Adding upstream version 2.3.5.upstream/2.3.5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1895 insertions, 0 deletions

diff --git a/plugins/check_http.c b/plugins/check_http.c
new file mode 100644
index 0000000..b9d8145
--- /dev/null
+++ b/plugins/check_http.c
@@ -0,0 +1,1895 @@
+/*****************************************************************************
+*
+* Monitoring check_http plugin
+*
+* License: GPL
+* Copyright (c) 1999-2013 Monitoring Plugins Development Team
+*
+* Description:
+*
+* This file contains the check_http plugin
+*
+* This plugin tests the HTTP service on the specified host. It can test
+* normal (http) and secure (https) servers, follow redirects, search for
+* strings and regular expressions, check connection times, and report on
+* certificate expiration times.
+*
+*
+* 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_http";
+const char *copyright = "1999-2022";
+const char *email = "devel@monitoring-plugins.org";
+
+// Do NOT sort those headers, it will break the build
+// TODO: Fix this
+#include "common.h"
+#include "base64.h"
+#include "netutils.h"
+#include "utils.h"
+#include "base64.h"
+#include <ctype.h>
+
+#define STICKY_NONE 0
+#define STICKY_HOST 1
+#define STICKY_PORT 2
+
+#define HTTP_EXPECT "HTTP/1."
+enum {
+  MAX_IPV4_HOSTLENGTH = 255,
+  HTTP_PORT = 80,
+  HTTPS_PORT = 443,
+  MAX_PORT = 65535,
+  DEFAULT_MAX_REDIRS = 15
+};
+
+#ifdef HAVE_SSL
+bool check_cert = false;
+bool continue_after_check_cert = false;
+int ssl_version = 0;
+int days_till_exp_warn, days_till_exp_crit;
+char *randbuff;
+X509 *server_cert;
+#  define my_recv(buf, len) ((use_ssl) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
+#  define my_send(buf, len) ((use_ssl) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
+#else /* ifndef HAVE_SSL */
+#  define my_recv(buf, len) read(sd, buf, len)
+#  define my_send(buf, len) send(sd, buf, len, 0)
+#endif /* HAVE_SSL */
+bool no_body = false;
+int maximum_age = -1;
+
+enum {
+  REGS = 2,
+  MAX_RE_SIZE = 1024
+};
+#include "regex.h"
+regex_t preg;
+regmatch_t pmatch[REGS];
+char regexp[MAX_RE_SIZE];
+char errbuf[MAX_INPUT_BUFFER];
+int cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
+int errcode;
+int invert_regex = 0;
+
+struct timeval tv;
+struct timeval tv_temp;
+
+#define HTTP_URL "/"
+#define CRLF "\r\n"
+
+bool 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;
+int server_expect_yn = 0;
+char server_expect[MAX_INPUT_BUFFER] = HTTP_EXPECT;
+char header_expect[MAX_INPUT_BUFFER] = "";
+char string_expect[MAX_INPUT_BUFFER] = "";
+char *warning_thresholds = NULL;
+char *critical_thresholds = NULL;
+thresholds *thlds;
+char user_auth[MAX_INPUT_BUFFER] = "";
+char proxy_auth[MAX_INPUT_BUFFER] = "";
+bool display_html = false;
+char **http_opt_headers;
+int http_opt_headers_count = 0;
+int onredirect = STATE_OK;
+int followsticky = STICKY_NONE;
+bool use_ssl = false;
+bool use_sni = false;
+bool verbose = false;
+bool show_extended_perfdata = false;
+bool show_body = false;
+int sd;
+int min_page_len = 0;
+int max_page_len = 0;
+int redir_depth = 0;
+int max_depth = DEFAULT_MAX_REDIRS;
+char *http_method;
+char *http_method_proxy;
+char *http_post_data;
+char *http_content_type;
+char buffer[MAX_INPUT_BUFFER];
+char *client_cert = NULL;
+char *client_privkey = NULL;
+
+// Forward function declarations
+bool process_arguments (int, char **);
+int check_http (void);
+void redir (char *pos, char *status_line);
+bool server_type_check(const char *type);
+int server_port_check(int ssl_flag);
+char *perfd_time (double microsec);
+char *perfd_time_connect (double microsec);
+char *perfd_time_ssl (double microsec);
+char *perfd_time_firstbyte (double microsec);
+char *perfd_time_headers (double microsec);
+char *perfd_time_transfer (double microsec);
+char *perfd_size (int page_len);
+void print_help (void);
+void print_usage (void);
+char *unchunk_content(const char *content);
+
+int
+main (int argc, char **argv)
+{
+  int result = STATE_UNKNOWN;
+
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  /* Set default URL. Must be malloced for subsequent realloc if --onredirect=follow */
+  server_url = strdup(HTTP_URL);
+  server_url_length = strlen(server_url);
+  xasprintf (&user_agent, "User-Agent: check_http/v%s (monitoring-plugins %s)",
+            NP_VERSION, VERSION);
+
+  /* Parse extra opts if any */
+  argv=np_extra_opts (&argc, argv, progname);
+
+  if (process_arguments (argc, argv) == false)
+    usage4 (_("Could not parse arguments"));
+
+  if (display_html == true)
+    printf ("<A HREF=\"%s://%s:%d%s\" target=\"_blank\">",
+      use_ssl ? "https" : "http", host_name ? host_name : server_address,
+      server_port, server_url);
+
+  /* initialize alarm signal handling, set socket timeout, start timer */
+  (void) signal (SIGALRM, socket_timeout_alarm_handler);
+  (void) alarm (socket_timeout);
+  gettimeofday (&tv, NULL);
+
+  result = check_http ();
+  return result;
+}
+
+/* check whether a file exists */
+void
+test_file (char *path)
+{
+  if (access(path, R_OK) == 0)
+    return;
+  usage2 (_("file does not exist or is not readable"), path);
+}
+
+/*
+ * process command-line arguments
+ * returns true on success, false otherwise
+  */
+bool process_arguments (int argc, char **argv)
+{
+  int c = 1;
+  char *p;
+  char *temp;
+
+  enum {
+    INVERT_REGEX = CHAR_MAX + 1,
+    SNI_OPTION,
+    MAX_REDIRS_OPTION,
+    CONTINUE_AFTER_CHECK_CERT
+  };
+
+  int option = 0;
+  static struct option longopts[] = {
+    STD_LONG_OPTS,
+    {"link", no_argument, 0, 'L'},
+    {"nohtml", no_argument, 0, 'n'},
+    {"ssl", optional_argument, 0, 'S'},
+    {"sni", no_argument, 0, SNI_OPTION},
+    {"post", required_argument, 0, 'P'},
+    {"method", required_argument, 0, 'j'},
+    {"IP-address", required_argument, 0, 'I'},
+    {"url", required_argument, 0, 'u'},
+    {"port", required_argument, 0, 'p'},
+    {"authorization", required_argument, 0, 'a'},
+    {"proxy-authorization", required_argument, 0, 'b'},
+    {"header-string", required_argument, 0, 'd'},
+    {"string", required_argument, 0, 's'},
+    {"expect", required_argument, 0, 'e'},
+    {"regex", required_argument, 0, 'r'},
+    {"ereg", required_argument, 0, 'r'},
+    {"eregi", required_argument, 0, 'R'},
+    {"linespan", no_argument, 0, 'l'},
+    {"onredirect", required_argument, 0, 'f'},
+    {"certificate", required_argument, 0, 'C'},
+    {"client-cert", required_argument, 0, 'J'},
+    {"private-key", required_argument, 0, 'K'},
+    {"continue-after-certificate", no_argument, 0, CONTINUE_AFTER_CHECK_CERT},
+    {"useragent", required_argument, 0, 'A'},
+    {"header", required_argument, 0, 'k'},
+    {"no-body", no_argument, 0, 'N'},
+    {"max-age", required_argument, 0, 'M'},
+    {"content-type", required_argument, 0, 'T'},
+    {"pagesize", required_argument, 0, 'm'},
+    {"invert-regex", no_argument, NULL, INVERT_REGEX},
+    {"use-ipv4", no_argument, 0, '4'},
+    {"use-ipv6", no_argument, 0, '6'},
+    {"extended-perfdata", no_argument, 0, 'E'},
+    {"show-body", no_argument, 0, 'B'},
+    {"max-redirs", required_argument, 0, MAX_REDIRS_OPTION},
+    {0, 0, 0, 0}
+  };
+
+  if (argc < 2)
+    return false;
+
+  for (c = 1; c < argc; c++) {
+    if (strcmp ("-to", argv[c]) == 0)
+      strcpy (argv[c], "-t");
+    if (strcmp ("-hn", argv[c]) == 0)
+      strcpy (argv[c], "-H");
+    if (strcmp ("-wt", argv[c]) == 0)
+      strcpy (argv[c], "-w");
+    if (strcmp ("-ct", argv[c]) == 0)
+      strcpy (argv[c], "-c");
+    if (strcmp ("-nohtml", argv[c]) == 0)
+      strcpy (argv[c], "-n");
+  }
+
+  while (1) {
+    c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:j:T:I:a:b:d:e:p:s:R:r:u:f:C:J:K:nlLS::m:M:NEB", longopts, &option);
+    if (c == -1 || c == EOF)
+      break;
+
+    switch (c) {
+    case '?': /* usage */
+      usage5 ();
+      break;
+    case 'h': /* help */
+      print_help ();
+      exit (STATE_UNKNOWN);
+      break;
+    case 'V': /* version */
+      print_revision (progname, NP_VERSION);
+      exit (STATE_UNKNOWN);
+      break;
+    case 't': /* timeout period */
+      if (!is_intnonneg (optarg))
+        usage2 (_("Timeout interval must be a positive integer"), optarg);
+      else
+        socket_timeout = atoi (optarg);
+      break;
+    case 'c': /* critical time threshold */
+      critical_thresholds = optarg;
+      break;
+    case 'w': /* warning time threshold */
+      warning_thresholds = optarg;
+      break;
+    case 'A': /* User Agent String */
+      xasprintf (&user_agent, "User-Agent: %s", optarg);
+      break;
+    case 'k': /* Additional headers */
+      if (http_opt_headers_count == 0)
+        http_opt_headers = malloc (sizeof (char *) * (++http_opt_headers_count));
+      else
+        http_opt_headers = realloc (http_opt_headers, sizeof (char *) * (++http_opt_headers_count));
+      http_opt_headers[http_opt_headers_count - 1] = optarg;
+      /* xasprintf (&http_opt_headers, "%s", optarg); */
+      break;
+    case 'L': /* show html link */
+      display_html = true;
+      break;
+    case 'n': /* do not show html link */
+      display_html = false;
+      break;
+    case 'C': /* Check SSL cert validity */
+#ifdef HAVE_SSL
+      if ((temp=strchr(optarg,','))!=NULL) {
+        *temp='\0';
+        if (!is_intnonneg (optarg))
+          usage2 (_("Invalid certificate expiration period"), optarg);
+        days_till_exp_warn = atoi(optarg);
+        *temp=',';
+        temp++;
+        if (!is_intnonneg (temp))
+          usage2 (_("Invalid certificate expiration period"), temp);
+        days_till_exp_crit = atoi (temp);
+      }
+      else {
+        days_till_exp_crit=0;
+        if (!is_intnonneg (optarg))
+          usage2 (_("Invalid certificate expiration period"), optarg);
+        days_till_exp_warn = atoi (optarg);
+      }
+      check_cert = true;
+      goto enable_ssl;
+#endif
+    case CONTINUE_AFTER_CHECK_CERT: /* don't stop after the certificate is checked */
+#ifdef HAVE_SSL
+      continue_after_check_cert = true;
+      break;
+#endif
+    case 'J': /* use client certificate */
+#ifdef HAVE_SSL
+      test_file(optarg);
+      client_cert = optarg;
+      goto enable_ssl;
+#endif
+    case 'K': /* use client private key */
+#ifdef HAVE_SSL
+      test_file(optarg);
+      client_privkey = optarg;
+      goto enable_ssl;
+#endif
+    case 'S': /* use SSL */
+#ifdef HAVE_SSL
+    enable_ssl:
+      /* ssl_version initialized to 0 as a default. Only set if it's non-zero.  This helps when we include multiple
+         parameters, like -S and -C combinations */
+      use_ssl = true;
+      if (c=='S' && optarg != NULL) {
+        int got_plus = strchr(optarg, '+') != NULL;
+
+        if (!strncmp (optarg, "1.2", 3))
+          ssl_version = got_plus ? MP_TLSv1_2_OR_NEWER : MP_TLSv1_2;
+        else if (!strncmp (optarg, "1.1", 3))
+          ssl_version = got_plus ? MP_TLSv1_1_OR_NEWER : MP_TLSv1_1;
+        else if (optarg[0] == '1')
+          ssl_version = got_plus ? MP_TLSv1_OR_NEWER : MP_TLSv1;
+        else if (optarg[0] == '3')
+          ssl_version = got_plus ? MP_SSLv3_OR_NEWER : MP_SSLv3;
+        else if (optarg[0] == '2')
+          ssl_version = got_plus ? MP_SSLv2_OR_NEWER : MP_SSLv2;
+        else
+          usage4 (_("Invalid option - Valid SSL/TLS versions: 2, 3, 1, 1.1, 1.2 (with optional '+' suffix)"));
+      }
+      if (specify_port == false)
+        server_port = HTTPS_PORT;
+#else
+      /* -C -J and -K fall through to here without SSL */
+      usage4 (_("Invalid option - SSL is not available"));
+#endif
+      break;
+    case SNI_OPTION:
+      use_sni = true;
+      break;
+    case MAX_REDIRS_OPTION:
+      if (!is_intnonneg (optarg))
+        usage2 (_("Invalid max_redirs count"), optarg);
+      else {
+        max_depth = atoi (optarg);
+      }
+      break;    
+    case 'f': /* onredirect */
+      if (!strcmp (optarg, "stickyport"))
+        onredirect = STATE_DEPENDENT, followsticky = STICKY_HOST|STICKY_PORT;
+      else if (!strcmp (optarg, "sticky"))
+        onredirect = STATE_DEPENDENT, followsticky = STICKY_HOST;
+      else if (!strcmp (optarg, "follow"))
+        onredirect = STATE_DEPENDENT, followsticky = STICKY_NONE;
+      else if (!strcmp (optarg, "unknown"))
+        onredirect = STATE_UNKNOWN;
+      else if (!strcmp (optarg, "ok"))
+        onredirect = STATE_OK;
+      else if (!strcmp (optarg, "warning"))
+        onredirect = STATE_WARNING;
+      else if (!strcmp (optarg, "critical"))
+        onredirect = STATE_CRITICAL;
+      else usage2 (_("Invalid onredirect option"), optarg);
+      if (verbose)
+        printf(_("option f:%d \n"), onredirect);
+      break;
+    /* Note: H, I, and u must be malloc'd or will fail on redirects */
+    case 'H': /* Host Name (virtual host) */
+      host_name = strdup (optarg);
+      if (host_name[0] == '[') {
+        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 */
+          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);
+      break;
+    case 'u': /* URL path */
+      server_url = strdup (optarg);
+      server_url_length = strlen (server_url);
+      break;
+    case 'p': /* Server port */
+      if (!is_intnonneg (optarg))
+        usage2 (_("Invalid port number"), optarg);
+      else {
+        server_port = atoi (optarg);
+        specify_port = true;
+      }
+      break;
+    case 'a': /* authorization info */
+      strncpy (user_auth, optarg, MAX_INPUT_BUFFER - 1);
+      user_auth[MAX_INPUT_BUFFER - 1] = 0;
+      break;
+    case 'b': /* proxy-authorization info */
+      strncpy (proxy_auth, optarg, MAX_INPUT_BUFFER - 1);
+      proxy_auth[MAX_INPUT_BUFFER - 1] = 0;
+      break;
+    case 'P': /* HTTP POST data in URL encoded format; ignored if settings already */
+      if (! http_post_data)
+        http_post_data = strdup (optarg);
+      if (! http_method)
+        http_method = strdup("POST");
+      break;
+    case 'j': /* Set HTTP method */
+      if (http_method)
+        free(http_method);
+      http_method = strdup (optarg);
+      char *tmp;
+      if ((tmp = strstr(http_method, ":")) > 0) {
+        tmp[0] = '\0';
+        http_method = http_method;
+        http_method_proxy = ++tmp;
+      }
+      break;
+    case 'd': /* string or substring */
+      strncpy (header_expect, optarg, MAX_INPUT_BUFFER - 1);
+      header_expect[MAX_INPUT_BUFFER - 1] = 0;
+      break;
+    case 's': /* string or substring */
+      strncpy (string_expect, optarg, MAX_INPUT_BUFFER - 1);
+      string_expect[MAX_INPUT_BUFFER - 1] = 0;
+      break;
+    case 'e': /* string or substring */
+      strncpy (server_expect, optarg, MAX_INPUT_BUFFER - 1);
+      server_expect[MAX_INPUT_BUFFER - 1] = 0;
+      server_expect_yn = 1;
+      break;
+    case 'T': /* Content-type */
+      xasprintf (&http_content_type, "%s", optarg);
+      break;
+    case 'l': /* linespan */
+      cflags &= ~REG_NEWLINE;
+      break;
+    case 'R': /* regex */
+      cflags |= REG_ICASE;
+			// fall through
+    case 'r': /* regex */
+      strncpy (regexp, optarg, MAX_RE_SIZE - 1);
+      regexp[MAX_RE_SIZE - 1] = 0;
+      errcode = regcomp (&preg, regexp, cflags);
+      if (errcode != 0) {
+        (void) regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
+        printf (_("Could Not Compile Regular Expression: %s"), errbuf);
+        return false;
+      }
+      break;
+    case INVERT_REGEX:
+      invert_regex = 1;
+      break;
+    case '4':
+      address_family = AF_INET;
+      break;
+    case '6':
+#ifdef USE_IPV6
+      address_family = AF_INET6;
+#else
+      usage4 (_("IPv6 support not available"));
+#endif
+      break;
+    case 'v': /* verbose */
+      verbose = true;
+      break;
+    case 'm': /* min_page_length */
+      {
+      char *tmp;
+      if (strchr(optarg, ':') != (char *)NULL) {
+        /* range, so get two values, min:max */
+        tmp = strtok(optarg, ":");
+        if (tmp == NULL) {
+          printf("Bad format: try \"-m min:max\"\n");
+          exit (STATE_WARNING);
+        } else
+          min_page_len = atoi(tmp);
+
+        tmp = strtok(NULL, ":");
+        if (tmp == NULL) {
+          printf("Bad format: try \"-m min:max\"\n");
+          exit (STATE_WARNING);
+        } else
+          max_page_len = atoi(tmp);
+      } else
+        min_page_len = atoi (optarg);
+      break;
+      }
+    case 'N': /* no-body */
+      no_body = true;
+      break;
+    case 'M': /* max-age */
+                  {
+                    int L = strlen(optarg);
+                    if (L && optarg[L-1] == 'm')
+                      maximum_age = atoi (optarg) * 60;
+                    else if (L && optarg[L-1] == 'h')
+                      maximum_age = atoi (optarg) * 60 * 60;
+                    else if (L && optarg[L-1] == 'd')
+                      maximum_age = atoi (optarg) * 60 * 60 * 24;
+                    else if (L && (optarg[L-1] == 's' ||
+                                   isdigit (optarg[L-1])))
+                      maximum_age = atoi (optarg);
+                    else {
+                      fprintf (stderr, "unparsable max-age: %s\n", optarg);
+                      exit (STATE_WARNING);
+                    }
+                  }
+                  break;
+    case 'E': /* show extended perfdata */
+      show_extended_perfdata = true;
+      break;
+    case 'B': /* print body content after status line */
+      show_body = true;
+      break;
+    }
+  }
+
+  c = optind;
+
+  if (server_address == NULL && c < argc)
+    server_address = strdup (argv[c++]);
+
+  if (host_name == NULL && c < argc)
+    host_name = strdup (argv[c++]);
+
+  if (server_address == NULL) {
+    if (host_name == NULL)
+      usage4 (_("You must specify a server address or host name"));
+    else
+      server_address = strdup (host_name);
+  }
+
+  set_thresholds(&thlds, warning_thresholds, critical_thresholds);
+
+  if (critical_thresholds && thlds->critical->end>(double)socket_timeout)
+    socket_timeout = (int)thlds->critical->end + 1;
+
+  if (http_method == NULL)
+    http_method = strdup ("GET");
+
+  if (http_method_proxy == NULL)
+    http_method_proxy = strdup ("GET");
+
+  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;
+}
+
+
+
+/* Returns 1 if we're done processing the document body; 0 to keep going */
+static int
+document_headers_done (char *full_page)
+{
+  const char *body;
+
+  for (body = full_page; *body; body++) {
+    if (!strncmp (body, "\n\n", 2) || !strncmp (body, "\n\r\n", 3))
+      break;
+  }
+
+  if (!*body)
+    return 0;  /* haven't read end of headers yet */
+
+  full_page[body - full_page] = 0;
+  return 1;
+}
+
+static time_t
+parse_time_string (const char *string)
+{
+  struct tm tm;
+  time_t t;
+  memset (&tm, 0, sizeof(tm));
+
+  /* Like this: Tue, 25 Dec 2001 02:59:03 GMT */
+
+  if (isupper (string[0])  &&  /* Tue */
+    islower (string[1])  &&
+    islower (string[2])  &&
+    ',' ==   string[3]   &&
+    ' ' ==   string[4]   &&
+    (isdigit(string[5]) || string[5] == ' ') &&   /* 25 */
+    isdigit (string[6])  &&
+    ' ' ==   string[7]   &&
+    isupper (string[8])  &&  /* Dec */
+    islower (string[9])  &&
+    islower (string[10]) &&
+    ' ' ==   string[11]  &&
+    isdigit (string[12]) &&  /* 2001 */
+    isdigit (string[13]) &&
+    isdigit (string[14]) &&
+    isdigit (string[15]) &&
+    ' ' ==   string[16]  &&
+    isdigit (string[17]) &&  /* 02: */
+    isdigit (string[18]) &&
+    ':' ==   string[19]  &&
+    isdigit (string[20]) &&  /* 59: */
+    isdigit (string[21]) &&
+    ':' ==   string[22]  &&
+    isdigit (string[23]) &&  /* 03 */
+    isdigit (string[24]) &&
+    ' ' ==   string[25]  &&
+    'G' ==   string[26]  &&  /* GMT */
+    'M' ==   string[27]  &&  /* GMT */
+    'T' ==   string[28]) {
+
+    tm.tm_sec  = 10 * (string[23]-'0') + (string[24]-'0');
+    tm.tm_min  = 10 * (string[20]-'0') + (string[21]-'0');
+    tm.tm_hour = 10 * (string[17]-'0') + (string[18]-'0');
+    tm.tm_mday = 10 * (string[5] == ' ' ? 0 : string[5]-'0') + (string[6]-'0');
+    tm.tm_mon = (!strncmp (string+8, "Jan", 3) ? 0 :
+      !strncmp (string+8, "Feb", 3) ? 1 :
+      !strncmp (string+8, "Mar", 3) ? 2 :
+      !strncmp (string+8, "Apr", 3) ? 3 :
+      !strncmp (string+8, "May", 3) ? 4 :
+      !strncmp (string+8, "Jun", 3) ? 5 :
+      !strncmp (string+8, "Jul", 3) ? 6 :
+      !strncmp (string+8, "Aug", 3) ? 7 :
+      !strncmp (string+8, "Sep", 3) ? 8 :
+      !strncmp (string+8, "Oct", 3) ? 9 :
+      !strncmp (string+8, "Nov", 3) ? 10 :
+      !strncmp (string+8, "Dec", 3) ? 11 :
+      -1);
+    tm.tm_year = ((1000 * (string[12]-'0') +
+      100 * (string[13]-'0') +
+      10 * (string[14]-'0') +
+      (string[15]-'0'))
+      - 1900);
+
+    tm.tm_isdst = 0;  /* GMT is never in DST, right? */
+
+    if (tm.tm_mon < 0 || tm.tm_mday < 1 || tm.tm_mday > 31)
+      return 0;
+
+    /*
+    This is actually wrong: we need to subtract the local timezone
+    offset from GMT from this value.  But, that's ok in this usage,
+    because we only comparing these two GMT dates against each other,
+    so it doesn't matter what time zone we parse them in.
+    */
+
+    t = mktime (&tm);
+    if (t == (time_t) -1) t = 0;
+
+    if (verbose) {
+      const char *s = string;
+      while (*s && *s != '\r' && *s != '\n')
+      fputc (*s++, stdout);
+      printf (" ==> %lu\n", (unsigned long) t);
+    }
+
+    return t;
+
+  } else {
+    return 0;
+  }
+}
+
+/* Checks if the server 'reply' is one of the expected 'statuscodes' */
+static int
+expected_statuscode (const char *reply, const char *statuscodes)
+{
+  char *expected, *code;
+  int result = 0;
+
+  if ((expected = strdup (statuscodes)) == NULL)
+    die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
+
+  for (code = strtok (expected, ","); code != NULL; code = strtok (NULL, ","))
+    if (strstr (reply, code) != NULL) {
+      result = 1;
+      break;
+    }
+
+  free (expected);
+  return result;
+}
+
+static int
+check_document_dates (const char *headers, char **msg)
+{
+  const char *s;
+  char *server_date = 0;
+  char *document_date = 0;
+  int date_result = STATE_OK;
+
+  s = headers;
+  while (*s) {
+    const char *field = s;
+    const char *value = 0;
+
+    /* Find the end of the header field */
+    while (*s && !isspace(*s) && *s != ':')
+      s++;
+
+    /* Remember the header value, if any. */
+    if (*s == ':')
+      value = ++s;
+
+    /* Skip to the end of the header, including continuation lines. */
+    while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
+      s++;
+
+    /* Avoid stepping over end-of-string marker */
+    if (*s)
+      s++;
+
+    /* Process this header. */
+    if (value && value > field+2) {
+      char *ff = (char *) malloc (value-field);
+      char *ss = ff;
+      while (field < value-1)
+        *ss++ = tolower(*field++);
+      *ss++ = 0;
+
+      if (!strcmp (ff, "date") || !strcmp (ff, "last-modified")) {
+        const char *e;
+        while (*value && isspace (*value))
+          value++;
+        for (e = value; *e && *e != '\r' && *e != '\n'; e++)
+          ;
+        ss = (char *) malloc (e - value + 1);
+        strncpy (ss, value, e - value);
+        ss[e - value] = 0;
+        if (!strcmp (ff, "date")) {
+          if (server_date) free (server_date);
+          server_date = ss;
+        } else {
+          if (document_date) free (document_date);
+          document_date = ss;
+        }
+      }
+      free (ff);
+    }
+  }
+
+  /* Done parsing the body.  Now check the dates we (hopefully) parsed.  */
+  if (!server_date || !*server_date) {
+    xasprintf (msg, _("%sServer date unknown, "), *msg);
+    date_result = max_state_alt(STATE_UNKNOWN, date_result);
+  } else if (!document_date || !*document_date) {
+    xasprintf (msg, _("%sDocument modification date unknown, "), *msg);
+    date_result = max_state_alt(STATE_CRITICAL, date_result);
+  } else {
+    time_t srv_data = parse_time_string (server_date);
+    time_t doc_data = parse_time_string (document_date);
+
+    if (srv_data <= 0) {
+      xasprintf (msg, _("%sServer date \"%100s\" unparsable, "), *msg, server_date);
+      date_result = max_state_alt(STATE_CRITICAL, date_result);
+    } else if (doc_data <= 0) {
+      xasprintf (msg, _("%sDocument date \"%100s\" unparsable, "), *msg, document_date);
+      date_result = max_state_alt(STATE_CRITICAL, date_result);
+    } else if (doc_data > srv_data + 30) {
+      xasprintf (msg, _("%sDocument is %d seconds in the future, "), *msg, (int)doc_data - (int)srv_data);
+      date_result = max_state_alt(STATE_CRITICAL, date_result);
+    } else if (doc_data < srv_data - maximum_age) {
+      int n = (srv_data - doc_data);
+      if (n > (60 * 60 * 24 * 2)) {
+        xasprintf (msg, _("%sLast modified %.1f days ago, "), *msg, ((float) n) / (60 * 60 * 24));
+        date_result = max_state_alt(STATE_CRITICAL, date_result);
+      } else {
+        xasprintf (msg, _("%sLast modified %d:%02d:%02d ago, "), *msg, n / (60 * 60), (n / 60) % 60, n % 60);
+        date_result = max_state_alt(STATE_CRITICAL, date_result);
+      }
+    }
+    free (server_date);
+    free (document_date);
+  }
+  return date_result;
+}
+
+int
+get_content_length (const char *headers)
+{
+  const char *s;
+  int content_length = 0;
+
+  s = headers;
+  while (*s) {
+    const char *field = s;
+    const char *value = 0;
+
+    /* Find the end of the header field */
+    while (*s && !isspace(*s) && *s != ':')
+      s++;
+
+    /* Remember the header value, if any. */
+    if (*s == ':')
+      value = ++s;
+
+    /* Skip to the end of the header, including continuation lines. */
+    while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
+      s++;
+
+    /* Avoid stepping over end-of-string marker */
+    if (*s)
+      s++;
+
+    /* Process this header. */
+    if (value && value > field+2) {
+      char *ff = (char *) malloc (value-field);
+      char *ss = ff;
+      while (field < value-1)
+        *ss++ = tolower(*field++);
+      *ss++ = 0;
+
+      if (!strcmp (ff, "content-length")) {
+        const char *e;
+        while (*value && isspace (*value))
+          value++;
+        for (e = value; *e && *e != '\r' && *e != '\n'; e++)
+          ;
+        ss = (char *) malloc (e - value + 1);
+        strncpy (ss, value, e - value);
+        ss[e - value] = 0;
+        content_length = atoi(ss);
+        free (ss);
+      }
+      free (ff);
+    }
+  }
+  return (content_length);
+}
+
+char *
+prepend_slash (char *path)
+{
+  char *newpath;
+
+  if (path[0] == '/')
+    return path;
+
+  if ((newpath = malloc (strlen(path) + 2)) == NULL)
+    die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
+  newpath[0] = '/';
+  strcpy (newpath + 1, path);
+  free (path);
+  return newpath;
+}
+
+int
+check_http (void)
+{
+  char *msg;
+  char *status_line;
+  char *status_code;
+  char *header;
+  char *page;
+  char *auth;
+  int http_status;
+  int i = 0;
+  size_t pagesize = 0;
+  char *full_page;
+  char *full_page_new;
+  char *buf;
+  char *pos;
+  long microsec = 0L;
+  double elapsed_time = 0.0;
+  long microsec_connect = 0L;
+  double elapsed_time_connect = 0.0;
+  long microsec_ssl = 0L;
+  double elapsed_time_ssl = 0.0;
+  long microsec_firstbyte = 0L;
+  double elapsed_time_firstbyte = 0.0;
+  long microsec_headers = 0L;
+  double elapsed_time_headers = 0.0;
+  long microsec_transfer = 0L;
+  double elapsed_time_transfer = 0.0;
+  int page_len = 0;
+  int result = STATE_OK;
+  char *force_host_header = NULL;
+
+  /* try to connect to the host at the given port number */
+  gettimeofday (&tv_temp, NULL);
+  if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
+    die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n"));
+  microsec_connect = deltime (tv_temp);
+
+    /* if we are called with the -I option, the -j method is CONNECT and */
+    /* we received -S for SSL, then we tunnel the request through a proxy*/
+    /* @20100414, public[at]frank4dd.com, http://www.frank4dd.com/howto  */
+
+    if ( server_address != NULL && strcmp(http_method, "CONNECT") == 0
+      && host_name != NULL && use_ssl == true) {
+
+    if (verbose) printf ("Entering CONNECT tunnel mode with proxy %s:%d to dst %s:%d\n", server_address, server_port, host_name, HTTPS_PORT);
+    asprintf (&buf, "%s %s:%d HTTP/1.1\r\n%s\r\n", http_method, host_name, HTTPS_PORT, user_agent);
+    if (strlen(proxy_auth)) {
+      base64_encode_alloc (proxy_auth, strlen (proxy_auth), &auth);
+      xasprintf (&buf, "%sProxy-Authorization: Basic %s\r\n", buf, auth);
+    }
+    /* optionally send any other header tag */
+    if (http_opt_headers_count) {
+      for (i = 0; i < http_opt_headers_count ; i++) {
+        if (force_host_header != http_opt_headers[i]) {
+          xasprintf (&buf, "%s%s\r\n", buf, http_opt_headers[i]);
+        }
+      }
+      /* This cannot be free'd here because a redirection will then try to access this and segfault */
+      /* Covered in a testcase in tests/check_http.t */
+      /* free(http_opt_headers); */
+    }
+    asprintf (&buf, "%sProxy-Connection: keep-alive\r\n", buf);
+    asprintf (&buf, "%sHost: %s\r\n", buf, host_name);
+    /* we finished our request, send empty line with CRLF */
+    asprintf (&buf, "%s%s", buf, CRLF);
+    if (verbose) printf ("%s\n", buf);
+    send(sd, buf, strlen (buf), 0);
+    buf[0]='\0';
+
+    if (verbose) printf ("Receive response from proxy\n");
+    read (sd, buffer, MAX_INPUT_BUFFER-1);
+    if (verbose) printf ("%s", buffer);
+    /* Here we should check if we got HTTP/1.1 200 Connection established */
+  }
+#ifdef HAVE_SSL
+  elapsed_time_connect = (double)microsec_connect / 1.0e6;
+  if (use_ssl == true) {
+    gettimeofday (&tv_temp, NULL);
+    result = np_net_ssl_init_with_hostname_version_and_cert(sd, (use_sni ? host_name : NULL), ssl_version, client_cert, client_privkey);
+    if (verbose) printf ("SSL initialized\n");
+    if (result != STATE_OK)
+      die (STATE_CRITICAL, NULL);
+    microsec_ssl = deltime (tv_temp);
+    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);
+      if (continue_after_check_cert == false) {
+        if (sd) close(sd);
+        np_net_ssl_cleanup();
+        return result;
+      }
+    }
+  }
+#endif /* HAVE_SSL */
+
+  if ( server_address != NULL && strcmp(http_method, "CONNECT") == 0
+       && host_name != NULL && use_ssl == true)
+    asprintf (&buf, "%s %s %s\r\n%s\r\n", http_method_proxy, server_url, host_name ? "HTTP/1.1" : "HTTP/1.0", user_agent);
+  else
+    asprintf (&buf, "%s %s %s\r\n%s\r\n", http_method, server_url, host_name ? "HTTP/1.1" : "HTTP/1.0", user_agent);
+
+  /* tell HTTP/1.1 servers not to keep the connection alive */
+  xasprintf (&buf, "%sConnection: close\r\n", buf);
+
+  /* check if Host header is explicitly set in options */
+  if (http_opt_headers_count) {
+    for (i = 0; i < http_opt_headers_count ; i++) {
+      if (strncmp(http_opt_headers[i], "Host:", 5) == 0) {
+        force_host_header = http_opt_headers[i];
+      }
+    }
+  }
+
+  /* optionally send the host header info */
+  if (host_name) {
+    if (force_host_header) {
+      xasprintf (&buf, "%s%s\r\n", buf, force_host_header);
+    }
+    else {
+      /*
+       * Specify the port only if we're using a non-default port (see RFC 2616,
+       * 14.23).  Some server applications/configurations cause trouble if the
+       * (default) port is explicitly specified in the "Host:" header line.
+       */
+      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, virtual_port);
+    }
+  }
+
+  /* optionally send any other header tag */
+  if (http_opt_headers_count) {
+    for (i = 0; i < http_opt_headers_count ; i++) {
+      if (force_host_header != http_opt_headers[i]) {
+        xasprintf (&buf, "%s%s\r\n", buf, http_opt_headers[i]);
+      }
+    }
+    /* This cannot be free'd here because a redirection will then try to access this and segfault */
+    /* Covered in a testcase in tests/check_http.t */
+    /* free(http_opt_headers); */
+  }
+
+  /* optionally send the authentication info */
+  if (strlen(user_auth)) {
+    base64_encode_alloc (user_auth, strlen (user_auth), &auth);
+    xasprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
+  }
+
+  /* optionally send the proxy authentication info */
+  if (strlen(proxy_auth)) {
+    base64_encode_alloc (proxy_auth, strlen (proxy_auth), &auth);
+    xasprintf (&buf, "%sProxy-Authorization: Basic %s\r\n", buf, auth);
+  }
+
+  /* either send http POST data (any data, not only POST)*/
+  if (http_post_data) {
+    if (http_content_type) {
+      xasprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
+    } else {
+      xasprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
+    }
+
+    xasprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, (int)strlen (http_post_data));
+    xasprintf (&buf, "%s%s", buf, http_post_data);
+  } else {
+    /* or just a newline so the server knows we're done with the request */
+    xasprintf (&buf, "%s%s", buf, CRLF);
+  }
+
+  if (verbose) printf ("%s\n", buf);
+  gettimeofday (&tv_temp, NULL);
+  my_send (buf, strlen (buf));
+  microsec_headers = deltime (tv_temp);
+  elapsed_time_headers = (double)microsec_headers / 1.0e6;
+
+  /* fetch the page */
+  full_page = strdup("");
+  gettimeofday (&tv_temp, NULL);
+  while ((i = my_recv (buffer, MAX_INPUT_BUFFER-1)) > 0) {
+    if ((i >= 1) && (elapsed_time_firstbyte <= 0.000001)) {
+      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';
+
+    if ((full_page_new = realloc(full_page, pagesize + i + 1)) == NULL)
+        die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate memory for full_page\n"));
+
+    memmove(&full_page_new[pagesize], buffer, i + 1);
+
+    full_page = full_page_new;
+
+    pagesize += i;
+
+                if (no_body && document_headers_done (full_page)) {
+                  i = 0;
+                  break;
+                }
+  }
+  microsec_transfer = deltime (tv_temp);
+  elapsed_time_transfer = (double)microsec_transfer / 1.0e6;
+
+  if (i < 0 && errno != ECONNRESET) {
+    die(STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
+  }
+
+  /* return a CRITICAL status if we couldn't read any data */
+  if (pagesize == (size_t) 0)
+    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
+
+  /* Save check time */
+  microsec = deltime (tv);
+  elapsed_time = (double)microsec / 1.0e6;
+
+  /* leave full_page untouched so we can free it later */
+  page = full_page;
+
+  if (verbose)
+    printf ("%s://%s:%d%s is %d characters\n",
+      use_ssl ? "https" : "http", server_address,
+      server_port, server_url, (int)pagesize);
+
+  /* find status line and null-terminate it */
+  status_line = page;
+  page += (size_t) strcspn (page, "\r\n");
+  pos = page;
+  page += (size_t) strspn (page, "\r\n");
+  status_line[strcspn(status_line, "\r\n")] = 0;
+  strip (status_line);
+  if (verbose)
+    printf ("STATUS: %s\n", status_line);
+
+  /* find header info and null-terminate it */
+  header = page;
+  while (strcspn (page, "\r\n") > 0) {
+    page += (size_t) strcspn (page, "\r\n");
+    pos = page;
+    if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
+        (strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
+      page += (size_t) 2;
+    else
+      page += (size_t) 1;
+  }
+  page += (size_t) strspn (page, "\r\n");
+  header[pos - header] = 0;
+  if (verbose)
+    printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
+                (no_body ? "  [[ skipped ]]" : page));
+
+  /* make sure the status line matches the response we are looking for */
+  if (!expected_statuscode (status_line, server_expect)) {
+    if (server_port == HTTP_PORT)
+      xasprintf (&msg,
+                _("Invalid HTTP response received from host: %s\n"),
+                status_line);
+    else
+      xasprintf (&msg,
+                _("Invalid HTTP response received from host on port %d: %s\n"),
+                server_port, status_line);
+    if (show_body)
+        xasprintf (&msg, _("%s\n%s"), msg, page);
+    die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
+  }
+
+  /* Bypass normal status line check if server_expect was set by user and not default */
+  /* NOTE: After this if/else block msg *MUST* be an asprintf-allocated string */
+  if ( server_expect_yn  )  {
+    xasprintf (&msg,
+              _("Status line output matched \"%s\" - "), server_expect);
+    if (verbose)
+      printf ("%s\n",msg);
+  }
+  else {
+    /* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
+    /* HTTP-Version   = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
+    /* Status-Code = 3 DIGITS */
+
+    status_code = strchr (status_line, ' ') + sizeof (char);
+    if (strspn (status_code, "1234567890") != 3)
+      die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);
+
+    http_status = atoi (status_code);
+
+    /* check the return code */
+
+    if (http_status >= 600 || http_status < 100) {
+      die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);
+    }
+    /* server errors result in a critical state */
+    else if (http_status >= 500) {
+      xasprintf (&msg, _("%s - "), status_line);
+      result = STATE_CRITICAL;
+    }
+    /* client errors result in a warning state */
+    else if (http_status >= 400) {
+      xasprintf (&msg, _("%s - "), status_line);
+      result = max_state_alt(STATE_WARNING, result);
+    }
+    /* check redirected page if specified */
+    else if (http_status >= 300) {
+
+      if (onredirect == STATE_DEPENDENT)
+        redir (header, status_line);
+      else
+        result = max_state_alt(onredirect, result);
+      xasprintf (&msg, _("%s - "), status_line);
+    } /* end if (http_status >= 300) */
+    else {
+      /* Print OK status anyway */
+      xasprintf (&msg, _("%s - "), status_line);
+    }
+
+  } /* end else (server_expect_yn)  */
+
+  /* reset the alarm - must be called *after* redir or we'll never die on redirects! */
+  alarm (0);
+
+  if (maximum_age >= 0) {
+    result = max_state_alt(check_document_dates(header, &msg), result);
+  }
+
+  /* Page and Header content checks go here */
+  if (strlen(header_expect) > 0) {
+    if (strstr(header, header_expect) == NULL) {
+      // We did not find the header, the rest is for building the output and setting the state
+      char output_header_search[30] = "";
+
+      strncpy(&output_header_search[0], header_expect,
+              sizeof(output_header_search));
+
+      if (output_header_search[sizeof(output_header_search) - 1] != '\0') {
+        bcopy("...",
+            &output_header_search[sizeof(output_header_search) - 4],
+            4);
+      }
+
+      xasprintf (&msg,
+          _("%sheader '%s' not found on '%s://%s:%d%s', "),
+          msg,
+          output_header_search, use_ssl ? "https" : "http",
+          host_name ? host_name : server_address, server_port,
+          server_url);
+
+      result = STATE_CRITICAL;
+    }
+  }
+
+  // At this point we should test if the content is chunked and unchunk it, so
+  // it can be searched (and possibly printed)
+  const char *chunked_header_regex_string = "Transfer-Encoding: *chunked *";
+  regex_t chunked_header_regex;
+
+  if (regcomp(&chunked_header_regex, chunked_header_regex_string, REG_ICASE)) {
+    die(STATE_UNKNOWN, "HTTP %s: %s\n", state_text(STATE_UNKNOWN), "Failed to compile chunked_header_regex regex");
+  }
+
+  regmatch_t chre_pmatch[1]; // We actually do not care about this, since we only want to know IF it was found
+
+  if (!no_body && regexec(&chunked_header_regex, header, 1, chre_pmatch, 0) == 0) {
+    if (verbose) {
+      printf("Found chunked content\n");
+    }
+    // We actually found the chunked header
+    char *tmp = unchunk_content(page);
+    if (tmp == NULL) {
+      die(STATE_UNKNOWN, "HTTP %s: %s\n", state_text(STATE_UNKNOWN), "Failed to unchunk message body");
+    }
+    page = tmp;
+  }
+
+  if (strlen(string_expect) > 0) {
+    if (!strstr(page, string_expect)) {
+      // We found the string the body, the rest is for building the output
+      char output_string_search[30] = "";
+      strncpy(&output_string_search[0], string_expect,
+              sizeof(output_string_search));
+      if (output_string_search[sizeof(output_string_search) - 1] != '\0') {
+        bcopy("...", &output_string_search[sizeof(output_string_search) - 4],
+              4);
+      }
+      xasprintf (&msg, _("%sstring '%s' not found on '%s://%s:%d%s', "), msg, output_string_search, use_ssl ? "https" : "http", host_name ? host_name : server_address, server_port, server_url);
+      result = STATE_CRITICAL;
+    }
+  }
+
+  if (strlen(regexp) > 0) {
+    errcode = regexec(&preg, page, REGS, pmatch, 0);
+    if ((errcode == 0 && invert_regex == 0) ||
+        (errcode == REG_NOMATCH && invert_regex == 1)) {
+      /* OK - No-op to avoid changing the logic around it */
+      result = max_state_alt(STATE_OK, result);
+    }
+    else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
+      if (invert_regex == 0)
+        xasprintf (&msg, _("%spattern not found, "), msg);
+      else
+        xasprintf (&msg, _("%spattern found, "), msg);
+      result = STATE_CRITICAL;
+    }
+    else {
+      /* FIXME: Shouldn't that be UNKNOWN? */
+      regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
+      xasprintf (&msg, _("%sExecute Error: %s, "), msg, errbuf);
+      result = STATE_CRITICAL;
+    }
+  }
+
+  /* make sure the page is of an appropriate size */
+  /* page_len = get_content_length(header); */
+  /* FIXME: Will this work with -N ? IMHO we should use
+   * get_content_length(header) and always check if it's different than the
+   * returned pagesize
+   */
+  /* FIXME: IIRC pagesize returns headers - shouldn't we make
+   * it == get_content_length(header) ??
+   */
+  page_len = pagesize;
+  if ((max_page_len > 0) && (page_len > max_page_len)) {
+    xasprintf (&msg, _("%spage size %d too large, "), msg, page_len);
+    result = max_state_alt(STATE_WARNING, result);
+  } else if ((min_page_len > 0) && (page_len < min_page_len)) {
+    xasprintf (&msg, _("%spage size %d too small, "), msg, page_len);
+    result = max_state_alt(STATE_WARNING, result);
+  }
+
+  /* Cut-off trailing characters */
+  if(msg[strlen(msg)-2] == ',')
+    msg[strlen(msg)-2] = '\0';
+  else
+    msg[strlen(msg)-3] = '\0';
+
+  /* check elapsed time */
+  if (show_extended_perfdata)
+    xasprintf (&msg,
+           _("%s - %d bytes in %.3f second response time %s|%s %s %s %s %s %s %s"),
+           msg, page_len, elapsed_time,
+           (display_html ? "</A>" : ""),
+           perfd_time (elapsed_time),
+           perfd_size (page_len),
+           perfd_time_connect (elapsed_time_connect),
+           use_ssl == true ? perfd_time_ssl (elapsed_time_ssl) : "",
+           perfd_time_headers (elapsed_time_headers),
+           perfd_time_firstbyte (elapsed_time_firstbyte),
+           perfd_time_transfer (elapsed_time_transfer));
+  else
+    xasprintf (&msg,
+           _("%s - %d bytes in %.3f second response time %s|%s %s"),
+           msg, page_len, elapsed_time,
+           (display_html ? "</A>" : ""),
+           perfd_time (elapsed_time),
+           perfd_size (page_len));
+
+  if (show_body)
+    xasprintf (&msg, _("%s\n%s"), msg, page);
+
+  result = max_state_alt(get_status(elapsed_time, thlds), result);
+
+  die (result, "HTTP %s: %s\n", state_text(result), msg);
+  /* die failed? */
+  return STATE_UNKNOWN;
+}
+
+/* Receivces a pointer to the beginning of the body of a HTTP message
+ * which is chunked and returns a pointer to a freshly allocated memory
+ * region containing the unchunked body or NULL if something failed.
+ * The result must be freed by the caller.
+ */
+char *unchunk_content(const char *content) {
+  // https://en.wikipedia.org/wiki/Chunked_transfer_encoding
+  // https://www.rfc-editor.org/rfc/rfc7230#section-4.1
+  char *result = NULL;
+  char *start_of_chunk;
+  char* end_of_chunk;
+  long size_of_chunk;
+  const char *pointer = content;
+  char *endptr;
+  long length_of_chunk = 0;
+  size_t overall_size = 0;
+
+  while (true) {
+    size_of_chunk = strtol(pointer, &endptr, 16);
+    if (size_of_chunk == LONG_MIN || size_of_chunk == LONG_MAX) {
+      // Apparently underflow or overflow, should not happen
+      if (verbose) {
+        printf("Got an underflow or overflow from strtol at: %u\n", __LINE__);
+      }
+      return NULL;
+    }
+    if (endptr == pointer) {
+      // Apparently this was not a number
+      if (verbose) {
+        printf("Chunked content did not start with a number at all (Line: %u)\n", __LINE__);
+      }
+      return NULL;
+    }
+
+    // So, we got the length of the chunk
+    if (*endptr == ';') {
+      // Chunk extension starts here
+      while (*endptr != '\r') {
+        endptr++;
+      }
+    }
+
+    start_of_chunk = endptr + 2;
+    end_of_chunk = start_of_chunk + size_of_chunk;
+    length_of_chunk = (long)(end_of_chunk - start_of_chunk);
+    pointer = end_of_chunk + 2; //Next number should be here
+
+    if (length_of_chunk == 0) {
+      // Chunk length is 0, so this is the last one
+      break;
+    }
+
+    overall_size += length_of_chunk;
+
+    if (result == NULL) {
+      // Size of the chunk plus the ending NULL byte
+      result = (char *)malloc(length_of_chunk +1);
+      if (result == NULL) {
+        if (verbose) {
+          printf("Failed to allocate memory for unchunked body\n");
+        }
+        return NULL;
+      }
+    } else {
+      // Enlarge memory to the new size plus the ending NULL byte
+      void *tmp = realloc(result, overall_size +1);
+      if (tmp == NULL) {
+        if (verbose) {
+          printf("Failed to allocate memory for unchunked body\n");
+        }
+        return NULL;
+      } else {
+        result = tmp;
+      }
+    }
+
+    memcpy(result + (overall_size - size_of_chunk), start_of_chunk, size_of_chunk);
+  }
+
+  if (overall_size == 0 && result == NULL) {
+    // We might just have received the end chunk without previous content, so result is never allocated
+    result = calloc(1, sizeof(char));
+    // No error handling here, we can only return NULL anyway
+  } else {
+    result[overall_size] = '\0';
+  }
+  return result;
+}
+
+/* per RFC 2396 */
+#define URI_HTTP "%5[HTPShtps]"
+#define URI_HOST "%255[-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
+#define URI_PORT "%6d" /* MAX_PORT's width is 5 chars, 6 to detect overflow */
+#define URI_PATH "%[-_.!~*'();/?:@&=+$,%#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
+#define HD1 URI_HTTP "://" URI_HOST ":" URI_PORT "/" URI_PATH
+#define HD2 URI_HTTP "://" URI_HOST "/" URI_PATH
+#define HD3 URI_HTTP "://" URI_HOST ":" URI_PORT
+#define HD4 URI_HTTP "://" URI_HOST
+/* relative reference redirect like //www.site.org/test https://tools.ietf.org/html/rfc3986 */
+#define HD5 "//" URI_HOST "/" URI_PATH
+#define HD6 URI_PATH
+
+void
+redir (char *pos, char *status_line)
+{
+  int i = 0;
+  char *x;
+  char xx[2];
+  char type[6];
+  char *addr;
+  char *url;
+
+  addr = malloc (MAX_IPV4_HOSTLENGTH + 1);
+  if (addr == NULL)
+    die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate addr\n"));
+
+  memset(addr, 0, MAX_IPV4_HOSTLENGTH);
+  url = malloc (strcspn (pos, "\r\n"));
+  if (url == NULL)
+    die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate URL\n"));
+
+  while (pos) {
+    sscanf (pos, "%1[Ll]%*1[Oo]%*1[Cc]%*1[Aa]%*1[Tt]%*1[Ii]%*1[Oo]%*1[Nn]:%n", xx, &i);
+    if (i == 0) {
+      pos += (size_t) strcspn (pos, "\r\n");
+      pos += (size_t) strspn (pos, "\r\n");
+      if (strlen(pos) == 0)
+        die (STATE_UNKNOWN,
+             _("HTTP UNKNOWN - Could not find redirect location - %s%s\n"),
+             status_line, (display_html ? "</A>" : ""));
+      continue;
+    }
+
+    pos += i;
+    pos += strspn (pos, " \t");
+
+    /*
+     * RFC 2616 (4.2):  ``Header fields can be extended over multiple lines by
+     * preceding each extra line with at least one SP or HT.''
+     */
+    for (; (i = strspn (pos, "\r\n")); pos += i) {
+      pos += i;
+      if (!(i = strspn (pos, " \t"))) {
+        die (STATE_UNKNOWN, _("HTTP UNKNOWN - Empty redirect location%s\n"),
+             display_html ? "</A>" : "");
+      }
+    }
+
+    url = realloc (url, strcspn (pos, "\r\n") + 1);
+    if (url == NULL)
+      die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate URL\n"));
+
+    /* URI_HTTP, URI_HOST, URI_PORT, URI_PATH */
+    if (sscanf (pos, HD1, type, addr, &i, url) == 4) {
+      url = prepend_slash (url);
+      use_ssl = server_type_check (type);
+    }
+
+    /* URI_HTTP URI_HOST URI_PATH */
+    else if (sscanf (pos, HD2, type, addr, url) == 3 ) {
+      url = prepend_slash (url);
+      use_ssl = server_type_check (type);
+      i = server_port_check (use_ssl);
+    }
+
+    /* URI_HTTP URI_HOST URI_PORT */
+    else if (sscanf (pos, HD3, type, addr, &i) == 3) {
+      strcpy (url, HTTP_URL);
+      use_ssl = server_type_check (type);
+    }
+
+    /* URI_HTTP URI_HOST */
+    else if (sscanf (pos, HD4, type, addr) == 2) {
+      strcpy (url, HTTP_URL);
+      use_ssl = server_type_check (type);
+      i = server_port_check (use_ssl);
+    }
+    /* URI_HTTP, URI_HOST, URI_PATH */
+    else if (sscanf (pos, HD5, addr, url) == 2) {
+      if(use_ssl){
+        strcpy (type,"https");
+      }
+      else{
+         strcpy (type, server_type);
+      }
+      xasprintf (&url, "/%s", url);
+      use_ssl = server_type_check (type);
+      i = server_port_check (use_ssl);
+    }
+
+    /* URI_PATH */
+    else if (sscanf (pos, HD6, url) == 1) {
+      /* relative url */
+      if ((url[0] != '/')) {
+        if ((x = strrchr(server_url, '/')))
+          *x = '\0';
+        xasprintf (&url, "%s/%s", server_url, url);
+      }
+      i = server_port;
+      strcpy (type, server_type);
+      strcpy (addr, host_name ? host_name : server_address);
+    }
+
+    else {
+      die (STATE_UNKNOWN,
+           _("HTTP UNKNOWN - Could not parse redirect location - %s%s\n"),
+           pos, (display_html ? "</A>" : ""));
+    }
+
+    break;
+
+  } /* end while (pos) */
+
+  if (++redir_depth > max_depth)
+    die (STATE_WARNING,
+         _("HTTP WARNING - maximum redirection depth %d exceeded - %s://%s:%d%s%s\n"),
+         max_depth, type, addr, i, url, (display_html ? "</A>" : ""));
+
+  if (server_port==i &&
+      !strncmp(server_address, addr, MAX_IPV4_HOSTLENGTH) &&
+      (host_name && !strncmp(host_name, addr, MAX_IPV4_HOSTLENGTH)) &&
+      !strcmp(server_url, url))
+    die (STATE_CRITICAL,
+         _("HTTP CRITICAL - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
+         type, addr, i, url, (display_html ? "</A>" : ""));
+
+  strcpy (server_type, type);
+
+  free (host_name);
+  host_name = strndup (addr, MAX_IPV4_HOSTLENGTH);
+
+  if (!(followsticky & STICKY_HOST)) {
+    free (server_address);
+    server_address = strndup (addr, MAX_IPV4_HOSTLENGTH);
+  }
+  if (!(followsticky & STICKY_PORT)) {
+    server_port = i;
+  }
+
+  free (server_url);
+  server_url = url;
+
+  if (server_port > MAX_PORT)
+    die (STATE_UNKNOWN,
+         _("HTTP UNKNOWN - Redirection to port above %d - %s://%s:%d%s%s\n"),
+         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);
+
+  free(addr);
+  check_http ();
+}
+
+
+bool
+server_type_check (const char *type)
+{
+  if (strcmp (type, "https"))
+    return false;
+  else
+    return true;
+}
+
+int
+server_port_check (int ssl_flag)
+{
+  if (ssl_flag)
+    return HTTPS_PORT;
+  else
+    return HTTP_PORT;
+}
+
+char *perfd_time (double elapsed_time)
+{
+  return fperfdata ("time", elapsed_time, "s",
+            thlds->warning?true:false, thlds->warning?thlds->warning->end:0,
+            thlds->critical?true:false, thlds->critical?thlds->critical->end:0,
+                   true, 0, true, socket_timeout);
+}
+
+char *perfd_time_connect (double elapsed_time_connect)
+{
+  return fperfdata ("time_connect", elapsed_time_connect, "s", false, 0, false, 0, false, 0, true, socket_timeout);
+}
+
+char *perfd_time_ssl (double elapsed_time_ssl)
+{
+  return fperfdata ("time_ssl", elapsed_time_ssl, "s", false, 0, false, 0, false, 0, true, socket_timeout);
+}
+
+char *perfd_time_headers (double elapsed_time_headers)
+{
+  return fperfdata ("time_headers", elapsed_time_headers, "s", false, 0, false, 0, false, 0, true, socket_timeout);
+}
+
+char *perfd_time_firstbyte (double elapsed_time_firstbyte)
+{
+  return fperfdata ("time_firstbyte", elapsed_time_firstbyte, "s", false, 0, false, 0, false, 0, true, socket_timeout);
+}
+
+char *perfd_time_transfer (double elapsed_time_transfer)
+{
+  return fperfdata ("time_transfer", elapsed_time_transfer, "s", false, 0, false, 0, false, 0, true, socket_timeout);
+}
+
+char *perfd_size (int page_len)
+{
+  return perfdata ("size", page_len, "B",
+            (min_page_len>0?true:false), min_page_len,
+            (min_page_len>0?true:false), 0,
+            true, 0, false, 0);
+}
+
+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 tests the HTTP service on the specified host. It can test"));
+  printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
+  printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
+  printf ("%s\n", _("certificate expiration times."));
+
+  printf ("\n\n");
+
+  print_usage ();
+
+#ifdef HAVE_SSL
+  printf (_("In the first form, make an HTTP request."));
+  printf (_("In the second form, connect to the server and check the TLS certificate."));
+#endif
+  printf (_("NOTE: One or both of -H and -I must be specified"));
+
+  printf ("\n");
+
+  printf (UT_HELP_VRSN);
+  printf (UT_EXTRA_OPTS);
+
+  printf (" %s\n", "-H, --hostname=ADDRESS");
+  printf ("    %s\n", _("Host name argument for servers using host headers (virtual host)"));
+  printf ("    %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
+  printf (" %s\n", "-I, --IP-address=ADDRESS");
+  printf ("    %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
+  printf (" %s\n", "-p, --port=INTEGER");
+  printf ("    %s", _("Port number (default: "));
+  printf ("%d)\n", HTTP_PORT);
+
+  printf (UT_IPv46);
+
+#ifdef HAVE_SSL
+  printf (" %s\n", "-S, --ssl=VERSION[+]");
+  printf ("    %s\n", _("Connect via SSL. Port defaults to 443. VERSION is optional, and prevents"));
+  printf ("    %s\n", _("auto-negotiation (2 = SSLv2, 3 = SSLv3, 1 = TLSv1, 1.1 = TLSv1.1,"));
+  printf ("    %s\n", _("1.2 = TLSv1.2). With a '+' suffix, newer versions are also accepted."));
+  printf (" %s\n", "--sni");
+  printf ("    %s\n", _("Enable SSL/TLS hostname extension support (SNI)"));
+  printf (" %s\n", "-C, --certificate=INTEGER[,INTEGER]");
+  printf ("    %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
+  printf ("    %s\n", _("(when this option is used the URL is not checked by default. You can use"));
+  printf ("    %s\n", _(" --continue-after-certificate to override this behavior)"));
+  printf (" %s\n", "--continue-after-certificate");
+  printf ("    %s\n", _("Allows the HTTP check to continue after performing the certificate check."));
+  printf ("    %s\n", _("Does nothing unless -C is used."));
+  printf (" %s\n", "-J, --client-cert=FILE");
+  printf ("   %s\n", _("Name of file that contains the client certificate (PEM format)"));
+  printf ("   %s\n", _("to be used in establishing the SSL session"));
+  printf (" %s\n", "-K, --private-key=FILE");
+  printf ("   %s\n", _("Name of file containing the private key (PEM format)"));
+  printf ("   %s\n", _("matching the client certificate"));
+#endif
+
+  printf (" %s\n", "-e, --expect=STRING");
+  printf ("    %s\n", _("Comma-delimited list of strings, at least one of them is expected in"));
+  printf ("    %s", _("the first (status) line of the server response (default: "));
+  printf ("%s)\n", HTTP_EXPECT);
+  printf ("    %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
+  printf (" %s\n", "-d, --header-string=STRING");
+  printf ("    %s\n", _("String to expect in the response headers"));
+  printf (" %s\n", "-s, --string=STRING");
+  printf ("    %s\n", _("String to expect in the content"));
+  printf (" %s\n", "-u, --url=PATH");
+  printf ("    %s\n", _("URL to GET or POST (default: /)"));
+  printf (" %s\n", "-P, --post=STRING");
+  printf ("    %s\n", _("URL encoded http POST data"));
+  printf (" %s\n", "-j, --method=STRING  (for example: HEAD, OPTIONS, TRACE, PUT, DELETE, CONNECT, CONNECT:POST)");
+  printf ("    %s\n", _("Set HTTP method."));
+  printf (" %s\n", "-N, --no-body");
+  printf ("    %s\n", _("Don't wait for document body: stop reading after headers."));
+  printf ("    %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
+  printf (" %s\n", "-M, --max-age=SECONDS");
+  printf ("    %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
+  printf ("    %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
+  printf (" %s\n", "-T, --content-type=STRING");
+  printf ("    %s\n", _("specify Content-Type header media type when POSTing\n"));
+
+  printf (" %s\n", "-l, --linespan");
+  printf ("    %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
+  printf (" %s\n", "-r, --regex, --ereg=STRING");
+  printf ("    %s\n", _("Search page for regex STRING"));
+  printf (" %s\n", "-R, --eregi=STRING");
+  printf ("    %s\n", _("Search page for case-insensitive regex STRING"));
+  printf (" %s\n", "--invert-regex");
+  printf ("    %s\n", _("Return CRITICAL if found, OK if not\n"));
+
+  printf (" %s\n", "-a, --authorization=AUTH_PAIR");
+  printf ("    %s\n", _("Username:password on sites with basic authentication"));
+  printf (" %s\n", "-b, --proxy-authorization=AUTH_PAIR");
+  printf ("    %s\n", _("Username:password on proxy-servers with basic authentication"));
+  printf (" %s\n", "-A, --useragent=STRING");
+  printf ("    %s\n", _("String to be sent in http header as \"User Agent\""));
+  printf (" %s\n", "-k, --header=STRING");
+  printf ("    %s\n", _("Any other tags to be sent in http header. Use multiple times for additional headers"));
+  printf (" %s\n", "-E, --extended-perfdata");
+  printf ("    %s\n", _("Print additional performance data"));
+  printf (" %s\n", "-B, --show-body");
+  printf ("    %s\n", _("Print body content below status line"));
+  printf (" %s\n", "-L, --link");
+  printf ("    %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
+  printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow|sticky|stickyport>");
+  printf ("    %s\n", _("How to handle redirected pages. sticky is like follow but stick to the"));
+  printf ("    %s\n", _("specified IP address. stickyport also ensures port stays the same."));
+  printf (" %s\n", "--max-redirs=INTEGER");
+  printf ("    %s", _("Maximal number of redirects (default: "));
+  printf ("%d)\n", DEFAULT_MAX_REDIRS);
+  printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
+  printf ("    %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
+  printf (UT_WARN_CRIT);
+
+  printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
+
+  printf (UT_VERBOSE);
+
+  printf ("\n");
+  printf ("%s\n", _("Notes:"));
+  printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
+  printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
+  printf (" %s\n", _("other errors return STATE_UNKNOWN.  Successful connects, but incorrect response"));
+  printf (" %s\n", _("messages from the host result in STATE_WARNING return values.  If you are"));
+  printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
+  printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
+
+#ifdef HAVE_SSL
+  printf ("\n");
+  printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
+  printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
+  printf (" %s\n", _("certificate is still valid for the specified number of days."));
+  printf ("\n");
+  printf (" %s\n", _("Please note that this plugin does not check if the presented server"));
+  printf (" %s\n", _("certificate matches the hostname of the server, or if the certificate"));
+  printf (" %s\n", _("has a valid chain of trust to one of the locally installed CAs."));
+  printf ("\n");
+  printf ("%s\n", _("Examples:"));
+  printf (" %s\n\n", "CHECK CONTENT: check_http -w 5 -c 10 --ssl -H www.verisign.com");
+  printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
+  printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
+  printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
+  printf (" %s\n", _("a STATE_CRITICAL will be returned."));
+  printf ("\n");
+  printf (" %s\n\n", "CHECK CERTIFICATE: check_http -H www.verisign.com -C 14");
+  printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
+  printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
+  printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
+  printf (" %s\n\n", _("the certificate is expired."));
+  printf ("\n");
+  printf (" %s\n\n", "CHECK CERTIFICATE: check_http -H www.verisign.com -C 30,14");
+  printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 30 days,"));
+  printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
+  printf (" %s\n", _("30 days, but more than 14 days, a STATE_WARNING is returned."));
+  printf (" %s\n", _("A STATE_CRITICAL will be returned when certificate expires in less than 14 days"));
+
+  printf (" %s\n\n", "CHECK SSL WEBSERVER CONTENT VIA PROXY USING HTTP 1.1 CONNECT: ");
+  printf (" %s\n", _("check_http -I 192.168.100.35 -p 80 -u https://www.verisign.com/ -S -j CONNECT -H www.verisign.com "));
+  printf (" %s\n", _("all these options are needed: -I <proxy> -p <proxy-port> -u <check-url> -S(sl) -j CONNECT -H <webserver>"));
+  printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
+  printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
+  printf (" %s\n", _("a STATE_CRITICAL will be returned. By adding a colon to the method you can set the method used"));
+  printf (" %s\n", _("inside the proxied connection: -j CONNECT:POST"));
+
+#endif
+
+  printf (UT_SUPPORT);
+
+}
+
+
+
+void
+print_usage (void)
+{
+  printf ("%s\n", _("Usage:"));
+  printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
+  printf ("       [-J <client certificate file>] [-K <private key>]\n");
+  printf ("       [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L] [-E] [-a auth]\n");
+  printf ("       [-b proxy_auth] [-f <ok|warning|critical|follow|sticky|stickyport>]\n");
+  printf ("       [-e <expect>] [-d string] [-s string] [-l] [-r <regex> | -R <case-insensitive regex>]\n");
+  printf ("       [-P string] [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>]\n");
+  printf ("       [-A string] [-k string] [-S <version>] [--sni]\n");
+  printf ("       [-T <content-type>] [-j method]\n");
+  printf (" %s -H <vhost> | -I <IP-address> -C <warn_age>[,<crit_age>]\n",progname);
+  printf ("       [-p <port>] [-t <timeout>] [-4|-6] [--sni]\n");
+}