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[] =
42 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
44 Each table/chain combo that will be queried goes into this list
47 static int old_files = 0;
49 static int conntrack_config(const char *key, const char *value)
51 if (strcmp(key, "OldFiles") == 0)
57 static void conntrack_submit (const char *type, const char *type_instance,
60 value_list_t vl = VALUE_LIST_INIT;
62 vl.values = &conntrack;
64 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
65 sstrncpy (vl.plugin, "conntrack", sizeof (vl.plugin));
66 sstrncpy (vl.type, type, sizeof (vl.type));
67 if (type_instance != NULL)
68 sstrncpy (vl.type_instance, type_instance,
69 sizeof (vl.type_instance));
71 plugin_dispatch_values (&vl);
72 } /* static void conntrack_submit */
74 static int conntrack_read (void)
76 value_t conntrack, conntrack_max, conntrack_pct;
78 char buffer[64] = { 0 };
81 fh = fopen (old_files?CONNTRACK_FILE_OLD:CONNTRACK_FILE, "r");
85 if (fgets (buffer, sizeof (buffer), fh) == NULL)
92 /* strip trailing newline. */
93 buffer_len = strlen (buffer);
94 while ((buffer_len > 0) && isspace ((int) buffer[buffer_len - 1]))
96 buffer[buffer_len - 1] = 0;
100 if (parse_value (buffer, &conntrack, DS_TYPE_GAUGE) != 0)
103 conntrack_submit ("conntrack", NULL, conntrack);
105 fh = fopen (old_files?CONNTRACK_MAX_FILE_OLD:CONNTRACK_MAX_FILE, "r");
109 memset (buffer, 0, sizeof (buffer));
110 if (fgets (buffer, sizeof (buffer), fh) == NULL)
117 /* strip trailing newline. */
118 buffer_len = strlen (buffer);
119 while ((buffer_len > 0) && isspace ((int) buffer[buffer_len - 1]))
121 buffer[buffer_len - 1] = 0;
125 if (parse_value (buffer, &conntrack_max, DS_TYPE_GAUGE) != 0)
128 conntrack_submit ("conntrack", "max", conntrack_max);
129 conntrack_pct.gauge = (conntrack.gauge / conntrack_max.gauge) * 100;
130 conntrack_submit ("percent", "used", conntrack_pct);
134 } /* static int conntrack_read */
136 void module_register (void)
138 plugin_register_config ("conntrack", conntrack_config,
139 config_keys, config_keys_num);
140 plugin_register_read ("conntrack", conntrack_read);
141 } /* void module_register */