Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
4ee9629e | 2 | Copyright (c) 1991, 1993, 1996, 1997, 1999 Free Software Foundation, Inc. |
9c0f2dac RS |
3 | Written by Jonathan Kamens, jik@security.ov.com. |
4 | ||
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
9c0f2dac | 21 | |
8148baf9 RS |
22 | #ifdef HAVE_CONFIG_H |
23 | #define NO_SHORTNAMES /* Tell config not to load remap.h */ | |
c9c3d8f6 | 24 | #include <../src/config.h> |
8148baf9 RS |
25 | #else |
26 | #define MAIL_USE_POP | |
27 | #endif | |
c9c3d8f6 | 28 | |
8148baf9 RS |
29 | #ifdef MAIL_USE_POP |
30 | ||
9c0f2dac | 31 | #include <sys/types.h> |
c2668a61 RS |
32 | #ifdef WINDOWSNT |
33 | #include "ntlib.h" | |
34 | #include <winsock.h> | |
35 | #undef SOCKET_ERROR | |
de5c39cf RS |
36 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
37 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
38 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 39 | #else |
9c0f2dac RS |
40 | #include <netinet/in.h> |
41 | #include <sys/socket.h> | |
de5c39cf RS |
42 | #define RECV(s,buf,len,flags) read(s,buf,len) |
43 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
44 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 45 | #endif |
9c0f2dac | 46 | #include <pop.h> |
625ad89f | 47 | |
9c0f2dac RS |
48 | #ifdef sun |
49 | #include <malloc.h> | |
8148baf9 | 50 | #endif /* sun */ |
625ad89f | 51 | |
9c0f2dac RS |
52 | #ifdef HESIOD |
53 | #include <hesiod.h> | |
54 | /* | |
55 | * It really shouldn't be necessary to put this declaration here, but | |
56 | * the version of hesiod.h that Athena has installed in release 7.2 | |
57 | * doesn't declare this function; I don't know if the 7.3 version of | |
58 | * hesiod.h does. | |
59 | */ | |
60 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
61 | #endif | |
625ad89f | 62 | |
9c0f2dac | 63 | #include <pwd.h> |
9c0f2dac RS |
64 | #include <netdb.h> |
65 | #include <errno.h> | |
66 | #include <stdio.h> | |
a27738b6 RS |
67 | #ifdef STDC_HEADERS |
68 | #include <string.h> | |
020d3015 KH |
69 | #define index strchr |
70 | #endif | |
020d3015 KH |
71 | #ifdef HAVE_UNISTD_H |
72 | #include <unistd.h> | |
a27738b6 | 73 | #endif |
625ad89f | 74 | |
9c0f2dac | 75 | #ifdef KERBEROS |
a27738b6 RS |
76 | # ifdef HAVE_KRB5_H |
77 | # include <krb5.h> | |
78 | # endif | |
79 | # ifdef HAVE_DES_H | |
80 | # include <des.h> | |
81 | # else | |
82 | # ifdef HAVE_KERBEROSIV_DES_H | |
83 | # include <kerberosIV/des.h> | |
84 | # else | |
85 | # ifdef HAVE_KERBEROS_DES_H | |
86 | # include <kerberos/des.h> | |
87 | # endif | |
88 | # endif | |
89 | # endif | |
90 | # ifdef HAVE_KRB_H | |
91 | # include <krb.h> | |
92 | # else | |
93 | # ifdef HAVE_KERBEROSIV_KRB_H | |
94 | # include <kerberosIV/krb.h> | |
95 | # else | |
96 | # ifdef HAVE_KERBEROS_KRB_H | |
97 | # include <kerberos/krb.h> | |
98 | # endif | |
99 | # endif | |
100 | # endif | |
101 | # ifdef HAVE_COM_ERR_H | |
102 | # include <com_err.h> | |
103 | # endif | |
8148baf9 | 104 | #endif /* KERBEROS */ |
9c0f2dac | 105 | |
8148baf9 | 106 | #ifdef KERBEROS |
a27738b6 | 107 | #ifndef KERBEROS5 |
9c0f2dac | 108 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
109 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
110 | struct sockaddr_in *, struct sockaddr_in *, | |
111 | char * */); | |
9c0f2dac | 112 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 113 | #endif /* ! KERBEROS5 */ |
8148baf9 | 114 | #endif /* KERBEROS */ |
9c0f2dac | 115 | |
c2668a61 | 116 | #ifndef WINDOWSNT |
8148baf9 | 117 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
118 | extern int h_errno; |
119 | #endif | |
c2668a61 | 120 | #endif |
9c0f2dac | 121 | |
d89d0243 KH |
122 | #ifndef _P |
123 | # ifdef __STDC__ | |
124 | # define _P(a) a | |
125 | # else | |
126 | # define _P(a) () | |
127 | # endif /* __STDC__ */ | |
128 | #endif /* ! __P */ | |
129 | ||
130 | static int socket_connection _P((char *, int)); | |
60b0a379 | 131 | static int pop_getline _P((popserver, char **)); |
d89d0243 KH |
132 | static int sendline _P((popserver, char *)); |
133 | static int fullwrite _P((int, char *, int)); | |
134 | static int getok _P((popserver)); | |
9c0f2dac | 135 | #if 0 |
d89d0243 | 136 | static int gettermination _P((popserver)); |
9c0f2dac | 137 | #endif |
d89d0243 KH |
138 | static void pop_trash _P((popserver)); |
139 | static char *find_crlf _P((char *, int)); | |
7a481e50 | 140 | |
5bf244f1 DL |
141 | #define ERROR_MAX 160 /* a pretty arbitrary size, but needs |
142 | to be bigger than the one-time 80 */ | |
9c0f2dac RS |
143 | #define POP_PORT 110 |
144 | #define KPOP_PORT 1109 | |
c2668a61 | 145 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ |
9c0f2dac | 146 | #ifdef KERBEROS |
9c0f2dac RS |
147 | #define KPOP_SERVICE "kpop" |
148 | #endif | |
9c0f2dac RS |
149 | |
150 | char pop_error[ERROR_MAX]; | |
151 | int pop_debug = 0; | |
152 | ||
153 | #ifndef min | |
154 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
155 | #endif | |
156 | ||
157 | /* | |
158 | * Function: pop_open (char *host, char *username, char *password, | |
159 | * int flags) | |
160 | * | |
161 | * Purpose: Establishes a connection with a post-office server, and | |
162 | * completes the authorization portion of the session. | |
163 | * | |
164 | * Arguments: | |
165 | * host The server host with which the connection should be | |
166 | * established. Optional. If omitted, internal | |
167 | * heuristics will be used to determine the server host, | |
168 | * if possible. | |
169 | * username | |
170 | * The username of the mail-drop to access. Optional. | |
171 | * If omitted, internal heuristics will be used to | |
172 | * determine the username, if possible. | |
173 | * password | |
174 | * The password to use for authorization. If omitted, | |
175 | * internal heuristics will be used to determine the | |
176 | * password, if possible. | |
177 | * flags A bit mask containing flags controlling certain | |
178 | * functions of the routine. Valid flags are defined in | |
179 | * the file pop.h | |
180 | * | |
181 | * Return value: Upon successful establishment of a connection, a | |
182 | * non-null popserver will be returned. Otherwise, null will be | |
183 | * returned, and the string variable pop_error will contain an | |
184 | * explanation of the error. | |
185 | */ | |
186 | popserver | |
187 | pop_open (host, username, password, flags) | |
188 | char *host; | |
189 | char *username; | |
190 | char *password; | |
191 | int flags; | |
192 | { | |
193 | int sock; | |
194 | popserver server; | |
195 | ||
196 | /* Determine the user name */ | |
197 | if (! username) | |
198 | { | |
199 | username = getenv ("USER"); | |
200 | if (! (username && *username)) | |
201 | { | |
202 | username = getlogin (); | |
203 | if (! (username && *username)) | |
204 | { | |
205 | struct passwd *passwd; | |
206 | passwd = getpwuid (getuid ()); | |
207 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
208 | { | |
209 | username = passwd->pw_name; | |
210 | } | |
211 | else | |
212 | { | |
213 | strcpy (pop_error, "Could not determine username"); | |
214 | return (0); | |
215 | } | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | /* | |
221 | * Determine the mail host. | |
222 | */ | |
223 | ||
224 | if (! host) | |
225 | { | |
226 | host = getenv ("MAILHOST"); | |
227 | } | |
228 | ||
229 | #ifdef HESIOD | |
230 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
231 | { | |
232 | struct hes_postoffice *office; | |
233 | office = hes_getmailhost (username); | |
234 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
235 | && office->po_name && *office->po_name && office->po_host | |
236 | && *office->po_host) | |
237 | { | |
238 | host = office->po_host; | |
239 | username = office->po_name; | |
240 | } | |
241 | } | |
242 | #endif | |
243 | ||
244 | #ifdef MAILHOST | |
245 | if (! host) | |
246 | { | |
247 | host = MAILHOST; | |
248 | } | |
249 | #endif | |
250 | ||
251 | if (! host) | |
252 | { | |
253 | strcpy (pop_error, "Could not determine POP server"); | |
254 | return (0); | |
255 | } | |
256 | ||
257 | /* Determine the password */ | |
bbcac09c RS |
258 | #ifdef KERBEROS |
259 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
9c0f2dac | 260 | #else |
bbcac09c | 261 | #define DONT_NEED_PASSWORD 0 |
9c0f2dac RS |
262 | #endif |
263 | ||
264 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
265 | { | |
266 | if (! (flags & POP_NO_GETPASS)) | |
267 | { | |
268 | password = getpass ("Enter POP password:"); | |
269 | } | |
270 | if (! password) | |
271 | { | |
272 | strcpy (pop_error, "Could not determine POP password"); | |
273 | return (0); | |
274 | } | |
275 | } | |
276 | if (password) | |
bbcac09c | 277 | flags |= POP_NO_KERBEROS; |
9c0f2dac RS |
278 | else |
279 | password = username; | |
280 | ||
281 | sock = socket_connection (host, flags); | |
282 | if (sock == -1) | |
283 | return (0); | |
284 | ||
285 | server = (popserver) malloc (sizeof (struct _popserver)); | |
286 | if (! server) | |
287 | { | |
288 | strcpy (pop_error, "Out of memory in pop_open"); | |
289 | return (0); | |
290 | } | |
291 | server->buffer = (char *) malloc (GETLINE_MIN); | |
292 | if (! server->buffer) | |
293 | { | |
294 | strcpy (pop_error, "Out of memory in pop_open"); | |
295 | free ((char *) server); | |
296 | return (0); | |
297 | } | |
298 | ||
299 | server->file = sock; | |
300 | server->data = 0; | |
301 | server->buffer_index = 0; | |
302 | server->buffer_size = GETLINE_MIN; | |
303 | server->in_multi = 0; | |
c2668a61 | 304 | server->trash_started = 0; |
9c0f2dac RS |
305 | |
306 | if (getok (server)) | |
307 | return (0); | |
308 | ||
309 | /* | |
310 | * I really shouldn't use the pop_error variable like this, but.... | |
311 | */ | |
312 | if (strlen (username) > ERROR_MAX - 6) | |
313 | { | |
314 | pop_close (server); | |
315 | strcpy (pop_error, | |
316 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
317 | return (0); | |
318 | } | |
319 | sprintf (pop_error, "USER %s", username); | |
320 | ||
321 | if (sendline (server, pop_error) || getok (server)) | |
322 | { | |
323 | return (0); | |
324 | } | |
325 | ||
326 | if (strlen (password) > ERROR_MAX - 6) | |
327 | { | |
328 | pop_close (server); | |
329 | strcpy (pop_error, | |
330 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
331 | return (0); | |
332 | } | |
333 | sprintf (pop_error, "PASS %s", password); | |
334 | ||
335 | if (sendline (server, pop_error) || getok (server)) | |
336 | { | |
337 | return (0); | |
338 | } | |
339 | ||
340 | return (server); | |
341 | } | |
342 | ||
343 | /* | |
344 | * Function: pop_stat | |
345 | * | |
346 | * Purpose: Issue the STAT command to the server and return (in the | |
347 | * value parameters) the number of messages in the maildrop and | |
348 | * the total size of the maildrop. | |
349 | * | |
350 | * Return value: 0 on success, or non-zero with an error in pop_error | |
351 | * in failure. | |
352 | * | |
353 | * Side effects: On failure, may make further operations on the | |
354 | * connection impossible. | |
355 | */ | |
356 | int | |
357 | pop_stat (server, count, size) | |
358 | popserver server; | |
359 | int *count; | |
360 | int *size; | |
361 | { | |
362 | char *fromserver; | |
363 | ||
364 | if (server->in_multi) | |
365 | { | |
366 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
367 | return (-1); | |
368 | } | |
369 | ||
60b0a379 | 370 | if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0)) |
9c0f2dac RS |
371 | return (-1); |
372 | ||
373 | if (strncmp (fromserver, "+OK ", 4)) | |
374 | { | |
375 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
376 | { | |
377 | strncpy (pop_error, fromserver, ERROR_MAX); | |
378 | } | |
379 | else | |
380 | { | |
381 | strcpy (pop_error, | |
382 | "Unexpected response from POP server in pop_stat"); | |
383 | pop_trash (server); | |
384 | } | |
385 | return (-1); | |
386 | } | |
387 | ||
388 | *count = atoi (&fromserver[4]); | |
389 | ||
390 | fromserver = index (&fromserver[4], ' '); | |
391 | if (! fromserver) | |
392 | { | |
393 | strcpy (pop_error, | |
394 | "Badly formatted response from server in pop_stat"); | |
395 | pop_trash (server); | |
396 | return (-1); | |
397 | } | |
398 | ||
399 | *size = atoi (fromserver + 1); | |
400 | ||
401 | return (0); | |
402 | } | |
403 | ||
404 | /* | |
405 | * Function: pop_list | |
406 | * | |
407 | * Purpose: Performs the POP "list" command and returns (in value | |
408 | * parameters) two malloc'd zero-terminated arrays -- one of | |
409 | * message IDs, and a parallel one of sizes. | |
410 | * | |
411 | * Arguments: | |
412 | * server The pop connection to talk to. | |
413 | * message The number of the one message about which to get | |
414 | * information, or 0 to get information about all | |
415 | * messages. | |
416 | * | |
417 | * Return value: 0 on success, non-zero with error in pop_error on | |
418 | * failure. | |
419 | * | |
420 | * Side effects: On failure, may make further operations on the | |
421 | * connection impossible. | |
422 | */ | |
423 | int | |
424 | pop_list (server, message, IDs, sizes) | |
425 | popserver server; | |
426 | int message; | |
427 | int **IDs; | |
428 | int **sizes; | |
429 | { | |
430 | int how_many, i; | |
431 | char *fromserver; | |
432 | ||
433 | if (server->in_multi) | |
434 | { | |
435 | strcpy (pop_error, "In multi-line query in pop_list"); | |
436 | return (-1); | |
437 | } | |
438 | ||
439 | if (message) | |
440 | how_many = 1; | |
441 | else | |
442 | { | |
443 | int count, size; | |
444 | if (pop_stat (server, &count, &size)) | |
445 | return (-1); | |
446 | how_many = count; | |
447 | } | |
448 | ||
449 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
450 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
451 | if (! (*IDs && *sizes)) | |
452 | { | |
453 | strcpy (pop_error, "Out of memory in pop_list"); | |
454 | return (-1); | |
455 | } | |
456 | ||
457 | if (message) | |
458 | { | |
459 | sprintf (pop_error, "LIST %d", message); | |
460 | if (sendline (server, pop_error)) | |
461 | { | |
462 | free ((char *) *IDs); | |
463 | free ((char *) *sizes); | |
464 | return (-1); | |
465 | } | |
60b0a379 | 466 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
467 | { |
468 | free ((char *) *IDs); | |
469 | free ((char *) *sizes); | |
470 | return (-1); | |
471 | } | |
472 | if (strncmp (fromserver, "+OK ", 4)) | |
473 | { | |
474 | if (! strncmp (fromserver, "-ERR", 4)) | |
475 | strncpy (pop_error, fromserver, ERROR_MAX); | |
476 | else | |
477 | { | |
478 | strcpy (pop_error, | |
479 | "Unexpected response from server in pop_list"); | |
480 | pop_trash (server); | |
481 | } | |
482 | free ((char *) *IDs); | |
483 | free ((char *) *sizes); | |
484 | return (-1); | |
485 | } | |
486 | (*IDs)[0] = atoi (&fromserver[4]); | |
487 | fromserver = index (&fromserver[4], ' '); | |
488 | if (! fromserver) | |
489 | { | |
490 | strcpy (pop_error, | |
491 | "Badly formatted response from server in pop_list"); | |
492 | pop_trash (server); | |
493 | free ((char *) *IDs); | |
494 | free ((char *) *sizes); | |
495 | return (-1); | |
496 | } | |
497 | (*sizes)[0] = atoi (fromserver); | |
498 | (*IDs)[1] = (*sizes)[1] = 0; | |
499 | return (0); | |
500 | } | |
501 | else | |
502 | { | |
503 | if (pop_multi_first (server, "LIST", &fromserver)) | |
504 | { | |
505 | free ((char *) *IDs); | |
506 | free ((char *) *sizes); | |
507 | return (-1); | |
508 | } | |
509 | for (i = 0; i < how_many; i++) | |
510 | { | |
d89d0243 | 511 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
512 | { |
513 | free ((char *) *IDs); | |
514 | free ((char *) *sizes); | |
515 | return (-1); | |
516 | } | |
517 | (*IDs)[i] = atoi (fromserver); | |
518 | fromserver = index (fromserver, ' '); | |
519 | if (! fromserver) | |
520 | { | |
521 | strcpy (pop_error, | |
522 | "Badly formatted response from server in pop_list"); | |
523 | free ((char *) *IDs); | |
524 | free ((char *) *sizes); | |
525 | pop_trash (server); | |
526 | return (-1); | |
527 | } | |
528 | (*sizes)[i] = atoi (fromserver); | |
529 | } | |
d89d0243 | 530 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
531 | { |
532 | free ((char *) *IDs); | |
533 | free ((char *) *sizes); | |
534 | return (-1); | |
535 | } | |
536 | else if (fromserver) | |
537 | { | |
538 | strcpy (pop_error, | |
539 | "Too many response lines from server in pop_list"); | |
540 | free ((char *) *IDs); | |
541 | free ((char *) *sizes); | |
542 | return (-1); | |
543 | } | |
544 | (*IDs)[i] = (*sizes)[i] = 0; | |
545 | return (0); | |
546 | } | |
547 | } | |
548 | ||
549 | /* | |
550 | * Function: pop_retrieve | |
551 | * | |
552 | * Purpose: Retrieve a specified message from the maildrop. | |
553 | * | |
554 | * Arguments: | |
555 | * server The server to retrieve from. | |
556 | * message The message number to retrieve. | |
557 | * markfrom | |
558 | * If true, then mark the string "From " at the beginning | |
559 | * of lines with '>'. | |
d89d0243 KH |
560 | * msg_buf Output parameter to which a buffer containing the |
561 | * message is assigned. | |
9c0f2dac | 562 | * |
d89d0243 KH |
563 | * Return value: The number of bytes in msg_buf, which may contain |
564 | * embedded nulls, not including its final null, or -1 on error | |
565 | * with pop_error set. | |
9c0f2dac RS |
566 | * |
567 | * Side effects: May kill connection on error. | |
568 | */ | |
d89d0243 KH |
569 | int |
570 | pop_retrieve (server, message, markfrom, msg_buf) | |
9c0f2dac RS |
571 | popserver server; |
572 | int message; | |
573 | int markfrom; | |
d89d0243 | 574 | char **msg_buf; |
9c0f2dac RS |
575 | { |
576 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
577 | char *ptr, *fromserver; | |
578 | int ret; | |
579 | ||
580 | if (server->in_multi) | |
581 | { | |
582 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 583 | return (-1); |
9c0f2dac RS |
584 | } |
585 | ||
586 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 587 | return (-1); |
9c0f2dac RS |
588 | |
589 | if (pop_retrieve_first (server, message, &fromserver)) | |
590 | { | |
d89d0243 | 591 | return (-1); |
9c0f2dac RS |
592 | } |
593 | ||
594 | /* | |
595 | * The "5" below is an arbitrary constant -- I assume that if | |
596 | * there are "From" lines in the text to be marked, there | |
597 | * probably won't be more than 5 of them. If there are, I | |
598 | * allocate more space for them below. | |
599 | */ | |
600 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 601 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
602 | free ((char *) IDs); |
603 | free ((char *) sizes); | |
604 | ||
605 | if (! ptr) | |
606 | { | |
607 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
608 | pop_retrieve_flush (server); | |
d89d0243 | 609 | return (-1); |
9c0f2dac RS |
610 | } |
611 | ||
d89d0243 | 612 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 613 | { |
9c0f2dac RS |
614 | if (! fromserver) |
615 | { | |
616 | ptr[cp] = '\0'; | |
d89d0243 KH |
617 | *msg_buf = ptr; |
618 | return (cp); | |
9c0f2dac RS |
619 | } |
620 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
621 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
622 | fromserver[4] == ' ') | |
623 | { | |
624 | if (++fromcount == 5) | |
625 | { | |
626 | bufsize += 5; | |
7d665945 | 627 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
628 | if (! ptr) |
629 | { | |
630 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
631 | pop_retrieve_flush (server); | |
d89d0243 | 632 | return (-1); |
9c0f2dac RS |
633 | } |
634 | fromcount = 0; | |
635 | } | |
636 | ptr[cp++] = '>'; | |
637 | } | |
d89d0243 KH |
638 | bcopy (fromserver, &ptr[cp], ret); |
639 | cp += ret; | |
9c0f2dac RS |
640 | ptr[cp++] = '\n'; |
641 | } | |
642 | ||
d89d0243 KH |
643 | free (ptr); |
644 | return (-1); | |
9c0f2dac RS |
645 | } |
646 | ||
647 | int | |
648 | pop_retrieve_first (server, message, response) | |
649 | popserver server; | |
650 | int message; | |
651 | char **response; | |
652 | { | |
653 | sprintf (pop_error, "RETR %d", message); | |
654 | return (pop_multi_first (server, pop_error, response)); | |
655 | } | |
656 | ||
d89d0243 KH |
657 | /* |
658 | Returns a negative number on error, 0 to indicate that the data has | |
659 | all been read (i.e., the server has returned a "." termination | |
660 | line), or a positive number indicating the number of bytes in the | |
661 | returned buffer (which is null-terminated and may contain embedded | |
662 | nulls, but the returned bytecount doesn't include the final null). | |
663 | */ | |
664 | ||
9c0f2dac RS |
665 | int |
666 | pop_retrieve_next (server, line) | |
667 | popserver server; | |
668 | char **line; | |
669 | { | |
670 | return (pop_multi_next (server, line)); | |
671 | } | |
672 | ||
673 | int | |
674 | pop_retrieve_flush (server) | |
675 | popserver server; | |
676 | { | |
677 | return (pop_multi_flush (server)); | |
678 | } | |
679 | ||
680 | int | |
681 | pop_top_first (server, message, lines, response) | |
682 | popserver server; | |
683 | int message, lines; | |
684 | char **response; | |
685 | { | |
686 | sprintf (pop_error, "TOP %d %d", message, lines); | |
687 | return (pop_multi_first (server, pop_error, response)); | |
688 | } | |
689 | ||
d89d0243 KH |
690 | /* |
691 | Returns a negative number on error, 0 to indicate that the data has | |
692 | all been read (i.e., the server has returned a "." termination | |
693 | line), or a positive number indicating the number of bytes in the | |
694 | returned buffer (which is null-terminated and may contain embedded | |
695 | nulls, but the returned bytecount doesn't include the final null). | |
696 | */ | |
697 | ||
9c0f2dac RS |
698 | int |
699 | pop_top_next (server, line) | |
700 | popserver server; | |
701 | char **line; | |
702 | { | |
703 | return (pop_multi_next (server, line)); | |
704 | } | |
705 | ||
706 | int | |
707 | pop_top_flush (server) | |
708 | popserver server; | |
709 | { | |
710 | return (pop_multi_flush (server)); | |
711 | } | |
712 | ||
713 | int | |
714 | pop_multi_first (server, command, response) | |
715 | popserver server; | |
716 | char *command; | |
717 | char **response; | |
718 | { | |
719 | if (server->in_multi) | |
720 | { | |
721 | strcpy (pop_error, | |
722 | "Already in multi-line query in pop_multi_first"); | |
723 | return (-1); | |
724 | } | |
725 | ||
60b0a379 | 726 | if (sendline (server, command) || (pop_getline (server, response) < 0)) |
9c0f2dac RS |
727 | { |
728 | return (-1); | |
729 | } | |
730 | ||
731 | if (0 == strncmp (*response, "-ERR", 4)) | |
732 | { | |
733 | strncpy (pop_error, *response, ERROR_MAX); | |
734 | return (-1); | |
735 | } | |
736 | else if (0 == strncmp (*response, "+OK", 3)) | |
737 | { | |
738 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
739 | server->in_multi = 1; | |
740 | return (0); | |
741 | } | |
742 | else | |
743 | { | |
744 | strcpy (pop_error, | |
745 | "Unexpected response from server in pop_multi_first"); | |
746 | return (-1); | |
747 | } | |
748 | } | |
749 | ||
d89d0243 KH |
750 | /* |
751 | Read the next line of data from SERVER and place a pointer to it | |
752 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
753 | (i.e., the server has returned a line containing only "."), or a | |
754 | positive number indicating the number of bytes in the LINE buffer | |
755 | (not including the final null). The data in that buffer may contain | |
756 | embedded nulls, but does not contain the final CRLF. When returning | |
757 | 0, LINE is set to null. */ | |
758 | ||
9c0f2dac RS |
759 | int |
760 | pop_multi_next (server, line) | |
761 | popserver server; | |
762 | char **line; | |
763 | { | |
764 | char *fromserver; | |
d89d0243 | 765 | int ret; |
9c0f2dac RS |
766 | |
767 | if (! server->in_multi) | |
768 | { | |
769 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
770 | return (-1); | |
771 | } | |
772 | ||
60b0a379 | 773 | if ((ret = pop_getline (server, &fromserver)) < 0) |
9c0f2dac RS |
774 | { |
775 | return (-1); | |
776 | } | |
777 | ||
778 | if (fromserver[0] == '.') | |
779 | { | |
780 | if (! fromserver[1]) | |
781 | { | |
782 | *line = 0; | |
783 | server->in_multi = 0; | |
784 | return (0); | |
785 | } | |
786 | else | |
787 | { | |
788 | *line = fromserver + 1; | |
d89d0243 | 789 | return (ret - 1); |
9c0f2dac RS |
790 | } |
791 | } | |
792 | else | |
793 | { | |
794 | *line = fromserver; | |
d89d0243 | 795 | return (ret); |
9c0f2dac RS |
796 | } |
797 | } | |
798 | ||
799 | int | |
800 | pop_multi_flush (server) | |
801 | popserver server; | |
802 | { | |
803 | char *line; | |
d89d0243 | 804 | int ret; |
9c0f2dac RS |
805 | |
806 | if (! server->in_multi) | |
807 | { | |
808 | return (0); | |
809 | } | |
810 | ||
d89d0243 | 811 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 812 | { |
d89d0243 KH |
813 | if (ret < 0) |
814 | return (-1); | |
9c0f2dac RS |
815 | } |
816 | ||
d89d0243 | 817 | return (0); |
9c0f2dac RS |
818 | } |
819 | ||
820 | /* Function: pop_delete | |
821 | * | |
822 | * Purpose: Delete a specified message. | |
823 | * | |
824 | * Arguments: | |
825 | * server Server from which to delete the message. | |
826 | * message Message to delete. | |
827 | * | |
828 | * Return value: 0 on success, non-zero with error in pop_error | |
829 | * otherwise. | |
830 | */ | |
831 | int | |
832 | pop_delete (server, message) | |
833 | popserver server; | |
834 | int message; | |
835 | { | |
836 | if (server->in_multi) | |
837 | { | |
838 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
839 | return (-1); | |
840 | } | |
841 | ||
842 | sprintf (pop_error, "DELE %d", message); | |
843 | ||
844 | if (sendline (server, pop_error) || getok (server)) | |
845 | return (-1); | |
846 | ||
847 | return (0); | |
848 | } | |
849 | ||
850 | /* | |
851 | * Function: pop_noop | |
852 | * | |
853 | * Purpose: Send a noop command to the server. | |
854 | * | |
855 | * Argument: | |
856 | * server The server to send to. | |
857 | * | |
858 | * Return value: 0 on success, non-zero with error in pop_error | |
859 | * otherwise. | |
860 | * | |
861 | * Side effects: Closes connection on error. | |
862 | */ | |
863 | int | |
864 | pop_noop (server) | |
865 | popserver server; | |
866 | { | |
867 | if (server->in_multi) | |
868 | { | |
869 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
870 | return (-1); | |
871 | } | |
872 | ||
873 | if (sendline (server, "NOOP") || getok (server)) | |
874 | return (-1); | |
875 | ||
876 | return (0); | |
877 | } | |
878 | ||
879 | /* | |
880 | * Function: pop_last | |
881 | * | |
882 | * Purpose: Find out the highest seen message from the server. | |
883 | * | |
884 | * Arguments: | |
885 | * server The server. | |
886 | * | |
887 | * Return value: If successful, the highest seen message, which is | |
888 | * greater than or equal to 0. Otherwise, a negative number with | |
889 | * the error explained in pop_error. | |
890 | * | |
891 | * Side effects: Closes the connection on error. | |
892 | */ | |
893 | int | |
894 | pop_last (server) | |
895 | popserver server; | |
896 | { | |
897 | char *fromserver; | |
898 | ||
899 | if (server->in_multi) | |
900 | { | |
901 | strcpy (pop_error, "In multi-line query in pop_last"); | |
902 | return (-1); | |
903 | } | |
904 | ||
905 | if (sendline (server, "LAST")) | |
906 | return (-1); | |
907 | ||
60b0a379 | 908 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
909 | return (-1); |
910 | ||
911 | if (! strncmp (fromserver, "-ERR", 4)) | |
912 | { | |
913 | strncpy (pop_error, fromserver, ERROR_MAX); | |
914 | return (-1); | |
915 | } | |
916 | else if (strncmp (fromserver, "+OK ", 4)) | |
917 | { | |
918 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
919 | pop_trash (server); | |
920 | return (-1); | |
921 | } | |
922 | else | |
923 | { | |
924 | return (atoi (&fromserver[4])); | |
925 | } | |
926 | } | |
927 | ||
928 | /* | |
929 | * Function: pop_reset | |
930 | * | |
931 | * Purpose: Reset the server to its initial connect state | |
932 | * | |
933 | * Arguments: | |
934 | * server The server. | |
935 | * | |
936 | * Return value: 0 for success, non-0 with error in pop_error | |
937 | * otherwise. | |
938 | * | |
939 | * Side effects: Closes the connection on error. | |
940 | */ | |
941 | int | |
942 | pop_reset (server) | |
943 | popserver server; | |
944 | { | |
945 | if (pop_retrieve_flush (server)) | |
946 | { | |
947 | return (-1); | |
948 | } | |
949 | ||
950 | if (sendline (server, "RSET") || getok (server)) | |
951 | return (-1); | |
952 | ||
953 | return (0); | |
954 | } | |
955 | ||
956 | /* | |
957 | * Function: pop_quit | |
958 | * | |
959 | * Purpose: Quit the connection to the server, | |
960 | * | |
961 | * Arguments: | |
962 | * server The server to quit. | |
963 | * | |
964 | * Return value: 0 for success, non-zero otherwise with error in | |
965 | * pop_error. | |
966 | * | |
8e6208c5 | 967 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
968 | * function is called, even if an error occurs. |
969 | */ | |
970 | int | |
971 | pop_quit (server) | |
972 | popserver server; | |
973 | { | |
974 | int ret = 0; | |
975 | ||
976 | if (server->file >= 0) | |
977 | { | |
978 | if (pop_retrieve_flush (server)) | |
979 | { | |
980 | ret = -1; | |
981 | } | |
982 | ||
983 | if (sendline (server, "QUIT") || getok (server)) | |
984 | { | |
985 | ret = -1; | |
986 | } | |
987 | ||
988 | close (server->file); | |
989 | } | |
990 | ||
991 | if (server->buffer) | |
992 | free (server->buffer); | |
993 | free ((char *) server); | |
994 | ||
995 | return (ret); | |
996 | } | |
997 | ||
c2668a61 RS |
998 | #ifdef WINDOWSNT |
999 | static int have_winsock = 0; | |
1000 | #endif | |
1001 | ||
9c0f2dac RS |
1002 | /* |
1003 | * Function: socket_connection | |
1004 | * | |
1005 | * Purpose: Opens the network connection with the mail host, without | |
1006 | * doing any sort of I/O with it or anything. | |
1007 | * | |
1008 | * Arguments: | |
1009 | * host The host to which to connect. | |
1010 | * flags Option flags. | |
1011 | * | |
1012 | * Return value: A file descriptor indicating the connection, or -1 | |
1013 | * indicating failure, in which case an error has been copied | |
1014 | * into pop_error. | |
1015 | */ | |
1016 | static int | |
1017 | socket_connection (host, flags) | |
1018 | char *host; | |
1019 | int flags; | |
1020 | { | |
1021 | struct hostent *hostent; | |
1022 | struct servent *servent; | |
1023 | struct sockaddr_in addr; | |
1024 | char found_port = 0; | |
1025 | char *service; | |
1026 | int sock; | |
1027 | #ifdef KERBEROS | |
a27738b6 | 1028 | #ifdef KERBEROS5 |
9c0f2dac | 1029 | krb5_error_code rem; |
a27738b6 RS |
1030 | krb5_context kcontext = 0; |
1031 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
1032 | krb5_ccache ccdef; |
1033 | krb5_principal client, server; | |
1034 | krb5_error *err_ret; | |
1035 | register char *cp; | |
1036 | #else | |
1037 | KTEXT ticket; | |
1038 | MSG_DAT msg_data; | |
1039 | CREDENTIALS cred; | |
1040 | Key_schedule schedule; | |
1041 | int rem; | |
51a66525 | 1042 | char *realhost; |
a27738b6 | 1043 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1044 | #endif /* KERBEROS */ |
1045 | ||
1046 | int try_count = 0; | |
1047 | ||
c2668a61 RS |
1048 | #ifdef WINDOWSNT |
1049 | { | |
1050 | WSADATA winsockData; | |
1051 | if (WSAStartup (0x101, &winsockData) == 0) | |
1052 | have_winsock = 1; | |
1053 | } | |
1054 | #endif | |
1055 | ||
9c0f2dac RS |
1056 | do |
1057 | { | |
1058 | hostent = gethostbyname (host); | |
1059 | try_count++; | |
1060 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1061 | { | |
1062 | strcpy (pop_error, "Could not determine POP server's address"); | |
1063 | return (-1); | |
1064 | } | |
1065 | } while (! hostent); | |
1066 | ||
1067 | bzero ((char *) &addr, sizeof (addr)); | |
1068 | addr.sin_family = AF_INET; | |
1069 | ||
1070 | #ifdef KERBEROS | |
1071 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1072 | #else | |
1073 | service = POP_SERVICE; | |
1074 | #endif | |
1075 | ||
1076 | #ifdef HESIOD | |
1077 | if (! (flags & POP_NO_HESIOD)) | |
1078 | { | |
1079 | servent = hes_getservbyname (service, "tcp"); | |
1080 | if (servent) | |
1081 | { | |
1082 | addr.sin_port = servent->s_port; | |
1083 | found_port = 1; | |
1084 | } | |
1085 | } | |
1086 | #endif | |
1087 | if (! found_port) | |
1088 | { | |
1089 | servent = getservbyname (service, "tcp"); | |
1090 | if (servent) | |
1091 | { | |
1092 | addr.sin_port = servent->s_port; | |
1093 | } | |
1094 | else | |
1095 | { | |
1096 | #ifdef KERBEROS | |
1097 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1098 | POP_PORT : KPOP_PORT); | |
1099 | #else | |
1100 | addr.sin_port = htons (POP_PORT); | |
1101 | #endif | |
1102 | } | |
1103 | } | |
1104 | ||
a27738b6 | 1105 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1106 | |
1107 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1108 | if (sock < 0) | |
1109 | { | |
a27738b6 | 1110 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1111 | strncat (pop_error, strerror (errno), |
a27738b6 | 1112 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac RS |
1113 | return (-1); |
1114 | ||
1115 | } | |
1116 | ||
1117 | while (*hostent->h_addr_list) | |
1118 | { | |
1119 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1120 | hostent->h_length); | |
1121 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1122 | break; | |
1123 | hostent->h_addr_list++; | |
1124 | } | |
1125 | ||
1126 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1127 | ||
1128 | if (! *hostent->h_addr_list) | |
1129 | { | |
de5c39cf | 1130 | CLOSESOCKET (sock); |
9c0f2dac RS |
1131 | strcpy (pop_error, CONNECT_ERROR); |
1132 | strncat (pop_error, strerror (errno), | |
1133 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1134 | return (-1); | |
1135 | ||
1136 | } | |
1137 | ||
1138 | #ifdef KERBEROS | |
1139 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1140 | if (! (flags & POP_NO_KERBEROS)) | |
1141 | { | |
a27738b6 RS |
1142 | #ifdef KERBEROS5 |
1143 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1144 | { |
1145 | krb5error: | |
a27738b6 RS |
1146 | if (auth_context) |
1147 | krb5_auth_con_free (kcontext, auth_context); | |
1148 | if (kcontext) | |
1149 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1150 | strcpy (pop_error, KRB_ERROR); |
1151 | strncat (pop_error, error_message (rem), | |
1152 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1153 | CLOSESOCKET (sock); |
9c0f2dac RS |
1154 | return (-1); |
1155 | } | |
1156 | ||
a27738b6 RS |
1157 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1158 | goto krb5error; | |
1159 | ||
1160 | if (rem = krb5_cc_default (kcontext, &ccdef)) | |
1161 | goto krb5error; | |
1162 | ||
1163 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1164 | goto krb5error; | |
9c0f2dac RS |
1165 | |
1166 | for (cp = hostent->h_name; *cp; cp++) | |
1167 | { | |
1168 | if (isupper (*cp)) | |
1169 | { | |
1170 | *cp = tolower (*cp); | |
1171 | } | |
1172 | } | |
1173 | ||
a27738b6 RS |
1174 | if (rem = krb5_sname_to_principal (kcontext, hostent->h_name, |
1175 | POP_SERVICE, FALSE, &server)) | |
1176 | goto krb5error; | |
9c0f2dac | 1177 | |
a27738b6 RS |
1178 | rem = krb5_sendauth (kcontext, &auth_context, |
1179 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1180 | AP_OPTS_MUTUAL_REQUIRED, |
1181 | 0, /* no checksum */ | |
1182 | 0, /* no creds, use ccache instead */ | |
1183 | ccdef, | |
9c0f2dac | 1184 | &err_ret, |
a27738b6 | 1185 | 0, /* don't need subsession key */ |
9c0f2dac | 1186 | 0); /* don't need reply */ |
a27738b6 | 1187 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1188 | if (rem) |
1189 | { | |
1190 | if (err_ret && err_ret->text.length) | |
1191 | { | |
1192 | strcpy (pop_error, KRB_ERROR); | |
1193 | strncat (pop_error, error_message (rem), | |
1194 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1195 | strncat (pop_error, " [server says '", | |
1196 | ERROR_MAX - strlen (pop_error) - 1); | |
1197 | strncat (pop_error, err_ret->text.data, | |
1198 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1199 | err_ret->text.length)); | |
1200 | strncat (pop_error, "']", | |
1201 | ERROR_MAX - strlen (pop_error) - 1); | |
1202 | } | |
1203 | else | |
1204 | { | |
1205 | strcpy (pop_error, KRB_ERROR); | |
1206 | strncat (pop_error, error_message (rem), | |
1207 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1208 | } | |
1209 | if (err_ret) | |
a27738b6 RS |
1210 | krb5_free_error (kcontext, err_ret); |
1211 | krb5_auth_con_free (kcontext, auth_context); | |
1212 | krb5_free_context (kcontext); | |
9c0f2dac | 1213 | |
de5c39cf | 1214 | CLOSESOCKET (sock); |
9c0f2dac RS |
1215 | return (-1); |
1216 | } | |
a27738b6 | 1217 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1218 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1219 | realhost = strdup (hostent->h_name); |
1220 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, | |
1221 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1222 | (unsigned long) 0, &msg_data, &cred, schedule, |
1223 | (struct sockaddr_in *) 0, | |
1224 | (struct sockaddr_in *) 0, | |
1225 | "KPOPV0.1"); | |
1226 | free ((char *) ticket); | |
6a7eabe0 | 1227 | free (realhost); |
9c0f2dac RS |
1228 | if (rem != KSUCCESS) |
1229 | { | |
1230 | strcpy (pop_error, KRB_ERROR); | |
1231 | strncat (pop_error, krb_err_txt[rem], | |
1232 | ERROR_MAX - sizeof (KRB_ERROR)); | |
de5c39cf | 1233 | CLOSESOCKET (sock); |
9c0f2dac RS |
1234 | return (-1); |
1235 | } | |
a27738b6 | 1236 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1237 | } |
1238 | #endif /* KERBEROS */ | |
1239 | ||
1240 | return (sock); | |
1241 | } /* socket_connection */ | |
1242 | ||
1243 | /* | |
60b0a379 | 1244 | * Function: pop_getline |
9c0f2dac RS |
1245 | * |
1246 | * Purpose: Get a line of text from the connection and return a | |
1247 | * pointer to it. The carriage return and linefeed at the end of | |
1248 | * the line are stripped, but periods at the beginnings of lines | |
1249 | * are NOT dealt with in any special way. | |
1250 | * | |
1251 | * Arguments: | |
1252 | * server The server from which to get the line of text. | |
1253 | * | |
d89d0243 KH |
1254 | * Returns: The number of characters in the line, which is returned in |
1255 | * LINE, not including the final null. A return value of 0 | |
1256 | * indicates a blank line. A negative return value indicates an | |
1257 | * error (in which case the contents of LINE are undefined. In | |
1258 | * case of error, an error message is copied into pop_error. | |
9c0f2dac | 1259 | * |
60b0a379 | 1260 | * Notes: The line returned is overwritten with each call to pop_getline. |
9c0f2dac RS |
1261 | * |
1262 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1263 | * |
1264 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1265 | */ |
d89d0243 | 1266 | static int |
60b0a379 | 1267 | pop_getline (server, line) |
9c0f2dac | 1268 | popserver server; |
d89d0243 | 1269 | char **line; |
9c0f2dac RS |
1270 | { |
1271 | #define GETLINE_ERROR "Error reading from server: " | |
1272 | ||
1273 | int ret; | |
b6606ad8 RS |
1274 | int search_offset = 0; |
1275 | ||
9c0f2dac RS |
1276 | if (server->data) |
1277 | { | |
d89d0243 KH |
1278 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1279 | server->data); | |
9c0f2dac RS |
1280 | if (cp) |
1281 | { | |
1282 | int found; | |
1283 | int data_used; | |
1284 | ||
1285 | found = server->buffer_index; | |
1286 | data_used = (cp + 2) - server->buffer - found; | |
1287 | ||
1288 | *cp = '\0'; /* terminate the string to be returned */ | |
1289 | server->data -= data_used; | |
1290 | server->buffer_index += data_used; | |
1291 | ||
1292 | if (pop_debug) | |
d89d0243 KH |
1293 | /* Embedded nulls will truncate this output prematurely, |
1294 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1295 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1296 | *line = server->buffer + found; |
1297 | return (data_used - 2); | |
9c0f2dac RS |
1298 | } |
1299 | else | |
1300 | { | |
1301 | bcopy (server->buffer + server->buffer_index, | |
1302 | server->buffer, server->data); | |
b6606ad8 RS |
1303 | /* Record the fact that we've searched the data already in |
1304 | the buffer for a CRLF, so that when we search below, we | |
1305 | don't have to search the same data twice. There's a "- | |
1306 | 1" here to account for the fact that the last character | |
1307 | of the data we have may be the CR of a CRLF pair, of | |
1308 | which we haven't read the second half yet, so we may have | |
1309 | to search it again when we read more data. */ | |
1310 | search_offset = server->data - 1; | |
9c0f2dac RS |
1311 | server->buffer_index = 0; |
1312 | } | |
1313 | } | |
1314 | else | |
1315 | { | |
1316 | server->buffer_index = 0; | |
1317 | } | |
1318 | ||
1319 | while (1) | |
1320 | { | |
bbcac09c RS |
1321 | /* There's a "- 1" here to leave room for the null that we put |
1322 | at the end of the read data below. We put the null there so | |
1323 | that find_crlf knows where to stop when we call it. */ | |
1324 | if (server->data == server->buffer_size - 1) | |
9c0f2dac | 1325 | { |
bbcac09c RS |
1326 | server->buffer_size += GETLINE_INCR; |
1327 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); | |
1328 | if (! server->buffer) | |
9c0f2dac | 1329 | { |
bbcac09c RS |
1330 | strcpy (pop_error, "Out of memory in pop_getline"); |
1331 | pop_trash (server); | |
1332 | return (-1); | |
0ea95737 | 1333 | } |
0ea95737 | 1334 | } |
bbcac09c RS |
1335 | ret = RECV (server->file, server->buffer + server->data, |
1336 | server->buffer_size - server->data - 1, 0); | |
9c0f2dac RS |
1337 | if (ret < 0) |
1338 | { | |
1339 | strcpy (pop_error, GETLINE_ERROR); | |
1340 | strncat (pop_error, strerror (errno), | |
1341 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1342 | pop_trash (server); | |
d89d0243 | 1343 | return (-1); |
9c0f2dac RS |
1344 | } |
1345 | else if (ret == 0) | |
1346 | { | |
60b0a379 | 1347 | strcpy (pop_error, "Unexpected EOF from server in pop_getline"); |
9c0f2dac | 1348 | pop_trash (server); |
d89d0243 | 1349 | return (-1); |
9c0f2dac RS |
1350 | } |
1351 | else | |
1352 | { | |
7a481e50 | 1353 | char *cp; |
9c0f2dac | 1354 | server->data += ret; |
7a481e50 | 1355 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1356 | |
d89d0243 KH |
1357 | cp = find_crlf (server->buffer + search_offset, |
1358 | server->data - search_offset); | |
9c0f2dac RS |
1359 | if (cp) |
1360 | { | |
1361 | int data_used = (cp + 2) - server->buffer; | |
1362 | *cp = '\0'; | |
1363 | server->data -= data_used; | |
1364 | server->buffer_index = data_used; | |
1365 | ||
1366 | if (pop_debug) | |
1367 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1368 | *line = server->buffer; |
1369 | return (data_used - 2); | |
9c0f2dac | 1370 | } |
a8f44d07 RS |
1371 | /* As above, the "- 1" here is to account for the fact that |
1372 | we may have read a CR without its accompanying LF. */ | |
1373 | search_offset += ret - 1; | |
9c0f2dac RS |
1374 | } |
1375 | } | |
1376 | ||
1377 | /* NOTREACHED */ | |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | * Function: sendline | |
1382 | * | |
1383 | * Purpose: Sends a line of text to the POP server. The line of text | |
1384 | * passed into this function should NOT have the carriage return | |
1385 | * and linefeed on the end of it. Periods at beginnings of lines | |
1386 | * will NOT be treated specially by this function. | |
1387 | * | |
1388 | * Arguments: | |
1389 | * server The server to which to send the text. | |
1390 | * line The line of text to send. | |
1391 | * | |
1392 | * Return value: Upon successful completion, a value of 0 will be | |
1393 | * returned. Otherwise, a non-zero value will be returned, and | |
1394 | * an error will be copied into pop_error. | |
1395 | * | |
1396 | * Side effects: Closes the connection on error. | |
1397 | */ | |
1398 | static int | |
1399 | sendline (server, line) | |
1400 | popserver server; | |
1401 | char *line; | |
1402 | { | |
1403 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1404 | int ret; | |
1405 | ||
bbcac09c RS |
1406 | ret = fullwrite (server->file, line, strlen (line)); |
1407 | if (ret >= 0) | |
1408 | { /* 0 indicates that a blank line was written */ | |
1409 | ret = fullwrite (server->file, "\r\n", 2); | |
9c0f2dac RS |
1410 | } |
1411 | ||
1412 | if (ret < 0) | |
1413 | { | |
1414 | pop_trash (server); | |
1415 | strcpy (pop_error, SENDLINE_ERROR); | |
1416 | strncat (pop_error, strerror (errno), | |
1417 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1418 | return (ret); | |
1419 | } | |
1420 | ||
1421 | if (pop_debug) | |
1422 | fprintf (stderr, ">>> %s\n", line); | |
1423 | ||
1424 | return (0); | |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Procedure: fullwrite | |
1429 | * | |
1430 | * Purpose: Just like write, but keeps trying until the entire string | |
1431 | * has been written. | |
1432 | * | |
1433 | * Return value: Same as write. Pop_error is not set. | |
1434 | */ | |
1435 | static int | |
1436 | fullwrite (fd, buf, nbytes) | |
1437 | int fd; | |
1438 | char *buf; | |
1439 | int nbytes; | |
1440 | { | |
1441 | char *cp; | |
9d3f4cee | 1442 | int ret = 0; |
9c0f2dac RS |
1443 | |
1444 | cp = buf; | |
9d3f4cee | 1445 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1446 | { |
1447 | cp += ret; | |
1448 | nbytes -= ret; | |
1449 | } | |
1450 | ||
1451 | return (ret); | |
1452 | } | |
1453 | ||
1454 | /* | |
1455 | * Procedure getok | |
1456 | * | |
1457 | * Purpose: Reads a line from the server. If the return indicator is | |
1458 | * positive, return with a zero exit status. If not, return with | |
1459 | * a negative exit status. | |
1460 | * | |
1461 | * Arguments: | |
1462 | * server The server to read from. | |
1463 | * | |
1464 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1465 | * | |
8e6208c5 | 1466 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1467 | */ |
1468 | static int | |
1469 | getok (server) | |
1470 | popserver server; | |
1471 | { | |
1472 | char *fromline; | |
1473 | ||
60b0a379 | 1474 | if (pop_getline (server, &fromline) < 0) |
9c0f2dac RS |
1475 | { |
1476 | return (-1); | |
1477 | } | |
1478 | ||
1479 | if (! strncmp (fromline, "+OK", 3)) | |
1480 | return (0); | |
1481 | else if (! strncmp (fromline, "-ERR", 4)) | |
1482 | { | |
1483 | strncpy (pop_error, fromline, ERROR_MAX); | |
1484 | pop_error[ERROR_MAX-1] = '\0'; | |
1485 | return (-1); | |
1486 | } | |
1487 | else | |
1488 | { | |
1489 | strcpy (pop_error, | |
1490 | "Unexpected response from server; expecting +OK or -ERR"); | |
1491 | pop_trash (server); | |
1492 | return (-1); | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | #if 0 | |
1497 | /* | |
1498 | * Function: gettermination | |
1499 | * | |
1500 | * Purpose: Gets the next line and verifies that it is a termination | |
1501 | * line (nothing but a dot). | |
1502 | * | |
1503 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1504 | * | |
1505 | * Side effects: Closes the connection on error. | |
1506 | */ | |
1507 | static int | |
1508 | gettermination (server) | |
1509 | popserver server; | |
1510 | { | |
1511 | char *fromserver; | |
1512 | ||
60b0a379 | 1513 | if (pop_getline (server, &fromserver) < 0) |
9c0f2dac RS |
1514 | return (-1); |
1515 | ||
1516 | if (strcmp (fromserver, ".")) | |
1517 | { | |
1518 | strcpy (pop_error, | |
1519 | "Unexpected response from server in gettermination"); | |
1520 | pop_trash (server); | |
1521 | return (-1); | |
1522 | } | |
1523 | ||
1524 | return (0); | |
1525 | } | |
1526 | #endif | |
1527 | ||
1528 | /* | |
1529 | * Function pop_close | |
1530 | * | |
1531 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1532 | * preserve any changes that were made and a "QUIT" command to | |
1533 | * try to get the server to quit, but ignoring any responses that | |
1534 | * are received. | |
1535 | * | |
8e6208c5 | 1536 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1537 | * Changes made to the maildrop since the session was started (or |
1538 | * since the last pop_reset) may be lost. | |
1539 | */ | |
1540 | void | |
1541 | pop_close (server) | |
1542 | popserver server; | |
1543 | { | |
1544 | pop_trash (server); | |
1545 | free ((char *) server); | |
1546 | ||
1547 | return; | |
1548 | } | |
1549 | ||
1550 | /* | |
1551 | * Function: pop_trash | |
1552 | * | |
1553 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1554 | * memory associated with the server. It is legal to call | |
1555 | * pop_close or pop_quit after this function has been called. | |
1556 | */ | |
1557 | static void | |
1558 | pop_trash (server) | |
1559 | popserver server; | |
1560 | { | |
1561 | if (server->file >= 0) | |
1562 | { | |
c2668a61 RS |
1563 | /* avoid recursion; sendline can call pop_trash */ |
1564 | if (server->trash_started) | |
1565 | return; | |
1566 | server->trash_started = 1; | |
de5c39cf | 1567 | |
9c0f2dac RS |
1568 | sendline (server, "RSET"); |
1569 | sendline (server, "QUIT"); | |
1570 | ||
de5c39cf | 1571 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1572 | server->file = -1; |
1573 | if (server->buffer) | |
1574 | { | |
1575 | free (server->buffer); | |
1576 | server->buffer = 0; | |
1577 | } | |
1578 | } | |
c2668a61 RS |
1579 | |
1580 | #ifdef WINDOWSNT | |
1581 | if (have_winsock) | |
1582 | WSACleanup (); | |
1583 | #endif | |
9c0f2dac RS |
1584 | } |
1585 | ||
d89d0243 KH |
1586 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1587 | embedded nulls and has LEN characters in it not including the final | |
1588 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1589 | |
1590 | static char * | |
d89d0243 | 1591 | find_crlf (in_string, len) |
8148baf9 | 1592 | char *in_string; |
d89d0243 | 1593 | int len; |
9c0f2dac | 1594 | { |
d89d0243 | 1595 | while (len--) |
9c0f2dac | 1596 | { |
d89d0243 | 1597 | if (*in_string == '\r') |
8148baf9 RS |
1598 | { |
1599 | if (*++in_string == '\n') | |
1600 | return (in_string - 1); | |
1601 | } | |
1602 | else | |
1603 | in_string++; | |
9c0f2dac | 1604 | } |
d89d0243 | 1605 | return (0); |
9c0f2dac RS |
1606 | } |
1607 | ||
1608 | #endif /* MAIL_USE_POP */ |