|
428
|
1 /* pop.c: client routines for talking to a POP3-protocol post-office server
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|
|
2 Copyright (c) 1991, 1993, 1996 Free Software Foundation, Inc.
|
|
771
|
3 Copyright (C) 2001 Ben Wing.
|
|
428
|
4 Written by Jonathan Kamens, jik@security.ov.com.
|
|
|
5
|
|
613
|
6 This file is part of XEmacs.
|
|
428
|
7
|
|
613
|
8 XEmacs is free software; you can redistribute it and/or modify
|
|
428
|
9 it under the terms of the GNU General Public License as published by
|
|
|
10 the Free Software Foundation; either version 2, or (at your option)
|
|
|
11 any later version.
|
|
|
12
|
|
613
|
13 XEmacs is distributed in the hope that it will be useful,
|
|
428
|
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
16 GNU General Public License for more details.
|
|
|
17
|
|
|
18 You should have received a copy of the GNU General Public License
|
|
613
|
19 along with XEmacs; see the file COPYING. If not, write to
|
|
428
|
20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
21 Boston, MA 02111-1307, USA. */
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|
|
22
|
|
|
23 #ifdef HAVE_CONFIG_H
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|
|
24 #define NO_SHORTNAMES /* Tell config not to load remap.h */
|
|
438
|
25 #include <config.h>
|
|
428
|
26 #else
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|
|
27 #define MAIL_USE_POP
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|
|
28 #endif
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|
|
29
|
|
|
30 #ifdef MAIL_USE_POP
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|
|
31
|
|
|
32 #include <sys/types.h>
|
|
442
|
33 #ifdef WIN32_NATIVE
|
|
428
|
34 #include <winsock.h>
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|
|
35 #undef SOCKET_ERROR
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|
|
36 #define RECV(s,buf,len,flags) recv(s,buf,len,flags)
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|
37 #define SEND(s,buf,len,flags) send(s,buf,len,flags)
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|
|
38 #define CLOSESOCKET(s) closesocket(s)
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|
|
39 #else
|
|
|
40 #include <netinet/in.h>
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|
|
41 #include <sys/socket.h>
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|
|
42 #define RECV(s,buf,len,flags) read(s,buf,len)
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|
|
43 #define SEND(s,buf,len,flags) write(s,buf,len)
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|
|
44 #define CLOSESOCKET(s) close(s)
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|
|
45 #endif
|
|
|
46 #include "pop.h"
|
|
2286
|
47 #include "compiler.h"
|
|
428
|
48
|
|
|
49 #ifdef sun
|
|
|
50 #include <malloc.h>
|
|
|
51 #endif /* sun */
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|
|
52
|
|
|
53 #ifdef HESIOD
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|
|
54 #include <hesiod.h>
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|
|
55 /*
|
|
|
56 * It really shouldn't be necessary to put this declaration here, but
|
|
|
57 * the version of hesiod.h that Athena has installed in release 7.2
|
|
|
58 * doesn't declare this function; I don't know if the 7.3 version of
|
|
|
59 * hesiod.h does.
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|
|
60 */
|
|
|
61 extern struct servent *hes_getservbyname (/* char *, char * */);
|
|
|
62 #endif
|
|
|
63
|
|
442
|
64 #include "../src/syspwd.h"
|
|
|
65 #ifndef WIN32_NATIVE
|
|
428
|
66 #include <netdb.h>
|
|
442
|
67 #endif
|
|
428
|
68 #include <errno.h>
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|
|
69 #include <stdio.h>
|
|
|
70
|
|
442
|
71 #ifdef HAVE_UNISTD_H
|
|
428
|
72 #include <unistd.h>
|
|
442
|
73 #endif
|
|
428
|
74 #include <sys/stat.h>
|
|
442
|
75 #ifndef WIN32_NATIVE
|
|
428
|
76 #include <sys/file.h>
|
|
442
|
77 #endif
|
|
428
|
78 #include "../src/syswait.h"
|
|
442
|
79 #ifndef WIN32_NATIVE
|
|
428
|
80 #include "../src/systime.h"
|
|
|
81 #endif
|
|
|
82 #include <stdlib.h>
|
|
|
83 #include <string.h>
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|
|
84
|
|
|
85 #ifdef KERBEROS
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|
|
86 #ifndef KRB5
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|
|
87 #include <des.h>
|
|
|
88 #include <krb.h>
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|
|
89 #else /* KRB5 */
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|
|
90 #include <krb5/krb5.h>
|
|
|
91 #include <krb5/ext-proto.h>
|
|
|
92 #include <ctype.h>
|
|
|
93 #endif /* KRB5 */
|
|
|
94 #endif /* KERBEROS */
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|
|
95
|
|
|
96 #ifdef KERBEROS
|
|
|
97 #ifndef KRB5
|
|
|
98 extern int krb_sendauth (/* long, int, KTEXT, char *, char *, char *,
|
|
458
|
99 unsigned long, MSG_DAT *, CREDENTIALS *, Key_schedule,
|
|
428
|
100 struct sockaddr_in *, struct sockaddr_in *,
|
|
|
101 char * */);
|
|
|
102 extern char *krb_realmofhost (/* char * */);
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|
|
103 #endif /* ! KRB5 */
|
|
|
104 #endif /* KERBEROS */
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|
|
105
|
|
442
|
106 #ifndef WIN32_NATIVE
|
|
428
|
107 #if !defined(HAVE_H_ERRNO) || !defined(HAVE_CONFIG_H)
|
|
|
108 extern int h_errno;
|
|
|
109 #endif
|
|
|
110 #endif
|
|
|
111
|
|
|
112 static int socket_connection (char *, int);
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|
|
113 static char *pop_getline (popserver);
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|
|
114 static int sendline (popserver, char *);
|
|
|
115 static int fullwrite (int, char *, int);
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|
|
116 static int getok (popserver);
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|
|
117 #if 0
|
|
|
118 static int gettermination (popserver);
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|
|
119 #endif
|
|
|
120 static void pop_trash (popserver);
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|
|
121 static char *find_crlf (char *);
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|
|
122
|
|
|
123 #define ERROR_MAX 80 /* a pretty arbitrary size */
|
|
|
124 #define POP_PORT 110
|
|
|
125 #define KPOP_PORT 1109
|
|
442
|
126 #if defined(WIN32_NATIVE) || defined(CYGWIN)
|
|
428
|
127 #define POP_SERVICE "pop3" /* we don't want the POP2 port! */
|
|
|
128 #else
|
|
|
129 #define POP_SERVICE "pop"
|
|
|
130 #endif
|
|
|
131 #ifdef KERBEROS
|
|
|
132 #ifdef KRB5
|
|
|
133 #define KPOP_SERVICE "k5pop";
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|
|
134 #else
|
|
|
135 #define KPOP_SERVICE "kpop"
|
|
|
136 #endif
|
|
|
137 #endif
|
|
|
138
|
|
|
139 char pop_error[ERROR_MAX];
|
|
|
140 int pop_debug = 0;
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|
|
141
|
|
|
142 #ifndef min
|
|
|
143 #define min(a,b) (((a) < (b)) ? (a) : (b))
|
|
|
144 #endif
|
|
|
145
|
|
|
146 /*
|
|
|
147 * Function: pop_open (char *host, char *username, char *password,
|
|
|
148 * int flags)
|
|
|
149 *
|
|
|
150 * Purpose: Establishes a connection with a post-office server, and
|
|
|
151 * completes the authorization portion of the session.
|
|
|
152 *
|
|
|
153 * Arguments:
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|
|
154 * host The server host with which the connection should be
|
|
|
155 * established. Optional. If omitted, internal
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|
|
156 * heuristics will be used to determine the server host,
|
|
|
157 * if possible.
|
|
|
158 * username
|
|
|
159 * The username of the mail-drop to access. Optional.
|
|
|
160 * If omitted, internal heuristics will be used to
|
|
|
161 * determine the username, if possible.
|
|
|
162 * password
|
|
|
163 * The password to use for authorization. If omitted,
|
|
|
164 * internal heuristics will be used to determine the
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|
|
165 * password, if possible.
|
|
|
166 * flags A bit mask containing flags controlling certain
|
|
|
167 * functions of the routine. Valid flags are defined in
|
|
|
168 * the file pop.h
|
|
|
169 *
|
|
|
170 * Return value: Upon successful establishment of a connection, a
|
|
|
171 * non-null popserver will be returned. Otherwise, null will be
|
|
|
172 * returned, and the string variable pop_error will contain an
|
|
|
173 * explanation of the error.
|
|
|
174 */
|
|
|
175 popserver
|
|
|
176 pop_open (char *host, char *username, char *password, int flags)
|
|
|
177 {
|
|
|
178 int sock;
|
|
|
179 popserver server;
|
|
|
180
|
|
|
181 /* Determine the user name */
|
|
|
182 if (! username)
|
|
|
183 {
|
|
|
184 username = getenv ("USER");
|
|
|
185 if (! (username && *username))
|
|
|
186 {
|
|
442
|
187 #ifndef WIN32_NATIVE
|
|
428
|
188 username = getlogin ();
|
|
|
189 if (! (username && *username))
|
|
|
190 {
|
|
|
191 struct passwd *passwd;
|
|
|
192 passwd = getpwuid (getuid ());
|
|
|
193 if (passwd && passwd->pw_name && *passwd->pw_name)
|
|
|
194 {
|
|
|
195 username = passwd->pw_name;
|
|
|
196 }
|
|
|
197 else
|
|
|
198 {
|
|
|
199 strcpy (pop_error, "Could not determine username");
|
|
|
200 return (0);
|
|
|
201 }
|
|
|
202 }
|
|
|
203 #else
|
|
|
204 strcpy (pop_error, "Could not determine username");
|
|
|
205 return (0);
|
|
|
206 #endif
|
|
|
207 }
|
|
|
208 }
|
|
|
209
|
|
|
210 /*
|
|
|
211 * Determine the mail host.
|
|
|
212 */
|
|
|
213
|
|
|
214 if (! host)
|
|
|
215 {
|
|
|
216 host = getenv ("MAILHOST");
|
|
|
217 }
|
|
|
218
|
|
|
219 #ifdef HESIOD
|
|
|
220 if ((! host) && (! (flags & POP_NO_HESIOD)))
|
|
|
221 {
|
|
|
222 struct hes_postoffice *office;
|
|
|
223 office = hes_getmailhost (username);
|
|
|
224 if (office && office->po_type && (! strcmp (office->po_type, "POP"))
|
|
|
225 && office->po_name && *office->po_name && office->po_host
|
|
|
226 && *office->po_host)
|
|
|
227 {
|
|
|
228 host = office->po_host;
|
|
|
229 username = office->po_name;
|
|
|
230 }
|
|
|
231 }
|
|
|
232 #endif
|
|
|
233
|
|
|
234 #ifdef MAILHOST
|
|
|
235 if (! host)
|
|
|
236 {
|
|
|
237 host = MAILHOST;
|
|
|
238 }
|
|
|
239 #endif
|
|
|
240
|
|
|
241 if (! host)
|
|
|
242 {
|
|
|
243 strcpy (pop_error, "Could not determine POP server");
|
|
|
244 return (0);
|
|
|
245 }
|
|
|
246
|
|
|
247 /* Determine the password */
|
|
|
248 #ifdef KERBEROS
|
|
|
249 #define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS))
|
|
|
250 #else
|
|
|
251 #define DONT_NEED_PASSWORD 0
|
|
|
252 #endif
|
|
|
253
|
|
|
254 if ((! password) && (! DONT_NEED_PASSWORD))
|
|
|
255 {
|
|
442
|
256 #ifndef WIN32_NATIVE
|
|
428
|
257 if (! (flags & POP_NO_GETPASS))
|
|
|
258 {
|
|
|
259 password = getpass ("Enter POP password:");
|
|
|
260 }
|
|
|
261 #endif
|
|
|
262 if (! password)
|
|
|
263 {
|
|
|
264 strcpy (pop_error, "Could not determine POP password");
|
|
|
265 return (0);
|
|
|
266 }
|
|
|
267 }
|
|
|
268 if (password)
|
|
|
269 flags |= POP_NO_KERBEROS;
|
|
|
270 else
|
|
|
271 password = username;
|
|
|
272
|
|
|
273 sock = socket_connection (host, flags);
|
|
|
274 if (sock == -1)
|
|
|
275 return (0);
|
|
|
276
|
|
|
277 server = (popserver) malloc (sizeof (struct _popserver));
|
|
|
278 if (! server)
|
|
|
279 {
|
|
|
280 strcpy (pop_error, "Out of memory in pop_open");
|
|
|
281 return (0);
|
|
|
282 }
|
|
|
283 server->buffer = (char *) malloc (GETLINE_MIN);
|
|
|
284 if (! server->buffer)
|
|
|
285 {
|
|
|
286 strcpy (pop_error, "Out of memory in pop_open");
|
|
|
287 free ((char *) server);
|
|
|
288 return (0);
|
|
|
289 }
|
|
|
290
|
|
|
291 server->file = sock;
|
|
|
292 server->data = 0;
|
|
|
293 server->buffer_index = 0;
|
|
|
294 server->buffer_size = GETLINE_MIN;
|
|
|
295 server->in_multi = 0;
|
|
|
296 server->trash_started = 0;
|
|
|
297
|
|
|
298 if (getok (server))
|
|
|
299 return (0);
|
|
|
300
|
|
|
301 /*
|
|
|
302 * I really shouldn't use the pop_error variable like this, but....
|
|
|
303 */
|
|
|
304 if (strlen (username) > ERROR_MAX - 6)
|
|
|
305 {
|
|
|
306 pop_close (server);
|
|
|
307 strcpy (pop_error,
|
|
|
308 "Username too long; recompile pop.c with larger ERROR_MAX");
|
|
|
309 return (0);
|
|
|
310 }
|
|
|
311 sprintf (pop_error, "USER %s", username);
|
|
|
312
|
|
|
313 if (sendline (server, pop_error) || getok (server))
|
|
|
314 {
|
|
|
315 return (0);
|
|
|
316 }
|
|
|
317
|
|
|
318 if (strlen (password) > ERROR_MAX - 6)
|
|
|
319 {
|
|
|
320 pop_close (server);
|
|
|
321 strcpy (pop_error,
|
|
|
322 "Password too long; recompile pop.c with larger ERROR_MAX");
|
|
|
323 return (0);
|
|
|
324 }
|
|
|
325 sprintf (pop_error, "PASS %s", password);
|
|
|
326
|
|
|
327 if (sendline (server, pop_error) || getok (server))
|
|
|
328 {
|
|
|
329 return (0);
|
|
|
330 }
|
|
|
331
|
|
|
332 return (server);
|
|
|
333 }
|
|
|
334
|
|
|
335 /*
|
|
|
336 * Function: pop_stat
|
|
|
337 *
|
|
|
338 * Purpose: Issue the STAT command to the server and return (in the
|
|
|
339 * value parameters) the number of messages in the maildrop and
|
|
|
340 * the total size of the maildrop.
|
|
|
341 *
|
|
|
342 * Return value: 0 on success, or non-zero with an error in pop_error
|
|
|
343 * in failure.
|
|
|
344 *
|
|
|
345 * Side effects: On failure, may make further operations on the
|
|
|
346 * connection impossible.
|
|
|
347 */
|
|
|
348 int
|
|
|
349 pop_stat (popserver server, int *count, int *size)
|
|
|
350 {
|
|
|
351 char *fromserver;
|
|
|
352
|
|
|
353 if (server->in_multi)
|
|
|
354 {
|
|
|
355 strcpy (pop_error, "In multi-line query in pop_stat");
|
|
|
356 return (-1);
|
|
|
357 }
|
|
|
358
|
|
|
359 if (sendline (server, "STAT") || (! (fromserver = pop_getline (server))))
|
|
|
360 return (-1);
|
|
|
361
|
|
|
362 if (strncmp (fromserver, "+OK ", 4))
|
|
|
363 {
|
|
|
364 if (0 == strncmp (fromserver, "-ERR", 4))
|
|
|
365 {
|
|
|
366 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
367 }
|
|
|
368 else
|
|
|
369 {
|
|
|
370 strcpy (pop_error,
|
|
|
371 "Unexpected response from POP server in pop_stat");
|
|
|
372 pop_trash (server);
|
|
|
373 }
|
|
|
374 return (-1);
|
|
|
375 }
|
|
|
376
|
|
|
377 *count = atoi (&fromserver[4]);
|
|
|
378
|
|
|
379 fromserver = strchr (&fromserver[4], ' ');
|
|
|
380 if (! fromserver)
|
|
|
381 {
|
|
|
382 strcpy (pop_error,
|
|
|
383 "Badly formatted response from server in pop_stat");
|
|
|
384 pop_trash (server);
|
|
|
385 return (-1);
|
|
|
386 }
|
|
|
387
|
|
|
388 *size = atoi (fromserver + 1);
|
|
|
389
|
|
|
390 return (0);
|
|
|
391 }
|
|
|
392
|
|
|
393 /*
|
|
|
394 * Function: pop_list
|
|
|
395 *
|
|
|
396 * Purpose: Performs the POP "list" command and returns (in value
|
|
|
397 * parameters) two malloc'd zero-terminated arrays -- one of
|
|
|
398 * message IDs, and a parallel one of sizes.
|
|
|
399 *
|
|
|
400 * Arguments:
|
|
|
401 * server The pop connection to talk to.
|
|
|
402 * message The number of the one message about which to get
|
|
|
403 * information, or 0 to get information about all
|
|
|
404 * messages.
|
|
|
405 *
|
|
|
406 * Return value: 0 on success, non-zero with error in pop_error on
|
|
|
407 * failure.
|
|
|
408 *
|
|
|
409 * Side effects: On failure, may make further operations on the
|
|
|
410 * connection impossible.
|
|
|
411 */
|
|
|
412 int
|
|
|
413 pop_list (popserver server, int message, int **IDs, int **sizes)
|
|
|
414 {
|
|
|
415 int how_many, i;
|
|
|
416 char *fromserver;
|
|
|
417
|
|
|
418 if (server->in_multi)
|
|
|
419 {
|
|
|
420 strcpy (pop_error, "In multi-line query in pop_list");
|
|
|
421 return (-1);
|
|
|
422 }
|
|
|
423
|
|
|
424 if (message)
|
|
|
425 how_many = 1;
|
|
|
426 else
|
|
|
427 {
|
|
|
428 int count, size;
|
|
|
429 if (pop_stat (server, &count, &size))
|
|
|
430 return (-1);
|
|
|
431 how_many = count;
|
|
|
432 }
|
|
|
433
|
|
|
434 *IDs = (int *) malloc ((how_many + 1) * sizeof (int));
|
|
|
435 *sizes = (int *) malloc ((how_many + 1) * sizeof (int));
|
|
|
436 if (! (*IDs && *sizes))
|
|
|
437 {
|
|
|
438 strcpy (pop_error, "Out of memory in pop_list");
|
|
|
439 return (-1);
|
|
|
440 }
|
|
|
441
|
|
|
442 if (message)
|
|
|
443 {
|
|
|
444 sprintf (pop_error, "LIST %d", message);
|
|
|
445 if (sendline (server, pop_error))
|
|
|
446 {
|
|
|
447 free ((char *) *IDs);
|
|
|
448 free ((char *) *sizes);
|
|
|
449 return (-1);
|
|
|
450 }
|
|
|
451 if (! (fromserver = pop_getline (server)))
|
|
|
452 {
|
|
|
453 free ((char *) *IDs);
|
|
|
454 free ((char *) *sizes);
|
|
|
455 return (-1);
|
|
|
456 }
|
|
|
457 if (strncmp (fromserver, "+OK ", 4))
|
|
|
458 {
|
|
|
459 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
460 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
461 else
|
|
|
462 {
|
|
|
463 strcpy (pop_error,
|
|
|
464 "Unexpected response from server in pop_list");
|
|
|
465 pop_trash (server);
|
|
|
466 }
|
|
|
467 free ((char *) *IDs);
|
|
|
468 free ((char *) *sizes);
|
|
|
469 return (-1);
|
|
|
470 }
|
|
|
471 (*IDs)[0] = atoi (&fromserver[4]);
|
|
|
472 fromserver = strchr (&fromserver[4], ' ');
|
|
|
473 if (! fromserver)
|
|
|
474 {
|
|
|
475 strcpy (pop_error,
|
|
|
476 "Badly formatted response from server in pop_list");
|
|
|
477 pop_trash (server);
|
|
|
478 free ((char *) *IDs);
|
|
|
479 free ((char *) *sizes);
|
|
|
480 return (-1);
|
|
|
481 }
|
|
|
482 (*sizes)[0] = atoi (fromserver);
|
|
|
483 (*IDs)[1] = (*sizes)[1] = 0;
|
|
|
484 return (0);
|
|
|
485 }
|
|
|
486 else
|
|
|
487 {
|
|
|
488 if (pop_multi_first (server, "LIST", &fromserver))
|
|
|
489 {
|
|
|
490 free ((char *) *IDs);
|
|
|
491 free ((char *) *sizes);
|
|
|
492 return (-1);
|
|
|
493 }
|
|
|
494 for (i = 0; i < how_many; i++)
|
|
|
495 {
|
|
|
496 if (pop_multi_next (server, &fromserver))
|
|
|
497 {
|
|
|
498 free ((char *) *IDs);
|
|
|
499 free ((char *) *sizes);
|
|
|
500 return (-1);
|
|
|
501 }
|
|
|
502 (*IDs)[i] = atoi (fromserver);
|
|
|
503 fromserver = strchr (fromserver, ' ');
|
|
|
504 if (! fromserver)
|
|
|
505 {
|
|
|
506 strcpy (pop_error,
|
|
|
507 "Badly formatted response from server in pop_list");
|
|
|
508 free ((char *) *IDs);
|
|
|
509 free ((char *) *sizes);
|
|
|
510 pop_trash (server);
|
|
|
511 return (-1);
|
|
|
512 }
|
|
|
513 (*sizes)[i] = atoi (fromserver);
|
|
|
514 }
|
|
|
515 if (pop_multi_next (server, &fromserver))
|
|
|
516 {
|
|
|
517 free ((char *) *IDs);
|
|
|
518 free ((char *) *sizes);
|
|
|
519 return (-1);
|
|
|
520 }
|
|
|
521 else if (fromserver)
|
|
|
522 {
|
|
|
523 strcpy (pop_error,
|
|
|
524 "Too many response lines from server in pop_list");
|
|
|
525 free ((char *) *IDs);
|
|
|
526 free ((char *) *sizes);
|
|
|
527 return (-1);
|
|
|
528 }
|
|
|
529 (*IDs)[i] = (*sizes)[i] = 0;
|
|
|
530 return (0);
|
|
|
531 }
|
|
|
532 }
|
|
|
533
|
|
|
534 /*
|
|
|
535 * Function: pop_retrieve
|
|
|
536 *
|
|
|
537 * Purpose: Retrieve a specified message from the maildrop.
|
|
|
538 *
|
|
|
539 * Arguments:
|
|
|
540 * server The server to retrieve from.
|
|
|
541 * message The message number to retrieve.
|
|
|
542 * markfrom
|
|
|
543 * If true, then mark the string "From " at the beginning
|
|
|
544 * of lines with '>'.
|
|
|
545 *
|
|
|
546 * Return value: A string pointing to the message, if successful, or
|
|
|
547 * null with pop_error set if not.
|
|
|
548 *
|
|
|
549 * Side effects: May kill connection on error.
|
|
|
550 */
|
|
|
551 char *
|
|
|
552 pop_retrieve (popserver server, int message, int markfrom)
|
|
|
553 {
|
|
|
554 int *IDs, *sizes, bufsize, fromcount = 0, cp = 0;
|
|
|
555 char *ptr, *fromserver;
|
|
|
556 int ret;
|
|
|
557
|
|
|
558 if (server->in_multi)
|
|
|
559 {
|
|
|
560 strcpy (pop_error, "In multi-line query in pop_retrieve");
|
|
|
561 return (0);
|
|
|
562 }
|
|
|
563
|
|
|
564 if (pop_list (server, message, &IDs, &sizes))
|
|
|
565 return (0);
|
|
|
566
|
|
|
567 if (pop_retrieve_first (server, message, &fromserver))
|
|
|
568 {
|
|
|
569 return (0);
|
|
|
570 }
|
|
|
571
|
|
|
572 /*
|
|
|
573 * The "5" below is an arbitrary constant -- I assume that if
|
|
|
574 * there are "From" lines in the text to be marked, there
|
|
|
575 * probably won't be more than 5 of them. If there are, I
|
|
|
576 * allocate more space for them below.
|
|
|
577 */
|
|
|
578 bufsize = sizes[0] + (markfrom ? 5 : 0);
|
|
|
579 ptr = (char *)malloc (bufsize);
|
|
|
580 free ((char *) IDs);
|
|
|
581 free ((char *) sizes);
|
|
|
582
|
|
|
583 if (! ptr)
|
|
|
584 {
|
|
|
585 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
586 pop_retrieve_flush (server);
|
|
|
587 return (0);
|
|
|
588 }
|
|
|
589
|
|
|
590 while (! (ret = pop_retrieve_next (server, &fromserver)))
|
|
|
591 {
|
|
|
592 int linesize;
|
|
|
593
|
|
|
594 if (! fromserver)
|
|
|
595 {
|
|
|
596 ptr[cp] = '\0';
|
|
|
597 return (ptr);
|
|
|
598 }
|
|
|
599 if (markfrom && fromserver[0] == 'F' && fromserver[1] == 'r' &&
|
|
|
600 fromserver[2] == 'o' && fromserver[3] == 'm' &&
|
|
|
601 fromserver[4] == ' ')
|
|
|
602 {
|
|
|
603 if (++fromcount == 5)
|
|
|
604 {
|
|
|
605 bufsize += 5;
|
|
|
606 ptr = (char *)realloc (ptr, bufsize);
|
|
|
607 if (! ptr)
|
|
|
608 {
|
|
|
609 strcpy (pop_error, "Out of memory in pop_retrieve");
|
|
|
610 pop_retrieve_flush (server);
|
|
|
611 return (0);
|
|
|
612 }
|
|
|
613 fromcount = 0;
|
|
|
614 }
|
|
|
615 ptr[cp++] = '>';
|
|
|
616 }
|
|
|
617 linesize = strlen (fromserver);
|
|
|
618 memcpy (&ptr[cp], fromserver, linesize);
|
|
|
619 cp += linesize;
|
|
|
620 ptr[cp++] = '\n';
|
|
|
621 }
|
|
|
622
|
|
|
623 if (ret)
|
|
|
624 {
|
|
|
625 free (ptr);
|
|
|
626 /* return (0); */
|
|
|
627 }
|
|
|
628 /* This function used to fall off the end, but that doesn't make any sense */
|
|
|
629 return (0);
|
|
|
630 }
|
|
|
631
|
|
|
632 int
|
|
|
633 pop_retrieve_first (popserver server, int message, char **response)
|
|
|
634 {
|
|
|
635 sprintf (pop_error, "RETR %d", message);
|
|
|
636 return (pop_multi_first (server, pop_error, response));
|
|
|
637 }
|
|
|
638
|
|
|
639 int
|
|
|
640 pop_retrieve_next (popserver server, char **line)
|
|
|
641 {
|
|
|
642 return (pop_multi_next (server, line));
|
|
|
643 }
|
|
|
644
|
|
|
645 int
|
|
|
646 pop_retrieve_flush (popserver server)
|
|
|
647 {
|
|
|
648 return (pop_multi_flush (server));
|
|
|
649 }
|
|
|
650
|
|
|
651 int
|
|
|
652 pop_top_first (popserver server, int message, int lines, char **response)
|
|
|
653 {
|
|
|
654 sprintf (pop_error, "TOP %d %d", message, lines);
|
|
|
655 return (pop_multi_first (server, pop_error, response));
|
|
|
656 }
|
|
|
657
|
|
|
658 int
|
|
|
659 pop_top_next (popserver server, char **line)
|
|
|
660 {
|
|
|
661 return (pop_multi_next (server, line));
|
|
|
662 }
|
|
|
663
|
|
|
664 int
|
|
|
665 pop_top_flush (popserver server)
|
|
|
666 {
|
|
|
667 return (pop_multi_flush (server));
|
|
|
668 }
|
|
|
669
|
|
|
670 int
|
|
|
671 pop_multi_first (popserver server, char *command, char **response)
|
|
|
672 {
|
|
|
673 if (server->in_multi)
|
|
|
674 {
|
|
|
675 strcpy (pop_error,
|
|
|
676 "Already in multi-line query in pop_multi_first");
|
|
|
677 return (-1);
|
|
|
678 }
|
|
|
679
|
|
|
680 if (sendline (server, command) || (! (*response = pop_getline (server))))
|
|
|
681 {
|
|
|
682 return (-1);
|
|
|
683 }
|
|
|
684
|
|
|
685 if (0 == strncmp (*response, "-ERR", 4))
|
|
|
686 {
|
|
|
687 strncpy (pop_error, *response, ERROR_MAX);
|
|
|
688 return (-1);
|
|
|
689 }
|
|
|
690 else if (0 == strncmp (*response, "+OK", 3))
|
|
|
691 {
|
|
|
692 for (*response += 3; **response == ' '; (*response)++) /* empty */;
|
|
|
693 server->in_multi = 1;
|
|
|
694 return (0);
|
|
|
695 }
|
|
|
696 else
|
|
|
697 {
|
|
|
698 strcpy (pop_error,
|
|
|
699 "Unexpected response from server in pop_multi_first");
|
|
|
700 return (-1);
|
|
|
701 }
|
|
|
702 }
|
|
|
703
|
|
|
704 int
|
|
|
705 pop_multi_next (popserver server, char **line)
|
|
|
706 {
|
|
|
707 char *fromserver;
|
|
|
708
|
|
|
709 if (! server->in_multi)
|
|
|
710 {
|
|
|
711 strcpy (pop_error, "Not in multi-line query in pop_multi_next");
|
|
|
712 return (-1);
|
|
|
713 }
|
|
|
714
|
|
|
715 fromserver = pop_getline (server);
|
|
|
716 if (! fromserver)
|
|
|
717 {
|
|
|
718 return (-1);
|
|
|
719 }
|
|
|
720
|
|
|
721 if (fromserver[0] == '.')
|
|
|
722 {
|
|
|
723 if (! fromserver[1])
|
|
|
724 {
|
|
|
725 *line = 0;
|
|
|
726 server->in_multi = 0;
|
|
|
727 return (0);
|
|
|
728 }
|
|
|
729 else
|
|
|
730 {
|
|
|
731 *line = fromserver + 1;
|
|
|
732 return (0);
|
|
|
733 }
|
|
|
734 }
|
|
|
735 else
|
|
|
736 {
|
|
|
737 *line = fromserver;
|
|
|
738 return (0);
|
|
|
739 }
|
|
|
740 }
|
|
|
741
|
|
|
742 int
|
|
|
743 pop_multi_flush (popserver server)
|
|
|
744 {
|
|
|
745 char *line;
|
|
|
746
|
|
|
747 if (! server->in_multi)
|
|
|
748 {
|
|
|
749 return (0);
|
|
|
750 }
|
|
|
751
|
|
|
752 while (! pop_multi_next (server, &line))
|
|
|
753 {
|
|
|
754 if (! line)
|
|
|
755 {
|
|
|
756 return (0);
|
|
|
757 }
|
|
|
758 }
|
|
|
759
|
|
|
760 return (-1);
|
|
|
761 }
|
|
|
762
|
|
|
763 /* Function: pop_delete
|
|
|
764 *
|
|
|
765 * Purpose: Delete a specified message.
|
|
|
766 *
|
|
|
767 * Arguments:
|
|
|
768 * server Server from which to delete the message.
|
|
|
769 * message Message to delete.
|
|
|
770 *
|
|
|
771 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
772 * otherwise.
|
|
|
773 */
|
|
|
774 int
|
|
|
775 pop_delete (popserver server, int message)
|
|
|
776 {
|
|
|
777 if (server->in_multi)
|
|
|
778 {
|
|
|
779 strcpy (pop_error, "In multi-line query in pop_delete");
|
|
|
780 return (-1);
|
|
|
781 }
|
|
|
782
|
|
|
783 sprintf (pop_error, "DELE %d", message);
|
|
|
784
|
|
|
785 if (sendline (server, pop_error) || getok (server))
|
|
|
786 return (-1);
|
|
|
787
|
|
|
788 return (0);
|
|
|
789 }
|
|
|
790
|
|
|
791 /*
|
|
|
792 * Function: pop_noop
|
|
|
793 *
|
|
|
794 * Purpose: Send a noop command to the server.
|
|
|
795 *
|
|
|
796 * Argument:
|
|
|
797 * server The server to send to.
|
|
|
798 *
|
|
|
799 * Return value: 0 on success, non-zero with error in pop_error
|
|
|
800 * otherwise.
|
|
|
801 *
|
|
|
802 * Side effects: Closes connection on error.
|
|
|
803 */
|
|
|
804 int
|
|
|
805 pop_noop (popserver server)
|
|
|
806 {
|
|
|
807 if (server->in_multi)
|
|
|
808 {
|
|
|
809 strcpy (pop_error, "In multi-line query in pop_noop");
|
|
|
810 return (-1);
|
|
|
811 }
|
|
|
812
|
|
|
813 if (sendline (server, "NOOP") || getok (server))
|
|
|
814 return (-1);
|
|
|
815
|
|
|
816 return (0);
|
|
|
817 }
|
|
|
818
|
|
|
819 /*
|
|
|
820 * Function: pop_last
|
|
|
821 *
|
|
|
822 * Purpose: Find out the highest seen message from the server.
|
|
|
823 *
|
|
|
824 * Arguments:
|
|
|
825 * server The server.
|
|
|
826 *
|
|
|
827 * Return value: If successful, the highest seen message, which is
|
|
|
828 * greater than or equal to 0. Otherwise, a negative number with
|
|
|
829 * the error explained in pop_error.
|
|
|
830 *
|
|
|
831 * Side effects: Closes the connection on error.
|
|
|
832 */
|
|
|
833 int
|
|
|
834 pop_last (popserver server)
|
|
|
835 {
|
|
|
836 char *fromserver;
|
|
|
837
|
|
|
838 if (server->in_multi)
|
|
|
839 {
|
|
|
840 strcpy (pop_error, "In multi-line query in pop_last");
|
|
|
841 return (-1);
|
|
|
842 }
|
|
|
843
|
|
|
844 if (sendline (server, "LAST"))
|
|
|
845 return (-1);
|
|
|
846
|
|
|
847 if (! (fromserver = pop_getline (server)))
|
|
|
848 return (-1);
|
|
|
849
|
|
|
850 if (! strncmp (fromserver, "-ERR", 4))
|
|
|
851 {
|
|
|
852 strncpy (pop_error, fromserver, ERROR_MAX);
|
|
|
853 return (-1);
|
|
|
854 }
|
|
|
855 else if (strncmp (fromserver, "+OK ", 4))
|
|
|
856 {
|
|
|
857 strcpy (pop_error, "Unexpected response from server in pop_last");
|
|
|
858 pop_trash (server);
|
|
|
859 return (-1);
|
|
|
860 }
|
|
|
861 else
|
|
|
862 {
|
|
|
863 return (atoi (&fromserver[4]));
|
|
|
864 }
|
|
|
865 }
|
|
|
866
|
|
|
867 /*
|
|
|
868 * Function: pop_reset
|
|
|
869 *
|
|
|
870 * Purpose: Reset the server to its initial connect state
|
|
|
871 *
|
|
|
872 * Arguments:
|
|
|
873 * server The server.
|
|
|
874 *
|
|
|
875 * Return value: 0 for success, non-0 with error in pop_error
|
|
|
876 * otherwise.
|
|
|
877 *
|
|
|
878 * Side effects: Closes the connection on error.
|
|
|
879 */
|
|
|
880 int
|
|
|
881 pop_reset (popserver server)
|
|
|
882 {
|
|
|
883 if (pop_retrieve_flush (server))
|
|
|
884 {
|
|
|
885 return (-1);
|
|
|
886 }
|
|
|
887
|
|
|
888 if (sendline (server, "RSET") || getok (server))
|
|
|
889 return (-1);
|
|
|
890
|
|
|
891 return (0);
|
|
|
892 }
|
|
|
893
|
|
|
894 /*
|
|
|
895 * Function: pop_quit
|
|
|
896 *
|
|
|
897 * Purpose: Quit the connection to the server,
|
|
|
898 *
|
|
|
899 * Arguments:
|
|
|
900 * server The server to quit.
|
|
|
901 *
|
|
|
902 * Return value: 0 for success, non-zero otherwise with error in
|
|
|
903 * pop_error.
|
|
|
904 *
|
|
|
905 * Side Effects: The popserver passed in is unusable after this
|
|
|
906 * function is called, even if an error occurs.
|
|
|
907 */
|
|
|
908 int
|
|
|
909 pop_quit (popserver server)
|
|
|
910 {
|
|
|
911 int ret = 0;
|
|
|
912
|
|
|
913 if (server->file >= 0)
|
|
|
914 {
|
|
|
915 if (pop_retrieve_flush (server))
|
|
|
916 {
|
|
|
917 ret = -1;
|
|
|
918 }
|
|
|
919
|
|
|
920 if (sendline (server, "QUIT") || getok (server))
|
|
|
921 {
|
|
|
922 ret = -1;
|
|
|
923 }
|
|
|
924
|
|
|
925 CLOSESOCKET (server->file);
|
|
|
926 }
|
|
|
927
|
|
|
928 if (server->buffer)
|
|
|
929 free (server->buffer);
|
|
|
930 free ((char *) server);
|
|
|
931
|
|
|
932 return (ret);
|
|
|
933 }
|
|
|
934
|
|
442
|
935 #ifdef WIN32_NATIVE
|
|
428
|
936 static int have_winsock = 0;
|
|
|
937 #endif
|
|
|
938
|
|
|
939 /*
|
|
|
940 * Function: socket_connection
|
|
|
941 *
|
|
|
942 * Purpose: Opens the network connection with the mail host, without
|
|
|
943 * doing any sort of I/O with it or anything.
|
|
|
944 *
|
|
|
945 * Arguments:
|
|
|
946 * host The host to which to connect.
|
|
|
947 * flags Option flags.
|
|
|
948 *
|
|
|
949 * Return value: A file descriptor indicating the connection, or -1
|
|
|
950 * indicating failure, in which case an error has been copied
|
|
|
951 * into pop_error.
|
|
|
952 */
|
|
|
953 static int
|
|
2286
|
954 socket_connection (char *host,
|
|
|
955 #if defined (KERBEROS) || defined (HESIOD)
|
|
|
956 int flags
|
|
|
957 #else
|
|
|
958 int UNUSED (flags)
|
|
|
959 #endif
|
|
|
960 )
|
|
428
|
961 {
|
|
|
962 struct hostent *hostent;
|
|
|
963 struct servent *servent;
|
|
|
964 struct sockaddr_in addr;
|
|
|
965 char found_port = 0;
|
|
|
966 char *service;
|
|
|
967 int sock;
|
|
|
968 #ifdef KERBEROS
|
|
|
969 #ifdef KRB5
|
|
|
970 krb5_error_code rem;
|
|
|
971 krb5_ccache ccdef;
|
|
|
972 krb5_principal client, server;
|
|
|
973 krb5_error *err_ret;
|
|
|
974 register char *cp;
|
|
|
975 #else
|
|
|
976 KTEXT ticket;
|
|
|
977 MSG_DAT msg_data;
|
|
|
978 CREDENTIALS cred;
|
|
|
979 Key_schedule schedule;
|
|
|
980 int rem;
|
|
|
981 #endif /* KRB5 */
|
|
|
982 #endif /* KERBEROS */
|
|
|
983
|
|
|
984 int try_count = 0;
|
|
|
985
|
|
442
|
986 #ifdef WIN32_NATIVE
|
|
428
|
987 {
|
|
|
988 WSADATA winsockData;
|
|
|
989 if (WSAStartup (0x101, &winsockData) == 0)
|
|
|
990 have_winsock = 1;
|
|
|
991 }
|
|
|
992 #endif
|
|
|
993
|
|
|
994 do
|
|
|
995 {
|
|
|
996 hostent = gethostbyname (host);
|
|
|
997 try_count++;
|
|
|
998 if ((! hostent)
|
|
|
999 && ((h_errno != TRY_AGAIN) || (try_count == 5))
|
|
|
1000 )
|
|
|
1001 {
|
|
|
1002 strcpy (pop_error, "Could not determine POP server's address");
|
|
|
1003 return (-1);
|
|
|
1004 }
|
|
|
1005 } while (! hostent);
|
|
|
1006
|
|
|
1007 memset (&addr, 0, sizeof (addr));
|
|
|
1008 addr.sin_family = AF_INET;
|
|
|
1009
|
|
|
1010 #ifdef KERBEROS
|
|
|
1011 service = (flags & POP_NO_KERBEROS) ? POP_SERVICE : KPOP_SERVICE;
|
|
|
1012 #else
|
|
|
1013 service = POP_SERVICE;
|
|
|
1014 #endif
|
|
|
1015
|
|
|
1016 #ifdef HESIOD
|
|
|
1017 if (! (flags & POP_NO_HESIOD))
|
|
|
1018 {
|
|
|
1019 servent = hes_getservbyname (service, "tcp");
|
|
|
1020 if (servent)
|
|
|
1021 {
|
|
|
1022 addr.sin_port = servent->s_port;
|
|
|
1023 found_port = 1;
|
|
|
1024 }
|
|
|
1025 }
|
|
|
1026 #endif
|
|
|
1027 if (! found_port)
|
|
|
1028 {
|
|
|
1029 servent = getservbyname (service, "tcp");
|
|
|
1030 if (servent)
|
|
|
1031 {
|
|
|
1032 addr.sin_port = servent->s_port;
|
|
|
1033 }
|
|
|
1034 else
|
|
|
1035 {
|
|
|
1036 #ifdef KERBEROS
|
|
|
1037 addr.sin_port = htons ((flags & POP_NO_KERBEROS) ?
|
|
|
1038 POP_PORT : KPOP_PORT);
|
|
|
1039 #else
|
|
|
1040 addr.sin_port = htons (POP_PORT);
|
|
|
1041 #endif
|
|
|
1042 }
|
|
|
1043 }
|
|
|
1044
|
|
|
1045 #define SOCKET_ERROR "Could not create socket for POP connection: "
|
|
|
1046
|
|
|
1047 sock = socket (PF_INET, SOCK_STREAM, 0);
|
|
|
1048 if (sock < 0)
|
|
|
1049 {
|
|
|
1050 strcpy (pop_error, SOCKET_ERROR);
|
|
|
1051 strncat (pop_error, strerror (errno),
|
|
|
1052 ERROR_MAX - sizeof (SOCKET_ERROR));
|
|
|
1053 return (-1);
|
|
|
1054
|
|
|
1055 }
|
|
|
1056
|
|
|
1057 while (*hostent->h_addr_list)
|
|
|
1058 {
|
|
|
1059 memcpy (&addr.sin_addr, *hostent->h_addr_list, hostent->h_length);
|
|
|
1060 if (! connect (sock, (struct sockaddr *) &addr, sizeof (addr)))
|
|
|
1061 break;
|
|
|
1062 hostent->h_addr_list++;
|
|
|
1063 }
|
|
|
1064
|
|
|
1065 #define CONNECT_ERROR "Could not connect to POP server: "
|
|
|
1066
|
|
|
1067 if (! *hostent->h_addr_list)
|
|
|
1068 {
|
|
|
1069 CLOSESOCKET (sock);
|
|
|
1070 strcpy (pop_error, CONNECT_ERROR);
|
|
|
1071 strncat (pop_error, strerror (errno),
|
|
|
1072 ERROR_MAX - sizeof (CONNECT_ERROR));
|
|
|
1073 return (-1);
|
|
|
1074
|
|
|
1075 }
|
|
|
1076
|
|
|
1077 #ifdef KERBEROS
|
|
|
1078 #define KRB_ERROR "Kerberos error connecting to POP server: "
|
|
|
1079 if (! (flags & POP_NO_KERBEROS))
|
|
|
1080 {
|
|
|
1081 #ifdef KRB5
|
|
|
1082 krb5_init_ets ();
|
|
|
1083
|
|
|
1084 if (rem = krb5_cc_default (&ccdef))
|
|
|
1085 {
|
|
|
1086 krb5error:
|
|
|
1087 strcpy (pop_error, KRB_ERROR);
|
|
|
1088 strncat (pop_error, error_message (rem),
|
|
|
1089 ERROR_MAX - sizeof(KRB_ERROR));
|
|
|
1090 CLOSESOCKET (sock);
|
|
|
1091 return (-1);
|
|
|
1092 }
|
|
|
1093
|
|
|
1094 if (rem = krb5_cc_get_principal (ccdef, &client))
|
|
|
1095 {
|
|
|
1096 goto krb5error;
|
|
|
1097 }
|
|
|
1098
|
|
|
1099 for (cp = hostent->h_name; *cp; cp++)
|
|
|
1100 {
|
|
|
1101 if (isupper (*cp))
|
|
|
1102 {
|
|
|
1103 *cp = tolower (*cp);
|
|
|
1104 }
|
|
|
1105 }
|
|
|
1106
|
|
|
1107 if (rem = krb5_sname_to_principal (hostent->h_name, POP_SERVICE,
|
|
|
1108 FALSE, &server))
|
|
|
1109 {
|
|
|
1110 goto krb5error;
|
|
|
1111 }
|
|
|
1112
|
|
|
1113 rem = krb5_sendauth ((krb5_pointer) &sock, "KPOPV1.0", client, server,
|
|
|
1114 AP_OPTS_MUTUAL_REQUIRED,
|
|
|
1115 0, /* no checksum */
|
|
|
1116 0, /* no creds, use ccache instead */
|
|
|
1117 ccdef,
|
|
|
1118 0, /* don't need seq # */
|
|
|
1119 0, /* don't need subsession key */
|
|
|
1120 &err_ret,
|
|
|
1121 0); /* don't need reply */
|
|
|
1122 krb5_free_principal (server);
|
|
|
1123 if (rem)
|
|
|
1124 {
|
|
|
1125 if (err_ret && err_ret->text.length)
|
|
|
1126 {
|
|
|
1127 strcpy (pop_error, KRB_ERROR);
|
|
|
1128 strncat (pop_error, error_message (rem),
|
|
|
1129 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1130 strncat (pop_error, " [server says '",
|
|
|
1131 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1132 strncat (pop_error, err_ret->text.data,
|
|
|
1133 min (ERROR_MAX - strlen (pop_error) - 1,
|
|
|
1134 err_ret->text.length));
|
|
|
1135 strncat (pop_error, "']",
|
|
|
1136 ERROR_MAX - strlen (pop_error) - 1);
|
|
|
1137 }
|
|
|
1138 else
|
|
|
1139 {
|
|
|
1140 strcpy (pop_error, KRB_ERROR);
|
|
|
1141 strncat (pop_error, error_message (rem),
|
|
|
1142 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1143 }
|
|
|
1144 if (err_ret)
|
|
|
1145 krb5_free_error (err_ret);
|
|
|
1146
|
|
|
1147 CLOSESOCKET (sock);
|
|
|
1148 return (-1);
|
|
|
1149 }
|
|
|
1150 #else /* ! KRB5 */
|
|
|
1151 ticket = (KTEXT) malloc (sizeof (KTEXT_ST));
|
|
|
1152 rem = krb_sendauth (0L, sock, ticket, "pop", hostent->h_name,
|
|
|
1153 (char *) krb_realmofhost (hostent->h_name),
|
|
|
1154 (unsigned long) 0, &msg_data, &cred, schedule,
|
|
|
1155 (struct sockaddr_in *) 0,
|
|
|
1156 (struct sockaddr_in *) 0,
|
|
|
1157 "KPOPV0.1");
|
|
|
1158 free ((char *) ticket);
|
|
|
1159 if (rem != KSUCCESS)
|
|
|
1160 {
|
|
|
1161 strcpy (pop_error, KRB_ERROR);
|
|
|
1162 strncat (pop_error, krb_err_txt[rem],
|
|
|
1163 ERROR_MAX - sizeof (KRB_ERROR));
|
|
|
1164 CLOSESOCKET (sock);
|
|
|
1165 return (-1);
|
|
|
1166 }
|
|
|
1167 #endif /* KRB5 */
|
|
|
1168 }
|
|
|
1169 #endif /* KERBEROS */
|
|
|
1170
|
|
|
1171 return (sock);
|
|
|
1172 } /* socket_connection */
|
|
|
1173
|
|
|
1174 /*
|
|
|
1175 * Function: pop_getline
|
|
|
1176 *
|
|
|
1177 * Purpose: Get a line of text from the connection and return a
|
|
|
1178 * pointer to it. The carriage return and linefeed at the end of
|
|
|
1179 * the line are stripped, but periods at the beginnings of lines
|
|
|
1180 * are NOT dealt with in any special way.
|
|
|
1181 *
|
|
|
1182 * Arguments:
|
|
|
1183 * server The server from which to get the line of text.
|
|
|
1184 *
|
|
|
1185 * Returns: A non-null pointer if successful, or a null pointer on any
|
|
|
1186 * error, with an error message copied into pop_error.
|
|
|
1187 *
|
|
|
1188 * Notes: The line returned is overwritten with each call to pop_getline.
|
|
|
1189 *
|
|
|
1190 * Side effects: Closes the connection on error.
|
|
|
1191 */
|
|
|
1192 static char *
|
|
|
1193 pop_getline (popserver server)
|
|
|
1194 {
|
|
|
1195 #define GETLINE_ERROR "Error reading from server: "
|
|
|
1196
|
|
|
1197 int ret;
|
|
|
1198 int search_offset = 0;
|
|
|
1199
|
|
|
1200 if (server->data)
|
|
|
1201 {
|
|
|
1202 char *cp = find_crlf (server->buffer + server->buffer_index);
|
|
|
1203 if (cp)
|
|
|
1204 {
|
|
|
1205 int found;
|
|
|
1206 int data_used;
|
|
|
1207
|
|
|
1208 found = server->buffer_index;
|
|
|
1209 data_used = (cp + 2) - server->buffer - found;
|
|
|
1210
|
|
|
1211 *cp = '\0'; /* terminate the string to be returned */
|
|
|
1212 server->data -= data_used;
|
|
|
1213 server->buffer_index += data_used;
|
|
|
1214
|
|
|
1215 if (pop_debug)
|
|
|
1216 fprintf (stderr, "<<< %s\n", server->buffer + found);
|
|
|
1217 return (server->buffer + found);
|
|
|
1218 }
|
|
|
1219 else
|
|
|
1220 {
|
|
|
1221 memcpy (server->buffer,
|
|
|
1222 server->buffer + server->buffer_index,
|
|
|
1223 server->data);
|
|
|
1224 /* Record the fact that we've searched the data already in
|
|
|
1225 the buffer for a CRLF, so that when we search below, we
|
|
|
1226 don't have to search the same data twice. There's a "-
|
|
|
1227 1" here to account for the fact that the last character
|
|
|
1228 of the data we have may be the CR of a CRLF pair, of
|
|
|
1229 which we haven't read the second half yet, so we may have
|
|
|
1230 to search it again when we read more data. */
|
|
|
1231 search_offset = server->data - 1;
|
|
|
1232 server->buffer_index = 0;
|
|
|
1233 }
|
|
|
1234 }
|
|
|
1235 else
|
|
|
1236 {
|
|
|
1237 server->buffer_index = 0;
|
|
|
1238 }
|
|
|
1239
|
|
|
1240 while (1)
|
|
|
1241 {
|
|
|
1242 /* There's a "- 1" here to leave room for the null that we put
|
|
|
1243 at the end of the read data below. We put the null there so
|
|
|
1244 that find_crlf knows where to stop when we call it. */
|
|
|
1245 if (server->data == server->buffer_size - 1)
|
|
|
1246 {
|
|
|
1247 server->buffer_size += GETLINE_INCR;
|
|
|
1248 server->buffer = (char *)realloc (server->buffer, server->buffer_size);
|
|
|
1249 if (! server->buffer)
|
|
|
1250 {
|
|
|
1251 strcpy (pop_error, "Out of memory in pop_getline");
|
|
|
1252 pop_trash (server);
|
|
|
1253 return (0);
|
|
|
1254 }
|
|
|
1255 }
|
|
|
1256 ret = RECV (server->file, server->buffer + server->data,
|
|
|
1257 server->buffer_size - server->data - 1, 0);
|
|
|
1258 if (ret < 0)
|
|
|
1259 {
|
|
|
1260 strcpy (pop_error, GETLINE_ERROR);
|
|
|
1261 strncat (pop_error, strerror (errno),
|
|
|
1262 ERROR_MAX - sizeof (GETLINE_ERROR));
|
|
|
1263 pop_trash (server);
|
|
|
1264 return (0);
|
|
|
1265 }
|
|
|
1266 else if (ret == 0)
|
|
|
1267 {
|
|
|
1268 strcpy (pop_error, "Unexpected EOF from server in pop_getline");
|
|
|
1269 pop_trash (server);
|
|
|
1270 return (0);
|
|
|
1271 }
|
|
|
1272 else
|
|
|
1273 {
|
|
|
1274 char *cp;
|
|
|
1275 server->data += ret;
|
|
|
1276 server->buffer[server->data] = '\0';
|
|
|
1277
|
|
|
1278 cp = find_crlf (server->buffer + search_offset);
|
|
|
1279 if (cp)
|
|
|
1280 {
|
|
|
1281 int data_used = (cp + 2) - server->buffer;
|
|
|
1282 *cp = '\0';
|
|
|
1283 server->data -= data_used;
|
|
|
1284 server->buffer_index = data_used;
|
|
|
1285
|
|
|
1286 if (pop_debug)
|
|
|
1287 fprintf (stderr, "<<< %s\n", server->buffer);
|
|
|
1288 return (server->buffer);
|
|
|
1289 }
|
|
|
1290 search_offset += ret;
|
|
|
1291 }
|
|
|
1292 }
|
|
|
1293
|
|
|
1294 /* NOTREACHED */
|
|
|
1295 }
|
|
|
1296
|
|
|
1297 /*
|
|
|
1298 * Function: sendline
|
|
|
1299 *
|
|
|
1300 * Purpose: Sends a line of text to the POP server. The line of text
|
|
|
1301 * passed into this function should NOT have the carriage return
|
|
|
1302 * and linefeed on the end of it. Periods at beginnings of lines
|
|
|
1303 * will NOT be treated specially by this function.
|
|
|
1304 *
|
|
|
1305 * Arguments:
|
|
|
1306 * server The server to which to send the text.
|
|
|
1307 * line The line of text to send.
|
|
|
1308 *
|
|
|
1309 * Return value: Upon successful completion, a value of 0 will be
|
|
|
1310 * returned. Otherwise, a non-zero value will be returned, and
|
|
|
1311 * an error will be copied into pop_error.
|
|
|
1312 *
|
|
|
1313 * Side effects: Closes the connection on error.
|
|
|
1314 */
|
|
|
1315 static int
|
|
|
1316 sendline (popserver server, char *line)
|
|
|
1317 {
|
|
|
1318 #define SENDLINE_ERROR "Error writing to POP server: "
|
|
|
1319 int ret;
|
|
|
1320
|
|
|
1321 ret = fullwrite (server->file, line, strlen (line));
|
|
|
1322 if (ret >= 0)
|
|
|
1323 { /* 0 indicates that a blank line was written */
|
|
|
1324 ret = fullwrite (server->file, "\r\n", 2);
|
|
|
1325 }
|
|
|
1326
|
|
|
1327 if (ret < 0)
|
|
|
1328 {
|
|
|
1329 pop_trash (server);
|
|
|
1330 strcpy (pop_error, SENDLINE_ERROR);
|
|
|
1331 strncat (pop_error, strerror (errno),
|
|
|
1332 ERROR_MAX - sizeof (SENDLINE_ERROR));
|
|
|
1333 return (ret);
|
|
|
1334 }
|
|
|
1335
|
|
|
1336 if (pop_debug)
|
|
|
1337 fprintf (stderr, ">>> %s\n", line);
|
|
|
1338
|
|
|
1339 return (0);
|
|
|
1340 }
|
|
|
1341
|
|
|
1342 /*
|
|
|
1343 * Procedure: fullwrite
|
|
|
1344 *
|
|
|
1345 * Purpose: Just like write, but keeps trying until the entire string
|
|
|
1346 * has been written.
|
|
|
1347 *
|
|
|
1348 * Return value: Same as write. Pop_error is not set.
|
|
|
1349 */
|
|
|
1350 static int
|
|
|
1351 fullwrite (int fd, char *buf, int nbytes)
|
|
|
1352 {
|
|
|
1353 char *cp;
|
|
|
1354 int ret;
|
|
|
1355
|
|
|
1356 cp = buf;
|
|
|
1357 while ((ret = SEND (fd, cp, nbytes, 0)) > 0)
|
|
|
1358 {
|
|
|
1359 cp += ret;
|
|
|
1360 nbytes -= ret;
|
|
|
1361 }
|
|
|
1362
|
|
|
1363 return (ret);
|
|
|
1364 }
|
|
|
1365
|
|
|
1366 /*
|
|
|
1367 * Procedure getok
|
|
|
1368 *
|
|
|
1369 * Purpose: Reads a line from the server. If the return indicator is
|
|
|
1370 * positive, return with a zero exit status. If not, return with
|
|
|
1371 * a negative exit status.
|
|
|
1372 *
|
|
|
1373 * Arguments:
|
|
|
1374 * server The server to read from.
|
|
|
1375 *
|
|
|
1376 * Returns: 0 for success, else for failure and puts error in pop_error.
|
|
|
1377 *
|
|
|
1378 * Side effects: On failure, may make the connection unusable.
|
|
|
1379 */
|
|
|
1380 static int
|
|
|
1381 getok (popserver server)
|
|
|
1382 {
|
|
|
1383 char *fromline;
|
|
|
1384
|
|
|
1385 if (! (fromline = pop_getline (server)))
|
|
|
1386 {
|
|
|
1387 return (-1);
|
|
|
1388 }
|
|
|
1389
|
|
|
1390 if (! strncmp (fromline, "+OK", 3))
|
|
|
1391 return (0);
|
|
|
1392 else if (! strncmp (fromline, "-ERR", 4))
|
|
|
1393 {
|
|
|
1394 strncpy (pop_error, fromline, ERROR_MAX);
|
|
|
1395 pop_error[ERROR_MAX-1] = '\0';
|
|
|
1396 return (-1);
|
|
|
1397 }
|
|
|
1398 else
|
|
|
1399 {
|
|
|
1400 strcpy (pop_error,
|
|
|
1401 "Unexpected response from server; expecting +OK or -ERR");
|
|
|
1402 pop_trash (server);
|
|
|
1403 return (-1);
|
|
|
1404 }
|
|
|
1405 }
|
|
|
1406
|
|
|
1407 #if 0
|
|
|
1408 /*
|
|
|
1409 * Function: gettermination
|
|
|
1410 *
|
|
|
1411 * Purpose: Gets the next line and verifies that it is a termination
|
|
|
1412 * line (nothing but a dot).
|
|
|
1413 *
|
|
|
1414 * Return value: 0 on success, non-zero with pop_error set on error.
|
|
|
1415 *
|
|
|
1416 * Side effects: Closes the connection on error.
|
|
|
1417 */
|
|
|
1418 static int
|
|
|
1419 gettermination (popserver server)
|
|
|
1420 {
|
|
|
1421 char *fromserver;
|
|
|
1422
|
|
|
1423 fromserver = pop_getline (server);
|
|
|
1424 if (! fromserver)
|
|
|
1425 return (-1);
|
|
|
1426
|
|
|
1427 if (strcmp (fromserver, "."))
|
|
|
1428 {
|
|
|
1429 strcpy (pop_error,
|
|
|
1430 "Unexpected response from server in gettermination");
|
|
|
1431 pop_trash (server);
|
|
|
1432 return (-1);
|
|
|
1433 }
|
|
|
1434
|
|
|
1435 return (0);
|
|
|
1436 }
|
|
|
1437 #endif
|
|
|
1438
|
|
|
1439 /*
|
|
|
1440 * Function pop_close
|
|
|
1441 *
|
|
|
1442 * Purpose: Close a pop connection, sending a "RSET" command to try to
|
|
|
1443 * preserve any changes that were made and a "QUIT" command to
|
|
|
1444 * try to get the server to quit, but ignoring any responses that
|
|
|
1445 * are received.
|
|
|
1446 *
|
|
|
1447 * Side effects: The server is unusable after this function returns.
|
|
|
1448 * Changes made to the maildrop since the session was started (or
|
|
|
1449 * since the last pop_reset) may be lost.
|
|
|
1450 */
|
|
|
1451 void
|
|
|
1452 pop_close (popserver server)
|
|
|
1453 {
|
|
|
1454 pop_trash (server);
|
|
|
1455 free ((char *) server);
|
|
|
1456
|
|
|
1457 return;
|
|
|
1458 }
|
|
|
1459
|
|
|
1460 /*
|
|
|
1461 * Function: pop_trash
|
|
|
1462 *
|
|
|
1463 * Purpose: Like pop_close or pop_quit, but doesn't deallocate the
|
|
|
1464 * memory associated with the server. It is legal to call
|
|
|
1465 * pop_close or pop_quit after this function has been called.
|
|
|
1466 */
|
|
|
1467 static void
|
|
|
1468 pop_trash (popserver server)
|
|
|
1469 {
|
|
|
1470 if (server->file >= 0)
|
|
|
1471 {
|
|
|
1472 /* avoid recursion; sendline can call pop_trash */
|
|
|
1473 if (server->trash_started)
|
|
|
1474 return;
|
|
|
1475 server->trash_started = 1;
|
|
|
1476
|
|
|
1477 sendline (server, "RSET");
|
|
|
1478 sendline (server, "QUIT");
|
|
|
1479
|
|
|
1480 CLOSESOCKET (server->file);
|
|
|
1481 server->file = -1;
|
|
|
1482 if (server->buffer)
|
|
|
1483 {
|
|
|
1484 free (server->buffer);
|
|
|
1485 server->buffer = 0;
|
|
|
1486 }
|
|
|
1487 }
|
|
|
1488
|
|
442
|
1489 #ifdef WIN32_NATIVE
|
|
428
|
1490 if (have_winsock)
|
|
|
1491 WSACleanup ();
|
|
|
1492 #endif
|
|
|
1493 }
|
|
|
1494
|
|
|
1495 /* Return a pointer to the first CRLF in IN_STRING,
|
|
|
1496 or 0 if it does not contain one. */
|
|
|
1497
|
|
|
1498 static char *
|
|
|
1499 find_crlf (char *in_string)
|
|
|
1500 {
|
|
|
1501 while (1)
|
|
|
1502 {
|
|
|
1503 if (! *in_string)
|
|
|
1504 return (0);
|
|
|
1505 else if (*in_string == '\r')
|
|
|
1506 {
|
|
|
1507 if (*++in_string == '\n')
|
|
|
1508 return (in_string - 1);
|
|
|
1509 }
|
|
|
1510 else
|
|
|
1511 in_string++;
|
|
|
1512 }
|
|
|
1513 /* NOTREACHED */
|
|
|
1514 }
|
|
|
1515
|
|
|
1516 #endif /* MAIL_USE_POP */
|
