Function: pop_quit | |
910 | * | |
911 | * Purpose: Quit the connection to the server, | |
912 | * | |
913 | * Arguments: | |
914 | * server The server to quit. | |
915 | * | |
916 | * Return value: 0 for success, non-zero otherwise with error in | |
917 | * pop_error. | |
918 | * | |
8e6208c5 | 919 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
920 | * function is called, even if an error occurs. |
921 | */ | |
922 | int | |
873fbd0b | 923 | pop_quit (popserver server) |
9c0f2dac RS |
924 | { |
925 | int ret = 0; | |
926 | ||
927 | if (server->file >= 0) | |
928 | { | |
929 | if (pop_retrieve_flush (server)) | |
930 | { | |
931 | ret = -1; | |
932 | } | |
933 | ||
934 | if (sendline (server, "QUIT") || getok (server)) | |
935 | { | |
936 | ret = -1; | |
937 | } | |
938 | ||
939 | close (server->file); | |
940 | } | |
941 | ||
c2cd06e6 | 942 | free (server->buffer); |
9c0f2dac RS |
943 | free ((char *) server); |
944 | ||
945 | return (ret); | |
946 | } | |
947 | ||
c2668a61 RS |
948 | #ifdef WINDOWSNT |
949 | static int have_winsock = 0; | |
950 | #endif | |
951 | ||
9c0f2dac RS |
952 | /* |
953 | * Function: socket_connection | |
954 | * | |
955 | * Purpose: Opens the network connection with the mail host, without | |
956 | * doing any sort of I/O with it or anything. | |
957 | * | |
958 | * Arguments: | |
959 | * host The host to which to connect. | |
960 | * flags Option flags. | |
80b2cbf2 | 961 | * |
9c0f2dac RS |
962 | * Return value: A file descriptor indicating the connection, or -1 |
963 | * indicating failure, in which case an error has been copied | |
964 | * into pop_error. | |
965 | */ | |
966 | static int | |
873fbd0b | 967 | socket_connection (char *host, int flags) |
9c0f2dac | 968 | { |
33a2a872 JD |
969 | #ifdef HAVE_GETADDRINFO |
970 | struct addrinfo *res, *it; | |
971 | struct addrinfo hints; | |
972 | int ret; | |
973 | #else /* !HAVE_GETADDRINFO */ | |
9c0f2dac | 974 | struct hostent *hostent; |
33a2a872 | 975 | #endif |
9c0f2dac RS |
976 | struct servent *servent; |
977 | struct sockaddr_in addr; | |
978 | char found_port = 0; | |
988e88ab | 979 | const char *service; |
9c0f2dac | 980 | int sock; |
ee15f312 | 981 | char *realhost; |
9c0f2dac | 982 | #ifdef KERBEROS |
a27738b6 | 983 | #ifdef KERBEROS5 |
9c0f2dac | 984 | krb5_error_code rem; |
a27738b6 RS |
985 | krb5_context kcontext = 0; |
986 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
987 | krb5_ccache ccdef; |
988 | krb5_principal client, server; | |
989 | krb5_error *err_ret; | |
990 | register char *cp; | |
991 | #else | |
992 | KTEXT ticket; | |
993 | MSG_DAT msg_data; | |
994 | CREDENTIALS cred; | |
995 | Key_schedule schedule; | |
996 | int rem; | |
a27738b6 | 997 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
998 | #endif /* KERBEROS */ |
999 | ||
1000 | int try_count = 0; | |
33a2a872 | 1001 | int connect_ok; |
9c0f2dac | 1002 | |
c2668a61 RS |
1003 | #ifdef WINDOWSNT |
1004 | { | |
1005 | WSADATA winsockData; | |
1006 | if (WSAStartup (0x101, &winsockData) == 0) | |
1007 | have_winsock = 1; | |
1008 | } | |
1009 | #endif | |
1010 | ||
72af86bd | 1011 | memset (&addr, 0, sizeof (addr)); |
9c0f2dac RS |
1012 | addr.sin_family = AF_INET; |
1013 | ||
81264b38 | 1014 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1015 | #ifdef KERBEROS |
1016 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1017 | #else | |
1018 | service = POP_SERVICE; | |
1019 | #endif | |
1020 | ||
1021 | #ifdef HESIOD | |
1022 | if (! (flags & POP_NO_HESIOD)) | |
1023 | { | |
1024 | servent = hes_getservbyname (service, "tcp"); | |
1025 | if (servent) | |
1026 | { | |
1027 | addr.sin_port = servent->s_port; | |
1028 | found_port = 1; | |
1029 | } | |
1030 | } | |
1031 | #endif | |
1032 | if (! found_port) | |
1033 | { | |
1034 | servent = getservbyname (service, "tcp"); | |
1035 | if (servent) | |
1036 | { | |
1037 | addr.sin_port = servent->s_port; | |
1038 | } | |
1039 | else | |
1040 | { | |
81264b38 | 1041 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1042 | #ifdef KERBEROS |
1043 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1044 | POP_PORT : KPOP_PORT); | |
1045 | #else | |
1046 | addr.sin_port = htons (POP_PORT); | |
1047 | #endif | |
1048 | } | |
1049 | } | |
1050 | ||
a27738b6 | 1051 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1052 | |
1053 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1054 | if (sock < 0) | |
1055 | { | |
e99a530f PE |
1056 | snprintf (pop_error, ERROR_MAX, "%s%s", |
1057 | POP_SOCKET_ERROR, strerror (errno)); | |
9c0f2dac | 1058 | return (-1); |
80b2cbf2 | 1059 | |
9c0f2dac RS |
1060 | } |
1061 | ||
33a2a872 | 1062 | #ifdef HAVE_GETADDRINFO |
5e617bc2 | 1063 | memset (&hints, 0, sizeof (hints)); |
33a2a872 | 1064 | hints.ai_socktype = SOCK_STREAM; |
7291159e | 1065 | hints.ai_flags = AI_CANONNAME; |
33a2a872 JD |
1066 | hints.ai_family = AF_INET; |
1067 | do | |
1068 | { | |
1069 | ret = getaddrinfo (host, service, &hints, &res); | |
1070 | try_count++; | |
1071 | if (ret != 0 && (ret != EAI_AGAIN || try_count == 5)) | |
1072 | { | |
1073 | strcpy (pop_error, "Could not determine POP server's address"); | |
1074 | return (-1); | |
1075 | } | |
1076 | } while (ret != 0); | |
1077 | ||
1078 | if (ret == 0) | |
1079 | { | |
1080 | it = res; | |
1081 | while (it) | |
1082 | { | |
1083 | if (it->ai_addrlen == sizeof (addr)) | |
1084 | { | |
1085 | struct sockaddr_in *in_a = (struct sockaddr_in *) it->ai_addr; | |
ae1d87e2 | 1086 | addr.sin_addr = in_a->sin_addr; |
33a2a872 JD |
1087 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1088 | break; | |
1089 | } | |
1090 | it = it->ai_next; | |
1091 | } | |
1092 | connect_ok = it != NULL; | |
ee15f312 JD |
1093 | if (connect_ok) |
1094 | { | |
1095 | realhost = alloca (strlen (it->ai_canonname) + 1); | |
1096 | strcpy (realhost, it->ai_canonname); | |
1097 | } | |
33a2a872 JD |
1098 | freeaddrinfo (res); |
1099 | } | |
1100 | #else /* !HAVE_GETADDRINFO */ | |
b72f3bcb EZ |
1101 | do |
1102 | { | |
1103 | hostent = gethostbyname (host); | |
1104 | try_count++; | |
1105 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1106 | { | |
1107 | strcpy (pop_error, "Could not determine POP server's address"); | |
1108 | return (-1); | |
1109 | } | |
1110 | } while (! hostent); | |
1111 | ||
9c0f2dac RS |
1112 | while (*hostent->h_addr_list) |
1113 | { | |
72af86bd | 1114 | memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length); |
9c0f2dac RS |
1115 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1116 | break; | |
1117 | hostent->h_addr_list++; | |
1118 | } | |
33a2a872 | 1119 | connect_ok = *hostent->h_addr_list != NULL; |
ee15f312 JD |
1120 | if (! connect_ok) |
1121 | { | |
1122 | realhost = alloca (strlen (hostent->h_name) + 1); | |
1123 | strcpy (realhost, hostent->h_name); | |
1124 | } | |
1125 | ||
33a2a872 | 1126 | #endif /* !HAVE_GETADDRINFO */ |
9c0f2dac RS |
1127 | |
1128 | #define CONNECT_ERROR "Could not connect to POP server: " | |
80b2cbf2 | 1129 | |
33a2a872 | 1130 | if (! connect_ok) |
9c0f2dac | 1131 | { |
de5c39cf | 1132 | CLOSESOCKET (sock); |
e99a530f | 1133 | snprintf (pop_error, ERROR_MAX, "%s%s", CONNECT_ERROR, strerror (errno)); |
9c0f2dac | 1134 | return (-1); |
80b2cbf2 | 1135 | |
9c0f2dac RS |
1136 | } |
1137 | ||
1138 | #ifdef KERBEROS | |
33a2a872 | 1139 | |
9c0f2dac RS |
1140 | #define KRB_ERROR "Kerberos error connecting to POP server: " |
1141 | if (! (flags & POP_NO_KERBEROS)) | |
1142 | { | |
a27738b6 RS |
1143 | #ifdef KERBEROS5 |
1144 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1145 | { |
1146 | krb5error: | |
a27738b6 RS |
1147 | if (auth_context) |
1148 | krb5_auth_con_free (kcontext, auth_context); | |
1149 | if (kcontext) | |
1150 | krb5_free_context (kcontext); | |
e99a530f PE |
1151 | snprintf (pop_error, ERROR_MAX, "%s%s", |
1152 | KRB_ERROR, error_message (rem)); | |
de5c39cf | 1153 | CLOSESOCKET (sock); |
9c0f2dac RS |
1154 | return (-1); |
1155 | } | |
1156 | ||
a27738b6 RS |
1157 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1158 | goto krb5error; | |
80b2cbf2 | 1159 | |
a27738b6 RS |
1160 | if (rem = krb5_cc_default (kcontext, &ccdef)) |
1161 | goto krb5error; | |
1162 | ||
1163 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1164 | goto krb5error; | |
9c0f2dac | 1165 | |
33a2a872 | 1166 | for (cp = realhost; *cp; cp++) |
9c0f2dac RS |
1167 | { |
1168 | if (isupper (*cp)) | |
1169 | { | |
1170 | *cp = tolower (*cp); | |
1171 | } | |
1172 | } | |
1173 | ||
33a2a872 | 1174 | if (rem = krb5_sname_to_principal (kcontext, realhost, |
a27738b6 RS |
1175 | POP_SERVICE, FALSE, &server)) |
1176 | goto krb5error; | |
9c0f2dac | 1177 | |
a27738b6 RS |
1178 | rem = krb5_sendauth (kcontext, &auth_context, |
1179 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1180 | AP_OPTS_MUTUAL_REQUIRED, |
1181 | 0, /* no checksum */ | |
1182 | 0, /* no creds, use ccache instead */ | |
1183 | ccdef, | |
9c0f2dac | 1184 | &err_ret, |
a27738b6 | 1185 | 0, /* don't need subsession key */ |
9c0f2dac | 1186 | 0); /* don't need reply */ |
a27738b6 | 1187 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1188 | if (rem) |
1189 | { | |
e99a530f PE |
1190 | int pop_error_len = snprintf (pop_error, ERROR_MAX, "%s%s", |
1191 | KRB_ERROR, error_message (rem)); | |
5fe92a72 | 1192 | #if defined HAVE_KRB5_ERROR_TEXT |
9c0f2dac RS |
1193 | if (err_ret && err_ret->text.length) |
1194 | { | |
e99a530f PE |
1195 | int errlen = err_ret->text.length; |
1196 | snprintf (pop_error + pop_error_len, ERROR_MAX - pop_error_len, | |
1197 | " [server says '.*%s']", errlen, err_ret->text.data); | |
9c0f2dac | 1198 | } |
5fe92a72 | 1199 | #elif defined HAVE_KRB5_ERROR_E_TEXT |
e99a530f PE |
1200 | if (err_ret && err_ret->e_text && **err_ret->e_text) |
1201 | snprintf (pop_error + pop_error_len, ERRMAX - pop_error_len, | |
1202 | " [server says '%s']", *err_ret->e_text); | |
5fe92a72 | 1203 | #endif |
9c0f2dac | 1204 | if (err_ret) |
a27738b6 RS |
1205 | krb5_free_error (kcontext, err_ret); |
1206 | krb5_auth_con_free (kcontext, auth_context); | |
1207 | krb5_free_context (kcontext); | |
9c0f2dac | 1208 | |
de5c39cf | 1209 | CLOSESOCKET (sock); |
9c0f2dac RS |
1210 | return (-1); |
1211 | } | |
80b2cbf2 | 1212 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1213 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
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); | |
1221 | if (rem != KSUCCESS) | |
1222 | { | |
e99a530f | 1223 | snprintf (pop_error, ERROR_MAX, "%s%s", KRB_ERROR, krb_err_txt[rem]); |
de5c39cf | 1224 | CLOSESOCKET (sock); |
9c0f2dac RS |
1225 | return (-1); |
1226 | } | |
a27738b6 | 1227 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1228 | } |
1229 | #endif /* KERBEROS */ | |
1230 | ||
1231 | return (sock); | |
1232 | } /* socket_connection */ | |
1233 | ||
1234 | /* | |
60b0a379 | 1235 | * Function: pop_getline |
9c0f2dac RS |
1236 | * |
1237 | * Purpose: Get a line of text from the connection and return a | |
1238 | * pointer to it. The carriage return and linefeed at the end of | |
1239 | * the line are stripped, but periods at the beginnings of lines | |
1240 | * are NOT dealt with in any special way. | |
1241 | * | |
1242 | * Arguments: | |
1243 | * server The server from which to get the line of text. | |
1244 | * | |
d89d0243 KH |
1245 | * Returns: The number of characters in the line, which is returned in |
1246 | * LINE, not including the final null. A return value of 0 | |
1247 | * indicates a blank line. A negative return value indicates an | |
1248 | * error (in which case the contents of LINE are undefined. In | |
1249 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1250 | * |
60b0a379 | 1251 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1252 | * |
1253 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1254 | * |
1255 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1256 | */ |
d89d0243 | 1257 | static int |
873fbd0b | 1258 | pop_getline (popserver server, char **line) |
9c0f2dac RS |
1259 | { |
1260 | #define GETLINE_ERROR "Error reading from server: " | |
1261 | ||
1262 | int ret; | |
b6606ad8 RS |
1263 | int search_offset = 0; |
1264 | ||
9c0f2dac RS |
1265 | if (server->data) |
1266 | { | |
d89d0243 KH |
1267 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1268 | server->data); | |
9c0f2dac RS |
1269 | if (cp) |
1270 | { | |
1271 | int found; | |
1272 | int data_used; | |
1273 | ||
1274 | found = server->buffer_index; | |
1275 | data_used = (cp + 2) - server->buffer - found; | |
80b2cbf2 | 1276 | |
9c0f2dac RS |
1277 | *cp = '\0'; /* terminate the string to be returned */ |
1278 | server->data -= data_used; | |
1279 | server->buffer_index += data_used; | |
1280 | ||
1281 | if (pop_debug) | |
d89d0243 KH |
1282 | /* Embedded nulls will truncate this output prematurely, |
1283 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1284 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1285 | *line = server->buffer + found; |
1286 | return (data_used - 2); | |
9c0f2dac RS |
1287 | } |
1288 | else | |
1289 | { | |
72af86bd AS |
1290 | memmove (server->buffer, server->buffer + server->buffer_index, |
1291 | server->data); | |
b6606ad8 RS |
1292 | /* Record the fact that we've searched the data already in |
1293 | the buffer for a CRLF, so that when we search below, we | |
1294 | don't have to search the same data twice. There's a "- | |
1295 | 1" here to account for the fact that the last character | |
1296 | of the data we have may be the CR of a CRLF pair, of | |
1297 | which we haven't read the second half yet, so we may have | |
1298 | to search it again when we read more data. */ | |
1299 | search_offset = server->data - 1; | |
9c0f2dac RS |
1300 | server->buffer_index = 0; |
1301 | } | |
1302 | } | |
1303 | else | |
1304 | { | |
1305 | server->buffer_index = 0; | |
1306 | } | |
1307 | ||
1308 | while (1) | |
1309 | { | |
bbcac09c RS |
1310 | /* There's a "- 1" here to leave room for the null that we put |
1311 | at the end of the read data below. We put the null there so | |
1312 | that find_crlf knows where to stop when we call it. */ | |
1313 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1314 | { |
bbcac09c RS |
1315 | server->buffer_size += GETLINE_INCR; |
1316 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1317 | if (! server->buffer) | |
9c0f2dac | 1318 | { |
bbcac09c RS |
1319 | strcpy (pop_error, "Out of memory in pop_getline"); |
1320 | pop_trash (server); | |
1321 | return (-1); | |
0ea95737 | 1322 | } |
0ea95737 | 1323 | } |
bbcac09c RS |
1324 | ret = RECV (server->file, server->buffer + server->data, |
1325 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1326 | if (ret < 0) |
1327 | { | |
e99a530f PE |
1328 | snprintf (pop_error, ERROR_MAX, "%s%s", |
1329 | GETLINE_ERROR, strerror (errno)); | |
9c0f2dac | 1330 | pop_trash (server); |
d89d0243 | 1331 | return (-1); |
9c0f2dac RS |
1332 | } |
1333 | else if (ret == 0) | |
1334 | { | |
60b0a379 | 1335 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1336 | pop_trash (server); |
d89d0243 | 1337 | return (-1); |
9c0f2dac RS |
1338 | } |
1339 | else | |
1340 | { | |
7a481e50 | 1341 | char *cp; |
9c0f2dac | 1342 | server->data += ret; |
7a481e50 | 1343 | server->buffer[server->data] = '\0'; |
80b2cbf2 | 1344 | |
d89d0243 KH |
1345 | cp = find_crlf (server->buffer + search_offset, |
1346 | server->data - search_offset); | |
9c0f2dac RS |
1347 | if (cp) |
1348 | { | |
1349 | int data_used = (cp + 2) - server->buffer; | |
1350 | *cp = '\0'; | |
1351 | server->data -= data_used; | |
1352 | server->buffer_index = data_used; | |
1353 | ||
1354 | if (pop_debug) | |
1355 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1356 | *line = server->buffer; |
1357 | return (data_used - 2); | |
9c0f2dac | 1358 | } |
a8f44d07 RS |
1359 | /* As above, the "- 1" here is to account for the fact that |
1360 | we may have read a CR without its accompanying LF. */ | |
1361 | search_offset += ret - 1; | |
9c0f2dac RS |
1362 | } |
1363 | } | |
1364 | ||
1365 | /* NOTREACHED */ | |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * Function: sendline | |
1370 | * | |
1371 | * Purpose: Sends a line of text to the POP server. The line of text | |
1372 | * passed into this function should NOT have the carriage return | |
1373 | * and linefeed on the end of it. Periods at beginnings of lines | |
1374 | * will NOT be treated specially by this function. | |
1375 | * | |
1376 | * Arguments: | |
1377 | * server The server to which to send the text. | |
1378 | * line The line of text to send. | |
1379 | * | |
1380 | * Return value: Upon successful completion, a value of 0 will be | |
1381 | * returned. Otherwise, a non-zero value will be returned, and | |
1382 | * an error will be copied into pop_error. | |
1383 | * | |
1384 | * Side effects: Closes the connection on error. | |
1385 | */ | |
1386 | static int | |
988e88ab | 1387 | sendline (popserver server, const char *line) |
9c0f2dac RS |
1388 | { |
1389 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1390 | int ret; | |
ec641d50 KR |
1391 | char *buf; |
1392 | ||
1393 | /* Combine the string and the CR-LF into one buffer. Otherwise, two | |
1394 | reasonable network stack optimizations, Nagle's algorithm and | |
1395 | delayed acks, combine to delay us a fraction of a second on every | |
1396 | message we send. (Movemail writes line without \r\n, client | |
1397 | kernel sends packet, server kernel delays the ack to see if it | |
1398 | can combine it with data, movemail writes \r\n, client kernel | |
1399 | waits because it has unacked data already in its outgoing queue, | |
1400 | client kernel eventually times out and sends.) | |
1401 | ||
1402 | This can be something like 0.2s per command, which can add up | |
1403 | over a few dozen messages, and is a big chunk of the time we | |
1404 | spend fetching mail from a server close by. */ | |
1405 | buf = alloca (strlen (line) + 3); | |
1406 | strcpy (buf, line); | |
1407 | strcat (buf, "\r\n"); | |
1408 | ret = fullwrite (server->file, buf, strlen (buf)); | |
9c0f2dac RS |
1409 | |
1410 | if (ret < 0) | |
1411 | { | |
1412 | pop_trash (server); | |
e99a530f | 1413 | snprintf (pop_error, ERROR_MAX, "%s%s", SENDLINE_ERROR, strerror (errno)); |
9c0f2dac RS |
1414 | return (ret); |
1415 | } | |
1416 | ||
1417 | if (pop_debug) | |
1418 | fprintf (stderr, ">>> %s\n", line); | |
1419 | ||
1420 | return (0); | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | * Procedure: fullwrite | |
1425 | * | |
1426 | * Purpose: Just like write, but keeps trying until the entire string | |
1427 | * has been written. | |
1428 | * | |
1429 | * Return value: Same as write. Pop_error is not set. | |
1430 | */ | |
1431 | static int | |
873fbd0b | 1432 | fullwrite (int fd, char *buf, int nbytes) |
9c0f2dac RS |
1433 | { |
1434 | char *cp; | |
9d3f4cee | 1435 | int ret = 0; |
9c0f2dac RS |
1436 | |
1437 | cp = buf; | |
9d3f4cee | 1438 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1439 | { |
1440 | cp += ret; | |
1441 | nbytes -= ret; | |
1442 | } | |
1443 | ||
1444 | return (ret); | |
1445 | } | |
1446 | ||
1447 | /* | |
1448 | * Procedure getok | |
1449 | * | |
1450 | * Purpose: Reads a line from the server. If the return indicator is | |
1451 | * positive, return with a zero exit status. If not, return with | |
1452 | * a negative exit status. | |
1453 | * | |
1454 | * Arguments: | |
1455 | * server The server to read from. | |
80b2cbf2 | 1456 | * |
9c0f2dac RS |
1457 | * Returns: 0 for success, else for failure and puts error in pop_error. |
1458 | * | |
8e6208c5 | 1459 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1460 | */ |
1461 | static int | |
873fbd0b | 1462 | getok (popserver server) |
9c0f2dac RS |
1463 | { |
1464 | char *fromline; | |
1465 | ||
60b0a379 | 1466 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1467 | { |
1468 | return (-1); | |
1469 | } | |
1470 | ||
1471 | if (! strncmp (fromline, "+OK", 3)) | |
1472 | return (0); | |
1473 | else if (! strncmp (fromline, "-ERR", 4)) | |
1474 | { | |
e99a530f | 1475 | snprintf (pop_error, ERROR_MAX, "%s", fromline); |
9c0f2dac RS |
1476 | return (-1); |
1477 | } | |
1478 | else | |
1479 | { | |
1480 | strcpy (pop_error, | |
1481 | "Unexpected response from server; expecting +OK or -ERR"); | |
1482 | pop_trash (server); | |
1483 | return (-1); | |
1484 | } | |
80b2cbf2 | 1485 | } |
9c0f2dac RS |
1486 | |
1487 | #if 0 | |
1488 | /* | |
1489 | * Function: gettermination | |
1490 | * | |
1491 | * Purpose: Gets the next line and verifies that it is a termination | |
1492 | * line (nothing but a dot). | |
1493 | * | |
1494 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1495 | * | |
1496 | * Side effects: Closes the connection on error. | |
1497 | */ | |
1498 | static int | |
1499 | gettermination (server) | |
1500 | popserver server; | |
1501 | { | |
1502 | char *fromserver; | |
1503 | ||
60b0a379 | 1504 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1505 | return (-1); |
1506 | ||
1507 | if (strcmp (fromserver, ".")) | |
1508 | { | |
1509 | strcpy (pop_error, | |
1510 | "Unexpected response from server in gettermination"); | |
1511 | pop_trash (server); | |
1512 | return (-1); | |
1513 | } | |
1514 | ||
1515 | return (0); | |
1516 | } | |
1517 | #endif | |
1518 | ||
1519 | /* | |
1520 | * Function pop_close | |
1521 | * | |
1522 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1523 | * preserve any changes that were made and a "QUIT" command to | |
1524 | * try to get the server to quit, but ignoring any responses that | |
1525 | * are received. | |
1526 | * | |
8e6208c5 | 1527 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1528 | * Changes made to the maildrop since the session was started (or |
1529 | * since the last pop_reset) may be lost. | |
1530 | */ | |
80b2cbf2 | 1531 | void |
873fbd0b | 1532 | pop_close (popserver server) |
9c0f2dac RS |
1533 | { |
1534 | pop_trash (server); | |
1535 | free ((char *) server); | |
1536 | ||
1537 | return; | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * Function: pop_trash | |
1542 | * | |
1543 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
4d90eee4 | 1544 | * memory associated with the server. It is valid to call |
9c0f2dac RS |
1545 | * pop_close or pop_quit after this function has been called. |
1546 | */ | |
1547 | static void | |
873fbd0b | 1548 | pop_trash (popserver server) |
9c0f2dac RS |
1549 | { |
1550 | if (server->file >= 0) | |
1551 | { | |
c2668a61 RS |
1552 | /* avoid recursion; sendline can call pop_trash */ |
1553 | if (server->trash_started) | |
1554 | return; | |
1555 | server->trash_started = 1; | |
de5c39cf | 1556 | |
9c0f2dac RS |
1557 | sendline (server, "RSET"); |
1558 | sendline (server, "QUIT"); | |
1559 | ||
de5c39cf | 1560 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1561 | server->file = -1; |
1562 | if (server->buffer) | |
1563 | { | |
1564 | free (server->buffer); | |
1565 | server->buffer = 0; | |
1566 | } | |
1567 | } | |
c2668a61 RS |
1568 | |
1569 | #ifdef WINDOWSNT | |
1570 | if (have_winsock) | |
1571 | WSACleanup (); | |
1572 | #endif | |
9c0f2dac RS |
1573 | } |
1574 | ||
d89d0243 KH |
1575 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1576 | embedded nulls and has LEN characters in it not including the final | |
1577 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1578 | |
1579 | static char * | |
873fbd0b | 1580 | find_crlf (char *in_string, int len) |
9c0f2dac | 1581 | { |
d89d0243 | 1582 | while (len--) |
9c0f2dac | 1583 | { |
d89d0243 | 1584 | if (*in_string == '\r') |
8148baf9 RS |
1585 | { |
1586 | if (*++in_string == '\n') | |
1587 | return (in_string - 1); | |
1588 | } | |
1589 | else | |
1590 | in_string++; | |
9c0f2dac | 1591 | } |
d89d0243 | 1592 | return (0); |
9c0f2dac RS |
1593 | } |
1594 | ||
1595 | #endif /* MAIL_USE_POP */ |