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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 | 68 | #include <string.h> |
020d3015 | 69 | #include <unistd.h> |
625ad89f | 70 | |
9c0f2dac | 71 | #ifdef KERBEROS |
a27738b6 RS |
72 | # ifdef HAVE_KRB5_H |
73 | # include <krb5.h> | |
74 | # endif | |
a27738b6 RS |
75 | # ifdef HAVE_KRB_H |
76 | # include <krb.h> | |
77 | # else | |
78 | # ifdef HAVE_KERBEROSIV_KRB_H | |
79 | # include <kerberosIV/krb.h> | |
80 | # else | |
81 | # ifdef HAVE_KERBEROS_KRB_H | |
82 | # include <kerberos/krb.h> | |
83 | # endif | |
84 | # endif | |
85 | # endif | |
86 | # ifdef HAVE_COM_ERR_H | |
87 | # include <com_err.h> | |
88 | # endif | |
8148baf9 | 89 | #endif /* KERBEROS */ |
9c0f2dac | 90 | |
ba01e9d7 PE |
91 | #include <min-max.h> |
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 | ||
9c0f2dac RS |
133 | /* |
134 | * Function: pop_open (char *host, char *username, char *password, | |
135 | * int flags) | |
136 | * | |
137 | * Purpose: Establishes a connection with a post-office server, and | |
138 | * completes the authorization portion of the session. | |
139 | * | |
140 | * Arguments: | |
141 | * host The server host with which the connection should be | |
142 | * established. Optional. If omitted, internal | |
143 | * heuristics will be used to determine the server host, | |
144 | * if possible. | |
145 | * username | |
146 | * The username of the mail-drop to access. Optional. | |
147 | * If omitted, internal heuristics will be used to | |
148 | * determine the username, if possible. | |
149 | * password | |
150 | * The password to use for authorization. If omitted, | |
151 | * internal heuristics will be used to determine the | |
152 | * password, if possible. | |
153 | * flags A bit mask containing flags controlling certain | |
154 | * functions of the routine. Valid flags are defined in | |
155 | * the file pop.h | |
156 | * | |
157 | * Return value: Upon successful establishment of a connection, a | |
158 | * non-null popserver will be returned. Otherwise, null will be | |
159 | * returned, and the string variable pop_error will contain an | |
160 | * explanation of the error. | |
161 | */ | |
162 | popserver | |
873fbd0b | 163 | pop_open (char *host, char *username, char *password, int flags) |
9c0f2dac RS |
164 | { |
165 | int sock; | |
166 | popserver server; | |
167 | ||
168 | /* Determine the user name */ | |
169 | if (! username) | |
170 | { | |
171 | username = getenv ("USER"); | |
172 | if (! (username && *username)) | |
173 | { | |
174 | username = getlogin (); | |
175 | if (! (username && *username)) | |
176 | { | |
177 | struct passwd *passwd; | |
178 | passwd = getpwuid (getuid ()); | |
179 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
180 | { | |
181 | username = passwd->pw_name; | |
182 | } | |
183 | else | |
184 | { | |
185 | strcpy (pop_error, "Could not determine username"); | |
186 | return (0); | |
187 | } | |
188 | } | |
189 | } | |
190 | } | |
191 | ||
192 | /* | |
193 | * Determine the mail host. | |
194 | */ | |
195 | ||
196 | if (! host) | |
197 | { | |
198 | host = getenv ("MAILHOST"); | |
199 | } | |
200 | ||
201 | #ifdef HESIOD | |
202 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
203 | { | |
204 | struct hes_postoffice *office; | |
205 | office = hes_getmailhost (username); | |
206 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
207 | && office->po_name && *office->po_name && office->po_host | |
208 | && *office->po_host) | |
209 | { | |
210 | host = office->po_host; | |
211 | username = office->po_name; | |
212 | } | |
213 | } | |
214 | #endif | |
215 | ||
216 | #ifdef MAILHOST | |
217 | if (! host) | |
218 | { | |
219 | host = MAILHOST; | |
220 | } | |
221 | #endif | |
222 | ||
223 | if (! host) | |
224 | { | |
225 | strcpy (pop_error, "Could not determine POP server"); | |
226 | return (0); | |
227 | } | |
228 | ||
229 | /* Determine the password */ | |
bbcac09c RS |
230 | #ifdef KERBEROS |
231 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
9c0f2dac | 232 | #else |
bbcac09c | 233 | #define DONT_NEED_PASSWORD 0 |
9c0f2dac | 234 | #endif |
177c0ea7 | 235 | |
9c0f2dac RS |
236 | if ((! password) && (! DONT_NEED_PASSWORD)) |
237 | { | |
238 | if (! (flags & POP_NO_GETPASS)) | |
239 | { | |
240 | password = getpass ("Enter POP password:"); | |
241 | } | |
242 | if (! password) | |
243 | { | |
244 | strcpy (pop_error, "Could not determine POP password"); | |
245 | return (0); | |
246 | } | |
247 | } | |
81264b38 | 248 | if (password) /* always true, detected 20060515 */ |
bbcac09c | 249 | flags |= POP_NO_KERBEROS; |
9c0f2dac | 250 | else |
81264b38 FP |
251 | password = username; /* dead code, detected 20060515 */ |
252 | /** "kpop" service is never used: look for 20060515 to see why **/ | |
9c0f2dac RS |
253 | |
254 | sock = socket_connection (host, flags); | |
255 | if (sock == -1) | |
256 | return (0); | |
257 | ||
258 | server = (popserver) malloc (sizeof (struct _popserver)); | |
259 | if (! server) | |
260 | { | |
261 | strcpy (pop_error, "Out of memory in pop_open"); | |
262 | return (0); | |
263 | } | |
264 | server->buffer = (char *) malloc (GETLINE_MIN); | |
265 | if (! server->buffer) | |
266 | { | |
267 | strcpy (pop_error, "Out of memory in pop_open"); | |
268 | free ((char *) server); | |
269 | return (0); | |
270 | } | |
80b2cbf2 | 271 | |
9c0f2dac RS |
272 | server->file = sock; |
273 | server->data = 0; | |
274 | server->buffer_index = 0; | |
275 | server->buffer_size = GETLINE_MIN; | |
276 | server->in_multi = 0; | |
c2668a61 | 277 | server->trash_started = 0; |
9c0f2dac RS |
278 | |
279 | if (getok (server)) | |
280 | return (0); | |
281 | ||
282 | /* | |
283 | * I really shouldn't use the pop_error variable like this, but.... | |
284 | */ | |
285 | if (strlen (username) > ERROR_MAX - 6) | |
286 | { | |
287 | pop_close (server); | |
288 | strcpy (pop_error, | |
289 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
290 | return (0); | |
291 | } | |
292 | sprintf (pop_error, "USER %s", username); | |
293 | ||
294 | if (sendline (server, pop_error) || getok (server)) | |
295 | { | |
296 | return (0); | |
297 | } | |
298 | ||
299 | if (strlen (password) > ERROR_MAX - 6) | |
300 | { | |
301 | pop_close (server); | |
302 | strcpy (pop_error, | |
303 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
304 | return (0); | |
305 | } | |
306 | sprintf (pop_error, "PASS %s", password); | |
307 | ||
308 | if (sendline (server, pop_error) || getok (server)) | |
309 | { | |
310 | return (0); | |
311 | } | |
312 | ||
313 | return (server); | |
314 | } | |
315 | ||
316 | /* | |
317 | * Function: pop_stat | |
318 | * | |
319 | * Purpose: Issue the STAT command to the server and return (in the | |
320 | * value parameters) the number of messages in the maildrop and | |
321 | * the total size of the maildrop. | |
322 | * | |
323 | * Return value: 0 on success, or non-zero with an error in pop_error | |
324 | * in failure. | |
325 | * | |
326 | * Side effects: On failure, may make further operations on the | |
327 | * connection impossible. | |
328 | */ | |
329 | int | |
873fbd0b | 330 | pop_stat (popserver server, int *count, int *size) |
9c0f2dac RS |
331 | { |
332 | char *fromserver; | |
0b074993 | 333 | char *end_ptr; |
9c0f2dac RS |
334 | |
335 | if (server->in_multi) | |
336 | { | |
337 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
338 | return (-1); | |
339 | } | |
80b2cbf2 | 340 | |
60b0a379 | 341 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
342 | return (-1); |
343 | ||
344 | if (strncmp (fromserver, "+OK ", 4)) | |
345 | { | |
346 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
347 | { | |
348 | strncpy (pop_error, fromserver, ERROR_MAX); | |
349 | } | |
350 | else | |
351 | { | |
352 | strcpy (pop_error, | |
353 | "Unexpected response from POP server in pop_stat"); | |
354 | pop_trash (server); | |
355 | } | |
356 | return (-1); | |
357 | } | |
358 | ||
0b074993 CY |
359 | errno = 0; |
360 | *count = strtol (&fromserver[4], &end_ptr, 10); | |
361 | /* Check validity of string-to-integer conversion. */ | |
59a431d6 | 362 | if (fromserver + 4 == end_ptr || *end_ptr != ' ' || errno) |
0b074993 CY |
363 | { |
364 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
365 | pop_trash (server); | |
366 | return (-1); | |
367 | } | |
80b2cbf2 | 368 | |
59a431d6 | 369 | fromserver = end_ptr; |
9c0f2dac | 370 | |
0b074993 CY |
371 | errno = 0; |
372 | *size = strtol (fromserver + 1, &end_ptr, 10); | |
59a431d6 | 373 | if (fromserver + 1 == end_ptr || errno) |
0b074993 CY |
374 | { |
375 | strcpy (pop_error, "Unexpected response from POP server in pop_stat"); | |
376 | pop_trash (server); | |
377 | return (-1); | |
378 | } | |
9c0f2dac RS |
379 | |
380 | return (0); | |
381 | } | |
382 | ||
383 | /* | |
384 | * Function: pop_list | |
385 | * | |
386 | * Purpose: Performs the POP "list" command and returns (in value | |
387 | * parameters) two malloc'd zero-terminated arrays -- one of | |
388 | * message IDs, and a parallel one of sizes. | |
389 | * | |
390 | * Arguments: | |
391 | * server The pop connection to talk to. | |
392 | * message The number of the one message about which to get | |
393 | * information, or 0 to get information about all | |
394 | * messages. | |
395 | * | |
396 | * Return value: 0 on success, non-zero with error in pop_error on | |
397 | * failure. | |
398 | * | |
399 | * Side effects: On failure, may make further operations on the | |
400 | * connection impossible. | |
401 | */ | |
402 | int | |
873fbd0b | 403 | pop_list (popserver server, int message, int **IDs, int **sizes) |
9c0f2dac RS |
404 | { |
405 | int how_many, i; | |
406 | char *fromserver; | |
407 | ||
408 | if (server->in_multi) | |
409 | { | |
410 | strcpy (pop_error, "In multi-line query in pop_list"); | |
411 | return (-1); | |
412 | } | |
413 | ||
414 | if (message) | |
415 | how_many = 1; | |
416 | else | |
417 | { | |
418 | int count, size; | |
419 | if (pop_stat (server, &count, &size)) | |
420 | return (-1); | |
421 | how_many = count; | |
422 | } | |
423 | ||
424 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
425 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
426 | if (! (*IDs && *sizes)) | |
427 | { | |
428 | strcpy (pop_error, "Out of memory in pop_list"); | |
429 | return (-1); | |
430 | } | |
431 | ||
432 | if (message) | |
433 | { | |
434 | sprintf (pop_error, "LIST %d", message); | |
435 | if (sendline (server, pop_error)) | |
436 | { | |
437 | free ((char *) *IDs); | |
438 | free ((char *) *sizes); | |
439 | return (-1); | |
440 | } | |
60b0a379 | 441 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
442 | { |
443 | free ((char *) *IDs); | |
444 | free ((char *) *sizes); | |
445 | return (-1); | |
446 | } | |
447 | if (strncmp (fromserver, "+OK ", 4)) | |
448 | { | |
449 | if (! strncmp (fromserver, "-ERR", 4)) | |
450 | strncpy (pop_error, fromserver, ERROR_MAX); | |
451 | else | |
452 | { | |
453 | strcpy (pop_error, | |
454 | "Unexpected response from server in pop_list"); | |
455 | pop_trash (server); | |
456 | } | |
457 | free ((char *) *IDs); | |
458 | free ((char *) *sizes); | |
459 | return (-1); | |
460 | } | |
461 | (*IDs)[0] = atoi (&fromserver[4]); | |
8966b757 | 462 | fromserver = strchr (&fromserver[4], ' '); |
9c0f2dac RS |
463 | if (! fromserver) |
464 | { | |
465 | strcpy (pop_error, | |
466 | "Badly formatted response from server in pop_list"); | |
467 | pop_trash (server); | |
468 | free ((char *) *IDs); | |
469 | free ((char *) *sizes); | |
470 | return (-1); | |
471 | } | |
472 | (*sizes)[0] = atoi (fromserver); | |
473 | (*IDs)[1] = (*sizes)[1] = 0; | |
474 | return (0); | |
475 | } | |
476 | else | |
477 | { | |
478 | if (pop_multi_first (server, "LIST", &fromserver)) | |
479 | { | |
480 | free ((char *) *IDs); | |
481 | free ((char *) *sizes); | |
482 | return (-1); | |
483 | } | |
484 | for (i = 0; i < how_many; i++) | |
485 | { | |
d89d0243 | 486 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
487 | { |
488 | free ((char *) *IDs); | |
489 | free ((char *) *sizes); | |
490 | return (-1); | |
491 | } | |
492 | (*IDs)[i] = atoi (fromserver); | |
8966b757 | 493 | fromserver = strchr (fromserver, ' '); |
9c0f2dac RS |
494 | if (! fromserver) |
495 | { | |
496 | strcpy (pop_error, | |
497 | "Badly formatted response from server in pop_list"); | |
498 | free ((char *) *IDs); | |
499 | free ((char *) *sizes); | |
500 | pop_trash (server); | |
501 | return (-1); | |
502 | } | |
503 | (*sizes)[i] = atoi (fromserver); | |
504 | } | |
d89d0243 | 505 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
506 | { |
507 | free ((char *) *IDs); | |
508 | free ((char *) *sizes); | |
509 | return (-1); | |
510 | } | |
511 | else if (fromserver) | |
512 | { | |
513 | strcpy (pop_error, | |
514 | "Too many response lines from server in pop_list"); | |
515 | free ((char *) *IDs); | |
516 | free ((char *) *sizes); | |
517 | return (-1); | |
518 | } | |
519 | (*IDs)[i] = (*sizes)[i] = 0; | |
520 | return (0); | |
521 | } | |
522 | } | |
523 | ||
524 | /* | |
525 | * Function: pop_retrieve | |
526 | * | |
527 | * Purpose: Retrieve a specified message from the maildrop. | |
528 | * | |
529 | * Arguments: | |
530 | * server The server to retrieve from. | |
531 | * message The message number to retrieve. | |
532 | * markfrom | |
533 | * If true, then mark the string "From " at the beginning | |
534 | * of lines with '>'. | |
d89d0243 KH |
535 | * msg_buf Output parameter to which a buffer containing the |
536 | * message is assigned. | |
177c0ea7 | 537 | * |
d89d0243 KH |
538 | * Return value: The number of bytes in msg_buf, which may contain |
539 | * embedded nulls, not including its final null, or -1 on error | |
540 | * with pop_error set. | |
9c0f2dac RS |
541 | * |
542 | * Side effects: May kill connection on error. | |
543 | */ | |
d89d0243 | 544 | int |
873fbd0b | 545 | pop_retrieve (popserver server, int message, int markfrom, char **msg_buf) |
9c0f2dac RS |
546 | { |
547 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
548 | char *ptr, *fromserver; | |
549 | int ret; | |
550 | ||
551 | if (server->in_multi) | |
552 | { | |
553 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 554 | return (-1); |
9c0f2dac RS |
555 | } |
556 | ||
557 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 558 | return (-1); |
9c0f2dac RS |
559 | |
560 | if (pop_retrieve_first (server, message, &fromserver)) | |
561 | { | |
d89d0243 | 562 | return (-1); |
9c0f2dac RS |
563 | } |
564 | ||
565 | /* | |
566 | * The "5" below is an arbitrary constant -- I assume that if | |
567 | * there are "From" lines in the text to be marked, there | |
568 | * probably won't be more than 5 of them. If there are, I | |
569 | * allocate more space for them below. | |
570 | */ | |
571 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 572 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
573 | free ((char *) IDs); |
574 | free ((char *) sizes); | |
575 | ||
576 | if (! ptr) | |
577 | { | |
578 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
579 | pop_retrieve_flush (server); | |
d89d0243 | 580 | return (-1); |
9c0f2dac RS |
581 | } |
582 | ||
d89d0243 | 583 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 584 | { |
9c0f2dac RS |
585 | if (! fromserver) |
586 | { | |
587 | ptr[cp] = '\0'; | |
d89d0243 KH |
588 | *msg_buf = ptr; |
589 | return (cp); | |
9c0f2dac RS |
590 | } |
591 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
592 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
593 | fromserver[4] == ' ') | |
594 | { | |
595 | if (++fromcount == 5) | |
596 | { | |
597 | bufsize += 5; | |
7d665945 | 598 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
599 | if (! ptr) |
600 | { | |
601 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
602 | pop_retrieve_flush (server); | |
d89d0243 | 603 | return (-1); |
9c0f2dac RS |
604 | } |
605 | fromcount = 0; | |
606 | } | |
607 | ptr[cp++] = '>'; | |
608 | } | |
72af86bd | 609 | memcpy (&ptr[cp], fromserver, ret); |
d89d0243 | 610 | cp += ret; |
9c0f2dac RS |
611 | ptr[cp++] = '\n'; |
612 | } | |
613 | ||
d89d0243 KH |
614 | free (ptr); |
615 | return (-1); | |
177c0ea7 | 616 | } |
9c0f2dac RS |
617 | |
618 | int | |
873fbd0b | 619 | pop_retrieve_first (popserver server, int message, char **response) |
9c0f2dac RS |
620 | { |
621 | sprintf (pop_error, "RETR %d", message); | |
622 | return (pop_multi_first (server, pop_error, response)); | |
623 | } | |
624 | ||
d89d0243 KH |
625 | /* |
626 | Returns a negative number on error, 0 to indicate that the data has | |
627 | all been read (i.e., the server has returned a "." termination | |
628 | line), or a positive number indicating the number of bytes in the | |
629 | returned buffer (which is null-terminated and may contain embedded | |
630 | nulls, but the returned bytecount doesn't include the final null). | |
631 | */ | |
632 | ||
9c0f2dac | 633 | int |
873fbd0b | 634 | pop_retrieve_next (popserver server, char **line) |
9c0f2dac RS |
635 | { |
636 | return (pop_multi_next (server, line)); | |
637 | } | |
638 | ||
639 | int | |
873fbd0b | 640 | pop_retrieve_flush (popserver server) |
9c0f2dac RS |
641 | { |
642 | return (pop_multi_flush (server)); | |
643 | } | |
644 | ||
645 | int | |
873fbd0b | 646 | pop_top_first (popserver server, int message, int lines, char **response) |
9c0f2dac RS |
647 | { |
648 | sprintf (pop_error, "TOP %d %d", message, lines); | |
649 | return (pop_multi_first (server, pop_error, response)); | |
650 | } | |
651 | ||
d89d0243 KH |
652 | /* |
653 | Returns a negative number on error, 0 to indicate that the data has | |
654 | all been read (i.e., the server has returned a "." termination | |
655 | line), or a positive number indicating the number of bytes in the | |
656 | returned buffer (which is null-terminated and may contain embedded | |
657 | nulls, but the returned bytecount doesn't include the final null). | |
658 | */ | |
659 | ||
9c0f2dac | 660 | int |
873fbd0b | 661 | pop_top_next (popserver server, char **line) |
9c0f2dac RS |
662 | { |
663 | return (pop_multi_next (server, line)); | |
664 | } | |
665 | ||
666 | int | |
873fbd0b | 667 | pop_top_flush (popserver server) |
9c0f2dac RS |
668 | { |
669 | return (pop_multi_flush (server)); | |
670 | } | |
671 | ||
672 | int | |
988e88ab | 673 | pop_multi_first (popserver server, const char *command, char **response) |
9c0f2dac RS |
674 | { |
675 | if (server->in_multi) | |
676 | { | |
677 | strcpy (pop_error, | |
678 | "Already in multi-line query in pop_multi_first"); | |
679 | return (-1); | |
680 | } | |
681 | ||
60b0a379 | 682 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
683 | { |
684 | return (-1); | |
685 | } | |
686 | ||
687 | if (0 == strncmp (*response, "-ERR", 4)) | |
688 | { | |
689 | strncpy (pop_error, *response, ERROR_MAX); | |
690 | return (-1); | |
691 | } | |
692 | else if (0 == strncmp (*response, "+OK", 3)) | |
693 | { | |
694 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
695 | server->in_multi = 1; | |
696 | return (0); | |
697 | } | |
698 | else | |
699 | { | |
700 | strcpy (pop_error, | |
701 | "Unexpected response from server in pop_multi_first"); | |
702 | return (-1); | |
703 | } | |
704 | } | |
705 | ||
d89d0243 KH |
706 | /* |
707 | Read the next line of data from SERVER and place a pointer to it | |
708 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
709 | (i.e., the server has returned a line containing only "."), or a | |
710 | positive number indicating the number of bytes in the LINE buffer | |
711 | (not including the final null). The data in that buffer may contain | |
712 | embedded nulls, but does not contain the final CRLF. When returning | |
713 | 0, LINE is set to null. */ | |
714 | ||
9c0f2dac | 715 | int |
873fbd0b | 716 | pop_multi_next (popserver server, char **line) |
9c0f2dac RS |
717 | { |
718 | char *fromserver; | |
d89d0243 | 719 | int ret; |
9c0f2dac RS |
720 | |
721 | if (! server->in_multi) | |
722 | { | |
723 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
724 | return (-1); | |
725 | } | |
726 | ||
60b0a379 | 727 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
728 | { |
729 | return (-1); | |
730 | } | |
731 | ||
732 | if (fromserver[0] == '.') | |
733 | { | |
734 | if (! fromserver[1]) | |
735 | { | |
736 | *line = 0; | |
737 | server->in_multi = 0; | |
738 | return (0); | |
739 | } | |
740 | else | |
741 | { | |
742 | *line = fromserver + 1; | |
d89d0243 | 743 | return (ret - 1); |
9c0f2dac RS |
744 | } |
745 | } | |
746 | else | |
747 | { | |
748 | *line = fromserver; | |
d89d0243 | 749 | return (ret); |
9c0f2dac RS |
750 | } |
751 | } | |
752 | ||
753 | int | |
873fbd0b | 754 | pop_multi_flush (popserver server) |
9c0f2dac RS |
755 | { |
756 | char *line; | |
d89d0243 | 757 | int ret; |
9c0f2dac RS |
758 | |
759 | if (! server->in_multi) | |
760 | { | |
761 | return (0); | |
762 | } | |
763 | ||
d89d0243 | 764 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 765 | { |
d89d0243 KH |
766 | if (ret < 0) |
767 | return (-1); | |
9c0f2dac RS |
768 | } |
769 | ||
d89d0243 | 770 | return (0); |
9c0f2dac RS |
771 | } |
772 | ||
773 | /* Function: pop_delete | |
774 | * | |
775 | * Purpose: Delete a specified message. | |
776 | * | |
777 | * Arguments: | |
778 | * server Server from which to delete the message. | |
779 | * message Message to delete. | |
780 | * | |
781 | * Return value: 0 on success, non-zero with error in pop_error | |
782 | * otherwise. | |
783 | */ | |
784 | int | |
873fbd0b | 785 | pop_delete (popserver server, int message) |
9c0f2dac RS |
786 | { |
787 | if (server->in_multi) | |
788 | { | |
789 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
790 | return (-1); | |
791 | } | |
792 | ||
793 | sprintf (pop_error, "DELE %d", message); | |
794 | ||
795 | if (sendline (server, pop_error) || getok (server)) | |
796 | return (-1); | |
797 | ||
798 | return (0); | |
799 | } | |
800 | ||
801 | /* | |
802 | * Function: pop_noop | |
803 | * | |
804 | * Purpose: Send a noop command to the server. | |
805 | * | |
806 | * Argument: | |
807 | * server The server to send to. | |
808 | * | |
809 | * Return value: 0 on success, non-zero with error in pop_error | |
810 | * otherwise. | |
811 | * | |
812 | * Side effects: Closes connection on error. | |
813 | */ | |
814 | int | |
873fbd0b | 815 | pop_noop (popserver server) |
9c0f2dac RS |
816 | { |
817 | if (server->in_multi) | |
818 | { | |
819 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
820 | return (-1); | |
821 | } | |
822 | ||
823 | if (sendline (server, "NOOP") || getok (server)) | |
824 | return (-1); | |
825 | ||
826 | return (0); | |
827 | } | |
828 | ||
829 | /* | |
830 | * Function: pop_last | |
831 | * | |
832 | * Purpose: Find out the highest seen message from the server. | |
833 | * | |
834 | * Arguments: | |
835 | * server The server. | |
836 | * | |
837 | * Return value: If successful, the highest seen message, which is | |
838 | * greater than or equal to 0. Otherwise, a negative number with | |
839 | * the error explained in pop_error. | |
840 | * | |
841 | * Side effects: Closes the connection on error. | |
842 | */ | |
843 | int | |
873fbd0b | 844 | pop_last (popserver server) |
9c0f2dac RS |
845 | { |
846 | char *fromserver; | |
80b2cbf2 | 847 | |
9c0f2dac RS |
848 | if (server->in_multi) |
849 | { | |
850 | strcpy (pop_error, "In multi-line query in pop_last"); | |
851 | return (-1); | |
852 | } | |
853 | ||
854 | if (sendline (server, "LAST")) | |
855 | return (-1); | |
856 | ||
60b0a379 | 857 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
858 | return (-1); |
859 | ||
860 | if (! strncmp (fromserver, "-ERR", 4)) | |
861 | { | |
862 | strncpy (pop_error, fromserver, ERROR_MAX); | |
863 | return (-1); | |
864 | } | |
865 | else if (strncmp (fromserver, "+OK ", 4)) | |
866 | { | |
867 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
868 | pop_trash (server); | |
869 | return (-1); | |
870 | } | |
871 | else | |
872 | { | |
0b074993 CY |
873 | char *end_ptr; |
874 | int count; | |
875 | errno = 0; | |
876 | count = strtol (&fromserver[4], &end_ptr, 10); | |
59a431d6 | 877 | if (fromserver + 4 == end_ptr || errno) |
0b074993 CY |
878 | { |
879 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
880 | pop_trash (server); | |
881 | return (-1); | |
882 | } | |
883 | return count; | |
9c0f2dac RS |
884 | } |
885 | } | |
886 | ||
887 | /* | |
888 | * Function: pop_reset | |
889 | * | |
890 | * Purpose: Reset the server to its initial connect state | |
891 | * | |
892 | * Arguments: | |
893 | * server The server. | |
894 | * | |
895 | * Return value: 0 for success, non-0 with error in pop_error | |
896 | * otherwise. | |
897 | * | |
898 | * Side effects: Closes the connection on error. | |
899 | */ | |
900 | int | |
873fbd0b | 901 | pop_reset (popserver server) |
9c0f2dac RS |
902 | { |
903 | if (pop_retrieve_flush (server)) | |
904 | { | |
905 | return (-1); | |
906 | } | |
907 | ||
908 | if (sendline (server, "RSET") || getok (server)) | |
909 | return (-1); | |
910 | ||
911 | return (0); | |
912 | } | |
913 | ||
914 | /* | |
915 | * Function: pop_quit | |
916 | * | |
917 | * Purpose: Quit the connection to the server, | |
918 | * | |
919 | * Arguments: | |
920 | * server The server to quit. | |
921 | * | |
922 | * Return value: 0 for success, non-zero otherwise with error in | |
923 | * pop_error. | |
924 | * | |
8e6208c5 | 925 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
926 | * function is called, even if an error occurs. |
927 | */ | |
928 | int | |
873fbd0b | 929 | pop_quit (popserver server) |
9c0f2dac RS |
930 | { |
931 | int ret = 0; | |
932 | ||
933 | if (server->file >= 0) | |
934 | { | |
935 | if (pop_retrieve_flush (server)) | |
936 | { | |
937 | ret = -1; | |
938 | } | |
939 | ||
940 | if (sendline (server, "QUIT") || getok (server)) | |
941 | { | |
942 | ret = -1; | |
943 | } | |
944 | ||
945 | close (server->file); | |
946 | } | |
947 | ||
c2cd06e6 | 948 | free (server->buffer); |
9c0f2dac RS |
949 | free ((char *) server); |
950 | ||
951 | return (ret); | |
952 | } | |
953 | ||
c2668a61 RS |
954 | #ifdef WINDOWSNT |
955 | static int have_winsock = 0; | |
956 | #endif | |
957 | ||
9c0f2dac RS |
958 | /* |
959 | * Function: socket_connection | |
960 | * | |
961 | * Purpose: Opens the network connection with the mail host, without | |
962 | * doing any sort of I/O with it or anything. | |
963 | * | |
964 | * Arguments: | |
965 | * host The host to which to connect. | |
966 | * flags Option flags. | |
80b2cbf2 | 967 | * |
9c0f2dac RS |
968 | * Return value: A file descriptor indicating the connection, or -1 |
969 | * indicating failure, in which case an error has been copied | |
970 | * into pop_error. | |
971 | */ | |
972 | static int | |
873fbd0b | 973 | socket_connection (char *host, int flags) |
9c0f2dac | 974 | { |
33a2a872 JD |
975 | #ifdef HAVE_GETADDRINFO |
976 | struct addrinfo *res, *it; | |
977 | struct addrinfo hints; | |
978 | int ret; | |
979 | #else /* !HAVE_GETADDRINFO */ | |
9c0f2dac | 980 | struct hostent *hostent; |
33a2a872 | 981 | #endif |
9c0f2dac RS |
982 | struct servent *servent; |
983 | struct sockaddr_in addr; | |
984 | char found_port = 0; | |
988e88ab | 985 | const char *service; |
9c0f2dac | 986 | int sock; |
ee15f312 | 987 | char *realhost; |
9c0f2dac | 988 | #ifdef KERBEROS |
a27738b6 | 989 | #ifdef KERBEROS5 |
9c0f2dac | 990 | krb5_error_code rem; |
a27738b6 RS |
991 | krb5_context kcontext = 0; |
992 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
993 | krb5_ccache ccdef; |
994 | krb5_principal client, server; | |
995 | krb5_error *err_ret; | |
996 | register char *cp; | |
997 | #else | |
998 | KTEXT ticket; | |
999 | MSG_DAT msg_data; | |
1000 | CREDENTIALS cred; | |
1001 | Key_schedule schedule; | |
1002 | int rem; | |
a27738b6 | 1003 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1004 | #endif /* KERBEROS */ |
1005 | ||
1006 | int try_count = 0; | |
33a2a872 | 1007 | int connect_ok; |
9c0f2dac | 1008 | |
c2668a61 RS |
1009 | #ifdef WINDOWSNT |
1010 | { | |
1011 | WSADATA winsockData; | |
1012 | if (WSAStartup (0x101, &winsockData) == 0) | |
1013 | have_winsock = 1; | |
1014 | } | |
1015 | #endif | |
1016 | ||
72af86bd | 1017 | memset (&addr, 0, sizeof (addr)); |
9c0f2dac RS |
1018 | addr.sin_family = AF_INET; |
1019 | ||
81264b38 | 1020 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1021 | #ifdef KERBEROS |
1022 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1023 | #else | |
1024 | service = POP_SERVICE; | |
1025 | #endif | |
1026 | ||
1027 | #ifdef HESIOD | |
1028 | if (! (flags & POP_NO_HESIOD)) | |
1029 | { | |
1030 | servent = hes_getservbyname (service, "tcp"); | |
1031 | if (servent) | |
1032 | { | |
1033 | addr.sin_port = servent->s_port; | |
1034 | found_port = 1; | |
1035 | } | |
1036 | } | |
1037 | #endif | |
1038 | if (! found_port) | |
1039 | { | |
1040 | servent = getservbyname (service, "tcp"); | |
1041 | if (servent) | |
1042 | { | |
1043 | addr.sin_port = servent->s_port; | |
1044 | } | |
1045 | else | |
1046 | { | |
81264b38 | 1047 | /** "kpop" service is never used: look for 20060515 to see why **/ |
9c0f2dac RS |
1048 | #ifdef KERBEROS |
1049 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1050 | POP_PORT : KPOP_PORT); | |
1051 | #else | |
1052 | addr.sin_port = htons (POP_PORT); | |
1053 | #endif | |
1054 | } | |
1055 | } | |
1056 | ||
a27738b6 | 1057 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1058 | |
1059 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1060 | if (sock < 0) | |
1061 | { | |
a27738b6 | 1062 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1063 | strncat (pop_error, strerror (errno), |
a27738b6 | 1064 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac | 1065 | return (-1); |
80b2cbf2 | 1066 | |
9c0f2dac RS |
1067 | } |
1068 | ||
33a2a872 JD |
1069 | #ifdef HAVE_GETADDRINFO |
1070 | memset (&hints, 0, sizeof(hints)); | |
1071 | hints.ai_socktype = SOCK_STREAM; | |
7291159e | 1072 | hints.ai_flags = AI_CANONNAME; |
33a2a872 JD |
1073 | hints.ai_family = AF_INET; |
1074 | do | |
1075 | { | |
1076 | ret = getaddrinfo (host, service, &hints, &res); | |
1077 | try_count++; | |
1078 | if (ret != 0 && (ret != EAI_AGAIN || try_count == 5)) | |
1079 | { | |
1080 | strcpy (pop_error, "Could not determine POP server's address"); | |
1081 | return (-1); | |
1082 | } | |
1083 | } while (ret != 0); | |
1084 | ||
1085 | if (ret == 0) | |
1086 | { | |
1087 | it = res; | |
1088 | while (it) | |
1089 | { | |
1090 | if (it->ai_addrlen == sizeof (addr)) | |
1091 | { | |
1092 | struct sockaddr_in *in_a = (struct sockaddr_in *) it->ai_addr; | |
72af86bd | 1093 | memcpy (&addr.sin_addr, &in_a->sin_addr, sizeof (addr.sin_addr)); |
33a2a872 JD |
1094 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1095 | break; | |
1096 | } | |
1097 | it = it->ai_next; | |
1098 | } | |
1099 | connect_ok = it != NULL; | |
ee15f312 JD |
1100 | if (connect_ok) |
1101 | { | |
1102 | realhost = alloca (strlen (it->ai_canonname) + 1); | |
1103 | strcpy (realhost, it->ai_canonname); | |
1104 | } | |
33a2a872 JD |
1105 | freeaddrinfo (res); |
1106 | } | |
1107 | #else /* !HAVE_GETADDRINFO */ | |
b72f3bcb EZ |
1108 | do |
1109 | { | |
1110 | hostent = gethostbyname (host); | |
1111 | try_count++; | |
1112 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1113 | { | |
1114 | strcpy (pop_error, "Could not determine POP server's address"); | |
1115 | return (-1); | |
1116 | } | |
1117 | } while (! hostent); | |
1118 | ||
9c0f2dac RS |
1119 | while (*hostent->h_addr_list) |
1120 | { | |
72af86bd | 1121 | memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length); |
9c0f2dac RS |
1122 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) |
1123 | break; | |
1124 | hostent->h_addr_list++; | |
1125 | } | |
33a2a872 | 1126 | connect_ok = *hostent->h_addr_list != NULL; |
ee15f312 JD |
1127 | if (! connect_ok) |
1128 | { | |
1129 | realhost = alloca (strlen (hostent->h_name) + 1); | |
1130 | strcpy (realhost, hostent->h_name); | |
1131 | } | |
1132 | ||
33a2a872 | 1133 | #endif /* !HAVE_GETADDRINFO */ |
9c0f2dac RS |
1134 | |
1135 | #define CONNECT_ERROR "Could not connect to POP server: " | |
80b2cbf2 | 1136 | |
33a2a872 | 1137 | if (! connect_ok) |
9c0f2dac | 1138 | { |
de5c39cf | 1139 | CLOSESOCKET (sock); |
9c0f2dac RS |
1140 | strcpy (pop_error, CONNECT_ERROR); |
1141 | strncat (pop_error, strerror (errno), | |
1142 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1143 | return (-1); | |
80b2cbf2 | 1144 | |
9c0f2dac RS |
1145 | } |
1146 | ||
1147 | #ifdef KERBEROS | |
33a2a872 | 1148 | |
9c0f2dac RS |
1149 | #define KRB_ERROR "Kerberos error connecting to POP server: " |
1150 | if (! (flags & POP_NO_KERBEROS)) | |
1151 | { | |
a27738b6 RS |
1152 | #ifdef KERBEROS5 |
1153 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1154 | { |
1155 | krb5error: | |
a27738b6 RS |
1156 | if (auth_context) |
1157 | krb5_auth_con_free (kcontext, auth_context); | |
1158 | if (kcontext) | |
1159 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1160 | strcpy (pop_error, KRB_ERROR); |
1161 | strncat (pop_error, error_message (rem), | |
1162 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1163 | CLOSESOCKET (sock); |
9c0f2dac RS |
1164 | return (-1); |
1165 | } | |
1166 | ||
a27738b6 RS |
1167 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1168 | goto krb5error; | |
80b2cbf2 | 1169 | |
a27738b6 RS |
1170 | if (rem = krb5_cc_default (kcontext, &ccdef)) |
1171 | goto krb5error; | |
1172 | ||
1173 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1174 | goto krb5error; | |
9c0f2dac | 1175 | |
33a2a872 | 1176 | for (cp = realhost; *cp; cp++) |
9c0f2dac RS |
1177 | { |
1178 | if (isupper (*cp)) | |
1179 | { | |
1180 | *cp = tolower (*cp); | |
1181 | } | |
1182 | } | |
1183 | ||
33a2a872 | 1184 | if (rem = krb5_sname_to_principal (kcontext, realhost, |
a27738b6 RS |
1185 | POP_SERVICE, FALSE, &server)) |
1186 | goto krb5error; | |
9c0f2dac | 1187 | |
a27738b6 RS |
1188 | rem = krb5_sendauth (kcontext, &auth_context, |
1189 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1190 | AP_OPTS_MUTUAL_REQUIRED, |
1191 | 0, /* no checksum */ | |
1192 | 0, /* no creds, use ccache instead */ | |
1193 | ccdef, | |
9c0f2dac | 1194 | &err_ret, |
a27738b6 | 1195 | 0, /* don't need subsession key */ |
9c0f2dac | 1196 | 0); /* don't need reply */ |
a27738b6 | 1197 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1198 | if (rem) |
1199 | { | |
5fe92a72 CY |
1200 | strcpy (pop_error, KRB_ERROR); |
1201 | strncat (pop_error, error_message (rem), | |
1202 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1203 | #if defined HAVE_KRB5_ERROR_TEXT | |
9c0f2dac RS |
1204 | if (err_ret && err_ret->text.length) |
1205 | { | |
9c0f2dac RS |
1206 | strncat (pop_error, " [server says '", |
1207 | ERROR_MAX - strlen (pop_error) - 1); | |
1208 | strncat (pop_error, err_ret->text.data, | |
1209 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1210 | err_ret->text.length)); | |
1211 | strncat (pop_error, "']", | |
1212 | ERROR_MAX - strlen (pop_error) - 1); | |
1213 | } | |
5fe92a72 CY |
1214 | #elif defined HAVE_KRB5_ERROR_E_TEXT |
1215 | if (err_ret && err_ret->e_text && strlen(*err_ret->e_text)) | |
9c0f2dac | 1216 | { |
5fe92a72 CY |
1217 | strncat (pop_error, " [server says '", |
1218 | ERROR_MAX - strlen (pop_error) - 1); | |
1219 | strncat (pop_error, *err_ret->e_text, | |
1220 | ERROR_MAX - strlen (pop_error) - 1); | |
1221 | strncat (pop_error, "']", | |
1222 | ERROR_MAX - strlen (pop_error) - 1); | |
9c0f2dac | 1223 | } |
5fe92a72 | 1224 | #endif |
9c0f2dac | 1225 | if (err_ret) |
a27738b6 RS |
1226 | krb5_free_error (kcontext, err_ret); |
1227 | krb5_auth_con_free (kcontext, auth_context); | |
1228 | krb5_free_context (kcontext); | |
9c0f2dac | 1229 | |
de5c39cf | 1230 | CLOSESOCKET (sock); |
9c0f2dac RS |
1231 | return (-1); |
1232 | } | |
80b2cbf2 | 1233 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1234 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1235 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, |
1236 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1237 | (unsigned long) 0, &msg_data, &cred, schedule, |
1238 | (struct sockaddr_in *) 0, | |
1239 | (struct sockaddr_in *) 0, | |
1240 | "KPOPV0.1"); | |
1241 | free ((char *) ticket); | |
1242 | if (rem != KSUCCESS) | |
1243 | { | |
1244 | strcpy (pop_error, KRB_ERROR); | |
1245 | strncat (pop_error, krb_err_txt[rem], | |
1246 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1247 | CLOSESOCKET (sock); |
9c0f2dac RS |
1248 | return (-1); |
1249 | } | |
a27738b6 | 1250 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1251 | } |
1252 | #endif /* KERBEROS */ | |
1253 | ||
1254 | return (sock); | |
1255 | } /* socket_connection */ | |
1256 | ||
1257 | /* | |
60b0a379 | 1258 | * Function: pop_getline |
9c0f2dac RS |
1259 | * |
1260 | * Purpose: Get a line of text from the connection and return a | |
1261 | * pointer to it. The carriage return and linefeed at the end of | |
1262 | * the line are stripped, but periods at the beginnings of lines | |
1263 | * are NOT dealt with in any special way. | |
1264 | * | |
1265 | * Arguments: | |
1266 | * server The server from which to get the line of text. | |
1267 | * | |
d89d0243 KH |
1268 | * Returns: The number of characters in the line, which is returned in |
1269 | * LINE, not including the final null. A return value of 0 | |
1270 | * indicates a blank line. A negative return value indicates an | |
1271 | * error (in which case the contents of LINE are undefined. In | |
1272 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1273 | * |
60b0a379 | 1274 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1275 | * |
1276 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1277 | * |
1278 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1279 | */ |
d89d0243 | 1280 | static int |
873fbd0b | 1281 | pop_getline (popserver server, char **line) |
9c0f2dac RS |
1282 | { |
1283 | #define GETLINE_ERROR "Error reading from server: " | |
1284 | ||
1285 | int ret; | |
b6606ad8 RS |
1286 | int search_offset = 0; |
1287 | ||
9c0f2dac RS |
1288 | if (server->data) |
1289 | { | |
d89d0243 KH |
1290 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1291 | server->data); | |
9c0f2dac RS |
1292 | if (cp) |
1293 | { | |
1294 | int found; | |
1295 | int data_used; | |
1296 | ||
1297 | found = server->buffer_index; | |
1298 | data_used = (cp + 2) - server->buffer - found; | |
80b2cbf2 | 1299 | |
9c0f2dac RS |
1300 | *cp = '\0'; /* terminate the string to be returned */ |
1301 | server->data -= data_used; | |
1302 | server->buffer_index += data_used; | |
1303 | ||
1304 | if (pop_debug) | |
d89d0243 KH |
1305 | /* Embedded nulls will truncate this output prematurely, |
1306 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1307 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1308 | *line = server->buffer + found; |
1309 | return (data_used - 2); | |
9c0f2dac RS |
1310 | } |
1311 | else | |
1312 | { | |
72af86bd AS |
1313 | memmove (server->buffer, server->buffer + server->buffer_index, |
1314 | server->data); | |
b6606ad8 RS |
1315 | /* Record the fact that we've searched the data already in |
1316 | the buffer for a CRLF, so that when we search below, we | |
1317 | don't have to search the same data twice. There's a "- | |
1318 | 1" here to account for the fact that the last character | |
1319 | of the data we have may be the CR of a CRLF pair, of | |
1320 | which we haven't read the second half yet, so we may have | |
1321 | to search it again when we read more data. */ | |
1322 | search_offset = server->data - 1; | |
9c0f2dac RS |
1323 | server->buffer_index = 0; |
1324 | } | |
1325 | } | |
1326 | else | |
1327 | { | |
1328 | server->buffer_index = 0; | |
1329 | } | |
1330 | ||
1331 | while (1) | |
1332 | { | |
bbcac09c RS |
1333 | /* There's a "- 1" here to leave room for the null that we put |
1334 | at the end of the read data below. We put the null there so | |
1335 | that find_crlf knows where to stop when we call it. */ | |
1336 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1337 | { |
bbcac09c RS |
1338 | server->buffer_size += GETLINE_INCR; |
1339 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1340 | if (! server->buffer) | |
9c0f2dac | 1341 | { |
bbcac09c RS |
1342 | strcpy (pop_error, "Out of memory in pop_getline"); |
1343 | pop_trash (server); | |
1344 | return (-1); | |
0ea95737 | 1345 | } |
0ea95737 | 1346 | } |
bbcac09c RS |
1347 | ret = RECV (server->file, server->buffer + server->data, |
1348 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1349 | if (ret < 0) |
1350 | { | |
1351 | strcpy (pop_error, GETLINE_ERROR); | |
1352 | strncat (pop_error, strerror (errno), | |
1353 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1354 | pop_trash (server); | |
d89d0243 | 1355 | return (-1); |
9c0f2dac RS |
1356 | } |
1357 | else if (ret == 0) | |
1358 | { | |
60b0a379 | 1359 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1360 | pop_trash (server); |
d89d0243 | 1361 | return (-1); |
9c0f2dac RS |
1362 | } |
1363 | else | |
1364 | { | |
7a481e50 | 1365 | char *cp; |
9c0f2dac | 1366 | server->data += ret; |
7a481e50 | 1367 | server->buffer[server->data] = '\0'; |
80b2cbf2 | 1368 | |
d89d0243 KH |
1369 | cp = find_crlf (server->buffer + search_offset, |
1370 | server->data - search_offset); | |
9c0f2dac RS |
1371 | if (cp) |
1372 | { | |
1373 | int data_used = (cp + 2) - server->buffer; | |
1374 | *cp = '\0'; | |
1375 | server->data -= data_used; | |
1376 | server->buffer_index = data_used; | |
1377 | ||
1378 | if (pop_debug) | |
1379 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1380 | *line = server->buffer; |
1381 | return (data_used - 2); | |
9c0f2dac | 1382 | } |
a8f44d07 RS |
1383 | /* As above, the "- 1" here is to account for the fact that |
1384 | we may have read a CR without its accompanying LF. */ | |
1385 | search_offset += ret - 1; | |
9c0f2dac RS |
1386 | } |
1387 | } | |
1388 | ||
1389 | /* NOTREACHED */ | |
1390 | } | |
1391 | ||
1392 | /* | |
1393 | * Function: sendline | |
1394 | * | |
1395 | * Purpose: Sends a line of text to the POP server. The line of text | |
1396 | * passed into this function should NOT have the carriage return | |
1397 | * and linefeed on the end of it. Periods at beginnings of lines | |
1398 | * will NOT be treated specially by this function. | |
1399 | * | |
1400 | * Arguments: | |
1401 | * server The server to which to send the text. | |
1402 | * line The line of text to send. | |
1403 | * | |
1404 | * Return value: Upon successful completion, a value of 0 will be | |
1405 | * returned. Otherwise, a non-zero value will be returned, and | |
1406 | * an error will be copied into pop_error. | |
1407 | * | |
1408 | * Side effects: Closes the connection on error. | |
1409 | */ | |
1410 | static int | |
988e88ab | 1411 | sendline (popserver server, const char *line) |
9c0f2dac RS |
1412 | { |
1413 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1414 | int ret; | |
ec641d50 KR |
1415 | char *buf; |
1416 | ||
1417 | /* Combine the string and the CR-LF into one buffer. Otherwise, two | |
1418 | reasonable network stack optimizations, Nagle's algorithm and | |
1419 | delayed acks, combine to delay us a fraction of a second on every | |
1420 | message we send. (Movemail writes line without \r\n, client | |
1421 | kernel sends packet, server kernel delays the ack to see if it | |
1422 | can combine it with data, movemail writes \r\n, client kernel | |
1423 | waits because it has unacked data already in its outgoing queue, | |
1424 | client kernel eventually times out and sends.) | |
1425 | ||
1426 | This can be something like 0.2s per command, which can add up | |
1427 | over a few dozen messages, and is a big chunk of the time we | |
1428 | spend fetching mail from a server close by. */ | |
1429 | buf = alloca (strlen (line) + 3); | |
1430 | strcpy (buf, line); | |
1431 | strcat (buf, "\r\n"); | |
1432 | ret = fullwrite (server->file, buf, strlen (buf)); | |
9c0f2dac RS |
1433 | |
1434 | if (ret < 0) | |
1435 | { | |
1436 | pop_trash (server); | |
1437 | strcpy (pop_error, SENDLINE_ERROR); | |
1438 | strncat (pop_error, strerror (errno), | |
1439 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1440 | return (ret); | |
1441 | } | |
1442 | ||
1443 | if (pop_debug) | |
1444 | fprintf (stderr, ">>> %s\n", line); | |
1445 | ||
1446 | return (0); | |
1447 | } | |
1448 | ||
1449 | /* | |
1450 | * Procedure: fullwrite | |
1451 | * | |
1452 | * Purpose: Just like write, but keeps trying until the entire string | |
1453 | * has been written. | |
1454 | * | |
1455 | * Return value: Same as write. Pop_error is not set. | |
1456 | */ | |
1457 | static int | |
873fbd0b | 1458 | fullwrite (int fd, char *buf, int nbytes) |
9c0f2dac RS |
1459 | { |
1460 | char *cp; | |
9d3f4cee | 1461 | int ret = 0; |
9c0f2dac RS |
1462 | |
1463 | cp = buf; | |
9d3f4cee | 1464 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1465 | { |
1466 | cp += ret; | |
1467 | nbytes -= ret; | |
1468 | } | |
1469 | ||
1470 | return (ret); | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Procedure getok | |
1475 | * | |
1476 | * Purpose: Reads a line from the server. If the return indicator is | |
1477 | * positive, return with a zero exit status. If not, return with | |
1478 | * a negative exit status. | |
1479 | * | |
1480 | * Arguments: | |
1481 | * server The server to read from. | |
80b2cbf2 | 1482 | * |
9c0f2dac RS |
1483 | * Returns: 0 for success, else for failure and puts error in pop_error. |
1484 | * | |
8e6208c5 | 1485 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1486 | */ |
1487 | static int | |
873fbd0b | 1488 | getok (popserver server) |
9c0f2dac RS |
1489 | { |
1490 | char *fromline; | |
1491 | ||
60b0a379 | 1492 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1493 | { |
1494 | return (-1); | |
1495 | } | |
1496 | ||
1497 | if (! strncmp (fromline, "+OK", 3)) | |
1498 | return (0); | |
1499 | else if (! strncmp (fromline, "-ERR", 4)) | |
1500 | { | |
1501 | strncpy (pop_error, fromline, ERROR_MAX); | |
1502 | pop_error[ERROR_MAX-1] = '\0'; | |
1503 | return (-1); | |
1504 | } | |
1505 | else | |
1506 | { | |
1507 | strcpy (pop_error, | |
1508 | "Unexpected response from server; expecting +OK or -ERR"); | |
1509 | pop_trash (server); | |
1510 | return (-1); | |
1511 | } | |
80b2cbf2 | 1512 | } |
9c0f2dac RS |
1513 | |
1514 | #if 0 | |
1515 | /* | |
1516 | * Function: gettermination | |
1517 | * | |
1518 | * Purpose: Gets the next line and verifies that it is a termination | |
1519 | * line (nothing but a dot). | |
1520 | * | |
1521 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1522 | * | |
1523 | * Side effects: Closes the connection on error. | |
1524 | */ | |
1525 | static int | |
1526 | gettermination (server) | |
1527 | popserver server; | |
1528 | { | |
1529 | char *fromserver; | |
1530 | ||
60b0a379 | 1531 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1532 | return (-1); |
1533 | ||
1534 | if (strcmp (fromserver, ".")) | |
1535 | { | |
1536 | strcpy (pop_error, | |
1537 | "Unexpected response from server in gettermination"); | |
1538 | pop_trash (server); | |
1539 | return (-1); | |
1540 | } | |
1541 | ||
1542 | return (0); | |
1543 | } | |
1544 | #endif | |
1545 | ||
1546 | /* | |
1547 | * Function pop_close | |
1548 | * | |
1549 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1550 | * preserve any changes that were made and a "QUIT" command to | |
1551 | * try to get the server to quit, but ignoring any responses that | |
1552 | * are received. | |
1553 | * | |
8e6208c5 | 1554 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1555 | * Changes made to the maildrop since the session was started (or |
1556 | * since the last pop_reset) may be lost. | |
1557 | */ | |
80b2cbf2 | 1558 | void |
873fbd0b | 1559 | pop_close (popserver server) |
9c0f2dac RS |
1560 | { |
1561 | pop_trash (server); | |
1562 | free ((char *) server); | |
1563 | ||
1564 | return; | |
1565 | } | |
1566 | ||
1567 | /* | |
1568 | * Function: pop_trash | |
1569 | * | |
1570 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
4d90eee4 | 1571 | * memory associated with the server. It is valid to call |
9c0f2dac RS |
1572 | * pop_close or pop_quit after this function has been called. |
1573 | */ | |
1574 | static void | |
873fbd0b | 1575 | pop_trash (popserver server) |
9c0f2dac RS |
1576 | { |
1577 | if (server->file >= 0) | |
1578 | { | |
c2668a61 RS |
1579 | /* avoid recursion; sendline can call pop_trash */ |
1580 | if (server->trash_started) | |
1581 | return; | |
1582 | server->trash_started = 1; | |
de5c39cf | 1583 | |
9c0f2dac RS |
1584 | sendline (server, "RSET"); |
1585 | sendline (server, "QUIT"); | |
1586 | ||
de5c39cf | 1587 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1588 | server->file = -1; |
1589 | if (server->buffer) | |
1590 | { | |
1591 | free (server->buffer); | |
1592 | server->buffer = 0; | |
1593 | } | |
1594 | } | |
c2668a61 RS |
1595 | |
1596 | #ifdef WINDOWSNT | |
1597 | if (have_winsock) | |
1598 | WSACleanup (); | |
1599 | #endif | |
9c0f2dac RS |
1600 | } |
1601 | ||
d89d0243 KH |
1602 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1603 | embedded nulls and has LEN characters in it not including the final | |
1604 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1605 | |
1606 | static char * | |
873fbd0b | 1607 | find_crlf (char *in_string, int len) |
9c0f2dac | 1608 | { |
d89d0243 | 1609 | while (len--) |
9c0f2dac | 1610 | { |
d89d0243 | 1611 | if (*in_string == '\r') |
8148baf9 RS |
1612 | { |
1613 | if (*++in_string == '\n') | |
1614 | return (in_string - 1); | |
1615 | } | |
1616 | else | |
1617 | in_string++; | |
9c0f2dac | 1618 | } |
d89d0243 | 1619 | return (0); |
9c0f2dac RS |
1620 | } |
1621 | ||
1622 | #endif /* MAIL_USE_POP */ |