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diff --git a/plugins/check_http.c b/plugins/check_http.c
index db94932..4dcf1a5 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -463,9 +463,11 @@ check_http (void)
463{ 463{
464 char *msg; 464 char *msg;
465 char *status_line; 465 char *status_line;
466 char *status_code;
466 char *header; 467 char *header;
467 char *page; 468 char *page;
468 char *auth; 469 char *auth;
470 int http_status;
469 int i = 0; 471 int i = 0;
470 size_t pagesize = 0; 472 size_t pagesize = 0;
471 char *full_page; 473 char *full_page;
@@ -614,51 +616,49 @@ check_http (void)
614 /* make sure the status line matches the response we are looking for */ 616 /* make sure the status line matches the response we are looking for */
615 if (!strstr (status_line, server_expect)) { 617 if (!strstr (status_line, server_expect)) {
616 if (server_port == HTTP_PORT) 618 if (server_port == HTTP_PORT)
617 asprintf (&msg, _("Invalid HTTP response received from host\n")); 619 asprintf (&msg,
620 _("Invalid HTTP response received from host\n"));
618 else 621 else
619 asprintf (&msg, 622 asprintf (&msg,
620 _("Invalid HTTP response received from host on port %d\n"), 623 _("Invalid HTTP response received from host on port %d\n"),
621 server_port); 624 server_port);
622 die (STATE_CRITICAL, "%s", msg); 625 die (STATE_CRITICAL, "%s", msg);
623 } 626 }
624 627
625 /* Exit here if server_expect was set by user and not default */ 628 /* Exit here if server_expect was set by user and not default */
626 if ( server_expect_yn ) { 629 if ( server_expect_yn ) {
627 asprintf (&msg, _("HTTP OK: Status line output matched \"%s\"\n"), 630 asprintf (&msg,
628 server_expect); 631 _("HTTP OK: Status line output matched \"%s\"\n"),
632 server_expect);
629 if (verbose) 633 if (verbose)
630 printf ("%s\n",msg); 634 printf ("%s\n",msg);
631
632 } 635 }
633 else { 636 else {
634 637 /* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
638 /* HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
639 /* Status-Code = 3 DIGITS */
640
641 status_code = strchr (status_line, ' ') + sizeof (char);
642 if (strspn (status_code, "1234567890") != 3)
643 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);
644
645 http_status = atoi (status_code);
635 646
636 /* check the return code */ 647 /* check the return code */
648
649 if (http_status >= 600 || http_status < 100)
650 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);
651
637 /* server errors result in a critical state */ 652 /* server errors result in a critical state */
638 if (strstr (status_line, "500") || strstr (status_line, "501") || 653 else if (http_status >= 500)
639 strstr (status_line, "502") || strstr (status_line, "503") ||
640 strstr (status_line, "504") || strstr (status_line, "505")) {
641 die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line); 654 die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line);
642 }
643 655
644 /* client errors result in a warning state */ 656 /* client errors result in a warning state */
645 if (strstr (status_line, "400") || strstr (status_line, "401") || 657 else if (http_status >= 400)
646 strstr (status_line, "402") || strstr (status_line, "403") ||
647 strstr (status_line, "404") || strstr (status_line, "405") ||
648 strstr (status_line, "406") || strstr (status_line, "407") ||
649 strstr (status_line, "408") || strstr (status_line, "409") ||
650 strstr (status_line, "410") || strstr (status_line, "411") ||
651 strstr (status_line, "412") || strstr (status_line, "413") ||
652 strstr (status_line, "414") || strstr (status_line, "415") ||
653 strstr (status_line, "416") || strstr (status_line, "417")) {
654 die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line); 658 die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line);
655 }
656 659
657 /* check redirected page if specified */ 660 /* check redirected page if specified */
658 if (strstr (status_line, "300") || strstr (status_line, "301") || 661 else if (http_status >= 300) {
659 strstr (status_line, "302") || strstr (status_line, "303") ||
660 strstr (status_line, "304") || strstr (status_line, "305") ||
661 strstr (status_line, "306")) {
662 662
663 if (onredirect == STATE_DEPENDENT) 663 if (onredirect == STATE_DEPENDENT)
664 redir (header, status_line); 664 redir (header, status_line);
@@ -677,11 +677,9 @@ check_http (void)
677 status_line, elapsed_time, timestamp, 677 status_line, elapsed_time, timestamp,
678 (display_html ? "</A>" : ""), 678 (display_html ? "</A>" : ""),
679 perfd_time (microsec), perfd_size (pagesize)); 679 perfd_time (microsec), perfd_size (pagesize));
680 } /* end if (strstr (status_line, "30[0-4]") */ 680 } /* end if (http_status >= 300) */
681
682 681
683 } /* end else (server_expect_yn) */ 682 } /* end else (server_expect_yn) */
684
685 683
686 /* check elapsed time */ 684 /* check elapsed time */
687 microsec = deltime (tv); 685 microsec = deltime (tv);