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, |
114f9c96 | 3 | 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
294981c7 GM |
4 | |
5 | Author: Jonathan Kamens <jik@security.ov.com> | |
9c0f2dac RS |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
294981c7 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
9c0f2dac | 10 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
9c0f2dac RS |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
294981c7 GM |
20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
21 | ||
9c0f2dac | 22 | |
8148baf9 | 23 | #ifdef HAVE_CONFIG_H |
2f8fe2f4 | 24 | #include <config.h> |
8148baf9 RS |
25 | #else |
26 | #define MAIL_USE_POP | |
27 | #endif | |
c9c3d8f6 | 28 | |
8148baf9 RS |
29 | #ifdef MAIL_USE_POP |
30 | ||
9c0f2dac | 31 | #include <sys/types.h> |
c2668a61 RS |
32 | #ifdef WINDOWSNT |
33 | #include "ntlib.h" | |
34 | #include <winsock.h> | |
35 | #undef SOCKET_ERROR | |
de5c39cf RS |
36 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
37 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
38 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 39 | #else |
9c0f2dac RS |
40 | #include <netinet/in.h> |
41 | #include <sys/socket.h> | |
de5c39cf RS |
42 | #define RECV(s,buf,len,flags) read(s,buf,len) |
43 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
44 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 45 | #endif |
9c0f2dac | 46 | #include <pop.h> |
625ad89f | 47 | |
9c0f2dac RS |
48 | #ifdef sun |
49 | #include <malloc.h> | |
8148baf9 | 50 | #endif /* sun */ |
625ad89f | 51 | |
9c0f2dac RS |
52 | #ifdef HESIOD |
53 | #include <hesiod.h> | |
54 | /* | |
55 | * It really shouldn't be necessary to put this declaration here, but | |
56 | * the version of hesiod.h that Athena has installed in release 7.2 | |
57 | * doesn't declare this function; I don't know if the 7.3 version of | |
58 | * hesiod.h does. | |
59 | */ | |
60 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
61 | #endif | |
625ad89f | 62 | |
9c0f2dac | 63 | #include <pwd.h> |
9c0f2dac RS |
64 | #include <netdb.h> |
65 | #include <errno.h> | |
66 | #include <stdio.h> | |
a27738b6 RS |
67 | #ifdef STDC_HEADERS |
68 | #include <string.h> | |
020d3015 KH |
69 | #define index strchr |
70 | #endif | |
020d3015 KH |
71 | #ifdef HAVE_UNISTD_H |
72 | #include <unistd.h> | |
a27738b6 | 73 | #endif |
625ad89f | 74 | |
9c0f2dac | 75 | #ifdef KERBEROS |
a27738b6 RS |
76 | # ifdef HAVE_KRB5_H |
77 | # include <krb5.h> | |
78 | # endif | |
a27738b6 RS |
79 | # ifdef HAVE_KRB_H |
80 | # include <krb.h> | |
81 | # else | |
82 | # ifdef HAVE_KERBEROSIV_KRB_H | |
83 | # include <kerberosIV/krb.h> | |
84 | # else | |
85 | # ifdef HAVE_KERBEROS_KRB_H | |
86 | # include <kerberos/krb.h> | |
87 | # endif | |
88 | # endif | |
89 | # endif | |
90 | # ifdef HAVE_COM_ERR_H | |
91 | # include <com_err.h> | |
92 | # endif | |
8148baf9 | 93 | #endif /* KERBEROS */ |
9c0f2dac | 94 | |
8148baf9 | 95 | #ifdef KERBEROS |
a27738b6 | 96 | #ifndef KERBEROS5 |
9c0f2dac | 97 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
98 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
99 | struct sockaddr_in *, struct sockaddr_in *, | |
100 | char * */); | |
9c0f2dac | 101 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 102 | #endif /* ! KERBEROS5 */ |
8148baf9 | 103 | #endif /* KERBEROS */ |
9c0f2dac | 104 | |
c2668a61 | 105 | #ifndef WINDOWSNT |
8148baf9 | 106 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
107 | extern int h_errno; |
108 | #endif | |
c2668a61 | 109 | #endif |
9c0f2dac | 110 | |
f57e2426 J |
111 | static int socket_connection (char *, int); |
112 | static int pop_getline (popserver, char **); | |
113 | static int sendline (popserver, char *); | |
114 | static int fullwrite (int, char *, int); | |
115 | static int getok (popserver); | |
9c0f2dac | 116 | #if 0 |
f57e2426 | 117 | static int gettermination (popserver); |
9c0f2dac | 118 | #endif |
f57e2426 J |
119 | static void pop_trash (popserver); |
120 | static char *find_crlf (char *, int); | |
7a481e50 | 121 | |
5bf244f1 | 122 | #define ERROR_MAX 160 /* a pretty arbitrary size, but needs |
a47bf648 DL |
123 | to be bigger than the original |
124 | value of 80 */ | |
9c0f2dac RS |
125 | #define POP_PORT 110 |
126 | #define KPOP_PORT 1109 | |
c2668a61 | 127 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ |
9c0f2dac | 128 | #ifdef KERBEROS |
81264b38 | 129 | #define KPOP_SERVICE "kpop" /* never used: look for 20060515 to see why */ |
9c0f2dac | 130 | #endif |
9c0f2dac RS |
131 | |
132 | char pop_error[ERROR_MAX]; | |
133 | int pop_debug = 0; | |
134 | ||
135 | #ifndef min | |
136 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
137 | #endif | |
138 | ||
139 | /* | |
140 | * Function: pop_open (char *host, char *username, char *password, | |
141 | * int flags) | |
142 | * | |
143 | * Purpose: Establishes a connection with a post-office server, and | |
144 | * completes the authorization portion of the session. | |
145 | * | |
146 | * Arguments: | |
147 | * host The server host with which the connection should be | |
148 | * established. Optional. If omitted, internal | |
149 | * heuristics will be used to determine the server host, | |
150 | * if possible. | |
151 | * username | |
152 | * The username of the mail-drop to access. Optional. | |
153 | * If omitted, internal heuristics will be used to | |
154 | * determine the username, if possible. | |
155 | * password | |
156 | * The password to use for authorization. If omitted, | |
157 | * internal heuristics will be used to determine the | |
158 | * password, if possible. | |
159 | * flags A bit mask containing flags controlling certain | |
160 | * functions of the routine. Valid flags are defined in | |
161 | * the file pop.h | |
162 | * | |
163 | * Return value: Upon successful establishment of a connection, a | |
164 | * non-null popserver will be returned. Otherwise, null will be | |
165 | * returned, and the string variable pop_error will contain an | |
166 | * explanation of the error. | |
167 | */ | |
168 | popserver | |
873fbd0b | 169 | pop_open (char *host, char *username, char *password, int flags) |
9c0f2dac RS |
170 | { |
171 | int sock; | |
172 | popserver server; | |
173 | ||
174 | /* Determine the user name */ | |
175 | if (! username) | |
176 | { | |
177 | username = getenv ("USER"); | |
178 | if (! (username && *username)) | |
179 | { | |
180 | username = getlogin (); | |
181 | if (! (username && *username)) | |
182 | { | |
183 | struct passwd *passwd; | |
184 | passwd = getpwuid (getuid ()); | |
185 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
186 | { | |
187 | username = passwd->pw_name; | |
188 | } | |
189 | else | |
190 | { | |
191 | strcpy (pop_error, "Could not determine username"); | |
192 | return (0); | |
193 | } | |
194 | } | |
195 | } | |
196 | } | |
197 | ||
198 | /* | |
199 | * Determine the mail host. | |
200 | */ | |
201 | ||
202 | if (! host) | |
203 | { | |
204 | host = getenv ("MAILHOST"); | |
205 | } | |
206 | ||
207 | #ifdef HESIOD | |
208 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
209 | { | |
210 | struct hes_postoffice *office; | |
211 | office = hes_getmailhost (username); | |
212 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
213 | && office->po_name && *office->po_name && office->po_host | |
214 | && *office->po_host) | |
215 | { | |
216 | host = office->po_host; | |
217 | username = office->po_name; | |
218 | } | |
219 | } | |
220 | #endif | |
221 | ||
222 | #ifdef MAILHOST | |
223 | if (! host) | |
224 | { | |
225 | host = MAILHOST; | |
226 | } | |
227 | #endif | |
228 | ||
229 | if (! host) | |
230 | { | |
231 | strcpy (pop_error, "Could not determine POP server"); | |
232 | return (0); | |
233 | } | |
234 | ||
235 | /* Determine the password */ | |
bbcac09c RS |
236 | #ifdef KERBEROS |
237 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
9c0f2dac | 238 | #else |
bbcac09c | 239 | #define DONT_NEED_PASSWORD 0 |
9c0f2dac | 240 | #endif |
177c0ea7 | 241 | |
9c0f2dac RS |
242 | if ((! password) && (! DONT_NEED_PASSWORD)) |
243 | { | |
244 | if (! (flags & POP_NO_GETPASS)) | |
245 | { | |
246 | password = getpass ("Enter POP password:"); | |
247 | } | |
248 | if (! password) | |
249 | { | |
250 | strcpy (pop_error, "Could not determine POP password"); | |
251 | return (0); | |
252 | } | |
253 | } | |
81264b38 | 254 | if (password) /* always true, detected 20060515 */ |
bbcac09c | 255 | flags |= POP_NO_KERBEROS; |
9c0f2dac | 256 | else |
81264b38 FP |
257 | password = username; /* dead code, detected 20060515 */ |
258 | /** "kpop" service is never used: look for 20060515 to see why **/ | |
9c0f2dac RS |
259 | |
260 | sock = socket_connection (host, flags); | |
261 | if (sock == -1) | |
262 | return (0); | |
263 | ||
264 | server = (popserver) malloc (sizeof (struct _popserver)); | |
265 | if (! server) | |
266 | { | |
267 | strcpy (pop_error, "Out of memory in pop_open"); | |
268 | return (0); | |
269 | } | |
270 | server->buffer = (char *) malloc (GETLINE_MIN); | |
271 | if (! server->buffer) | |
272 | { | |
273 | strcpy (pop_error, "Out of memory in pop_open"); | |
274 | free ((char *) server); | |
275 | return (0); | |
276 | } | |
80b2cbf2 | 277 | |
9c0f2dac RS |
278 | server->file = sock; |
279 | server->data = 0; | |
280 | server->buffer_index = 0; | |
281 | server->buffer_size = GETLINE_MIN; | |
282 | server->in_multi = 0; | |
c2668a61 | 283 | server->trash_started = 0; |
9c0f2dac RS |
284 | |
285 | if (getok (server)) | |
286 | return (0); | |
287 | ||
288 | /* | |
289 | * I really shouldn't use the pop_error variable like this, but.... | |
290 | */ | |
291 | if (strlen (username) > ERROR_MAX - 6) | |
292 | { | |
293 | pop_close (server); | |
294 | strcpy (pop_error, | |
295 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
296 | return (0); | |
297 | } | |
298 | sprintf (pop_error, "USER %s", username); | |
299 | ||
300 | if (sendline (server, pop_error) || getok (server)) | |
301 | { | |
302 | return (0); | |
303 | } | |
304 | ||
305 | if (strlen (password) > ERROR_MAX - 6) | |
306 | { | |
307 | pop_close (server); | |
308 | strcpy (pop_error, | |
309 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
310 | return (0); | |
311 | } | |
312 | sprintf (pop_error, "PASS %s", password); | |
313 | ||
314 | if (sendline (server, pop_error) || getok (server)) | |
315 | { | |
316 | return (0); | |
317 | } | |
318 | ||
319 | return (server); | |
320 | } | |
321 | ||
322 | /* | |
323 | * Function: pop_stat | |
324 | * | |
325 | * Purpose: Issue the STAT command to the server and return (in the | |
326 | * value parameters) the number of messages in the maildrop and | |
327 | * the total size of the maildrop. | |
328 | * | |
329 | * Return value: 0 on success, or non-zero with an error in pop_error | |
330 | * in failure. | |
331 | * | |
332 | * Side effects: On failure, may make further operations on the | |
333 | * connection impossible. | |
334 | */ | |
335 | int | |
873fbd0b | 336 | pop_stat (popserver server, int *count, int *size) |
9c0f2dac RS |
337 | { |
338 | char *fromserver; | |
0b074993 | 339 | char *end_ptr; |
9c0f2dac RS |
340 | |
341 | if (server->in_multi) | |
342 | { | |
343 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
344 | return (-1); | |
345 | } | |
80b2cbf2 | 346 | |
60b0a379 | 347 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
348 | return (-1); |
349 | ||
350 | if (strncmp (fromserver, "+OK ", 4)) | |
351 | { | |
352 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
353 | { | |
354 | strncpy (pop_error, fromserver, ERROR_MAX); | |
355 | } | |
356 | else | |
357 | { | |
358 | strcpy (pop_error, | |
359 | "Unexpected response from POP server in pop_stat"); | |
360 | pop_trash (server); | |
361 | } | |
362 | return (-1); | |
363 | } | |
364 | ||
0b074993 CY |
365 | errno = 0; |
366 | *count = strtol (&fromserver[4], &end_ptr, 10); | |
367 | /* Check validity of string-to-integer conversion. */ | |
59a431d6 | 368 | if (fromserver + 4 == end_ptr || *end_ptr != ' ' || errno) |
0b074993 CY |
369 | { |
370 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
371 | pop_trash (server); | |
372 | return (-1); | |
373 | } | |
80b2cbf2 | 374 | |
59a431d6 | 375 | fromserver = end_ptr; |
9c0f2dac | 376 | |
0b074993 CY |
377 | errno = 0; |
378 | *size = strtol (fromserver + 1, &end_ptr, 10); | |
59a431d6 | 379 | if (fromserver + 1 == end_ptr || errno) |
0b074993 CY |
380 | { |
381 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
382 | pop_trash (server); | |
383 | return (-1); | |
384 | } | |
9c0f2dac RS |
385 | |
386 | return (0); | |
387 | } | |
388 | ||
389 | /* | |
390 | * Function: pop_list | |
391 | * | |
392 | * Purpose: Performs the POP "list" command and returns (in value | |
393 | * parameters) two malloc'd zero-terminated arrays -- one of | |
394 | * message IDs, and a parallel one of sizes. | |
395 | * | |
396 | * Arguments: | |
397 | * server The pop connection to talk to. | |
398 | * message The number of the one message about which to get | |
399 | * information, or 0 to get information about all | |
400 | * messages. | |
401 | * | |
402 | * Return value: 0 on success, non-zero with error in pop_error on | |
403 | * failure. | |
404 | * | |
405 | * Side effects: On failure, may make further operations on the | |
406 | * connection impossible. | |
407 | */ | |
408 | int | |
873fbd0b | 409 | pop_list (popserver server, int message, int **IDs, int **sizes) |
9c0f2dac RS |
410 | { |
411 | int how_many, i; | |
412 | char *fromserver; | |
413 | ||
414 | if (server->in_multi) | |
415 | { | |
416 | strcpy (pop_error, "In multi-line query in pop_list"); | |
417 | return (-1); | |
418 | } | |
419 | ||
420 | if (message) | |
421 | how_many = 1; | |
422 | else | |
423 | { | |
424 | int count, size; | |
425 | if (pop_stat (server, &count, &size)) | |
426 | return (-1); | |
427 | how_many = count; | |
428 | } | |
429 | ||
430 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
431 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
432 | if (! (*IDs && *sizes)) | |
433 | { | |
434 | strcpy (pop_error, "Out of memory in pop_list"); | |
435 | return (-1); | |
436 | } | |
437 | ||
438 | if (message) | |
439 | { | |
440 | sprintf (pop_error, "LIST %d", message); | |
441 | if (sendline (server, pop_error)) | |
442 | { | |
443 | free ((char *) *IDs); | |
444 | free ((char *) *sizes); | |
445 | return (-1); | |
446 | } | |
60b0a379 | 447 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
448 | { |
449 | free ((char *) *IDs); | |
450 | free ((char *) *sizes); | |
451 | return (-1); | |
452 | } | |
453 | if (strncmp (fromserver, "+OK ", 4)) | |
454 | { | |
455 | if (! strncmp (fromserver, "-ERR", 4)) | |
456 | strncpy (pop_error, fromserver, ERROR_MAX); | |
457 | else | |
458 | { | |
459 | strcpy (pop_error, | |
460 | "Unexpected response from server in pop_list"); | |
461 | pop_trash (server); | |
462 | } | |
463 | free ((char *) *IDs); | |
464 | free ((char *) *sizes); | |
465 | return (-1); | |
466 | } | |
467 | (*IDs)[0] = atoi (&fromserver[4]); | |
468 | fromserver = index (&fromserver[4], ' '); | |
469 | if (! fromserver) | |
470 | { | |
471 | strcpy (pop_error, | |
472 | "Badly formatted response from server in pop_list"); | |
473 | pop_trash (server); | |
474 | free ((char *) *IDs); | |
475 | free ((char *) *sizes); | |
476 | return (-1); | |
477 | } | |
478 | (*sizes)[0] = atoi (fromserver); | |
479 | (*IDs)[1] = (*sizes)[1] = 0; | |
480 | return (0); | |
481 | } | |
482 | else | |
483 | { | |
484 | if (pop_multi_first (server, "LIST", &fromserver)) | |
485 | { | |
486 | free ((char *) *IDs); | |
487 | free ((char *) *sizes); | |
488 | return (-1); | |
489 | } | |
490 | for (i = 0; i < how_many; i++) | |
491 | { | |
d89d0243 | 492 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
493 | { |
494 | free ((char *) *IDs); | |
495 | free ((char *) *sizes); | |
496 | return (-1); | |
497 | } | |
498 | (*IDs)[i] = atoi (fromserver); | |
499 | fromserver = index (fromserver, ' '); | |
500 | if (! fromserver) | |
501 | { | |
502 | strcpy (pop_error, | |
503 | "Badly formatted response from server in pop_list"); | |
504 | free ((char *) *IDs); | |
505 | free ((char *) *sizes); | |
506 | pop_trash (server); | |
507 | return (-1); | |
508 | } | |
509 | (*sizes)[i] = atoi (fromserver); | |
510 | } | |
d89d0243 | 511 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
512 | { |
513 | free ((char *) *IDs); | |
514 | free ((char *) *sizes); | |
515 | return (-1); | |
516 | } | |
517 | else if (fromserver) | |
518 | { | |
519 | strcpy (pop_error, | |
520 | "Too many response lines from server in pop_list"); | |
521 | free ((char *) *IDs); | |
522 | free ((char *) *sizes); | |
523 | return (-1); | |
524 | } | |
525 | (*IDs)[i] = (*sizes)[i] = 0; | |
526 | return (0); | |
527 | } | |
528 | } | |
529 | ||
530 | /* | |
531 | * Function: pop_retrieve | |
532 | * | |
533 | * Purpose: Retrieve a specified message from the maildrop. | |
534 | * | |
535 | * Arguments: | |
536 | * server The server to retrieve from. | |
537 | * message The message number to retrieve. | |
538 | * markfrom | |
539 | * If true, then mark the string "From " at the beginning | |
540 | * of lines with '>'. | |
d89d0243 KH |
541 | * msg_buf Output parameter to which a buffer containing the |
542 | * message is assigned. | |
177c0ea7 | 543 | * |
d89d0243 KH |
544 | * Return value: The number of bytes in msg_buf, which may contain |
545 | * embedded nulls, not including its final null, or -1 on error | |
546 | * with pop_error set. | |
9c0f2dac RS |
547 | * |
548 | * Side effects: May kill connection on error. | |
549 | */ | |
d89d0243 | 550 | int |
873fbd0b | 551 | pop_retrieve (popserver server, int message, int markfrom, char **msg_buf) |
9c0f2dac RS |
552 | { |
553 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
554 | char *ptr, *fromserver; | |
555 | int ret; | |
556 | ||
557 | if (server->in_multi) | |
558 | { | |
559 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 560 | return (-1); |
9c0f2dac RS |
561 | } |
562 | ||
563 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 564 | return (-1); |
9c0f2dac RS |
565 | |
566 | if (pop_retrieve_first (server, message, &fromserver)) | |
567 | { | |
d89d0243 | 568 | return (-1); |
9c0f2dac RS |
569 | } |
570 | ||
571 | /* | |
572 | * The "5" below is an arbitrary constant -- I assume that if | |
573 | * there are "From" lines in the text to be marked, there | |
574 | * probably won't be more than 5 of them. If there are, I | |
575 | * allocate more space for them below. | |
576 | */ | |
577 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 578 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
579 | free ((char *) IDs); |
580 | free ((char *) sizes); | |
581 | ||
582 | if (! ptr) | |
583 | { | |
584 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
585 | pop_retrieve_flush (server); | |
d89d0243 | 586 | return (-1); |
9c0f2dac RS |
587 | } |
588 | ||
d89d0243 | 589 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 590 | { |
9c0f2dac RS |
591 | if (! fromserver) |
592 | { | |
593 | ptr[cp] = '\0'; | |
d89d0243 KH |
594 | *msg_buf = ptr; |
595 | return (cp); | |
9c0f2dac RS |
596 | } |
597 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
598 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
599 | fromserver[4] == ' ') | |
600 | { | |
601 | if (++fromcount == 5) | |
602 | { | |
603 | bufsize += 5; | |
7d665945 | 604 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
605 | if (! ptr) |
606 | { | |
607 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
608 | pop_retrieve_flush (server); | |
d89d0243 | 609 | return (-1); |
9c0f2dac RS |
610 | } |
611 | fromcount = 0; | |
612 | } | |
613 | ptr[cp++] = '>'; | |
614 | } | |
72af86bd | 615 | memcpy (&ptr[cp], fromserver, ret); |
d89d0243 | 616 | cp += ret; |
9c0f2dac RS |
617 | ptr[cp++] = '\n'; |
618 | } | |
619 | ||
d89d0243 KH |
620 | free (ptr); |
621 | return (-1); | |
177c0ea7 | 622 | } |
9c0f2dac RS |
623 | |
624 | int | |
873fbd0b | 625 | pop_retrieve_first (popserver server, int message, char **response) |
9c0f2dac RS |
626 | { |
627 | sprintf (pop_error, "RETR %d", message); | |
628 | return (pop_multi_first (server, pop_error, response)); | |
629 | } | |
630 | ||
d89d0243 KH |
631 | /* |
632 | Returns a negative number on error, 0 to indicate that the data has | |
633 | all been read (i.e., the server has returned a "." termination | |
634 | line), or a positive number indicating the number of bytes in the | |
635 | returned buffer (which is null-terminated and may contain embedded | |
636 | nulls, but the returned bytecount doesn't include the final null). | |
637 | */ | |
638 | ||
9c0f2dac | 639 | int |
873fbd0b | 640 | pop_retrieve_next (popserver server, char **line) |
9c0f2dac RS |
641 | { |
642 | return (pop_multi_next (server, line)); | |
643 | } | |
644 | ||
645 | int | |
873fbd0b | 646 | pop_retrieve_flush (popserver server) |
9c0f2dac RS |
647 | { |
648 | return (pop_multi_flush (server)); | |
649 | } | |
650 | ||
651 | int | |
873fbd0b | 652 | pop_top_first (popserver server, int message, int lines, char **response) |
9c0f2dac RS |
653 | { |
654 | sprintf (pop_error, "TOP %d %d", message, lines); | |
655 | return (pop_multi_first (server, pop_error, response)); | |
656 | } | |
657 | ||
d89d0243 KH |
658 | /* |
659 | Returns a negative number on error, 0 to indicate that the data has | |
660 | all been read (i.e., the server has returned a "." termination | |
661 | line), or a positive number indicating the number of bytes in the | |
662 | returned buffer (which is null-terminated and may contain embedded | |
663 | nulls, but the returned bytecount doesn't include the final null). | |
664 | */ | |
665 | ||
9c0f2dac | 666 | int |
873fbd0b | 667 | pop_top_next (popserver server, char **line) |
9c0f2dac RS |
668 | { |
669 | return (pop_multi_next (server, line)); | |
670 | } | |
671 | ||
672 | int | |
873fbd0b | 673 | pop_top_flush (popserver server) |
9c0f2dac RS |
674 | { |
675 | return (pop_multi_flush (server)); | |
676 | } | |
677 | ||
678 | int | |
873fbd0b | 679 | pop_multi_first (popserver server, char *command, char **response) |
9c0f2dac RS |
680 | { |
681 | if (server->in_multi) | |
682 | { | |
683 | strcpy (pop_error, | |
684 | "Already in multi-line query in pop_multi_first"); | |
685 | return (-1); | |
686 | } | |
687 | ||
60b0a379 | 688 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
689 | { |
690 | return (-1); | |
691 | } | |
692 | ||
693 | if (0 == strncmp (*response, "-ERR", 4)) | |
694 | { | |
695 | strncpy (pop_error, *response, ERROR_MAX); | |
696 | return (-1); | |
697 | } | |
698 | else if (0 == strncmp (*response, "+OK", 3)) | |
699 | { | |
700 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
701 | server->in_multi = 1; | |
702 | return (0); | |
703 | } | |
704 | else | |
705 | { | |
706 | strcpy (pop_error, | |
707 | "Unexpected response from server in pop_multi_first"); | |
708 | return (-1); | |
709 | } | |
710 | } | |
711 | ||
d89d0243 KH |
712 | /* |
713 | Read the next line of data from SERVER and place a pointer to it | |
714 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
715 | (i.e., the server has returned a line containing only "."), or a | |
716 | positive number indicating the number of bytes in the LINE buffer | |
717 | (not including the final null). The data in that buffer may contain | |
718 | embedded nulls, but does not contain the final CRLF. When returning | |
719 | 0, LINE is set to null. */ | |
720 | ||
9c0f2dac | 721 | int |
873fbd0b | 722 | pop_multi_next (popserver server, char **line) |
9c0f2dac RS |
723 | { |
724 | char *fromserver; | |
d89d0243 | 725 | int ret; |
9c0f2dac RS |
726 | |
727 | if (! server->in_multi) | |
728 | { | |
729 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
730 | return (-1); | |
731 | } | |
732 | ||
60b0a379 | 733 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
734 | { |
735 | return (-1); | |
736 | } | |
737 | ||
738 | if (fromserver[0] == '.') | |
739 | { | |
740 | if (! fromserver[1]) | |
741 | { | |
742 | *line = 0; | |
743 | server->in_multi = 0; | |
744 | return (0); | |
745 | } | |
746 | else | |
747 | { | |
748 | *line = fromserver + 1; | |
d89d0243 | 749 | return (ret - 1); |
9c0f2dac RS |
750 | } |
751 | } | |
752 | else | |
753 | { | |
754 | *line = fromserver; | |
d89d0243 | 755 | return (ret); |
9c0f2dac RS |
756 | } |
757 | } | |
758 | ||
759 | int | |
873fbd0b | 760 | pop_multi_flush (popserver server) |
9c0f2dac RS |
761 | { |
762 | char *line; | |
d89d0243 | 763 | int ret; |
9c0f2dac RS |
764 | |
765 | if (! server->in_multi) | |
766 | { | |
767 | return (0); | |
768 | } | |
769 | ||
d89d0243 | 770 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 771 | { |
d89d0243 KH |
772 | if (ret < 0) |
773 | return (-1); | |
9c0f2dac RS |
774 | } |
775 | ||
d89d0243 | 776 | return (0); |
9c0f2dac RS |
777 | } |
778 | ||
779 | /* Function: pop_delete | |
780 | * | |
781 | * Purpose: Delete a specified message. | |
782 | * | |
783 | * Arguments: | |
784 | * server Server from which to delete the message. | |
785 | * message Message to delete. | |
786 | * | |
787 | * Return value: 0 on success, non-zero with error in pop_error | |
788 | * otherwise. | |
789 | */ | |
790 | int | |
873fbd0b | 791 | pop_delete (popserver server, int message) |
9c0f2dac RS |
792 | { |
793 | if (server->in_multi) | |
794 | { | |
795 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
796 | return (-1); | |
797 | } | |
798 | ||
799 | sprintf (pop_error, "DELE %d", message); | |
800 | ||
801 | if (sendline (server, pop_error) || getok (server)) | |
802 | return (-1); | |
803 | ||
804 | return (0); | |
805 | } | |
806 | ||
807 | /* | |
808 | * Function: pop_noop | |
809 | * | |
810 | * Purpose: Send a noop command to the server. | |
811 | * | |
812 | * Argument: | |
813 | * server The server to send to. | |
814 | * | |
815 | * Return value: 0 on success, non-zero with error in pop_error | |
816 | * otherwise. | |
817 | * | |
818 | * Side effects: Closes connection on error. | |
819 | */ | |
820 | int | |
873fbd0b | 821 | pop_noop (popserver server) |
9c0f2dac RS |
822 | { |
823 | if (server->in_multi) | |
824 | { | |
825 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
826 | return (-1); | |
827 | } | |
828 | ||
829 | if (sendline (server, "NOOP") || getok (server)) | |
830 | return (-1); | |
831 | ||
832 | return (0); | |
833 | } | |
834 | ||
835 | /* | |
836 | * Function: pop_last | |
837 | * | |
838 | * Purpose: Find out the highest seen message from the server. | |
839 | * | |
840 | * Arguments: | |
841 | * server The server. | |
842 | * | |
843 | * Return value: If successful, the highest seen message, which is | |
844 | * greater than or equal to 0. Otherwise, a negative number with | |
845 | * the error explained in pop_error. | |
846 | * | |
847 | * Side effects: Closes the connection on error. | |
848 | */ | |
849 | int | |
873fbd0b | 850 | pop_last (popserver server) |
9c0f2dac RS |
851 | { |
852 | char *fromserver; | |
80b2cbf2 | 853 | |
9c0f2dac RS |
854 | if (server->in_multi) |
855 | { | |
856 | strcpy (pop_error, "In multi-line query in pop_last"); | |
857 | return (-1); | |
858 | } | |
859 | ||
860 | if (sendline (server, "LAST")) | |
861 | return (-1); | |
862 | ||
60b0a379 | 863 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
864 | return (-1); |
865 | ||
866 | if (! strncmp (fromserver, "-ERR", 4)) | |
867 | { | |
868 | strncpy (pop_error, fromserver, ERROR_MAX); | |
869 | return (-1); | |
870 | } | |
871 | else if (strncmp (fromserver, "+OK ", 4)) | |
872 | { | |
873 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
874 | pop_trash (server); | |
875 | return (-1); | |
876 | } | |
877 | else | |
878 | { | |
0b074993 CY |
879 | char *end_ptr; |
880 | int count; | |
881 | errno = 0; | |
882 | count = strtol (&fromserver[4], &end_ptr, 10); | |
59a431d6 | 883 | if (fromserver + 4 == end_ptr || errno) |
0b074993 CY |
884 | { |
885 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
886 | pop_trash (server); | |
887 | return (-1); | |
888 | } | |
889 | return count; | |
9c0f2dac RS |
890 | } |
891 | } | |
892 | ||
893 | /* | |
894 | * Function: pop_reset | |
895 | * | |
896 | * Purpose: Reset the server to its initial connect state | |
897 | * | |
898 | * Arguments: | |
899 | * server The server. | |
900 | * | |
901 | * Return value: 0 for success, non-0 with error in pop_error | |
902 | * otherwise. | |
903 | * | |
904 | * Side effects: Closes the connection on error. | |
905 | */ | |
906 | int | |
873fbd0b | 907 | pop_reset (popserver server) |
9c0f2dac RS |
908 | { |
909 | if (pop_retrieve_flush (server)) | |
910 | { | |
911 | return (-1); | |
912 | } | |
913 | ||
914 | if (sendline (server, "RSET") || getok (server)) | |
915 | return (-1); | |
916 | ||
917 | return (0); | |
918 | } | |
919 | ||
920 | /* | |
921 | * Function: pop_quit | |
922 | * | |
923 | * Purpose: Quit the connection to the server, | |
924 | * | |
925 | * Arguments: | |
926 | * server The server to quit. | |
927 | * | |
928 | * Return value: 0 for success, non-zero otherwise with error in | |
929 | * pop_error. | |
930 | * | |
8e6208c5 | 931 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
932 | * function is called, even if an error occurs. |
933 | */ | |
934 | int | |
873fbd0b | 935 | pop_quit (popserver server) |
9c0f2dac RS |
936 | { |
937 | int ret = 0; | |
938 | ||
939 | if (server->file >= 0) | |
940 | { | |
941 | if (pop_retrieve_flush (server)) | |
942 | { | |
943 | ret = -1; | |
944 | } | |
945 | ||
946 | if (sendline (server, "QUIT") || getok (server)) | |
947 | { | |
948 | ret = -1; | |
949 | } | |
950 | ||
951 | close (server->file); | |
952 | } | |
953 | ||
c2cd06e6 | 954 | free (server->buffer); |
9c0f2dac RS |
955 | free ((char *) server); |
956 | ||
957 | return (ret); | |
958 | } | |
959 | ||
c2668a61 RS |
960 | #ifdef WINDOWSNT |
961 | static int have_winsock = 0; | |
962 | #endif | |
963 | ||
9c0f2dac RS |
964 | /* |
965 | * Function: socket_connection | |
966 | * | |
967 | * Purpose: Opens the network connection with the mail host, without | |
968 | * doing any sort of I/O with it or anything. | |
969 | * | |
970 | * Arguments: | |
971 | * host The host to which to connect. | |
972 | * flags Option flags. | |
80b2cbf2 | 973 | * |
9c0f2dac RS |
974 | * Return value: A file descriptor indicating the connection, or -1 |
975 | * indicating failure, in which case an error has been copied | |
976 | * into pop_error. | |
977 | */ | |
978 | static int | |
873fbd0b | 979 | socket_connection (char *host, int flags) |
9c0f2dac | 980 | { |
33a2a872 JD |
981 | #ifdef HAVE_GETADDRINFO |
982 | struct addrinfo *res, *it; | |
983 | struct addrinfo hints; | |
984 | int ret; | |
985 | #else /* !HAVE_GETADDRINFO */ | |
9c0f2dac | 986 | struct hostent *hostent; |
33a2a872 | 987 | #endif |
9c0f2dac RS |
988 | struct servent *servent; |
989 | struct sockaddr_in addr; | |
990 | char found_port = 0; | |
991 | char *service; | |
992 | int sock; | |
ee15f312 | 993 | char *realhost; |
9c0f2dac | 994 | #ifdef KERBEROS |
a27738b6 | 995 | #ifdef KERBEROS5 |
9c0f2dac | 996 | krb5_error_code rem; |
a27738b6 RS |
997 | krb5_context kcontext = 0; |
998 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
999 | krb5_ccache ccdef; |
1000 | krb5_principal client, server; | |
1001 | krb5_error *err_ret; | |
1002 | register char *cp; | |
1003 | #else | |
1004 | KTEXT ticket; | |
1005 | MSG_DAT msg_data; | |
1006 | CREDENTIALS cred; | |
1007 | Key_schedule schedule; | |
1008 | int rem; | |
a27738b6 | 1009 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1010 | #endif /* KERBEROS */ |
1011 | ||
1012 | int try_count = 0; | |
33a2a872 | 1013 | int connect_ok; |
9c0f2dac | 1014 | |
c2668a61 RS |
1015 | #ifdef WINDOWSNT |
1016 | { | |
1017 | WSADATA winsockData; | |
1018 | if (WSAStartup (0x101, &winsockData) == 0) | |
1019 | have_winsock = 1; | |
1020 | } | |
1021 | #endif | |
1022 | ||
72af86bd | 1023 | memset (&addr, 0, sizeof (addr)); |
9c0f2dac RS |
1024 | addr.sin_family = AF_INET; |
1025 | ||
81264b38 | 1026 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1027 | #ifdef KERBEROS |
1028 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1029 | #else | |
1030 | service = POP_SERVICE; | |
1031 | #endif | |
1032 | ||
1033 | #ifdef HESIOD | |
1034 | if (! (flags & POP_NO_HESIOD)) | |
1035 | { | |
1036 | servent = hes_getservbyname (service, "tcp"); | |
1037 | if (servent) | |
1038 | { | |
1039 | addr.sin_port = servent->s_port; | |
1040 | found_port = 1; | |
1041 | } | |
1042 | } | |
1043 | #endif | |
1044 | if (! found_port) | |
1045 | { | |
1046 | servent = getservbyname (service, "tcp"); | |
1047 | if (servent) | |
1048 | { | |
1049 | addr.sin_port = servent->s_port; | |
1050 | } | |
1051 | else | |
1052 | { | |
81264b38 | 1053 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1054 | #ifdef KERBEROS |
1055 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1056 | POP_PORT : KPOP_PORT); | |
1057 | #else | |
1058 | addr.sin_port = htons (POP_PORT); | |
1059 | #endif | |
1060 | } | |
1061 | } | |
1062 | ||
a27738b6 | 1063 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1064 | |
1065 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1066 | if (sock < 0) | |
1067 | { | |
a27738b6 | 1068 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1069 | strncat (pop_error, strerror (errno), |
a27738b6 | 1070 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac | 1071 | return (-1); |
80b2cbf2 | 1072 | |
9c0f2dac RS |
1073 | } |
1074 | ||
33a2a872 JD |
1075 | #ifdef HAVE_GETADDRINFO |
1076 | memset (&hints, 0, sizeof(hints)); | |
1077 | hints.ai_socktype = SOCK_STREAM; | |
7291159e | 1078 | hints.ai_flags = AI_CANONNAME; |
33a2a872 JD |
1079 | hints.ai_family = AF_INET; |
1080 | do | |
1081 | { | |
1082 | ret = getaddrinfo (host, service, &hints, &res); | |
1083 | try_count++; | |
1084 | if (ret != 0 && (ret != EAI_AGAIN || try_count == 5)) | |
1085 | { | |
1086 | strcpy (pop_error, "Could not determine POP server's address"); | |
1087 | return (-1); | |
1088 | } | |
1089 | } while (ret != 0); | |
1090 | ||
1091 | if (ret == 0) | |
1092 | { | |
1093 | it = res; | |
1094 | while (it) | |
1095 | { | |
1096 | if (it->ai_addrlen == sizeof (addr)) | |
1097 | { | |
1098 | struct sockaddr_in *in_a = (struct sockaddr_in *) it->ai_addr; | |
72af86bd | 1099 | memcpy (&addr.sin_addr, &in_a->sin_addr, sizeof (addr.sin_addr)); |
33a2a872 JD |
1100 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1101 | break; | |
1102 | } | |
1103 | it = it->ai_next; | |
1104 | } | |
1105 | connect_ok = it != NULL; | |
ee15f312 JD |
1106 | if (connect_ok) |
1107 | { | |
1108 | realhost = alloca (strlen (it->ai_canonname) + 1); | |
1109 | strcpy (realhost, it->ai_canonname); | |
1110 | } | |
33a2a872 JD |
1111 | freeaddrinfo (res); |
1112 | } | |
1113 | #else /* !HAVE_GETADDRINFO */ | |
b72f3bcb EZ |
1114 | do |
1115 | { | |
1116 | hostent = gethostbyname (host); | |
1117 | try_count++; | |
1118 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1119 | { | |
1120 | strcpy (pop_error, "Could not determine POP server's address"); | |
1121 | return (-1); | |
1122 | } | |
1123 | } while (! hostent); | |
1124 | ||
9c0f2dac RS |
1125 | while (*hostent->h_addr_list) |
1126 | { | |
72af86bd | 1127 | memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length); |
9c0f2dac RS |
1128 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1129 | break; | |
1130 | hostent->h_addr_list++; | |
1131 | } | |
33a2a872 | 1132 | connect_ok = *hostent->h_addr_list != NULL; |
ee15f312 JD |
1133 | if (! connect_ok) |
1134 | { | |
1135 | realhost = alloca (strlen (hostent->h_name) + 1); | |
1136 | strcpy (realhost, hostent->h_name); | |
1137 | } | |
1138 | ||
33a2a872 | 1139 | #endif /* !HAVE_GETADDRINFO */ |
9c0f2dac RS |
1140 | |
1141 | #define CONNECT_ERROR "Could not connect to POP server: " | |
80b2cbf2 | 1142 | |
33a2a872 | 1143 | if (! connect_ok) |
9c0f2dac | 1144 | { |
de5c39cf | 1145 | CLOSESOCKET (sock); |
9c0f2dac RS |
1146 | strcpy (pop_error, CONNECT_ERROR); |
1147 | strncat (pop_error, strerror (errno), | |
1148 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1149 | return (-1); | |
80b2cbf2 | 1150 | |
9c0f2dac RS |
1151 | } |
1152 | ||
1153 | #ifdef KERBEROS | |
33a2a872 | 1154 | |
9c0f2dac RS |
1155 | #define KRB_ERROR "Kerberos error connecting to POP server: " |
1156 | if (! (flags & POP_NO_KERBEROS)) | |
1157 | { | |
a27738b6 RS |
1158 | #ifdef KERBEROS5 |
1159 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1160 | { |
1161 | krb5error: | |
a27738b6 RS |
1162 | if (auth_context) |
1163 | krb5_auth_con_free (kcontext, auth_context); | |
1164 | if (kcontext) | |
1165 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1166 | strcpy (pop_error, KRB_ERROR); |
1167 | strncat (pop_error, error_message (rem), | |
1168 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1169 | CLOSESOCKET (sock); |
9c0f2dac RS |
1170 | return (-1); |
1171 | } | |
1172 | ||
a27738b6 RS |
1173 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1174 | goto krb5error; | |
80b2cbf2 | 1175 | |
a27738b6 RS |
1176 | if (rem = krb5_cc_default (kcontext, &ccdef)) |
1177 | goto krb5error; | |
1178 | ||
1179 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1180 | goto krb5error; | |
9c0f2dac | 1181 | |
33a2a872 | 1182 | for (cp = realhost; *cp; cp++) |
9c0f2dac RS |
1183 | { |
1184 | if (isupper (*cp)) | |
1185 | { | |
1186 | *cp = tolower (*cp); | |
1187 | } | |
1188 | } | |
1189 | ||
33a2a872 | 1190 | if (rem = krb5_sname_to_principal (kcontext, realhost, |
a27738b6 RS |
1191 | POP_SERVICE, FALSE, &server)) |
1192 | goto krb5error; | |
9c0f2dac | 1193 | |
a27738b6 RS |
1194 | rem = krb5_sendauth (kcontext, &auth_context, |
1195 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1196 | AP_OPTS_MUTUAL_REQUIRED, |
1197 | 0, /* no checksum */ | |
1198 | 0, /* no creds, use ccache instead */ | |
1199 | ccdef, | |
9c0f2dac | 1200 | &err_ret, |
a27738b6 | 1201 | 0, /* don't need subsession key */ |
9c0f2dac | 1202 | 0); /* don't need reply */ |
a27738b6 | 1203 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1204 | if (rem) |
1205 | { | |
5fe92a72 CY |
1206 | strcpy (pop_error, KRB_ERROR); |
1207 | strncat (pop_error, error_message (rem), | |
1208 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1209 | #if defined HAVE_KRB5_ERROR_TEXT | |
9c0f2dac RS |
1210 | if (err_ret && err_ret->text.length) |
1211 | { | |
9c0f2dac RS |
1212 | strncat (pop_error, " [server says '", |
1213 | ERROR_MAX - strlen (pop_error) - 1); | |
1214 | strncat (pop_error, err_ret->text.data, | |
1215 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1216 | err_ret->text.length)); | |
1217 | strncat (pop_error, "']", | |
1218 | ERROR_MAX - strlen (pop_error) - 1); | |
1219 | } | |
5fe92a72 CY |
1220 | #elif defined HAVE_KRB5_ERROR_E_TEXT |
1221 | if (err_ret && err_ret->e_text && strlen(*err_ret->e_text)) | |
9c0f2dac | 1222 | { |
5fe92a72 CY |
1223 | strncat (pop_error, " [server says '", |
1224 | ERROR_MAX - strlen (pop_error) - 1); | |
1225 | strncat (pop_error, *err_ret->e_text, | |
1226 | ERROR_MAX - strlen (pop_error) - 1); | |
1227 | strncat (pop_error, "']", | |
1228 | ERROR_MAX - strlen (pop_error) - 1); | |
9c0f2dac | 1229 | } |
5fe92a72 | 1230 | #endif |
9c0f2dac | 1231 | if (err_ret) |
a27738b6 RS |
1232 | krb5_free_error (kcontext, err_ret); |
1233 | krb5_auth_con_free (kcontext, auth_context); | |
1234 | krb5_free_context (kcontext); | |
9c0f2dac | 1235 | |
de5c39cf | 1236 | CLOSESOCKET (sock); |
9c0f2dac RS |
1237 | return (-1); |
1238 | } | |
80b2cbf2 | 1239 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1240 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1241 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, |
1242 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1243 | (unsigned long) 0, &msg_data, &cred, schedule, |
1244 | (struct sockaddr_in *) 0, | |
1245 | (struct sockaddr_in *) 0, | |
1246 | "KPOPV0.1"); | |
1247 | free ((char *) ticket); | |
1248 | if (rem != KSUCCESS) | |
1249 | { | |
1250 | strcpy (pop_error, KRB_ERROR); | |
1251 | strncat (pop_error, krb_err_txt[rem], | |
1252 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1253 | CLOSESOCKET (sock); |
9c0f2dac RS |
1254 | return (-1); |
1255 | } | |
a27738b6 | 1256 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1257 | } |
1258 | #endif /* KERBEROS */ | |
1259 | ||
1260 | return (sock); | |
1261 | } /* socket_connection */ | |
1262 | ||
1263 | /* | |
60b0a379 | 1264 | * Function: pop_getline |
9c0f2dac RS |
1265 | * |
1266 | * Purpose: Get a line of text from the connection and return a | |
1267 | * pointer to it. The carriage return and linefeed at the end of | |
1268 | * the line are stripped, but periods at the beginnings of lines | |
1269 | * are NOT dealt with in any special way. | |
1270 | * | |
1271 | * Arguments: | |
1272 | * server The server from which to get the line of text. | |
1273 | * | |
d89d0243 KH |
1274 | * Returns: The number of characters in the line, which is returned in |
1275 | * LINE, not including the final null. A return value of 0 | |
1276 | * indicates a blank line. A negative return value indicates an | |
1277 | * error (in which case the contents of LINE are undefined. In | |
1278 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1279 | * |
60b0a379 | 1280 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1281 | * |
1282 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1283 | * |
1284 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1285 | */ |
d89d0243 | 1286 | static int |
873fbd0b | 1287 | pop_getline (popserver server, char **line) |
9c0f2dac RS |
1288 | { |
1289 | #define GETLINE_ERROR "Error reading from server: " | |
1290 | ||
1291 | int ret; | |
b6606ad8 RS |
1292 | int search_offset = 0; |
1293 | ||
9c0f2dac RS |
1294 | if (server->data) |
1295 | { | |
d89d0243 KH |
1296 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1297 | server->data); | |
9c0f2dac RS |
1298 | if (cp) |
1299 | { | |
1300 | int found; | |
1301 | int data_used; | |
1302 | ||
1303 | found = server->buffer_index; | |
1304 | data_used = (cp + 2) - server->buffer - found; | |
80b2cbf2 | 1305 | |
9c0f2dac RS |
1306 | *cp = '\0'; /* terminate the string to be returned */ |
1307 | server->data -= data_used; | |
1308 | server->buffer_index += data_used; | |
1309 | ||
1310 | if (pop_debug) | |
d89d0243 KH |
1311 | /* Embedded nulls will truncate this output prematurely, |
1312 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1313 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1314 | *line = server->buffer + found; |
1315 | return (data_used - 2); | |
9c0f2dac RS |
1316 | } |
1317 | else | |
1318 | { | |
72af86bd AS |
1319 | memmove (server->buffer, server->buffer + server->buffer_index, |
1320 | server->data); | |
b6606ad8 RS |
1321 | /* Record the fact that we've searched the data already in |
1322 | the buffer for a CRLF, so that when we search below, we | |
1323 | don't have to search the same data twice. There's a "- | |
1324 | 1" here to account for the fact that the last character | |
1325 | of the data we have may be the CR of a CRLF pair, of | |
1326 | which we haven't read the second half yet, so we may have | |
1327 | to search it again when we read more data. */ | |
1328 | search_offset = server->data - 1; | |
9c0f2dac RS |
1329 | server->buffer_index = 0; |
1330 | } | |
1331 | } | |
1332 | else | |
1333 | { | |
1334 | server->buffer_index = 0; | |
1335 | } | |
1336 | ||
1337 | while (1) | |
1338 | { | |
bbcac09c RS |
1339 | /* There's a "- 1" here to leave room for the null that we put |
1340 | at the end of the read data below. We put the null there so | |
1341 | that find_crlf knows where to stop when we call it. */ | |
1342 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1343 | { |
bbcac09c RS |
1344 | server->buffer_size += GETLINE_INCR; |
1345 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1346 | if (! server->buffer) | |
9c0f2dac | 1347 | { |
bbcac09c RS |
1348 | strcpy (pop_error, "Out of memory in pop_getline"); |
1349 | pop_trash (server); | |
1350 | return (-1); | |
0ea95737 | 1351 | } |
0ea95737 | 1352 | } |
bbcac09c RS |
1353 | ret = RECV (server->file, server->buffer + server->data, |
1354 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1355 | if (ret < 0) |
1356 | { | |
1357 | strcpy (pop_error, GETLINE_ERROR); | |
1358 | strncat (pop_error, strerror (errno), | |
1359 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1360 | pop_trash (server); | |
d89d0243 | 1361 | return (-1); |
9c0f2dac RS |
1362 | } |
1363 | else if (ret == 0) | |
1364 | { | |
60b0a379 | 1365 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1366 | pop_trash (server); |
d89d0243 | 1367 | return (-1); |
9c0f2dac RS |
1368 | } |
1369 | else | |
1370 | { | |
7a481e50 | 1371 | char *cp; |
9c0f2dac | 1372 | server->data += ret; |
7a481e50 | 1373 | server->buffer[server->data] = '\0'; |
80b2cbf2 | 1374 | |
d89d0243 KH |
1375 | cp = find_crlf (server->buffer + search_offset, |
1376 | server->data - search_offset); | |
9c0f2dac RS |
1377 | if (cp) |
1378 | { | |
1379 | int data_used = (cp + 2) - server->buffer; | |
1380 | *cp = '\0'; | |
1381 | server->data -= data_used; | |
1382 | server->buffer_index = data_used; | |
1383 | ||
1384 | if (pop_debug) | |
1385 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1386 | *line = server->buffer; |
1387 | return (data_used - 2); | |
9c0f2dac | 1388 | } |
a8f44d07 RS |
1389 | /* As above, the "- 1" here is to account for the fact that |
1390 | we may have read a CR without its accompanying LF. */ | |
1391 | search_offset += ret - 1; | |
9c0f2dac RS |
1392 | } |
1393 | } | |
1394 | ||
1395 | /* NOTREACHED */ | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Function: sendline | |
1400 | * | |
1401 | * Purpose: Sends a line of text to the POP server. The line of text | |
1402 | * passed into this function should NOT have the carriage return | |
1403 | * and linefeed on the end of it. Periods at beginnings of lines | |
1404 | * will NOT be treated specially by this function. | |
1405 | * | |
1406 | * Arguments: | |
1407 | * server The server to which to send the text. | |
1408 | * line The line of text to send. | |
1409 | * | |
1410 | * Return value: Upon successful completion, a value of 0 will be | |
1411 | * returned. Otherwise, a non-zero value will be returned, and | |
1412 | * an error will be copied into pop_error. | |
1413 | * | |
1414 | * Side effects: Closes the connection on error. | |
1415 | */ | |
1416 | static int | |
873fbd0b | 1417 | sendline (popserver server, char *line) |
9c0f2dac RS |
1418 | { |
1419 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1420 | int ret; | |
ec641d50 KR |
1421 | char *buf; |
1422 | ||
1423 | /* Combine the string and the CR-LF into one buffer. Otherwise, two | |
1424 | reasonable network stack optimizations, Nagle's algorithm and | |
1425 | delayed acks, combine to delay us a fraction of a second on every | |
1426 | message we send. (Movemail writes line without \r\n, client | |
1427 | kernel sends packet, server kernel delays the ack to see if it | |
1428 | can combine it with data, movemail writes \r\n, client kernel | |
1429 | waits because it has unacked data already in its outgoing queue, | |
1430 | client kernel eventually times out and sends.) | |
1431 | ||
1432 | This can be something like 0.2s per command, which can add up | |
1433 | over a few dozen messages, and is a big chunk of the time we | |
1434 | spend fetching mail from a server close by. */ | |
1435 | buf = alloca (strlen (line) + 3); | |
1436 | strcpy (buf, line); | |
1437 | strcat (buf, "\r\n"); | |
1438 | ret = fullwrite (server->file, buf, strlen (buf)); | |
9c0f2dac RS |
1439 | |
1440 | if (ret < 0) | |
1441 | { | |
1442 | pop_trash (server); | |
1443 | strcpy (pop_error, SENDLINE_ERROR); | |
1444 | strncat (pop_error, strerror (errno), | |
1445 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1446 | return (ret); | |
1447 | } | |
1448 | ||
1449 | if (pop_debug) | |
1450 | fprintf (stderr, ">>> %s\n", line); | |
1451 | ||
1452 | return (0); | |
1453 | } | |
1454 | ||
1455 | /* | |
1456 | * Procedure: fullwrite | |
1457 | * | |
1458 | * Purpose: Just like write, but keeps trying until the entire string | |
1459 | * has been written. | |
1460 | * | |
1461 | * Return value: Same as write. Pop_error is not set. | |
1462 | */ | |
1463 | static int | |
873fbd0b | 1464 | fullwrite (int fd, char *buf, int nbytes) |
9c0f2dac RS |
1465 | { |
1466 | char *cp; | |
9d3f4cee | 1467 | int ret = 0; |
9c0f2dac RS |
1468 | |
1469 | cp = buf; | |
9d3f4cee | 1470 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1471 | { |
1472 | cp += ret; | |
1473 | nbytes -= ret; | |
1474 | } | |
1475 | ||
1476 | return (ret); | |
1477 | } | |
1478 | ||
1479 | /* | |
1480 | * Procedure getok | |
1481 | * | |
1482 | * Purpose: Reads a line from the server. If the return indicator is | |
1483 | * positive, return with a zero exit status. If not, return with | |
1484 | * a negative exit status. | |
1485 | * | |
1486 | * Arguments: | |
1487 | * server The server to read from. | |
80b2cbf2 | 1488 | * |
9c0f2dac RS |
1489 | * Returns: 0 for success, else for failure and puts error in pop_error. |
1490 | * | |
8e6208c5 | 1491 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1492 | */ |
1493 | static int | |
873fbd0b | 1494 | getok (popserver server) |
9c0f2dac RS |
1495 | { |
1496 | char *fromline; | |
1497 | ||
60b0a379 | 1498 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1499 | { |
1500 | return (-1); | |
1501 | } | |
1502 | ||
1503 | if (! strncmp (fromline, "+OK", 3)) | |
1504 | return (0); | |
1505 | else if (! strncmp (fromline, "-ERR", 4)) | |
1506 | { | |
1507 | strncpy (pop_error, fromline, ERROR_MAX); | |
1508 | pop_error[ERROR_MAX-1] = '\0'; | |
1509 | return (-1); | |
1510 | } | |
1511 | else | |
1512 | { | |
1513 | strcpy (pop_error, | |
1514 | "Unexpected response from server; expecting +OK or -ERR"); | |
1515 | pop_trash (server); | |
1516 | return (-1); | |
1517 | } | |
80b2cbf2 | 1518 | } |
9c0f2dac RS |
1519 | |
1520 | #if 0 | |
1521 | /* | |
1522 | * Function: gettermination | |
1523 | * | |
1524 | * Purpose: Gets the next line and verifies that it is a termination | |
1525 | * line (nothing but a dot). | |
1526 | * | |
1527 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1528 | * | |
1529 | * Side effects: Closes the connection on error. | |
1530 | */ | |
1531 | static int | |
1532 | gettermination (server) | |
1533 | popserver server; | |
1534 | { | |
1535 | char *fromserver; | |
1536 | ||
60b0a379 | 1537 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1538 | return (-1); |
1539 | ||
1540 | if (strcmp (fromserver, ".")) | |
1541 | { | |
1542 | strcpy (pop_error, | |
1543 | "Unexpected response from server in gettermination"); | |
1544 | pop_trash (server); | |
1545 | return (-1); | |
1546 | } | |
1547 | ||
1548 | return (0); | |
1549 | } | |
1550 | #endif | |
1551 | ||
1552 | /* | |
1553 | * Function pop_close | |
1554 | * | |
1555 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1556 | * preserve any changes that were made and a "QUIT" command to | |
1557 | * try to get the server to quit, but ignoring any responses that | |
1558 | * are received. | |
1559 | * | |
8e6208c5 | 1560 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1561 | * Changes made to the maildrop since the session was started (or |
1562 | * since the last pop_reset) may be lost. | |
1563 | */ | |
80b2cbf2 | 1564 | void |
873fbd0b | 1565 | pop_close (popserver server) |
9c0f2dac RS |
1566 | { |
1567 | pop_trash (server); | |
1568 | free ((char *) server); | |
1569 | ||
1570 | return; | |
1571 | } | |
1572 | ||
1573 | /* | |
1574 | * Function: pop_trash | |
1575 | * | |
1576 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
4d90eee4 | 1577 | * memory associated with the server. It is valid to call |
9c0f2dac RS |
1578 | * pop_close or pop_quit after this function has been called. |
1579 | */ | |
1580 | static void | |
873fbd0b | 1581 | pop_trash (popserver server) |
9c0f2dac RS |
1582 | { |
1583 | if (server->file >= 0) | |
1584 | { | |
c2668a61 RS |
1585 | /* avoid recursion; sendline can call pop_trash */ |
1586 | if (server->trash_started) | |
1587 | return; | |
1588 | server->trash_started = 1; | |
de5c39cf | 1589 | |
9c0f2dac RS |
1590 | sendline (server, "RSET"); |
1591 | sendline (server, "QUIT"); | |
1592 | ||
de5c39cf | 1593 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1594 | server->file = -1; |
1595 | if (server->buffer) | |
1596 | { | |
1597 | free (server->buffer); | |
1598 | server->buffer = 0; | |
1599 | } | |
1600 | } | |
c2668a61 RS |
1601 | |
1602 | #ifdef WINDOWSNT | |
1603 | if (have_winsock) | |
1604 | WSACleanup (); | |
1605 | #endif | |
9c0f2dac RS |
1606 | } |
1607 | ||
d89d0243 KH |
1608 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1609 | embedded nulls and has LEN characters in it not including the final | |
1610 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1611 | |
1612 | static char * | |
873fbd0b | 1613 | find_crlf (char *in_string, int len) |
9c0f2dac | 1614 | { |
d89d0243 | 1615 | while (len--) |
9c0f2dac | 1616 | { |
d89d0243 | 1617 | if (*in_string == '\r') |
8148baf9 RS |
1618 | { |
1619 | if (*++in_string == '\n') | |
1620 | return (in_string - 1); | |
1621 | } | |
1622 | else | |
1623 | in_string++; | |
9c0f2dac | 1624 | } |
d89d0243 | 1625 | return (0); |
9c0f2dac RS |
1626 | } |
1627 | ||
1628 | #endif /* MAIL_USE_POP */ | |
ab5796a9 MB |
1629 | |
1630 | /* arch-tag: ceb37041-b7ad-49a8-a63d-286618b8367d | |
1631 | (do not change this comment) */ |