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diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c
index 4e5d3c81c80ce9ad501403d3bdc4ee151d9dc157..7562c4c67550fcd8794ac9cffb5fef624bf2345b 100644 (file)
--- a/plugins/check_smtp.c
+++ b/plugins/check_smtp.c
/******************************************************************************
*
-* CHECK_SMTP.C
-*
-* Program: SMTP plugin for Nagios
-* License: GPL
-* Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
-*
-* $Id$
-*
-* Description:
-*
-* This plugin will attempt to open an SMTP connection with the host.
-* Successul connects return STATE_OK, refusals and timeouts return
-* STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful
-* connects, but incorrect reponse messages from the host result in
-* STATE_WARNING return values.
-*
-* License Information:
-*
* 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
*
*****************************************************************************/
+const char *progname = "check_smtp";
+const char *revision = "$Revision$";
+const char *copyright = "1999-2003";
+const char *authors = "Nagios Plugin Development Team";
+const char *email = "nagiosplug-devel@lists.sourceforge.net";
+
+const char *summary = "\
+This plugin will attempt to open an SMTP connection with the host.\n";
+
+const char *description = "\
+Successul connects return STATE_OK, refusals and timeouts return\n\
+STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful\n\
+connects, but incorrect reponse messages from the host result in\n\
+STATE_WARNING return values.\n";
+
+const char *option_summary = "\
+-H host [-p port] [-e expect] [-C command] [-f from addr]\n\
+ [-w warn] [-c crit] [-t timeout] [-n] [-v] [-4|-6]";
+
+const char *options = "\
+ -H, --hostname=STRING or IPADDRESS\n\
+ Check server on the indicated host\n\
+ -4, --use-ipv4\n\
+ Use IPv4 protocol\n\
+ -6, --use-ipv6\n\
+ Use IPv6 protocol\n\
+ -p, --port=INTEGER\n\
+ Make connection on the indicated port (default: %d)\n\
+ -e, --expect=STRING\n\
+ String to expect in first line of server response (default: '%s')\n\
+ -n, nocommand\n\
+ Suppress SMTP command\n\
+ -C, --command=STRING\n\
+ SMTP command (default: '%s')\n\
+ -f, --from=STRING\n\
+ FROM-address to include in MAIL command, required by Exchange 2000\n\
+ (default: '%s')\n\
+ -w, --warning=INTEGER\n\
+ Seconds necessary to result in a warning status\n\
+ -c, --critical=INTEGER\n\
+ Seconds necessary to result in a critical status\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";
+
+enum {
+ SMTP_PORT = 25
+};
+const char *SMTP_EXPECT = "220";
+const char *SMTP_HELO = "HELO ";
+const char *SMTP_QUIT = "QUIT\r\n";
+
#include "config.h"
#include "common.h"
#include "netutils.h"
#include "utils.h"
-#define PROGNAME "check_smtp"
-
-#define SMTP_PORT 25
-#define SMTP_EXPECT "220"
-#define SMTP_HELO "HELO "
-
-/* sendmail will syslog a "NOQUEUE" error if session does not attempt
- * to do something useful. This can be prevented by giving a command
- * even if syntax is illegal (MAIL requires a FROM:<...> argument)
- * You can disable sending DUMMYCMD by undefining SMTP_USE_DUMMYCMD.
- *
- * According to rfc821 you can include a null reversepath in the from command
- * - but a log message is generated on the smtp server.
- *
- * Use the -f option to provide a FROM address
- */
-
-#define SMTP_DUMMYCMD "MAIL "
-#define SMTP_USE_DUMMYCMD 1
-#define SMTP_QUIT "QUIT\r\n"
-
int process_arguments (int, char **);
-int call_getopt (int, char **);
int validate_arguments (void);
-int check_disk (int usp, int free_disk);
void print_help (void);
void print_usage (void);
int server_port = SMTP_PORT;
char *server_address = NULL;
char *server_expect = NULL;
+int smtp_use_dummycmd = 1;
+char *mail_command = "MAIL ";
char *from_arg = " ";
int warning_time = 0;
int check_warning_time = FALSE;
int critical_time = 0;
int check_critical_time = FALSE;
-int verbose = FALSE;
+int verbose = 0;
int
main (int argc, char **argv)
{
int sd;
- int result;
+ double elapsed_time;
+ int result = STATE_UNKNOWN;
char buffer[MAX_INPUT_BUFFER] = "";
- char helocmd[255] = SMTP_HELO ;
- char from_str[255] = SMTP_DUMMYCMD ;
- char myhostname[248];
-
+ char *from_str = NULL;
+ char *helocmd = NULL;
+ struct timeval tv;
if (process_arguments (argc, argv) != OK)
usage ("Invalid command arguments supplied\n");
/* initialize the HELO command with the localhostname */
- gethostname(myhostname, sizeof(myhostname));
- strcat(helocmd, myhostname);
- strcat(helocmd, "\r\n");
+#ifndef HOST_MAX_BYTES
+#define HOST_MAX_BYTES 255
+#endif
+ helocmd = malloc (HOST_MAX_BYTES);
+ gethostname(helocmd, HOST_MAX_BYTES);
+ asprintf (&helocmd, "%s%s%s", SMTP_HELO, helocmd, "\r\n");
/* initialize the MAIL command with optional FROM command */
- if (from_arg) {
- strcat(from_str, "FROM: ");
- strcat(from_str, from_arg);
- }
- /* terminate line with a CRLF */
- strcat(from_str, "\r\n");
-
- if (verbose == TRUE){
- printf ("FROMCMD: %s\n", from_str);
- }
+ asprintf (&from_str, "%sFROM: %s%s", mail_command, from_arg, "\r\n");
-
+ if (verbose)
+ printf ("FROMCMD: %s\n", from_str);
/* initialize alarm signal handling */
- signal (SIGALRM, socket_timeout_alarm_handler);
+ (void) signal (SIGALRM, socket_timeout_alarm_handler);
/* set socket timeout */
- alarm (socket_timeout);
+ (void) alarm (socket_timeout);
+
+ /* start timer */
+ gettimeofday (&tv, NULL);
/* try to connect to the host at the given port number */
- time (&start_time);
result = my_tcp_connect (server_address, server_port, &sd);
/* we connected, so close connection before exiting */
if (result == STATE_OK) {
- /* watch for the SMTP connection string */
- result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
-
- /* strip the buffer of carriage returns */
- strip (buffer);
-
+ /* watch for the SMTP connection string and */
/* return a WARNING status if we couldn't read any data */
- if (result == -1) {
+ if (recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0) == -1) {
printf ("recv() failed\n");
result = STATE_WARNING;
}
-
else {
-
+ /* strip the buffer of carriage returns */
+ strip (buffer);
/* make sure we find the response we are looking for */
if (!strstr (buffer, server_expect)) {
if (server_port == SMTP_PORT)
server_port);
result = STATE_WARNING;
}
+ }
- else {
+ /* send the HELO command */
+ send(sd, helocmd, strlen(helocmd), 0);
- time (&end_time);
+ /* allow for response to helo command to reach us */
+ recv(sd, buffer, MAX_INPUT_BUFFER-1, 0);
+
+ /* sendmail will syslog a "NOQUEUE" error if session does not attempt
+ * to do something useful. This can be prevented by giving a command
+ * even if syntax is illegal (MAIL requires a FROM:<...> argument)
+ *
+ * According to rfc821 you can include a null reversepath in the from command
+ * - but a log message is generated on the smtp server.
+ *
+ * You can disable sending mail_command with '--nocommand'
+ * Use the -f option to provide a FROM address
+ */
+ if (smtp_use_dummycmd) {
- result = STATE_OK;
+ send(sd, from_str, strlen(from_str), 0);
- if (check_critical_time == TRUE
- && (end_time - start_time) > critical_time) result =
- STATE_CRITICAL;
- else if (check_warning_time == TRUE
- && (end_time - start_time) > warning_time) result =
- STATE_WARNING;
+ /* allow for response to mail_command to reach us */
+ recv(sd, buffer, MAX_INPUT_BUFFER-1, 0);
- if (verbose == TRUE)
- printf ("SMTP %s - %d sec. response time, %s\n",
- state_text (result), (int) (end_time - start_time), buffer);
- else
- printf ("SMTP %s - %d second response time\n", state_text (result),
- (int) (end_time - start_time));
- }
- }
+ if (verbose)
+ printf("DUMMYCMD: %s\n%s\n",from_str,buffer);
- /* close the connection */
- /* first send the HELO command */
- send(sd,helocmd,strlen(helocmd),0);
- /* allow for response to helo command to reach us */
- recv(sd,buffer,MAX_INPUT_BUFFER-1,0);
-
-#ifdef SMTP_USE_DUMMYCMD
- send(sd,from_str,strlen(from_str),0);
- /* allow for response to DUMMYCMD to reach us */
- recv(sd,buffer,MAX_INPUT_BUFFER-1,0);
- if (verbose == TRUE)
- printf("DUMMYCMD: %s\n%s\n",from_str,buffer);
-#endif /* SMTP_USE_DUMMYCMD */
+ } /* smtp_use_dummycmd */
- /* finally close the connection */
+ /* tell the server we're done */
send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0);
+
+ /* finally close the connection */
close (sd);
}
/* reset the alarm */
alarm (0);
+ elapsed_time = delta_time (tv);
+
+ if (check_critical_time && elapsed_time > (double) critical_time)
+ result = STATE_CRITICAL;
+ else if (check_warning_time && elapsed_time > (double) warning_time)
+ result = STATE_WARNING;
+
+ if (verbose)
+ printf ("SMTP %s - %.3f sec. response time, %s|time=%.3f\n",
+ state_text (result), elapsed_time, buffer, elapsed_time);
+ else
+ printf ("SMTP %s - %.3f second response time|time=%.3f\n",
+ state_text (result), elapsed_time, elapsed_time);
+
return result;
}
{
int c;
- if (argc < 2)
- return ERROR;
-
- for (c = 1; c < argc; c++) {
- if (strcmp ("-to", argv[c]) == 0)
- strcpy (argv[c], "-t");
- else if (strcmp ("-wt", argv[c]) == 0)
- strcpy (argv[c], "-w");
- else if (strcmp ("-ct", argv[c]) == 0)
- strcpy (argv[c], "-c");
- }
-
-
-
- c = 0;
- while ((c += (call_getopt (argc - c, &argv[c]))) < argc) {
-
- if (is_option (argv[c]))
- continue;
-
- if (server_address == NULL) {
- if (is_host (argv[c])) {
- server_address = argv[c];
- }
- else {
- usage ("Invalid host name");
- }
- }
- }
-
- if (server_address == NULL)
- server_address = strscpy (NULL, "127.0.0.1");
-
- if (server_expect == NULL)
- server_expect = strscpy (NULL, SMTP_EXPECT);
-
- return validate_arguments ();
-}
-
-
-
-
-
-
-int
-call_getopt (int argc, char **argv)
-{
- int c, i = 0;
-
-#ifdef HAVE_GETOPT_H
int option_index = 0;
static struct option long_options[] = {
{"hostname", required_argument, 0, 'H'},
{"expect", required_argument, 0, 'e'},
{"critical", required_argument, 0, 'c'},
{"warning", required_argument, 0, 'w'},
+ {"timeout", required_argument, 0, 't'},
{"port", required_argument, 0, 'p'},
{"from", required_argument, 0, 'f'},
+ {"command", required_argument, 0, 'C'},
+ {"nocommand", required_argument, 0, 'n'},
{"verbose", no_argument, 0, 'v'},
{"version", no_argument, 0, 'V'},
+ {"use-ipv4", no_argument, 0, '4'},
+ {"use-ipv6", no_argument, 0, '6'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
-#endif
- while (1) {
-#ifdef HAVE_GETOPT_H
- c =
- getopt_long (argc, argv, "+hVvt:p:f:e:c:w:H:", long_options,
- &option_index);
-#else
- c = getopt (argc, argv, "+?hVvt:p:f:e:c:w:H:");
-#endif
+ if (argc < 2)
+ return ERROR;
+
+ for (c = 1; c < argc; c++) {
+ if (strcmp ("-to", argv[c]) == 0)
+ strcpy (argv[c], "-t");
+ else if (strcmp ("-wt", argv[c]) == 0)
+ strcpy (argv[c], "-w");
+ else if (strcmp ("-ct", argv[c]) == 0)
+ strcpy (argv[c], "-c");
+ }
- i++;
+ while (1) {
+ c = getopt_long (argc, argv, "+hVv46t:p:f:e:c:w:H:C:",
+ long_options, &option_index);
- if (c == -1 || c == EOF || c == 1)
+ if (c == -1 || c == EOF)
break;
- switch (c) {
- case 't':
- case 'p':
- case 'e':
- case 'f':
- case 'c':
- case 'w':
- case 'H':
- i++;
- }
-
switch (c) {
case 'H': /* hostname */
if (is_host (optarg)) {
case 'e': /* server expect string on 220 */
server_expect = optarg;
break;
+ case 'C': /* server expect string on 220 */
+ mail_command = optarg;
+ smtp_use_dummycmd = 1;
+ break;
+ case 'n': /* server expect string on 220 */
+ smtp_use_dummycmd = 0;
+ break;
case 'c': /* critical time threshold */
if (is_intnonneg (optarg)) {
critical_time = atoi (optarg);
}
break;
case 'v': /* verbose */
- verbose = TRUE;
+ verbose++;
break;
case 't': /* timeout */
if (is_intnonneg (optarg)) {
usage ("Time interval must be a nonnegative integer\n");
}
break;
+ case '4':
+ address_family = AF_INET;
+ break;
+ case '6':
+#ifdef USE_IPV6
+ address_family = AF_INET6;
+#else
+ usage ("IPv6 support not available\n");
+#endif
+ break;
case 'V': /* version */
- print_revision (PROGNAME, "$Revision$");
+ print_revision (progname, revision);
exit (STATE_OK);
case 'h': /* help */
print_help ();
usage ("Invalid argument\n");
}
}
- return i;
+
+ c = optind;
+ if (server_address == NULL) {
+ if (argv[c]) {
+ if (is_host (argv[c]))
+ server_address = argv[c];
+ else
+ usage ("Invalid host name");
+ }
+ else {
+ asprintf (&server_address, "127.0.0.1");
+ }
+ }
+
+ if (server_expect == NULL)
+ asprintf (&server_expect, SMTP_EXPECT);
+
+ return validate_arguments ();
}
void
print_help (void)
{
- print_revision (PROGNAME, "$Revision$");
- printf
- ("Copyright (c) 2000 Ethan Galstad/Karl DeBisschop\n\n"
- "This plugin test the SMTP service on the specified host.\n\n");
+ print_revision (progname, revision);
+ printf ("Copyright (c) %s %s\n\t<%s>\n\n%s\n",
+ copyright, authors, email, summary);
print_usage ();
- printf
- ("\nOptions:\n"
- " -H, --hostname=STRING or IPADDRESS\n"
- " Check server on the indicated host\n"
- " -p, --port=INTEGER\n"
- " Make connection on the indicated port (default: %d)\n"
- " -e, --expect=STRING\n"
- " String to expect in first line of server response (default: %s)\n"
- " -f, --from=STRING\n"
- " from address to include in MAIL command (default NULL, Exchange2000 requires one)\n"
- " -w, --warning=INTEGER\n"
- " Seconds necessary to result in a warning status\n"
- " -c, --critical=INTEGER\n"
- " Seconds necessary to result in a critical status\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",
- SMTP_PORT, SMTP_EXPECT, DEFAULT_SOCKET_TIMEOUT);
+ printf ("\nOptions:\n");
+ printf (options, SMTP_PORT, SMTP_EXPECT, mail_command, from_arg,
+ DEFAULT_SOCKET_TIMEOUT);
support ();
}
void
print_usage (void)
{
- printf
- ("Usage: %s -H host [-e expect] [-p port] [-f from addr] [-w warn] [-c crit] [-t timeout] [-v]\n"
- " %s --help\n"
- " %s --version\n", PROGNAME, PROGNAME, PROGNAME);
+ printf ("Usage: %s %s\n"
+ " %s --help\n"
+ " %s --version\n",
+ progname, option_summary, progname, progname);
}