1 /**
2 * collectd - src/ping.c
3 * Copyright (C) 2005,2006 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:"COLLECTD_HEARTBEAT":0:65535",
41 NULL
42 };
43 static int ds_num = 1;
45 static char *config_keys[] =
46 {
47 "Host",
48 "TTL",
49 NULL
50 };
51 static int config_keys_num = 2;
53 static void ping_init (void)
54 {
55 return;
56 }
58 static int ping_config (char *key, char *value)
59 {
60 if (pingobj == NULL)
61 {
62 if ((pingobj = ping_construct ()) == NULL)
63 {
64 syslog (LOG_ERR, "ping: `ping_construct' failed: %s",
65 ping_get_error (pingobj));
66 return (1);
67 }
68 }
70 if (strcasecmp (key, "host") == 0)
71 {
72 if (ping_host_add (pingobj, value) < 0)
73 {
74 syslog (LOG_WARNING, "ping: `ping_host_add' failed: %s",
75 ping_get_error (pingobj));
76 return (1);
77 }
78 }
79 else if (strcasecmp (key, "ttl") == 0)
80 {
81 int ttl = atoi (value);
82 if (ping_setopt (pingobj, PING_DEF_TIMEOUT, (void *) &ttl))
83 {
84 syslog (LOG_WARNING, "ping: liboping did not accept the TTL value %i", ttl);
85 return (1);
86 }
87 }
88 else
89 {
90 return (-1);
91 }
93 return (0);
94 }
96 static void ping_write (char *host, char *inst, char *val)
97 {
98 char file[512];
99 int status;
101 status = snprintf (file, 512, file_template, inst);
102 if (status < 1)
103 return;
104 else if (status >= 512)
105 return;
107 rrd_update_file (host, file, val, ds_def, ds_num);
108 }
110 #define BUFSIZE 256
111 static void ping_submit (char *host, double latency)
112 {
113 char buf[BUFSIZE];
115 if (snprintf (buf, BUFSIZE, "%u:%f", (unsigned int) curtime, latency) >= BUFSIZE)
116 return;
118 plugin_submit (MODULE_NAME, host, buf);
119 }
120 #undef BUFSIZE
122 static void ping_read (void)
123 {
124 pingobj_iter_t *iter;
126 char *host;
127 double latency;
129 if (pingobj == NULL)
130 return;
132 if (ping_send (pingobj) < 0)
133 {
134 syslog (LOG_ERR, "ping: `ping_send' failed: %s",
135 ping_get_error (pingobj));
136 return;
137 }
139 for (iter = ping_iterator_get (pingobj); iter != NULL; iter = ping_iterator_next (iter))
140 {
141 const char *tmp;
143 if ((tmp = ping_iterator_get_host (iter)) == NULL)
144 continue;
145 if ((host = strdup (tmp)) == NULL)
146 continue;
148 latency = ping_iterator_get_latency (iter);
150 DBG ("host = %s, latency = %f", host, latency);
151 ping_submit (host, latency);
153 free (host); host = NULL;
154 }
155 }
157 void module_register (void)
158 {
159 plugin_register (MODULE_NAME, ping_init, ping_read, ping_write);
160 cf_register (MODULE_NAME, ping_config, config_keys, config_keys_num);
161 }
163 #undef MODULE_NAME