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
|
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, October 1998.
LibGTop 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 2 of the License,
or (at your option) any later version.
LibGTop 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 LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/ppp.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <glib.h>
#ifdef HAVE_ISDN_H
#include <linux/isdn.h>
#else
#define ISDN_MAX_CHANNELS 64
#define IIOCGETCPS _IO('I',21)
#endif /* HAVE_ISDN_H */
static const unsigned long _glibtop_sysdeps_ppp =
(1L << GLIBTOP_PPP_STATE) + (1L << GLIBTOP_PPP_BYTES_IN) +
(1L << GLIBTOP_PPP_BYTES_OUT);
/* Init function. */
void
_glibtop_init_ppp_s (glibtop *server)
{
server->sysdeps.ppp = _glibtop_sysdeps_ppp;
}
static gboolean
get_ISDN_stats (glibtop *server, int *in, int *out)
{
unsigned long isdn_stats[2 * ISDN_MAX_CHANNELS], *ptr;
int fd;
*in = *out = 0;
fd = open ("/dev/isdninfo", O_RDONLY);
if (fd < 0) {
return FALSE;
}
if ((ioctl (fd, IIOCGETCPS, isdn_stats) < 0) && (errno != 0)) {
close(fd);
return FALSE;
}
for (ptr = isdn_stats;
ptr != (isdn_stats + G_N_ELEMENTS(isdn_stats));
/* NOOP */) {
*in += *ptr++; *out += *ptr++;
}
close (fd);
return TRUE;
}
static gboolean is_ISDN_on (glibtop *server, int *online)
{
FILE *f = NULL;
char buffer [BUFSIZ], *p;
int i;
/* Perhaps I should try to explain this code a little bit.
*
* ------------------------------------------------------------
* This is from the manpage of isdninfo(4):
*
* DESCRIPTION
* /dev/isdninfo is a character device with major number 45
* and minor number 255. It delivers status information from
* the Linux ISDN subsystem to user level.
*
* DATA FORMAT
* When reading from this device, the current status of the
* Linux ISDN subsystem is delivered in 6 lines of text. Each
* line starts with a tag string followed by a colon and
* whitespace. After that the status values are appended sep-
* arated by whitespace.
*
* flags is the tag of line 5. In this line for every driver
* slot, it's B-Channel status is shown. If no driver
* is registered in a slot, a ? is shown. For every
* established B-Channel of the driver, a bit is set
* in the shown value. The driver's first channel is
* mapped to bit 0, the second channel to bit 1 and so
* on.
* ------------------------------------------------------------
*
* So we open /dev/isdninfo, discard the first four lines of text
* and then check whether we have something that is not `0' or `?'
* in one of the flags fields.
*
* Sounds complicated, but I don't see any other way to check whether
* we are connected. Also, this is the method some other ISDN tools
* for Linux use.
*
* Martin
*/
f = fopen ("/dev/isdninfo", "r");
if (!f) return FALSE;
for (i = 0; i < 5; i++) {
if (fgets (buffer, BUFSIZ, f) == NULL) {
fclose (f);
return FALSE;
}
}
if (strncmp (buffer, "flags:", 6)) {
fclose (f);
return FALSE;
}
p = buffer+6;
while (*p) {
char *end = p;
if (isspace (*p)) {
p++;
continue;
}
for (end = p; *end && !isspace (*end); end++)
;
if (*end == 0)
break;
else
*end = 0;
if (!strcmp (p, "?") || !strcmp (p, "0")) {
p = end+1;
continue;
}
fclose (f);
*online = TRUE;
return TRUE;
}
fclose (f);
*online = FALSE;
return TRUE;
}
/* Provides PPP/ISDN information. */
void
glibtop_get_ppp_s (glibtop *server, glibtop_ppp *buf, unsigned short device)
{
int in, out, online;
memset (buf, 0, sizeof (glibtop_ppp));
if (is_ISDN_on (server, &online)) {
buf->state = online ? GLIBTOP_PPP_STATE_ONLINE :
GLIBTOP_PPP_STATE_HANGUP;
buf->flags |= (1L << GLIBTOP_PPP_STATE);
}
if (get_ISDN_stats (server, &in, &out)) {
buf->bytes_in = in;
buf->bytes_out = out;
buf->flags |= (1L << GLIBTOP_PPP_BYTES_IN) |
(1L << GLIBTOP_PPP_BYTES_OUT);
}
}
|
