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pkg-monitoring-plugins/plugins/check_ping.c

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/*****************************************************************************
*
* Monitoring check_ping plugin
*
* License: GPL
* Copyright (c) 2000-2007 Monitoring Plugins Development Team
*
* Description:
*
* This file contains the check_ping plugin
*
* Use the ping program to check connection statistics for a remote host.
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
*****************************************************************************/
const char *progname = "check_ping";
const char *copyright = "2000-2007";
const char *email = "devel@monitoring-plugins.org";
#include "common.h"
#include "netutils.h"
#include "popen.h"
#include "utils.h"
#include <signal.h>
#define WARN_DUPLICATES "DUPLICATES FOUND! "
#define UNKNOWN_TRIP_TIME -1.0 /* -1 seconds */
enum {
UNKNOWN_PACKET_LOSS = 200, /* 200% */
DEFAULT_MAX_PACKETS = 5 /* default no. of ICMP ECHO packets */
};
int process_arguments (int, char **);
int get_threshold (char *, float *, int *);
int validate_arguments (void);
int run_ping (const char *cmd, const char *addr);
int error_scan (char buf[MAX_INPUT_BUFFER], const char *addr);
void print_usage (void);
void print_help (void);
bool display_html = false;
int wpl = UNKNOWN_PACKET_LOSS;
int cpl = UNKNOWN_PACKET_LOSS;
float wrta = UNKNOWN_TRIP_TIME;
float crta = UNKNOWN_TRIP_TIME;
char **addresses = NULL;
int n_addresses = 0;
int max_addr = 1;
int max_packets = -1;
int verbose = 0;
float rta = UNKNOWN_TRIP_TIME;
int pl = UNKNOWN_PACKET_LOSS;
char *warn_text;
int
main (int argc, char **argv)
{
char *cmd = NULL;
char *rawcmd = NULL;
int result = STATE_UNKNOWN;
int this_result = STATE_UNKNOWN;
int i;
setlocale (LC_ALL, "");
setlocale (LC_NUMERIC, "C");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
addresses = malloc (sizeof(char*) * max_addr);
addresses[0] = NULL;
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
/* Set signal handling and alarm */
if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) {
usage4 (_("Cannot catch SIGALRM"));
}
/* If ./configure finds ping has timeout values, set plugin alarm slightly
* higher so that we can use response from command line ping */
#if defined(PING_PACKETS_FIRST) && defined(PING_HAS_TIMEOUT)
alarm (timeout_interval + 1);
#else
alarm (timeout_interval);
#endif
for (i = 0 ; i < n_addresses ; i++) {
#ifdef PING6_COMMAND
if (address_family != AF_INET && is_inet6_addr(addresses[i]))
rawcmd = strdup(PING6_COMMAND);
else
rawcmd = strdup(PING_COMMAND);
#else
rawcmd = strdup(PING_COMMAND);
#endif
/* does the host address of number of packets argument come first? */
#ifdef PING_PACKETS_FIRST
# ifdef PING_HAS_TIMEOUT
xasprintf (&cmd, rawcmd, timeout_interval, max_packets, addresses[i]);
# else
xasprintf (&cmd, rawcmd, max_packets, addresses[i]);
# endif
#else
xasprintf (&cmd, rawcmd, addresses[i], max_packets);
#endif
if (verbose >= 2)
printf ("CMD: %s\n", cmd);
/* run the command */
this_result = run_ping (cmd, addresses[i]);
if (pl == UNKNOWN_PACKET_LOSS || rta < 0.0) {
printf ("%s\n", cmd);
die (STATE_UNKNOWN,
_("CRITICAL - Could not interpret output from ping command\n"));
}
if (pl >= cpl || rta >= crta || rta < 0)
this_result = STATE_CRITICAL;
else if (pl >= wpl || rta >= wrta)
this_result = STATE_WARNING;
else if (pl >= 0 && rta >= 0)
this_result = max_state (STATE_OK, this_result);
if (n_addresses > 1 && this_result != STATE_UNKNOWN)
die (STATE_OK, "%s is alive\n", addresses[i]);
if (display_html == true)
printf ("<A HREF='%s/traceroute.cgi?%s'>", CGIURL, addresses[i]);
if (pl == 100)
printf (_("PING %s - %sPacket loss = %d%%"), state_text (this_result), warn_text,
pl);
else
printf (_("PING %s - %sPacket loss = %d%%, RTA = %2.2f ms"),
state_text (this_result), warn_text, pl, rta);
if (display_html == true)
printf ("</A>");
/* Print performance data */
if (pl != 100) {
printf("|%s", fperfdata ("rta", (double) rta, "ms",
wrta>0?true:false, wrta,
crta>0?true:false, crta,
true, 0, false, 0));
} else {
printf("| rta=U;%f;%f;;", wrta, crta);
}
printf(" %s\n", perfdata ("pl", (long) pl, "%",
wpl>0?true:false, wpl,
cpl>0?true:false, cpl,
true, 0, false, 0));
if (verbose >= 2)
printf ("%f:%d%% %f:%d%%\n", wrta, wpl, crta, cpl);
result = max_state (result, this_result);
free (rawcmd);
free (cmd);
}
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c = 1;
char *ptr;
int option = 0;
static struct option longopts[] = {
STD_LONG_OPTS,
{"packets", required_argument, 0, 'p'},
{"nohtml", no_argument, 0, 'n'},
{"link", no_argument, 0, 'L'},
{"use-ipv4", no_argument, 0, '4'},
{"use-ipv6", no_argument, 0, '6'},
{0, 0, 0, 0}
};
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) {
c = getopt_long (argc, argv, "VvhnL46t:c:w:H:p:", longopts, &option);
if (c == -1 || c == EOF)
break;
switch (c) {
case '?': /* usage */
usage5 ();
case 'h': /* help */
print_help ();
exit (STATE_UNKNOWN);
break;
case 'V': /* version */
print_revision (progname, NP_VERSION);
exit (STATE_UNKNOWN);
break;
case 't': /* timeout period */
timeout_interval = atoi (optarg);
break;
case 'v': /* verbose mode */
verbose++;
break;
case '4': /* IPv4 only */
address_family = AF_INET;
break;
case '6': /* IPv6 only */
#ifdef USE_IPV6
address_family = AF_INET6;
#else
usage (_("IPv6 support not available\n"));
#endif
break;
case 'H': /* hostname */
ptr=optarg;
while (1) {
n_addresses++;
if (n_addresses > max_addr) {
max_addr *= 2;
addresses = realloc (addresses, sizeof(char*) * max_addr);
if (addresses == NULL)
die (STATE_UNKNOWN, _("Could not realloc() addresses\n"));
}
addresses[n_addresses-1] = ptr;
if ((ptr = index (ptr, ','))) {
strcpy (ptr, "");
ptr += sizeof(char);
} else {
break;
}
}
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 (addresses[0] == NULL) {
if (!is_host (argv[c])) {
usage2 (_("Invalid hostname/address"), argv[c]);
} else {
addresses[0] = argv[c++];
n_addresses++;
if (c == argc)
return validate_arguments ();
}
}
if (wpl == UNKNOWN_PACKET_LOSS) {
if (!is_intpercent (argv[c])) {
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])) {
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 < 0.0) {
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 < 0.0) {
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;
usage2 (_("%s: Warning threshold must be integer or percentage!\n\n"), arg);
return STATE_UNKNOWN;
}
int
validate_arguments ()
{
float max_seconds;
int i;
if (wrta < 0.0) {
printf (_("<wrta> was not set\n"));
return ERROR;
}
else if (crta < 0.0) {
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;
for (i=0; i<n_addresses; i++) {
if (!is_host(addresses[i]))
usage2 (_("Invalid hostname/address"), addresses[i]);
}
if (n_addresses == 0) {
usage (_("You must specify a server address or host name"));
}
return OK;
}
int
run_ping (const char *cmd, const char *addr)
{
char buf[MAX_INPUT_BUFFER];
int result = STATE_UNKNOWN;
int match;
if ((child_process = spopen (cmd)) == NULL)
die (STATE_UNKNOWN, _("Could not open pipe: %s\n"), cmd);
child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
if (child_stderr == NULL)
printf (_("Cannot open stderr for %s\n"), cmd);
while (fgets (buf, MAX_INPUT_BUFFER - 1, child_process)) {
if (verbose >= 3)
printf("Output: %s", buf);
result = max_state (result, error_scan (buf, addr));
/* get the percent loss statistics */
match = 0;
if((sscanf(buf,"%*d packets transmitted, %*d packets received, +%*d errors, %d%% packet loss%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted, %*d packets received, +%*d duplicates, %d%% packet loss%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted, %*d received, +%*d duplicates, %d%% packet loss%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted, %*d packets received, %d%% packet loss%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted, %*d packets received, %d%% loss, time%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted, %*d received, %d%% loss, time%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted, %*d received, %d%% packet loss, time%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted, %*d received, +%*d errors, %d%% packet loss%n",&pl,&match) && match) ||
(sscanf(buf,"%*d packets transmitted %*d received, +%*d errors, %d%% packet loss%n",&pl,&match) && match) ||
(sscanf(buf,"%*[^(](%d%% %*[^)])%n",&pl,&match) && match)
)
continue;
/* get the round trip average */
else
if((sscanf(buf,"round-trip min/avg/max = %*f/%f/%*f%n",&rta,&match) && match) ||
(sscanf(buf,"round-trip min/avg/max/mdev = %*f/%f/%*f/%*f%n",&rta,&match) && match) ||
(sscanf(buf,"round-trip min/avg/max/sdev = %*f/%f/%*f/%*f%n",&rta,&match) && match) ||
(sscanf(buf,"round-trip min/avg/max/stddev = %*f/%f/%*f/%*f%n",&rta,&match) && match) ||
(sscanf(buf,"round-trip min/avg/max/std-dev = %*f/%f/%*f/%*f%n",&rta,&match) && match) ||
(sscanf(buf,"round-trip (ms) min/avg/max = %*f/%f/%*f%n",&rta,&match) && match) ||
(sscanf(buf,"round-trip (ms) min/avg/max/stddev = %*f/%f/%*f/%*f%n",&rta,&match) && match) ||
(sscanf(buf,"rtt min/avg/max/mdev = %*f/%f/%*f/%*f ms%n",&rta,&match) && match) ||
(sscanf(buf, "%*[^=] = %*fms, %*[^=] = %*fms, %*[^=] = %fms%n", &rta, &match) && match)
)
continue;
}
/* this is needed because there is no rta if all packets are lost */
if (pl == 100)
rta = crta;
/* check stderr, setting at least WARNING if there is output here */
/* Add warning into warn_text */
while (fgets (buf, MAX_INPUT_BUFFER - 1, child_stderr)) {
if (
! strstr(buf,"WARNING - no SO_TIMESTAMP support, falling back to SIOCGSTAMP")
&& ! strstr(buf,"Warning: time of day goes back")
) {
if (verbose >= 3) {
printf("Got stderr: %s", buf);
}
if ((result=error_scan(buf, addr)) == STATE_OK) {
result = STATE_WARNING;
if (warn_text == NULL) {
warn_text = strdup(_("System call sent warnings to stderr "));
} else {
xasprintf(&warn_text, "%s %s", warn_text, _("System call sent warnings to stderr "));
}
}
}
}
(void) fclose (child_stderr);
spclose (child_process);
if (warn_text == NULL)
warn_text = strdup("");
return result;
}
int
error_scan (char buf[MAX_INPUT_BUFFER], const char *addr)
{
if (strstr (buf, "Network is unreachable") ||
strstr (buf, "Destination Net Unreachable") ||
strstr (buf, "No route")
)
die (STATE_CRITICAL, _("CRITICAL - Network Unreachable (%s)\n"), addr);
else if (strstr (buf, "Destination Host Unreachable") || strstr(buf, "Address unreachable"))
die (STATE_CRITICAL, _("CRITICAL - Host Unreachable (%s)\n"), addr);
else if (strstr (buf, "Destination Port Unreachable") || strstr(buf, "Port unreachable"))
die (STATE_CRITICAL, _("CRITICAL - Bogus ICMP: Port Unreachable (%s)\n"), addr);
else if (strstr (buf, "Destination Protocol Unreachable"))
die (STATE_CRITICAL, _("CRITICAL - Bogus ICMP: Protocol Unreachable (%s)\n"), addr);
else if (strstr (buf, "Destination Net Prohibited"))
die (STATE_CRITICAL, _("CRITICAL - Network Prohibited (%s)\n"), addr);
else if (strstr (buf, "Destination Host Prohibited"))
die (STATE_CRITICAL, _("CRITICAL - Host Prohibited (%s)\n"), addr);
else if (strstr (buf, "Packet filtered") || strstr(buf, "Administratively prohibited"))
die (STATE_CRITICAL, _("CRITICAL - Packet Filtered (%s)\n"), addr);
else if (strstr (buf, "unknown host" ))
die (STATE_CRITICAL, _("CRITICAL - Host not found (%s)\n"), addr);
else if (strstr (buf, "Time to live exceeded") || strstr(buf, "Time exceeded"))
die (STATE_CRITICAL, _("CRITICAL - Time to live exceeded (%s)\n"), addr);
else if (strstr (buf, "Destination unreachable: "))
die (STATE_CRITICAL, _("CRITICAL - Destination Unreachable (%s)\n"), addr);
if (strstr (buf, "(DUP!)") || strstr (buf, "DUPLICATES FOUND")) {
if (warn_text == NULL)
warn_text = strdup (_(WARN_DUPLICATES));
else if (! strstr (warn_text, _(WARN_DUPLICATES)) &&
xasprintf (&warn_text, "%s %s", warn_text, _(WARN_DUPLICATES)) == -1)
die (STATE_UNKNOWN, _("Unable to realloc warn_text\n"));
return (STATE_WARNING);
}
return (STATE_OK);
}
void
print_help (void)
{
print_revision (progname, NP_VERSION);
printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
printf (COPYRIGHT, copyright, email);
printf (_("Use ping to check connection statistics for a remote host."));
printf ("\n\n");
print_usage ();
printf (UT_HELP_VRSN);
printf (UT_EXTRA_OPTS);
printf (UT_IPv46);
printf (" %s\n", "-H, --hostname=HOST");
printf (" %s\n", _("host to ping"));
printf (" %s\n", "-w, --warning=THRESHOLD");
printf (" %s\n", _("warning threshold pair"));
printf (" %s\n", "-c, --critical=THRESHOLD");
printf (" %s\n", _("critical threshold pair"));
printf (" %s\n", "-p, --packets=INTEGER");
printf (" %s ", _("number of ICMP ECHO packets to send"));
printf (_("(Default: %d)\n"), DEFAULT_MAX_PACKETS);
printf (" %s\n", "-L, --link");
printf (" %s\n", _("show HTML in the plugin output (obsoleted by urlize)"));
printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
printf ("\n");
printf ("%s\n", _("THRESHOLD is <rta>,<pl>% where <rta> is the round trip average travel"));
printf ("%s\n", _("time (ms) which triggers a WARNING or CRITICAL state, and <pl> is the"));
printf ("%s\n", _("percentage of packet loss to trigger an alarm state."));
printf ("\n");
printf ("%s\n", _("This plugin uses the ping command to probe the specified host for packet loss"));
printf ("%s\n", _("(percentage) and round trip average (milliseconds). It can produce HTML output"));
printf ("%s\n", _("linking to a traceroute CGI contributed by Ian Cass. The CGI can be found in"));
printf ("%s\n", _("the contrib area of the downloads section at http://www.nagios.org/"));
printf (UT_SUPPORT);
}
void
print_usage (void)
{
printf ("%s\n", _("Usage:"));
printf ("%s -H <host_address> -w <wrta>,<wpl>%% -c <crta>,<cpl>%%\n", progname);
printf (" [-p packets] [-t timeout] [-4|-6]\n");
}
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