1 /**
2 * collectd - src/ping.c
3 * Copyright (C) 2005 Florian octo Forster
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; either version 2 of the License, or (at your
8 * option) any later version.
9 *
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.
14 *
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
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 **/
23 #include "collectd.h"
24 #include "common.h"
25 #include "plugin.h"
26 #include "configfile.h"
27 #include "utils_debug.h"
29 #define MODULE_NAME "ping"
31 #include <netinet/in.h>
32 #include "liboping/liboping.h"
34 static pingobj_t *pingobj = NULL;
36 static char *file_template = "ping-%s.rrd";
38 static char *ds_def[] =
39 {
40 "DS:ping:GAUGE:25:0:65535",
41 NULL
42 };
43 static int ds_num = 1;
45 static char *config_keys[] =
46 {
47 "Host",
48 NULL
49 };
50 static int config_keys_num = 1;
52 static void ping_init (void)
53 {
54 return;
55 }
57 static int ping_config (char *key, char *value)
58 {
59 if (strcasecmp (key, "host"))
60 {
61 return (-1);
62 }
64 if (pingobj == NULL)
65 {
66 if ((pingobj = ping_construct ()) == NULL)
67 {
68 syslog (LOG_ERR, "ping: `ping_construct' failed.\n");
69 return (-1);
70 }
71 }
73 if (ping_host_add (pingobj, value) < 0)
74 {
75 syslog (LOG_ERR, "ping: `ping_host_add' failed.\n");
76 return (-1);
77 }
79 return (0);
80 }
82 static void ping_write (char *host, char *inst, char *val)
83 {
84 char file[512];
85 int status;
87 status = snprintf (file, 512, file_template, inst);
88 if (status < 1)
89 return;
90 else if (status >= 512)
91 return;
93 rrd_update_file (host, file, val, ds_def, ds_num);
94 }
96 #define BUFSIZE 256
97 static void ping_submit (char *host, double latency)
98 {
99 char buf[BUFSIZE];
101 if (snprintf (buf, BUFSIZE, "%u:%f", (unsigned int) curtime, latency) >= BUFSIZE)
102 return;
104 plugin_submit (MODULE_NAME, host, buf);
105 }
106 #undef BUFSIZE
108 static void ping_read (void)
109 {
110 pingobj_iter_t *iter;
112 char *host;
113 double latency;
115 if (pingobj == NULL)
116 return;
118 if (ping_send (pingobj) < 0)
119 {
120 syslog (LOG_ERR, "ping: `ping_send' failed.");
121 return;
122 }
124 for (iter = ping_iterator_get (pingobj); iter != NULL; iter = ping_iterator_next (iter))
125 {
126 const char *tmp;
128 if ((tmp = ping_iterator_get_host (iter)) == NULL)
129 continue;
130 if ((host = strdup (tmp)) == NULL)
131 continue;
133 latency = ping_iterator_get_latency (iter);
135 DBG ("host = %s, latency = %f", host, latency);
136 ping_submit (host, latency);
138 free (host); host = NULL;
139 }
140 }
142 void module_register (void)
143 {
144 plugin_register (MODULE_NAME, ping_init, ping_read, ping_write);
145 cf_register (MODULE_NAME, ping_config, config_keys, config_keys_num);
146 }
148 #undef MODULE_NAME