X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=plugins%2Fcheck_dig.c;h=45189b000d222ce7c4ca0a7186103bafaabaddfa;hb=25d1ee331dbe4977a4a1a756c67f32bd51d9b070;hp=f80a9dc2f145caec6c6eb265fe481e616fe6bf49;hpb=614071738f0edeedfa9731c5e3dd63e158bfbc7a;p=nagiosplug.git diff --git a/plugins/check_dig.c b/plugins/check_dig.c index f80a9dc..45189b0 100644 --- a/plugins/check_dig.c +++ b/plugins/check_dig.c @@ -1,269 +1,364 @@ /***************************************************************************** -* -* This program is free software; you can redistribute it and/or modify +* +* Nagios check_dig plugin +* +* License: GPL +* Copyright (c) 2002-2008 Nagios Plugins Development Team +* +* Description: +* +* This file contains the check_dig plugin +* +* +* This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by -* the Free Software Foundation; either version 2 of the License, or +* 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, write to the Free Software -* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -* +* along with this program. If not, see . +* +* *****************************************************************************/ +/* Hackers note: + * There are typecasts to (char *) from _("foo bar") in this file. + * They prevent compiler warnings. Never (ever), permute strings obtained + * that are typecast from (const char *) (which happens when --disable-nls) + * because on some architectures those strings are in non-writable memory */ + const char *progname = "check_dig"; -const char *revision = "$Revision$"; -const char *copyright = "2002-2003"; -const char *authors = "Nagios Plugin Development Team"; +const char *copyright = "2002-2008"; const char *email = "nagiosplug-devel@lists.sourceforge.net"; -const char *summary = "Test the DNS service on the specified host using dig\n"; - -const char *option_summary = "-H host -l lookup [-t timeout] [-v]"; - -const char *options = "\ - -H, --hostname=STRING or IPADDRESS\n\ - Check server on the indicated host\n\ - -l, --lookup=STRING\n\ - machine name to lookup\n\ - -t, --timeout=INTEGER\n\ - Seconds before connection attempt times out (default: %d)\n\ - -v, --verbose\n\ - Print extra information (command-line use only)\n\ - -h, --help\n\ - Print detailed help screen\n\ - -V, --version\n\ - Print version information\n\n"; - -#include "config.h" + #include "common.h" +#include "netutils.h" #include "utils.h" -#include "popen.h" +#include "runcmd.h" int process_arguments (int, char **); int validate_arguments (void); void print_help (void); void print_usage (void); +#define UNDEFINED 0 +#define DEFAULT_PORT 53 + char *query_address = NULL; +char *record_type = "A"; +char *expected_address = NULL; char *dns_server = NULL; +char *dig_args = ""; int verbose = FALSE; +int server_port = DEFAULT_PORT; +double warning_interval = UNDEFINED; +double critical_interval = UNDEFINED; +struct timeval tv; int main (int argc, char **argv) { - char input_buffer[MAX_INPUT_BUFFER]; - char *command_line = NULL; - char *output = ""; - int result = STATE_UNKNOWN; - - /* Set signal handling and alarm */ - if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) - usage ("Cannot catch SIGALRM\n"); - - if (process_arguments (argc, argv) != OK) - usage ("Could not parse arguments\n"); - - /* get the command to run */ - asprintf (&command_line, "%s @%s %s", PATH_TO_DIG, dns_server, query_address); - - alarm (timeout_interval); - time (&start_time); - - if (verbose) - printf ("%s\n", command_line); - /* run the command */ - child_process = spopen (command_line); - if (child_process == NULL) { - printf ("Could not open pipe: %s\n", command_line); - return STATE_UNKNOWN; - } - - child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r"); - if (child_stderr == NULL) - printf ("Could not open stderr for %s\n", command_line); - - while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) { - - /* the server is responding, we just got the host name... */ - if (strstr (input_buffer, ";; ANSWER SECTION:")) { - - /* get the host address */ - if (!fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) - break; - - if (strpbrk (input_buffer, "\r\n")) - input_buffer[strcspn (input_buffer, "\r\n")] = '\0'; - - if (strstr (input_buffer, query_address) == input_buffer) { - asprintf (&output, input_buffer); - result = STATE_OK; - } - else { - asprintf (&output, "Server not found in ANSWER SECTION"); - result = STATE_WARNING; - } - - continue; - } - - } - - if (result != STATE_OK) { - asprintf (&output, "No ANSWER SECTION found"); - } - - while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr)) { - /* If we get anything on STDERR, at least set warning */ - result = max_state (result, STATE_WARNING); - printf ("%s", input_buffer); - if (strlen (output) == 0) - asprintf (&output, 1 + index (input_buffer, ':')); - } - - (void) fclose (child_stderr); - - /* close the pipe */ - if (spclose (child_process)) { - result = max_state (result, STATE_WARNING); - if (strlen (output) == 0) - asprintf (&output, "dig returned error status"); - } - - (void) time (&end_time); - - if (output == NULL || strlen (output) == 0) - asprintf (&output, " Probably a non-existent host/domain"); - - if (result == STATE_OK) - printf ("DNS OK - %d seconds response time (%s)\n", - (int) (end_time - start_time), output); - else if (result == STATE_WARNING) - printf ("DNS WARNING - %s\n", output); - else if (result == STATE_CRITICAL) - printf ("DNS CRITICAL - %s\n", output); - else - printf ("DNS problem - %s\n", output); - - return result; + char *command_line; + output chld_out, chld_err; + char *msg = NULL; + size_t i; + char *t; + long microsec; + double elapsed_time; + int result = STATE_UNKNOWN; + + setlocale (LC_ALL, ""); + bindtextdomain (PACKAGE, LOCALEDIR); + textdomain (PACKAGE); + + /* Set signal handling and alarm */ + if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) + usage_va(_("Cannot catch SIGALRM")); + + /* Parse extra opts if any */ + argv=np_extra_opts (&argc, argv, progname); + + if (process_arguments (argc, argv) == ERROR) + usage_va(_("Could not parse arguments")); + + /* get the command to run */ + asprintf (&command_line, "%s @%s -p %d %s -t %s %s", + PATH_TO_DIG, dns_server, server_port, query_address, record_type, dig_args); + + alarm (timeout_interval); + gettimeofday (&tv, NULL); + + if (verbose) { + printf ("%s\n", command_line); + if(expected_address != NULL) { + printf (_("Looking for: '%s'\n"), expected_address); + } else { + printf (_("Looking for: '%s'\n"), query_address); + } + } + + /* run the command */ + if(np_runcmd(command_line, &chld_out, &chld_err, 0) != 0) { + result = STATE_WARNING; + msg = (char *)_("dig returned an error status"); + } + + for(i = 0; i < chld_out.lines; i++) { + /* the server is responding, we just got the host name... */ + if (strstr (chld_out.line[i], ";; ANSWER SECTION:")) { + + /* loop through the whole 'ANSWER SECTION' */ + for(; i < chld_out.lines; i++) { + /* get the host address */ + if (verbose) + printf ("%s\n", chld_out.line[i]); + + if (strstr (chld_out.line[i], (expected_address == NULL ? query_address : expected_address)) != NULL) { + msg = chld_out.line[i]; + result = STATE_OK; + + /* Translate output TAB -> SPACE */ + t = msg; + while ((t = strchr(t, '\t')) != NULL) *t = ' '; + break; + } + } + + if (result == STATE_UNKNOWN) { + msg = (char *)_("Server not found in ANSWER SECTION"); + result = STATE_WARNING; + } + + /* we found the answer section, so break out of the loop */ + break; + } + } + + if (result == STATE_UNKNOWN) { + msg = (char *)_("No ANSWER SECTION found"); + result = STATE_CRITICAL; + } + + /* If we get anything on STDERR, at least set warning */ + if(chld_err.buflen > 0) { + result = max_state(result, STATE_WARNING); + if(!msg) for(i = 0; i < chld_err.lines; i++) { + msg = strchr(chld_err.line[0], ':'); + if(msg) { + msg++; + break; + } + } + } + + microsec = deltime (tv); + elapsed_time = (double)microsec / 1.0e6; + + if (critical_interval > UNDEFINED && elapsed_time > critical_interval) + result = STATE_CRITICAL; + + else if (warning_interval > UNDEFINED && elapsed_time > warning_interval) + result = STATE_WARNING; + + printf ("DNS %s - %.3f seconds response time (%s)|%s\n", + state_text (result), elapsed_time, + msg ? msg : _("Probably a non-existent host/domain"), + fperfdata("time", elapsed_time, "s", + (warning_interval>UNDEFINED?TRUE:FALSE), + warning_interval, + (critical_interval>UNDEFINED?TRUE:FALSE), + critical_interval, + TRUE, 0, FALSE, 0)); + return result; } + + /* process command-line arguments */ int process_arguments (int argc, char **argv) { - int c; - - int option_index = 0; - static struct option long_options[] = { - {"hostname", required_argument, 0, 'H'}, - {"query_address", required_argument, 0, 'e'}, - {"verbose", no_argument, 0, 'v'}, - {"version", no_argument, 0, 'V'}, - {"help", no_argument, 0, 'h'}, - {0, 0, 0, 0} - }; - - if (argc < 2) - return ERROR; - - while (1) { - c = getopt_long (argc, argv, "hVvt:l:H:", long_options, &option_index); - - if (c == -1 || c == EOF) - break; - - switch (c) { - case '?': /* help */ - usage3 ("Unknown argument", optopt); - case 'H': /* hostname */ - if (is_host (optarg)) { - dns_server = optarg; - } - else { - usage ("Invalid host name\n"); - } - break; - case 'l': /* username */ - query_address = optarg; - break; - case 'v': /* verbose */ - verbose = TRUE; - break; - case 't': /* timeout */ - if (is_intnonneg (optarg)) { - timeout_interval = atoi (optarg); - } - else { - usage ("Time interval must be a nonnegative integer\n"); - } - break; - case 'V': /* version */ - print_revision (progname, "$Revision$"); - exit (STATE_OK); - case 'h': /* help */ - print_help (); - exit (STATE_OK); - } - } - - c = optind; - if (dns_server == NULL) { - if (c < argc) { - if (is_host (argv[c])) { - dns_server = argv[c]; - } - else { - usage ("Invalid host name"); - } - } - else { - dns_server = strdup ("127.0.0.1"); - } - } - - return validate_arguments (); + int c; + + int option = 0; + static struct option longopts[] = { + {"hostname", required_argument, 0, 'H'}, + {"query_address", required_argument, 0, 'l'}, + {"warning", required_argument, 0, 'w'}, + {"critical", required_argument, 0, 'c'}, + {"timeout", required_argument, 0, 't'}, + {"dig-arguments", required_argument, 0, 'A'}, + {"verbose", no_argument, 0, 'v'}, + {"version", no_argument, 0, 'V'}, + {"help", no_argument, 0, 'h'}, + {"record_type", required_argument, 0, 'T'}, + {"expected_address", required_argument, 0, 'a'}, + {"port", required_argument, 0, 'p'}, + {0, 0, 0, 0} + }; + + if (argc < 2) + return ERROR; + + while (1) { + c = getopt_long (argc, argv, "hVvt:l:H:w:c:T:p:a:A:", longopts, &option); + + if (c == -1 || c == EOF) + break; + + switch (c) { + case 'h': /* help */ + print_help (); + exit (STATE_OK); + case 'V': /* version */ + print_revision (progname, NP_VERSION); + exit (STATE_OK); + case 'H': /* hostname */ + host_or_die(optarg); + dns_server = optarg; + break; + case 'p': /* server port */ + if (is_intpos (optarg)) { + server_port = atoi (optarg); + } + else { + usage_va(_("Port must be a positive integer - %s"), optarg); + } + break; + case 'l': /* address to lookup */ + query_address = optarg; + break; + case 'w': /* warning */ + if (is_nonnegative (optarg)) { + warning_interval = strtod (optarg, NULL); + } + else { + usage_va(_("Warning interval must be a positive integer - %s"), optarg); + } + break; + case 'c': /* critical */ + if (is_nonnegative (optarg)) { + critical_interval = strtod (optarg, NULL); + } + else { + usage_va(_("Critical interval must be a positive integer - %s"), optarg); + } + break; + case 't': /* timeout */ + if (is_intnonneg (optarg)) { + timeout_interval = atoi (optarg); + } + else { + usage_va(_("Timeout interval must be a positive integer - %s"), optarg); + } + break; + case 'A': /* dig arguments */ + dig_args = strdup(optarg); + break; + case 'v': /* verbose */ + verbose = TRUE; + break; + case 'T': + record_type = optarg; + break; + case 'a': + expected_address = optarg; + break; + default: /* usage5 */ + usage5(); + } + } + + c = optind; + if (dns_server == NULL) { + if (c < argc) { + host_or_die(argv[c]); + dns_server = argv[c]; + } + else { + dns_server = strdup ("127.0.0.1"); + } + } + + return validate_arguments (); } - - int validate_arguments (void) { - return OK; + if (query_address != NULL) + return OK; + else + return ERROR; } - - void print_help (void) { - print_revision (progname, revision); - printf - ("Copyright (c) %s %s <%s>\n\n%s\n", - copyright, authors, email, summary); - print_usage (); - printf ("\nOptions:\n"); - printf (options, DEFAULT_SOCKET_TIMEOUT); - support (); -} + char *myport; + + asprintf (&myport, "%d", DEFAULT_PORT); + print_revision (progname, NP_VERSION); + printf ("Copyright (c) 2000 Karl DeBisschop \n"); + printf (COPYRIGHT, copyright, email); + + printf (_("This plugin test the DNS service on the specified host using dig")); + + printf ("\n\n"); + + print_usage (); + + printf (UT_HELP_VRSN); + + printf (UT_EXTRA_OPTS); + + printf (UT_HOST_PORT, 'p', myport); + + printf (" %s\n","-l, --query_address=STRING"); + printf (" %s\n",_("Machine name to lookup")); + printf (" %s\n","-T, --record_type=STRING"); + printf (" %s\n",_("Record type to lookup (default: A)")); + printf (" %s\n","-a, --expected_address=STRING"); + printf (" %s\n",_("An address expected to be in the answer section. If not set, uses whatever")); + printf (" %s\n",_("was in -l")); + printf (" %s\n","-A, --dig-arguments=STRING"); + printf (" %s\n",_("Pass STRING as argument(s) to dig")); + printf (UT_WARN_CRIT); + printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT); + printf (UT_VERBOSE); + + printf ("\n"); + printf ("%s\n", _("Examples:")); + printf (" %s\n", "check_dig -H DNSSERVER -l www.example.com -A \"+tcp\""); + printf (" %s\n", "This will send a tcp query to DNSSERVER for www.example.com"); + +#ifdef NP_EXTRA_OPTS + printf ("\n"); + printf ("%s\n", _("Notes:")); + printf (UT_EXTRA_OPTS_NOTES); +#endif + + printf (UT_SUPPORT); +} void print_usage (void) { - printf ("Usage: %s %s\n", progname, option_summary); - printf (" %s (-h|--help)\n", progname); - printf (" %s (-V|--version)\n", progname); + printf (_("Usage:")); + printf ("%s -l [-H ] [-p ]\n", progname); + printf (" [-T ] [-w ] [-c ]\n"); + printf (" [-t ] [-a ] [-v]\n"); }