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 collectd.org>
30 #error "No applicable input method."
33 #define CONNTRACK_FILE "/proc/sys/net/netfilter/nf_conntrack_count"
34 #define CONNTRACK_MAX_FILE "/proc/sys/net/netfilter/nf_conntrack_max"
35 #define CONNTRACK_FILE_OLD "/proc/sys/net/ipv4/netfilter/ip_conntrack_count"
36 #define CONNTRACK_MAX_FILE_OLD "/proc/sys/net/ipv4/netfilter/ip_conntrack_max"
38 static const char *config_keys[] = {"OldFiles"};
39 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
41 Each table/chain combo that will be queried goes into this list
44 static int old_files = 0;
46 static int conntrack_config(const char *key, const char *value) {
47 if (strcmp(key, "OldFiles") == 0)
53 static void conntrack_submit(const char *type, const char *type_instance,
55 value_list_t vl = VALUE_LIST_INIT;
57 vl.values = &conntrack;
59 sstrncpy(vl.plugin, "conntrack", sizeof(vl.plugin));
60 sstrncpy(vl.type, type, sizeof(vl.type));
61 if (type_instance != NULL)
62 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
64 plugin_dispatch_values(&vl);
65 } /* static void conntrack_submit */
67 static int conntrack_read(void) {
68 value_t conntrack, conntrack_max, conntrack_pct;
70 char const *path = old_files ? CONNTRACK_FILE_OLD : CONNTRACK_FILE;
71 if (parse_value_file(path, &conntrack, DS_TYPE_GAUGE) != 0) {
72 ERROR("conntrack plugin: Reading \"%s\" failed.", path);
76 path = old_files ? CONNTRACK_MAX_FILE_OLD : CONNTRACK_MAX_FILE;
77 if (parse_value_file(path, &conntrack_max, DS_TYPE_GAUGE) != 0) {
78 ERROR("conntrack plugin: Reading \"%s\" failed.", path);
82 conntrack_pct.gauge = (conntrack.gauge / conntrack_max.gauge) * 100;
84 conntrack_submit("conntrack", NULL, conntrack);
85 conntrack_submit("conntrack", "max", conntrack_max);
86 conntrack_submit("percent", "used", conntrack_pct);
89 } /* static int conntrack_read */
91 void module_register(void) {
92 plugin_register_config("conntrack", conntrack_config, config_keys,
94 plugin_register_read("conntrack", conntrack_read);
95 } /* void module_register */