2 * collectd - src/ping.c
3 * Copyright (C) 2005 Florian octo Forster
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; either version 2 of the License, or (at your
8 * option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Florian octo Forster <octo at verplant.org>
26 #include "configfile.h"
28 #define MODULE_NAME "ping"
30 #include <netinet/in.h>
31 #include "libping/ping.h"
33 #define MAX_PINGHOSTS 32
35 static char *hosts[MAX_PINGHOSTS];
36 static int hosts_flags[MAX_PINGHOSTS];
37 static int hosts_disable[MAX_PINGHOSTS];
38 static int hosts_backoff[MAX_PINGHOSTS];
39 static int num_pinghosts;
41 static char *file_template = "ping-%s.rrd";
43 static char *ds_def[] =
45 "DS:ping:GAUGE:25:0:65535",
48 static int ds_num = 1;
50 static char *config_keys[] =
55 static int config_keys_num = 1;
57 static void ping_init (void)
61 for (i = 0; i < MAX_PINGHOSTS; i++)
71 static int ping_config (char *key, char *value)
73 if (strcasecmp (key, "host"))
77 else if (num_pinghosts >= MAX_PINGHOSTS)
81 else if ((hosts[num_pinghosts] = strdup (value)) == NULL)
87 hosts_flags[num_pinghosts] = 0;
93 static void ping_write (char *host, char *inst, char *val)
98 status = snprintf (file, 512, file_template, inst);
101 else if (status >= 512)
104 rrd_update_file (host, file, val, ds_def, ds_num);
108 static void ping_submit (int ping_time, char *host)
112 if (snprintf (buf, BUFSIZE, "%u:%u", (unsigned int) curtime, ping_time) >= BUFSIZE)
115 plugin_submit (MODULE_NAME, host, buf);
119 static void ping_read (void)
124 for (i = 0; i < num_pinghosts; i++)
126 if (hosts_disable[i] > 0)
132 ping = tpinghost (hosts[i]);
137 if (!(hosts_flags[i] & 0x01))
138 syslog (LOG_WARNING, "ping %s: Connection timed out.", hosts[i]);
139 hosts_flags[i] |= 0x01;
143 if (!(hosts_flags[i] & 0x02))
144 syslog (LOG_WARNING, "ping %s: Host or service is not reachable.", hosts[i]);
145 hosts_flags[i] |= 0x02;
149 syslog (LOG_ERR, "ping %s: Socket error. Ping will be disabled for %i iteration(s).",
150 hosts[i], hosts_backoff[i]);
151 hosts_disable[i] = hosts_backoff[i];
152 if (hosts_backoff[i] < 8192) /* 22 3/4 hours */
153 hosts_backoff[i] *= 2;
154 hosts_flags[i] |= 0x10;
158 if (!(hosts_flags[i] & 0x04))
159 syslog (LOG_WARNING, "ping %s: Connection refused.", hosts[i]);
160 hosts_flags[i] |= 0x04;
164 if (hosts_flags[i] != 0x00)
165 syslog (LOG_NOTICE, "ping %s: Back to normal: %ims.", hosts[i], ping);
166 hosts_flags[i] = 0x00;
167 hosts_backoff[i] = 1;
168 ping_submit (ping, hosts[i]);
169 } /* switch (ping) */
170 } /* for (i = 0; i < num_pinghosts; i++) */
173 void module_register (void)
175 plugin_register (MODULE_NAME, ping_init, ping_read, ping_write);
176 cf_register (MODULE_NAME, ping_config, config_keys, config_keys_num);