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diff --git a/plugins/check_dns.c b/plugins/check_dns.c
index c0ea298278049237e8f86fe9a4690851e2d86052..d96e9bbdc4c3df203b6c130822d393a7bfff3b0f 100644 (file)
--- a/plugins/check_dns.c
+++ b/plugins/check_dns.c
#include "common.h"
#include "popen.h"
#include "utils.h"
+#include "netutils.h"
const char *progname = "check_dns";
-#define REVISION "$Revision$"
-#define COPYRIGHT "2000-2002"
+const char *revision = "$Revision$";
+const char *copyright = "2000-2003";
+const char *email = "nagiosplug-devel@lists.sourceforge.net";
+
+void
+print_usage (void)
+{
+ printf (_("\
+Usage: %s -H host [-s server] [-a expected-address] [-t timeout]\n\
+ %s --help\n\
+ %s --version\n"),
+ progname, progname, progname);
+}
+
+void
+print_help (void)
+{
+ print_revision (progname, revision);
+
+ printf (_(COPYRIGHT), copyright, email);
+
+ print_usage ();
+
+ printf (_(HELP_VRSN));
+
+ printf (_("\
+-H, --hostname=HOST\n\
+ The name or address you want to query\n\
+-s, --server=HOST\n\
+ Optional DNS server you want to use for the lookup\n\
+-a, --expected-address=IP-ADDRESS\n\
+ Optional IP address you expect the DNS server to return\n"));
+
+ printf (_(TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
+
+ printf (_("\n\
+This plugin uses the nslookup program to obtain the IP address\n\
+for the given host/domain query. A optional DNS server to use may\n\
+be specified. If no DNS server is specified, the default server(s)\n\
+specified in /etc/resolv.conf will be used.\n"));
+}
int process_arguments (int, char **);
int validate_arguments (void);
-void print_usage (void);
-void print_help (void);
int error_scan (char *);
#define ADDRESS_LENGTH 256
char *address = NULL;
char *temp_buffer = NULL;
int result = STATE_UNKNOWN;
+ double elapsed_time;
+ struct timeval tv;
+ int multi_address;
/* Set signal handling and alarm */
if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) {
- printf ("Cannot catch SIGALRM");
+ printf (_("Cannot catch SIGALRM"));
return STATE_UNKNOWN;
}
asprintf (&command_line, "%s %s %s", NSLOOKUP_COMMAND, query_address, dns_server);
alarm (timeout_interval);
- time (&start_time);
+ gettimeofday (&tv, NULL);
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);
+ 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);
+ printf (_("Could not open stderr for %s\n"), command_line);
/* scan stdout */
while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
if ((temp_buffer = strstr (input_buffer, "name = ")))
address = strscpy (address, temp_buffer + 7);
else {
- output = strscpy (output, "Unknown error (plugin)");
+ output = strscpy (output, _("Unknown error (plugin)"));
result = STATE_WARNING;
}
}
printf ("%s\n", input_buffer);
if ((temp_buffer = index (input_buffer, ':'))) {
- address = strscpy (address, temp_buffer + 2);
+ temp_buffer++;
+ /* Strip leading spaces */
+ for (; *temp_buffer != '\0' && *temp_buffer == ' '; temp_buffer++)
+ /* NOOP */;
+ address = strdup (temp_buffer);
strip (address);
+ if (address==NULL || strlen(address)==0)
+ terminate (STATE_CRITICAL,
+ _("DNS CRITICAL - '%s' returned empty host name string\n"),
+ NSLOOKUP_COMMAND);
result = STATE_OK;
}
else {
- output = strscpy (output, "Unknown error (plugin)");
+ output = strdup (_("Unknown error (plugin)"));
result = STATE_WARNING;
}
result = error_scan (input_buffer);
if (result != STATE_OK) {
output = strscpy (output, 1 + index (input_buffer, ':'));
+ strip (output);
break;
}
if (error_scan (input_buffer) != STATE_OK) {
result = max_state (result, error_scan (input_buffer));
output = strscpy (output, 1 + index (input_buffer, ':'));
+ strip (output);
}
}
if (spclose (child_process)) {
result = max_state (result, STATE_WARNING);
if (!strcmp (output, ""))
- output = strscpy (output, "nslookup returned error status");
+ output = strscpy (output, _("nslookup returned error status"));
}
+ /* If we got here, we should have an address string,
+ and we can segfault if we do not */
+ if (address==NULL || strlen(address)==0)
+ terminate (STATE_CRITICAL,
+ _("DNS CRITICAL - '%s' output parsing exited with no address\n"),
+ NSLOOKUP_COMMAND);
+
/* compare to expected address */
if (result == STATE_OK && match_expected_address && strcmp(address, expected_address)) {
- result = STATE_CRITICAL;
- asprintf(&output, "expected %s but got %s", expected_address, address);
- }
+ result = STATE_CRITICAL;
+ asprintf(&output, _("expected %s but got %s"), expected_address, address);
+ }
- (void) time (&end_time);
+ elapsed_time = delta_time (tv);
+
+ if (result == STATE_OK) {
+ if (strchr (address, ',') == NULL)
+ multi_address = FALSE;
+ else
+ multi_address = TRUE;
- if (result == STATE_OK)
- printf ("DNS ok - %d seconds response time, Address(es) is/are %s\n",
- (int) (end_time - start_time), address);
+ printf (_("DNS ok - %.3f seconds response time, address%s %s|time=%.3f\n"),
+ elapsed_time, (multi_address==TRUE ? "es are" : " is"), address, elapsed_time);
+ }
else if (result == STATE_WARNING)
- printf ("DNS WARNING - %s\n",
- !strcmp (output, "") ? " Probably a non-existent host/domain" : output);
+ printf (_("DNS WARNING - %s\n"),
+ !strcmp (output, "") ? _(" Probably a non-existent host/domain") : output);
else if (result == STATE_CRITICAL)
- printf ("DNS CRITICAL - %s\n",
- !strcmp (output, "") ? " Probably a non-existent host/domain" : output);
+ printf (_("DNS CRITICAL - %s\n"),
+ !strcmp (output, "") ? _(" Probably a non-existent host/domain") : output);
else
- printf ("DNS problem - %s\n",
- !strcmp (output, "") ? " Probably a non-existent host/domain" : output);
+ printf (_("DNS problem - %s\n"),
+ !strcmp (output, "") ? _(" Probably a non-existent host/domain") : output);
return result;
}
{
/* the DNS lookup timed out */
- if (strstr (input_buffer,
- "Note: nslookup is deprecated and may be removed from future releases.")
- || strstr (input_buffer,
- "Consider using the `dig' or `host' programs instead. Run nslookup with")
- || strstr (input_buffer,
- "the `-sil[ent]' option to prevent this message from appearing."))
+ if (strstr (input_buffer, "Note: nslookup is deprecated and may be removed from future releases.") ||
+ strstr (input_buffer, "Consider using the `dig' or `host' programs instead. Run nslookup with") ||
+ strstr (input_buffer, "the `-sil[ent]' option to prevent this message from appearing."))
return STATE_OK;
/* the DNS lookup timed out */
else if (strstr (input_buffer, "Timed out"))
- return STATE_WARNING;
+ terminate (STATE_WARNING, "Request timed out at server\n");
/* DNS server is not running... */
else if (strstr (input_buffer, "No response from server"))
- return STATE_CRITICAL;
+ terminate (STATE_CRITICAL, "No response from name server %s\n", dns_server);
/* Host name is valid, but server doesn't have records... */
else if (strstr (input_buffer, "No records"))
- return STATE_WARNING;
-
- /* Host or domain name does not exist */
- else if (strstr (input_buffer, "Non-existent"))
- return STATE_CRITICAL;
- else if (strstr (input_buffer, "** server can't find"))
- return STATE_CRITICAL;
- else if(strstr(input_buffer,"NXDOMAIN")) /* 9.x */
- return STATE_CRITICAL;
+ terminate (STATE_CRITICAL, "Name server %s has no records\n", dns_server);
/* Connection was refused */
- else if (strstr (input_buffer, "Connection refused"))
- return STATE_CRITICAL;
+ else if (strstr (input_buffer, "Connection refused") ||
+ (strstr (input_buffer, "** server can't find") &&
+ strstr (input_buffer, ": REFUSED")) ||
+ (strstr (input_buffer, "Refused")))
+ terminate (STATE_CRITICAL, "Connection to name server %s was refused\n", dns_server);
+
+ /* Host or domain name does not exist */
+ else if (strstr (input_buffer, "Non-existent") ||
+ strstr (input_buffer, "** server can't find") ||
+ strstr (input_buffer,"NXDOMAIN"))
+ terminate (STATE_CRITICAL, "Domain %s was not found by the server\n", query_address);
/* Network is unreachable */
else if (strstr (input_buffer, "Network is unreachable"))
- return STATE_CRITICAL;
+ terminate (STATE_CRITICAL, "Network is unreachable\n");
/* Internal server failure */
else if (strstr (input_buffer, "Server failure"))
- return STATE_CRITICAL;
-
- /* DNS server refused to service request */
- else if (strstr (input_buffer, "Refused"))
- return STATE_CRITICAL;
+ terminate (STATE_CRITICAL, "Server failure for %s\n", dns_server);
/* Request error */
else if (strstr (input_buffer, "Format error"))
- return STATE_WARNING;
+ terminate (STATE_WARNING, "Format error\n");
- else
- return STATE_OK;
+ return STATE_OK;
}
{
int c;
-#ifdef HAVE_GETOPT_H
int opt_index = 0;
static struct option long_opts[] = {
{"help", no_argument, 0, 'h'},
{"expected-address", required_argument, 0, 'a'},
{0, 0, 0, 0}
};
-#endif
if (argc < 2)
return ERROR;
strcpy (argv[c], "-t");
while (1) {
-#ifdef HAVE_GETOPT_H
c = getopt_long (argc, argv, "hVvt:H:s:r:a:", long_opts, &opt_index);
-#else
- c = getopt (argc, argv, "hVvt:H:s:r:a:");
-#endif
if (c == -1 || c == EOF)
break;
switch (c) {
case '?': /* args not parsable */
- printf ("%s: Unknown argument: %s\n\n", progname, optarg);
+ printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
print_usage ();
exit (STATE_UNKNOWN);
case 'h': /* help */
print_help ();
exit (STATE_OK);
case 'V': /* version */
- print_revision (progname, REVISION);
+ print_revision (progname, revision);
exit (STATE_OK);
case 'v': /* version */
verbose = TRUE;
timeout_interval = atoi (optarg);
break;
case 'H': /* hostname */
- if (is_host (optarg) == FALSE) {
- printf ("Invalid host name/address\n\n");
- print_usage ();
- exit (STATE_UNKNOWN);
- }
if (strlen (optarg) >= ADDRESS_LENGTH)
- terminate (STATE_UNKNOWN, "Input buffer overflow\n");
+ terminate (STATE_UNKNOWN, _("Input buffer overflow\n"));
strcpy (query_address, optarg);
break;
case 's': /* server name */
+ /* TODO: this is_host check is probably unnecessary. Better to confirm nslookup
+ response matches */
if (is_host (optarg) == FALSE) {
- printf ("Invalid server name/address\n\n");
+ printf (_("Invalid server name/address\n\n"));
print_usage ();
exit (STATE_UNKNOWN);
}
if (strlen (optarg) >= ADDRESS_LENGTH)
- terminate (STATE_UNKNOWN, "Input buffer overflow\n");
+ terminate (STATE_UNKNOWN, _("Input buffer overflow\n"));
strcpy (dns_server, optarg);
break;
case 'r': /* reverse server name */
+ /* TODO: Is this is_host necessary? */
if (is_host (optarg) == FALSE) {
- printf ("Invalid host name/address\n\n");
+ printf (_("Invalid host name/address\n\n"));
print_usage ();
exit (STATE_UNKNOWN);
}
if (strlen (optarg) >= ADDRESS_LENGTH)
- terminate (STATE_UNKNOWN, "Input buffer overflow\n");
+ terminate (STATE_UNKNOWN, _("Input buffer overflow\n"));
strcpy (ptr_server, optarg);
break;
case 'a': /* expected address */
- if (is_dotted_quad (optarg) == FALSE) {
- printf ("Invalid expected address\n\n");
- print_usage ();
- exit (STATE_UNKNOWN);
- }
if (strlen (optarg) >= ADDRESS_LENGTH)
- terminate (STATE_UNKNOWN, "Input buffer overflow\n");
+ terminate (STATE_UNKNOWN, _("Input buffer overflow\n"));
strcpy (expected_address, optarg);
match_expected_address = TRUE;
break;
c = optind;
if (strlen(query_address)==0 && c<argc) {
- if (is_host(argv[c])==FALSE) {
- printf ("Invalid name/address: %s\n\n", argv[c]);
- return ERROR;
- }
if (strlen(argv[c])>=ADDRESS_LENGTH)
- terminate (STATE_UNKNOWN, "Input buffer overflow\n");
+ terminate (STATE_UNKNOWN, _("Input buffer overflow\n"));
strcpy (query_address, argv[c++]);
}
if (strlen(dns_server)==0 && c<argc) {
+ /* TODO: See -s option */
if (is_host(argv[c]) == FALSE) {
- printf ("Invalid name/address: %s\n\n", argv[c]);
+ printf (_("Invalid name/address: %s\n\n"), argv[c]);
return ERROR;
}
if (strlen(argv[c]) >= ADDRESS_LENGTH)
- terminate (STATE_UNKNOWN, "Input buffer overflow\n");
+ terminate (STATE_UNKNOWN, _("Input buffer overflow\n"));
strcpy (dns_server, argv[c++]);
}
else
return OK;
}
-
-void
-print_usage (void)
-{
- printf ("Usage: %s -H host [-s server] [-a expected-address] [-t timeout]\n" " %s --help\n"
- " %s --version\n", progname, progname, progname);
-}
-
-void
-print_help (void)
-{
- print_revision (progname, REVISION);
- printf ("Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)\n\n");
- print_usage ();
- printf
- ("\nOptions:\n"
- "-H, --hostname=HOST\n"
- " The name or address you want to query\n"
- "-s, --server=HOST\n"
- " Optional DNS server you want to use for the lookup\n"
- "-a, --expected-address=IP-ADDRESS\n"
- " Optional IP address you expect the DNS server to return\n"
- "-t, --timeout=INTEGER\n"
- " Seconds before connection times out (default: %d)\n"
- "-h, --help\n"
- " Print detailed help\n"
- "-V, --version\n"
- " Print version numbers and license information\n"
- "\n"
- "This plugin uses the nslookup program to obtain the IP address\n"
- "for the given host/domain query. A optional DNS server to use may\n"
- "be specified. If no DNS server is specified, the default server(s)\n"
- "specified in /etc/resolv.conf will be used.\n", DEFAULT_SOCKET_TIMEOUT);
-}