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 "ping.h"
25 #if COLLECT_PING
26 #define MODULE_NAME "ping"
28 #include "plugin.h"
29 #include "common.h"
31 #include <netinet/in.h>
32 #include "libping/ping.h"
34 extern char *pinghosts[MAX_PINGHOSTS];
35 extern int num_pinghosts;
36 static int pingerrors[MAX_PINGHOSTS];
38 static char *file_template = "ping-%s.rrd";
40 static char *ds_def[] =
41 {
42 "DS:ping:GAUGE:25:0:65535",
43 NULL
44 };
45 static int ds_num = 1;
47 extern time_t curtime;
49 void ping_init (void)
50 {
51 int i;
53 for (i = 0; i < num_pinghosts; i++)
54 pingerrors[i] = 0;
56 return;
57 }
59 void ping_write (char *host, char *inst, char *val)
60 {
61 char file[512];
62 int status;
64 status = snprintf (file, 512, file_template, inst);
65 if (status < 1)
66 return;
67 else if (status >= 512)
68 return;
70 rrd_update_file (host, file, val, ds_def, ds_num);
71 }
73 #define BUFSIZE 256
74 void ping_submit (int ping_time, char *host)
75 {
76 char buf[BUFSIZE];
78 if (snprintf (buf, BUFSIZE, "%u:%u", (unsigned int) curtime, ping_time) >= BUFSIZE)
79 return;
81 plugin_submit (MODULE_NAME, host, buf);
82 }
83 #undef BUFSIZE
85 void ping_read (void)
86 {
87 int ping;
88 int i;
90 for (i = 0; i < num_pinghosts; i++)
91 {
92 if (pingerrors[i] & 0x30)
93 continue;
95 ping = tpinghost (pinghosts[i]);
97 switch (ping)
98 {
99 case 0:
100 if (!(pingerrors[i] & 0x01))
101 syslog (LOG_WARNING, "ping %s: Connection timed out.", pinghosts[i]);
102 pingerrors[i] |= 0x01;
103 break;
105 case -1:
106 if (!(pingerrors[i] & 0x02))
107 syslog (LOG_WARNING, "ping %s: Host or service is not reachable.", pinghosts[i]);
108 pingerrors[i] |= 0x02;
109 break;
111 case -2:
112 syslog (LOG_ERR, "ping %s: Socket error. Ping will be disabled.", pinghosts[i]);
113 pingerrors[i] |= 0x10;
114 break;
116 case -3:
117 if (!(pingerrors[i] & 0x04))
118 syslog (LOG_WARNING, "ping %s: Connection refused.", pinghosts[i]);
119 pingerrors[i] |= 0x04;
120 break;
122 default:
123 if (pingerrors[i] != 0x00)
124 syslog (LOG_NOTICE, "ping %s: Back to normal: %ims.", pinghosts[i], ping);
125 pingerrors[i] = 0x00;
126 ping_submit (ping, pinghosts[i]);
127 } /* switch (ping) */
128 } /* for (i = 0; i < num_pinghosts; i++) */
129 }
131 void module_register (void)
132 {
133 plugin_register (MODULE_NAME, ping_init, ping_read, ping_write);
134 }
136 #undef MODULE_NAME
137 #endif /* COLLECT_PING */