From 499c0a07ae42ef48b3a1f25031fb933c3c59e327 Mon Sep 17 00:00:00 2001
From: RincewindsHat <12514511+RincewindsHat@users.noreply.github.com>
Date: Thu, 31 Oct 2024 03:29:32 +0100
Subject: check_dns: clang-format
---
plugins/check_dns.c | 1067 ++++++++++++++++++++++++---------------------------
1 file changed, 509 insertions(+), 558 deletions(-)
(limited to 'plugins')
diff --git a/plugins/check_dns.c b/plugins/check_dns.c
index 468bc958..7cd23162 100644
--- a/plugins/check_dns.c
+++ b/plugins/check_dns.c
@@ -1,33 +1,33 @@
/*****************************************************************************
-*
-* Monitoring check_dns plugin
-*
-* License: GPL
-* Copyright (c) 2000-2008 Monitoring Plugins Development Team
-*
-* Description:
-*
-* This file contains the check_dns plugin
-*
-* LIMITATION: nslookup on Solaris 7 can return output over 2 lines, which
-* will not be picked up by this 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 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 .
-*
-*
-*****************************************************************************/
+ *
+ * Monitoring check_dns plugin
+ *
+ * License: GPL
+ * Copyright (c) 2000-2008 Monitoring Plugins Development Team
+ *
+ * Description:
+ *
+ * This file contains the check_dns plugin
+ *
+ * LIMITATION: nslookup on Solaris 7 can return output over 2 lines, which
+ * will not be picked up by this 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 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 .
+ *
+ *
+ *****************************************************************************/
const char *progname = "check_dns";
const char *copyright = "2000-2008";
@@ -39,13 +39,13 @@ const char *email = "devel@monitoring-plugins.org";
#include "netutils.h"
#include "runcmd.h"
-int process_arguments (int, char **);
-int validate_arguments (void);
-int error_scan (char *, bool *);
+int process_arguments(int, char **);
+int validate_arguments(void);
+int error_scan(char *, bool *);
bool ip_match_cidr(const char *, const char *);
unsigned long ip2long(const char *);
-void print_help (void);
-void print_usage (void);
+void print_help(void);
+void print_usage(void);
#define ADDRESS_LENGTH 256
char query_address[ADDRESS_LENGTH] = "";
@@ -60,558 +60,509 @@ bool expect_authority = false;
bool all_match = false;
thresholds *time_thresholds = NULL;
-static int
-qstrcmp(const void *p1, const void *p2)
-{
+static int qstrcmp(const void *p1, const void *p2) {
/* The actual arguments to this function are "pointers to
pointers to char", but strcmp() arguments are "pointers
to char", hence the following cast plus dereference */
- return strcmp(* (char * const *) p1, * (char * const *) p2);
+ return strcmp(*(char *const *)p1, *(char *const *)p2);
}
+int main(int argc, char **argv) {
+ char *command_line = NULL;
+ char input_buffer[MAX_INPUT_BUFFER];
+ char *address = NULL; /* comma separated str with addrs/ptrs (sorted) */
+ char **addresses = NULL;
+ int n_addresses = 0;
+ char *msg = NULL;
+ char *temp_buffer = NULL;
+ bool non_authoritative = false;
+ int result = STATE_UNKNOWN;
+ double elapsed_time;
+ long microsec;
+ struct timeval tv;
+ bool parse_address = false; /* This flag scans for Address: but only after Name: */
+ output chld_out, chld_err;
+ bool is_nxdomain = false;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+
+ /* Set signal handling and alarm */
+ if (signal(SIGALRM, runcmd_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 */
+ xasprintf(&command_line, "%s %s %s", NSLOOKUP_COMMAND, query_address, dns_server);
+
+ alarm(timeout_interval);
+ gettimeofday(&tv, NULL);
+
+ if (verbose)
+ printf("%s\n", command_line);
+
+ /* run the command */
+ if ((np_runcmd(command_line, &chld_out, &chld_err, 0)) != 0) {
+ msg = (char *)_("nslookup returned an error status");
+ result = STATE_WARNING;
+ }
+
+ /* scan stdout */
+ for (size_t i = 0; i < chld_out.lines; i++) {
+ if (addresses == NULL)
+ addresses = malloc(sizeof(*addresses) * 10);
+ else if (!(n_addresses % 10))
+ addresses = realloc(addresses, sizeof(*addresses) * (n_addresses + 10));
+
+ if (verbose)
+ puts(chld_out.line[i]);
+
+ if (strcasestr(chld_out.line[i], ".in-addr.arpa") || strcasestr(chld_out.line[i], ".ip6.arpa")) {
+ if ((temp_buffer = strstr(chld_out.line[i], "name = ")))
+ addresses[n_addresses++] = strdup(temp_buffer + 7);
+ else {
+ msg = (char *)_("Warning plugin error");
+ result = STATE_WARNING;
+ }
+ }
+
+ /* bug ID: 2946553 - Older versions of bind will use all available dns
+ servers, we have to match the one specified */
+ if (strstr(chld_out.line[i], "Server:") && strlen(dns_server) > 0) {
+ temp_buffer = strchr(chld_out.line[i], ':');
+ temp_buffer++;
+
+ /* Strip leading tabs */
+ for (; *temp_buffer != '\0' && *temp_buffer == '\t'; temp_buffer++)
+ /* NOOP */;
+
+ strip(temp_buffer);
+ if (temp_buffer == NULL || strlen(temp_buffer) == 0) {
+ die(STATE_CRITICAL, _("DNS CRITICAL - '%s' returned empty server string\n"), NSLOOKUP_COMMAND);
+ }
+
+ if (strcmp(temp_buffer, dns_server) != 0) {
+ die(STATE_CRITICAL, _("DNS CRITICAL - No response from DNS %s\n"), dns_server);
+ }
+ }
+
+ /* the server is responding, we just got the host name... */
+ if (strstr(chld_out.line[i], "Name:"))
+ parse_address = true;
+ else if (parse_address && (strstr(chld_out.line[i], "Address:") || strstr(chld_out.line[i], "Addresses:"))) {
+ temp_buffer = index(chld_out.line[i], ':');
+ temp_buffer++;
+
+ /* Strip leading spaces */
+ while (*temp_buffer == ' ')
+ temp_buffer++;
+
+ strip(temp_buffer);
+ if (temp_buffer == NULL || strlen(temp_buffer) == 0) {
+ die(STATE_CRITICAL, _("DNS CRITICAL - '%s' returned empty host name string\n"), NSLOOKUP_COMMAND);
+ }
+
+ addresses[n_addresses++] = strdup(temp_buffer);
+ } else if (strstr(chld_out.line[i], _("Non-authoritative answer:"))) {
+ non_authoritative = true;
+ }
+
+ result = error_scan(chld_out.line[i], &is_nxdomain);
+ if (result != STATE_OK) {
+ msg = strchr(chld_out.line[i], ':');
+ if (msg)
+ msg++;
+ break;
+ }
+ }
+
+ /* scan stderr */
+ for (size_t i = 0; i < chld_err.lines; i++) {
+ if (verbose)
+ puts(chld_err.line[i]);
+
+ if (error_scan(chld_err.line[i], &is_nxdomain) != STATE_OK) {
+ result = max_state(result, error_scan(chld_err.line[i], &is_nxdomain));
+ msg = strchr(input_buffer, ':');
+ if (msg)
+ msg++;
+ else
+ msg = input_buffer;
+ }
+ }
+
+ if (is_nxdomain && !expect_nxdomain) {
+ die(STATE_CRITICAL, _("Domain '%s' was not found by the server\n"), query_address);
+ }
-int
-main (int argc, char **argv)
-{
- char *command_line = NULL;
- char input_buffer[MAX_INPUT_BUFFER];
- char *address = NULL; /* comma separated str with addrs/ptrs (sorted) */
- char **addresses = NULL;
- int n_addresses = 0;
- char *msg = NULL;
- char *temp_buffer = NULL;
- bool non_authoritative = false;
- int result = STATE_UNKNOWN;
- double elapsed_time;
- long microsec;
- struct timeval tv;
- bool parse_address = false; /* This flag scans for Address: but only after Name: */
- output chld_out, chld_err;
- bool is_nxdomain = false;
-
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- /* Set signal handling and alarm */
- if (signal (SIGALRM, runcmd_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 */
- xasprintf (&command_line, "%s %s %s", NSLOOKUP_COMMAND, query_address, dns_server);
-
- alarm (timeout_interval);
- gettimeofday (&tv, NULL);
-
- if (verbose)
- printf ("%s\n", command_line);
-
- /* run the command */
- if((np_runcmd(command_line, &chld_out, &chld_err, 0)) != 0) {
- msg = (char *)_("nslookup returned an error status");
- result = STATE_WARNING;
- }
-
- /* scan stdout */
- for(size_t i = 0; i < chld_out.lines; i++) {
- if (addresses == NULL)
- addresses = malloc(sizeof(*addresses)*10);
- else if (!(n_addresses % 10))
- addresses = realloc(addresses,sizeof(*addresses) * (n_addresses + 10));
-
- if (verbose)
- puts(chld_out.line[i]);
-
- if (strcasestr (chld_out.line[i], ".in-addr.arpa") || strcasestr (chld_out.line[i], ".ip6.arpa")) {
- if ((temp_buffer = strstr (chld_out.line[i], "name = ")))
- addresses[n_addresses++] = strdup (temp_buffer + 7);
- else {
- msg = (char *)_("Warning plugin error");
- result = STATE_WARNING;
- }
- }
-
- /* bug ID: 2946553 - Older versions of bind will use all available dns
- servers, we have to match the one specified */
- if (strstr (chld_out.line[i], "Server:") && strlen(dns_server) > 0) {
- temp_buffer = strchr (chld_out.line[i], ':');
- temp_buffer++;
-
- /* Strip leading tabs */
- for (; *temp_buffer != '\0' && *temp_buffer == '\t'; temp_buffer++)
- /* NOOP */;
-
- strip(temp_buffer);
- if (temp_buffer==NULL || strlen(temp_buffer)==0) {
- die (STATE_CRITICAL,
- _("DNS CRITICAL - '%s' returned empty server string\n"),
- NSLOOKUP_COMMAND);
- }
-
- if (strcmp(temp_buffer, dns_server) != 0) {
- die (STATE_CRITICAL, _("DNS CRITICAL - No response from DNS %s\n"), dns_server);
- }
- }
-
- /* the server is responding, we just got the host name... */
- if (strstr (chld_out.line[i], "Name:"))
- parse_address = true;
- else if (parse_address && (strstr (chld_out.line[i], "Address:") ||
- strstr (chld_out.line[i], "Addresses:"))) {
- temp_buffer = index (chld_out.line[i], ':');
- temp_buffer++;
-
- /* Strip leading spaces */
- while (*temp_buffer == ' ')
- temp_buffer++;
-
- strip(temp_buffer);
- if (temp_buffer==NULL || strlen(temp_buffer)==0) {
- die (STATE_CRITICAL,
- _("DNS CRITICAL - '%s' returned empty host name string\n"),
- NSLOOKUP_COMMAND);
- }
-
- addresses[n_addresses++] = strdup(temp_buffer);
- }
- else if (strstr (chld_out.line[i], _("Non-authoritative answer:"))) {
- non_authoritative = true;
- }
-
-
- result = error_scan (chld_out.line[i], &is_nxdomain);
- if (result != STATE_OK) {
- msg = strchr (chld_out.line[i], ':');
- if(msg) msg++;
- break;
- }
- }
-
- /* scan stderr */
- for(size_t i = 0; i < chld_err.lines; i++) {
- if (verbose)
- puts(chld_err.line[i]);
-
- if (error_scan (chld_err.line[i], &is_nxdomain) != STATE_OK) {
- result = max_state (result, error_scan (chld_err.line[i], &is_nxdomain));
- msg = strchr(input_buffer, ':');
- if(msg)
- msg++;
- else
- msg = input_buffer;
- }
- }
-
- if (is_nxdomain && !expect_nxdomain) {
- die (STATE_CRITICAL, _("Domain '%s' was not found by the server\n"), query_address);
- }
-
- if (addresses) {
- int i,slen;
- char *adrp;
- qsort(addresses, n_addresses, sizeof(*addresses), qstrcmp);
- for(i=0, slen=1; i < n_addresses; i++) {
- slen += strlen(addresses[i])+1;
- }
- adrp = address = malloc(slen);
- for(i=0; i < n_addresses; i++) {
- if (i) *adrp++ = ',';
- strcpy(adrp, addresses[i]);
- adrp += strlen(addresses[i]);
- }
- *adrp = 0;
- } else
- die (STATE_CRITICAL,
- _("DNS CRITICAL - '%s' msg parsing exited with no address\n"),
- NSLOOKUP_COMMAND);
-
- /* compare to expected address */
- if (result == STATE_OK && expected_address_cnt > 0) {
- result = STATE_CRITICAL;
- temp_buffer = "";
- unsigned long expect_match = (1 << expected_address_cnt) - 1;
- unsigned long addr_match = (1 << n_addresses) - 1;
-
- for (int i=0; iwarning != NULL) && (time_thresholds->critical != NULL)) {
- printf ("|%s\n", fperfdata ("time", elapsed_time, "s",
- true, time_thresholds->warning->end,
- true, time_thresholds->critical->end,
- true, 0, false, 0));
- } else if ((time_thresholds->warning == NULL) && (time_thresholds->critical != NULL)) {
- printf ("|%s\n", fperfdata ("time", elapsed_time, "s",
- false, 0,
- true, time_thresholds->critical->end,
- true, 0, false, 0));
- } else if ((time_thresholds->warning != NULL) && (time_thresholds->critical == NULL)) {
- printf ("|%s\n", fperfdata ("time", elapsed_time, "s",
- true, time_thresholds->warning->end,
- false, 0,
- true, 0, false, 0));
- } else
- printf ("|%s\n", fperfdata ("time", elapsed_time, "s", false, 0, false, 0, true, 0, false, 0));
- }
- else if (result == STATE_WARNING)
- printf (_("DNS WARNING - %s\n"),
- !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg);
- else if (result == STATE_CRITICAL)
- printf (_("DNS CRITICAL - %s\n"),
- !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg);
- else
- printf (_("DNS UNKNOWN - %s\n"),
- !strcmp (msg, "") ? _(" Probably a non-existent host/domain") : msg);
-
- return result;
+ if (addresses) {
+ int i, slen;
+ char *adrp;
+ qsort(addresses, n_addresses, sizeof(*addresses), qstrcmp);
+ for (i = 0, slen = 1; i < n_addresses; i++) {
+ slen += strlen(addresses[i]) + 1;
+ }
+ adrp = address = malloc(slen);
+ for (i = 0; i < n_addresses; i++) {
+ if (i)
+ *adrp++ = ',';
+ strcpy(adrp, addresses[i]);
+ adrp += strlen(addresses[i]);
+ }
+ *adrp = 0;
+ } else
+ die(STATE_CRITICAL, _("DNS CRITICAL - '%s' msg parsing exited with no address\n"), NSLOOKUP_COMMAND);
+
+ /* compare to expected address */
+ if (result == STATE_OK && expected_address_cnt > 0) {
+ result = STATE_CRITICAL;
+ temp_buffer = "";
+ unsigned long expect_match = (1 << expected_address_cnt) - 1;
+ unsigned long addr_match = (1 << n_addresses) - 1;
+
+ for (int i = 0; i < expected_address_cnt; i++) {
+ int j;
+ /* check if we get a match on 'raw' ip or cidr */
+ for (j = 0; j < n_addresses; j++) {
+ if (strcmp(addresses[j], expected_address[i]) == 0 || ip_match_cidr(addresses[j], expected_address[i])) {
+ result = STATE_OK;
+ addr_match &= ~(1 << j);
+ expect_match &= ~(1 << i);
+ }
+ }
+
+ /* prepare an error string */
+ xasprintf(&temp_buffer, "%s%s; ", temp_buffer, expected_address[i]);
+ }
+ /* check if expected_address must cover all in addresses and none may be missing */
+ if (all_match && (expect_match != 0 || addr_match != 0))
+ result = STATE_CRITICAL;
+ if (result == STATE_CRITICAL) {
+ /* Strip off last semicolon... */
+ temp_buffer[strlen(temp_buffer) - 2] = '\0';
+ xasprintf(&msg, _("expected '%s' but got '%s'"), temp_buffer, address);
+ }
+ }
+
+ if (expect_nxdomain) {
+ if (!is_nxdomain) {
+ result = STATE_CRITICAL;
+ xasprintf(&msg, _("Domain '%s' was found by the server: '%s'\n"), query_address, address);
+ } else {
+ if (address != NULL)
+ free(address);
+ address = "NXDOMAIN";
+ }
+ }
+
+ /* check if authoritative */
+ if (result == STATE_OK && expect_authority && non_authoritative) {
+ result = STATE_CRITICAL;
+ xasprintf(&msg, _("server %s is not authoritative for %s"), dns_server, query_address);
+ }
+
+ microsec = deltime(tv);
+ elapsed_time = (double)microsec / 1.0e6;
+
+ if (result == STATE_OK) {
+ result = get_status(elapsed_time, time_thresholds);
+ if (result == STATE_OK) {
+ printf("DNS %s: ", _("OK"));
+ } else if (result == STATE_WARNING) {
+ printf("DNS %s: ", _("WARNING"));
+ } else if (result == STATE_CRITICAL) {
+ printf("DNS %s: ", _("CRITICAL"));
+ }
+ printf(ngettext("%.3f second response time", "%.3f seconds response time", elapsed_time), elapsed_time);
+ printf(_(". %s returns %s"), query_address, address);
+ if ((time_thresholds->warning != NULL) && (time_thresholds->critical != NULL)) {
+ printf("|%s\n", fperfdata("time", elapsed_time, "s", true, time_thresholds->warning->end, true, time_thresholds->critical->end,
+ true, 0, false, 0));
+ } else if ((time_thresholds->warning == NULL) && (time_thresholds->critical != NULL)) {
+ printf("|%s\n", fperfdata("time", elapsed_time, "s", false, 0, true, time_thresholds->critical->end, true, 0, false, 0));
+ } else if ((time_thresholds->warning != NULL) && (time_thresholds->critical == NULL)) {
+ printf("|%s\n", fperfdata("time", elapsed_time, "s", true, time_thresholds->warning->end, false, 0, true, 0, false, 0));
+ } else
+ printf("|%s\n", fperfdata("time", elapsed_time, "s", false, 0, false, 0, true, 0, false, 0));
+ } else if (result == STATE_WARNING)
+ printf(_("DNS WARNING - %s\n"), !strcmp(msg, "") ? _(" Probably a non-existent host/domain") : msg);
+ else if (result == STATE_CRITICAL)
+ printf(_("DNS CRITICAL - %s\n"), !strcmp(msg, "") ? _(" Probably a non-existent host/domain") : msg);
+ else
+ printf(_("DNS UNKNOWN - %s\n"), !strcmp(msg, "") ? _(" Probably a non-existent host/domain") : msg);
+
+ return result;
}
bool ip_match_cidr(const char *addr, const char *cidr_ro) {
- char *subnet, *mask_c, *cidr = strdup(cidr_ro);
- int mask;
- subnet = strtok(cidr, "/");
- mask_c = strtok(NULL, "\0");
- if (!subnet || !mask_c) {
- return false;
+ char *subnet, *mask_c, *cidr = strdup(cidr_ro);
+ int mask;
+ subnet = strtok(cidr, "/");
+ mask_c = strtok(NULL, "\0");
+ if (!subnet || !mask_c) {
+ return false;
}
- mask = atoi(mask_c);
+ mask = atoi(mask_c);
- /* https://www.cryptobells.com/verifying-ips-in-a-subnet-in-php/ */
- return (ip2long(addr) & ~((1 << (32 - mask)) - 1)) == (ip2long(subnet) >> (32 - mask)) << (32 - mask);
+ /* https://www.cryptobells.com/verifying-ips-in-a-subnet-in-php/ */
+ return (ip2long(addr) & ~((1 << (32 - mask)) - 1)) == (ip2long(subnet) >> (32 - mask)) << (32 - mask);
}
-unsigned long
-ip2long(const char* src) {
- unsigned long ip[4];
- /* http://computer-programming-forum.com/47-c-language/1376ffb92a12c471.htm */
- return (sscanf(src, "%3lu.%3lu.%3lu.%3lu",
- &ip[0], &ip[1], &ip[2], &ip[3]) == 4 &&
- ip[0] < 256 && ip[1] < 256 &&
- ip[2] < 256 && ip[3] < 256)
- ? ip[0] << 24 | ip[1] << 16 | ip[2] << 8 | ip[3]
- : 0;
+unsigned long ip2long(const char *src) {
+ unsigned long ip[4];
+ /* http://computer-programming-forum.com/47-c-language/1376ffb92a12c471.htm */
+ return (sscanf(src, "%3lu.%3lu.%3lu.%3lu", &ip[0], &ip[1], &ip[2], &ip[3]) == 4 && ip[0] < 256 && ip[1] < 256 && ip[2] < 256 &&
+ ip[3] < 256)
+ ? ip[0] << 24 | ip[1] << 16 | ip[2] << 8 | ip[3]
+ : 0;
}
-int
-error_scan (char *input_buffer, bool *is_nxdomain)
-{
-
- const int nxdomain = strstr (input_buffer, "Non-existent") ||
- strstr (input_buffer, "** server can't find") ||
- strstr (input_buffer, "** Can't find") ||
- strstr (input_buffer, "NXDOMAIN");
- if (nxdomain) *is_nxdomain = true;
-
- /* 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.")))
- return STATE_OK;
-
- /* DNS server is not running... */
- else if (strstr (input_buffer, "No response from server"))
- die (STATE_CRITICAL, _("No response from DNS %s\n"), dns_server);
- else if (strstr (input_buffer, "no servers could be reached"))
- die (STATE_CRITICAL, _("No response from DNS %s\n"), dns_server);
-
- /* Host name is valid, but server doesn't have records... */
- else if (strstr (input_buffer, "No records"))
- die (STATE_CRITICAL, _("DNS %s has no records\n"), dns_server);
-
- /* Connection was refused */
- else if (strstr (input_buffer, "Connection refused") ||
- strstr (input_buffer, "Couldn't find server") ||
- strstr (input_buffer, "Refused") ||
- (strstr (input_buffer, "** server can't find") &&
- strstr (input_buffer, ": REFUSED")))
- die (STATE_CRITICAL, _("Connection to DNS %s was refused\n"), dns_server);
-
- /* Query refused (usually by an ACL in the namserver) */
- else if (strstr (input_buffer, "Query refused"))
- die (STATE_CRITICAL, _("Query was refused by DNS server at %s\n"), dns_server);
-
- /* No information (e.g. nameserver IP has two PTR records) */
- else if (strstr (input_buffer, "No information"))
- die (STATE_CRITICAL, _("No information returned by DNS server at %s\n"), dns_server);
-
- /* Network is unreachable */
- else if (strstr (input_buffer, "Network is unreachable"))
- die (STATE_CRITICAL, _("Network is unreachable\n"));
-
- /* Internal server failure */
- else if (strstr (input_buffer, "Server failure"))
- die (STATE_CRITICAL, _("DNS failure for %s\n"), dns_server);
-
- /* Request error or the DNS lookup timed out */
- else if (strstr (input_buffer, "Format error") ||
- strstr (input_buffer, "Timed out"))
- return STATE_WARNING;
-
- return STATE_OK;
+int error_scan(char *input_buffer, bool *is_nxdomain) {
-}
+ const int nxdomain = strstr(input_buffer, "Non-existent") || strstr(input_buffer, "** server can't find") ||
+ strstr(input_buffer, "** Can't find") || strstr(input_buffer, "NXDOMAIN");
+ if (nxdomain)
+ *is_nxdomain = true;
+
+ /* 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.")))
+ return STATE_OK;
+
+ /* DNS server is not running... */
+ else if (strstr(input_buffer, "No response from server"))
+ die(STATE_CRITICAL, _("No response from DNS %s\n"), dns_server);
+ else if (strstr(input_buffer, "no servers could be reached"))
+ die(STATE_CRITICAL, _("No response from DNS %s\n"), dns_server);
+
+ /* Host name is valid, but server doesn't have records... */
+ else if (strstr(input_buffer, "No records"))
+ die(STATE_CRITICAL, _("DNS %s has no records\n"), dns_server);
+
+ /* Connection was refused */
+ else if (strstr(input_buffer, "Connection refused") || strstr(input_buffer, "Couldn't find server") ||
+ strstr(input_buffer, "Refused") || (strstr(input_buffer, "** server can't find") && strstr(input_buffer, ": REFUSED")))
+ die(STATE_CRITICAL, _("Connection to DNS %s was refused\n"), dns_server);
+
+ /* Query refused (usually by an ACL in the namserver) */
+ else if (strstr(input_buffer, "Query refused"))
+ die(STATE_CRITICAL, _("Query was refused by DNS server at %s\n"), dns_server);
+
+ /* No information (e.g. nameserver IP has two PTR records) */
+ else if (strstr(input_buffer, "No information"))
+ die(STATE_CRITICAL, _("No information returned by DNS server at %s\n"), dns_server);
+
+ /* Network is unreachable */
+ else if (strstr(input_buffer, "Network is unreachable"))
+ die(STATE_CRITICAL, _("Network is unreachable\n"));
+
+ /* Internal server failure */
+ else if (strstr(input_buffer, "Server failure"))
+ die(STATE_CRITICAL, _("DNS failure for %s\n"), dns_server);
+ /* Request error or the DNS lookup timed out */
+ else if (strstr(input_buffer, "Format error") || strstr(input_buffer, "Timed out"))
+ return STATE_WARNING;
+
+ return STATE_OK;
+}
/* process command-line arguments */
-int
-process_arguments (int argc, char **argv)
-{
- int c;
- char *warning = NULL;
- char *critical = NULL;
-
- int opt_index = 0;
- static struct option long_opts[] = {
- {"help", no_argument, 0, 'h'},
- {"version", no_argument, 0, 'V'},
- {"verbose", no_argument, 0, 'v'},
- {"timeout", required_argument, 0, 't'},
- {"hostname", required_argument, 0, 'H'},
- {"server", required_argument, 0, 's'},
- {"reverse-server", required_argument, 0, 'r'},
- {"expected-address", required_argument, 0, 'a'},
- {"expect-nxdomain", no_argument, 0, 'n'},
- {"expect-authority", no_argument, 0, 'A'},
- {"all", no_argument, 0, 'L'},
- {"warning", required_argument, 0, 'w'},
- {"critical", required_argument, 0, 'c'},
- {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");
-
- while (1) {
- c = getopt_long (argc, argv, "hVvALnt:H:s:r:a:w:c:", long_opts, &opt_index);
-
- if (c == -1 || c == EOF)
- break;
-
- switch (c) {
- case 'h': /* help */
- print_help ();
- exit (STATE_UNKNOWN);
- case 'V': /* version */
- print_revision (progname, NP_VERSION);
- exit (STATE_UNKNOWN);
- case 'v': /* version */
- verbose = true;
- break;
- case 't': /* timeout period */
- timeout_interval = atoi (optarg);
- break;
- case 'H': /* hostname */
- if (strlen (optarg) >= ADDRESS_LENGTH)
- die (STATE_UNKNOWN, _("Input buffer overflow\n"));
- strcpy (query_address, optarg);
- break;
- case 's': /* server name */
- /* TODO: this host_or_die check is probably unnecessary.
- * Better to confirm nslookup response matches */
- host_or_die(optarg);
- if (strlen (optarg) >= ADDRESS_LENGTH)
- die (STATE_UNKNOWN, _("Input buffer overflow\n"));
- strcpy (dns_server, optarg);
- break;
- case 'r': /* reverse server name */
- /* TODO: Is this host_or_die necessary? */
- host_or_die(optarg);
- if (strlen (optarg) >= ADDRESS_LENGTH)
- die (STATE_UNKNOWN, _("Input buffer overflow\n"));
- strcpy (ptr_server, optarg);
- break;
- case 'a': /* expected address */
- if (strlen (optarg) >= ADDRESS_LENGTH)
- die (STATE_UNKNOWN, _("Input buffer overflow\n"));
- if (strchr(optarg, ',') != NULL) {
- char *comma = strchr(optarg, ',');
- while (comma != NULL) {
- expected_address = (char **)realloc(expected_address, (expected_address_cnt+1) * sizeof(char**));
- expected_address[expected_address_cnt] = strndup(optarg, comma - optarg);
- expected_address_cnt++;
- optarg = comma + 1;
- comma = strchr(optarg, ',');
+int process_arguments(int argc, char **argv) {
+ int c;
+ char *warning = NULL;
+ char *critical = NULL;
+
+ int opt_index = 0;
+ static struct option long_opts[] = {{"help", no_argument, 0, 'h'},
+ {"version", no_argument, 0, 'V'},
+ {"verbose", no_argument, 0, 'v'},
+ {"timeout", required_argument, 0, 't'},
+ {"hostname", required_argument, 0, 'H'},
+ {"server", required_argument, 0, 's'},
+ {"reverse-server", required_argument, 0, 'r'},
+ {"expected-address", required_argument, 0, 'a'},
+ {"expect-nxdomain", no_argument, 0, 'n'},
+ {"expect-authority", no_argument, 0, 'A'},
+ {"all", no_argument, 0, 'L'},
+ {"warning", required_argument, 0, 'w'},
+ {"critical", required_argument, 0, 'c'},
+ {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");
+
+ while (1) {
+ c = getopt_long(argc, argv, "hVvALnt:H:s:r:a:w:c:", long_opts, &opt_index);
+
+ if (c == -1 || c == EOF)
+ break;
+
+ switch (c) {
+ case 'h': /* help */
+ print_help();
+ exit(STATE_UNKNOWN);
+ case 'V': /* version */
+ print_revision(progname, NP_VERSION);
+ exit(STATE_UNKNOWN);
+ case 'v': /* version */
+ verbose = true;
+ break;
+ case 't': /* timeout period */
+ timeout_interval = atoi(optarg);
+ break;
+ case 'H': /* hostname */
+ if (strlen(optarg) >= ADDRESS_LENGTH)
+ die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+ strcpy(query_address, optarg);
+ break;
+ case 's': /* server name */
+ /* TODO: this host_or_die check is probably unnecessary.
+ * Better to confirm nslookup response matches */
+ host_or_die(optarg);
+ if (strlen(optarg) >= ADDRESS_LENGTH)
+ die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+ strcpy(dns_server, optarg);
+ break;
+ case 'r': /* reverse server name */
+ /* TODO: Is this host_or_die necessary? */
+ host_or_die(optarg);
+ if (strlen(optarg) >= ADDRESS_LENGTH)
+ die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+ strcpy(ptr_server, optarg);
+ break;
+ case 'a': /* expected address */
+ if (strlen(optarg) >= ADDRESS_LENGTH)
+ die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+ if (strchr(optarg, ',') != NULL) {
+ char *comma = strchr(optarg, ',');
+ while (comma != NULL) {
+ expected_address = (char **)realloc(expected_address, (expected_address_cnt + 1) * sizeof(char **));
+ expected_address[expected_address_cnt] = strndup(optarg, comma - optarg);
+ expected_address_cnt++;
+ optarg = comma + 1;
+ comma = strchr(optarg, ',');
+ }
+ expected_address = (char **)realloc(expected_address, (expected_address_cnt + 1) * sizeof(char **));
+ expected_address[expected_address_cnt] = strdup(optarg);
+ expected_address_cnt++;
+ } else {
+ expected_address = (char **)realloc(expected_address, (expected_address_cnt + 1) * sizeof(char **));
+ expected_address[expected_address_cnt] = strdup(optarg);
+ expected_address_cnt++;
+ }
+ break;
+ case 'n': /* expect NXDOMAIN */
+ expect_nxdomain = true;
+ break;
+ case 'A': /* expect authority */
+ expect_authority = true;
+ break;
+ case 'L': /* all must match */
+ all_match = true;
+ break;
+ case 'w':
+ warning = optarg;
+ break;
+ case 'c':
+ critical = optarg;
+ break;
+ default: /* args not parsable */
+ usage5();
+ }
}
- expected_address = (char **)realloc(expected_address, (expected_address_cnt+1) * sizeof(char**));
- expected_address[expected_address_cnt] = strdup(optarg);
- expected_address_cnt++;
- } else {
- expected_address = (char **)realloc(expected_address, (expected_address_cnt+1) * sizeof(char**));
- expected_address[expected_address_cnt] = strdup(optarg);
- expected_address_cnt++;
- }
- break;
- case 'n': /* expect NXDOMAIN */
- expect_nxdomain = true;
- break;
- case 'A': /* expect authority */
- expect_authority = true;
- break;
- case 'L': /* all must match */
- all_match = true;
- break;
- case 'w':
- warning = optarg;
- break;
- case 'c':
- critical = optarg;
- break;
- default: /* args not parsable */
- usage5();
- }
- }
-
- c = optind;
- if (strlen(query_address)==0 && c=ADDRESS_LENGTH)
- die (STATE_UNKNOWN, _("Input buffer overflow\n"));
- strcpy (query_address, argv[c++]);
- }
-
- if (strlen(dns_server)==0 && c= ADDRESS_LENGTH)
- die (STATE_UNKNOWN, _("Input buffer overflow\n"));
- strcpy (dns_server, argv[c++]);
- }
-
- set_thresholds(&time_thresholds, warning, critical);
-
- return validate_arguments ();
-}
+ c = optind;
+ if (strlen(query_address) == 0 && c < argc) {
+ if (strlen(argv[c]) >= ADDRESS_LENGTH)
+ die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+ strcpy(query_address, argv[c++]);
+ }
-int
-validate_arguments ()
-{
- if (query_address[0] == 0) {
- printf ("missing --host argument\n");
- return ERROR;
- }
+ if (strlen(dns_server) == 0 && c < argc) {
+ /* TODO: See -s option */
+ host_or_die(argv[c]);
+ if (strlen(argv[c]) >= ADDRESS_LENGTH)
+ die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+ strcpy(dns_server, argv[c++]);
+ }
- if (expected_address_cnt > 0 && expect_nxdomain) {
- printf ("--expected-address and --expect-nxdomain cannot be combined\n");
- return ERROR;
- }
+ set_thresholds(&time_thresholds, warning, critical);
- return OK;
+ return validate_arguments();
}
+int validate_arguments() {
+ if (query_address[0] == 0) {
+ printf("missing --host argument\n");
+ return ERROR;
+ }
+
+ if (expected_address_cnt > 0 && expect_nxdomain) {
+ printf("--expected-address and --expect-nxdomain cannot be combined\n");
+ return ERROR;
+ }
-void
-print_help (void)
-{
- print_revision (progname, NP_VERSION);
-
- printf ("Copyright (c) 1999 Ethan Galstad \n");
- printf (COPYRIGHT, copyright, email);
-
- printf ("%s\n", _("This plugin uses the nslookup program to obtain the IP address for the given host/domain query."));
- printf ("%s\n", _("An optional DNS server to use may be specified."));
- printf ("%s\n", _("If no DNS server is specified, the default server(s) specified in /etc/resolv.conf will be used."));
-
- printf ("\n\n");
-
- print_usage ();
-
- printf (UT_HELP_VRSN);
- printf (UT_EXTRA_OPTS);
-
- printf (" -H, --hostname=HOST\n");
- printf (" %s\n", _("The name or address you want to query"));
- printf (" -s, --server=HOST\n");
- printf (" %s\n", _("Optional DNS server you want to use for the lookup"));
- printf (" -a, --expected-address=IP-ADDRESS|CIDR|HOST\n");
- printf (" %s\n", _("Optional IP-ADDRESS/CIDR you expect the DNS server to return. HOST must end"));
- printf (" %s\n", _("with a dot (.). This option can be repeated multiple times (Returns OK if any"));
- printf (" %s\n", _("value matches)."));
- printf (" -n, --expect-nxdomain\n");
- printf (" %s\n", _("Expect the DNS server to return NXDOMAIN (i.e. the domain was not found)"));
- printf (" %s\n", _("Cannot be used together with -a"));
- printf (" -A, --expect-authority\n");
- printf (" %s\n", _("Optionally expect the DNS server to be authoritative for the lookup"));
- printf (" -w, --warning=seconds\n");
- printf (" %s\n", _("Return warning if elapsed time exceeds value. Default off"));
- printf (" -c, --critical=seconds\n");
- printf (" %s\n", _("Return critical if elapsed time exceeds value. Default off"));
- printf (" -L, --all\n");
- printf (" %s\n", _("Return critical if the list of expected addresses does not match all addresses"));
- printf (" %s\n", _("returned. Default off"));
-
- printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
-
- printf (UT_SUPPORT);
+ return OK;
}
+void print_help(void) {
+ print_revision(progname, NP_VERSION);
+
+ printf("Copyright (c) 1999 Ethan Galstad \n");
+ printf(COPYRIGHT, copyright, email);
+
+ printf("%s\n", _("This plugin uses the nslookup program to obtain the IP address for the given host/domain query."));
+ printf("%s\n", _("An optional DNS server to use may be specified."));
+ printf("%s\n", _("If no DNS server is specified, the default server(s) specified in /etc/resolv.conf will be used."));
+
+ printf("\n\n");
+
+ print_usage();
+
+ printf(UT_HELP_VRSN);
+ printf(UT_EXTRA_OPTS);
+
+ printf(" -H, --hostname=HOST\n");
+ printf(" %s\n", _("The name or address you want to query"));
+ printf(" -s, --server=HOST\n");
+ printf(" %s\n", _("Optional DNS server you want to use for the lookup"));
+ printf(" -a, --expected-address=IP-ADDRESS|CIDR|HOST\n");
+ printf(" %s\n", _("Optional IP-ADDRESS/CIDR you expect the DNS server to return. HOST must end"));
+ printf(" %s\n", _("with a dot (.). This option can be repeated multiple times (Returns OK if any"));
+ printf(" %s\n", _("value matches)."));
+ printf(" -n, --expect-nxdomain\n");
+ printf(" %s\n", _("Expect the DNS server to return NXDOMAIN (i.e. the domain was not found)"));
+ printf(" %s\n", _("Cannot be used together with -a"));
+ printf(" -A, --expect-authority\n");
+ printf(" %s\n", _("Optionally expect the DNS server to be authoritative for the lookup"));
+ printf(" -w, --warning=seconds\n");
+ printf(" %s\n", _("Return warning if elapsed time exceeds value. Default off"));
+ printf(" -c, --critical=seconds\n");
+ printf(" %s\n", _("Return critical if elapsed time exceeds value. Default off"));
+ printf(" -L, --all\n");
+ printf(" %s\n", _("Return critical if the list of expected addresses does not match all addresses"));
+ printf(" %s\n", _("returned. Default off"));
+
+ printf(UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+
+ printf(UT_SUPPORT);
+}
-void
-print_usage (void)
-{
- printf ("%s\n", _("Usage:"));
- printf ("%s -H host [-s server] [-a expected-address] [-n] [-A] [-t timeout] [-w warn] [-c crit] [-L]\n", progname);
+void print_usage(void) {
+ printf("%s\n", _("Usage:"));
+ printf("%s -H host [-s server] [-a expected-address] [-n] [-A] [-t timeout] [-w warn] [-c crit] [-L]\n", progname);
}
--
cgit v1.2.3-74-g34f1