33 files changed, 289 insertions, 197 deletions

diff --git a/.travis.yml b/.travis.yml
index 29290fd1..dcf13d58 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,7 +20,7 @@ before_install:
   # - mysql -e "create database IF NOT EXISTS test;" -uroot
 
 install:
-  - sudo apt-get install -qq --no-install-recommends perl autotools-dev libdbi-dev libldap2-dev libpq-dev libmysqlclient-dev libfreeradius-client-dev libkrb5-dev libnet-snmp-perl procps
+  - sudo apt-get install -qq --no-install-recommends perl autotools-dev libdbi-dev libldap2-dev libpq-dev libmysqlclient-dev libradcli-dev libkrb5-dev libnet-snmp-perl procps
   - sudo apt-get install -qq --no-install-recommends libdbi0-dev libdbd-sqlite3 libssl-dev dnsutils snmp-mibs-downloader libsnmp-perl snmpd
   - sudo apt-get install -qq --no-install-recommends fping snmp netcat smbclient fping pure-ftpd apache2 postfix libhttp-daemon-ssl-perl
   - sudo apt-get install -qq --no-install-recommends libdbd-sybase-perl libnet-dns-perl
diff --git a/NEWS b/NEWS
index 2a9ea62c..8a8df6a9 100644
--- a/NEWS
+++ b/NEWS
@@ -12,6 +12,10 @@ This file documents the major additions and syntax changes between releases.
           to force TLSv1.1 and TLSv1.2 connections, respectively
         The check_http -S/--ssl option now allows for specifying the desired
           protocol with a "+" suffix to also accept newer versions
+        check_users: add support for range thresholds (John C. Frickson)
+        check_snmp: add ipv6 support (abrist)
+        check_http: report certificate expire date in UTC (pirtoo / ylfingr)
+        check_radius now supports the radcli library
 
         FIXES
         Let check_real terminate lines with CRLF when talking to the server, as
@@ -19,6 +23,7 @@ This file documents the major additions and syntax changes between releases.
         Fix check_procs on HP-UX
         check_smtp's -e/--expect option can now be combined with -S/--starttls
         Fix incorrect performance data thresholds emitted by check_ups
+        check_http: fix host header port handling (odenbach)
 
         WARNINGS
         The format of the performance data emitted by check_mrtgtraf has been
diff --git a/REQUIREMENTS b/REQUIREMENTS
index 303fd62b..ac7b5935 100644
--- a/REQUIREMENTS
+++ b/REQUIREMENTS
@@ -50,16 +50,18 @@ check_dbi:
           http://libdbi.sourceforge.net/
 
 check_radius:
-        - Requires the FreeRADIUS Client library available from:
+        - Requires the radcli library available from:
+          http://radcli.github.io/radcli/
+        - As an alternative, the FreeRADIUS Client library may be used:
           http://freeradius.org/freeradius-client/
-        - As an alternative, the radiusclient-ng library may be used:
+        - As another alternative, the radiusclient-ng library may be used:
           http://sourceforge.net/projects/radiusclient-ng.berlios/
         - This plugin also works with the original radiusclient library from
           ftp://ftp.cityline.net/pub/radiusclient/
                 RPM (rpmfind): radiusclient 0.3.2, radiusclient-devel-0.3.2
-          However, you probably want to use the FreeRADIUS Client library, as
-          both radiusclient and radiusclient-ng are unmaintained and have known
-          issues.
+          However, you probably want to use either radcli or the FreeRADIUS
+          Client library, as both radiusclient and radiusclient-ng are
+          unmaintained and have known issues.
 
 check_snmp:
         - Requires the NET-SNMP package available from
diff --git a/THANKS.in b/THANKS.in
index 59c90feb..f48a8bd1 100644
--- a/THANKS.in
+++ b/THANKS.in
@@ -336,3 +336,8 @@ Nick Peelman
 Sebastian Herbszt
 Christopher Schultz
 Matthias Hähnel
+Roberto Greiner
+Peter (pirtoo)
+ylfingr
+Christian Kujau
+Christopher Odenbach
diff --git a/configure.ac b/configure.ac
index 0a554af6..367e82a6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -273,26 +273,33 @@ AC_ARG_WITH([radius], [AS_HELP_STRING([--without-radius], [Skips the radius plug
 dnl Check for radius libraries
 AS_IF([test "x$with_radius" != "xno"], [
   _SAVEDLIBS="$LIBS"
-  AC_CHECK_LIB(freeradius-client,rc_read_config)
-  if test "$ac_cv_lib_freeradius_client_rc_read_config" = "yes"; then
+  AC_CHECK_LIB(radcli,rc_read_config)
+  if test "$ac_cv_lib_radcli_rc_read_config" = "yes"; then
     EXTRAS="$EXTRAS check_radius\$(EXEEXT)"
-    RADIUSLIBS="-lfreeradius-client"
+    RADIUSLIBS="-lradcli"
     AC_SUBST(RADIUSLIBS)
   else
-    AC_CHECK_LIB(radiusclient-ng,rc_read_config)
-    if test "$ac_cv_lib_radiusclient_ng_rc_read_config" = "yes"; then
+    AC_CHECK_LIB(freeradius-client,rc_read_config)
+    if test "$ac_cv_lib_freeradius_client_rc_read_config" = "yes"; then
       EXTRAS="$EXTRAS check_radius\$(EXEEXT)"
-      RADIUSLIBS="-lradiusclient-ng"
+      RADIUSLIBS="-lfreeradius-client"
       AC_SUBST(RADIUSLIBS)
     else
-      AC_CHECK_LIB(radiusclient,rc_read_config)
-      if test "$ac_cv_lib_radiusclient_rc_read_config" = "yes"; then
+      AC_CHECK_LIB(radiusclient-ng,rc_read_config)
+      if test "$ac_cv_lib_radiusclient_ng_rc_read_config" = "yes"; then
         EXTRAS="$EXTRAS check_radius\$(EXEEXT)"
-        RADIUSLIBS="-lradiusclient"
+        RADIUSLIBS="-lradiusclient-ng"
         AC_SUBST(RADIUSLIBS)
       else
-        AC_MSG_WARN([Skipping radius plugin])
-        AC_MSG_WARN([install radius libs to compile this plugin (see REQUIREMENTS).])
+        AC_CHECK_LIB(radiusclient,rc_read_config)
+        if test "$ac_cv_lib_radiusclient_rc_read_config" = "yes"; then
+          EXTRAS="$EXTRAS check_radius\$(EXEEXT)"
+          RADIUSLIBS="-lradiusclient"
+          AC_SUBST(RADIUSLIBS)
+        else
+          AC_MSG_WARN([Skipping radius plugin])
+          AC_MSG_WARN([install radius libs to compile this plugin (see REQUIREMENTS).])
+        fi
       fi
     fi
   fi
@@ -493,15 +500,15 @@ if ! test x"$with_openssl" = x"no"; then
         dnl Check for crypto lib
         _SAVEDLIBS="$LIBS"
         LIBS="-L${with_openssl}/lib"
-        AC_CHECK_LIB(crypto,CRYPTO_lock)
-        if test "$ac_cv_lib_crypto_CRYPTO_lock" = "yes"; then
+        AC_CHECK_LIB(crypto,CRYPTO_new_ex_data)
+        if test "$ac_cv_lib_crypto_CRYPTO_new_ex_data" = "yes"; then
                 dnl Check for SSL lib
                 AC_CHECK_LIB(ssl,main, SSLLIBS="-lssl -lcrypto",,-lcrypto)
         fi
         LIBS="$_SAVEDLIBS"
 
         dnl test headers and libs to decide whether check_http should use SSL
-        if test "$ac_cv_lib_crypto_CRYPTO_lock" = "yes"; then
+        if test "$ac_cv_lib_crypto_CRYPTO_new_ex_data" = "yes"; then
                 if test "$ac_cv_lib_ssl_main" = "yes"; then
                         if test "$FOUNDINCLUDE" = "yes"; then
                                 FOUNDOPENSSL="yes"
diff --git a/plugins-scripts/check_ifoperstatus.pl b/plugins-scripts/check_ifoperstatus.pl
index 3eed4bcb..9ede1633 100755
--- a/plugins-scripts/check_ifoperstatus.pl
+++ b/plugins-scripts/check_ifoperstatus.pl
@@ -325,7 +325,7 @@ sub print_help() {
         printf "                     (Implies the use of -I)\n";
         printf "   -w (--warn =i|w|c) ignore|warn|crit if the interface is dormant (default critical)\n";
         printf "   -D (--admin-down =i|w|c) same for administratively down interfaces (default warning)\n";
-        printf "   -M (--maxmsgsize) Max message size - usefull only for v1 or v2c\n";
+        printf "   -M (--maxmsgsize) Max message size - useful only for v1 or v2c\n";
         printf "   -t (--timeout)    seconds before the plugin times out (default=$TIMEOUT)\n";
         printf "   -V (--version)    Plugin version\n";
         printf "   -h (--help)       usage help \n\n";
diff --git a/plugins-scripts/check_ifstatus.pl b/plugins-scripts/check_ifstatus.pl
index 9f2f7c31..32984e53 100755
--- a/plugins-scripts/check_ifstatus.pl
+++ b/plugins-scripts/check_ifstatus.pl
@@ -280,7 +280,7 @@ sub print_help() {
         printf "                     in hex with 0x prefix generated by using \"snmpkey\" utility\n"; 
         printf "                     privacy password and authEngineID\n";
         printf "   -P (--privproto)  privacy protocol (DES or AES; default: DES)\n";
-        printf "   -M (--maxmsgsize) Max message size - usefull only for v1 or v2c\n";
+        printf "   -M (--maxmsgsize) Max message size - useful only for v1 or v2c\n";
         printf "   -t (--timeout)    seconds before the plugin times out (default=$TIMEOUT)\n";
         printf "   -V (--version)    Plugin version\n";
         printf "   -h (--help)       usage help \n\n";
diff --git a/plugins/check_by_ssh.c b/plugins/check_by_ssh.c
index 04bce38d..13d8bc3b 100644
--- a/plugins/check_by_ssh.c
+++ b/plugins/check_by_ssh.c
@@ -100,6 +100,13 @@ main (int argc, char **argv)
 
         result = cmd_run_array (commargv, &chld_out, &chld_err, 0);
 
+        if (verbose) {
+                for(i = 0; i < chld_out.lines; i++)
+                        printf("stdout: %s\n", chld_out.line[i]);
+                for(i = 0; i < chld_err.lines; i++)
+                        printf("stderr: %s\n", chld_err.line[i]);
+        }
+
         if (skip_stdout == -1) /* --skip-stdout specified without argument */
                 skip_stdout = chld_out.lines;
         if (skip_stderr == -1) /* --skip-stderr specified without argument */
diff --git a/plugins/check_dig.c b/plugins/check_dig.c
index 473d4b97..da4f0ded 100644
--- a/plugins/check_dig.c
+++ b/plugins/check_dig.c
@@ -48,7 +48,7 @@ void print_usage (void);
 
 #define UNDEFINED 0
 #define DEFAULT_PORT 53
-#define DEFAULT_TRIES 3
+#define DEFAULT_TRIES 2
 
 char *query_address = NULL;
 char *record_type = "A";
@@ -94,7 +94,7 @@ main (int argc, char **argv)
   timeout_interval_dig = timeout_interval / number_tries + number_tries;
 
   /* get the command to run */
-  xasprintf (&command_line, "%s %s %s -p %d @%s %s %s +tries=%d +time=%d",
+  xasprintf (&command_line, "%s %s %s -p %d @%s %s %s +retry=%d +time=%d",
             PATH_TO_DIG, dig_args, query_transport, server_port, dns_server, query_address, record_type, number_tries, timeout_interval_dig);
 
   alarm (timeout_interval);
diff --git a/plugins/check_disk.c b/plugins/check_disk.c
index 8e793c94..4b5ba5fe 100644
--- a/plugins/check_disk.c
+++ b/plugins/check_disk.c
@@ -58,9 +58,6 @@ const char *email = "devel@monitoring-plugins.org";
 # define ERROR -1
 #endif
 
-/* If nonzero, show inode information. */
-static int inode_format = 1;
-
 /* If nonzero, show even filesystems with zero size or
    uninteresting types. */
 static int show_all_fs = 1;
@@ -179,7 +176,7 @@ main (int argc, char **argv)
   int temp_result;
 
   struct mount_entry *me;
-  struct fs_usage fsp, tmpfsp;
+  struct fs_usage fsp;
   struct parameter_list *temp_list, *path;
 
 #ifdef __CYGWIN__
@@ -434,9 +431,7 @@ process_arguments (int argc, char **argv)
   int c, err;
   struct parameter_list *se;
   struct parameter_list *temp_list = NULL, *previous = NULL;
-  struct parameter_list *temp_path_select_list = NULL;
-  struct mount_entry *me, *temp_me;
-  int result = OK;
+  struct mount_entry *me;
   regex_t re;
   int cflags = REG_NOSUB | REG_EXTENDED;
   int default_cflags = cflags;
diff --git a/plugins/check_dns.c b/plugins/check_dns.c
index 48601f02..54ce7d16 100644
--- a/plugins/check_dns.c
+++ b/plugins/check_dns.c
@@ -81,7 +81,6 @@ main (int argc, char **argv)
   double elapsed_time;
   long microsec;
   struct timeval tv;
-  int multi_address;
   int parse_address = FALSE; /* This flag scans for Address: but only after Name: */
   output chld_out, chld_err;
   size_t i;
@@ -249,11 +248,6 @@ main (int argc, char **argv)
   elapsed_time = (double)microsec / 1.0e6;
 
   if (result == STATE_OK) {
-    if (strchr (address, ',') == NULL)
-      multi_address = FALSE;
-    else
-      multi_address = TRUE;
-
     result = get_status(elapsed_time, time_thresholds);
     if (result == STATE_OK) {
       printf ("DNS %s: ", _("OK"));
diff --git a/plugins/check_http.c b/plugins/check_http.c
index 2038f4a1..2347a6f2 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -91,10 +91,12 @@ struct timeval tv_temp;
 
 int specify_port = FALSE;
 int server_port = HTTP_PORT;
+int virtual_port = 0;
 char server_port_text[6] = "";
 char server_type[6] = "http";
 char *server_address;
 char *host_name;
+int host_name_length;
 char *server_url;
 char *user_agent;
 int server_url_length;
@@ -391,11 +393,25 @@ process_arguments (int argc, char **argv)
     case 'H': /* Host Name (virtual host) */
       host_name = strdup (optarg);
       if (host_name[0] == '[') {
-        if ((p = strstr (host_name, "]:")) != NULL) /* [IPv6]:port */
-          server_port = atoi (p + 2);
+        if ((p = strstr (host_name, "]:")) != NULL) { /* [IPv6]:port */
+          virtual_port = atoi (p + 2);
+          /* cut off the port */
+          host_name_length = strlen (host_name) - strlen (p) - 1;
+          free (host_name);
+          host_name = strndup (optarg, host_name_length);
+          if (specify_port == FALSE)
+            server_port = virtual_port;
+        }
       } else if ((p = strchr (host_name, ':')) != NULL
-                 && strchr (++p, ':') == NULL) /* IPv4:port or host:port */
-          server_port = atoi (p);
+                 && strchr (++p, ':') == NULL) { /* IPv4:port or host:port */
+          virtual_port = atoi (p);
+          /* cut off the port */
+          host_name_length = strlen (host_name) - strlen (p) - 1;
+          free (host_name);
+          host_name = strndup (optarg, host_name_length);
+          if (specify_port == FALSE)
+            server_port = virtual_port;
+        }
       break;
     case 'I': /* Server IP-address */
       server_address = strdup (optarg);
@@ -550,9 +566,12 @@ process_arguments (int argc, char **argv)
   if (http_method == NULL)
     http_method = strdup ("GET");
 
-  if (client_cert && !client_privkey) 
+  if (client_cert && !client_privkey)
     usage4 (_("If you use a client certificate you must also specify a private key file"));
 
+  if (virtual_port == 0)
+    virtual_port = server_port;
+
   return TRUE;
 }
 
@@ -922,8 +941,8 @@ check_http (void)
     elapsed_time_ssl = (double)microsec_ssl / 1.0e6;
     if (check_cert == TRUE) {
       result = np_net_ssl_check_cert(days_till_exp_warn, days_till_exp_crit);
-      np_net_ssl_cleanup();
       if (sd) close(sd);
+      np_net_ssl_cleanup();
       return result;
     }
   }
@@ -958,13 +977,13 @@ check_http (void)
        * 14.23).  Some server applications/configurations cause trouble if the
        * (default) port is explicitly specified in the "Host:" header line.
        */
-      if ((use_ssl == FALSE && server_port == HTTP_PORT) ||
-          (use_ssl == TRUE && server_port == HTTPS_PORT) ||
+      if ((use_ssl == FALSE && virtual_port == HTTP_PORT) ||
+          (use_ssl == TRUE && virtual_port == HTTPS_PORT) ||
           (server_address != NULL && strcmp(http_method, "CONNECT") == 0
          && host_name != NULL && use_ssl == TRUE))
         xasprintf (&buf, "%sHost: %s\r\n", buf, host_name);
       else
-        xasprintf (&buf, "%sHost: %s:%d\r\n", buf, host_name, server_port);
+        xasprintf (&buf, "%sHost: %s:%d\r\n", buf, host_name, virtual_port);
     }
   }
 
@@ -1022,6 +1041,10 @@ check_http (void)
       microsec_firstbyte = deltime (tv_temp);
       elapsed_time_firstbyte = (double)microsec_firstbyte / 1.0e6;
     }
+    while (pos = memchr(buffer, '\0', i)) {
+      /* replace nul character with a blank */
+      *pos = ' ';
+    }
     buffer[i] = '\0';
     xasprintf (&full_page_new, "%s%s", full_page, buffer);
     free (full_page);
@@ -1063,10 +1086,10 @@ check_http (void)
     die (STATE_CRITICAL, _("HTTP CRITICAL - No data received from host\n"));
 
   /* close the connection */
+  if (sd) close(sd);
 #ifdef HAVE_SSL
   np_net_ssl_cleanup();
 #endif
-  if (sd) close(sd);
 
   /* Save check time */
   microsec = deltime (tv);
@@ -1421,6 +1444,9 @@ redir (char *pos, char *status_line)
          MAX_PORT, server_type, server_address, server_port, server_url,
          display_html ? "</A>" : "");
 
+  /* reset virtual port */
+  virtual_port = server_port;
+
   if (verbose)
     printf (_("Redirection to %s://%s:%d%s\n"), server_type,
             host_name ? host_name : server_address, server_port, server_url);
diff --git a/plugins/check_ide_smart.c b/plugins/check_ide_smart.c
index 8d540ca1..46621318 100644
--- a/plugins/check_ide_smart.c
+++ b/plugins/check_ide_smart.c
@@ -166,7 +166,6 @@ enum SmartCommand
 
 char *get_offline_text (int);
 int smart_read_values (int, values_t *);
-int values_not_passed (values_t *, thresholds_t *);
 int nagios (values_t *, thresholds_t *);
 void print_value (value_t *, threshold_t *);
 void print_values (values_t *, thresholds_t *);
@@ -340,31 +339,6 @@ smart_read_values (int fd, values_t * values)
 
 
 int
-values_not_passed (values_t * p, thresholds_t * t) 
-{
-        value_t * value = p->values;
-        threshold_t * threshold = t->thresholds;
-        int failed = 0;
-        int passed = 0;
-        int i;
-        for (i = 0; i < NR_ATTRIBUTES; i++) {
-                if (value->id && threshold->id && value->id == threshold->id) {
-                        if (value->value < threshold->threshold) {
-                                ++failed;
-                        }
-                        else {
-                                ++passed;
-                        }
-                }
-                ++value;
-                ++threshold;
-        }
-        return (passed ? -failed : 2);
-}
-
-
-
-int
 nagios (values_t * p, thresholds_t * t) 
 {
         value_t * value = p->values;
diff --git a/plugins/check_load.c b/plugins/check_load.c
index a96435f4..b1cc498f 100644
--- a/plugins/check_load.c
+++ b/plugins/check_load.c
@@ -160,7 +160,7 @@ main (int argc, char **argv)
             sscanf (input_buffer, "%*[^l]load averages: %lf, %lf, %lf", &la1, &la5, &la15);
     }
     else {
-                printf (_("could not parse load from uptime: %s\n"), result, PATH_TO_UPTIME);
+                printf (_("could not parse load from uptime %s: %s\n"), PATH_TO_UPTIME, result);
                 return STATE_UNKNOWN;
     }
 
diff --git a/plugins/check_ntp.c b/plugins/check_ntp.c
index 75efc289..5ac6c65b 100644
--- a/plugins/check_ntp.c
+++ b/plugins/check_ntp.c
@@ -297,7 +297,7 @@ void setup_request(ntp_message *p){
  * this is done by filtering servers based on stratum, dispersion, and
  * finally round-trip delay. */
 int best_offset_server(const ntp_server_results *slist, int nservers){
-        int i=0, cserver=0, best_server=-1;
+        int cserver=0, best_server=-1;
 
         /* for each server */
         for(cserver=0; cserver<nservers; cserver++){
@@ -356,7 +356,7 @@ int best_offset_server(const ntp_server_results *slist, int nservers){
  *   we have to do it in a way that our lazy macros don't handle currently :( */
 double offset_request(const char *host, int *status){
         int i=0, j=0, ga_result=0, num_hosts=0, *socklist=NULL, respnum=0;
-        int servers_completed=0, one_written=0, one_read=0, servers_readable=0, best_index=-1;
+        int servers_completed=0, one_read=0, servers_readable=0, best_index=-1;
         time_t now_time=0, start_ts=0;
         ntp_message *req=NULL;
         double avg_offset=0.;
@@ -421,7 +421,6 @@ double offset_request(const char *host, int *status){
                  * been touched in the past second or so and is still lacking
                  * some responses.  for each of these servers, send a new request,
                  * and update the "waiting" timestamp with the current time. */
-                one_written=0;
                 now_time=time(NULL);
 
                 for(i=0; i<num_hosts; i++){
@@ -431,7 +430,6 @@ double offset_request(const char *host, int *status){
                                 setup_request(&req[i]);
                                 write(socklist[i], &req[i], sizeof(ntp_message));
                                 servers[i].waiting=now_time;
-                                one_written=1;
                                 break;
                         }
                 }
diff --git a/plugins/check_ntp_time.c b/plugins/check_ntp_time.c
index 295f86f6..391b2df2 100644
--- a/plugins/check_ntp_time.c
+++ b/plugins/check_ntp_time.c
@@ -244,7 +244,7 @@ void setup_request(ntp_message *p){
  * this is done by filtering servers based on stratum, dispersion, and
  * finally round-trip delay. */
 int best_offset_server(const ntp_server_results *slist, int nservers){
-        int i=0, cserver=0, best_server=-1;
+        int cserver=0, best_server=-1;
 
         /* for each server */
         for(cserver=0; cserver<nservers; cserver++){
@@ -303,7 +303,7 @@ int best_offset_server(const ntp_server_results *slist, int nservers){
  *   we have to do it in a way that our lazy macros don't handle currently :( */
 double offset_request(const char *host, int *status){
         int i=0, j=0, ga_result=0, num_hosts=0, *socklist=NULL, respnum=0;
-        int servers_completed=0, one_written=0, one_read=0, servers_readable=0, best_index=-1;
+        int servers_completed=0, one_read=0, servers_readable=0, best_index=-1;
         time_t now_time=0, start_ts=0;
         ntp_message *req=NULL;
         double avg_offset=0.;
@@ -368,7 +368,6 @@ double offset_request(const char *host, int *status){
                  * been touched in the past second or so and is still lacking
                  * some responses. For each of these servers, send a new request,
                  * and update the "waiting" timestamp with the current time. */
-                one_written=0;
                 now_time=time(NULL);
 
                 for(i=0; i<num_hosts; i++){
@@ -378,7 +377,6 @@ double offset_request(const char *host, int *status){
                                 setup_request(&req[i]);
                                 write(socklist[i], &req[i], sizeof(ntp_message));
                                 servers[i].waiting=now_time;
-                                one_written=1;
                                 break;
                         }
                 }
@@ -635,7 +633,7 @@ void print_help(void){
         printf("%s\n", _("Notes:"));
         printf(" %s\n", _("If you'd rather want to monitor an NTP server, please use"));
         printf(" %s\n", _("check_ntp_peer."));
-        printf(" %s\n", _("--time-offset is usefull for compensating for servers with known"));
+        printf(" %s\n", _("--time-offset is useful for compensating for servers with known"));
         printf(" %s\n", _("and expected clock skew."));
         printf("\n");
         printf(UT_THRESHOLDS_NOTES);
diff --git a/plugins/check_radius.c b/plugins/check_radius.c
index 03cbb8b0..b3b8c829 100644
--- a/plugins/check_radius.c
+++ b/plugins/check_radius.c
@@ -36,7 +36,9 @@ const char *email = "devel@monitoring-plugins.org";
 #include "utils.h"
 #include "netutils.h"
 
-#if defined(HAVE_LIBFREERADIUS_CLIENT)
+#if defined(HAVE_LIBRADCLI)
+#include <radcli/radcli.h>
+#elif defined(HAVE_LIBFREERADIUS_CLIENT)
 #include <freeradius-client.h>
 #elif defined(HAVE_LIBRADIUSCLIENT_NG)
 #include <radiusclient-ng.h>
@@ -48,22 +50,24 @@ int process_arguments (int, char **);
 void print_help (void);
 void print_usage (void);
 
-#if defined(HAVE_LIBFREERADIUS_CLIENT) || defined(HAVE_LIBRADIUSCLIENT_NG)
+#if defined(HAVE_LIBFREERADIUS_CLIENT) || defined(HAVE_LIBRADIUSCLIENT_NG) || defined(HAVE_LIBRADCLI)
 #define my_rc_conf_str(a) rc_conf_str(rch,a)
+#if defined(HAVE_LIBRADCLI)
+#define my_rc_send_server(a,b) rc_send_server(rch,a,b,AUTH)
+#else
 #define my_rc_send_server(a,b) rc_send_server(rch,a,b)
-#ifdef HAVE_LIBFREERADIUS_CLIENT
+#endif
+#if defined(HAVE_LIBFREERADIUS_CLIENT) || defined(HAVE_LIBRADCLI)
 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(rch,a,b,c,d,(a)->secret,e,f)
 #else
 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(rch,a,b,c,d,e,f)
 #endif
-#define my_rc_own_ipaddress() rc_own_ipaddress(rch)
 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(rch,a,b,c,-1,d)
 #define my_rc_read_dictionary(a) rc_read_dictionary(rch, a)
 #else
 #define my_rc_conf_str(a) rc_conf_str(a)
 #define my_rc_send_server(a,b) rc_send_server(a, b)
 #define my_rc_buildreq(a,b,c,d,e,f) rc_buildreq(a,b,c,d,e,f)
-#define my_rc_own_ipaddress() rc_own_ipaddress()
 #define my_rc_avpair_add(a,b,c,d) rc_avpair_add(a, b, c, d)
 #define my_rc_read_dictionary(a) rc_read_dictionary(a)
 #endif
@@ -76,7 +80,7 @@ void print_usage (void);
 
 int my_rc_read_config(char *);
 
-#if defined(HAVE_LIBFREERADIUS_CLIENT) || defined(HAVE_LIBRADIUSCLIENT_NG)
+#if defined(HAVE_LIBFREERADIUS_CLIENT) || defined(HAVE_LIBRADIUSCLIENT_NG) || defined(HAVE_LIBRADCLI)
 rc_handle *rch = NULL;
 #endif
 
@@ -90,7 +94,6 @@ char *config_file = NULL;
 unsigned short port = PW_AUTH_UDP_PORT;
 int retries = 1;
 int verbose = FALSE;
-ENV *env = NULL;
 
 /******************************************************************************
 
@@ -150,6 +153,8 @@ Please note that all tags must be lowercase to use the DocBook XML DTD.
 int
 main (int argc, char **argv)
 {
+        struct sockaddr_storage ss;
+        char name[HOST_NAME_MAX];
         char msg[BUFFER_LEN];
         SEND_DATA data;
         int result = STATE_UNKNOWN;
@@ -185,15 +190,14 @@ main (int argc, char **argv)
                         die (STATE_UNKNOWN, _("Invalid NAS-Identifier\n"));
         }
 
-        if (nasipaddress != NULL) {
-                if (rc_good_ipaddr (nasipaddress))
-                        die (STATE_UNKNOWN, _("Invalid NAS-IP-Address\n"));
-                if ((client_id = rc_get_ipaddr(nasipaddress)) == 0)
-                        die (STATE_UNKNOWN, _("Invalid NAS-IP-Address\n"));
-        } else {
-                if ((client_id = my_rc_own_ipaddress ()) == 0)
-                        die (STATE_UNKNOWN, _("Can't find local IP for NAS-IP-Address\n"));
+        if (nasipaddress == NULL) {
+                if (gethostname (name, sizeof(name)) != 0)
+                        die (STATE_UNKNOWN, _("gethostname() failed!\n"));
+                nasipaddress = name;
         }
+        if (!dns_lookup (nasipaddress, &ss, AF_INET)) /* TODO: Support IPv6. */
+                die (STATE_UNKNOWN, _("Invalid NAS-IP-Address\n"));
+        client_id = ntohl (((struct sockaddr_in *)&ss)->sin_addr.s_addr);
         if (my_rc_avpair_add (&(data.send_pairs), PW_NAS_IP_ADDRESS, &client_id, 0) == NULL)
                 die (STATE_UNKNOWN, _("Invalid NAS-IP-Address\n"));
 
@@ -399,7 +403,7 @@ print_usage (void)
 
 int my_rc_read_config(char * a)
 {
-#if defined(HAVE_LIBFREERADIUS_CLIENT) || defined(HAVE_LIBRADIUSCLIENT_NG)
+#if defined(HAVE_LIBFREERADIUS_CLIENT) || defined(HAVE_LIBRADIUSCLIENT_NG) || defined(HAVE_LIBRADCLI)
         rch = rc_read_config(a);
         return (rch == NULL) ? 1 : 0;
 #else
diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c
index 1996c6d3..587a7245 100644
--- a/plugins/check_smtp.c
+++ b/plugins/check_smtp.c
@@ -59,10 +59,6 @@ enum {
 #define SMTP_STARTTLS "STARTTLS\r\n"
 #define SMTP_AUTH_LOGIN "AUTH LOGIN\r\n"
 
-#ifndef HOST_MAX_BYTES
-#define HOST_MAX_BYTES 255
-#endif
-
 #define EHLO_SUPPORTS_STARTTLS 1
 
 int process_arguments (int, char **);
@@ -239,8 +235,8 @@ main (int argc, char **argv)
                   result = np_net_ssl_init(sd);
                   if(result != STATE_OK) {
                     printf (_("CRITICAL - Cannot create SSL context.\n"));
-                    np_net_ssl_cleanup();
                     close(sd);
+                    np_net_ssl_cleanup();
                     return STATE_CRITICAL;
                   } else {
                         ssl_established = 1;
@@ -764,10 +760,12 @@ recvlines(char *buf, size_t bufsize)
 int
 my_close (void)
 {
+        int result;
+        result = close(sd);
 #ifdef HAVE_SSL
-  np_net_ssl_cleanup();
+        np_net_ssl_cleanup();
 #endif
-  return close(sd);
+        return result;
 }
 
 
diff --git a/plugins/check_snmp.c b/plugins/check_snmp.c
index 9839d6e8..da9638c4 100644
--- a/plugins/check_snmp.c
+++ b/plugins/check_snmp.c
@@ -152,7 +152,7 @@ state_data *previous_state;
 double *previous_value;
 size_t previous_size = OID_COUNT_STEP;
 int perf_labels = 1;
-
+char* ip_version = "";
 
 static char *fix_snmp_range(char *th)
 {
@@ -680,6 +680,8 @@ process_arguments (int argc, char **argv)
                 {"offset", required_argument, 0, L_OFFSET},
                 {"invert-search", no_argument, 0, L_INVERT_SEARCH},
                 {"perf-oids", no_argument, 0, 'O'},
+                {"ipv4", no_argument, 0, '4'},
+                {"ipv6", no_argument, 0, '6'},
                 {0, 0, 0, 0}
         };
 
@@ -697,7 +699,7 @@ process_arguments (int argc, char **argv)
         }
 
         while (1) {
-                c = getopt_long (argc, argv, "nhvVOt:c:w:H:C:o:e:E:d:D:s:t:R:r:l:u:p:m:P:N:L:U:a:x:A:X:",
+                c = getopt_long (argc, argv, "nhvVO46t:c:w:H:C:o:e:E:d:D:s:t:R:r:l:u:p:m:P:N:L:U:a:x:A:X:",
                                                                          longopts, &option);
 
                 if (c == -1 || c == EOF)
@@ -922,6 +924,13 @@ process_arguments (int argc, char **argv)
                 case 'O':
                         perf_labels=0;
                         break;
+                case '4':
+                        break;
+                case '6':
+                        xasprintf(&ip_version, "udp6:");
+                        if(verbose>2)
+                                printf("IPv6 detected! Will pass \"udp6:\" to snmpget.\n");
+                        break;
                 }
         }
 
@@ -1127,6 +1136,7 @@ print_help (void)
 
         printf (UT_HELP_VRSN);
         printf (UT_EXTRA_OPTS);
+        printf (UT_IPv46);
 
         printf (UT_HOST_PORT, 'p', DEFAULT_PORT);
 
@@ -1245,5 +1255,5 @@ print_usage (void)
         printf ("[-C community] [-s string] [-r regex] [-R regexi] [-t timeout] [-e retries]\n");
         printf ("[-l label] [-u units] [-p port-number] [-d delimiter] [-D output-delimiter]\n");
         printf ("[-m miblist] [-P snmp version] [-N context] [-L seclevel] [-U secname]\n");
-        printf ("[-a authproto] [-A authpasswd] [-x privproto] [-X privpasswd]\n");
+        printf ("[-a authproto] [-A authpasswd] [-x privproto] [-X privpasswd] [-4|6]\n");
 }
diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c
index 6dc9aa96..61333bd7 100644
--- a/plugins/check_tcp.c
+++ b/plugins/check_tcp.c
@@ -247,8 +247,8 @@ main (int argc, char **argv)
                 }
         }
         if(result != STATE_OK){
-                np_net_ssl_cleanup();
                 if(sd) close(sd);
+                np_net_ssl_cleanup();
                 return result;
         }
 #endif /* HAVE_SSL */
@@ -321,10 +321,10 @@ main (int argc, char **argv)
         if (server_quit != NULL) {
                 my_send(server_quit, strlen(server_quit));
         }
+        if (sd) close (sd);
 #ifdef HAVE_SSL
         np_net_ssl_cleanup();
 #endif
-        if (sd) close (sd);
 
         microsec = deltime (tv);
         elapsed_time = (double)microsec / 1.0e6;
diff --git a/plugins/check_users.c b/plugins/check_users.c
index 54415a48..f6f4b362 100644
--- a/plugins/check_users.c
+++ b/plugins/check_users.c
@@ -54,15 +54,15 @@ int process_arguments (int, char **);
 void print_help (void);
 void print_usage (void);
 
-int wusers = -1;
-int cusers = -1;
+char *warning_range = NULL;
+char *critical_range = NULL;
+thresholds *thlds = NULL;
 
 int
 main (int argc, char **argv)
 {
         int users = -1;
         int result = STATE_UNKNOWN;
-        char *perf;
 #if HAVE_WTSAPI32_H
         WTS_SESSION_INFO *wtsinfo;
         DWORD wtscount;
@@ -77,8 +77,6 @@ main (int argc, char **argv)
         bindtextdomain (PACKAGE, LOCALEDIR);
         textdomain (PACKAGE);
 
-        perf = strdup ("");
-
         /* Parse extra opts if any */
         argv = np_extra_opts (&argc, argv, progname);
 
@@ -160,23 +158,15 @@ main (int argc, char **argv)
 #endif
 
         /* check the user count against warning and critical thresholds */
-        if (users > cusers)
-                result = STATE_CRITICAL;
-        else if (users > wusers)
-                result = STATE_WARNING;
-        else if (users >= 0)
-                result = STATE_OK;
+        result = get_status((double)users, thlds);
 
         if (result == STATE_UNKNOWN)
                 printf ("%s\n", _("Unable to read output"));
         else {
-                xasprintf (&perf, "%s", perfdata ("users", users, "",
-                  TRUE, wusers,
-                  TRUE, cusers,
-                  TRUE, 0,
-                  FALSE, 0));
-                printf (_("USERS %s - %d users currently logged in |%s\n"), state_text (result),
-                  users, perf);
+                printf (_("USERS %s - %d users currently logged in |%s\n"), 
+                                state_text(result), users,
+                                sperfdata_int("users", users, "", warning_range,
+                                                        critical_range, TRUE, 0, FALSE, 0));
         }
 
         return result;
@@ -215,33 +205,27 @@ process_arguments (int argc, char **argv)
                         print_revision (progname, NP_VERSION);
                         exit (STATE_UNKNOWN);
                 case 'c':                                                                       /* critical */
-                        if (!is_intnonneg (optarg))
-                                usage4 (_("Critical threshold must be a positive integer"));
-                        else
-                                cusers = atoi (optarg);
+                        critical_range = optarg;
                         break;
                 case 'w':                                                                       /* warning */
-                        if (!is_intnonneg (optarg))
-                                usage4 (_("Warning threshold must be a positive integer"));
-                        else
-                                wusers = atoi (optarg);
+                        warning_range = optarg;
                         break;
                 }
         }
 
         c = optind;
-        if (wusers == -1 && argc > c) {
-                if (is_intnonneg (argv[c]) == FALSE)
-                        usage4 (_("Warning threshold must be a positive integer"));
-                else
-                        wusers = atoi (argv[c++]);
-        }
-        if (cusers == -1 && argc > c) {
-                if (is_intnonneg (argv[c]) == FALSE)
-                        usage4 (_("Warning threshold must be a positive integer"));
-                else
-                        cusers = atoi (argv[c]);
-        }
+        if (warning_range == NULL && argc > c)
+                warning_range = argv[c++];
+        if (critical_range == NULL && argc > c)
+                critical_range = argv[c++];
+
+        /* this will abort in case of invalid ranges */
+        set_thresholds (&thlds, warning_range, critical_range);
+
+        if (thlds->warning->end < 0)
+                usage4 (_("Warning threshold must be a positive integer"));
+        if (thlds->critical->end < 0)
+                usage4 (_("Critical threshold must be a positive integer"));
 
         return OK;
 }
diff --git a/plugins/common.h b/plugins/common.h
index 01003b3b..8719b502 100644
--- a/plugins/common.h
+++ b/plugins/common.h
@@ -161,6 +161,13 @@
 #  endif
 #endif
 
+/* openssl 1.1 does not set OPENSSL_NO_SSL2 by default but ships without ssl2 */
+#ifdef OPENSSL_VERSION_NUMBER
+#  if OPENSSL_VERSION_NUMBER >= 0x10100000
+#   define OPENSSL_NO_SSL2
+#  endif
+#endif
+
 /*
  *
  * Standard Values
diff --git a/plugins/negate.c b/plugins/negate.c
index beaed1ea..b320e356 100644
--- a/plugins/negate.c
+++ b/plugins/negate.c
@@ -59,8 +59,8 @@ static int state[4] = {
 int
 main (int argc, char **argv)
 {
-        int found = 0, result = STATE_UNKNOWN;
-        char *buf, *sub;
+        int result = STATE_UNKNOWN;
+        char *sub;
         char **command_line;
         output chld_out, chld_err;
         int i;
diff --git a/plugins/netutils.c b/plugins/netutils.c
index 705aaf09..1bb4f076 100644
--- a/plugins/netutils.c
+++ b/plugins/netutils.c
@@ -359,20 +359,21 @@ is_addr (const char *address)
 }
 
 int
-resolve_host_or_addr (const char *address, int family)
+dns_lookup (const char *in, struct sockaddr_storage *ss, int family)
 {
         struct addrinfo hints;
         struct addrinfo *res;
         int retval;
 
-        memset (&hints, 0, sizeof (hints));
+        memset (&hints, 0, sizeof(struct addrinfo));
         hints.ai_family = family;
-        retval = getaddrinfo (address, NULL, &hints, &res);
 
+        retval = getaddrinfo (in, NULL, &hints, &res);
         if (retval != 0)
                 return FALSE;
-        else {
-                freeaddrinfo (res);
-                return TRUE;
-        }
+
+        if (ss != NULL)
+                memcpy (ss, res->ai_addr, res->ai_addrlen);
+        freeaddrinfo (res);
+        return TRUE;
 }
diff --git a/plugins/netutils.h b/plugins/netutils.h
index 2766029e..d7ee0ddd 100644
--- a/plugins/netutils.h
+++ b/plugins/netutils.h
@@ -45,6 +45,10 @@
 # endif /* UNIX_PATH_MAX */
 #endif /* HAVE_SYS_UN_H */
 
+#ifndef HOST_MAX_BYTES
+# define HOST_MAX_BYTES 255
+#endif
+
 /* process_request and wrapper macros */
 #define process_tcp_request(addr, port, sbuf, rbuf, rsize) \
         process_request(addr, port, IPPROTO_TCP, sbuf, rbuf, rsize)
@@ -71,8 +75,9 @@ int send_request (int sd, int proto, const char *send_buffer, char *recv_buffer,
 /* "is_*" wrapper macros and functions */
 int is_host (const char *);
 int is_addr (const char *);
-int resolve_host_or_addr (const char *, int);
+int dns_lookup (const char *, struct sockaddr_storage *, int);
 void host_or_die(const char *str);
+#define resolve_host_or_addr(addr, family) dns_lookup(addr, NULL, family)
 #define is_inet_addr(addr) resolve_host_or_addr(addr, AF_INET)
 #ifdef USE_IPV6
 #  define is_inet6_addr(addr) resolve_host_or_addr(addr, AF_INET6)
diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index 4f9c793c..b412ef3d 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -197,6 +197,7 @@ int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit){
         X509_NAME *subj=NULL;
         char timestamp[50] = "";
         char cn[MAX_CN_LENGTH]= "";
+        char *tz;
         
         int cnlen =-1;
         int status=STATE_UNKNOWN;
@@ -264,10 +265,18 @@ int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit){
                 (tm->data[10 + offset] - '0') * 10 + (tm->data[11 + offset] - '0');
         stamp.tm_isdst = -1;
 
-        time_left = difftime(timegm(&stamp), time(NULL));
+        tm_t = timegm(&stamp);
+        time_left = difftime(tm_t, time(NULL));
         days_left = time_left / 86400;
-        tm_t = mktime (&stamp);
-        strftime(timestamp, 50, "%c", localtime(&tm_t));
+        tz = getenv("TZ");
+        setenv("TZ", "GMT", 1);
+        tzset();
+        strftime(timestamp, 50, "%c %z", localtime(&tm_t));
+        if (tz)
+                setenv("TZ", tz, 1);
+        else
+                unsetenv("TZ");
+        tzset();
 
         if (days_left > 0 && days_left <= days_till_exp_warn) {
                 printf (_("%s - Certificate '%s' expires in %d day(s) (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", cn, days_left, timestamp);
diff --git a/plugins/t/NPTest.cache.travis b/plugins/t/NPTest.cache.travis
index fe8aabdb..5d9c5ff7 100644
--- a/plugins/t/NPTest.cache.travis
+++ b/plugins/t/NPTest.cache.travis
@@ -11,7 +11,7 @@
   'NP_HOST_NONRESPONSIVE' => '10.0.0.1',
   'NP_HOST_RESPONSIVE' => 'localhost',
   'NP_HOST_SMB' => '',
-  'NP_HOST_SNMP' => '',
+  'NP_HOST_SNMP' => 'localhost',
   'NP_HOST_TCP_FTP' => '',
   'NP_HOST_TCP_HPJD' => '',
   'NP_HOST_HPJD_PORT_INVALID' => '161',
@@ -39,7 +39,7 @@
   'NP_SMB_SHARE_SPC' => '',
   'NP_SMB_VALID_USER' => '',
   'NP_SMB_VALID_USER_PASS' => '',
-  'NP_SNMP_COMMUNITY' => '',
+  'NP_SNMP_COMMUNITY' => 'public',
   'NP_SSH_CONFIGFILE' => '~/.ssh/config',
   'NP_SSH_HOST' => 'localhost',
   'NP_SSH_IDENTITY' => '~/.ssh/id_dsa',
diff --git a/plugins/t/check_http.t b/plugins/t/check_http.t
index 2b906e30..5a90f02a 100644
--- a/plugins/t/check_http.t
+++ b/plugins/t/check_http.t
@@ -9,7 +9,7 @@ use Test::More;
 use POSIX qw/mktime strftime/;
 use NPTest;
 
-plan tests => 42;
+plan tests => 49;
 
 my $successOutput = '/OK.*HTTP.*second/';
 
@@ -64,6 +64,32 @@ cmp_ok( $res->return_code, '==', 2, "Webserver $hostname_invalid not valid" );
 # Is also possible to get a socket timeout if DNS is not responding fast enough
 like( $res->output, "/Unable to open TCP socket|Socket timeout after/", "Output OK");
 
+# host header checks
+$res = NPTest->testCmd("./check_http -v -H $host_tcp_http");
+like( $res->output, '/^Host: '.$host_tcp_http.'\s*$/ms', "Host Header OK" );
+
+$res = NPTest->testCmd("./check_http -v -H $host_tcp_http -p 80");
+like( $res->output, '/^Host: '.$host_tcp_http.'\s*$/ms', "Host Header OK" );
+
+$res = NPTest->testCmd("./check_http -v -H $host_tcp_http:8080 -p 80");
+like( $res->output, '/^Host: '.$host_tcp_http.':8080\s*$/ms', "Host Header OK" );
+
+$res = NPTest->testCmd("./check_http -v -H $host_tcp_http:8080 -p 80");
+like( $res->output, '/^Host: '.$host_tcp_http.':8080\s*$/ms', "Host Header OK" );
+
+SKIP: {
+        skip "No internet access", 3 if $internet_access eq "no";
+
+        $res = NPTest->testCmd("./check_http -v -H www.verisign.com -S");
+        like( $res->output, '/^Host: www.verisign.com\s*$/ms', "Host Header OK" );
+
+        $res = NPTest->testCmd("./check_http -v -H www.verisign.com:8080 -S -p 443");
+        like( $res->output, '/^Host: www.verisign.com:8080\s*$/ms', "Host Header OK" );
+
+        $res = NPTest->testCmd("./check_http -v -H www.verisign.com:443 -S -p 443");
+        like( $res->output, '/^Host: www.verisign.com\s*$/ms', "Host Header OK" );
+};
+
 SKIP: {
         skip "No host serving monitoring in index file", 7 unless $host_tcp_http2;
 
@@ -121,9 +147,9 @@ SKIP: {
                 $res = NPTest->testCmd("LC_TIME=C TZ=UTC ./check_http -C 1 www.verisign.com");
                 like($res->output, qr/OK - Certificate 'www.verisign.com' will expire on/, "Catch cert output");
                 is( $res->return_code, 0, "Catch cert output exit code" );
-                my($mon,$day,$hour,$min,$sec,$year) = ($res->output =~ /(\w+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+(\d+)\./);
+                my($mon,$day,$hour,$min,$sec,$year) = ($res->output =~ /(\w+)\s+(\d+)\s+(\d+):(\d+):(\d+)\s+(\d+)/);
                 if(!defined $year) {
-                    die("parsing date failed from: ".$res);
+                    die("parsing date failed from: ".$res->output);
                 }
                 my $months = {'Jan' => 0, 'Feb' => 1, 'Mar' => 2, 'Apr' => 3, 'May' => 4, 'Jun' => 5, 'Jul' => 6, 'Aug' => 7, 'Sep' => 8, 'Oct' => 9, 'Nov' => 10, 'Dec' => 11};
                 my $ts   = mktime($sec, $min, $hour, $day, $months->{$mon}, $year-1900);
diff --git a/plugins/t/check_snmp.t b/plugins/t/check_snmp.t
index aefd872a..eff46ea1 100644
--- a/plugins/t/check_snmp.t
+++ b/plugins/t/check_snmp.t
@@ -10,7 +10,7 @@ use NPTest;
 
 BEGIN {
     plan skip_all => 'check_snmp is not compiled' unless -x "./check_snmp";
-    plan tests => 61;
+    plan tests => 63;
 }
 
 my $res;
@@ -45,7 +45,7 @@ is( $res->return_code, 3, "Invalid protocol" );
 like( $res->output, "/check_snmp: Invalid SNMP version - 3c/" );
 
 SKIP: {
-    skip "no snmp host defined", 48 if ( ! $host_snmp );
+    skip "no snmp host defined", 50 if ( ! $host_snmp );
 
     $res = NPTest->testCmd( "./check_snmp -H $host_snmp -C $snmp_community -o system.sysUpTime.0 -w 1: -c 1:");
     cmp_ok( $res->return_code, '==', 0, "Exit OK when querying uptime" );
@@ -153,6 +153,10 @@ SKIP: {
     $res = NPTest->testCmd( "./check_snmp -H $host_snmp -C $snmp_community -o system.sysUpTime.0");
     cmp_ok( $res->return_code, '==', 0, "Timetick used as a string");
     like($res->output, '/^SNMP OK - Timeticks:\s\(\d+\)\s+(?:\d+ days?,\s+)?\d+:\d+:\d+\.\d+\s.*$/', "Timetick used as a string, result printed rather than parsed");
+
+    $res = NPTest->testCmd( "./check_snmp -H $host_snmp -C $snmp_community -o HOST-RESOURCES-MIB::hrSWRunParameters.1");
+    cmp_ok( $res->return_code, '==', 0, "Timetick used as a string");
+    is( $res->output, 'SNMP OK - "" | ', "snmp response without datatype" );
 }
 
 SKIP: {
diff --git a/plugins/t/check_users.t b/plugins/t/check_users.t
index 39044bb5..088f3b52 100644
--- a/plugins/t/check_users.t
+++ b/plugins/t/check_users.t
@@ -13,7 +13,7 @@ use Test;
 use NPTest;
 
 use vars qw($tests);
-BEGIN {$tests = 4; plan tests => $tests}
+BEGIN {$tests = 8; plan tests => $tests}
 
 my $successOutput = '/^USERS OK - [0-9]+ users currently logged in/';
 my $failureOutput = '/^USERS CRITICAL - [0-9]+ users currently logged in/';
@@ -22,6 +22,8 @@ my $t;
 
 $t += checkCmd( "./check_users 1000 1000", 0, $successOutput );
 $t += checkCmd( "./check_users    0    0", 2, $failureOutput );
+$t += checkCmd( "./check_users -w 0:1000 -c 0:1000", 0, $successOutput );
+$t += checkCmd( "./check_users -w 0:0 -c 0:0", 2, $failureOutput );
 
 exit(0) if defined($Test::Harness::VERSION);
 exit($tests - $t);
diff --git a/plugins/tests/check_http.t b/plugins/tests/check_http.t
index e72d243a..1bc0ecb7 100755
--- a/plugins/tests/check_http.t
+++ b/plugins/tests/check_http.t
@@ -17,6 +17,8 @@ use Test::More;
 use NPTest;
 use FindBin qw($Bin);
 
+$ENV{'LC_TIME'} = "C";
+
 my $common_tests = 70;
 my $ssl_only_tests = 8;
 # Check that all dependent modules are available
@@ -186,21 +188,21 @@ SKIP: {
 
         $result = NPTest->testCmd( "$command -p $port_https -S -C 14" );
         is( $result->return_code, 0, "$command -p $port_https -S -C 14" );
-        is( $result->output, 'OK - Certificate \'Ton Voon\' will expire on Sun Mar  3 21:41:28 2019.', "output ok" );
+        is( $result->output, 'OK - Certificate \'Ton Voon\' will expire on Sun Mar  3 21:41:28 2019 +0000.', "output ok" );
 
         $result = NPTest->testCmd( "$command -p $port_https -S -C 14000" );
         is( $result->return_code, 1, "$command -p $port_https -S -C 14000" );
-        like( $result->output, '/WARNING - Certificate \'Ton Voon\' expires in \d+ day\(s\) \(Sun Mar  3 21:41:28 2019\)./', "output ok" );
+        like( $result->output, '/WARNING - Certificate \'Ton Voon\' expires in \d+ day\(s\) \(Sun Mar  3 21:41:28 2019 \+0000\)./', "output ok" );
 
         # Expired cert tests
         $result = NPTest->testCmd( "$command -p $port_https -S -C 13960,14000" );
         is( $result->return_code, 2, "$command -p $port_https -S -C 13960,14000" );
-        like( $result->output, '/CRITICAL - Certificate \'Ton Voon\' expires in \d+ day\(s\) \(Sun Mar  3 21:41:28 2019\)./', "output ok" );
+        like( $result->output, '/CRITICAL - Certificate \'Ton Voon\' expires in \d+ day\(s\) \(Sun Mar  3 21:41:28 2019 \+0000\)./', "output ok" );
 
         $result = NPTest->testCmd( "$command -p $port_https_expired -S -C 7" );
         is( $result->return_code, 2, "$command -p $port_https_expired -S -C 7" );
         is( $result->output,
-                'CRITICAL - Certificate \'Ton Voon\' expired on Thu Mar  5 00:13:16 2009.',
+                'CRITICAL - Certificate \'Ton Voon\' expired on Thu Mar  5 00:13:16 2009 +0000.',
                 "output ok" );
 
 }
diff --git a/plugins/utils.c b/plugins/utils.c
index a864e4aa..231af92b 100644
--- a/plugins/utils.c
+++ b/plugins/utils.c
@@ -668,3 +668,44 @@ char *sperfdata (const char *label,
 
         return data;
 }
+
+char *sperfdata_int (const char *label,
+ int val,
+ const char *uom,
+ char *warn,
+ char *crit,
+ int minp,
+ int minv,
+ int maxp,
+ int maxv)
+{
+        char *data = NULL;
+        if (strpbrk (label, "'= "))
+                xasprintf (&data, "'%s'=", label);
+        else
+                xasprintf (&data, "%s=", label);
+
+        xasprintf (&data, "%s%d", data, val);
+        xasprintf (&data, "%s%s;", data, uom);
+
+        if (warn!=NULL)
+                xasprintf (&data, "%s%s", data, warn);
+
+        xasprintf (&data, "%s;", data);
+
+        if (crit!=NULL)
+                xasprintf (&data, "%s%s", data, crit);
+
+        xasprintf (&data, "%s;", data);
+
+        if (minp)
+                xasprintf (&data, "%s%d", data, minv);
+
+        if (maxp) {
+                xasprintf (&data, "%s;", data);
+                xasprintf (&data, "%s%d", data, maxv);
+        }
+
+        return data;
+}
+
diff --git a/plugins/utils.h b/plugins/utils.h
index 4c4aaccc..a436e1ca 100644
--- a/plugins/utils.h
+++ b/plugins/utils.h
@@ -94,29 +94,17 @@ const char *state_text (int);
 #define max(a,b) (((a)>(b))?(a):(b))
 #define min(a,b) (((a)<(b))?(a):(b))
 
-char *perfdata (const char *,
- long int,
- const char *,
- int,
- long int,
- int,
- long int,
- int,
- long int,
- int,
- long int);
-
-char *fperfdata (const char *,
- double,
- const char *,
- int,
- double,
- int,
- double,
- int,
- double,
- int,
- double);
+char *perfdata (const char *, long int, const char *, int, long int,
+                int, long int, int, long int, int, long int);
+
+char *fperfdata (const char *, double, const char *, int, double,
+                 int, double, int, double, int, double);
+
+char *sperfdata (const char *, double, const char *, char *, char *,
+                 int, double, int, double);
+
+char *sperfdata_int (const char *, int, const char *, char *, char *,
+                     int, int, int, int);
 
 /* The idea here is that, although not every plugin will use all of these, 
    most will or should.  Therefore, for consistency, these very common