1 /**
2 * collectd - src/conntrack.c
3 * Copyright (C) 2009 Tomasz Pala
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Tomasz Pala <gotar at pld-linux.org>
20 * based on entropy.c by:
21 * Florian octo Forster <octo at verplant.org>
22 **/
24 #include "collectd.h"
25 #include "common.h"
26 #include "plugin.h"
28 #if !KERNEL_LINUX
29 # error "No applicable input method."
30 #endif
32 #define CONNTRACK_FILE "/proc/sys/net/netfilter/nf_conntrack_count"
34 static void conntrack_submit (double conntrack)
35 {
36 value_t values[1];
37 value_list_t vl = VALUE_LIST_INIT;
39 values[0].gauge = conntrack;
41 vl.values = values;
42 vl.values_len = 1;
43 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
44 sstrncpy (vl.plugin, "conntrack", sizeof (vl.plugin));
45 sstrncpy (vl.type, "conntrack", sizeof (vl.type));
47 plugin_dispatch_values (&vl);
48 } /* static void conntrack_submit */
50 static int conntrack_read (void)
51 {
52 double conntrack;
53 FILE *fh;
54 char buffer[64];
56 fh = fopen (CONNTRACK_FILE, "r");
57 if (fh == NULL)
58 return (-1);
60 if (fgets (buffer, sizeof (buffer), fh) == NULL)
61 {
62 fclose (fh);
63 return (-1);
64 }
65 fclose (fh);
67 conntrack = atof (buffer);
69 if (conntrack > 0.0)
70 conntrack_submit (conntrack);
72 return (0);
73 } /* static int conntrack_read */
75 void module_register (void)
76 {
77 plugin_register_read ("conntrack", conntrack_read);
78 } /* void module_register */