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monitoring-plugins/plugins/check_ping.c
Karl DeBisschop 9e009c4b11 remove call_getopt and asprintf 
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@190 f882894a-f735-0410-b71e-b25c423dba1c
2002-11-13 11:50:54 +00:00

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/*****************************************************************************
*
* CHECK_PING.C
*
* Program: Ping plugin for Nagios
* License: GPL
* Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
*
* $Id$
*
*****************************************************************************/
#define PROGNAME "check_ping"
#define REVISION "$Revision$"
#define COPYRIGHT "1999-2001"
#define AUTHOR "Ethan Galstad/Karl DeBisschop"
#define EMAIL "kdebisschop@users.sourceforge.net"
#define SUMMARY "Use ping to check connection statistics for a remote host.\n"
#define OPTIONS "\
-H <host_address> -w <wrta>,<wpl>%% -c <crta>,<cpl>%%\n\
[-p packets] [-t timeout] [-L]\n"
#define LONGOPTIONS "\
-H, --hostname=HOST\n\
host to ping\n\
-w, --warning=THRESHOLD\n\
warning threshold pair\n\
-c, --critical=THRESHOLD\n\
critical threshold pair\n\
-p, --packets=INTEGER\n\
number of ICMP ECHO packets to send (Default: %d)\n\
-t, --timeout=INTEGER\n\
optional specified timeout in second (Default: %d)\n\
-L, --link\n\
show HTML in the plugin output (obsoleted by urlize)\n\
THRESHOLD is <rta>,<pl>%% where <rta> is the round trip average travel\n\
time (ms) which triggers a WARNING or CRITICAL state, and <pl> is the\n\
percentage of packet loss to trigger an alarm state.\n"
#define DESCRIPTION "\
This plugin uses the ping command to probe the specified host for packet loss\n\
(percentage) and round trip average (milliseconds). It can produce HTML output\n\
linking to a traceroute CGI contributed by Ian Cass. The CGI can be found in\n\
the contrib area of the downloads section at http://www.nagios.org\n\n"
#include "config.h"
#include "common.h"
#include "popen.h"
#include "utils.h"
#define UNKNOWN_PACKET_LOSS 200 /* 200% */
#define UNKNOWN_TRIP_TIME -1.0 /* -1 seconds */
#define DEFAULT_MAX_PACKETS 5 /* default no. of ICMP ECHO packets */
#define WARN_DUPLICATES "DUPLICATES FOUND! "
int process_arguments (int, char **);
int get_threshold (char *, float *, int *);
int validate_arguments (void);
int run_ping (char *);
void print_usage (void);
void print_help (void);
int display_html = FALSE;
int wpl = UNKNOWN_PACKET_LOSS;
int cpl = UNKNOWN_PACKET_LOSS;
float wrta = UNKNOWN_TRIP_TIME;
float crta = UNKNOWN_TRIP_TIME;
char *server_address = NULL;
int max_packets = -1;
int verbose = FALSE;
float rta = UNKNOWN_TRIP_TIME;
int pl = UNKNOWN_PACKET_LOSS;
char *warn_text = NULL;
int
main (int argc, char **argv)
{
char *command_line = NULL;
int result = STATE_UNKNOWN;
if (process_arguments (argc, argv) == ERROR)
usage ("Could not parse arguments");
exit;
/* does the host address of number of packets argument come first? */
#ifdef PING_PACKETS_FIRST
asprintf (&command_line, PING_COMMAND, max_packets, server_address);
#else
asprintf (&command_line, PING_COMMAND, server_address, max_packets);
#endif
/* Set signal handling and alarm */
if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) {
printf ("Cannot catch SIGALRM");
return STATE_UNKNOWN;
}
/* handle timeouts gracefully */
alarm (timeout_interval);
if (verbose)
printf ("%s ==> ", command_line);
/* run the command */
run_ping (command_line);
if (pl == UNKNOWN_PACKET_LOSS || rta == UNKNOWN_TRIP_TIME) {
printf ("%s\n", command_line);
terminate (STATE_UNKNOWN,
"Error: Could not interpret output from ping command\n");
}
if (pl >= cpl || rta >= crta || rta < 0)
result = STATE_CRITICAL;
else if (pl >= wpl || rta >= wrta)
result = STATE_WARNING;
else if (pl < wpl && rta < wrta && pl >= 0 && rta >= 0)
/* cannot use the max function because STATE_UNKNOWN is now 3 gt STATE_OK
result = max (result, STATE_OK); */
if( !( (result == STATE_WARNING) || (result == STATE_CRITICAL) ) ) {
result = STATE_OK;
}
if (display_html == TRUE)
printf ("<A HREF='%s/traceroute.cgi?%s'>", CGIURL, server_address);
if (pl == 100)
printf ("PING %s - %sPacket loss = %d%%", state_text (result), warn_text,
pl);
else
printf ("PING %s - %sPacket loss = %d%%, RTA = %2.2f ms",
state_text (result), warn_text, pl, rta);
if (display_html == TRUE)
printf ("</A>");
printf ("\n");
if (verbose)
printf ("%f:%d%% %f:%d%%\n", wrta, wpl, crta, cpl);
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c = 1;
#ifdef HAVE_GETOPT_H
int option_index = 0;
static struct option long_options[] = {
STD_LONG_OPTS,
{"packets", required_argument, 0, 'p'},
{"nohtml", no_argument, 0, 'n'},
{"link", no_argument, 0, 'L'},
{0, 0, 0, 0}
};
#endif
#define OPTCHARS "Vvht:c:w:H:p:nL"
if (argc < 2)
return ERROR;
for (c = 1; c < argc; c++) {
if (strcmp ("-to", argv[c]) == 0)
strcpy (argv[c], "-t");
if (strcmp ("-nohtml", argv[c]) == 0)
strcpy (argv[c], "-n");
}
while (1) {
#ifdef HAVE_GETOPT_H
c = getopt_long (argc, argv, OPTCHARS, long_options, &option_index);
#else
c = getopt (argc, argv, OPTCHARS);
#endif
if (c == -1 || c == EOF)
break;
switch (c) {
case '?': /* usage */
usage3 ("Unknown argument", optopt);
case 'h': /* help */
print_help ();
exit (STATE_OK);
case 'V': /* version */
print_revision (PROGNAME, REVISION);
exit (STATE_OK);
case 't': /* timeout period */
timeout_interval = atoi (optarg);
break;
case 'v': /* verbose mode */
verbose = TRUE;
break;
case 'H': /* hostname */
if (is_host (optarg) == FALSE)
usage2 ("Invalid host name/address", optarg);
server_address = optarg;
break;
case 'p': /* number of packets to send */
if (is_intnonneg (optarg))
max_packets = atoi (optarg);
else
usage2 ("<max_packets> (%s) must be a non-negative number\n", optarg);
break;
case 'n': /* no HTML */
display_html = FALSE;
break;
case 'L': /* show HTML */
display_html = TRUE;
break;
case 'c':
get_threshold (optarg, &crta, &cpl);
break;
case 'w':
get_threshold (optarg, &wrta, &wpl);
break;
}
}
c = optind;
if (c == argc)
return validate_arguments ();
if (server_address == NULL) {
if (is_host (argv[c]) == FALSE) {
printf ("Invalid host name/address: %s\n\n", argv[c]);
return ERROR;
} else {
server_address = argv[c++];
if (c == argc)
return validate_arguments ();
}
}
if (wpl == UNKNOWN_PACKET_LOSS) {
if (is_intpercent (argv[c]) == FALSE) {
printf ("<wpl> (%s) must be an integer percentage\n", argv[c]);
return ERROR;
} else {
wpl = atoi (argv[c++]);
if (c == argc)
return validate_arguments ();
}
}
if (cpl == UNKNOWN_PACKET_LOSS) {
if (is_intpercent (argv[c]) == FALSE) {
printf ("<cpl> (%s) must be an integer percentage\n", argv[c]);
return ERROR;
} else {
cpl = atoi (argv[c++]);
if (c == argc)
return validate_arguments ();
}
}
if (wrta == UNKNOWN_TRIP_TIME) {
if (is_negative (argv[c])) {
printf ("<wrta> (%s) must be a non-negative number\n", argv[c]);
return ERROR;
} else {
wrta = atof (argv[c++]);
if (c == argc)
return validate_arguments ();
}
}
if (crta == UNKNOWN_TRIP_TIME) {
if (is_negative (argv[c])) {
printf ("<crta> (%s) must be a non-negative number\n", argv[c]);
return ERROR;
} else {
crta = atof (argv[c++]);
if (c == argc)
return validate_arguments ();
}
}
if (max_packets == -1) {
if (is_intnonneg (argv[c])) {
max_packets = atoi (argv[c++]);
} else {
printf ("<max_packets> (%s) must be a non-negative number\n", argv[c]);
return ERROR;
}
}
return validate_arguments ();
}
int
get_threshold (char *arg, float *trta, int *tpl)
{
if (is_intnonneg (arg) && sscanf (arg, "%f", trta) == 1)
return OK;
else if (strpbrk (arg, ",:") && strstr (arg, "%") && sscanf (arg, "%f%*[:,]%d%%", trta, tpl) == 2)
return OK;
else if (strstr (arg, "%") && sscanf (arg, "%d%%", tpl) == 1)
return OK;
else
usage2 ("%s: Warning threshold must be integer or percentage!\n\n", arg);
}
int
validate_arguments ()
{
float max_seconds;
if (wrta == UNKNOWN_TRIP_TIME) {
printf ("<wrta> was not set\n");
return ERROR;
}
else if (crta == UNKNOWN_TRIP_TIME) {
printf ("<crta> was not set\n");
return ERROR;
}
else if (wpl == UNKNOWN_PACKET_LOSS) {
printf ("<wpl> was not set\n");
return ERROR;
}
else if (cpl == UNKNOWN_PACKET_LOSS) {
printf ("<cpl> was not set\n");
return ERROR;
}
else if (wrta > crta) {
printf ("<wrta> (%f) cannot be larger than <crta> (%f)\n", wrta, crta);
return ERROR;
}
else if (wpl > cpl) {
printf ("<wpl> (%d) cannot be larger than <cpl> (%d)\n", wpl, cpl);
return ERROR;
}
if (max_packets == -1)
max_packets = DEFAULT_MAX_PACKETS;
max_seconds = crta / 1000.0 * max_packets + max_packets;
if (max_seconds > timeout_interval)
timeout_interval = (int)max_seconds;
return OK;
}
int
run_ping (char *command_line)
{
char input_buffer[MAX_INPUT_BUFFER];
int result = STATE_UNKNOWN;
warn_text = malloc (1);
if (warn_text == NULL)
terminate (STATE_UNKNOWN, "unable to malloc warn_text");
warn_text[0] = 0;
if ((child_process = spopen (command_line)) == NULL) {
printf ("Cannot open pipe: ");
terminate (STATE_UNKNOWN, command_line);
}
child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
if (child_stderr == NULL)
printf ("Cannot open stderr for %s\n", command_line);
while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
if (strstr (input_buffer, "(DUP!)")) {
/* cannot use the max function since STATE_UNKNOWN is max
result = max (result, STATE_WARNING); */
if( !(result == STATE_CRITICAL) ){
result = STATE_WARNING;
}
warn_text = realloc (warn_text, strlen (WARN_DUPLICATES) + 1);
if (warn_text == NULL)
terminate (STATE_UNKNOWN, "unable to realloc warn_text");
strcpy (warn_text, WARN_DUPLICATES);
}
/* get the percent loss statistics */
if (sscanf
(input_buffer, "%*d packets transmitted, %*d packets received, +%*d errors, %d%% packet loss",
&pl) == 1
|| sscanf
(input_buffer, "%*d packets transmitted, %*d packets received, %d%% packet loss",
&pl) == 1
|| sscanf
(input_buffer, "%*d packets transmitted, %*d packets received, %d%% loss, time", &pl) == 1
|| sscanf
(input_buffer, "%*d packets transmitted, %*d received, %d%% loss, time", &pl) == 1
/* Suse 8.0 as reported by Richard * Brodie */
)
continue;
/* get the round trip average */
else
if (sscanf (input_buffer, "round-trip min/avg/max = %*f/%f/%*f", &rta)
== 1
|| sscanf (input_buffer,
"round-trip min/avg/max/mdev = %*f/%f/%*f/%*f",
&rta) == 1
|| sscanf (input_buffer,
"round-trip min/avg/max/sdev = %*f/%f/%*f/%*f",
&rta) == 1
|| sscanf (input_buffer,
"round-trip min/avg/max/stddev = %*f/%f/%*f/%*f",
&rta) == 1
|| sscanf (input_buffer,
"round-trip min/avg/max/std-dev = %*f/%f/%*f/%*f",
&rta) == 1
|| sscanf (input_buffer, "round-trip (ms) min/avg/max = %*f/%f/%*f",
&rta) == 1
|| sscanf (input_buffer, "rtt min/avg/max/mdev = %*f/%f/%*f/%*f ms",
&rta) == 1
)
continue;
}
/* this is needed because there is no rta if all packets are lost */
if (pl == 100)
rta = crta;
/* check stderr */
while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr)) {
if (strstr
(input_buffer,
"Warning: no SO_TIMESTAMP support, falling back to SIOCGSTAMP"))
continue;
if (strstr (input_buffer, "Network is unreachable"))
terminate (STATE_CRITICAL, "PING CRITICAL - Network unreachable (%s)",
server_address);
else if (strstr (input_buffer, "Destination Host Unreachable"))
terminate (STATE_CRITICAL, "PING CRITICAL - Host Unreachable (%s)",
server_address);
else if (strstr (input_buffer, "unknown host" ) )
terminate (STATE_CRITICAL, "PING CRITICAL - Host not found (%s)",
server_address);
warn_text =
realloc (warn_text, strlen (warn_text) + strlen (input_buffer) + 2);
if (warn_text == NULL)
terminate (STATE_UNKNOWN, "unable to realloc warn_text");
if (strlen (warn_text) == 0)
strcpy (warn_text, input_buffer);
else
sprintf (warn_text, "%s %s", warn_text, input_buffer);
if (strstr (input_buffer, "DUPLICATES FOUND")) {
if( !(result == STATE_CRITICAL) ){
result = STATE_WARNING;
}
}
else
result = STATE_CRITICAL ;
}
(void) fclose (child_stderr);
/* close the pipe - WARNING if status is set */
if (spclose (child_process))
result = max_state (result, STATE_WARNING);
return result;
}
void
print_usage (void)
{
printf ("Usage:\n" " %s %s\n"
#ifdef HAVE_GETOPT_H
" %s (-h | --help) for detailed help\n"
" %s (-V | --version) for version information\n",
#else
" %s -h for detailed help\n"
" %s -V for version information\n",
#endif
PROGNAME, OPTIONS, PROGNAME, PROGNAME);
}
void
print_help (void)
{
print_revision (PROGNAME, REVISION);
printf
("Copyright (c) %s %s <%s>\n\n%s\n",
COPYRIGHT, AUTHOR, EMAIL, SUMMARY);
print_usage ();
printf
("\nOptions:\n" LONGOPTIONS "\n" DESCRIPTION "\n",
DEFAULT_MAX_PACKETS, DEFAULT_SOCKET_TIMEOUT);
support ();
}
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