1 files changed, 587 insertions, 575 deletions

diff --git a/plugins/check_dns.c b/plugins/check_dns.c
index 468bc958..95f33083 100644
--- a/plugins/check_dns.c
+++ b/plugins/check_dns.c
@@ -1,36 +1,36 @@
 /*****************************************************************************
-* 
-* 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 <http://www.gnu.org/licenses/>.
-* 
-* 
-*****************************************************************************/
+ *
+ * Monitoring check_dns plugin
+ *
+ * License: GPL
+ * Copyright (c) 2000-2024 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 <http://www.gnu.org/licenses/>.
+ *
+ *
+ *****************************************************************************/
 
 const char *progname = "check_dns";
-const char *copyright = "2000-2008";
+const char *copyright = "2000-2024";
 const char *email = "devel@monitoring-plugins.org";
 
 #include "common.h"
@@ -39,579 +39,591 @@ 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 *);
-bool ip_match_cidr(const char *, const char *);
-unsigned long ip2long(const char *);
-void print_help (void);
-void print_usage (void);
-
-#define ADDRESS_LENGTH 256
-char query_address[ADDRESS_LENGTH] = "";
-char dns_server[ADDRESS_LENGTH] = "";
-char ptr_server[ADDRESS_LENGTH] = "";
-bool verbose = false;
-char **expected_address = NULL;
-int expected_address_cnt = 0;
-bool expect_nxdomain = false;
-
-bool expect_authority = false;
-bool all_match = false;
-thresholds *time_thresholds = NULL;
-
-static int
-qstrcmp(const void *p1, const void *p2)
-{
+#include "states.h"
+#include "check_dns.d/config.h"
+
+typedef struct {
+        int errorcode;
+        check_dns_config config;
+} check_dns_config_wrapper;
+static check_dns_config_wrapper process_arguments(int /*argc*/, char ** /*argv*/);
+static check_dns_config_wrapper validate_arguments(check_dns_config_wrapper /*config_wrapper*/);
+static mp_state_enum error_scan(char * /*input_buffer*/, bool * /*is_nxdomain*/, const char /*dns_server*/[ADDRESS_LENGTH]);
+static bool ip_match_cidr(const char * /*addr*/, const char * /*cidr_ro*/);
+static unsigned long ip2long(const char * /*src*/);
+static void print_help(void);
+void print_usage(void);
+
+static bool verbose = false;
+
+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) {
+        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);
+
+        check_dns_config_wrapper tmp = process_arguments(argc, argv);
+
+        if (tmp.errorcode == ERROR) {
+                usage_va(_("Could not parse arguments"));
+        }
+
+        const check_dns_config config = tmp.config;
+
+        char *command_line = NULL;
+        /* get the command to run */
+        xasprintf(&command_line, "%s %s %s", NSLOOKUP_COMMAND, config.query_address, config.dns_server);
+
+        struct timeval tv;
+        alarm(timeout_interval);
+        gettimeofday(&tv, NULL);
+
+        if (verbose) {
+                printf("%s\n", command_line);
+        }
+
+        output chld_out;
+        output chld_err;
+        char *msg = NULL;
+        mp_state_enum result = STATE_UNKNOWN;
+        /* 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, main results get retrieved here
+         * =====
+         */
+        char *address = NULL;    /* comma separated str with addrs/ptrs (sorted) */
+        char **addresses = NULL; // All addresses parsed from stdout
+        size_t n_addresses = 0;  // counter for retrieved addresses
+        bool non_authoritative = false;
+        bool is_nxdomain = false;
+        bool parse_address = false; /* This flag scans for Address: but only after Name: */
+        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 ((strstr(chld_out.line[i], "canonical name = ") != NULL)) {
+                                continue;
+                        }
+                        char *temp_buffer = NULL;
+                        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(config.dns_server) > 0) {
+                        char *temp_buffer = strchr(chld_out.line[i], ':');
+                        if (temp_buffer == NULL) {
+                                die(STATE_UNKNOWN, _("'%s' returned a weirdly formatted Server line\n"), NSLOOKUP_COMMAND);
+                        }
+
+                        temp_buffer++;
+
+                        /* Strip leading tabs */
+                        for (; *temp_buffer != '\0' && *temp_buffer == '\t'; temp_buffer++) {
+                                /* NOOP */;
+                        }
+
+                        strip(temp_buffer);
+                        if (strlen(temp_buffer) == 0) {
+                                die(STATE_CRITICAL, _("DNS CRITICAL - '%s' returned empty server string\n"), NSLOOKUP_COMMAND);
+                        }
+
+                        if (strcmp(temp_buffer, config.dns_server) != 0) {
+                                die(STATE_CRITICAL, _("DNS CRITICAL - No response from DNS %s\n"), config.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:"))) {
+                        char *temp_buffer = strchr(chld_out.line[i], ':');
+                        if (temp_buffer == NULL) {
+                                die(STATE_UNKNOWN, _("'%s' returned a weirdly formatted Address line\n"), NSLOOKUP_COMMAND);
+                        }
+
+                        temp_buffer++;
+
+                        /* Strip leading spaces */
+                        while (*temp_buffer == ' ') {
+                                temp_buffer++;
+                        }
+
+                        strip(temp_buffer);
+                        if (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, config.dns_server);
+                if (result != STATE_OK) {
+                        msg = strchr(chld_out.line[i], ':');
+                        if (msg) {
+                                msg++;
+                        }
+                        break;
+                }
+        }
+
+        char input_buffer[MAX_INPUT_BUFFER];
+        /* 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, config.dns_server) != STATE_OK) {
+                        result = max_state(result, error_scan(chld_err.line[i], &is_nxdomain, config.dns_server));
+                        msg = strchr(input_buffer, ':');
+                        if (msg) {
+                                msg++;
+                        } else {
+                                msg = input_buffer;
+                        }
+                }
+        }
+
+        if (is_nxdomain && !config.expect_nxdomain) {
+                die(STATE_CRITICAL, _("Domain '%s' was not found by the server\n"), config.query_address);
+        }
+
+        if (addresses) {
+                size_t slen = 1;
+                char *adrp = NULL;
+                qsort(addresses, n_addresses, sizeof(*addresses), qstrcmp);
+                for (size_t i = 0; i < n_addresses; i++) {
+                        slen += strlen(addresses[i]) + 1;
+                }
+
+                // Temporary pointer adrp gets moved, address stays on the beginning
+                adrp = address = malloc(slen);
+                for (size_t 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 && config.expected_address_cnt > 0) {
+                result = STATE_CRITICAL;
+                char *temp_buffer = "";
+                unsigned long expect_match = (1 << config.expected_address_cnt) - 1;
+                unsigned long addr_match = (1 << n_addresses) - 1;
+
+                for (size_t i = 0; i < config.expected_address_cnt; i++) {
+                        /* check if we get a match on 'raw' ip or cidr */
+                        for (size_t j = 0; j < n_addresses; j++) {
+                                if (strcmp(addresses[j], config.expected_address[i]) == 0 || ip_match_cidr(addresses[j], config.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, config.expected_address[i]);
+                }
+                /* check if expected_address must cover all in addresses and none may be missing */
+                if (config.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 (config.expect_nxdomain) {
+                if (!is_nxdomain) {
+                        result = STATE_CRITICAL;
+                        xasprintf(&msg, _("Domain '%s' was found by the server: '%s'\n"), config.query_address, address);
+                } else {
+                        if (address != NULL) {
+                                free(address);
+                        }
+                        address = "NXDOMAIN";
+                }
+        }
+
+        /* check if authoritative */
+        if (result == STATE_OK && config.expect_authority && non_authoritative) {
+                result = STATE_CRITICAL;
+                xasprintf(&msg, _("server %s is not authoritative for %s"), config.dns_server, config.query_address);
+        }
+
+        long microsec = deltime(tv);
+        double elapsed_time = (double)microsec / 1.0e6;
+
+        if (result == STATE_OK) {
+                result = get_status(elapsed_time, config.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"), config.query_address, address);
+                if ((config.time_thresholds->warning != NULL) && (config.time_thresholds->critical != NULL)) {
+                        printf("|%s\n", fperfdata("time", elapsed_time, "s", true, config.time_thresholds->warning->end, true,
+                                                                          config.time_thresholds->critical->end, true, 0, false, 0));
+                } else if ((config.time_thresholds->warning == NULL) && (config.time_thresholds->critical != NULL)) {
+                        printf("|%s\n", fperfdata("time", elapsed_time, "s", false, 0, true, config.time_thresholds->critical->end, true, 0, false, 0));
+                } else if ((config.time_thresholds->warning != NULL) && (config.time_thresholds->critical == NULL)) {
+                        printf("|%s\n", fperfdata("time", elapsed_time, "s", true, config.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);
+        }
 
-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; 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;
+        exit(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;
+        char *mask_c;
+        char *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;
+mp_state_enum error_scan(char *input_buffer, bool *is_nxdomain, const char dns_server[ADDRESS_LENGTH]) {
 
-}
+        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;
+        }
 
-/* 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, ',');
+        /* 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);
         }
-        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<argc) {
-    if (strlen(argv[c])>=ADDRESS_LENGTH)
-      die (STATE_UNKNOWN, _("Input buffer overflow\n"));
-    strcpy (query_address, argv[c++]);
-  }
-
-  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++]);
-  }
-
-  set_thresholds(&time_thresholds, warning, critical);
-
-  return validate_arguments ();
+
+        /* 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 */
+check_dns_config_wrapper process_arguments(int argc, char **argv) {
+        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}};
+
+        check_dns_config_wrapper result = {
+                .config = check_dns_config_init(),
+                .errorcode = OK,
+        };
+
+        if (argc < 2) {
+                result.errorcode = ERROR;
+                return result;
+        }
+
+        for (int index = 1; index < argc; index++) {
+                if (strcmp("-to", argv[index]) == 0) {
+                        strcpy(argv[index], "-t");
+                }
+        }
+
+        char *warning = NULL;
+        char *critical = NULL;
+        int opt_index = 0;
+        int index = 0;
+        while (true) {
+                index = getopt_long(argc, argv, "hVvALnt:H:s:r:a:w:c:", long_opts, &opt_index);
+
+                if (index == -1 || index == EOF) {
+                        break;
+                }
+
+                switch (index) {
+                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(result.config.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(result.config.dns_server, optarg);
+                        break;
+                case 'r': /* reverse server name */
+                        /* TODO: Is this host_or_die necessary? */
+                        // TODO This does not do anything!!! 2025-03-08 rincewind
+                        host_or_die(optarg);
+                        if (strlen(optarg) >= ADDRESS_LENGTH) {
+                                die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+                        }
+                        static char ptr_server[ADDRESS_LENGTH] = "";
+                        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) {
+                                        result.config.expected_address =
+                                                (char **)realloc(result.config.expected_address, (result.config.expected_address_cnt + 1) * sizeof(char **));
+                                        result.config.expected_address[result.config.expected_address_cnt] = strndup(optarg, comma - optarg);
+                                        result.config.expected_address_cnt++;
+                                        optarg = comma + 1;
+                                        comma = strchr(optarg, ',');
+                                }
+                                result.config.expected_address =
+                                        (char **)realloc(result.config.expected_address, (result.config.expected_address_cnt + 1) * sizeof(char **));
+                                result.config.expected_address[result.config.expected_address_cnt] = strdup(optarg);
+                                result.config.expected_address_cnt++;
+                        } else {
+                                result.config.expected_address =
+                                        (char **)realloc(result.config.expected_address, (result.config.expected_address_cnt + 1) * sizeof(char **));
+                                result.config.expected_address[result.config.expected_address_cnt] = strdup(optarg);
+                                result.config.expected_address_cnt++;
+                        }
+                        break;
+                case 'n': /* expect NXDOMAIN */
+                        result.config.expect_nxdomain = true;
+                        break;
+                case 'A': /* expect authority */
+                        result.config.expect_authority = true;
+                        break;
+                case 'L': /* all must match */
+                        result.config.all_match = true;
+                        break;
+                case 'w':
+                        warning = optarg;
+                        break;
+                case 'c':
+                        critical = optarg;
+                        break;
+                default: /* args not parsable */
+                        usage5();
+                }
+        }
+
+        index = optind;
+        if (strlen(result.config.query_address) == 0 && index < argc) {
+                if (strlen(argv[index]) >= ADDRESS_LENGTH) {
+                        die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+                }
+                strcpy(result.config.query_address, argv[index++]);
+        }
 
-int
-validate_arguments ()
-{
-  if (query_address[0] == 0) {
-    printf ("missing --host argument\n");
-    return ERROR;
-  }
+        if (strlen(result.config.dns_server) == 0 && index < argc) {
+                /* TODO: See -s option */
+                host_or_die(argv[index]);
+                if (strlen(argv[index]) >= ADDRESS_LENGTH) {
+                        die(STATE_UNKNOWN, _("Input buffer overflow\n"));
+                }
+                strcpy(result.config.dns_server, argv[index++]);
+        }
 
-  if (expected_address_cnt > 0 && expect_nxdomain) {
-    printf ("--expected-address and --expect-nxdomain cannot be combined\n");
-    return ERROR;
-  }
+        set_thresholds(&result.config.time_thresholds, warning, critical);
 
-  return OK;
+        return validate_arguments(result);
 }
 
+check_dns_config_wrapper validate_arguments(check_dns_config_wrapper config_wrapper) {
+        if (config_wrapper.config.query_address[0] == 0) {
+                printf("missing --host argument\n");
+                config_wrapper.errorcode = ERROR;
+                return config_wrapper;
+        }
+
+        if (config_wrapper.config.expected_address_cnt > 0 && config_wrapper.config.expect_nxdomain) {
+                printf("--expected-address and --expect-nxdomain cannot be combined\n");
+                config_wrapper.errorcode = ERROR;
+                return config_wrapper;
+        }
 
-void
-print_help (void)
-{
-  print_revision (progname, NP_VERSION);
-
-  printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\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 config_wrapper;
 }
 
+void print_help(void) {
+        print_revision(progname, NP_VERSION);
+
+        printf("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\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);
 }