|
428
|
1 /* pop.c: client routines for talking to a POP3-protocol post-office server
|
|
3650
|
2 Copyright (C) 1991, 1993, 1996, 1997, 1999, 2002, 2003, 2004,
|
|
|
3 2005, 2006 Free Software Foundation, Inc.
|
|
771
|
4 Copyright (C) 2001 Ben Wing.
|
|
428
|
5 Written by Jonathan Kamens, jik@security.ov.com.
|
|
|
6
|
|
613
|
7 This file is part of XEmacs.
|
|
428
|
8
|
|
613
|
9 XEmacs is free software; you can redistribute it and/or modify
|
|
428
|
10 it under the terms of the GNU General Public License as published by
|
|
|
11 the Free Software Foundation; either version 2, or (at your option)
|
|
|
12 any later version.
|
|
|
13
|
|
613
|
14 XEmacs is distributed in the hope that it will be useful,
|
|
428
|
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
17 GNU General Public License for more details.
|
|
|
18
|
|
|
19 You should have received a copy of the GNU General Public License
|
|
613
|
20 along with XEmacs; see the file COPYING. If not, write to
|
|
3650
|
21 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
|
22 Boston, MA 02110-1301, USA. */
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|
|
23
|
|
|
24 /* Synched up with: FSF 22.0.50. */
|
|
428
|
25
|
|
|
26 #ifdef HAVE_CONFIG_H
|
|
|
27 #define NO_SHORTNAMES /* Tell config not to load remap.h */
|
|
438
|
28 #include <config.h>
|
|
428
|
29 #else
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|
|
30 #define MAIL_USE_POP
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|
|
31 #endif
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|
|
32
|
|
|
33 #ifdef MAIL_USE_POP
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|
|
34
|
|
|
35 #include <sys/types.h>
|
|
442
|
36 #ifdef WIN32_NATIVE
|
|
428
|
37 #include <winsock.h>
|
|
|
38 #undef SOCKET_ERROR
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|
|
39 #define RECV(s,buf,len,flags) recv(s,buf,len,flags)
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|
|
40 #define SEND(s,buf,len,flags) send(s,buf,len,flags)
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|
|
41 #define CLOSESOCKET(s) closesocket(s)
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|
|
42 #else
|
|
|
43 #include <netinet/in.h>
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|
|
44 #include <sys/socket.h>
|
|
|
45 #define RECV(s,buf,len,flags) read(s,buf,len)
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|
|
46 #define SEND(s,buf,len,flags) write(s,buf,len)
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|
|
47 #define CLOSESOCKET(s) close(s)
|
|
|
48 #endif
|
|
|
49 #include "pop.h"
|
|
2286
|
50 #include "compiler.h"
|
|
428
|
51
|
|
|
52 #ifdef sun
|
|
|
53 #include <malloc.h>
|
|
|
54 #endif /* sun */
|
|
|
55
|
|
|
56 #ifdef HESIOD
|
|
|
57 #include <hesiod.h>
|
|
|
58 /*
|
|
|
59 * It really shouldn't be necessary to put this declaration here, but
|
|
|
60 * the version of hesiod.h that Athena has installed in release 7.2
|
|
|
61 * doesn't declare this function; I don't know if the 7.3 version of
|
|
|
62 * hesiod.h does.
|
|
|
63 */
|
|
|
64 extern struct servent *hes_getservbyname (/* char *, char * */);
|
|
|
65 #endif
|
|
|
66
|
|
442
|
67 #include "../src/syspwd.h"
|
|
|
68 #ifndef WIN32_NATIVE
|
|
428
|
69 #include <netdb.h>
|
|
442
|
70 #endif
|
|
428
|
71 #include <errno.h>
|
|
|
72 #include <stdio.h>
|
|
|
73
|
|
442
|
74 #ifdef HAVE_UNISTD_H
|
|
428
|
75 #include <unistd.h>
|
|
442
|
76 #endif
|
|
428
|
77 #include <sys/stat.h>
|
|
442
|
78 #ifndef WIN32_NATIVE
|
|
428
|
79 #include <sys/file.h>
|
|
442
|
80 #endif
|
|
428
|
81 #include "../src/syswait.h"
|
|
442
|
82 #ifndef WIN32_NATIVE
|
|
428
|
83 #include "../src/systime.h"
|
|
|
84 #endif
|
|
|
85 #include <stdlib.h>
|
|
|
86 #include <string.h>
|
|
|
87
|
|
|
88 #ifdef KERBEROS
|
|
|
89 #ifndef KRB5
|
|
|
90 #include <des.h>
|
|
|
91 #include <krb.h>
|
|
|
92 #else /* KRB5 */
|
|
|
93 #include <krb5/krb5.h>
|
|
|
94 #include <krb5/ext-proto.h>
|
|
|
95 #include <ctype.h>
|
|
|
96 #endif /* KRB5 */
|
|
|
97 #endif /* KERBEROS */
|
|
|
98
|
|
|
99 #ifdef KERBEROS
|
|
|
100 #ifndef KRB5
|
|
|
101 extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *,
|
|
3650
|
102 u_long, MSG_DAT *, CREDENTIALS *, Key_schedule,
|
|
428
|
103 struct sockaddr_in *, struct sockaddr_in *,
|
|
|
104 char * */);
|
|
|
105 extern char *krb_realmofhost (/* char * */);
|
|
|
106 #endif /* ! KRB5 */
|
|
|
107 #endif /* KERBEROS */
|
|
|
108
|
|
442
|
109 #ifndef WIN32_NATIVE
|
|
428
|
110 #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H)
|
|
|
111 extern int h_errno;
|
|
|
112 #endif
|
|
|
113 #endif
|
|
|
114
|
|
|
115 static int socket_connection (char *, int);
|
|
3650
|
116 static int pop_getline (popserver, char **);
|
|
428
|
117 static int sendline (popserver, char *);
|
|
|
118 static int fullwrite (int, char *, int);
|
|
|
119 static int getok (popserver);
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|
|
120 #if 0
|
|
|
121 static int gettermination (popserver);
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|
|
122 #endif
|
|
|
123 static void pop_trash (popserver);
|
|
3650
|
124 static char *find_crlf (char *, int);
|
|
428
|
125
|
|
3650
|
126 #define ERROR_MAX 160 /* a pretty arbitrary size, but needs
|
|
|
127 to be bigger than the original
|
|
|
128 value of 80 */
|
|
428
|
129 #define POP_PORT 110
|
|
|
130 #define KPOP_PORT 1109
|
|
442
|
131 #if defined(WIN32_NATIVE) || defined(CYGWIN)
|
|
428
|
132 #define POP_SERVICE "pop3" /* we don't want the POP2 port! */
|
|
|
133 #else
|
|
|
134 #define POP_SERVICE "pop"
|
|
|
135 #endif
|
|
|
136 #ifdef KERBEROS
|
|
|
137 #ifdef KRB5
|
|
3650
|
138 #define KPOP_SERVICE "k5pop"
|
|
428
|
139 #else
|
|
|
140 #define KPOP_SERVICE "kpop"
|
|
|
141 #endif
|
|
|
142 #endif
|
|
|
143
|
|
|
144 char pop_error[ERROR_MAX];
|
|
|
145 int pop_debug = 0;
|
|
|
146
|
|
|
147 #ifndef min
|
|
|
148 #define min(a,b) (((a) < (b)) ? (a) : (b))
|
|
|
149 #endif
|
|
|
150
|
|
|
151 /*
|
|
|
152 * Function: pop_open (char *host, char *username, char *password,
|
|
|
153 * int flags)
|
|
|
154 *
|
|
|
155 * Purpose: Establishes a connection with a post-office server, and
|
|
|
156 * completes the authorization portion of the session.
|
|
|
157 *
|
|
|
158 * Arguments:
|
|
|
159 * host The server host with which the connection should be
|
|
|
160 * established. Optional. If omitted, internal
|
|
|
161 * heuristics will be used to determine the server host,
|
|
|
162 * if possible.
|
|
|
163 * username
|
|
|
164 * The username of the mail-drop to access. Optional.
|
|
|
165 * If omitted, internal heuristics will be used to
|
|
|
166 * determine the username, if possible.
|
|
|
167 * password
|
|
|
168 * The password to use for authorization. If omitted,
|
|
|
169 * internal heuristics will be used to determine the
|
|
|
170 * password, if possible.
|
|
|
171 * flags A bit mask containing flags controlling certain
|
|
|
172 * functions of the routine. Valid flags are defined in
|
|
|
173 * the file pop.h
|
|
|
174 *
|
|
|
175 * Return value: Upon successful establishment of a connection, a
|
|
|
176 * non-null popserver will be returned. Otherwise, null will be
|
|
|
177 * returned, and the string variable pop_error will contain an
|
|
|
178 * explanation of the error.
|
|
|
179 */
|
|
|
180 popserver
|
|
|
181 pop_open (char *host, char *username, char *password, int flags)
|
|
|
182 {
|
|
|
183 int sock;
|
|
|
184 popserver server;
|
|
|
185
|
|
|
186 /* Determine the user name */
|
|
|
187 if (! username)
|
|
|
188 {
|
|
|
189 username = getenv ("USER");
|
|
|
190 if (! (username && *username))
|
|
|
191 {
|
|
442
|
192 #ifndef WIN32_NATIVE
|
|
428
|
193 username = getlogin ();
|
|
|
194 if (! (username && *username))
|
|
|
195 {
|
|
|
196 struct passwd *passwd;
|
|
|
197 passwd = getpwuid (getuid ());
|
|
|
198 if (passwd && passwd->pw_name && *passwd->pw_name)
|
|
|
199 {
|
|
|
200 username = passwd->pw_name;
|
|
|
201 }
|
|
|
202 else
|
|
|
203 {
|
|
|
204 strcpy (pop_error, "Could not determine username");
|
|
|
205 return (0);
|
|
|
206 }
|
|
|
207 }
|
|
|
208 #else
|
|
|
209 strcpy (pop_error, "Could not determine username");
|
|
|
210 return (0);
|
|
|
211 #endif
|
|
|
212 }
|
|
|
213 }
|
|
|
214
|
|
|
215 /*
|
|
|
216 * Determine the mail host.
|
|
|
217 */
|
|
|
218
|
|
|
219 if (! host)
|
|
|
220 {
|
|
|
221 host = getenv ("MAILHOST");
|
|
|
222 }
|
|
|
223
|
|
|
224 #ifdef HESIOD
|
|
|
225 if ((! host) && (! (flags & POP_NO_HESIOD)))
|
|
|
226 {
|
|
|
227 struct hes_postoffice *office;
|
|
|
228 office = hes_getmailhost (username);
|
|
|
229 if (office && office->po_type && (! strcmp (office->po_type, "POP"))
|
|
|
230 && office->po_name && *office->po_name && office->po_host
|
|
|
231 && *office->po_host)
|
|
|
232 {
|
|
|
233 host = office->po_host;
|
|
|
234 username = office->po_name;
|
|
|
235 }
|
|
|
236 }
|
|
|
237 #endif
|
|
|
238
|
|
|
239 #ifdef MAILHOST
|
|
|
240 if (! host)
|
|
|
241 {
|
|
|
242 host = MAILHOST;
|
|
|
243 }
|
|
|
244 #endif
|
|
|
245
|
|
|
246 if (! host)
|
|
|
247 {
|
|
|
248 strcpy (pop_error, "Could not determine POP server");
|
|
|
249 return (0);
|
|
|
250 }
|
|
|
251
|
|
|
252 /* Determine the password */
|
|
|
253 #ifdef KERBEROS
|
|
|
254 #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS))
|
|
|
255 #else
|
|
|
256 #define DONT_NEED_PASSWORD 0
|
|
|
257 #endif
|
|
|
258
|
|
|
259 if ((! password) && (! DONT_NEED_PASSWORD))
|
|
|
260 {
|
|
442
|
261 #ifndef WIN32_NATIVE
|
|
428
|
262 if (! (flags & POP_NO_GETPASS))
|
|
|
263 {
|
|
|
264 password = getpass ("Enter POP password:");
|
|
|
265 }
|
|
|
266 #endif
|
|
|
267 if (! password)
|
|
|
268 {
|
|
|
269 strcpy (pop_error, "Could not determine POP password");
|
|
|
270 return (0);
|
|
|
271 }
|
|
|
272 }
|
|
|
273 if (password)
|
|
|
274 flags |= POP_NO_KERBEROS;
|
|
|
275 else
|
|
|
276 password = username;
|
|
|
277
|
|
|
278 sock = socket_connection (host, flags);
|
|
|
279 if (sock == -1)
|
|
|
280 return (0);
|
|
|
281
|
|
|
282 server = (popserver) malloc (sizeof (struct _popserver));
|
|
|
283 if (! server)
|
|
|
284 {
|
|
|
285 strcpy (pop_error, "Out of memory in pop_open");
|
|
|
286 return (0);
|
|
|
287 }
|
|
|
288 server->buffer = (char *) malloc (GETLINE_MIN);
|
|
|
289 if (! server->buffer)
|
|
|
290 {
|
|
|
291 strcpy (pop_error, "Out of memory in pop_open");
|
|
|
292 free ((char *) server);
|
|
|
293 return (0);
|
|
|
294 }
|
|
|
295
|
|
|
296 server->file = sock;
|
|
|
297 server->data = 0;
|
|
|
298 server->buffer_index = 0;
|
|
|
299 server->buffer_size = GETLINE_MIN;
|
|
|
300 server->in_multi = 0;
|
|
|
301 server->trash_started = 0;
|
|
|
302
|
|
|
303 if (getok (server))
|
|
|
304 return (0);
|
|
|
305
|
|
|
306 /*
|
|
|
307 * I really shouldn't use the pop_error variable like this, but....
|
|
|
308 */
|
|
|
309 if (strlen (username) > ERROR_MAX - 6)
|
|
|
310 {
|
|
|
311 pop_close (server);
|
|
|
312 strcpy (pop_error,
|
|
|
313 "Username too long; recompile pop.c with larger ERROR_MAX");
|
|
|
314 return (0);
|
|
|
315 }
|
|
|
316 sprintf (pop_error, "USER %s", username);
|
|
|
317
|
|
|
318 if (sendline (server, pop_error) || getok (server))
|
|
|
319 {
|
|
|
320 return (0);
|
|
|
321 }
|
|
|
322
|
|
|
323 if (strlen (password) > ERROR_MAX - 6)
|
|
|
324 {
|
|
|
325 pop_close (server);
|
|
|
326 strcpy (pop_error,
|
|
|
327 "Password too long; recompile pop.c with larger ERROR_MAX");
|
|
|
328 return (0);
|
|
|
329 }
|
|
|
330 sprintf (pop_error, "PASS %s", password);
|
|
|
331
|
|
|
332 if (sendline (server, pop_error) || getok (server))
|
|
|
333 {
|
|
|
334 return (0);
|
|
|
335 }
|
|
|
336
|
|
|
337 return (server);
|
|
|
338 }
|
|
|
339
|
|
|
340 /*
|
|
|
341 * Function: pop_stat
|
|
|
342 *
|
|
|
343 * Purpose: Issue the STAT command to the server and return (in the
|
|
|
344 * value parameters) the number of messages in the maildrop and
|
|
|
345 * the total size of the maildrop.
|
|
|
346 *
|
|
|
347 * Return value: 0 on success, or non-zero with an error in pop_error
|
|
|
348 * in failure.
|
|
|
349 *
|
|
|
350 * Side effects: On failure, may make further operations on the
|
|
|
351 * connection impossible.
|
|
|
352 */
|
|
|
353 int
|
|
|
354 pop_stat (popserver server, int *count, int *size)
|
|
|
355 {
|
|
|
356 char *fromserver;
|
|
|
357
|
|
|
358 if (server->in_multi)
|
|
|
359 {
|
|
|
360 strcpy (pop_error, "In multi-line query in pop_stat");
|
|
|
361 return (-1);
|
|
|
362 }
|
|
|
363
|
|
3650
|
364 if (sendline (server, "STAT") || (pop_getline (server, &fromserver) < 0))
|
|
428
|
365 return (-1);
|
|
|
366
|
|
|
367 if (strncmp (fromserver, "+OK ", 4))
|
|
|
368 {
|
|
|
369 if (0 == strncmp (fromserver, "-ERR", 4))
|
|
|
370 {
|
|
|
371 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
372 }
|
|
|
373 else
|
|
|
374 {
|
|
|
375 strcpy (pop_error,
|
|
|
376 "Unexpected response from POP server in pop_stat");
|
|
|
377 pop_trash (server);
|
|
|
378 }
|
|
|
379 return (-1);
|
|
|
380 }
|
|
|
381
|
|
|
382 *count = atoi (&fromserver[4]);
|
|
|
383
|
|
|
384 fromserver = strchr (&fromserver[4], ' ');
|
|
|
385 if (! fromserver)
|
|
|
386 {
|
|
|
387 strcpy (pop_error,
|
|
|
388 "Badly formatted response from server in pop_stat");
|
|
|
389 pop_trash (server);
|
|
|
390 return (-1);
|
|
|
391 }
|
|
|
392
|
|
|
393 *size = atoi (fromserver + 1);
|
|
|
394
|
|
|
395 return (0);
|
|
|
396 }
|
|
|
397
|
|
|
398 /*
|
|
|
399 * Function: pop_list
|
|
|
400 *
|
|
|
401 * Purpose: Performs the POP "list" command and returns (in value
|
|
|
402 * parameters) two malloc'd zero-terminated arrays -- one of
|
|
|
403 * message IDs, and a parallel one of sizes.
|
|
|
404 *
|
|
|
405 * Arguments:
|
|
|
406 * server The pop connection to talk to.
|
|
|
407 * message The number of the one message about which to get
|
|
|
408 * information, or 0 to get information about all
|
|
|
409 * messages.
|
|
|
410 *
|
|
|
411 * Return value: 0 on success, non-zero with error in pop_error on
|
|
|
412 * failure.
|
|
|
413 *
|
|
|
414 * Side effects: On failure, may make further operations on the
|
|
|
415 * connection impossible.
|
|
|
416 */
|
|
|
417 int
|
|
|
418 pop_list (popserver server, int message, int **IDs, int **sizes)
|
|
|
419 {
|
|
|
420 int how_many, i;
|
|
|
421 char *fromserver;
|
|
|
422
|
|
|
423 if (server->in_multi)
|
|
|
424 {
|
|
|
425 strcpy (pop_error, "In multi-line query in pop_list");
|
|
|
426 return (-1);
|
|
|
427 }
|
|
|
428
|
|
|
429 if (message)
|
|
|
430 how_many = 1;
|
|
|
431 else
|
|
|
432 {
|
|
|
433 int count, size;
|
|
|
434 if (pop_stat (server, &count, &size))
|
|
|
435 return (-1);
|
|
|
436 how_many = count;
|
|
|
437 }
|
|
|
438
|
|
|
439 *IDs = (int *) malloc ((how_many + 1) * sizeof (int));
|
|
|
440 *sizes = (int *) malloc ((how_many + 1) * sizeof (int));
|
|
|
441 if (! (*IDs && *sizes))
|
|
|
442 {
|
|
|
443 strcpy (pop_error, "Out of memory in pop_list");
|
|
|
444 return (-1);
|
|
|
445 }
|
|
|
446
|
|
|
447 if (message)
|
|
|
448 {
|
|
|
449 sprintf (pop_error, "LIST %d", message);
|
|
|
450 if (sendline (server, pop_error))
|
|
|
451 {
|
|
|
452 free ((char *) *IDs);
|
|
|
453 free ((char *) *sizes);
|
|
|
454 return (-1);
|
|
|
455 }
|
|
3650
|
456 if (pop_getline (server, &fromserver) < 0)
|
|
428
|
457 {
|
|
|
458 free ((char *) *IDs);
|
|
|
459 free ((char *) *sizes);
|
|
|
460 return (-1);
|
|
|
461 }
|
|
|
462 if (strncmp (fromserver, "+OK ", 4))
|
|
|
463 {
|
|
|
464 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
465 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
466 else
|
|
|
467 {
|
|
|
468 strcpy (pop_error,
|
|
|
469 "Unexpected response from server in pop_list");
|
|
|
470 pop_trash (server);
|
|
|
471 }
|
|
|
472 free ((char *) *IDs);
|
|
|
473 free ((char *) *sizes);
|
|
|
474 return (-1);
|
|
|
475 }
|
|
|
476 (*IDs)[0] = atoi (&fromserver[4]);
|
|
|
477 fromserver = strchr (&fromserver[4], ' ');
|
|
|
478 if (! fromserver)
|
|
|
479 {
|
|
|
480 strcpy (pop_error,
|
|
|
481 "Badly formatted response from server in pop_list");
|
|
|
482 pop_trash (server);
|
|
|
483 free ((char *) *IDs);
|
|
|
484 free ((char *) *sizes);
|
|
|
485 return (-1);
|
|
|
486 }
|
|
|
487 (*sizes)[0] = atoi (fromserver);
|
|
|
488 (*IDs)[1] = (*sizes)[1] = 0;
|
|
|
489 return (0);
|
|
|
490 }
|
|
|
491 else
|
|
|
492 {
|
|
|
493 if (pop_multi_first (server, "LIST", &fromserver))
|
|
|
494 {
|
|
|
495 free ((char *) *IDs);
|
|
|
496 free ((char *) *sizes);
|
|
|
497 return (-1);
|
|
|
498 }
|
|
|
499 for (i = 0; i < how_many; i++)
|
|
|
500 {
|
|
3650
|
501 if (pop_multi_next (server, &fromserver) <= 0)
|
|
428
|
502 {
|
|
|
503 free ((char *) *IDs);
|
|
|
504 free ((char *) *sizes);
|
|
|
505 return (-1);
|
|
|
506 }
|
|
|
507 (*IDs)[i] = atoi (fromserver);
|
|
|
508 fromserver = strchr (fromserver, ' ');
|
|
|
509 if (! fromserver)
|
|
|
510 {
|
|
|
511 strcpy (pop_error,
|
|
|
512 "Badly formatted response from server in pop_list");
|
|
|
513 free ((char *) *IDs);
|
|
|
514 free ((char *) *sizes);
|
|
|
515 pop_trash (server);
|
|
|
516 return (-1);
|
|
|
517 }
|
|
|
518 (*sizes)[i] = atoi (fromserver);
|
|
|
519 }
|
|
3650
|
520 if (pop_multi_next (server, &fromserver) < 0)
|
|
428
|
521 {
|
|
|
522 free ((char *) *IDs);
|
|
|
523 free ((char *) *sizes);
|
|
|
524 return (-1);
|
|
|
525 }
|
|
|
526 else if (fromserver)
|
|
|
527 {
|
|
|
528 strcpy (pop_error,
|
|
|
529 "Too many response lines from server in pop_list");
|
|
|
530 free ((char *) *IDs);
|
|
|
531 free ((char *) *sizes);
|
|
|
532 return (-1);
|
|
|
533 }
|
|
|
534 (*IDs)[i] = (*sizes)[i] = 0;
|
|
|
535 return (0);
|
|
|
536 }
|
|
|
537 }
|
|
|
538
|
|
|
539 /*
|
|
|
540 * Function: pop_retrieve
|
|
|
541 *
|
|
|
542 * Purpose: Retrieve a specified message from the maildrop.
|
|
|
543 *
|
|
|
544 * Arguments:
|
|
|
545 * server The server to retrieve from.
|
|
|
546 * message The message number to retrieve.
|
|
|
547 * markfrom
|
|
|
548 * If true, then mark the string "From " at the beginning
|
|
|
549 * of lines with '>'.
|
|
3650
|
550 * msg_buf Output parameter to which a buffer containing the
|
|
|
551 * message is assigned.
|
|
428
|
552 *
|
|
3650
|
553 * Return value: The number of bytes in msg_buf, which may contain
|
|
|
554 * embedded nulls, not including its final null, or -1 on error
|
|
|
555 * with pop_error set.
|
|
428
|
556 *
|
|
|
557 * Side effects: May kill connection on error.
|
|
|
558 */
|
|
3650
|
559 int
|
|
|
560 pop_retrieve (popserver server, int message, int markfrom, char **msg_buf)
|
|
428
|
561 {
|
|
|
562 int *IDs, *sizes, bufsize, fromcount = 0, cp = 0;
|
|
|
563 char *ptr, *fromserver;
|
|
|
564 int ret;
|
|
|
565
|
|
|
566 if (server->in_multi)
|
|
|
567 {
|
|
|
568 strcpy (pop_error, "In multi-line query in pop_retrieve");
|
|
|
569 return (0);
|
|
|
570 }
|
|
|
571
|
|
|
572 if (pop_list (server, message, &IDs, &sizes))
|
|
3650
|
573 return (-1);
|
|
428
|
574
|
|
|
575 if (pop_retrieve_first (server, message, &fromserver))
|
|
|
576 {
|
|
3650
|
577 return (-1);
|
|
428
|
578 }
|
|
|
579
|
|
|
580 /*
|
|
|
581 * The "5" below is an arbitrary constant -- I assume that if
|
|
|
582 * there are "From" lines in the text to be marked, there
|
|
|
583 * probably won't be more than 5 of them. If there are, I
|
|
|
584 * allocate more space for them below.
|
|
|
585 */
|
|
|
586 bufsize = sizes[0] + (markfrom ? 5 : 0);
|
|
|
587 ptr = (char *)malloc (bufsize);
|
|
|
588 free ((char *) IDs);
|
|
|
589 free ((char *) sizes);
|
|
|
590
|
|
|
591 if (! ptr)
|
|
|
592 {
|
|
|
593 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
594 pop_retrieve_flush (server);
|
|
3650
|
595 return (-1);
|
|
428
|
596 }
|
|
|
597
|
|
3650
|
598 while ((ret = pop_retrieve_next (server, &fromserver)) >= 0)
|
|
428
|
599 {
|
|
|
600 if (! fromserver)
|
|
|
601 {
|
|
|
602 ptr[cp] = '\0';
|
|
3650
|
603 *msg_buf = ptr;
|
|
|
604 return (cp);
|
|
428
|
605 }
|
|
|
606 if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' &&
|
|
|
607 fromserver[2] == 'o' && fromserver[3] == 'm' &&
|
|
|
608 fromserver[4] == ' ')
|
|
|
609 {
|
|
|
610 if (++fromcount == 5)
|
|
|
611 {
|
|
|
612 bufsize += 5;
|
|
|
613 ptr = (char *)realloc (ptr, bufsize);
|
|
|
614 if (! ptr)
|
|
|
615 {
|
|
|
616 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
617 pop_retrieve_flush (server);
|
|
3650
|
618 return (-1);
|
|
428
|
619 }
|
|
|
620 fromcount = 0;
|
|
|
621 }
|
|
|
622 ptr[cp++] = '>';
|
|
|
623 }
|
|
3650
|
624 memcpy (&ptr[cp], fromserver, ret);
|
|
|
625 cp += ret;
|
|
428
|
626 ptr[cp++] = '\n';
|
|
|
627 }
|
|
|
628
|
|
3650
|
629 free (ptr);
|
|
|
630 return (-1);
|
|
428
|
631 }
|
|
|
632
|
|
|
633 int
|
|
|
634 pop_retrieve_first (popserver server, int message, char **response)
|
|
|
635 {
|
|
|
636 sprintf (pop_error, "RETR %d", message);
|
|
|
637 return (pop_multi_first (server, pop_error, response));
|
|
|
638 }
|
|
|
639
|
|
3650
|
640 /*
|
|
|
641 Returns a negative number on error, 0 to indicate that the data has
|
|
|
642 all been read (i.e., the server has returned a "." termination
|
|
|
643 line), or a positive number indicating the number of bytes in the
|
|
|
644 returned buffer (which is null-terminated and may contain embedded
|
|
|
645 nulls, but the returned bytecount doesn't include the final null).
|
|
|
646 */
|
|
|
647
|
|
428
|
648 int
|
|
|
649 pop_retrieve_next (popserver server, char **line)
|
|
|
650 {
|
|
|
651 return (pop_multi_next (server, line));
|
|
|
652 }
|
|
|
653
|
|
|
654 int
|
|
|
655 pop_retrieve_flush (popserver server)
|
|
|
656 {
|
|
|
657 return (pop_multi_flush (server));
|
|
|
658 }
|
|
|
659
|
|
|
660 int
|
|
|
661 pop_top_first (popserver server, int message, int lines, char **response)
|
|
|
662 {
|
|
|
663 sprintf (pop_error, "TOP %d %d", message, lines);
|
|
|
664 return (pop_multi_first (server, pop_error, response));
|
|
|
665 }
|
|
|
666
|
|
3650
|
667 /*
|
|
|
668 Returns a negative number on error, 0 to indicate that the data has
|
|
|
669 all been read (i.e., the server has returned a "." termination
|
|
|
670 line), or a positive number indicating the number of bytes in the
|
|
|
671 returned buffer (which is null-terminated and may contain embedded
|
|
|
672 nulls, but the returned bytecount doesn't include the final null).
|
|
|
673 */
|
|
|
674
|
|
428
|
675 int
|
|
|
676 pop_top_next (popserver server, char **line)
|
|
|
677 {
|
|
|
678 return (pop_multi_next (server, line));
|
|
|
679 }
|
|
|
680
|
|
|
681 int
|
|
|
682 pop_top_flush (popserver server)
|
|
|
683 {
|
|
|
684 return (pop_multi_flush (server));
|
|
|
685 }
|
|
|
686
|
|
|
687 int
|
|
|
688 pop_multi_first (popserver server, char *command, char **response)
|
|
|
689 {
|
|
|
690 if (server->in_multi)
|
|
|
691 {
|
|
|
692 strcpy (pop_error,
|
|
|
693 "Already in multi-line query in pop_multi_first");
|
|
|
694 return (-1);
|
|
|
695 }
|
|
|
696
|
|
3650
|
697 if (sendline (server, command) || (pop_getline (server, response) < 0))
|
|
428
|
698 {
|
|
|
699 return (-1);
|
|
|
700 }
|
|
|
701
|
|
|
702 if (0 == strncmp (*response, "-ERR", 4))
|
|
|
703 {
|
|
|
704 strncpy (pop_error, *response, ERROR_MAX);
|
|
|
705 return (-1);
|
|
|
706 }
|
|
|
707 else if (0 == strncmp (*response, "+OK", 3))
|
|
|
708 {
|
|
|
709 for (*response += 3; **response == ' '; (*response)++) /* empty */;
|
|
|
710 server->in_multi = 1;
|
|
|
711 return (0);
|
|
|
712 }
|
|
|
713 else
|
|
|
714 {
|
|
|
715 strcpy (pop_error,
|
|
|
716 "Unexpected response from server in pop_multi_first");
|
|
|
717 return (-1);
|
|
|
718 }
|
|
|
719 }
|
|
|
720
|
|
3650
|
721 /*
|
|
|
722 Read the next line of data from SERVER and place a pointer to it
|
|
|
723 into LINE. Return -1 on error, 0 if there are no more lines to read
|
|
|
724 (i.e., the server has returned a line containing only "."), or a
|
|
|
725 positive number indicating the number of bytes in the LINE buffer
|
|
|
726 (not including the final null). The data in that buffer may contain
|
|
|
727 embedded nulls, but does not contain the final CRLF. When returning
|
|
|
728 0, LINE is set to null. */
|
|
|
729
|
|
428
|
730 int
|
|
|
731 pop_multi_next (popserver server, char **line)
|
|
|
732 {
|
|
|
733 char *fromserver;
|
|
3650
|
734 int ret;
|
|
428
|
735
|
|
|
736 if (! server->in_multi)
|
|
|
737 {
|
|
|
738 strcpy (pop_error, "Not in multi-line query in pop_multi_next");
|
|
|
739 return (-1);
|
|
|
740 }
|
|
|
741
|
|
3650
|
742 if ((ret = pop_getline (server, &fromserver)) < 0)
|
|
428
|
743 {
|
|
|
744 return (-1);
|
|
|
745 }
|
|
|
746
|
|
|
747 if (fromserver[0] == '.')
|
|
|
748 {
|
|
|
749 if (! fromserver[1])
|
|
|
750 {
|
|
|
751 *line = 0;
|
|
|
752 server->in_multi = 0;
|
|
|
753 return (0);
|
|
|
754 }
|
|
|
755 else
|
|
|
756 {
|
|
|
757 *line = fromserver + 1;
|
|
3650
|
758 return (ret - 1);
|
|
428
|
759 }
|
|
|
760 }
|
|
|
761 else
|
|
|
762 {
|
|
|
763 *line = fromserver;
|
|
3650
|
764 return (ret);
|
|
428
|
765 }
|
|
|
766 }
|
|
|
767
|
|
|
768 int
|
|
|
769 pop_multi_flush (popserver server)
|
|
|
770 {
|
|
|
771 char *line;
|
|
3650
|
772 int ret;
|
|
428
|
773
|
|
|
774 if (! server->in_multi)
|
|
|
775 {
|
|
|
776 return (0);
|
|
|
777 }
|
|
|
778
|
|
3650
|
779 while ((ret = pop_multi_next (server, &line)))
|
|
428
|
780 {
|
|
3650
|
781 if (ret < 0)
|
|
428
|
782 {
|
|
3650
|
783 return (-1);
|
|
428
|
784 }
|
|
|
785 }
|
|
|
786
|
|
3650
|
787 return (0);
|
|
428
|
788 }
|
|
|
789
|
|
|
790 /* Function: pop_delete
|
|
|
791 *
|
|
|
792 * Purpose: Delete a specified message.
|
|
|
793 *
|
|
|
794 * Arguments:
|
|
|
795 * server Server from which to delete the message.
|
|
|
796 * message Message to delete.
|
|
|
797 *
|
|
|
798 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
799 * otherwise.
|
|
|
800 */
|
|
|
801 int
|
|
|
802 pop_delete (popserver server, int message)
|
|
|
803 {
|
|
|
804 if (server->in_multi)
|
|
|
805 {
|
|
|
806 strcpy (pop_error, "In multi-line query in pop_delete");
|
|
|
807 return (-1);
|
|
|
808 }
|
|
|
809
|
|
|
810 sprintf (pop_error, "DELE %d", message);
|
|
|
811
|
|
|
812 if (sendline (server, pop_error) || getok (server))
|
|
|
813 return (-1);
|
|
|
814
|
|
|
815 return (0);
|
|
|
816 }
|
|
|
817
|
|
|
818 /*
|
|
|
819 * Function: pop_noop
|
|
|
820 *
|
|
|
821 * Purpose: Send a noop command to the server.
|
|
|
822 *
|
|
|
823 * Argument:
|
|
|
824 * server The server to send to.
|
|
|
825 *
|
|
|
826 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
827 * otherwise.
|
|
|
828 *
|
|
|
829 * Side effects: Closes connection on error.
|
|
|
830 */
|
|
|
831 int
|
|
|
832 pop_noop (popserver server)
|
|
|
833 {
|
|
|
834 if (server->in_multi)
|
|
|
835 {
|
|
|
836 strcpy (pop_error, "In multi-line query in pop_noop");
|
|
|
837 return (-1);
|
|
|
838 }
|
|
|
839
|
|
|
840 if (sendline (server, "NOOP") || getok (server))
|
|
|
841 return (-1);
|
|
|
842
|
|
|
843 return (0);
|
|
|
844 }
|
|
|
845
|
|
|
846 /*
|
|
|
847 * Function: pop_last
|
|
|
848 *
|
|
|
849 * Purpose: Find out the highest seen message from the server.
|
|
|
850 *
|
|
|
851 * Arguments:
|
|
|
852 * server The server.
|
|
|
853 *
|
|
|
854 * Return value: If successful, the highest seen message, which is
|
|
|
855 * greater than or equal to 0. Otherwise, a negative number with
|
|
|
856 * the error explained in pop_error.
|
|
|
857 *
|
|
|
858 * Side effects: Closes the connection on error.
|
|
|
859 */
|
|
|
860 int
|
|
|
861 pop_last (popserver server)
|
|
|
862 {
|
|
|
863 char *fromserver;
|
|
|
864
|
|
|
865 if (server->in_multi)
|
|
|
866 {
|
|
|
867 strcpy (pop_error, "In multi-line query in pop_last");
|
|
|
868 return (-1);
|
|
|
869 }
|
|
|
870
|
|
|
871 if (sendline (server, "LAST"))
|
|
|
872 return (-1);
|
|
|
873
|
|
3650
|
874 if (pop_getline (server, &fromserver) < 0)
|
|
428
|
875 return (-1);
|
|
|
876
|
|
|
877 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
878 {
|
|
|
879 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
880 return (-1);
|
|
|
881 }
|
|
|
882 else if (strncmp (fromserver, "+OK ", 4))
|
|
|
883 {
|
|
|
884 strcpy (pop_error, "Unexpected response from server in pop_last");
|
|
|
885 pop_trash (server);
|
|
|
886 return (-1);
|
|
|
887 }
|
|
|
888 else
|
|
|
889 {
|
|
|
890 return (atoi (&fromserver[4]));
|
|
|
891 }
|
|
|
892 }
|
|
|
893
|
|
|
894 /*
|
|
|
895 * Function: pop_reset
|
|
|
896 *
|
|
|
897 * Purpose: Reset the server to its initial connect state
|
|
|
898 *
|
|
|
899 * Arguments:
|
|
|
900 * server The server.
|
|
|
901 *
|
|
|
902 * Return value: 0 for success, non-0 with error in pop_error
|
|
|
903 * otherwise.
|
|
|
904 *
|
|
|
905 * Side effects: Closes the connection on error.
|
|
|
906 */
|
|
|
907 int
|
|
|
908 pop_reset (popserver server)
|
|
|
909 {
|
|
|
910 if (pop_retrieve_flush (server))
|
|
|
911 {
|
|
|
912 return (-1);
|
|
|
913 }
|
|
|
914
|
|
|
915 if (sendline (server, "RSET") || getok (server))
|
|
|
916 return (-1);
|
|
|
917
|
|
|
918 return (0);
|
|
|
919 }
|
|
|
920
|
|
|
921 /*
|
|
|
922 * Function: pop_quit
|
|
|
923 *
|
|
|
924 * Purpose: Quit the connection to the server,
|
|
|
925 *
|
|
|
926 * Arguments:
|
|
|
927 * server The server to quit.
|
|
|
928 *
|
|
|
929 * Return value: 0 for success, non-zero otherwise with error in
|
|
|
930 * pop_error.
|
|
|
931 *
|
|
|
932 * Side Effects: The popserver passed in is unusable after this
|
|
|
933 * function is called, even if an error occurs.
|
|
|
934 */
|
|
|
935 int
|
|
|
936 pop_quit (popserver server)
|
|
|
937 {
|
|
|
938 int ret = 0;
|
|
|
939
|
|
|
940 if (server->file >= 0)
|
|
|
941 {
|
|
|
942 if (pop_retrieve_flush (server))
|
|
|
943 {
|
|
|
944 ret = -1;
|
|
|
945 }
|
|
|
946
|
|
|
947 if (sendline (server, "QUIT") || getok (server))
|
|
|
948 {
|
|
|
949 ret = -1;
|
|
|
950 }
|
|
|
951
|
|
|
952 CLOSESOCKET (server->file);
|
|
|
953 }
|
|
|
954
|
|
|
955 if (server->buffer)
|
|
|
956 free (server->buffer);
|
|
|
957 free ((char *) server);
|
|
|
958
|
|
|
959 return (ret);
|
|
|
960 }
|
|
|
961
|
|
442
|
962 #ifdef WIN32_NATIVE
|
|
428
|
963 static int have_winsock = 0;
|
|
|
964 #endif
|
|
|
965
|
|
|
966 /*
|
|
|
967 * Function: socket_connection
|
|
|
968 *
|
|
|
969 * Purpose: Opens the network connection with the mail host, without
|
|
|
970 * doing any sort of I/O with it or anything.
|
|
|
971 *
|
|
|
972 * Arguments:
|
|
|
973 * host The host to which to connect.
|
|
|
974 * flags Option flags.
|
|
|
975 *
|
|
|
976 * Return value: A file descriptor indicating the connection, or -1
|
|
|
977 * indicating failure, in which case an error has been copied
|
|
|
978 * into pop_error.
|
|
|
979 */
|
|
|
980 static int
|
|
2286
|
981 socket_connection (char *host,
|
|
|
982 #if defined (KERBEROS) || defined (HESIOD)
|
|
|
983 int flags
|
|
|
984 #else
|
|
|
985 int UNUSED (flags)
|
|
|
986 #endif
|
|
|
987 )
|
|
428
|
988 {
|
|
|
989 struct hostent *hostent;
|
|
|
990 struct servent *servent;
|
|
|
991 struct sockaddr_in addr;
|
|
|
992 char found_port = 0;
|
|
|
993 char *service;
|
|
|
994 int sock;
|
|
|
995 #ifdef KERBEROS
|
|
|
996 #ifdef KRB5
|
|
|
997 krb5_error_code rem;
|
|
3650
|
998 krb5_context kcontext = 0;
|
|
|
999 krb5_auth_context auth_context = 0;
|
|
428
|
1000 krb5_ccache ccdef;
|
|
|
1001 krb5_principal client, server;
|
|
|
1002 krb5_error *err_ret;
|
|
|
1003 register char *cp;
|
|
|
1004 #else
|
|
|
1005 KTEXT ticket;
|
|
|
1006 MSG_DAT msg_data;
|
|
|
1007 CREDENTIALS cred;
|
|
|
1008 Key_schedule schedule;
|
|
|
1009 int rem;
|
|
3650
|
1010 char *realhost;
|
|
428
|
1011 #endif /* KRB5 */
|
|
|
1012 #endif /* KERBEROS */
|
|
|
1013
|
|
|
1014 int try_count = 0;
|
|
|
1015
|
|
442
|
1016 #ifdef WIN32_NATIVE
|
|
428
|
1017 {
|
|
|
1018 WSADATA winsockData;
|
|
|
1019 if (WSAStartup (0x101, &winsockData) == 0)
|
|
|
1020 have_winsock = 1;
|
|
|
1021 }
|
|
|
1022 #endif
|
|
|
1023
|
|
|
1024 memset (&addr, 0, sizeof (addr));
|
|
|
1025 addr.sin_family = AF_INET;
|
|
|
1026
|
|
|
1027 #ifdef KERBEROS
|
|
|
1028 service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE;
|
|
|
1029 #else
|
|
|
1030 service = POP_SERVICE;
|
|
|
1031 #endif
|
|
|
1032
|
|
|
1033 #ifdef HESIOD
|
|
|
1034 if (! (flags & POP_NO_HESIOD))
|
|
|
1035 {
|
|
|
1036 servent = hes_getservbyname (service, "tcp");
|
|
|
1037 if (servent)
|
|
|
1038 {
|
|
|
1039 addr.sin_port = servent->s_port;
|
|
|
1040 found_port = 1;
|
|
|
1041 }
|
|
|
1042 }
|
|
|
1043 #endif
|
|
|
1044 if (! found_port)
|
|
|
1045 {
|
|
|
1046 servent = getservbyname (service, "tcp");
|
|
|
1047 if (servent)
|
|
|
1048 {
|
|
|
1049 addr.sin_port = servent->s_port;
|
|
|
1050 }
|
|
|
1051 else
|
|
|
1052 {
|
|
|
1053 #ifdef KERBEROS
|
|
|
1054 addr.sin_port = htons ((flags & POP_NO_KERBEROS) ?
|
|
|
1055 POP_PORT : KPOP_PORT);
|
|
|
1056 #else
|
|
|
1057 addr.sin_port = htons (POP_PORT);
|
|
|
1058 #endif
|
|
|
1059 }
|
|
|
1060 }
|
|
|
1061
|
|
3650
|
1062 #define POP_SOCKET_ERROR "Could not create socket for POP connection: "
|
|
428
|
1063
|
|
|
1064 sock = socket (PF_INET, SOCK_STREAM, 0);
|
|
|
1065 if (sock < 0)
|
|
|
1066 {
|
|
3650
|
1067 strcpy (pop_error, POP_SOCKET_ERROR);
|
|
428
|
1068 strncat (pop_error, strerror (errno),
|
|
3650
|
1069 ERROR_MAX - sizeof (POP_SOCKET_ERROR));
|
|
428
|
1070 return (-1);
|
|
|
1071
|
|
|
1072 }
|
|
|
1073
|
|
3650
|
1074 do
|
|
|
1075 {
|
|
|
1076 hostent = gethostbyname (host);
|
|
|
1077 try_count++;
|
|
|
1078 if ((! hostent) && ((h_errno != TRY_AGAIN) || (try_count == 5)))
|
|
|
1079 {
|
|
|
1080 strcpy (pop_error, "Could not determine POP server's address");
|
|
|
1081 return (-1);
|
|
|
1082 }
|
|
|
1083 } while (! hostent);
|
|
|
1084
|
|
428
|
1085 while (*hostent->h_addr_list)
|
|
|
1086 {
|
|
|
1087 memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length);
|
|
|
1088 if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr)))
|
|
|
1089 break;
|
|
|
1090 hostent->h_addr_list++;
|
|
|
1091 }
|
|
|
1092
|
|
|
1093 #define CONNECT_ERROR "Could not connect to POP server: "
|
|
|
1094
|
|
|
1095 if (! *hostent->h_addr_list)
|
|
|
1096 {
|
|
|
1097 CLOSESOCKET (sock);
|
|
|
1098 strcpy (pop_error, CONNECT_ERROR);
|
|
|
1099 strncat (pop_error, strerror (errno),
|
|
|
1100 ERROR_MAX - sizeof (CONNECT_ERROR));
|
|
|
1101 return (-1);
|
|
|
1102
|
|
|
1103 }
|
|
|
1104
|
|
|
1105 #ifdef KERBEROS
|
|
|
1106 #define KRB_ERROR "Kerberos error connecting to POP server: "
|
|
|
1107 if (! (flags & POP_NO_KERBEROS))
|
|
|
1108 {
|
|
|
1109 #ifdef KRB5
|
|
3650
|
1110 if ((rem = krb5_init_context (&kcontext)))
|
|
428
|
1111 {
|
|
|
1112 krb5error:
|
|
3650
|
1113 if (auth_context)
|
|
|
1114 krb5_auth_con_free (kcontext, auth_context);
|
|
|
1115 if (kcontext)
|
|
|
1116 krb5_free_context (kcontext);
|
|
428
|
1117 strcpy (pop_error, KRB_ERROR);
|
|
|
1118 strncat (pop_error, error_message (rem),
|
|
|
1119 ERROR_MAX - sizeof(KRB_ERROR));
|
|
|
1120 CLOSESOCKET (sock);
|
|
|
1121 return (-1);
|
|
|
1122 }
|
|
|
1123
|
|
3650
|
1124 if ((rem = krb5_auth_con_init (kcontext, &auth_context)))
|
|
|
1125 goto krb5error;
|
|
|
1126
|
|
|
1127 if (rem = krb5_cc_default (kcontext, &ccdef))
|
|
|
1128 goto krb5error;
|
|
|
1129
|
|
|
1130 if (rem = krb5_cc_get_principal (kcontext, ccdef, &client))
|
|
|
1131 goto krb5error;
|
|
428
|
1132
|
|
|
1133 for (cp = hostent->h_name; *cp; cp++)
|
|
|
1134 {
|
|
|
1135 if (isupper (*cp))
|
|
|
1136 {
|
|
|
1137 *cp = tolower (*cp);
|
|
|
1138 }
|
|
|
1139 }
|
|
|
1140
|
|
3650
|
1141 if (rem = krb5_sname_to_principal (kcontext, hostent->h_name,
|
|
|
1142 POP_SERVICE, FALSE, &server))
|
|
|
1143 goto krb5error;
|
|
428
|
1144
|
|
3650
|
1145 rem = krb5_sendauth (kcontext, &auth_context,
|
|
|
1146 (krb5_pointer) &sock, "KPOPV1.0", client, server,
|
|
428
|
1147 AP_OPTS_MUTUAL_REQUIRED,
|
|
|
1148 0, /* no checksum */
|
|
|
1149 0, /* no creds, use ccache instead */
|
|
|
1150 ccdef,
|
|
3650
|
1151 &err_ret,
|
|
428
|
1152 0, /* don't need subsession key */
|
|
|
1153 0); /* don't need reply */
|
|
3650
|
1154 krb5_free_principal (kcontext, server);
|
|
428
|
1155 if (rem)
|
|
|
1156 {
|
|
|
1157 if (err_ret && err_ret->text.length)
|
|
|
1158 {
|
|
|
1159 strcpy (pop_error, KRB_ERROR);
|
|
|
1160 strncat (pop_error, error_message (rem),
|
|
|
1161 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1162 strncat (pop_error, " [server says '",
|
|
|
1163 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1164 strncat (pop_error, err_ret->text.data,
|
|
|
1165 min (ERROR_MAX - strlen (pop_error) - 1,
|
|
|
1166 err_ret->text.length));
|
|
|
1167 strncat (pop_error, "']",
|
|
|
1168 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1169 }
|
|
|
1170 else
|
|
|
1171 {
|
|
|
1172 strcpy (pop_error, KRB_ERROR);
|
|
|
1173 strncat (pop_error, error_message (rem),
|
|
|
1174 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1175 }
|
|
|
1176 if (err_ret)
|
|
3650
|
1177 krb5_free_error (kcontext, err_ret);
|
|
|
1178 krb5_auth_con_free (kcontext, auth_context);
|
|
|
1179 krb5_free_context (kcontext);
|
|
428
|
1180
|
|
|
1181 CLOSESOCKET (sock);
|
|
|
1182 return (-1);
|
|
|
1183 }
|
|
|
1184 #else /* ! KRB5 */
|
|
|
1185 ticket = (KTEXT) malloc (sizeof (KTEXT_ST));
|
|
3650
|
1186 rem = krb_sendauth (0L, sock, ticket, "pop", realhost,
|
|
|
1187 (char *) krb_realmofhost (realhost),
|
|
428
|
1188 (unsigned long) 0, &msg_data, &cred, schedule,
|
|
|
1189 (struct sockaddr_in *) 0,
|
|
|
1190 (struct sockaddr_in *) 0,
|
|
|
1191 "KPOPV0.1");
|
|
|
1192 free ((char *) ticket);
|
|
3650
|
1193 free (realhost);
|
|
428
|
1194 if (rem != KSUCCESS)
|
|
|
1195 {
|
|
|
1196 strcpy (pop_error, KRB_ERROR);
|
|
|
1197 strncat (pop_error, krb_err_txt[rem],
|
|
|
1198 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1199 CLOSESOCKET (sock);
|
|
|
1200 return (-1);
|
|
|
1201 }
|
|
|
1202 #endif /* KRB5 */
|
|
|
1203 }
|
|
|
1204 #endif /* KERBEROS */
|
|
|
1205
|
|
|
1206 return (sock);
|
|
|
1207 } /* socket_connection */
|
|
|
1208
|
|
|
1209 /*
|
|
|
1210 * Function: pop_getline
|
|
|
1211 *
|
|
|
1212 * Purpose: Get a line of text from the connection and return a
|
|
|
1213 * pointer to it. The carriage return and linefeed at the end of
|
|
|
1214 * the line are stripped, but periods at the beginnings of lines
|
|
|
1215 * are NOT dealt with in any special way.
|
|
|
1216 *
|
|
|
1217 * Arguments:
|
|
|
1218 * server The server from which to get the line of text.
|
|
|
1219 *
|
|
3650
|
1220 * Returns: The number of characters in the line, which is returned in
|
|
|
1221 * LINE, not including the final null. A return value of 0
|
|
|
1222 * indicates a blank line. A negative return value indicates an
|
|
|
1223 * error (in which case the contents of LINE are undefined. In
|
|
|
1224 * case of error, an error message is copied into pop_error.
|
|
428
|
1225 *
|
|
|
1226 * Notes: The line returned is overwritten with each call to pop_getline.
|
|
|
1227 *
|
|
|
1228 * Side effects: Closes the connection on error.
|
|
3650
|
1229 *
|
|
|
1230 * THE RETURNED LINE MAY CONTAIN EMBEDDED NULLS!
|
|
428
|
1231 */
|
|
3650
|
1232 static int
|
|
|
1233 pop_getline (popserver server, char **line)
|
|
428
|
1234 {
|
|
|
1235 #define GETLINE_ERROR "Error reading from server: "
|
|
|
1236
|
|
|
1237 int ret;
|
|
|
1238 int search_offset = 0;
|
|
|
1239
|
|
|
1240 if (server->data)
|
|
|
1241 {
|
|
3650
|
1242 char *cp = find_crlf (server->buffer + server->buffer_index,
|
|
|
1243 server->data);
|
|
428
|
1244 if (cp)
|
|
|
1245 {
|
|
|
1246 int found;
|
|
|
1247 int data_used;
|
|
|
1248
|
|
|
1249 found = server->buffer_index;
|
|
|
1250 data_used = (cp + 2) - server->buffer - found;
|
|
|
1251
|
|
|
1252 *cp = '\0'; /* terminate the string to be returned */
|
|
|
1253 server->data -= data_used;
|
|
|
1254 server->buffer_index += data_used;
|
|
|
1255
|
|
|
1256 if (pop_debug)
|
|
3650
|
1257 /* Embedded nulls will truncate this output prematurely,
|
|
|
1258 but that's OK because it's just for debugging anyway. */
|
|
428
|
1259 fprintf (stderr, "<<< %s\n", server->buffer + found);
|
|
3650
|
1260 *line = server->buffer + found;
|
|
|
1261 return (data_used - 2);
|
|
428
|
1262 }
|
|
|
1263 else
|
|
|
1264 {
|
|
|
1265 memcpy (server->buffer,
|
|
|
1266 server->buffer + server->buffer_index,
|
|
|
1267 server->data);
|
|
|
1268 /* Record the fact that we've searched the data already in
|
|
|
1269 the buffer for a CRLF, so that when we search below, we
|
|
|
1270 don't have to search the same data twice. There's a "-
|
|
|
1271 1" here to account for the fact that the last character
|
|
|
1272 of the data we have may be the CR of a CRLF pair, of
|
|
|
1273 which we haven't read the second half yet, so we may have
|
|
|
1274 to search it again when we read more data. */
|
|
|
1275 search_offset = server->data - 1;
|
|
|
1276 server->buffer_index = 0;
|
|
|
1277 }
|
|
|
1278 }
|
|
|
1279 else
|
|
|
1280 {
|
|
|
1281 server->buffer_index = 0;
|
|
|
1282 }
|
|
|
1283
|
|
|
1284 while (1)
|
|
|
1285 {
|
|
|
1286 /* There's a "- 1" here to leave room for the null that we put
|
|
|
1287 at the end of the read data below. We put the null there so
|
|
|
1288 that find_crlf knows where to stop when we call it. */
|
|
|
1289 if (server->data == server->buffer_size - 1)
|
|
|
1290 {
|
|
|
1291 server->buffer_size += GETLINE_INCR;
|
|
|
1292 server->buffer = (char *)realloc (server->buffer, server->buffer_size);
|
|
|
1293 if (! server->buffer)
|
|
|
1294 {
|
|
|
1295 strcpy (pop_error, "Out of memory in pop_getline");
|
|
|
1296 pop_trash (server);
|
|
3650
|
1297 return (-1);
|
|
428
|
1298 }
|
|
|
1299 }
|
|
|
1300 ret = RECV (server->file, server->buffer + server->data,
|
|
|
1301 server->buffer_size - server->data - 1, 0);
|
|
|
1302 if (ret < 0)
|
|
|
1303 {
|
|
|
1304 strcpy (pop_error, GETLINE_ERROR);
|
|
|
1305 strncat (pop_error, strerror (errno),
|
|
|
1306 ERROR_MAX - sizeof (GETLINE_ERROR));
|
|
|
1307 pop_trash (server);
|
|
3650
|
1308 return (-1);
|
|
428
|
1309 }
|
|
|
1310 else if (ret == 0)
|
|
|
1311 {
|
|
|
1312 strcpy (pop_error, "Unexpected EOF from server in pop_getline");
|
|
|
1313 pop_trash (server);
|
|
3650
|
1314 return (-1);
|
|
428
|
1315 }
|
|
|
1316 else
|
|
|
1317 {
|
|
|
1318 char *cp;
|
|
|
1319 server->data += ret;
|
|
|
1320 server->buffer[server->data] = '\0';
|
|
|
1321
|
|
3650
|
1322 cp = find_crlf (server->buffer + search_offset,
|
|
|
1323 server->data - search_offset);
|
|
428
|
1324 if (cp)
|
|
|
1325 {
|
|
|
1326 int data_used = (cp + 2) - server->buffer;
|
|
|
1327 *cp = '\0';
|
|
|
1328 server->data -= data_used;
|
|
|
1329 server->buffer_index = data_used;
|
|
|
1330
|
|
|
1331 if (pop_debug)
|
|
|
1332 fprintf (stderr, "<<< %s\n", server->buffer);
|
|
3650
|
1333 *line = server->buffer;
|
|
|
1334 return (data_used - 2);
|
|
428
|
1335 }
|
|
3650
|
1336 /* As above, the "- 1" here is to account for the fact that
|
|
|
1337 we may have read a CR without its accompanying LF. */
|
|
|
1338 search_offset += ret - 1;
|
|
428
|
1339 }
|
|
|
1340 }
|
|
|
1341
|
|
|
1342 /* NOTREACHED */
|
|
|
1343 }
|
|
|
1344
|
|
|
1345 /*
|
|
|
1346 * Function: sendline
|
|
|
1347 *
|
|
|
1348 * Purpose: Sends a line of text to the POP server. The line of text
|
|
|
1349 * passed into this function should NOT have the carriage return
|
|
|
1350 * and linefeed on the end of it. Periods at beginnings of lines
|
|
|
1351 * will NOT be treated specially by this function.
|
|
|
1352 *
|
|
|
1353 * Arguments:
|
|
|
1354 * server The server to which to send the text.
|
|
|
1355 * line The line of text to send.
|
|
|
1356 *
|
|
|
1357 * Return value: Upon successful completion, a value of 0 will be
|
|
|
1358 * returned. Otherwise, a non-zero value will be returned, and
|
|
|
1359 * an error will be copied into pop_error.
|
|
|
1360 *
|
|
|
1361 * Side effects: Closes the connection on error.
|
|
|
1362 */
|
|
|
1363 static int
|
|
|
1364 sendline (popserver server, char *line)
|
|
|
1365 {
|
|
|
1366 #define SENDLINE_ERROR "Error writing to POP server: "
|
|
|
1367 int ret;
|
|
3650
|
1368 char *buf;
|
|
428
|
1369
|
|
3650
|
1370 /* Combine the string and the CR-LF into one buffer. Otherwise, two
|
|
|
1371 reasonable network stack optimizations, Nagle's algorithm and
|
|
|
1372 delayed acks, combine to delay us a fraction of a second on every
|
|
|
1373 message we send. (Movemail writes line without \r\n, client
|
|
|
1374 kernel sends packet, server kernel delays the ack to see if it
|
|
|
1375 can combine it with data, movemail writes \r\n, client kernel
|
|
|
1376 waits because it has unacked data already in its outgoing queue,
|
|
|
1377 client kernel eventually times out and sends.)
|
|
|
1378
|
|
|
1379 This can be something like 0.2s per command, which can add up
|
|
|
1380 over a few dozen messages, and is a big chunk of the time we
|
|
|
1381 spend fetching mail from a server close by. */
|
|
|
1382 buf = alloca (strlen (line) + 3);
|
|
|
1383 strcpy (buf, line);
|
|
|
1384 strcat (buf, "\r\n");
|
|
428
|
1385 ret = fullwrite (server->file, line, strlen (line));
|
|
|
1386
|
|
|
1387 if (ret < 0)
|
|
|
1388 {
|
|
|
1389 pop_trash (server);
|
|
|
1390 strcpy (pop_error, SENDLINE_ERROR);
|
|
|
1391 strncat (pop_error, strerror (errno),
|
|
|
1392 ERROR_MAX - sizeof (SENDLINE_ERROR));
|
|
|
1393 return (ret);
|
|
|
1394 }
|
|
|
1395
|
|
|
1396 if (pop_debug)
|
|
|
1397 fprintf (stderr, ">>> %s\n", line);
|
|
|
1398
|
|
|
1399 return (0);
|
|
|
1400 }
|
|
|
1401
|
|
|
1402 /*
|
|
|
1403 * Procedure: fullwrite
|
|
|
1404 *
|
|
|
1405 * Purpose: Just like write, but keeps trying until the entire string
|
|
|
1406 * has been written.
|
|
|
1407 *
|
|
|
1408 * Return value: Same as write. Pop_error is not set.
|
|
|
1409 */
|
|
|
1410 static int
|
|
|
1411 fullwrite (int fd, char *buf, int nbytes)
|
|
|
1412 {
|
|
|
1413 char *cp;
|
|
3650
|
1414 int ret = 0;
|
|
428
|
1415
|
|
|
1416 cp = buf;
|
|
3650
|
1417 while (nbytes && ((ret = SEND (fd, cp, nbytes, 0)) > 0))
|
|
428
|
1418 {
|
|
|
1419 cp += ret;
|
|
|
1420 nbytes -= ret;
|
|
|
1421 }
|
|
|
1422
|
|
|
1423 return (ret);
|
|
|
1424 }
|
|
|
1425
|
|
|
1426 /*
|
|
|
1427 * Procedure getok
|
|
|
1428 *
|
|
|
1429 * Purpose: Reads a line from the server. If the return indicator is
|
|
|
1430 * positive, return with a zero exit status. If not, return with
|
|
|
1431 * a negative exit status.
|
|
|
1432 *
|
|
|
1433 * Arguments:
|
|
|
1434 * server The server to read from.
|
|
|
1435 *
|
|
|
1436 * Returns: 0 for success, else for failure and puts error in pop_error.
|
|
|
1437 *
|
|
|
1438 * Side effects: On failure, may make the connection unusable.
|
|
|
1439 */
|
|
|
1440 static int
|
|
|
1441 getok (popserver server)
|
|
|
1442 {
|
|
|
1443 char *fromline;
|
|
|
1444
|
|
3650
|
1445 if (pop_getline (server, &fromline) < 0)
|
|
428
|
1446 {
|
|
|
1447 return (-1);
|
|
|
1448 }
|
|
|
1449
|
|
|
1450 if (! strncmp (fromline, "+OK", 3))
|
|
|
1451 return (0);
|
|
|
1452 else if (! strncmp (fromline, "-ERR", 4))
|
|
|
1453 {
|
|
|
1454 strncpy (pop_error, fromline, ERROR_MAX);
|
|
|
1455 pop_error[ERROR_MAX-1] = '\0';
|
|
|
1456 return (-1);
|
|
|
1457 }
|
|
|
1458 else
|
|
|
1459 {
|
|
|
1460 strcpy (pop_error,
|
|
|
1461 "Unexpected response from server; expecting +OK or -ERR");
|
|
|
1462 pop_trash (server);
|
|
|
1463 return (-1);
|
|
|
1464 }
|
|
|
1465 }
|
|
|
1466
|
|
|
1467 #if 0
|
|
|
1468 /*
|
|
|
1469 * Function: gettermination
|
|
|
1470 *
|
|
|
1471 * Purpose: Gets the next line and verifies that it is a termination
|
|
|
1472 * line (nothing but a dot).
|
|
|
1473 *
|
|
|
1474 * Return value: 0 on success, non-zero with pop_error set on error.
|
|
|
1475 *
|
|
|
1476 * Side effects: Closes the connection on error.
|
|
|
1477 */
|
|
|
1478 static int
|
|
|
1479 gettermination (popserver server)
|
|
|
1480 {
|
|
|
1481 char *fromserver;
|
|
|
1482
|
|
3650
|
1483 if (pop_getline (server, &fromserver) < 0)
|
|
428
|
1484 return (-1);
|
|
|
1485
|
|
|
1486 if (strcmp (fromserver, "."))
|
|
|
1487 {
|
|
|
1488 strcpy (pop_error,
|
|
|
1489 "Unexpected response from server in gettermination");
|
|
|
1490 pop_trash (server);
|
|
|
1491 return (-1);
|
|
|
1492 }
|
|
|
1493
|
|
|
1494 return (0);
|
|
|
1495 }
|
|
|
1496 #endif
|
|
|
1497
|
|
|
1498 /*
|
|
|
1499 * Function pop_close
|
|
|
1500 *
|
|
|
1501 * Purpose: Close a pop connection, sending a "RSET" command to try to
|
|
|
1502 * preserve any changes that were made and a "QUIT" command to
|
|
|
1503 * try to get the server to quit, but ignoring any responses that
|
|
|
1504 * are received.
|
|
|
1505 *
|
|
|
1506 * Side effects: The server is unusable after this function returns.
|
|
|
1507 * Changes made to the maildrop since the session was started (or
|
|
|
1508 * since the last pop_reset) may be lost.
|
|
|
1509 */
|
|
|
1510 void
|
|
|
1511 pop_close (popserver server)
|
|
|
1512 {
|
|
|
1513 pop_trash (server);
|
|
|
1514 free ((char *) server);
|
|
|
1515
|
|
|
1516 return;
|
|
|
1517 }
|
|
|
1518
|
|
|
1519 /*
|
|
|
1520 * Function: pop_trash
|
|
|
1521 *
|
|
|
1522 * Purpose: Like pop_close or pop_quit, but doesn't deallocate the
|
|
|
1523 * memory associated with the server. It is legal to call
|
|
|
1524 * pop_close or pop_quit after this function has been called.
|
|
|
1525 */
|
|
|
1526 static void
|
|
|
1527 pop_trash (popserver server)
|
|
|
1528 {
|
|
|
1529 if (server->file >= 0)
|
|
|
1530 {
|
|
|
1531 /* avoid recursion; sendline can call pop_trash */
|
|
|
1532 if (server->trash_started)
|
|
|
1533 return;
|
|
|
1534 server->trash_started = 1;
|
|
|
1535
|
|
|
1536 sendline (server, "RSET");
|
|
|
1537 sendline (server, "QUIT");
|
|
|
1538
|
|
|
1539 CLOSESOCKET (server->file);
|
|
|
1540 server->file = -1;
|
|
|
1541 if (server->buffer)
|
|
|
1542 {
|
|
|
1543 free (server->buffer);
|
|
|
1544 server->buffer = 0;
|
|
|
1545 }
|
|
|
1546 }
|
|
|
1547
|
|
442
|
1548 #ifdef WIN32_NATIVE
|
|
428
|
1549 if (have_winsock)
|
|
|
1550 WSACleanup ();
|
|
|
1551 #endif
|
|
|
1552 }
|
|
|
1553
|
|
3650
|
1554 /* Return a pointer to the first CRLF in IN_STRING, which can contain
|
|
|
1555 embedded nulls and has LEN characters in it not including the final
|
|
|
1556 null, or 0 if it does not contain one. */
|
|
428
|
1557
|
|
|
1558 static char *
|
|
3650
|
1559 find_crlf (char *in_string, int len)
|
|
428
|
1560 {
|
|
3650
|
1561 while (len--)
|
|
428
|
1562 {
|
|
3650
|
1563 if (*in_string == '\r')
|
|
428
|
1564 {
|
|
|
1565 if (*++in_string == '\n')
|
|
|
1566 return (in_string - 1);
|
|
|
1567 }
|
|
|
1568 else
|
|
|
1569 in_string++;
|
|
|
1570 }
|
|
3650
|
1571 return (0);
|
|
428
|
1572 }
|
|
|
1573
|
|
|
1574 #endif /* MAIL_USE_POP */
|
