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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
95df8112 GM |
2 | |
3 | Copyright (C) 1991, 1993, 1996-1997, 1999, 2001-2011 | |
4 | Free Software 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 | |
8148baf9 | 24 | #ifdef HAVE_CONFIG_H |
2f8fe2f4 | 25 | #include <config.h> |
8148baf9 RS |
26 | #else |
27 | #define MAIL_USE_POP | |
28 | #endif | |
c9c3d8f6 | 29 | |
8148baf9 RS |
30 | #ifdef MAIL_USE_POP |
31 | ||
9c0f2dac | 32 | #include <sys/types.h> |
c2668a61 RS |
33 | #ifdef WINDOWSNT |
34 | #include "ntlib.h" | |
35 | #include <winsock.h> | |
36 | #undef SOCKET_ERROR | |
de5c39cf RS |
37 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
38 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
39 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 40 | #else |
9c0f2dac RS |
41 | #include <netinet/in.h> |
42 | #include <sys/socket.h> | |
de5c39cf RS |
43 | #define RECV(s,buf,len,flags) read(s,buf,len) |
44 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
45 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 46 | #endif |
9c0f2dac | 47 | #include <pop.h> |
625ad89f | 48 | |
9c0f2dac RS |
49 | #ifdef sun |
50 | #include <malloc.h> | |
8148baf9 | 51 | #endif /* sun */ |
625ad89f | 52 | |
9c0f2dac RS |
53 | #ifdef HESIOD |
54 | #include <hesiod.h> | |
55 | /* | |
56 | * It really shouldn't be necessary to put this declaration here, but | |
57 | * the version of hesiod.h that Athena has installed in release 7.2 | |
58 | * doesn't declare this function; I don't know if the 7.3 version of | |
59 | * hesiod.h does. | |
60 | */ | |
61 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
62 | #endif | |
625ad89f | 63 | |
9c0f2dac | 64 | #include <pwd.h> |
9c0f2dac RS |
65 | #include <netdb.h> |
66 | #include <errno.h> | |
67 | #include <stdio.h> | |
a27738b6 RS |
68 | #ifdef STDC_HEADERS |
69 | #include <string.h> | |
020d3015 | 70 | #endif |
020d3015 | 71 | #include <unistd.h> |
625ad89f | 72 | |
9c0f2dac | 73 | #ifdef KERBEROS |
a27738b6 RS |
74 | # ifdef HAVE_KRB5_H |
75 | # include <krb5.h> | |
76 | # endif | |
a27738b6 RS |
77 | # ifdef HAVE_KRB_H |
78 | # include <krb.h> | |
79 | # else | |
80 | # ifdef HAVE_KERBEROSIV_KRB_H | |
81 | # include <kerberosIV/krb.h> | |
82 | # else | |
83 | # ifdef HAVE_KERBEROS_KRB_H | |
84 | # include <kerberos/krb.h> | |
85 | # endif | |
86 | # endif | |
87 | # endif | |
88 | # ifdef HAVE_COM_ERR_H | |
89 | # include <com_err.h> | |
90 | # endif | |
8148baf9 | 91 | #endif /* KERBEROS */ |
9c0f2dac | 92 | |
8148baf9 | 93 | #ifdef KERBEROS |
a27738b6 | 94 | #ifndef KERBEROS5 |
9c0f2dac | 95 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
96 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
97 | struct sockaddr_in *, struct sockaddr_in *, | |
98 | char * */); | |
9c0f2dac | 99 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 100 | #endif /* ! KERBEROS5 */ |
8148baf9 | 101 | #endif /* KERBEROS */ |
9c0f2dac | 102 | |
c2668a61 | 103 | #ifndef WINDOWSNT |
8148baf9 | 104 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
105 | extern int h_errno; |
106 | #endif | |
c2668a61 | 107 | #endif |
9c0f2dac | 108 | |
f57e2426 J |
109 | static int socket_connection (char *, int); |
110 | static int pop_getline (popserver, char **); | |
988e88ab | 111 | static int sendline (popserver, const char *); |
f57e2426 J |
112 | static int fullwrite (int, char *, int); |
113 | static int getok (popserver); | |
9c0f2dac | 114 | #if 0 |
f57e2426 | 115 | static int gettermination (popserver); |
9c0f2dac | 116 | #endif |
f57e2426 J |
117 | static void pop_trash (popserver); |
118 | static char *find_crlf (char *, int); | |
7a481e50 | 119 | |
5bf244f1 | 120 | #define ERROR_MAX 160 /* a pretty arbitrary size, but needs |
a47bf648 DL |
121 | to be bigger than the original |
122 | value of 80 */ | |
9c0f2dac | 123 | #define POP_PORT 110 |
c2668a61 | 124 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ |
9c0f2dac | 125 | #ifdef KERBEROS |
0d7fdc0e | 126 | #define KPOP_PORT 1109 |
81264b38 | 127 | #define KPOP_SERVICE "kpop" /* never used: look for 20060515 to see why */ |
9c0f2dac | 128 | #endif |
9c0f2dac RS |
129 | |
130 | char pop_error[ERROR_MAX]; | |
131 | int pop_debug = 0; | |
132 | ||
133 | #ifndef min | |
134 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
135 | #endif | |
136 | ||
137 | /* | |
138 | * Function: pop_open (char *host, char *username, char *password, | |
139 | * int flags) | |
140 | * | |
141 | * Purpose: Establishes a connection with a post-office server, and | |
142 | * completes the authorization portion of the session. | |
143 | * | |
144 | * Arguments: | |
145 | * host The server host with which the connection should be | |
146 | * established. Optional. If omitted, internal | |
147 | * heuristics will be used to determine the server host, | |
148 | * if possible. | |
149 | * username | |
150 | * The username of the mail-drop to access. Optional. | |
151 | * If omitted, internal heuristics will be used to | |
152 | * determine the username, if possible. | |
153 | * password | |
154 | * The password to use for authorization. If omitted, | |
155 | * internal heuristics will be used to determine the | |
156 | * password, if possible. | |
157 | * flags A bit mask containing flags controlling certain | |
158 | * functions of the routine. Valid flags are defined in | |
159 | * the file pop.h | |
160 | * | |
161 | * Return value: Upon successful establishment of a connection, a | |
162 | * non-null popserver will be returned. Otherwise, null will be | |
163 | * returned, and the string variable pop_error will contain an | |
164 | * explanation of the error. | |
165 | */ | |
166 | popserver | |
873fbd0b | 167 | pop_open (char *host, char *username, char *password, int flags) |
9c0f2dac RS |
168 | { |
169 | int sock; | |
170 | popserver server; | |
171 | ||
172 | /* Determine the user name */ | |
173 | if (! username) | |
174 | { | |
175 | username = getenv ("USER"); | |
176 | if (! (username && *username)) | |
177 | { | |
178 | username = getlogin (); | |
179 | if (! (username && *username)) | |
180 | { | |
181 | struct passwd *passwd; | |
182 | passwd = getpwuid (getuid ()); | |
183 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
184 | { | |
185 | username = passwd->pw_name; | |
186 | } | |
187 | else | |
188 | { | |
189 | strcpy (pop_error, "Could not determine username"); | |
190 | return (0); | |
191 | } | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | /* | |
197 | * Determine the mail host. | |
198 | */ | |
199 | ||
200 | if (! host) | |
201 | { | |
202 | host = getenv ("MAILHOST"); | |
203 | } | |
204 | ||
205 | #ifdef HESIOD | |
206 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
207 | { | |
208 | struct hes_postoffice *office; | |
209 | office = hes_getmailhost (username); | |
210 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
211 | && office->po_name && *office->po_name && office->po_host | |
212 | && *office->po_host) | |
213 | { | |
214 | host = office->po_host; | |
215 | username = office->po_name; | |
216 | } | |
217 | } | |
218 | #endif | |
219 | ||
220 | #ifdef MAILHOST | |
221 | if (! host) | |
222 | { | |
223 | host = MAILHOST; | |
224 | } | |
225 | #endif | |
226 | ||
227 | if (! host) | |
228 | { | |
229 | strcpy (pop_error, "Could not determine POP server"); | |
230 | return (0); | |
231 | } | |
232 | ||
233 | /* Determine the password */ | |
bbcac09c RS |
234 | #ifdef KERBEROS |
235 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
9c0f2dac | 236 | #else |
bbcac09c | 237 | #define DONT_NEED_PASSWORD 0 |
9c0f2dac | 238 | #endif |
177c0ea7 | 239 | |
9c0f2dac RS |
240 | if ((! password) && (! DONT_NEED_PASSWORD)) |
241 | { | |
242 | if (! (flags & POP_NO_GETPASS)) | |
243 | { | |
244 | password = getpass ("Enter POP password:"); | |
245 | } | |
246 | if (! password) | |
247 | { | |
248 | strcpy (pop_error, "Could not determine POP password"); | |
249 | return (0); | |
250 | } | |
251 | } | |
81264b38 | 252 | if (password) /* always true, detected 20060515 */ |
bbcac09c | 253 | flags |= POP_NO_KERBEROS; |
9c0f2dac | 254 | else |
81264b38 FP |
255 | password = username; /* dead code, detected 20060515 */ |
256 | /** "kpop" service is never used: look for 20060515 to see why **/ | |
9c0f2dac RS |
257 | |
258 | sock = socket_connection (host, flags); | |
259 | if (sock == -1) | |
260 | return (0); | |
261 | ||
262 | server = (popserver) malloc (sizeof (struct _popserver)); | |
263 | if (! server) | |
264 | { | |
265 | strcpy (pop_error, "Out of memory in pop_open"); | |
266 | return (0); | |
267 | } | |
268 | server->buffer = (char *) malloc (GETLINE_MIN); | |
269 | if (! server->buffer) | |
270 | { | |
271 | strcpy (pop_error, "Out of memory in pop_open"); | |
272 | free ((char *) server); | |
273 | return (0); | |
274 | } | |
80b2cbf2 | 275 | |
9c0f2dac RS |
276 | server->file = sock; |
277 | server->data = 0; | |
278 | server->buffer_index = 0; | |
279 | server->buffer_size = GETLINE_MIN; | |
280 | server->in_multi = 0; | |
c2668a61 | 281 | server->trash_started = 0; |
9c0f2dac RS |
282 | |
283 | if (getok (server)) | |
284 | return (0); | |
285 | ||
286 | /* | |
287 | * I really shouldn't use the pop_error variable like this, but.... | |
288 | */ | |
289 | if (strlen (username) > ERROR_MAX - 6) | |
290 | { | |
291 | pop_close (server); | |
292 | strcpy (pop_error, | |
293 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
294 | return (0); | |
295 | } | |
296 | sprintf (pop_error, "USER %s", username); | |
297 | ||
298 | if (sendline (server, pop_error) || getok (server)) | |
299 | { | |
300 | return (0); | |
301 | } | |
302 | ||
303 | if (strlen (password) > ERROR_MAX - 6) | |
304 | { | |
305 | pop_close (server); | |
306 | strcpy (pop_error, | |
307 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
308 | return (0); | |
309 | } | |
310 | sprintf (pop_error, "PASS %s", password); | |
311 | ||
312 | if (sendline (server, pop_error) || getok (server)) | |
313 | { | |
314 | return (0); | |
315 | } | |
316 | ||
317 | return (server); | |
318 | } | |
319 | ||
320 | /* | |
321 | * Function: pop_stat | |
322 | * | |
323 | * Purpose: Issue the STAT command to the server and return (in the | |
324 | * value parameters) the number of messages in the maildrop and | |
325 | * the total size of the maildrop. | |
326 | * | |
327 | * Return value: 0 on success, or non-zero with an error in pop_error | |
328 | * in failure. | |
329 | * | |
330 | * Side effects: On failure, may make further operations on the | |
331 | * connection impossible. | |
332 | */ | |
333 | int | |
873fbd0b | 334 | pop_stat (popserver server, int *count, int *size) |
9c0f2dac RS |
335 | { |
336 | char *fromserver; | |
0b074993 | 337 | char *end_ptr; |
9c0f2dac RS |
338 | |
339 | if (server->in_multi) | |
340 | { | |
341 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
342 | return (-1); | |
343 | } | |
80b2cbf2 | 344 | |
60b0a379 | 345 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
346 | return (-1); |
347 | ||
348 | if (strncmp (fromserver, "+OK ", 4)) | |
349 | { | |
350 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
351 | { | |
352 | strncpy (pop_error, fromserver, ERROR_MAX); | |
353 | } | |
354 | else | |
355 | { | |
356 | strcpy (pop_error, | |
357 | "Unexpected response from POP server in pop_stat"); | |
358 | pop_trash (server); | |
359 | } | |
360 | return (-1); | |
361 | } | |
362 | ||
0b074993 CY |
363 | errno = 0; |
364 | *count = strtol (&fromserver[4], &end_ptr, 10); | |
365 | /* Check validity of string-to-integer conversion. */ | |
59a431d6 | 366 | if (fromserver + 4 == end_ptr || *end_ptr != ' ' || errno) |
0b074993 CY |
367 | { |
368 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
369 | pop_trash (server); | |
370 | return (-1); | |
371 | } | |
80b2cbf2 | 372 | |
59a431d6 | 373 | fromserver = end_ptr; |
9c0f2dac | 374 | |
0b074993 CY |
375 | errno = 0; |
376 | *size = strtol (fromserver + 1, &end_ptr, 10); | |
59a431d6 | 377 | if (fromserver + 1 == end_ptr || errno) |
0b074993 CY |
378 | { |
379 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
380 | pop_trash (server); | |
381 | return (-1); | |
382 | } | |
9c0f2dac RS |
383 | |
384 | return (0); | |
385 | } | |
386 | ||
387 | /* | |
388 | * Function: pop_list | |
389 | * | |
390 | * Purpose: Performs the POP "list" command and returns (in value | |
391 | * parameters) two malloc'd zero-terminated arrays -- one of | |
392 | * message IDs, and a parallel one of sizes. | |
393 | * | |
394 | * Arguments: | |
395 | * server The pop connection to talk to. | |
396 | * message The number of the one message about which to get | |
397 | * information, or 0 to get information about all | |
398 | * messages. | |
399 | * | |
400 | * Return value: 0 on success, non-zero with error in pop_error on | |
401 | * failure. | |
402 | * | |
403 | * Side effects: On failure, may make further operations on the | |
404 | * connection impossible. | |
405 | */ | |
406 | int | |
873fbd0b | 407 | pop_list (popserver server, int message, int **IDs, int **sizes) |
9c0f2dac RS |
408 | { |
409 | int how_many, i; | |
410 | char *fromserver; | |
411 | ||
412 | if (server->in_multi) | |
413 | { | |
414 | strcpy (pop_error, "In multi-line query in pop_list"); | |
415 | return (-1); | |
416 | } | |
417 | ||
418 | if (message) | |
419 | how_many = 1; | |
420 | else | |
421 | { | |
422 | int count, size; | |
423 | if (pop_stat (server, &count, &size)) | |
424 | return (-1); | |
425 | how_many = count; | |
426 | } | |
427 | ||
428 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
429 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
430 | if (! (*IDs && *sizes)) | |
431 | { | |
432 | strcpy (pop_error, "Out of memory in pop_list"); | |
433 | return (-1); | |
434 | } | |
435 | ||
436 | if (message) | |
437 | { | |
438 | sprintf (pop_error, "LIST %d", message); | |
439 | if (sendline (server, pop_error)) | |
440 | { | |
441 | free ((char *) *IDs); | |
442 | free ((char *) *sizes); | |
443 | return (-1); | |
444 | } | |
60b0a379 | 445 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
446 | { |
447 | free ((char *) *IDs); | |
448 | free ((char *) *sizes); | |
449 | return (-1); | |
450 | } | |
451 | if (strncmp (fromserver, "+OK ", 4)) | |
452 | { | |
453 | if (! strncmp (fromserver, "-ERR", 4)) | |
454 | strncpy (pop_error, fromserver, ERROR_MAX); | |
455 | else | |
456 | { | |
457 | strcpy (pop_error, | |
458 | "Unexpected response from server in pop_list"); | |
459 | pop_trash (server); | |
460 | } | |
461 | free ((char *) *IDs); | |
462 | free ((char *) *sizes); | |
463 | return (-1); | |
464 | } | |
465 | (*IDs)[0] = atoi (&fromserver[4]); | |
8966b757 | 466 | fromserver = strchr (&fromserver[4], ' '); |
9c0f2dac RS |
467 | if (! fromserver) |
468 | { | |
469 | strcpy (pop_error, | |
470 | "Badly formatted response from server in pop_list"); | |
471 | pop_trash (server); | |
472 | free ((char *) *IDs); | |
473 | free ((char *) *sizes); | |
474 | return (-1); | |
475 | } | |
476 | (*sizes)[0] = atoi (fromserver); | |
477 | (*IDs)[1] = (*sizes)[1] = 0; | |
478 | return (0); | |
479 | } | |
480 | else | |
481 | { | |
482 | if (pop_multi_first (server, "LIST", &fromserver)) | |
483 | { | |
484 | free ((char *) *IDs); | |
485 | free ((char *) *sizes); | |
486 | return (-1); | |
487 | } | |
488 | for (i = 0; i < how_many; i++) | |
489 | { | |
d89d0243 | 490 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
491 | { |
492 | free ((char *) *IDs); | |
493 | free ((char *) *sizes); | |
494 | return (-1); | |
495 | } | |
496 | (*IDs)[i] = atoi (fromserver); | |
8966b757 | 497 | fromserver = strchr (fromserver, ' '); |
9c0f2dac RS |
498 | if (! fromserver) |
499 | { | |
500 | strcpy (pop_error, | |
501 | "Badly formatted response from server in pop_list"); | |
502 | free ((char *) *IDs); | |
503 | free ((char *) *sizes); | |
504 | pop_trash (server); | |
505 | return (-1); | |
506 | } | |
507 | (*sizes)[i] = atoi (fromserver); | |
508 | } | |
d89d0243 | 509 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
510 | { |
511 | free ((char *) *IDs); | |
512 | free ((char *) *sizes); | |
513 | return (-1); | |
514 | } | |
515 | else if (fromserver) | |
516 | { | |
517 | strcpy (pop_error, | |
518 | "Too many response lines from server in pop_list"); | |
519 | free ((char *) *IDs); | |
520 | free ((char *) *sizes); | |
521 | return (-1); | |
522 | } | |
523 | (*IDs)[i] = (*sizes)[i] = 0; | |
524 | return (0); | |
525 | } | |
526 | } | |
527 | ||
528 | /* | |
529 | * Function: pop_retrieve | |
530 | * | |
531 | * Purpose: Retrieve a specified message from the maildrop. | |
532 | * | |
533 | * Arguments: | |
534 | * server The server to retrieve from. | |
535 | * message The message number to retrieve. | |
536 | * markfrom | |
537 | * If true, then mark the string "From " at the beginning | |
538 | * of lines with '>'. | |
d89d0243 KH |
539 | * msg_buf Output parameter to which a buffer containing the |
540 | * message is assigned. | |
177c0ea7 | 541 | * |
d89d0243 KH |
542 | * Return value: The number of bytes in msg_buf, which may contain |
543 | * embedded nulls, not including its final null, or -1 on error | |
544 | * with pop_error set. | |
9c0f2dac RS |
545 | * |
546 | * Side effects: May kill connection on error. | |
547 | */ | |
d89d0243 | 548 | int |
873fbd0b | 549 | pop_retrieve (popserver server, int message, int markfrom, char **msg_buf) |
9c0f2dac RS |
550 | { |
551 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
552 | char *ptr, *fromserver; | |
553 | int ret; | |
554 | ||
555 | if (server->in_multi) | |
556 | { | |
557 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 558 | return (-1); |
9c0f2dac RS |
559 | } |
560 | ||
561 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 562 | return (-1); |
9c0f2dac RS |
563 | |
564 | if (pop_retrieve_first (server, message, &fromserver)) | |
565 | { | |
d89d0243 | 566 | return (-1); |
9c0f2dac RS |
567 | } |
568 | ||
569 | /* | |
570 | * The "5" below is an arbitrary constant -- I assume that if | |
571 | * there are "From" lines in the text to be marked, there | |
572 | * probably won't be more than 5 of them. If there are, I | |
573 | * allocate more space for them below. | |
574 | */ | |
575 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 576 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
577 | free ((char *) IDs); |
578 | free ((char *) sizes); | |
579 | ||
580 | if (! ptr) | |
581 | { | |
582 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
583 | pop_retrieve_flush (server); | |
d89d0243 | 584 | return (-1); |
9c0f2dac RS |
585 | } |
586 | ||
d89d0243 | 587 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 588 | { |
9c0f2dac RS |
589 | if (! fromserver) |
590 | { | |
591 | ptr[cp] = '\0'; | |
d89d0243 KH |
592 | *msg_buf = ptr; |
593 | return (cp); | |
9c0f2dac RS |
594 | } |
595 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
596 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
597 | fromserver[4] == ' ') | |
598 | { | |
599 | if (++fromcount == 5) | |
600 | { | |
601 | bufsize += 5; | |
7d665945 | 602 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
603 | if (! ptr) |
604 | { | |
605 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
606 | pop_retrieve_flush (server); | |
d89d0243 | 607 | return (-1); |
9c0f2dac RS |
608 | } |
609 | fromcount = 0; | |
610 | } | |
611 | ptr[cp++] = '>'; | |
612 | } | |
72af86bd | 613 | memcpy (&ptr[cp], fromserver, ret); |
d89d0243 | 614 | cp += ret; |
9c0f2dac RS |
615 | ptr[cp++] = '\n'; |
616 | } | |
617 | ||
d89d0243 KH |
618 | free (ptr); |
619 | return (-1); | |
177c0ea7 | 620 | } |
9c0f2dac RS |
621 | |
622 | int | |
873fbd0b | 623 | pop_retrieve_first (popserver server, int message, char **response) |
9c0f2dac RS |
624 | { |
625 | sprintf (pop_error, "RETR %d", message); | |
626 | return (pop_multi_first (server, pop_error, response)); | |
627 | } | |
628 | ||
d89d0243 KH |
629 | /* |
630 | Returns a negative number on error, 0 to indicate that the data has | |
631 | all been read (i.e., the server has returned a "." termination | |
632 | line), or a positive number indicating the number of bytes in the | |
633 | returned buffer (which is null-terminated and may contain embedded | |
634 | nulls, but the returned bytecount doesn't include the final null). | |
635 | */ | |
636 | ||
9c0f2dac | 637 | int |
873fbd0b | 638 | pop_retrieve_next (popserver server, char **line) |
9c0f2dac RS |
639 | { |
640 | return (pop_multi_next (server, line)); | |
641 | } | |
642 | ||
643 | int | |
873fbd0b | 644 | pop_retrieve_flush (popserver server) |
9c0f2dac RS |
645 | { |
646 | return (pop_multi_flush (server)); | |
647 | } | |
648 | ||
649 | int | |
873fbd0b | 650 | pop_top_first (popserver server, int message, int lines, char **response) |
9c0f2dac RS |
651 | { |
652 | sprintf (pop_error, "TOP %d %d", message, lines); | |
653 | return (pop_multi_first (server, pop_error, response)); | |
654 | } | |
655 | ||
d89d0243 KH |
656 | /* |
657 | Returns a negative number on error, 0 to indicate that the data has | |
658 | all been read (i.e., the server has returned a "." termination | |
659 | line), or a positive number indicating the number of bytes in the | |
660 | returned buffer (which is null-terminated and may contain embedded | |
661 | nulls, but the returned bytecount doesn't include the final null). | |
662 | */ | |
663 | ||
9c0f2dac | 664 | int |
873fbd0b | 665 | pop_top_next (popserver server, char **line) |
9c0f2dac RS |
666 | { |
667 | return (pop_multi_next (server, line)); | |
668 | } | |
669 | ||
670 | int | |
873fbd0b | 671 | pop_top_flush (popserver server) |
9c0f2dac RS |
672 | { |
673 | return (pop_multi_flush (server)); | |
674 | } | |
675 | ||
676 | int | |
988e88ab | 677 | pop_multi_first (popserver server, const char *command, char **response) |
9c0f2dac RS |
678 | { |
679 | if (server->in_multi) | |
680 | { | |
681 | strcpy (pop_error, | |
682 | "Already in multi-line query in pop_multi_first"); | |
683 | return (-1); | |
684 | } | |
685 | ||
60b0a379 | 686 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
687 | { |
688 | return (-1); | |
689 | } | |
690 | ||
691 | if (0 == strncmp (*response, "-ERR", 4)) | |
692 | { | |
693 | strncpy (pop_error, *response, ERROR_MAX); | |
694 | return (-1); | |
695 | } | |
696 | else if (0 == strncmp (*response, "+OK", 3)) | |
697 | { | |
698 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
699 | server->in_multi = 1; | |
700 | return (0); | |
701 | } | |
702 | else | |
703 | { | |
704 | strcpy (pop_error, | |
705 | "Unexpected response from server in pop_multi_first"); | |
706 | return (-1); | |
707 | } | |
708 | } | |
709 | ||
d89d0243 KH |
710 | /* |
711 | Read the next line of data from SERVER and place a pointer to it | |
712 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
713 | (i.e., the server has returned a line containing only "."), or a | |
714 | positive number indicating the number of bytes in the LINE buffer | |
715 | (not including the final null). The data in that buffer may contain | |
716 | embedded nulls, but does not contain the final CRLF. When returning | |
717 | 0, LINE is set to null. */ | |
718 | ||
9c0f2dac | 719 | int |
873fbd0b | 720 | pop_multi_next (popserver server, char **line) |
9c0f2dac RS |
721 | { |
722 | char *fromserver; | |
d89d0243 | 723 | int ret; |
9c0f2dac RS |
724 | |
725 | if (! server->in_multi) | |
726 | { | |
727 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
728 | return (-1); | |
729 | } | |
730 | ||
60b0a379 | 731 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
732 | { |
733 | return (-1); | |
734 | } | |
735 | ||
736 | if (fromserver[0] == '.') | |
737 | { | |
738 | if (! fromserver[1]) | |
739 | { | |
740 | *line = 0; | |
741 | server->in_multi = 0; | |
742 | return (0); | |
743 | } | |
744 | else | |
745 | { | |
746 | *line = fromserver + 1; | |
d89d0243 | 747 | return (ret - 1); |
9c0f2dac RS |
748 | } |
749 | } | |
750 | else | |
751 | { | |
752 | *line = fromserver; | |
d89d0243 | 753 | return (ret); |
9c0f2dac RS |
754 | } |
755 | } | |
756 | ||
757 | int | |
873fbd0b | 758 | pop_multi_flush (popserver server) |
9c0f2dac RS |
759 | { |
760 | char *line; | |
d89d0243 | 761 | int ret; |
9c0f2dac RS |
762 | |
763 | if (! server->in_multi) | |
764 | { | |
765 | return (0); | |
766 | } | |
767 | ||
d89d0243 | 768 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 769 | { |
d89d0243 KH |
770 | if (ret < 0) |
771 | return (-1); | |
9c0f2dac RS |
772 | } |
773 | ||
d89d0243 | 774 | return (0); |
9c0f2dac RS |
775 | } |
776 | ||
777 | /* Function: pop_delete | |
778 | * | |
779 | * Purpose: Delete a specified message. | |
780 | * | |
781 | * Arguments: | |
782 | * server Server from which to delete the message. | |
783 | * message Message to delete. | |
784 | * | |
785 | * Return value: 0 on success, non-zero with error in pop_error | |
786 | * otherwise. | |
787 | */ | |
788 | int | |
873fbd0b | 789 | pop_delete (popserver server, int message) |
9c0f2dac RS |
790 | { |
791 | if (server->in_multi) | |
792 | { | |
793 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
794 | return (-1); | |
795 | } | |
796 | ||
797 | sprintf (pop_error, "DELE %d", message); | |
798 | ||
799 | if (sendline (server, pop_error) || getok (server)) | |
800 | return (-1); | |
801 | ||
802 | return (0); | |
803 | } | |
804 | ||
805 | /* | |
806 | * Function: pop_noop | |
807 | * | |
808 | * Purpose: Send a noop command to the server. | |
809 | * | |
810 | * Argument: | |
811 | * server The server to send to. | |
812 | * | |
813 | * Return value: 0 on success, non-zero with error in pop_error | |
814 | * otherwise. | |
815 | * | |
816 | * Side effects: Closes connection on error. | |
817 | */ | |
818 | int | |
873fbd0b | 819 | pop_noop (popserver server) |
9c0f2dac RS |
820 | { |
821 | if (server->in_multi) | |
822 | { | |
823 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
824 | return (-1); | |
825 | } | |
826 | ||
827 | if (sendline (server, "NOOP") || getok (server)) | |
828 | return (-1); | |
829 | ||
830 | return (0); | |
831 | } | |
832 | ||
833 | /* | |
834 | * Function: pop_last | |
835 | * | |
836 | * Purpose: Find out the highest seen message from the server. | |
837 | * | |
838 | * Arguments: | |
839 | * server The server. | |
840 | * | |
841 | * Return value: If successful, the highest seen message, which is | |
842 | * greater than or equal to 0. Otherwise, a negative number with | |
843 | * the error explained in pop_error. | |
844 | * | |
845 | * Side effects: Closes the connection on error. | |
846 | */ | |
847 | int | |
873fbd0b | 848 | pop_last (popserver server) |
9c0f2dac RS |
849 | { |
850 | char *fromserver; | |
80b2cbf2 | 851 | |
9c0f2dac RS |
852 | if (server->in_multi) |
853 | { | |
854 | strcpy (pop_error, "In multi-line query in pop_last"); | |
855 | return (-1); | |
856 | } | |
857 | ||
858 | if (sendline (server, "LAST")) | |
859 | return (-1); | |
860 | ||
60b0a379 | 861 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
862 | return (-1); |
863 | ||
864 | if (! strncmp (fromserver, "-ERR", 4)) | |
865 | { | |
866 | strncpy (pop_error, fromserver, ERROR_MAX); | |
867 | return (-1); | |
868 | } | |
869 | else if (strncmp (fromserver, "+OK ", 4)) | |
870 | { | |
871 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
872 | pop_trash (server); | |
873 | return (-1); | |
874 | } | |
875 | else | |
876 | { | |
0b074993 CY |
877 | char *end_ptr; |
878 | int count; | |
879 | errno = 0; | |
880 | count = strtol (&fromserver[4], &end_ptr, 10); | |
59a431d6 | 881 | if (fromserver + 4 == end_ptr || errno) |
0b074993 CY |
882 | { |
883 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
884 | pop_trash (server); | |
885 | return (-1); | |
886 | } | |
887 | return count; | |
9c0f2dac RS |
888 | } |
889 | } | |
890 | ||
891 | /* | |
892 | * Function: pop_reset | |
893 | * | |
894 | * Purpose: Reset the server to its initial connect state | |
895 | * | |
896 | * Arguments: | |
897 | * server The server. | |
898 | * | |
899 | * Return value: 0 for success, non-0 with error in pop_error | |
900 | * otherwise. | |
901 | * | |
902 | * Side effects: Closes the connection on error. | |
903 | */ | |
904 | int | |
873fbd0b | 905 | pop_reset (popserver server) |
9c0f2dac RS |
906 | { |
907 | if (pop_retrieve_flush (server)) | |
908 | { | |
909 | return (-1); | |
910 | } | |
911 | ||
912 | if (sendline (server, "RSET") || getok (server)) | |
913 | return (-1); | |
914 | ||
915 | return (0); | |
916 | } | |
917 | ||
918 | /* | |
919 | * Function: pop_quit | |
920 | * | |
921 | * Purpose: Quit the connection to the server, | |
922 | * | |
923 | * Arguments: | |
924 | * server The server to quit. | |
925 | * | |
926 | * Return value: 0 for success, non-zero otherwise with error in | |
927 | * pop_error. | |
928 | * | |
8e6208c5 | 929 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
930 | * function is called, even if an error occurs. |
931 | */ | |
932 | int | |
873fbd0b | 933 | pop_quit (popserver server) |
9c0f2dac RS |
934 | { |
935 | int ret = 0; | |
936 | ||
937 | if (server->file >= 0) | |
938 | { | |
939 | if (pop_retrieve_flush (server)) | |
940 | { | |
941 | ret = -1; | |
942 | } | |
943 | ||
944 | if (sendline (server, "QUIT") || getok (server)) | |
945 | { | |
946 | ret = -1; | |
947 | } | |
948 | ||
949 | close (server->file); | |
950 | } | |
951 | ||
c2cd06e6 | 952 | free (server->buffer); |
9c0f2dac RS |
953 | free ((char *) server); |
954 | ||
955 | return (ret); | |
956 | } | |
957 | ||
c2668a61 RS |
958 | #ifdef WINDOWSNT |
959 | static int have_winsock = 0; | |
960 | #endif | |
961 | ||
9c0f2dac RS |
962 | /* |
963 | * Function: socket_connection | |
964 | * | |
965 | * Purpose: Opens the network connection with the mail host, without | |
966 | * doing any sort of I/O with it or anything. | |
967 | * | |
968 | * Arguments: | |
969 | * host The host to which to connect. | |
970 | * flags Option flags. | |
80b2cbf2 | 971 | * |
9c0f2dac RS |
972 | * Return value: A file descriptor indicating the connection, or -1 |
973 | * indicating failure, in which case an error has been copied | |
974 | * into pop_error. | |
975 | */ | |
976 | static int | |
873fbd0b | 977 | socket_connection (char *host, int flags) |
9c0f2dac | 978 | { |
33a2a872 JD |
979 | #ifdef HAVE_GETADDRINFO |
980 | struct addrinfo *res, *it; | |
981 | struct addrinfo hints; | |
982 | int ret; | |
983 | #else /* !HAVE_GETADDRINFO */ | |
9c0f2dac | 984 | struct hostent *hostent; |
33a2a872 | 985 | #endif |
9c0f2dac RS |
986 | struct servent *servent; |
987 | struct sockaddr_in addr; | |
988 | char found_port = 0; | |
988e88ab | 989 | const char *service; |
9c0f2dac | 990 | int sock; |
ee15f312 | 991 | char *realhost; |
9c0f2dac | 992 | #ifdef KERBEROS |
a27738b6 | 993 | #ifdef KERBEROS5 |
9c0f2dac | 994 | krb5_error_code rem; |
a27738b6 RS |
995 | krb5_context kcontext = 0; |
996 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
997 | krb5_ccache ccdef; |
998 | krb5_principal client, server; | |
999 | krb5_error *err_ret; | |
1000 | register char *cp; | |
1001 | #else | |
1002 | KTEXT ticket; | |
1003 | MSG_DAT msg_data; | |
1004 | CREDENTIALS cred; | |
1005 | Key_schedule schedule; | |
1006 | int rem; | |
a27738b6 | 1007 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1008 | #endif /* KERBEROS */ |
1009 | ||
1010 | int try_count = 0; | |
33a2a872 | 1011 | int connect_ok; |
9c0f2dac | 1012 | |
c2668a61 RS |
1013 | #ifdef WINDOWSNT |
1014 | { | |
1015 | WSADATA winsockData; | |
1016 | if (WSAStartup (0x101, &winsockData) == 0) | |
1017 | have_winsock = 1; | |
1018 | } | |
1019 | #endif | |
1020 | ||
72af86bd | 1021 | memset (&addr, 0, sizeof (addr)); |
9c0f2dac RS |
1022 | addr.sin_family = AF_INET; |
1023 | ||
81264b38 | 1024 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1025 | #ifdef KERBEROS |
1026 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1027 | #else | |
1028 | service = POP_SERVICE; | |
1029 | #endif | |
1030 | ||
1031 | #ifdef HESIOD | |
1032 | if (! (flags & POP_NO_HESIOD)) | |
1033 | { | |
1034 | servent = hes_getservbyname (service, "tcp"); | |
1035 | if (servent) | |
1036 | { | |
1037 | addr.sin_port = servent->s_port; | |
1038 | found_port = 1; | |
1039 | } | |
1040 | } | |
1041 | #endif | |
1042 | if (! found_port) | |
1043 | { | |
1044 | servent = getservbyname (service, "tcp"); | |
1045 | if (servent) | |
1046 | { | |
1047 | addr.sin_port = servent->s_port; | |
1048 | } | |
1049 | else | |
1050 | { | |
81264b38 | 1051 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1052 | #ifdef KERBEROS |
1053 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1054 | POP_PORT : KPOP_PORT); | |
1055 | #else | |
1056 | addr.sin_port = htons (POP_PORT); | |
1057 | #endif | |
1058 | } | |
1059 | } | |
1060 | ||
a27738b6 | 1061 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1062 | |
1063 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1064 | if (sock < 0) | |
1065 | { | |
a27738b6 | 1066 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1067 | strncat (pop_error, strerror (errno), |
a27738b6 | 1068 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac | 1069 | return (-1); |
80b2cbf2 | 1070 | |
9c0f2dac RS |
1071 | } |
1072 | ||
33a2a872 JD |
1073 | #ifdef HAVE_GETADDRINFO |
1074 | memset (&hints, 0, sizeof(hints)); | |
1075 | hints.ai_socktype = SOCK_STREAM; | |
7291159e | 1076 | hints.ai_flags = AI_CANONNAME; |
33a2a872 JD |
1077 | hints.ai_family = AF_INET; |
1078 | do | |
1079 | { | |
1080 | ret = getaddrinfo (host, service, &hints, &res); | |
1081 | try_count++; | |
1082 | if (ret != 0 && (ret != EAI_AGAIN || try_count == 5)) | |
1083 | { | |
1084 | strcpy (pop_error, "Could not determine POP server's address"); | |
1085 | return (-1); | |
1086 | } | |
1087 | } while (ret != 0); | |
1088 | ||
1089 | if (ret == 0) | |
1090 | { | |
1091 | it = res; | |
1092 | while (it) | |
1093 | { | |
1094 | if (it->ai_addrlen == sizeof (addr)) | |
1095 | { | |
1096 | struct sockaddr_in *in_a = (struct sockaddr_in *) it->ai_addr; | |
72af86bd | 1097 | memcpy (&addr.sin_addr, &in_a->sin_addr, sizeof (addr.sin_addr)); |
33a2a872 JD |
1098 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1099 | break; | |
1100 | } | |
1101 | it = it->ai_next; | |
1102 | } | |
1103 | connect_ok = it != NULL; | |
ee15f312 JD |
1104 | if (connect_ok) |
1105 | { | |
1106 | realhost = alloca (strlen (it->ai_canonname) + 1); | |
1107 | strcpy (realhost, it->ai_canonname); | |
1108 | } | |
33a2a872 JD |
1109 | freeaddrinfo (res); |
1110 | } | |
1111 | #else /* !HAVE_GETADDRINFO */ | |
b72f3bcb EZ |
1112 | do |
1113 | { | |
1114 | hostent = gethostbyname (host); | |
1115 | try_count++; | |
1116 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1117 | { | |
1118 | strcpy (pop_error, "Could not determine POP server's address"); | |
1119 | return (-1); | |
1120 | } | |
1121 | } while (! hostent); | |
1122 | ||
9c0f2dac RS |
1123 | while (*hostent->h_addr_list) |
1124 | { | |
72af86bd | 1125 | memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length); |
9c0f2dac RS |
1126 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1127 | break; | |
1128 | hostent->h_addr_list++; | |
1129 | } | |
33a2a872 | 1130 | connect_ok = *hostent->h_addr_list != NULL; |
ee15f312 JD |
1131 | if (! connect_ok) |
1132 | { | |
1133 | realhost = alloca (strlen (hostent->h_name) + 1); | |
1134 | strcpy (realhost, hostent->h_name); | |
1135 | } | |
1136 | ||
33a2a872 | 1137 | #endif /* !HAVE_GETADDRINFO */ |
9c0f2dac RS |
1138 | |
1139 | #define CONNECT_ERROR "Could not connect to POP server: " | |
80b2cbf2 | 1140 | |
33a2a872 | 1141 | if (! connect_ok) |
9c0f2dac | 1142 | { |
de5c39cf | 1143 | CLOSESOCKET (sock); |
9c0f2dac RS |
1144 | strcpy (pop_error, CONNECT_ERROR); |
1145 | strncat (pop_error, strerror (errno), | |
1146 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1147 | return (-1); | |
80b2cbf2 | 1148 | |
9c0f2dac RS |
1149 | } |
1150 | ||
1151 | #ifdef KERBEROS | |
33a2a872 | 1152 | |
9c0f2dac RS |
1153 | #define KRB_ERROR "Kerberos error connecting to POP server: " |
1154 | if (! (flags & POP_NO_KERBEROS)) | |
1155 | { | |
a27738b6 RS |
1156 | #ifdef KERBEROS5 |
1157 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1158 | { |
1159 | krb5error: | |
a27738b6 RS |
1160 | if (auth_context) |
1161 | krb5_auth_con_free (kcontext, auth_context); | |
1162 | if (kcontext) | |
1163 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1164 | strcpy (pop_error, KRB_ERROR); |
1165 | strncat (pop_error, error_message (rem), | |
1166 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1167 | CLOSESOCKET (sock); |
9c0f2dac RS |
1168 | return (-1); |
1169 | } | |
1170 | ||
a27738b6 RS |
1171 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1172 | goto krb5error; | |
80b2cbf2 | 1173 | |
a27738b6 RS |
1174 | if (rem = krb5_cc_default (kcontext, &ccdef)) |
1175 | goto krb5error; | |
1176 | ||
1177 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1178 | goto krb5error; | |
9c0f2dac | 1179 | |
33a2a872 | 1180 | for (cp = realhost; *cp; cp++) |
9c0f2dac RS |
1181 | { |
1182 | if (isupper (*cp)) | |
1183 | { | |
1184 | *cp = tolower (*cp); | |
1185 | } | |
1186 | } | |
1187 | ||
33a2a872 | 1188 | if (rem = krb5_sname_to_principal (kcontext, realhost, |
a27738b6 RS |
1189 | POP_SERVICE, FALSE, &server)) |
1190 | goto krb5error; | |
9c0f2dac | 1191 | |
a27738b6 RS |
1192 | rem = krb5_sendauth (kcontext, &auth_context, |
1193 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1194 | AP_OPTS_MUTUAL_REQUIRED, |
1195 | 0, /* no checksum */ | |
1196 | 0, /* no creds, use ccache instead */ | |
1197 | ccdef, | |
9c0f2dac | 1198 | &err_ret, |
a27738b6 | 1199 | 0, /* don't need subsession key */ |
9c0f2dac | 1200 | 0); /* don't need reply */ |
a27738b6 | 1201 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1202 | if (rem) |
1203 | { | |
5fe92a72 CY |
1204 | strcpy (pop_error, KRB_ERROR); |
1205 | strncat (pop_error, error_message (rem), | |
1206 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1207 | #if defined HAVE_KRB5_ERROR_TEXT | |
9c0f2dac RS |
1208 | if (err_ret && err_ret->text.length) |
1209 | { | |
9c0f2dac RS |
1210 | strncat (pop_error, " [server says '", |
1211 | ERROR_MAX - strlen (pop_error) - 1); | |
1212 | strncat (pop_error, err_ret->text.data, | |
1213 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1214 | err_ret->text.length)); | |
1215 | strncat (pop_error, "']", | |
1216 | ERROR_MAX - strlen (pop_error) - 1); | |
1217 | } | |
5fe92a72 CY |
1218 | #elif defined HAVE_KRB5_ERROR_E_TEXT |
1219 | if (err_ret && err_ret->e_text && strlen(*err_ret->e_text)) | |
9c0f2dac | 1220 | { |
5fe92a72 CY |
1221 | strncat (pop_error, " [server says '", |
1222 | ERROR_MAX - strlen (pop_error) - 1); | |
1223 | strncat (pop_error, *err_ret->e_text, | |
1224 | ERROR_MAX - strlen (pop_error) - 1); | |
1225 | strncat (pop_error, "']", | |
1226 | ERROR_MAX - strlen (pop_error) - 1); | |
9c0f2dac | 1227 | } |
5fe92a72 | 1228 | #endif |
9c0f2dac | 1229 | if (err_ret) |
a27738b6 RS |
1230 | krb5_free_error (kcontext, err_ret); |
1231 | krb5_auth_con_free (kcontext, auth_context); | |
1232 | krb5_free_context (kcontext); | |
9c0f2dac | 1233 | |
de5c39cf | 1234 | CLOSESOCKET (sock); |
9c0f2dac RS |
1235 | return (-1); |
1236 | } | |
80b2cbf2 | 1237 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1238 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1239 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, |
1240 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1241 | (unsigned long) 0, &msg_data, &cred, schedule, |
1242 | (struct sockaddr_in *) 0, | |
1243 | (struct sockaddr_in *) 0, | |
1244 | "KPOPV0.1"); | |
1245 | free ((char *) ticket); | |
1246 | if (rem != KSUCCESS) | |
1247 | { | |
1248 | strcpy (pop_error, KRB_ERROR); | |
1249 | strncat (pop_error, krb_err_txt[rem], | |
1250 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1251 | CLOSESOCKET (sock); |
9c0f2dac RS |
1252 | return (-1); |
1253 | } | |
a27738b6 | 1254 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1255 | } |
1256 | #endif /* KERBEROS */ | |
1257 | ||
1258 | return (sock); | |
1259 | } /* socket_connection */ | |
1260 | ||
1261 | /* | |
60b0a379 | 1262 | * Function: pop_getline |
9c0f2dac RS |
1263 | * |
1264 | * Purpose: Get a line of text from the connection and return a | |
1265 | * pointer to it. The carriage return and linefeed at the end of | |
1266 | * the line are stripped, but periods at the beginnings of lines | |
1267 | * are NOT dealt with in any special way. | |
1268 | * | |
1269 | * Arguments: | |
1270 | * server The server from which to get the line of text. | |
1271 | * | |
d89d0243 KH |
1272 | * Returns: The number of characters in the line, which is returned in |
1273 | * LINE, not including the final null. A return value of 0 | |
1274 | * indicates a blank line. A negative return value indicates an | |
1275 | * error (in which case the contents of LINE are undefined. In | |
1276 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1277 | * |
60b0a379 | 1278 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1279 | * |
1280 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1281 | * |
1282 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1283 | */ |
d89d0243 | 1284 | static int |
873fbd0b | 1285 | pop_getline (popserver server, char **line) |
9c0f2dac RS |
1286 | { |
1287 | #define GETLINE_ERROR "Error reading from server: " | |
1288 | ||
1289 | int ret; | |
b6606ad8 RS |
1290 | int search_offset = 0; |
1291 | ||
9c0f2dac RS |
1292 | if (server->data) |
1293 | { | |
d89d0243 KH |
1294 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1295 | server->data); | |
9c0f2dac RS |
1296 | if (cp) |
1297 | { | |
1298 | int found; | |
1299 | int data_used; | |
1300 | ||
1301 | found = server->buffer_index; | |
1302 | data_used = (cp + 2) - server->buffer - found; | |
80b2cbf2 | 1303 | |
9c0f2dac RS |
1304 | *cp = '\0'; /* terminate the string to be returned */ |
1305 | server->data -= data_used; | |
1306 | server->buffer_index += data_used; | |
1307 | ||
1308 | if (pop_debug) | |
d89d0243 KH |
1309 | /* Embedded nulls will truncate this output prematurely, |
1310 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1311 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1312 | *line = server->buffer + found; |
1313 | return (data_used - 2); | |
9c0f2dac RS |
1314 | } |
1315 | else | |
1316 | { | |
72af86bd AS |
1317 | memmove (server->buffer, server->buffer + server->buffer_index, |
1318 | server->data); | |
b6606ad8 RS |
1319 | /* Record the fact that we've searched the data already in |
1320 | the buffer for a CRLF, so that when we search below, we | |
1321 | don't have to search the same data twice. There's a "- | |
1322 | 1" here to account for the fact that the last character | |
1323 | of the data we have may be the CR of a CRLF pair, of | |
1324 | which we haven't read the second half yet, so we may have | |
1325 | to search it again when we read more data. */ | |
1326 | search_offset = server->data - 1; | |
9c0f2dac RS |
1327 | server->buffer_index = 0; |
1328 | } | |
1329 | } | |
1330 | else | |
1331 | { | |
1332 | server->buffer_index = 0; | |
1333 | } | |
1334 | ||
1335 | while (1) | |
1336 | { | |
bbcac09c RS |
1337 | /* There's a "- 1" here to leave room for the null that we put |
1338 | at the end of the read data below. We put the null there so | |
1339 | that find_crlf knows where to stop when we call it. */ | |
1340 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1341 | { |
bbcac09c RS |
1342 | server->buffer_size += GETLINE_INCR; |
1343 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1344 | if (! server->buffer) | |
9c0f2dac | 1345 | { |
bbcac09c RS |
1346 | strcpy (pop_error, "Out of memory in pop_getline"); |
1347 | pop_trash (server); | |
1348 | return (-1); | |
0ea95737 | 1349 | } |
0ea95737 | 1350 | } |
bbcac09c RS |
1351 | ret = RECV (server->file, server->buffer + server->data, |
1352 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1353 | if (ret < 0) |
1354 | { | |
1355 | strcpy (pop_error, GETLINE_ERROR); | |
1356 | strncat (pop_error, strerror (errno), | |
1357 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1358 | pop_trash (server); | |
d89d0243 | 1359 | return (-1); |
9c0f2dac RS |
1360 | } |
1361 | else if (ret == 0) | |
1362 | { | |
60b0a379 | 1363 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1364 | pop_trash (server); |
d89d0243 | 1365 | return (-1); |
9c0f2dac RS |
1366 | } |
1367 | else | |
1368 | { | |
7a481e50 | 1369 | char *cp; |
9c0f2dac | 1370 | server->data += ret; |
7a481e50 | 1371 | server->buffer[server->data] = '\0'; |
80b2cbf2 | 1372 | |
d89d0243 KH |
1373 | cp = find_crlf (server->buffer + search_offset, |
1374 | server->data - search_offset); | |
9c0f2dac RS |
1375 | if (cp) |
1376 | { | |
1377 | int data_used = (cp + 2) - server->buffer; | |
1378 | *cp = '\0'; | |
1379 | server->data -= data_used; | |
1380 | server->buffer_index = data_used; | |
1381 | ||
1382 | if (pop_debug) | |
1383 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1384 | *line = server->buffer; |
1385 | return (data_used - 2); | |
9c0f2dac | 1386 | } |
a8f44d07 RS |
1387 | /* As above, the "- 1" here is to account for the fact that |
1388 | we may have read a CR without its accompanying LF. */ | |
1389 | search_offset += ret - 1; | |
9c0f2dac RS |
1390 | } |
1391 | } | |
1392 | ||
1393 | /* NOTREACHED */ | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * Function: sendline | |
1398 | * | |
1399 | * Purpose: Sends a line of text to the POP server. The line of text | |
1400 | * passed into this function should NOT have the carriage return | |
1401 | * and linefeed on the end of it. Periods at beginnings of lines | |
1402 | * will NOT be treated specially by this function. | |
1403 | * | |
1404 | * Arguments: | |
1405 | * server The server to which to send the text. | |
1406 | * line The line of text to send. | |
1407 | * | |
1408 | * Return value: Upon successful completion, a value of 0 will be | |
1409 | * returned. Otherwise, a non-zero value will be returned, and | |
1410 | * an error will be copied into pop_error. | |
1411 | * | |
1412 | * Side effects: Closes the connection on error. | |
1413 | */ | |
1414 | static int | |
988e88ab | 1415 | sendline (popserver server, const char *line) |
9c0f2dac RS |
1416 | { |
1417 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1418 | int ret; | |
ec641d50 KR |
1419 | char *buf; |
1420 | ||
1421 | /* Combine the string and the CR-LF into one buffer. Otherwise, two | |
1422 | reasonable network stack optimizations, Nagle's algorithm and | |
1423 | delayed acks, combine to delay us a fraction of a second on every | |
1424 | message we send. (Movemail writes line without \r\n, client | |
1425 | kernel sends packet, server kernel delays the ack to see if it | |
1426 | can combine it with data, movemail writes \r\n, client kernel | |
1427 | waits because it has unacked data already in its outgoing queue, | |
1428 | client kernel eventually times out and sends.) | |
1429 | ||
1430 | This can be something like 0.2s per command, which can add up | |
1431 | over a few dozen messages, and is a big chunk of the time we | |
1432 | spend fetching mail from a server close by. */ | |
1433 | buf = alloca (strlen (line) + 3); | |
1434 | strcpy (buf, line); | |
1435 | strcat (buf, "\r\n"); | |
1436 | ret = fullwrite (server->file, buf, strlen (buf)); | |
9c0f2dac RS |
1437 | |
1438 | if (ret < 0) | |
1439 | { | |
1440 | pop_trash (server); | |
1441 | strcpy (pop_error, SENDLINE_ERROR); | |
1442 | strncat (pop_error, strerror (errno), | |
1443 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1444 | return (ret); | |
1445 | } | |
1446 | ||
1447 | if (pop_debug) | |
1448 | fprintf (stderr, ">>> %s\n", line); | |
1449 | ||
1450 | return (0); | |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * Procedure: fullwrite | |
1455 | * | |
1456 | * Purpose: Just like write, but keeps trying until the entire string | |
1457 | * has been written. | |
1458 | * | |
1459 | * Return value: Same as write. Pop_error is not set. | |
1460 | */ | |
1461 | static int | |
873fbd0b | 1462 | fullwrite (int fd, char *buf, int nbytes) |
9c0f2dac RS |
1463 | { |
1464 | char *cp; | |
9d3f4cee | 1465 | int ret = 0; |
9c0f2dac RS |
1466 | |
1467 | cp = buf; | |
9d3f4cee | 1468 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1469 | { |
1470 | cp += ret; | |
1471 | nbytes -= ret; | |
1472 | } | |
1473 | ||
1474 | return (ret); | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * Procedure getok | |
1479 | * | |
1480 | * Purpose: Reads a line from the server. If the return indicator is | |
1481 | * positive, return with a zero exit status. If not, return with | |
1482 | * a negative exit status. | |
1483 | * | |
1484 | * Arguments: | |
1485 | * server The server to read from. | |
80b2cbf2 | 1486 | * |
9c0f2dac RS |
1487 | * Returns: 0 for success, else for failure and puts error in pop_error. |
1488 | * | |
8e6208c5 | 1489 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1490 | */ |
1491 | static int | |
873fbd0b | 1492 | getok (popserver server) |
9c0f2dac RS |
1493 | { |
1494 | char *fromline; | |
1495 | ||
60b0a379 | 1496 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1497 | { |
1498 | return (-1); | |
1499 | } | |
1500 | ||
1501 | if (! strncmp (fromline, "+OK", 3)) | |
1502 | return (0); | |
1503 | else if (! strncmp (fromline, "-ERR", 4)) | |
1504 | { | |
1505 | strncpy (pop_error, fromline, ERROR_MAX); | |
1506 | pop_error[ERROR_MAX-1] = '\0'; | |
1507 | return (-1); | |
1508 | } | |
1509 | else | |
1510 | { | |
1511 | strcpy (pop_error, | |
1512 | "Unexpected response from server; expecting +OK or -ERR"); | |
1513 | pop_trash (server); | |
1514 | return (-1); | |
1515 | } | |
80b2cbf2 | 1516 | } |
9c0f2dac RS |
1517 | |
1518 | #if 0 | |
1519 | /* | |
1520 | * Function: gettermination | |
1521 | * | |
1522 | * Purpose: Gets the next line and verifies that it is a termination | |
1523 | * line (nothing but a dot). | |
1524 | * | |
1525 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1526 | * | |
1527 | * Side effects: Closes the connection on error. | |
1528 | */ | |
1529 | static int | |
1530 | gettermination (server) | |
1531 | popserver server; | |
1532 | { | |
1533 | char *fromserver; | |
1534 | ||
60b0a379 | 1535 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1536 | return (-1); |
1537 | ||
1538 | if (strcmp (fromserver, ".")) | |
1539 | { | |
1540 | strcpy (pop_error, | |
1541 | "Unexpected response from server in gettermination"); | |
1542 | pop_trash (server); | |
1543 | return (-1); | |
1544 | } | |
1545 | ||
1546 | return (0); | |
1547 | } | |
1548 | #endif | |
1549 | ||
1550 | /* | |
1551 | * Function pop_close | |
1552 | * | |
1553 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1554 | * preserve any changes that were made and a "QUIT" command to | |
1555 | * try to get the server to quit, but ignoring any responses that | |
1556 | * are received. | |
1557 | * | |
8e6208c5 | 1558 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1559 | * Changes made to the maildrop since the session was started (or |
1560 | * since the last pop_reset) may be lost. | |
1561 | */ | |
80b2cbf2 | 1562 | void |
873fbd0b | 1563 | pop_close (popserver server) |
9c0f2dac RS |
1564 | { |
1565 | pop_trash (server); | |
1566 | free ((char *) server); | |
1567 | ||
1568 | return; | |
1569 | } | |
1570 | ||
1571 | /* | |
1572 | * Function: pop_trash | |
1573 | * | |
1574 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
4d90eee4 | 1575 | * memory associated with the server. It is valid to call |
9c0f2dac RS |
1576 | * pop_close or pop_quit after this function has been called. |
1577 | */ | |
1578 | static void | |
873fbd0b | 1579 | pop_trash (popserver server) |
9c0f2dac RS |
1580 | { |
1581 | if (server->file >= 0) | |
1582 | { | |
c2668a61 RS |
1583 | /* avoid recursion; sendline can call pop_trash */ |
1584 | if (server->trash_started) | |
1585 | return; | |
1586 | server->trash_started = 1; | |
de5c39cf | 1587 | |
9c0f2dac RS |
1588 | sendline (server, "RSET"); |
1589 | sendline (server, "QUIT"); | |
1590 | ||
de5c39cf | 1591 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1592 | server->file = -1; |
1593 | if (server->buffer) | |
1594 | { | |
1595 | free (server->buffer); | |
1596 | server->buffer = 0; | |
1597 | } | |
1598 | } | |
c2668a61 RS |
1599 | |
1600 | #ifdef WINDOWSNT | |
1601 | if (have_winsock) | |
1602 | WSACleanup (); | |
1603 | #endif | |
9c0f2dac RS |
1604 | } |
1605 | ||
d89d0243 KH |
1606 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1607 | embedded nulls and has LEN characters in it not including the final | |
1608 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1609 | |
1610 | static char * | |
873fbd0b | 1611 | find_crlf (char *in_string, int len) |
9c0f2dac | 1612 | { |
d89d0243 | 1613 | while (len--) |
9c0f2dac | 1614 | { |
d89d0243 | 1615 | if (*in_string == '\r') |
8148baf9 RS |
1616 | { |
1617 | if (*++in_string == '\n') | |
1618 | return (in_string - 1); | |
1619 | } | |
1620 | else | |
1621 | in_string++; | |
9c0f2dac | 1622 | } |
d89d0243 | 1623 | return (0); |
9c0f2dac RS |
1624 | } |
1625 | ||
1626 | #endif /* MAIL_USE_POP */ |