logindelay.c
3.2 KB
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
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2003, 2007, 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 */
#include "pop3d.h"
#ifdef ENABLE_LOGIN_DELAY
static int
open_stat_db (DBM_FILE *db, int mode)
{
int rc = mu_dbm_open (login_stat_file, db, mode, 0660);
if (rc)
{
if (rc == -1)
mu_diag_output (MU_DIAG_INFO, _("bad permissions on statistics db"));
else
mu_diag_output (MU_DIAG_ERROR, _("unable to open statistics db: %s"),
mu_strerror (rc));
}
return rc;
}
int
check_login_delay (char *username)
{
time_t now, prev_time;
DBM_FILE db;
DBM_DATUM key, data;
char text[64], *p;
int rc;
if (login_delay == 0)
return 0;
time (&now);
if (open_stat_db (&db, MU_STREAM_RDWR))
return 0;
memset (&key, 0, sizeof key);
MU_DATUM_PTR(key) = username;
MU_DATUM_SIZE(key) = strlen (username);
memset (&data, 0, sizeof data);
rc = mu_dbm_fetch (db, key, &data);
if (rc)
{
mu_diag_output (MU_DIAG_ERROR, _("cannot fetch login delay data: %s"),
mu_strerror (rc));
mu_dbm_close (db);
return 0;
}
if (MU_DATUM_SIZE(data) > sizeof (text) - 1)
{
mu_diag_output (MU_DIAG_ERROR,
_("invalid entry for '%s': wrong timestamp size"),
username);
mu_dbm_close (db);
return 0;
}
memcpy (text, MU_DATUM_PTR(data), MU_DATUM_SIZE(data));
text[MU_DATUM_SIZE(data)] = 0;
mu_dbm_close (db);
prev_time = strtoul (text, &p, 0);
if (*p)
{
mu_diag_output (MU_DIAG_ERROR,
_("malformed timestamp for '%s': %s"),
username, text);
return 0;
}
return now - prev_time < login_delay;
}
void
update_login_delay (char *username)
{
time_t now;
DBM_FILE db;
DBM_DATUM key, data;
char text[64];
if (login_delay == 0 || username == NULL)
return;
time (&now);
if (open_stat_db (&db, MU_STREAM_RDWR))
return;
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
MU_DATUM_PTR(key) = username;
MU_DATUM_SIZE(key) = strlen (username);
snprintf (text, sizeof text, "%lu", (unsigned long) now);
MU_DATUM_PTR(data) = text;
MU_DATUM_SIZE(data) = strlen (text);
if (mu_dbm_insert (db, key, data, 1))
mu_error (_("%s: cannot store datum %s/%s"),
login_stat_file, username, text);
mu_dbm_close (db);
}
void
login_delay_capa ()
{
DBM_FILE db;
if (login_delay && open_stat_db (&db, MU_STREAM_RDWR) == 0)
{
pop3d_outf ("LOGIN-DELAY %s\n", mu_umaxtostr (0, login_delay));
mu_dbm_close (db);
}
}
#endif