2 * collectd - src/conntrack.c
3 * Copyright (C) 2009 Tomasz Pala
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.
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.
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
19 * Tomasz Pala <gotar at pld-linux.org>
20 * based on entropy.c by:
21 * Florian octo Forster <octo at verplant.org>
29 # error "No applicable input method."
32 #define CONNTRACK_FILE "/proc/sys/net/netfilter/nf_conntrack_count"
33 #define CONNTRACK_MAX_FILE "/proc/sys/net/netfilter/nf_conntrack_max"
35 static void conntrack_submit (const char *type, const char *type_instance,
38 value_list_t vl = VALUE_LIST_INIT;
40 vl.values = &conntrack;
42 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
43 sstrncpy (vl.plugin, "conntrack", sizeof (vl.plugin));
44 sstrncpy (vl.type, type, sizeof (vl.type));
45 if (type_instance != NULL)
46 sstrncpy (vl.type_instance, type_instance,
47 sizeof (vl.type_instance));
49 plugin_dispatch_values (&vl);
50 } /* static void conntrack_submit */
52 static int conntrack_read (void)
54 value_t conntrack, conntrack_max, conntrack_pct;
59 fh = fopen (CONNTRACK_FILE, "r");
63 memset (buffer, 0, sizeof (buffer));
64 if (fgets (buffer, sizeof (buffer), fh) == NULL)
71 /* strip trailing newline. */
72 buffer_len = strlen (buffer);
73 while ((buffer_len > 0) && isspace ((int) buffer[buffer_len - 1]))
75 buffer[buffer_len - 1] = 0;
79 if (parse_value (buffer, &conntrack, DS_TYPE_GAUGE) != 0)
82 conntrack_submit ("conntrack", NULL, conntrack);
84 fh = fopen (CONNTRACK_MAX_FILE, "r");
88 memset (buffer, 0, sizeof (buffer));
89 if (fgets (buffer, sizeof (buffer), fh) == NULL)
96 /* strip trailing newline. */
97 buffer_len = strlen (buffer);
98 while ((buffer_len > 0) && isspace ((int) buffer[buffer_len - 1]))
100 buffer[buffer_len - 1] = 0;
104 if (parse_value (buffer, &conntrack_max, DS_TYPE_GAUGE) != 0)
107 conntrack_submit ("conntrack", "max", conntrack_max);
108 conntrack_pct.gauge = (conntrack.gauge / conntrack_max.gauge) * 100;
109 conntrack_submit ("percent", "used", conntrack_pct);
113 } /* static int conntrack_read */
115 void module_register (void)
117 plugin_register_read ("conntrack", conntrack_read);
118 } /* void module_register */