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diff --git a/plugins/check_dig.c b/plugins/check_dig.c
index f80a9dc2f145caec6c6eb265fe481e616fe6bf49..45189b000d222ce7c4ca0a7186103bafaabaddfa 100644 (file)
--- a/plugins/check_dig.c
+++ b/plugins/check_dig.c
/*****************************************************************************
-*
-* This program is free software; you can redistribute it and/or modify
+*
+* Nagios check_dig plugin
+*
+* License: GPL
+* Copyright (c) 2002-2008 Nagios Plugins Development Team
+*
+* Description:
+*
+* This file contains the check_dig plugin
+*
+*
+* 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 2 of the License, or
+* 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, write to the Free Software
-* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*
+* along with this program. If not, see <http://www.gnu.org/licenses/>.
+*
+*
*****************************************************************************/
+/* Hackers note:
+ * There are typecasts to (char *) from _("foo bar") in this file.
+ * They prevent compiler warnings. Never (ever), permute strings obtained
+ * that are typecast from (const char *) (which happens when --disable-nls)
+ * because on some architectures those strings are in non-writable memory */
+
const char *progname = "check_dig";
-const char *revision = "$Revision$";
-const char *copyright = "2002-2003";
-const char *authors = "Nagios Plugin Development Team";
+const char *copyright = "2002-2008";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
-const char *summary = "Test the DNS service on the specified host using dig\n";
-
-const char *option_summary = "-H host -l lookup [-t timeout] [-v]";
-
-const char *options = "\
- -H, --hostname=STRING or IPADDRESS\n\
- Check server on the indicated host\n\
- -l, --lookup=STRING\n\
- machine name to lookup\n\
- -t, --timeout=INTEGER\n\
- Seconds before connection attempt times out (default: %d)\n\
- -v, --verbose\n\
- Print extra information (command-line use only)\n\
- -h, --help\n\
- Print detailed help screen\n\
- -V, --version\n\
- Print version information\n\n";
-
-#include "config.h"
+
#include "common.h"
+#include "netutils.h"
#include "utils.h"
-#include "popen.h"
+#include "runcmd.h"
int process_arguments (int, char **);
int validate_arguments (void);
void print_help (void);
void print_usage (void);
+#define UNDEFINED 0
+#define DEFAULT_PORT 53
+
char *query_address = NULL;
+char *record_type = "A";
+char *expected_address = NULL;
char *dns_server = NULL;
+char *dig_args = "";
int verbose = FALSE;
+int server_port = DEFAULT_PORT;
+double warning_interval = UNDEFINED;
+double critical_interval = UNDEFINED;
+struct timeval tv;
int
main (int argc, char **argv)
{
- char input_buffer[MAX_INPUT_BUFFER];
- char *command_line = NULL;
- char *output = "";
- int result = STATE_UNKNOWN;
-
- /* Set signal handling and alarm */
- if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR)
- usage ("Cannot catch SIGALRM\n");
-
- if (process_arguments (argc, argv) != OK)
- usage ("Could not parse arguments\n");
-
- /* get the command to run */
- asprintf (&command_line, "%s @%s %s", PATH_TO_DIG, dns_server, query_address);
-
- alarm (timeout_interval);
- time (&start_time);
-
- if (verbose)
- printf ("%s\n", command_line);
- /* run the command */
- child_process = spopen (command_line);
- if (child_process == NULL) {
- printf ("Could not open pipe: %s\n", command_line);
- return STATE_UNKNOWN;
- }
-
- child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
- if (child_stderr == NULL)
- printf ("Could not open stderr for %s\n", command_line);
-
- while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
-
- /* the server is responding, we just got the host name... */
- if (strstr (input_buffer, ";; ANSWER SECTION:")) {
-
- /* get the host address */
- if (!fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process))
- break;
-
- if (strpbrk (input_buffer, "\r\n"))
- input_buffer[strcspn (input_buffer, "\r\n")] = '\0';
-
- if (strstr (input_buffer, query_address) == input_buffer) {
- asprintf (&output, input_buffer);
- result = STATE_OK;
- }
- else {
- asprintf (&output, "Server not found in ANSWER SECTION");
- result = STATE_WARNING;
- }
-
- continue;
- }
-
- }
-
- if (result != STATE_OK) {
- asprintf (&output, "No ANSWER SECTION found");
- }
-
- while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr)) {
- /* If we get anything on STDERR, at least set warning */
- result = max_state (result, STATE_WARNING);
- printf ("%s", input_buffer);
- if (strlen (output) == 0)
- asprintf (&output, 1 + index (input_buffer, ':'));
- }
-
- (void) fclose (child_stderr);
-
- /* close the pipe */
- if (spclose (child_process)) {
- result = max_state (result, STATE_WARNING);
- if (strlen (output) == 0)
- asprintf (&output, "dig returned error status");
- }
-
- (void) time (&end_time);
-
- if (output == NULL || strlen (output) == 0)
- asprintf (&output, " Probably a non-existent host/domain");
-
- if (result == STATE_OK)
- printf ("DNS OK - %d seconds response time (%s)\n",
- (int) (end_time - start_time), output);
- else if (result == STATE_WARNING)
- printf ("DNS WARNING - %s\n", output);
- else if (result == STATE_CRITICAL)
- printf ("DNS CRITICAL - %s\n", output);
- else
- printf ("DNS problem - %s\n", output);
-
- return result;
+ char *command_line;
+ output chld_out, chld_err;
+ char *msg = NULL;
+ size_t i;
+ char *t;
+ long microsec;
+ double elapsed_time;
+ int result = STATE_UNKNOWN;
+
+ setlocale (LC_ALL, "");
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
+
+ /* Set signal handling and alarm */
+ if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR)
+ usage_va(_("Cannot catch SIGALRM"));
+
+ /* Parse extra opts if any */
+ argv=np_extra_opts (&argc, argv, progname);
+
+ if (process_arguments (argc, argv) == ERROR)
+ usage_va(_("Could not parse arguments"));
+
+ /* get the command to run */
+ asprintf (&command_line, "%s @%s -p %d %s -t %s %s",
+ PATH_TO_DIG, dns_server, server_port, query_address, record_type, dig_args);
+
+ alarm (timeout_interval);
+ gettimeofday (&tv, NULL);
+
+ if (verbose) {
+ printf ("%s\n", command_line);
+ if(expected_address != NULL) {
+ printf (_("Looking for: '%s'\n"), expected_address);
+ } else {
+ printf (_("Looking for: '%s'\n"), query_address);
+ }
+ }
+
+ /* run the command */
+ if(np_runcmd(command_line, &chld_out, &chld_err, 0) != 0) {
+ result = STATE_WARNING;
+ msg = (char *)_("dig returned an error status");
+ }
+
+ for(i = 0; i < chld_out.lines; i++) {
+ /* the server is responding, we just got the host name... */
+ if (strstr (chld_out.line[i], ";; ANSWER SECTION:")) {
+
+ /* loop through the whole 'ANSWER SECTION' */
+ for(; i < chld_out.lines; i++) {
+ /* get the host address */
+ if (verbose)
+ printf ("%s\n", chld_out.line[i]);
+
+ if (strstr (chld_out.line[i], (expected_address == NULL ? query_address : expected_address)) != NULL) {
+ msg = chld_out.line[i];
+ result = STATE_OK;
+
+ /* Translate output TAB -> SPACE */
+ t = msg;
+ while ((t = strchr(t, '\t')) != NULL) *t = ' ';
+ break;
+ }
+ }
+
+ if (result == STATE_UNKNOWN) {
+ msg = (char *)_("Server not found in ANSWER SECTION");
+ result = STATE_WARNING;
+ }
+
+ /* we found the answer section, so break out of the loop */
+ break;
+ }
+ }
+
+ if (result == STATE_UNKNOWN) {
+ msg = (char *)_("No ANSWER SECTION found");
+ result = STATE_CRITICAL;
+ }
+
+ /* If we get anything on STDERR, at least set warning */
+ if(chld_err.buflen > 0) {
+ result = max_state(result, STATE_WARNING);
+ if(!msg) for(i = 0; i < chld_err.lines; i++) {
+ msg = strchr(chld_err.line[0], ':');
+ if(msg) {
+ msg++;
+ break;
+ }
+ }
+ }
+
+ microsec = deltime (tv);
+ elapsed_time = (double)microsec / 1.0e6;
+
+ if (critical_interval > UNDEFINED && elapsed_time > critical_interval)
+ result = STATE_CRITICAL;
+
+ else if (warning_interval > UNDEFINED && elapsed_time > warning_interval)
+ result = STATE_WARNING;
+
+ printf ("DNS %s - %.3f seconds response time (%s)|%s\n",
+ state_text (result), elapsed_time,
+ msg ? msg : _("Probably a non-existent host/domain"),
+ fperfdata("time", elapsed_time, "s",
+ (warning_interval>UNDEFINED?TRUE:FALSE),
+ warning_interval,
+ (critical_interval>UNDEFINED?TRUE:FALSE),
+ critical_interval,
+ TRUE, 0, FALSE, 0));
+ return result;
}
+
+
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
- int c;
-
- int option_index = 0;
- static struct option long_options[] = {
- {"hostname", required_argument, 0, 'H'},
- {"query_address", required_argument, 0, 'e'},
- {"verbose", no_argument, 0, 'v'},
- {"version", no_argument, 0, 'V'},
- {"help", no_argument, 0, 'h'},
- {0, 0, 0, 0}
- };
-
- if (argc < 2)
- return ERROR;
-
- while (1) {
- c = getopt_long (argc, argv, "hVvt:l:H:", long_options, &option_index);
-
- if (c == -1 || c == EOF)
- break;
-
- switch (c) {
- case '?': /* help */
- usage3 ("Unknown argument", optopt);
- case 'H': /* hostname */
- if (is_host (optarg)) {
- dns_server = optarg;
- }
- else {
- usage ("Invalid host name\n");
- }
- break;
- case 'l': /* username */
- query_address = optarg;
- break;
- case 'v': /* verbose */
- verbose = TRUE;
- break;
- case 't': /* timeout */
- if (is_intnonneg (optarg)) {
- timeout_interval = atoi (optarg);
- }
- else {
- usage ("Time interval must be a nonnegative integer\n");
- }
- break;
- case 'V': /* version */
- print_revision (progname, "$Revision$");
- exit (STATE_OK);
- case 'h': /* help */
- print_help ();
- exit (STATE_OK);
- }
- }
-
- c = optind;
- if (dns_server == NULL) {
- if (c < argc) {
- if (is_host (argv[c])) {
- dns_server = argv[c];
- }
- else {
- usage ("Invalid host name");
- }
- }
- else {
- dns_server = strdup ("127.0.0.1");
- }
- }
-
- return validate_arguments ();
+ int c;
+
+ int option = 0;
+ static struct option longopts[] = {
+ {"hostname", required_argument, 0, 'H'},
+ {"query_address", required_argument, 0, 'l'},
+ {"warning", required_argument, 0, 'w'},
+ {"critical", required_argument, 0, 'c'},
+ {"timeout", required_argument, 0, 't'},
+ {"dig-arguments", required_argument, 0, 'A'},
+ {"verbose", no_argument, 0, 'v'},
+ {"version", no_argument, 0, 'V'},
+ {"help", no_argument, 0, 'h'},
+ {"record_type", required_argument, 0, 'T'},
+ {"expected_address", required_argument, 0, 'a'},
+ {"port", required_argument, 0, 'p'},
+ {0, 0, 0, 0}
+ };
+
+ if (argc < 2)
+ return ERROR;
+
+ while (1) {
+ c = getopt_long (argc, argv, "hVvt:l:H:w:c:T:p:a:A:", longopts, &option);
+
+ if (c == -1 || c == EOF)
+ break;
+
+ switch (c) {
+ case 'h': /* help */
+ print_help ();
+ exit (STATE_OK);
+ case 'V': /* version */
+ print_revision (progname, NP_VERSION);
+ exit (STATE_OK);
+ case 'H': /* hostname */
+ host_or_die(optarg);
+ dns_server = optarg;
+ break;
+ case 'p': /* server port */
+ if (is_intpos (optarg)) {
+ server_port = atoi (optarg);
+ }
+ else {
+ usage_va(_("Port must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 'l': /* address to lookup */
+ query_address = optarg;
+ break;
+ case 'w': /* warning */
+ if (is_nonnegative (optarg)) {
+ warning_interval = strtod (optarg, NULL);
+ }
+ else {
+ usage_va(_("Warning interval must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 'c': /* critical */
+ if (is_nonnegative (optarg)) {
+ critical_interval = strtod (optarg, NULL);
+ }
+ else {
+ usage_va(_("Critical interval must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 't': /* timeout */
+ if (is_intnonneg (optarg)) {
+ timeout_interval = atoi (optarg);
+ }
+ else {
+ usage_va(_("Timeout interval must be a positive integer - %s"), optarg);
+ }
+ break;
+ case 'A': /* dig arguments */
+ dig_args = strdup(optarg);
+ break;
+ case 'v': /* verbose */
+ verbose = TRUE;
+ break;
+ case 'T':
+ record_type = optarg;
+ break;
+ case 'a':
+ expected_address = optarg;
+ break;
+ default: /* usage5 */
+ usage5();
+ }
+ }
+
+ c = optind;
+ if (dns_server == NULL) {
+ if (c < argc) {
+ host_or_die(argv[c]);
+ dns_server = argv[c];
+ }
+ else {
+ dns_server = strdup ("127.0.0.1");
+ }
+ }
+
+ return validate_arguments ();
}
-
-
int
validate_arguments (void)
{
- return OK;
+ if (query_address != NULL)
+ return OK;
+ else
+ return ERROR;
}
-
-
void
print_help (void)
{
- print_revision (progname, revision);
- printf
- ("Copyright (c) %s %s <%s>\n\n%s\n",
- copyright, authors, email, summary);
- print_usage ();
- printf ("\nOptions:\n");
- printf (options, DEFAULT_SOCKET_TIMEOUT);
- support ();
-}
+ char *myport;
+
+ asprintf (&myport, "%d", DEFAULT_PORT);
+ print_revision (progname, NP_VERSION);
+ printf ("Copyright (c) 2000 Karl DeBisschop <kdebisschop@users.sourceforge.net>\n");
+ printf (COPYRIGHT, copyright, email);
+
+ printf (_("This plugin test the DNS service on the specified host using dig"));
+
+ printf ("\n\n");
+
+ print_usage ();
+
+ printf (UT_HELP_VRSN);
+
+ printf (UT_EXTRA_OPTS);
+
+ printf (UT_HOST_PORT, 'p', myport);
+
+ printf (" %s\n","-l, --query_address=STRING");
+ printf (" %s\n",_("Machine name to lookup"));
+ printf (" %s\n","-T, --record_type=STRING");
+ printf (" %s\n",_("Record type to lookup (default: A)"));
+ printf (" %s\n","-a, --expected_address=STRING");
+ printf (" %s\n",_("An address expected to be in the answer section. If not set, uses whatever"));
+ printf (" %s\n",_("was in -l"));
+ printf (" %s\n","-A, --dig-arguments=STRING");
+ printf (" %s\n",_("Pass STRING as argument(s) to dig"));
+ printf (UT_WARN_CRIT);
+ printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+ printf (UT_VERBOSE);
+
+ printf ("\n");
+ printf ("%s\n", _("Examples:"));
+ printf (" %s\n", "check_dig -H DNSSERVER -l www.example.com -A \"+tcp\"");
+ printf (" %s\n", "This will send a tcp query to DNSSERVER for www.example.com");
+
+#ifdef NP_EXTRA_OPTS
+ printf ("\n");
+ printf ("%s\n", _("Notes:"));
+ printf (UT_EXTRA_OPTS_NOTES);
+#endif
+
+ printf (UT_SUPPORT);
+}
void
print_usage (void)
{
- printf ("Usage: %s %s\n", progname, option_summary);
- printf (" %s (-h|--help)\n", progname);
- printf (" %s (-V|--version)\n", progname);
+ printf (_("Usage:"));
+ printf ("%s -l <query_address> [-H <host>] [-p <server port>]\n", progname);
+ printf (" [-T <query type>] [-w <warning interval>] [-c <critical interval>]\n");
+ printf (" [-t <timeout>] [-a <expected answer address>] [-v]\n");
}