Commit | Line | Data |
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9c0f2dac | 1 | /* pop.c: client routines for talking to a POP3-protocol post-office server |
a27738b6 | 2 | Copyright (c) 1991, 1993, 1996, 1997 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 | ||
31 | #ifdef HAVE_CONFIG_H | |
32 | /* Cancel these substitutions made in config.h */ | |
33 | #undef open | |
6d683104 RS |
34 | #undef read |
35 | #undef write | |
8148baf9 RS |
36 | #undef close |
37 | #endif | |
9c0f2dac RS |
38 | |
39 | #include <sys/types.h> | |
c2668a61 RS |
40 | #ifdef WINDOWSNT |
41 | #include "ntlib.h" | |
42 | #include <winsock.h> | |
43 | #undef SOCKET_ERROR | |
de5c39cf RS |
44 | #define RECV(s,buf,len,flags) recv(s,buf,len,flags) |
45 | #define SEND(s,buf,len,flags) send(s,buf,len,flags) | |
46 | #define CLOSESOCKET(s) closesocket(s) | |
c2668a61 | 47 | #else |
9c0f2dac RS |
48 | #include <netinet/in.h> |
49 | #include <sys/socket.h> | |
de5c39cf RS |
50 | #define RECV(s,buf,len,flags) read(s,buf,len) |
51 | #define SEND(s,buf,len,flags) write(s,buf,len) | |
52 | #define CLOSESOCKET(s) close(s) | |
c2668a61 | 53 | #endif |
9c0f2dac | 54 | #include <pop.h> |
625ad89f | 55 | |
9c0f2dac RS |
56 | #ifdef sun |
57 | #include <malloc.h> | |
8148baf9 | 58 | #endif /* sun */ |
625ad89f | 59 | |
9c0f2dac RS |
60 | #ifdef HESIOD |
61 | #include <hesiod.h> | |
62 | /* | |
63 | * It really shouldn't be necessary to put this declaration here, but | |
64 | * the version of hesiod.h that Athena has installed in release 7.2 | |
65 | * doesn't declare this function; I don't know if the 7.3 version of | |
66 | * hesiod.h does. | |
67 | */ | |
68 | extern struct servent *hes_getservbyname (/* char *, char * */); | |
69 | #endif | |
625ad89f | 70 | |
9c0f2dac | 71 | #include <pwd.h> |
9c0f2dac RS |
72 | #include <netdb.h> |
73 | #include <errno.h> | |
74 | #include <stdio.h> | |
a27738b6 RS |
75 | #ifdef STDC_HEADERS |
76 | #include <string.h> | |
020d3015 KH |
77 | #define index strchr |
78 | #endif | |
79 | #ifdef STDC_HEADERS | |
80 | #include <stdlib.h> | |
81 | #endif | |
82 | #ifdef HAVE_UNISTD_H | |
83 | #include <unistd.h> | |
a27738b6 | 84 | #endif |
625ad89f | 85 | |
9c0f2dac | 86 | #ifdef KERBEROS |
a27738b6 RS |
87 | # ifdef HAVE_KRB5_H |
88 | # include <krb5.h> | |
89 | # endif | |
90 | # ifdef HAVE_DES_H | |
91 | # include <des.h> | |
92 | # else | |
93 | # ifdef HAVE_KERBEROSIV_DES_H | |
94 | # include <kerberosIV/des.h> | |
95 | # else | |
96 | # ifdef HAVE_KERBEROS_DES_H | |
97 | # include <kerberos/des.h> | |
98 | # endif | |
99 | # endif | |
100 | # endif | |
101 | # ifdef HAVE_KRB_H | |
102 | # include <krb.h> | |
103 | # else | |
104 | # ifdef HAVE_KERBEROSIV_KRB_H | |
105 | # include <kerberosIV/krb.h> | |
106 | # else | |
107 | # ifdef HAVE_KERBEROS_KRB_H | |
108 | # include <kerberos/krb.h> | |
109 | # endif | |
110 | # endif | |
111 | # endif | |
112 | # ifdef HAVE_COM_ERR_H | |
113 | # include <com_err.h> | |
114 | # endif | |
8148baf9 | 115 | #endif /* KERBEROS */ |
9c0f2dac | 116 | |
8148baf9 | 117 | #ifdef KERBEROS |
a27738b6 | 118 | #ifndef KERBEROS5 |
9c0f2dac | 119 | extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *, |
8148baf9 RS |
120 | u_long, MSG_DAT *, CREDENTIALS *, Key_schedule, |
121 | struct sockaddr_in *, struct sockaddr_in *, | |
122 | char * */); | |
9c0f2dac | 123 | extern char *krb_realmofhost (/* char * */); |
a27738b6 | 124 | #endif /* ! KERBEROS5 */ |
8148baf9 | 125 | #endif /* KERBEROS */ |
9c0f2dac | 126 | |
c2668a61 | 127 | #ifndef WINDOWSNT |
8148baf9 | 128 | #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H) |
9c0f2dac RS |
129 | extern int h_errno; |
130 | #endif | |
c2668a61 | 131 | #endif |
9c0f2dac | 132 | |
d89d0243 KH |
133 | #ifndef _P |
134 | # ifdef __STDC__ | |
135 | # define _P(a) a | |
136 | # else | |
137 | # define _P(a) () | |
138 | # endif /* __STDC__ */ | |
139 | #endif /* ! __P */ | |
140 | ||
141 | static int socket_connection _P((char *, int)); | |
142 | static int getline _P((popserver, char **)); | |
143 | static int sendline _P((popserver, char *)); | |
144 | static int fullwrite _P((int, char *, int)); | |
145 | static int getok _P((popserver)); | |
9c0f2dac | 146 | #if 0 |
d89d0243 | 147 | static int gettermination _P((popserver)); |
9c0f2dac | 148 | #endif |
d89d0243 KH |
149 | static void pop_trash _P((popserver)); |
150 | static char *find_crlf _P((char *, int)); | |
7a481e50 | 151 | |
9c0f2dac RS |
152 | #define ERROR_MAX 80 /* a pretty arbitrary size */ |
153 | #define POP_PORT 110 | |
154 | #define KPOP_PORT 1109 | |
c2668a61 RS |
155 | #ifdef WINDOWSNT |
156 | #define POP_SERVICE "pop3" /* we don't want the POP2 port! */ | |
157 | #else | |
9c0f2dac | 158 | #define POP_SERVICE "pop" |
c2668a61 | 159 | #endif |
9c0f2dac | 160 | #ifdef KERBEROS |
9c0f2dac RS |
161 | #define KPOP_SERVICE "kpop" |
162 | #endif | |
9c0f2dac RS |
163 | |
164 | char pop_error[ERROR_MAX]; | |
165 | int pop_debug = 0; | |
166 | ||
167 | #ifndef min | |
168 | #define min(a,b) (((a) < (b)) ? (a) : (b)) | |
169 | #endif | |
170 | ||
171 | /* | |
172 | * Function: pop_open (char *host, char *username, char *password, | |
173 | * int flags) | |
174 | * | |
175 | * Purpose: Establishes a connection with a post-office server, and | |
176 | * completes the authorization portion of the session. | |
177 | * | |
178 | * Arguments: | |
179 | * host The server host with which the connection should be | |
180 | * established. Optional. If omitted, internal | |
181 | * heuristics will be used to determine the server host, | |
182 | * if possible. | |
183 | * username | |
184 | * The username of the mail-drop to access. Optional. | |
185 | * If omitted, internal heuristics will be used to | |
186 | * determine the username, if possible. | |
187 | * password | |
188 | * The password to use for authorization. If omitted, | |
189 | * internal heuristics will be used to determine the | |
190 | * password, if possible. | |
191 | * flags A bit mask containing flags controlling certain | |
192 | * functions of the routine. Valid flags are defined in | |
193 | * the file pop.h | |
194 | * | |
195 | * Return value: Upon successful establishment of a connection, a | |
196 | * non-null popserver will be returned. Otherwise, null will be | |
197 | * returned, and the string variable pop_error will contain an | |
198 | * explanation of the error. | |
199 | */ | |
200 | popserver | |
201 | pop_open (host, username, password, flags) | |
202 | char *host; | |
203 | char *username; | |
204 | char *password; | |
205 | int flags; | |
206 | { | |
207 | int sock; | |
208 | popserver server; | |
209 | ||
210 | /* Determine the user name */ | |
211 | if (! username) | |
212 | { | |
213 | username = getenv ("USER"); | |
214 | if (! (username && *username)) | |
215 | { | |
216 | username = getlogin (); | |
217 | if (! (username && *username)) | |
218 | { | |
219 | struct passwd *passwd; | |
220 | passwd = getpwuid (getuid ()); | |
221 | if (passwd && passwd->pw_name && *passwd->pw_name) | |
222 | { | |
223 | username = passwd->pw_name; | |
224 | } | |
225 | else | |
226 | { | |
227 | strcpy (pop_error, "Could not determine username"); | |
228 | return (0); | |
229 | } | |
230 | } | |
231 | } | |
232 | } | |
233 | ||
234 | /* | |
235 | * Determine the mail host. | |
236 | */ | |
237 | ||
238 | if (! host) | |
239 | { | |
240 | host = getenv ("MAILHOST"); | |
241 | } | |
242 | ||
243 | #ifdef HESIOD | |
244 | if ((! host) && (! (flags & POP_NO_HESIOD))) | |
245 | { | |
246 | struct hes_postoffice *office; | |
247 | office = hes_getmailhost (username); | |
248 | if (office && office->po_type && (! strcmp (office->po_type, "POP")) | |
249 | && office->po_name && *office->po_name && office->po_host | |
250 | && *office->po_host) | |
251 | { | |
252 | host = office->po_host; | |
253 | username = office->po_name; | |
254 | } | |
255 | } | |
256 | #endif | |
257 | ||
258 | #ifdef MAILHOST | |
259 | if (! host) | |
260 | { | |
261 | host = MAILHOST; | |
262 | } | |
263 | #endif | |
264 | ||
265 | if (! host) | |
266 | { | |
267 | strcpy (pop_error, "Could not determine POP server"); | |
268 | return (0); | |
269 | } | |
270 | ||
271 | /* Determine the password */ | |
272 | #ifdef KERBEROS | |
273 | #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS)) | |
274 | #else | |
275 | #define DONT_NEED_PASSWORD 0 | |
276 | #endif | |
277 | ||
278 | if ((! password) && (! DONT_NEED_PASSWORD)) | |
279 | { | |
280 | if (! (flags & POP_NO_GETPASS)) | |
281 | { | |
282 | password = getpass ("Enter POP password:"); | |
283 | } | |
284 | if (! password) | |
285 | { | |
286 | strcpy (pop_error, "Could not determine POP password"); | |
287 | return (0); | |
288 | } | |
289 | } | |
290 | if (password) | |
291 | flags |= POP_NO_KERBEROS; | |
292 | else | |
293 | password = username; | |
294 | ||
295 | sock = socket_connection (host, flags); | |
296 | if (sock == -1) | |
297 | return (0); | |
298 | ||
299 | server = (popserver) malloc (sizeof (struct _popserver)); | |
300 | if (! server) | |
301 | { | |
302 | strcpy (pop_error, "Out of memory in pop_open"); | |
303 | return (0); | |
304 | } | |
305 | server->buffer = (char *) malloc (GETLINE_MIN); | |
306 | if (! server->buffer) | |
307 | { | |
308 | strcpy (pop_error, "Out of memory in pop_open"); | |
309 | free ((char *) server); | |
310 | return (0); | |
311 | } | |
312 | ||
313 | server->file = sock; | |
314 | server->data = 0; | |
315 | server->buffer_index = 0; | |
316 | server->buffer_size = GETLINE_MIN; | |
317 | server->in_multi = 0; | |
c2668a61 | 318 | server->trash_started = 0; |
9c0f2dac RS |
319 | |
320 | if (getok (server)) | |
321 | return (0); | |
322 | ||
323 | /* | |
324 | * I really shouldn't use the pop_error variable like this, but.... | |
325 | */ | |
326 | if (strlen (username) > ERROR_MAX - 6) | |
327 | { | |
328 | pop_close (server); | |
329 | strcpy (pop_error, | |
330 | "Username too long; recompile pop.c with larger ERROR_MAX"); | |
331 | return (0); | |
332 | } | |
333 | sprintf (pop_error, "USER %s", username); | |
334 | ||
335 | if (sendline (server, pop_error) || getok (server)) | |
336 | { | |
337 | return (0); | |
338 | } | |
339 | ||
340 | if (strlen (password) > ERROR_MAX - 6) | |
341 | { | |
342 | pop_close (server); | |
343 | strcpy (pop_error, | |
344 | "Password too long; recompile pop.c with larger ERROR_MAX"); | |
345 | return (0); | |
346 | } | |
347 | sprintf (pop_error, "PASS %s", password); | |
348 | ||
349 | if (sendline (server, pop_error) || getok (server)) | |
350 | { | |
351 | return (0); | |
352 | } | |
353 | ||
354 | return (server); | |
355 | } | |
356 | ||
357 | /* | |
358 | * Function: pop_stat | |
359 | * | |
360 | * Purpose: Issue the STAT command to the server and return (in the | |
361 | * value parameters) the number of messages in the maildrop and | |
362 | * the total size of the maildrop. | |
363 | * | |
364 | * Return value: 0 on success, or non-zero with an error in pop_error | |
365 | * in failure. | |
366 | * | |
367 | * Side effects: On failure, may make further operations on the | |
368 | * connection impossible. | |
369 | */ | |
370 | int | |
371 | pop_stat (server, count, size) | |
372 | popserver server; | |
373 | int *count; | |
374 | int *size; | |
375 | { | |
376 | char *fromserver; | |
377 | ||
378 | if (server->in_multi) | |
379 | { | |
380 | strcpy (pop_error, "In multi-line query in pop_stat"); | |
381 | return (-1); | |
382 | } | |
383 | ||
d89d0243 | 384 | if (sendline (server, "STAT") || (getline (server, &fromserver) < 0)) |
9c0f2dac RS |
385 | return (-1); |
386 | ||
387 | if (strncmp (fromserver, "+OK ", 4)) | |
388 | { | |
389 | if (0 == strncmp (fromserver, "-ERR", 4)) | |
390 | { | |
391 | strncpy (pop_error, fromserver, ERROR_MAX); | |
392 | } | |
393 | else | |
394 | { | |
395 | strcpy (pop_error, | |
396 | "Unexpected response from POP server in pop_stat"); | |
397 | pop_trash (server); | |
398 | } | |
399 | return (-1); | |
400 | } | |
401 | ||
402 | *count = atoi (&fromserver[4]); | |
403 | ||
404 | fromserver = index (&fromserver[4], ' '); | |
405 | if (! fromserver) | |
406 | { | |
407 | strcpy (pop_error, | |
408 | "Badly formatted response from server in pop_stat"); | |
409 | pop_trash (server); | |
410 | return (-1); | |
411 | } | |
412 | ||
413 | *size = atoi (fromserver + 1); | |
414 | ||
415 | return (0); | |
416 | } | |
417 | ||
418 | /* | |
419 | * Function: pop_list | |
420 | * | |
421 | * Purpose: Performs the POP "list" command and returns (in value | |
422 | * parameters) two malloc'd zero-terminated arrays -- one of | |
423 | * message IDs, and a parallel one of sizes. | |
424 | * | |
425 | * Arguments: | |
426 | * server The pop connection to talk to. | |
427 | * message The number of the one message about which to get | |
428 | * information, or 0 to get information about all | |
429 | * messages. | |
430 | * | |
431 | * Return value: 0 on success, non-zero with error in pop_error on | |
432 | * failure. | |
433 | * | |
434 | * Side effects: On failure, may make further operations on the | |
435 | * connection impossible. | |
436 | */ | |
437 | int | |
438 | pop_list (server, message, IDs, sizes) | |
439 | popserver server; | |
440 | int message; | |
441 | int **IDs; | |
442 | int **sizes; | |
443 | { | |
444 | int how_many, i; | |
445 | char *fromserver; | |
446 | ||
447 | if (server->in_multi) | |
448 | { | |
449 | strcpy (pop_error, "In multi-line query in pop_list"); | |
450 | return (-1); | |
451 | } | |
452 | ||
453 | if (message) | |
454 | how_many = 1; | |
455 | else | |
456 | { | |
457 | int count, size; | |
458 | if (pop_stat (server, &count, &size)) | |
459 | return (-1); | |
460 | how_many = count; | |
461 | } | |
462 | ||
463 | *IDs = (int *) malloc ((how_many + 1) * sizeof (int)); | |
464 | *sizes = (int *) malloc ((how_many + 1) * sizeof (int)); | |
465 | if (! (*IDs && *sizes)) | |
466 | { | |
467 | strcpy (pop_error, "Out of memory in pop_list"); | |
468 | return (-1); | |
469 | } | |
470 | ||
471 | if (message) | |
472 | { | |
473 | sprintf (pop_error, "LIST %d", message); | |
474 | if (sendline (server, pop_error)) | |
475 | { | |
476 | free ((char *) *IDs); | |
477 | free ((char *) *sizes); | |
478 | return (-1); | |
479 | } | |
d89d0243 | 480 | if (getline (server, &fromserver) < 0) |
9c0f2dac RS |
481 | { |
482 | free ((char *) *IDs); | |
483 | free ((char *) *sizes); | |
484 | return (-1); | |
485 | } | |
486 | if (strncmp (fromserver, "+OK ", 4)) | |
487 | { | |
488 | if (! strncmp (fromserver, "-ERR", 4)) | |
489 | strncpy (pop_error, fromserver, ERROR_MAX); | |
490 | else | |
491 | { | |
492 | strcpy (pop_error, | |
493 | "Unexpected response from server in pop_list"); | |
494 | pop_trash (server); | |
495 | } | |
496 | free ((char *) *IDs); | |
497 | free ((char *) *sizes); | |
498 | return (-1); | |
499 | } | |
500 | (*IDs)[0] = atoi (&fromserver[4]); | |
501 | fromserver = index (&fromserver[4], ' '); | |
502 | if (! fromserver) | |
503 | { | |
504 | strcpy (pop_error, | |
505 | "Badly formatted response from server in pop_list"); | |
506 | pop_trash (server); | |
507 | free ((char *) *IDs); | |
508 | free ((char *) *sizes); | |
509 | return (-1); | |
510 | } | |
511 | (*sizes)[0] = atoi (fromserver); | |
512 | (*IDs)[1] = (*sizes)[1] = 0; | |
513 | return (0); | |
514 | } | |
515 | else | |
516 | { | |
517 | if (pop_multi_first (server, "LIST", &fromserver)) | |
518 | { | |
519 | free ((char *) *IDs); | |
520 | free ((char *) *sizes); | |
521 | return (-1); | |
522 | } | |
523 | for (i = 0; i < how_many; i++) | |
524 | { | |
d89d0243 | 525 | if (pop_multi_next (server, &fromserver) <= 0) |
9c0f2dac RS |
526 | { |
527 | free ((char *) *IDs); | |
528 | free ((char *) *sizes); | |
529 | return (-1); | |
530 | } | |
531 | (*IDs)[i] = atoi (fromserver); | |
532 | fromserver = index (fromserver, ' '); | |
533 | if (! fromserver) | |
534 | { | |
535 | strcpy (pop_error, | |
536 | "Badly formatted response from server in pop_list"); | |
537 | free ((char *) *IDs); | |
538 | free ((char *) *sizes); | |
539 | pop_trash (server); | |
540 | return (-1); | |
541 | } | |
542 | (*sizes)[i] = atoi (fromserver); | |
543 | } | |
d89d0243 | 544 | if (pop_multi_next (server, &fromserver) < 0) |
9c0f2dac RS |
545 | { |
546 | free ((char *) *IDs); | |
547 | free ((char *) *sizes); | |
548 | return (-1); | |
549 | } | |
550 | else if (fromserver) | |
551 | { | |
552 | strcpy (pop_error, | |
553 | "Too many response lines from server in pop_list"); | |
554 | free ((char *) *IDs); | |
555 | free ((char *) *sizes); | |
556 | return (-1); | |
557 | } | |
558 | (*IDs)[i] = (*sizes)[i] = 0; | |
559 | return (0); | |
560 | } | |
561 | } | |
562 | ||
563 | /* | |
564 | * Function: pop_retrieve | |
565 | * | |
566 | * Purpose: Retrieve a specified message from the maildrop. | |
567 | * | |
568 | * Arguments: | |
569 | * server The server to retrieve from. | |
570 | * message The message number to retrieve. | |
571 | * markfrom | |
572 | * If true, then mark the string "From " at the beginning | |
573 | * of lines with '>'. | |
d89d0243 KH |
574 | * msg_buf Output parameter to which a buffer containing the |
575 | * message is assigned. | |
9c0f2dac | 576 | * |
d89d0243 KH |
577 | * Return value: The number of bytes in msg_buf, which may contain |
578 | * embedded nulls, not including its final null, or -1 on error | |
579 | * with pop_error set. | |
9c0f2dac RS |
580 | * |
581 | * Side effects: May kill connection on error. | |
582 | */ | |
d89d0243 KH |
583 | int |
584 | pop_retrieve (server, message, markfrom, msg_buf) | |
9c0f2dac RS |
585 | popserver server; |
586 | int message; | |
587 | int markfrom; | |
d89d0243 | 588 | char **msg_buf; |
9c0f2dac RS |
589 | { |
590 | int *IDs, *sizes, bufsize, fromcount = 0, cp = 0; | |
591 | char *ptr, *fromserver; | |
592 | int ret; | |
593 | ||
594 | if (server->in_multi) | |
595 | { | |
596 | strcpy (pop_error, "In multi-line query in pop_retrieve"); | |
d89d0243 | 597 | return (-1); |
9c0f2dac RS |
598 | } |
599 | ||
600 | if (pop_list (server, message, &IDs, &sizes)) | |
d89d0243 | 601 | return (-1); |
9c0f2dac RS |
602 | |
603 | if (pop_retrieve_first (server, message, &fromserver)) | |
604 | { | |
d89d0243 | 605 | return (-1); |
9c0f2dac RS |
606 | } |
607 | ||
608 | /* | |
609 | * The "5" below is an arbitrary constant -- I assume that if | |
610 | * there are "From" lines in the text to be marked, there | |
611 | * probably won't be more than 5 of them. If there are, I | |
612 | * allocate more space for them below. | |
613 | */ | |
614 | bufsize = sizes[0] + (markfrom ? 5 : 0); | |
7d665945 | 615 | ptr = (char *)malloc (bufsize); |
9c0f2dac RS |
616 | free ((char *) IDs); |
617 | free ((char *) sizes); | |
618 | ||
619 | if (! ptr) | |
620 | { | |
621 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
622 | pop_retrieve_flush (server); | |
d89d0243 | 623 | return (-1); |
9c0f2dac RS |
624 | } |
625 | ||
d89d0243 | 626 | while ((ret = pop_retrieve_next (server, &fromserver)) >= 0) |
9c0f2dac | 627 | { |
9c0f2dac RS |
628 | if (! fromserver) |
629 | { | |
630 | ptr[cp] = '\0'; | |
d89d0243 KH |
631 | *msg_buf = ptr; |
632 | return (cp); | |
9c0f2dac RS |
633 | } |
634 | if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' && | |
635 | fromserver[2] == 'o' && fromserver[3] == 'm' && | |
636 | fromserver[4] == ' ') | |
637 | { | |
638 | if (++fromcount == 5) | |
639 | { | |
640 | bufsize += 5; | |
7d665945 | 641 | ptr = (char *)realloc (ptr, bufsize); |
9c0f2dac RS |
642 | if (! ptr) |
643 | { | |
644 | strcpy (pop_error, "Out of memory in pop_retrieve"); | |
645 | pop_retrieve_flush (server); | |
d89d0243 | 646 | return (-1); |
9c0f2dac RS |
647 | } |
648 | fromcount = 0; | |
649 | } | |
650 | ptr[cp++] = '>'; | |
651 | } | |
d89d0243 KH |
652 | bcopy (fromserver, &ptr[cp], ret); |
653 | cp += ret; | |
9c0f2dac RS |
654 | ptr[cp++] = '\n'; |
655 | } | |
656 | ||
d89d0243 KH |
657 | free (ptr); |
658 | return (-1); | |
9c0f2dac RS |
659 | } |
660 | ||
661 | int | |
662 | pop_retrieve_first (server, message, response) | |
663 | popserver server; | |
664 | int message; | |
665 | char **response; | |
666 | { | |
667 | sprintf (pop_error, "RETR %d", message); | |
668 | return (pop_multi_first (server, pop_error, response)); | |
669 | } | |
670 | ||
d89d0243 KH |
671 | /* |
672 | Returns a negative number on error, 0 to indicate that the data has | |
673 | all been read (i.e., the server has returned a "." termination | |
674 | line), or a positive number indicating the number of bytes in the | |
675 | returned buffer (which is null-terminated and may contain embedded | |
676 | nulls, but the returned bytecount doesn't include the final null). | |
677 | */ | |
678 | ||
9c0f2dac RS |
679 | int |
680 | pop_retrieve_next (server, line) | |
681 | popserver server; | |
682 | char **line; | |
683 | { | |
684 | return (pop_multi_next (server, line)); | |
685 | } | |
686 | ||
687 | int | |
688 | pop_retrieve_flush (server) | |
689 | popserver server; | |
690 | { | |
691 | return (pop_multi_flush (server)); | |
692 | } | |
693 | ||
694 | int | |
695 | pop_top_first (server, message, lines, response) | |
696 | popserver server; | |
697 | int message, lines; | |
698 | char **response; | |
699 | { | |
700 | sprintf (pop_error, "TOP %d %d", message, lines); | |
701 | return (pop_multi_first (server, pop_error, response)); | |
702 | } | |
703 | ||
d89d0243 KH |
704 | /* |
705 | Returns a negative number on error, 0 to indicate that the data has | |
706 | all been read (i.e., the server has returned a "." termination | |
707 | line), or a positive number indicating the number of bytes in the | |
708 | returned buffer (which is null-terminated and may contain embedded | |
709 | nulls, but the returned bytecount doesn't include the final null). | |
710 | */ | |
711 | ||
9c0f2dac RS |
712 | int |
713 | pop_top_next (server, line) | |
714 | popserver server; | |
715 | char **line; | |
716 | { | |
717 | return (pop_multi_next (server, line)); | |
718 | } | |
719 | ||
720 | int | |
721 | pop_top_flush (server) | |
722 | popserver server; | |
723 | { | |
724 | return (pop_multi_flush (server)); | |
725 | } | |
726 | ||
727 | int | |
728 | pop_multi_first (server, command, response) | |
729 | popserver server; | |
730 | char *command; | |
731 | char **response; | |
732 | { | |
733 | if (server->in_multi) | |
734 | { | |
735 | strcpy (pop_error, | |
736 | "Already in multi-line query in pop_multi_first"); | |
737 | return (-1); | |
738 | } | |
739 | ||
d89d0243 | 740 | if (sendline (server, command) || (getline (server, response) < 0)) |
9c0f2dac RS |
741 | { |
742 | return (-1); | |
743 | } | |
744 | ||
745 | if (0 == strncmp (*response, "-ERR", 4)) | |
746 | { | |
747 | strncpy (pop_error, *response, ERROR_MAX); | |
748 | return (-1); | |
749 | } | |
750 | else if (0 == strncmp (*response, "+OK", 3)) | |
751 | { | |
752 | for (*response += 3; **response == ' '; (*response)++) /* empty */; | |
753 | server->in_multi = 1; | |
754 | return (0); | |
755 | } | |
756 | else | |
757 | { | |
758 | strcpy (pop_error, | |
759 | "Unexpected response from server in pop_multi_first"); | |
760 | return (-1); | |
761 | } | |
762 | } | |
763 | ||
d89d0243 KH |
764 | /* |
765 | Read the next line of data from SERVER and place a pointer to it | |
766 | into LINE. Return -1 on error, 0 if there are no more lines to read | |
767 | (i.e., the server has returned a line containing only "."), or a | |
768 | positive number indicating the number of bytes in the LINE buffer | |
769 | (not including the final null). The data in that buffer may contain | |
770 | embedded nulls, but does not contain the final CRLF. When returning | |
771 | 0, LINE is set to null. */ | |
772 | ||
9c0f2dac RS |
773 | int |
774 | pop_multi_next (server, line) | |
775 | popserver server; | |
776 | char **line; | |
777 | { | |
778 | char *fromserver; | |
d89d0243 | 779 | int ret; |
9c0f2dac RS |
780 | |
781 | if (! server->in_multi) | |
782 | { | |
783 | strcpy (pop_error, "Not in multi-line query in pop_multi_next"); | |
784 | return (-1); | |
785 | } | |
786 | ||
d89d0243 | 787 | if ((ret = getline (server, &fromserver)) < 0) |
9c0f2dac RS |
788 | { |
789 | return (-1); | |
790 | } | |
791 | ||
792 | if (fromserver[0] == '.') | |
793 | { | |
794 | if (! fromserver[1]) | |
795 | { | |
796 | *line = 0; | |
797 | server->in_multi = 0; | |
798 | return (0); | |
799 | } | |
800 | else | |
801 | { | |
802 | *line = fromserver + 1; | |
d89d0243 | 803 | return (ret - 1); |
9c0f2dac RS |
804 | } |
805 | } | |
806 | else | |
807 | { | |
808 | *line = fromserver; | |
d89d0243 | 809 | return (ret); |
9c0f2dac RS |
810 | } |
811 | } | |
812 | ||
813 | int | |
814 | pop_multi_flush (server) | |
815 | popserver server; | |
816 | { | |
817 | char *line; | |
d89d0243 | 818 | int ret; |
9c0f2dac RS |
819 | |
820 | if (! server->in_multi) | |
821 | { | |
822 | return (0); | |
823 | } | |
824 | ||
d89d0243 | 825 | while ((ret = pop_multi_next (server, &line))) |
9c0f2dac | 826 | { |
d89d0243 KH |
827 | if (ret < 0) |
828 | return (-1); | |
9c0f2dac RS |
829 | } |
830 | ||
d89d0243 | 831 | return (0); |
9c0f2dac RS |
832 | } |
833 | ||
834 | /* Function: pop_delete | |
835 | * | |
836 | * Purpose: Delete a specified message. | |
837 | * | |
838 | * Arguments: | |
839 | * server Server from which to delete the message. | |
840 | * message Message to delete. | |
841 | * | |
842 | * Return value: 0 on success, non-zero with error in pop_error | |
843 | * otherwise. | |
844 | */ | |
845 | int | |
846 | pop_delete (server, message) | |
847 | popserver server; | |
848 | int message; | |
849 | { | |
850 | if (server->in_multi) | |
851 | { | |
852 | strcpy (pop_error, "In multi-line query in pop_delete"); | |
853 | return (-1); | |
854 | } | |
855 | ||
856 | sprintf (pop_error, "DELE %d", message); | |
857 | ||
858 | if (sendline (server, pop_error) || getok (server)) | |
859 | return (-1); | |
860 | ||
861 | return (0); | |
862 | } | |
863 | ||
864 | /* | |
865 | * Function: pop_noop | |
866 | * | |
867 | * Purpose: Send a noop command to the server. | |
868 | * | |
869 | * Argument: | |
870 | * server The server to send to. | |
871 | * | |
872 | * Return value: 0 on success, non-zero with error in pop_error | |
873 | * otherwise. | |
874 | * | |
875 | * Side effects: Closes connection on error. | |
876 | */ | |
877 | int | |
878 | pop_noop (server) | |
879 | popserver server; | |
880 | { | |
881 | if (server->in_multi) | |
882 | { | |
883 | strcpy (pop_error, "In multi-line query in pop_noop"); | |
884 | return (-1); | |
885 | } | |
886 | ||
887 | if (sendline (server, "NOOP") || getok (server)) | |
888 | return (-1); | |
889 | ||
890 | return (0); | |
891 | } | |
892 | ||
893 | /* | |
894 | * Function: pop_last | |
895 | * | |
896 | * Purpose: Find out the highest seen message from the server. | |
897 | * | |
898 | * Arguments: | |
899 | * server The server. | |
900 | * | |
901 | * Return value: If successful, the highest seen message, which is | |
902 | * greater than or equal to 0. Otherwise, a negative number with | |
903 | * the error explained in pop_error. | |
904 | * | |
905 | * Side effects: Closes the connection on error. | |
906 | */ | |
907 | int | |
908 | pop_last (server) | |
909 | popserver server; | |
910 | { | |
911 | char *fromserver; | |
912 | ||
913 | if (server->in_multi) | |
914 | { | |
915 | strcpy (pop_error, "In multi-line query in pop_last"); | |
916 | return (-1); | |
917 | } | |
918 | ||
919 | if (sendline (server, "LAST")) | |
920 | return (-1); | |
921 | ||
d89d0243 | 922 | if (getline (server, &fromserver) < 0) |
9c0f2dac RS |
923 | return (-1); |
924 | ||
925 | if (! strncmp (fromserver, "-ERR", 4)) | |
926 | { | |
927 | strncpy (pop_error, fromserver, ERROR_MAX); | |
928 | return (-1); | |
929 | } | |
930 | else if (strncmp (fromserver, "+OK ", 4)) | |
931 | { | |
932 | strcpy (pop_error, "Unexpected response from server in pop_last"); | |
933 | pop_trash (server); | |
934 | return (-1); | |
935 | } | |
936 | else | |
937 | { | |
938 | return (atoi (&fromserver[4])); | |
939 | } | |
940 | } | |
941 | ||
942 | /* | |
943 | * Function: pop_reset | |
944 | * | |
945 | * Purpose: Reset the server to its initial connect state | |
946 | * | |
947 | * Arguments: | |
948 | * server The server. | |
949 | * | |
950 | * Return value: 0 for success, non-0 with error in pop_error | |
951 | * otherwise. | |
952 | * | |
953 | * Side effects: Closes the connection on error. | |
954 | */ | |
955 | int | |
956 | pop_reset (server) | |
957 | popserver server; | |
958 | { | |
959 | if (pop_retrieve_flush (server)) | |
960 | { | |
961 | return (-1); | |
962 | } | |
963 | ||
964 | if (sendline (server, "RSET") || getok (server)) | |
965 | return (-1); | |
966 | ||
967 | return (0); | |
968 | } | |
969 | ||
970 | /* | |
971 | * Function: pop_quit | |
972 | * | |
973 | * Purpose: Quit the connection to the server, | |
974 | * | |
975 | * Arguments: | |
976 | * server The server to quit. | |
977 | * | |
978 | * Return value: 0 for success, non-zero otherwise with error in | |
979 | * pop_error. | |
980 | * | |
8e6208c5 | 981 | * Side Effects: The popserver passed in is unusable after this |
9c0f2dac RS |
982 | * function is called, even if an error occurs. |
983 | */ | |
984 | int | |
985 | pop_quit (server) | |
986 | popserver server; | |
987 | { | |
988 | int ret = 0; | |
989 | ||
990 | if (server->file >= 0) | |
991 | { | |
992 | if (pop_retrieve_flush (server)) | |
993 | { | |
994 | ret = -1; | |
995 | } | |
996 | ||
997 | if (sendline (server, "QUIT") || getok (server)) | |
998 | { | |
999 | ret = -1; | |
1000 | } | |
1001 | ||
1002 | close (server->file); | |
1003 | } | |
1004 | ||
1005 | if (server->buffer) | |
1006 | free (server->buffer); | |
1007 | free ((char *) server); | |
1008 | ||
1009 | return (ret); | |
1010 | } | |
1011 | ||
c2668a61 RS |
1012 | #ifdef WINDOWSNT |
1013 | static int have_winsock = 0; | |
1014 | #endif | |
1015 | ||
9c0f2dac RS |
1016 | /* |
1017 | * Function: socket_connection | |
1018 | * | |
1019 | * Purpose: Opens the network connection with the mail host, without | |
1020 | * doing any sort of I/O with it or anything. | |
1021 | * | |
1022 | * Arguments: | |
1023 | * host The host to which to connect. | |
1024 | * flags Option flags. | |
1025 | * | |
1026 | * Return value: A file descriptor indicating the connection, or -1 | |
1027 | * indicating failure, in which case an error has been copied | |
1028 | * into pop_error. | |
1029 | */ | |
1030 | static int | |
1031 | socket_connection (host, flags) | |
1032 | char *host; | |
1033 | int flags; | |
1034 | { | |
1035 | struct hostent *hostent; | |
1036 | struct servent *servent; | |
1037 | struct sockaddr_in addr; | |
1038 | char found_port = 0; | |
1039 | char *service; | |
1040 | int sock; | |
1041 | #ifdef KERBEROS | |
a27738b6 | 1042 | #ifdef KERBEROS5 |
9c0f2dac | 1043 | krb5_error_code rem; |
a27738b6 RS |
1044 | krb5_context kcontext = 0; |
1045 | krb5_auth_context auth_context = 0; | |
9c0f2dac RS |
1046 | krb5_ccache ccdef; |
1047 | krb5_principal client, server; | |
1048 | krb5_error *err_ret; | |
1049 | register char *cp; | |
1050 | #else | |
1051 | KTEXT ticket; | |
1052 | MSG_DAT msg_data; | |
1053 | CREDENTIALS cred; | |
1054 | Key_schedule schedule; | |
1055 | int rem; | |
51a66525 | 1056 | char *realhost; |
a27738b6 | 1057 | #endif /* KERBEROS5 */ |
9c0f2dac RS |
1058 | #endif /* KERBEROS */ |
1059 | ||
1060 | int try_count = 0; | |
1061 | ||
c2668a61 RS |
1062 | #ifdef WINDOWSNT |
1063 | { | |
1064 | WSADATA winsockData; | |
1065 | if (WSAStartup (0x101, &winsockData) == 0) | |
1066 | have_winsock = 1; | |
1067 | } | |
1068 | #endif | |
1069 | ||
9c0f2dac RS |
1070 | do |
1071 | { | |
1072 | hostent = gethostbyname (host); | |
1073 | try_count++; | |
1074 | if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5))) | |
1075 | { | |
1076 | strcpy (pop_error, "Could not determine POP server's address"); | |
1077 | return (-1); | |
1078 | } | |
1079 | } while (! hostent); | |
1080 | ||
1081 | bzero ((char *) &addr, sizeof (addr)); | |
1082 | addr.sin_family = AF_INET; | |
1083 | ||
1084 | #ifdef KERBEROS | |
1085 | service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE; | |
1086 | #else | |
1087 | service = POP_SERVICE; | |
1088 | #endif | |
1089 | ||
1090 | #ifdef HESIOD | |
1091 | if (! (flags & POP_NO_HESIOD)) | |
1092 | { | |
1093 | servent = hes_getservbyname (service, "tcp"); | |
1094 | if (servent) | |
1095 | { | |
1096 | addr.sin_port = servent->s_port; | |
1097 | found_port = 1; | |
1098 | } | |
1099 | } | |
1100 | #endif | |
1101 | if (! found_port) | |
1102 | { | |
1103 | servent = getservbyname (service, "tcp"); | |
1104 | if (servent) | |
1105 | { | |
1106 | addr.sin_port = servent->s_port; | |
1107 | } | |
1108 | else | |
1109 | { | |
1110 | #ifdef KERBEROS | |
1111 | addr.sin_port = htons ((flags & POP_NO_KERBEROS) ? | |
1112 | POP_PORT : KPOP_PORT); | |
1113 | #else | |
1114 | addr.sin_port = htons (POP_PORT); | |
1115 | #endif | |
1116 | } | |
1117 | } | |
1118 | ||
a27738b6 | 1119 | #define POP_SOCKET_ERROR "Could not create socket for POP connection: " |
9c0f2dac RS |
1120 | |
1121 | sock = socket (PF_INET, SOCK_STREAM, 0); | |
1122 | if (sock < 0) | |
1123 | { | |
a27738b6 | 1124 | strcpy (pop_error, POP_SOCKET_ERROR); |
9c0f2dac | 1125 | strncat (pop_error, strerror (errno), |
a27738b6 | 1126 | ERROR_MAX - sizeof (POP_SOCKET_ERROR)); |
9c0f2dac RS |
1127 | return (-1); |
1128 | ||
1129 | } | |
1130 | ||
1131 | while (*hostent->h_addr_list) | |
1132 | { | |
1133 | bcopy (*hostent->h_addr_list, (char *) &addr.sin_addr, | |
1134 | hostent->h_length); | |
1135 | if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr))) | |
1136 | break; | |
1137 | hostent->h_addr_list++; | |
1138 | } | |
1139 | ||
1140 | #define CONNECT_ERROR "Could not connect to POP server: " | |
1141 | ||
1142 | if (! *hostent->h_addr_list) | |
1143 | { | |
de5c39cf | 1144 | CLOSESOCKET (sock); |
9c0f2dac RS |
1145 | strcpy (pop_error, CONNECT_ERROR); |
1146 | strncat (pop_error, strerror (errno), | |
1147 | ERROR_MAX - sizeof (CONNECT_ERROR)); | |
1148 | return (-1); | |
1149 | ||
1150 | } | |
1151 | ||
1152 | #ifdef KERBEROS | |
1153 | #define KRB_ERROR "Kerberos error connecting to POP server: " | |
1154 | if (! (flags & POP_NO_KERBEROS)) | |
1155 | { | |
a27738b6 RS |
1156 | #ifdef KERBEROS5 |
1157 | if ((rem = krb5_init_context (&kcontext))) | |
9c0f2dac RS |
1158 | { |
1159 | krb5error: | |
a27738b6 RS |
1160 | if (auth_context) |
1161 | krb5_auth_con_free (kcontext, auth_context); | |
1162 | if (kcontext) | |
1163 | krb5_free_context (kcontext); | |
9c0f2dac RS |
1164 | strcpy (pop_error, KRB_ERROR); |
1165 | strncat (pop_error, error_message (rem), | |
1166 | ERROR_MAX - sizeof(KRB_ERROR)); | |
de5c39cf | 1167 | CLOSESOCKET (sock); |
9c0f2dac RS |
1168 | return (-1); |
1169 | } | |
1170 | ||
a27738b6 RS |
1171 | if ((rem = krb5_auth_con_init (kcontext, &auth_context))) |
1172 | goto krb5error; | |
1173 | ||
1174 | if (rem = krb5_cc_default (kcontext, &ccdef)) | |
1175 | goto krb5error; | |
1176 | ||
1177 | if (rem = krb5_cc_get_principal (kcontext, ccdef, &client)) | |
1178 | goto krb5error; | |
9c0f2dac RS |
1179 | |
1180 | for (cp = hostent->h_name; *cp; cp++) | |
1181 | { | |
1182 | if (isupper (*cp)) | |
1183 | { | |
1184 | *cp = tolower (*cp); | |
1185 | } | |
1186 | } | |
1187 | ||
a27738b6 RS |
1188 | if (rem = krb5_sname_to_principal (kcontext, hostent->h_name, |
1189 | POP_SERVICE, FALSE, &server)) | |
1190 | goto krb5error; | |
9c0f2dac | 1191 | |
a27738b6 RS |
1192 | rem = krb5_sendauth (kcontext, &auth_context, |
1193 | (krb5_pointer) &sock, "KPOPV1.0", client, server, | |
9c0f2dac RS |
1194 | AP_OPTS_MUTUAL_REQUIRED, |
1195 | 0, /* no checksum */ | |
1196 | 0, /* no creds, use ccache instead */ | |
1197 | ccdef, | |
9c0f2dac | 1198 | &err_ret, |
a27738b6 | 1199 | 0, /* don't need subsession key */ |
9c0f2dac | 1200 | 0); /* don't need reply */ |
a27738b6 | 1201 | krb5_free_principal (kcontext, server); |
9c0f2dac RS |
1202 | if (rem) |
1203 | { | |
1204 | if (err_ret && err_ret->text.length) | |
1205 | { | |
1206 | strcpy (pop_error, KRB_ERROR); | |
1207 | strncat (pop_error, error_message (rem), | |
1208 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1209 | strncat (pop_error, " [server says '", | |
1210 | ERROR_MAX - strlen (pop_error) - 1); | |
1211 | strncat (pop_error, err_ret->text.data, | |
1212 | min (ERROR_MAX - strlen (pop_error) - 1, | |
1213 | err_ret->text.length)); | |
1214 | strncat (pop_error, "']", | |
1215 | ERROR_MAX - strlen (pop_error) - 1); | |
1216 | } | |
1217 | else | |
1218 | { | |
1219 | strcpy (pop_error, KRB_ERROR); | |
1220 | strncat (pop_error, error_message (rem), | |
1221 | ERROR_MAX - sizeof (KRB_ERROR)); | |
1222 | } | |
1223 | if (err_ret) | |
a27738b6 RS |
1224 | krb5_free_error (kcontext, err_ret); |
1225 | krb5_auth_con_free (kcontext, auth_context); | |
1226 | krb5_free_context (kcontext); | |
9c0f2dac | 1227 | |
de5c39cf | 1228 | CLOSESOCKET (sock); |
9c0f2dac RS |
1229 | return (-1); |
1230 | } | |
a27738b6 | 1231 | #else /* ! KERBEROS5 */ |
9c0f2dac | 1232 | ticket = (KTEXT) malloc (sizeof (KTEXT_ST)); |
51a66525 CH |
1233 | realhost = strdup (hostent->h_name); |
1234 | rem = krb_sendauth (0L, sock, ticket, "pop", realhost, | |
1235 | (char *) krb_realmofhost (realhost), | |
9c0f2dac RS |
1236 | (unsigned long) 0, &msg_data, &cred, schedule, |
1237 | (struct sockaddr_in *) 0, | |
1238 | (struct sockaddr_in *) 0, | |
1239 | "KPOPV0.1"); | |
1240 | free ((char *) ticket); | |
6a7eabe0 | 1241 | free (realhost); |
9c0f2dac RS |
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 | /* | |
1258 | * Function: getline | |
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 RS |
1273 | * |
1274 | * Notes: The line returned is overwritten with each call to getline. | |
1275 | * | |
1276 | * Side effects: Closes the connection on error. | |
d89d0243 KH |
1277 | * |
1278 | * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS! | |
9c0f2dac | 1279 | */ |
d89d0243 KH |
1280 | static int |
1281 | getline (server, line) | |
9c0f2dac | 1282 | popserver server; |
d89d0243 | 1283 | char **line; |
9c0f2dac RS |
1284 | { |
1285 | #define GETLINE_ERROR "Error reading from server: " | |
1286 | ||
1287 | int ret; | |
b6606ad8 RS |
1288 | int search_offset = 0; |
1289 | ||
9c0f2dac RS |
1290 | if (server->data) |
1291 | { | |
d89d0243 KH |
1292 | char *cp = find_crlf (server->buffer + server->buffer_index, |
1293 | server->data); | |
9c0f2dac RS |
1294 | if (cp) |
1295 | { | |
1296 | int found; | |
1297 | int data_used; | |
1298 | ||
1299 | found = server->buffer_index; | |
1300 | data_used = (cp + 2) - server->buffer - found; | |
1301 | ||
1302 | *cp = '\0'; /* terminate the string to be returned */ | |
1303 | server->data -= data_used; | |
1304 | server->buffer_index += data_used; | |
1305 | ||
1306 | if (pop_debug) | |
d89d0243 KH |
1307 | /* Embedded nulls will truncate this output prematurely, |
1308 | but that's OK because it's just for debugging anyway. */ | |
9c0f2dac | 1309 | fprintf (stderr, "<<< %s\n", server->buffer + found); |
d89d0243 KH |
1310 | *line = server->buffer + found; |
1311 | return (data_used - 2); | |
9c0f2dac RS |
1312 | } |
1313 | else | |
1314 | { | |
1315 | bcopy (server->buffer + server->buffer_index, | |
1316 | server->buffer, server->data); | |
b6606ad8 RS |
1317 | /* Record the fact that we've searched the data already in |
1318 | the buffer for a CRLF, so that when we search below, we | |
1319 | don't have to search the same data twice. There's a "- | |
1320 | 1" here to account for the fact that the last character | |
1321 | of the data we have may be the CR of a CRLF pair, of | |
1322 | which we haven't read the second half yet, so we may have | |
1323 | to search it again when we read more data. */ | |
1324 | search_offset = server->data - 1; | |
9c0f2dac RS |
1325 | server->buffer_index = 0; |
1326 | } | |
1327 | } | |
1328 | else | |
1329 | { | |
1330 | server->buffer_index = 0; | |
1331 | } | |
1332 | ||
1333 | while (1) | |
1334 | { | |
b6606ad8 RS |
1335 | /* There's a "- 1" here to leave room for the null that we put |
1336 | at the end of the read data below. We put the null there so | |
1337 | that find_crlf knows where to stop when we call it. */ | |
1338 | if (server->data == server->buffer_size - 1) | |
9c0f2dac RS |
1339 | { |
1340 | server->buffer_size += GETLINE_INCR; | |
7d665945 | 1341 | server->buffer = (char *)realloc (server->buffer, server->buffer_size); |
9c0f2dac RS |
1342 | if (! server->buffer) |
1343 | { | |
1344 | strcpy (pop_error, "Out of memory in getline"); | |
1345 | pop_trash (server); | |
d89d0243 | 1346 | return (-1); |
9c0f2dac RS |
1347 | } |
1348 | } | |
de5c39cf | 1349 | ret = RECV (server->file, server->buffer + server->data, |
c2668a61 | 1350 | server->buffer_size - server->data - 1, 0); |
9c0f2dac RS |
1351 | if (ret < 0) |
1352 | { | |
1353 | strcpy (pop_error, GETLINE_ERROR); | |
1354 | strncat (pop_error, strerror (errno), | |
1355 | ERROR_MAX - sizeof (GETLINE_ERROR)); | |
1356 | pop_trash (server); | |
d89d0243 | 1357 | return (-1); |
9c0f2dac RS |
1358 | } |
1359 | else if (ret == 0) | |
1360 | { | |
1361 | strcpy (pop_error, "Unexpected EOF from server in getline"); | |
1362 | pop_trash (server); | |
d89d0243 | 1363 | return (-1); |
9c0f2dac RS |
1364 | } |
1365 | else | |
1366 | { | |
7a481e50 | 1367 | char *cp; |
9c0f2dac | 1368 | server->data += ret; |
7a481e50 | 1369 | server->buffer[server->data] = '\0'; |
9c0f2dac | 1370 | |
d89d0243 KH |
1371 | cp = find_crlf (server->buffer + search_offset, |
1372 | server->data - search_offset); | |
9c0f2dac RS |
1373 | if (cp) |
1374 | { | |
1375 | int data_used = (cp + 2) - server->buffer; | |
1376 | *cp = '\0'; | |
1377 | server->data -= data_used; | |
1378 | server->buffer_index = data_used; | |
1379 | ||
1380 | if (pop_debug) | |
1381 | fprintf (stderr, "<<< %s\n", server->buffer); | |
d89d0243 KH |
1382 | *line = server->buffer; |
1383 | return (data_used - 2); | |
9c0f2dac | 1384 | } |
a8f44d07 RS |
1385 | /* As above, the "- 1" here is to account for the fact that |
1386 | we may have read a CR without its accompanying LF. */ | |
1387 | search_offset += ret - 1; | |
9c0f2dac RS |
1388 | } |
1389 | } | |
1390 | ||
1391 | /* NOTREACHED */ | |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * Function: sendline | |
1396 | * | |
1397 | * Purpose: Sends a line of text to the POP server. The line of text | |
1398 | * passed into this function should NOT have the carriage return | |
1399 | * and linefeed on the end of it. Periods at beginnings of lines | |
1400 | * will NOT be treated specially by this function. | |
1401 | * | |
1402 | * Arguments: | |
1403 | * server The server to which to send the text. | |
1404 | * line The line of text to send. | |
1405 | * | |
1406 | * Return value: Upon successful completion, a value of 0 will be | |
1407 | * returned. Otherwise, a non-zero value will be returned, and | |
1408 | * an error will be copied into pop_error. | |
1409 | * | |
1410 | * Side effects: Closes the connection on error. | |
1411 | */ | |
1412 | static int | |
1413 | sendline (server, line) | |
1414 | popserver server; | |
1415 | char *line; | |
1416 | { | |
1417 | #define SENDLINE_ERROR "Error writing to POP server: " | |
1418 | int ret; | |
1419 | ||
1420 | ret = fullwrite (server->file, line, strlen (line)); | |
1421 | if (ret >= 0) | |
1422 | { /* 0 indicates that a blank line was written */ | |
1423 | ret = fullwrite (server->file, "\r\n", 2); | |
1424 | } | |
1425 | ||
1426 | if (ret < 0) | |
1427 | { | |
1428 | pop_trash (server); | |
1429 | strcpy (pop_error, SENDLINE_ERROR); | |
1430 | strncat (pop_error, strerror (errno), | |
1431 | ERROR_MAX - sizeof (SENDLINE_ERROR)); | |
1432 | return (ret); | |
1433 | } | |
1434 | ||
1435 | if (pop_debug) | |
1436 | fprintf (stderr, ">>> %s\n", line); | |
1437 | ||
1438 | return (0); | |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * Procedure: fullwrite | |
1443 | * | |
1444 | * Purpose: Just like write, but keeps trying until the entire string | |
1445 | * has been written. | |
1446 | * | |
1447 | * Return value: Same as write. Pop_error is not set. | |
1448 | */ | |
1449 | static int | |
1450 | fullwrite (fd, buf, nbytes) | |
1451 | int fd; | |
1452 | char *buf; | |
1453 | int nbytes; | |
1454 | { | |
1455 | char *cp; | |
9d3f4cee | 1456 | int ret = 0; |
9c0f2dac RS |
1457 | |
1458 | cp = buf; | |
9d3f4cee | 1459 | while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0)) |
9c0f2dac RS |
1460 | { |
1461 | cp += ret; | |
1462 | nbytes -= ret; | |
1463 | } | |
1464 | ||
1465 | return (ret); | |
1466 | } | |
1467 | ||
1468 | /* | |
1469 | * Procedure getok | |
1470 | * | |
1471 | * Purpose: Reads a line from the server. If the return indicator is | |
1472 | * positive, return with a zero exit status. If not, return with | |
1473 | * a negative exit status. | |
1474 | * | |
1475 | * Arguments: | |
1476 | * server The server to read from. | |
1477 | * | |
1478 | * Returns: 0 for success, else for failure and puts error in pop_error. | |
1479 | * | |
8e6208c5 | 1480 | * Side effects: On failure, may make the connection unusable. |
9c0f2dac RS |
1481 | */ |
1482 | static int | |
1483 | getok (server) | |
1484 | popserver server; | |
1485 | { | |
1486 | char *fromline; | |
1487 | ||
d89d0243 | 1488 | if (getline (server, &fromline) < 0) |
9c0f2dac RS |
1489 | { |
1490 | return (-1); | |
1491 | } | |
1492 | ||
1493 | if (! strncmp (fromline, "+OK", 3)) | |
1494 | return (0); | |
1495 | else if (! strncmp (fromline, "-ERR", 4)) | |
1496 | { | |
1497 | strncpy (pop_error, fromline, ERROR_MAX); | |
1498 | pop_error[ERROR_MAX-1] = '\0'; | |
1499 | return (-1); | |
1500 | } | |
1501 | else | |
1502 | { | |
1503 | strcpy (pop_error, | |
1504 | "Unexpected response from server; expecting +OK or -ERR"); | |
1505 | pop_trash (server); | |
1506 | return (-1); | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | #if 0 | |
1511 | /* | |
1512 | * Function: gettermination | |
1513 | * | |
1514 | * Purpose: Gets the next line and verifies that it is a termination | |
1515 | * line (nothing but a dot). | |
1516 | * | |
1517 | * Return value: 0 on success, non-zero with pop_error set on error. | |
1518 | * | |
1519 | * Side effects: Closes the connection on error. | |
1520 | */ | |
1521 | static int | |
1522 | gettermination (server) | |
1523 | popserver server; | |
1524 | { | |
1525 | char *fromserver; | |
1526 | ||
d89d0243 | 1527 | if (getline (server, &fromserver) < 0) |
9c0f2dac RS |
1528 | return (-1); |
1529 | ||
1530 | if (strcmp (fromserver, ".")) | |
1531 | { | |
1532 | strcpy (pop_error, | |
1533 | "Unexpected response from server in gettermination"); | |
1534 | pop_trash (server); | |
1535 | return (-1); | |
1536 | } | |
1537 | ||
1538 | return (0); | |
1539 | } | |
1540 | #endif | |
1541 | ||
1542 | /* | |
1543 | * Function pop_close | |
1544 | * | |
1545 | * Purpose: Close a pop connection, sending a "RSET" command to try to | |
1546 | * preserve any changes that were made and a "QUIT" command to | |
1547 | * try to get the server to quit, but ignoring any responses that | |
1548 | * are received. | |
1549 | * | |
8e6208c5 | 1550 | * Side effects: The server is unusable after this function returns. |
9c0f2dac RS |
1551 | * Changes made to the maildrop since the session was started (or |
1552 | * since the last pop_reset) may be lost. | |
1553 | */ | |
1554 | void | |
1555 | pop_close (server) | |
1556 | popserver server; | |
1557 | { | |
1558 | pop_trash (server); | |
1559 | free ((char *) server); | |
1560 | ||
1561 | return; | |
1562 | } | |
1563 | ||
1564 | /* | |
1565 | * Function: pop_trash | |
1566 | * | |
1567 | * Purpose: Like pop_close or pop_quit, but doesn't deallocate the | |
1568 | * memory associated with the server. It is legal to call | |
1569 | * pop_close or pop_quit after this function has been called. | |
1570 | */ | |
1571 | static void | |
1572 | pop_trash (server) | |
1573 | popserver server; | |
1574 | { | |
1575 | if (server->file >= 0) | |
1576 | { | |
c2668a61 RS |
1577 | /* avoid recursion; sendline can call pop_trash */ |
1578 | if (server->trash_started) | |
1579 | return; | |
1580 | server->trash_started = 1; | |
de5c39cf | 1581 | |
9c0f2dac RS |
1582 | sendline (server, "RSET"); |
1583 | sendline (server, "QUIT"); | |
1584 | ||
de5c39cf | 1585 | CLOSESOCKET (server->file); |
9c0f2dac RS |
1586 | server->file = -1; |
1587 | if (server->buffer) | |
1588 | { | |
1589 | free (server->buffer); | |
1590 | server->buffer = 0; | |
1591 | } | |
1592 | } | |
c2668a61 RS |
1593 | |
1594 | #ifdef WINDOWSNT | |
1595 | if (have_winsock) | |
1596 | WSACleanup (); | |
1597 | #endif | |
9c0f2dac RS |
1598 | } |
1599 | ||
d89d0243 KH |
1600 | /* Return a pointer to the first CRLF in IN_STRING, which can contain |
1601 | embedded nulls and has LEN characters in it not including the final | |
1602 | null, or 0 if it does not contain one. */ | |
9c0f2dac RS |
1603 | |
1604 | static char * | |
d89d0243 | 1605 | find_crlf (in_string, len) |
8148baf9 | 1606 | char *in_string; |
d89d0243 | 1607 | 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 */ |