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
|
/* Interface name and statistics get function using proc file system
* Copyright (C) 1999 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra 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, or (at your option) any
* later version.
*
* GNU Zebra 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 Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
/* This is compiled and linked if found to be required at "configure" time.
*
* HAVE_PROC_NET_DEV => /proc/net/dev exists
* HAVE_PROC_NET_IF_INET6 => /proc/net/if_inet6 exists
*
* One or both of this will be the case if this is being compiled.
*
* Appears NOT to be used if netlink is available.
*/
#include <zebra.h>
#include "if.h"
#include "prefix.h"
#include "log.h"
#include "zebra/ioctl.h"
#include "zebra/connected.h"
#include "zebra/interface.h"
/* zebra/interface.h declares the extern functions for if_proc.c
*
* The following are not declared if HAVE_PROC_NET_DEV is not defined.
* So declare them here if required, in order to suppress warnings.
*/
#ifndef HAVE_PROC_NET_DEV
extern void ifstat_update_proc (void);
extern int interface_list_proc (void);
#endif
/* Proc filesystem one line buffer. */
#define PROCBUFSIZ 1024
/* Path to device proc file system. */
#ifndef _PATH_PROC_NET_DEV
#define _PATH_PROC_NET_DEV "/proc/net/dev"
#endif /* _PATH_PROC_NET_DEV */
/* Return statistics data pointer. */
static char *
interface_name_cut (char *buf, char **name)
{
char *stat;
/* Skip white space. Line will include header spaces. */
while (*buf == ' ')
buf++;
*name = buf;
/* Cut interface name. */
stat = strrchr (buf, ':');
*stat++ = '\0';
return stat;
}
/* Fetch each statistics field. */
static int
ifstat_dev_fields (int version, char *buf, struct interface *ifp)
{
switch (version)
{
case 3:
sscanf(buf,
"%ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld",
&ifp->stats.rx_bytes,
&ifp->stats.rx_packets,
&ifp->stats.rx_errors,
&ifp->stats.rx_dropped,
&ifp->stats.rx_fifo_errors,
&ifp->stats.rx_frame_errors,
&ifp->stats.rx_compressed,
&ifp->stats.rx_multicast,
&ifp->stats.tx_bytes,
&ifp->stats.tx_packets,
&ifp->stats.tx_errors,
&ifp->stats.tx_dropped,
&ifp->stats.tx_fifo_errors,
&ifp->stats.collisions,
&ifp->stats.tx_carrier_errors,
&ifp->stats.tx_compressed);
break;
case 2:
sscanf(buf, "%ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld",
&ifp->stats.rx_bytes,
&ifp->stats.rx_packets,
&ifp->stats.rx_errors,
&ifp->stats.rx_dropped,
&ifp->stats.rx_fifo_errors,
&ifp->stats.rx_frame_errors,
&ifp->stats.tx_bytes,
&ifp->stats.tx_packets,
&ifp->stats.tx_errors,
&ifp->stats.tx_dropped,
&ifp->stats.tx_fifo_errors,
&ifp->stats.collisions,
&ifp->stats.tx_carrier_errors);
ifp->stats.rx_multicast = 0;
break;
case 1:
sscanf(buf, "%ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld",
&ifp->stats.rx_packets,
&ifp->stats.rx_errors,
&ifp->stats.rx_dropped,
&ifp->stats.rx_fifo_errors,
&ifp->stats.rx_frame_errors,
&ifp->stats.tx_packets,
&ifp->stats.tx_errors,
&ifp->stats.tx_dropped,
&ifp->stats.tx_fifo_errors,
&ifp->stats.collisions,
&ifp->stats.tx_carrier_errors);
ifp->stats.rx_bytes = 0;
ifp->stats.tx_bytes = 0;
ifp->stats.rx_multicast = 0;
break;
}
return 0;
}
/* Update interface's statistics. */
extern void
ifstat_update_proc (void) /* declared in interface.h */
{
FILE *fp;
char buf[PROCBUFSIZ];
int version;
struct interface *ifp;
char *stat;
char *name;
/* Open /proc/net/dev. */
fp = fopen (_PATH_PROC_NET_DEV, "r");
if (fp == NULL)
{
zlog_warn ("Can't open proc file %s: %s",
_PATH_PROC_NET_DEV, safe_strerror (errno));
return;
}
/* Drop header lines. */
fgets (buf, PROCBUFSIZ, fp);
fgets (buf, PROCBUFSIZ, fp);
/* To detect proc format veresion, parse second line. */
if (strstr (buf, "compressed"))
version = 3;
else if (strstr (buf, "bytes"))
version = 2;
else
version = 1;
/* Update each interface's statistics. */
while (fgets (buf, PROCBUFSIZ, fp) != NULL)
{
stat = interface_name_cut (buf, &name);
ifp = if_get_by_name (name);
ifstat_dev_fields (version, stat, ifp);
}
fclose(fp);
return;
}
/* Interface structure allocation by proc filesystem. */
extern int
interface_list_proc () /* declared in interface.h */
{
FILE *fp;
char buf[PROCBUFSIZ];
struct interface *ifp;
char *name;
/* Open /proc/net/dev. */
fp = fopen (_PATH_PROC_NET_DEV, "r");
if (fp == NULL)
{
zlog_warn ("Can't open proc file %s: %s",
_PATH_PROC_NET_DEV, safe_strerror (errno));
return -1;
}
/* Drop header lines. */
fgets (buf, PROCBUFSIZ, fp);
fgets (buf, PROCBUFSIZ, fp);
/* Only allocate interface structure. Other jobs will be done in
if_ioctl.c. */
while (fgets (buf, PROCBUFSIZ, fp) != NULL)
{
interface_name_cut (buf, &name);
ifp = if_get_by_name (name);
if_add_update (ifp);
}
fclose(fp);
return 0;
}
#if defined(HAVE_IPV6) && defined(HAVE_PROC_NET_IF_INET6)
#ifndef _PATH_PROC_NET_IF_INET6
#define _PATH_PROC_NET_IF_INET6 "/proc/net/if_inet6"
#endif /* _PATH_PROC_NET_IF_INET6 */
extern int
ifaddr_proc_ipv6 () /* declared in interface.h */
{
FILE *fp;
char buf[PROCBUFSIZ];
int n;
char addr[33];
char ifname[21];
int ifindex, plen, scope, status;
struct interface *ifp;
struct prefix_ipv6 p;
/* Open proc file system. */
fp = fopen (_PATH_PROC_NET_IF_INET6, "r");
if (fp == NULL)
{
zlog_warn ("Can't open proc file %s: %s",
_PATH_PROC_NET_IF_INET6, safe_strerror (errno));
return -1;
}
/* Get interface's IPv6 address. */
while (fgets (buf, PROCBUFSIZ, fp) != NULL)
{
n = sscanf (buf, "%32s %02x %02x %02x %02x %20s",
addr, &ifindex, &plen, &scope, &status, ifname);
if (n != 6)
continue;
ifp = if_get_by_name (ifname);
/* Fetch interface's IPv6 address. */
str2in6_addr (addr, &p.prefix);
p.prefixlen = plen;
connected_add_ipv6 (ifp, 0, &p.prefix, p.prefixlen, NULL, ifname);
}
fclose (fp);
return 0;
}
#endif /* HAVE_IPV6 && HAVE_PROC_NET_IF_INET6 */
|
