summaryrefslogtreecommitdiff
path: root/pop3d/pop3d.h
blob: b7e593b9e5e1f161a54a9a7180d7e453305d9048 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008,
   2009, 2010 Free Software Foundation, Inc.

   GNU Mailutils is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   GNU Mailutils is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GNU Mailutils; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301 USA */

#ifndef _POP3D_H
#define _POP3D_H	1

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <mailutils/types.h>
#include <mailutils/stream.h>
#include <mu_dbm.h>
#include <mu_asprintf.h>
#include <mu_umaxtostr.h>
#include <muaux.h>

/* The implementation */
#define	IMPL		"GNU POP3 Daemon"

/* APOP password file, without .db or .passwd, which are added based on file
   type automatically */
#define APOP_PASSFILE_NAME "apop"

#ifdef USE_DBM
# define APOP_PASSFILE SYSCONFDIR "/" APOP_PASSFILE_NAME
# define ENABLE_LOGIN_DELAY
#else
# define APOP_PASSFILE SYSCONFDIR "/" APOP_PASSFILE_NAME ".passwd"
# undef ENABLE_LOGIN_DELAY
#endif

#ifdef ENABLE_LOGIN_DELAY
# define LOGIN_STAT_FILE "/var/run/pop3-login"
extern time_t login_delay;
extern char *login_stat_file;
extern int check_login_delay (char *username);
extern void update_login_delay (char *username);
extern void login_delay_capa (void);
#else
# define check_login_delay(u) 0
# define update_login_delay(u)
# define login_delay_capa()
#endif

/* Minimum advertise retention time for messages.  */
extern unsigned expire;
extern int expire_on_exit;

#define EXPIRE_NEVER ((unsigned)-1)

/* Size of the MD5 digest for APOP */
#define APOP_DIGEST	70

/* Longest legal POP command */
#define POP_MAXCMDLEN	255

/* Buffer size to use for output */
#define BUFFERSIZE	1024

#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#define _QNX_SOURCE
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <sys/file.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <pwd.h>
#include <grp.h>
#include <syslog.h>
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <sysexits.h>

#include <mailutils/alloc.h>
#include <mailutils/cctype.h>
#include <mailutils/cstr.h>
#include <mailutils/attribute.h>
#include <mailutils/body.h>
#include <mailutils/daemon.h>
#include <mailutils/errno.h>
#include <mailutils/error.h>
#include <mailutils/header.h>
#include <mailutils/list.h>
#include <mailutils/locker.h>
#include <mailutils/mailbox.h>
#include <mailutils/message.h>
#include <mailutils/mutil.h>
#include <mailutils/mu_auth.h>
#include <mailutils/nls.h>
#include <mailutils/registrar.h>
#include <mailutils/tls.h>
#include <mailutils/url.h>
#include <mailutils/md5.h>
#include <mailutils/acl.h>
#include <mailutils/server.h>
#include <mailutils/filter.h>

/* For Berkley DB2 APOP password file */
#ifdef HAVE_DB_H
#include <db.h>
#endif

#ifdef HAVE_SECURITY_PAM_APPL_H
#include <security/pam_appl.h>
#endif

#ifdef HAVE_SHADOW_H
#include <shadow.h>
#endif

#ifndef MAXHOSTNAMELEN
/* Maximum length of a hostname (is this defined somewhere else?).  */
/* MAXHOSTNAMELEN is already defined on Solaris.  */
# define MAXHOSTNAMELEN	64
#endif

#define POP3_ATTRIBUTE_DELE 0x0001
#define POP3_ATTRIBUTE_RETR 0x0010

#define INITIAL         -1
#define AUTHORIZATION	0
#define TRANSACTION	1
#define UPDATE		2
#define ABORT           3

#define OK		0
#define ERR_WRONG_STATE	1
#define ERR_BAD_ARGS	2
#define ERR_BAD_LOGIN	3
#define ERR_NO_MESG	4
#define ERR_MESG_DELE   5
#define ERR_NOT_IMPL	6
#define ERR_BAD_CMD	7
#define ERR_MBOX_LOCK	8
#define ERR_TOO_LONG	9
#define ERR_NO_MEM	10
#define ERR_SIGNAL	11
#define ERR_FILE        12
#define ERR_NO_IFILE    13
#define ERR_NO_OFILE    14
#define ERR_IO          15
#define ERR_PROTO       16
#define ERR_TIMEOUT	17
#define ERR_UNKNOWN	18
#define ERR_MBOX_SYNC   19
#define ERR_TLS_ACTIVE  20
#define ERR_TLS_IO      21
#define ERR_LOGIN_DELAY 22
#define ERR_TERMINATE   23

typedef struct mu_pop_server *mu_pop_server_t;
typedef int (*pop3d_command_handler_t) (char *);

struct pop3d_command
{
  const char *name;
  pop3d_command_handler_t handler;
};

extern mu_stream_t istream, ostream;
extern mu_pop_server_t pop3srv;
extern mu_mailbox_t mbox;
extern int state;
extern int initial_state;
extern char *username;
extern char *maildir;
extern char *md5shared;
extern size_t children;
extern struct daemon_param daemon_param;
extern int debug_mode;
#ifdef WITH_TLS
extern int tls_available;
extern int tls_done;
#endif /* WITH_TLS */
extern int undelete_on_startup;
extern struct mu_auth_data *auth_data;
extern unsigned int idle_timeout;
extern int pop3d_transcript;

extern pop3d_command_handler_t pop3d_find_command (const char *name);

extern int pop3d_stat           (char *);
extern int pop3d_top            (char *);
extern int pop3d_uidl           (char *);
extern int pop3d_user           (char *);
extern int pop3d_apop           (char *);
extern int pop3d_auth           (char *);
extern int pop3d_capa           (char *);
extern int pop3d_dele           (char *);
extern int pop3d_list           (char *);
extern int pop3d_noop           (char *);
extern int pop3d_quit           (char *);
extern int pop3d_retr           (char *);
extern int pop3d_rset           (char *);

extern void pop3d_bye           (void);
extern int pop3d_abquit         (int);
extern char *pop3d_apopuser     (const char *);
extern int pop3d_lock           (void);
extern void process_cleanup     (void);

extern void pop3d_parse_command (char *cmd, char **pcmd, char **parg);

extern RETSIGTYPE pop3d_master_signal  (int);
extern RETSIGTYPE pop3d_child_signal  (int);

#ifdef WITH_TLS
extern int pop3d_stls           (char *);
extern void enable_stls (void);
#endif /* WITH_TLS */
extern int pop3d_touchlock      (void);
extern int pop3d_unlock         (void);
extern void pop3d_outf          (const char *fmt, ...) MU_PRINTFLIKE(1,2);

extern void pop3d_setio         (FILE *in, FILE *out);
extern char *pop3d_readline     (char *, size_t);
extern void pop3d_flush_output  (void);

extern int pop3d_is_master      (void);

extern void pop3d_mark_deleted (mu_attribute_t attr);
extern int pop3d_is_deleted (mu_attribute_t attr);
extern void pop3d_unset_deleted (mu_attribute_t attr);
void pop3d_undelete_all (void);

#ifdef WITH_TLS
extern int pop3d_init_tls_server    (void);
extern void pop3d_deinit_tls_server (void);
#endif /* WITH_TLS */

extern void pop3d_mark_retr (mu_attribute_t attr);
extern int pop3d_is_retr (mu_attribute_t attr);
extern void pop3d_unmark_retr (mu_attribute_t attr);

extern void expire_mark_message (mu_message_t msg, char **value);

extern void deliver_pending_bulletins (void);
extern void set_bulletin_db (const char *file);
extern int set_bulletin_source (const char *source);
extern int pop3d_begin_session (void);
extern const char *pop3d_error_string (int code);

#endif /* _POP3D_H */

Return to:

Send suggestions and report system problems to the System administrator.