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monitoring-plugins/plugins/check_smtp.c
Iustin Pop 8520c643dd Simply initializes n before it is used 
When SSL is enabled, n is assigned the size of the server's second EHLO
response (I think in bytes), which will usually be significantly higher
than the command passed. As such, no commands are executed and no responses
are checked, which - silently - defeats the desired checks and results in a
success value.
2019-01-18 22:52:54 +01:00

855 lines
23 KiB
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/*****************************************************************************
*
* Monitoring check_smtp plugin
*
* License: GPL
* Copyright (c) 2000-2007 Monitoring Plugins Development Team
*
* Description:
*
* This file contains the check_smtp plugin
*
* This plugin will attempt to open an SMTP connection with the host.
*
*
* 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_smtp";
const char *copyright = "2000-2007";
const char *email = "devel@monitoring-plugins.org";
#include "common.h"
#include "netutils.h"
#include "utils.h"
#include "base64.h"
#include <ctype.h>
#ifdef HAVE_SSL
int check_cert = FALSE;
int days_till_exp_warn, days_till_exp_crit;
# define my_recv(buf, len) ((use_ssl && ssl_established) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
# define my_send(buf, len) ((use_ssl && ssl_established) ? 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
enum {
SMTP_PORT = 25
};
#define SMTP_EXPECT "220"
#define SMTP_HELO "HELO "
#define SMTP_EHLO "EHLO "
#define SMTP_QUIT "QUIT\r\n"
#define SMTP_STARTTLS "STARTTLS\r\n"
#define SMTP_AUTH_LOGIN "AUTH LOGIN\r\n"
#define EHLO_SUPPORTS_STARTTLS 1
int process_arguments (int, char **);
int validate_arguments (void);
void print_help (void);
void print_usage (void);
void smtp_quit(void);
int recvline(char *, size_t);
int recvlines(char *, size_t);
int my_close(void);
#include "regex.h"
char regex_expect[MAX_INPUT_BUFFER] = "";
regex_t preg;
regmatch_t pmatch[10];
char timestamp[20] = "";
char errbuf[MAX_INPUT_BUFFER];
int cflags = REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
int eflags = 0;
int errcode, excode;
int server_port = SMTP_PORT;
char *server_address = NULL;
char *server_expect = NULL;
char *mail_command = NULL;
char *from_arg = NULL;
int send_mail_from=0;
int ncommands=0;
int command_size=0;
int nresponses=0;
int response_size=0;
char **commands = NULL;
char **responses = NULL;
char *authtype = NULL;
char *authuser = NULL;
char *authpass = NULL;
double warning_time = 0;
int check_warning_time = FALSE;
double critical_time = 0;
int check_critical_time = FALSE;
int verbose = 0;
int use_ssl = FALSE;
short use_ehlo = FALSE;
short ssl_established = 0;
char *localhostname = NULL;
int sd;
char buffer[MAX_INPUT_BUFFER];
enum {
TCP_PROTOCOL = 1,
UDP_PROTOCOL = 2,
};
int ignore_send_quit_failure = FALSE;
int
main (int argc, char **argv)
{
short supports_tls=FALSE;
int n = 0;
double elapsed_time;
long microsec;
int result = STATE_UNKNOWN;
char *cmd_str = NULL;
char *helocmd = NULL;
char *error_msg = "";
char *server_response = NULL;
struct timeval tv;
/* Catch pipe errors in read/write - sometimes occurs when writing QUIT */
(void) signal (SIGPIPE, SIG_IGN);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
/* If localhostname not set on command line, use gethostname to set */
if(! localhostname){
localhostname = malloc (HOST_MAX_BYTES);
if(!localhostname){
printf(_("malloc() failed!\n"));
return STATE_CRITICAL;
}
if(gethostname(localhostname, HOST_MAX_BYTES)){
printf(_("gethostname() failed!\n"));
return STATE_CRITICAL;
}
}
if(use_ehlo)
xasprintf (&helocmd, "%s%s%s", SMTP_EHLO, localhostname, "\r\n");
else
xasprintf (&helocmd, "%s%s%s", SMTP_HELO, localhostname, "\r\n");
if (verbose)
printf("HELOCMD: %s", helocmd);
/* initialize the MAIL command with optional FROM command */
xasprintf (&cmd_str, "%sFROM:<%s>%s", mail_command, from_arg, "\r\n");
if (verbose && send_mail_from)
printf ("FROM CMD: %s", cmd_str);
/* initialize alarm signal handling */
(void) signal (SIGALRM, socket_timeout_alarm_handler);
/* set socket timeout */
(void) alarm (socket_timeout);
/* start timer */
gettimeofday (&tv, NULL);
/* try to connect to the host at the given port number */
result = my_tcp_connect (server_address, server_port, &sd);
if (result == STATE_OK) { /* we connected */
/* watch for the SMTP connection string and */
/* return a WARNING status if we couldn't read any data */
if (recvlines(buffer, MAX_INPUT_BUFFER) <= 0) {
printf (_("recv() failed\n"));
return STATE_WARNING;
}
/* save connect return (220 hostname ..) for later use */
xasprintf(&server_response, "%s", buffer);
/* send the HELO/EHLO command */
send(sd, helocmd, strlen(helocmd), 0);
/* allow for response to helo command to reach us */
if (recvlines(buffer, MAX_INPUT_BUFFER) <= 0) {
printf (_("recv() failed\n"));
return STATE_WARNING;
} else if(use_ehlo){
if(strstr(buffer, "250 STARTTLS") != NULL ||
strstr(buffer, "250-STARTTLS") != NULL){
supports_tls=TRUE;
}
}
if(use_ssl && ! supports_tls){
printf(_("WARNING - TLS not supported by server\n"));
smtp_quit();
return STATE_WARNING;
}
#ifdef HAVE_SSL
if(use_ssl) {
/* send the STARTTLS command */
send(sd, SMTP_STARTTLS, strlen(SMTP_STARTTLS), 0);
recvlines(buffer, MAX_INPUT_BUFFER); /* wait for it */
if (!strstr (buffer, SMTP_EXPECT)) {
printf (_("Server does not support STARTTLS\n"));
smtp_quit();
return STATE_UNKNOWN;
}
result = np_net_ssl_init(sd);
if(result != STATE_OK) {
printf (_("CRITICAL - Cannot create SSL context.\n"));
close(sd);
np_net_ssl_cleanup();
return STATE_CRITICAL;
} else {
ssl_established = 1;
}
/*
* Resend the EHLO command.
*
* RFC 3207 (4.2) says: ``The client MUST discard any knowledge
* obtained from the server, such as the list of SMTP service
* extensions, which was not obtained from the TLS negotiation
* itself. The client SHOULD send an EHLO command as the first
* command after a successful TLS negotiation.'' For this
* reason, some MTAs will not allow an AUTH LOGIN command before
* we resent EHLO via TLS.
*/
if (my_send(helocmd, strlen(helocmd)) <= 0) {
printf("%s\n", _("SMTP UNKNOWN - Cannot send EHLO command via TLS."));
my_close();
return STATE_UNKNOWN;
}
if (verbose)
printf(_("sent %s"), helocmd);
if ((n = recvlines(buffer, MAX_INPUT_BUFFER)) <= 0) {
printf("%s\n", _("SMTP UNKNOWN - Cannot read EHLO response via TLS."));
my_close();
return STATE_UNKNOWN;
}
if (verbose) {
printf("%s", buffer);
}
# ifdef USE_OPENSSL
if ( check_cert ) {
result = np_net_ssl_check_cert(days_till_exp_warn, days_till_exp_crit);
smtp_quit();
my_close();
return result;
}
# endif /* USE_OPENSSL */
}
#endif
if (verbose)
printf ("%s", buffer);
/* save buffer for later use */
xasprintf(&server_response, "%s%s", server_response, buffer);
/* strip the buffer of carriage returns */
strip (server_response);
/* make sure we find the droids we are looking for */
if (!strstr (server_response, server_expect)) {
if (server_port == SMTP_PORT)
printf (_("Invalid SMTP response received from host: %s\n"), server_response);
else
printf (_("Invalid SMTP response received from host on port %d: %s\n"),
server_port, server_response);
return STATE_WARNING;
}
if (send_mail_from) {
my_send(cmd_str, strlen(cmd_str));
if (recvlines(buffer, MAX_INPUT_BUFFER) >= 1 && verbose)
printf("%s", buffer);
}
n = 0;
while (n < ncommands) {
xasprintf (&cmd_str, "%s%s", commands[n], "\r\n");
my_send(cmd_str, strlen(cmd_str));
if (recvlines(buffer, MAX_INPUT_BUFFER) >= 1 && verbose)
printf("%s", buffer);
strip (buffer);
if (n < nresponses) {
cflags |= REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
errcode = regcomp (&preg, responses[n], cflags);
if (errcode != 0) {
regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
printf (_("Could Not Compile Regular Expression"));
return ERROR;
}
excode = regexec (&preg, buffer, 10, pmatch, eflags);
if (excode == 0) {
result = STATE_OK;
}
else if (excode == REG_NOMATCH) {
result = STATE_WARNING;
printf (_("SMTP %s - Invalid response '%s' to command '%s'\n"), state_text (result), buffer, commands[n]);
}
else {
regerror (excode, &preg, errbuf, MAX_INPUT_BUFFER);
printf (_("Execute Error: %s\n"), errbuf);
result = STATE_UNKNOWN;
}
}
n++;
}
if (authtype != NULL) {
if (strcmp (authtype, "LOGIN") == 0) {
char *abuf;
int ret;
do {
if (authuser == NULL) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("no authuser specified, "));
break;
}
if (authpass == NULL) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("no authpass specified, "));
break;
}
/* send AUTH LOGIN */
my_send(SMTP_AUTH_LOGIN, strlen(SMTP_AUTH_LOGIN));
if (verbose)
printf (_("sent %s\n"), "AUTH LOGIN");
if ((ret = recvlines(buffer, MAX_INPUT_BUFFER)) <= 0) {
xasprintf(&error_msg, _("recv() failed after AUTH LOGIN, "));
result = STATE_WARNING;
break;
}
if (verbose)
printf (_("received %s\n"), buffer);
if (strncmp (buffer, "334", 3) != 0) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("invalid response received after AUTH LOGIN, "));
break;
}
/* encode authuser with base64 */
base64_encode_alloc (authuser, strlen(authuser), &abuf);
xasprintf(&abuf, "%s\r\n", abuf);
my_send(abuf, strlen(abuf));
if (verbose)
printf (_("sent %s\n"), abuf);
if ((ret = recvlines(buffer, MAX_INPUT_BUFFER)) <= 0) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("recv() failed after sending authuser, "));
break;
}
if (verbose) {
printf (_("received %s\n"), buffer);
}
if (strncmp (buffer, "334", 3) != 0) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("invalid response received after authuser, "));
break;
}
/* encode authpass with base64 */
base64_encode_alloc (authpass, strlen(authpass), &abuf);
xasprintf(&abuf, "%s\r\n", abuf);
my_send(abuf, strlen(abuf));
if (verbose) {
printf (_("sent %s\n"), abuf);
}
if ((ret = recvlines(buffer, MAX_INPUT_BUFFER)) <= 0) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("recv() failed after sending authpass, "));
break;
}
if (verbose) {
printf (_("received %s\n"), buffer);
}
if (strncmp (buffer, "235", 3) != 0) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("invalid response received after authpass, "));
break;
}
break;
} while (0);
} else {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("only authtype LOGIN is supported, "));
}
}
/* tell the server we're done */
smtp_quit();
/* finally close the connection */
close (sd);
}
/* reset the alarm */
alarm (0);
microsec = deltime (tv);
elapsed_time = (double)microsec / 1.0e6;
if (result == STATE_OK) {
if (check_critical_time && elapsed_time > critical_time)
result = STATE_CRITICAL;
else if (check_warning_time && elapsed_time > warning_time)
result = STATE_WARNING;
}
printf (_("SMTP %s - %s%.3f sec. response time%s%s|%s\n"),
state_text (result),
error_msg,
elapsed_time,
verbose?", ":"", verbose?buffer:"",
fperfdata ("time", elapsed_time, "s",
(int)check_warning_time, warning_time,
(int)check_critical_time, critical_time,
TRUE, 0, FALSE, 0));
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
char* temp;
int option = 0;
static struct option longopts[] = {
{"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'},
{"fqdn", required_argument, 0, 'F'},
{"authtype", required_argument, 0, 'A'},
{"authuser", required_argument, 0, 'U'},
{"authpass", required_argument, 0, 'P'},
{"command", required_argument, 0, 'C'},
{"response", required_argument, 0, 'R'},
{"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'},
{"starttls",no_argument,0,'S'},
{"certificate",required_argument,0,'D'},
{"ignore-quit-failure",no_argument,0,'q'},
{0, 0, 0, 0}
};
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");
}
while (1) {
c = getopt_long (argc, argv, "+hVv46t:p:f:e:c:w:H:C:R:SD:F:A:U:P:q",
longopts, &option);
if (c == -1 || c == EOF)
break;
switch (c) {
case 'H': /* hostname */
if (is_host (optarg)) {
server_address = optarg;
}
else {
usage2 (_("Invalid hostname/address"), optarg);
}
break;
case 'p': /* port */
if (is_intpos (optarg))
server_port = atoi (optarg);
else
usage4 (_("Port must be a positive integer"));
break;
case 'F':
/* localhostname */
localhostname = strdup(optarg);
break;
case 'f': /* from argument */
from_arg = optarg + strspn(optarg, "<");
from_arg = strndup(from_arg, strcspn(from_arg, ">"));
send_mail_from = 1;
break;
case 'A':
authtype = optarg;
use_ehlo = TRUE;
break;
case 'U':
authuser = optarg;
break;
case 'P':
authpass = optarg;
break;
case 'e': /* server expect string on 220 */
server_expect = optarg;
break;
case 'C': /* commands */
if (ncommands >= command_size) {
command_size+=8;
commands = realloc (commands, sizeof(char *) * command_size);
if (commands == NULL)
die (STATE_UNKNOWN,
_("Could not realloc() units [%d]\n"), ncommands);
}
commands[ncommands] = (char *) malloc (sizeof(char) * 255);
strncpy (commands[ncommands], optarg, 255);
ncommands++;
break;
case 'R': /* server responses */
if (nresponses >= response_size) {
response_size += 8;
responses = realloc (responses, sizeof(char *) * response_size);
if (responses == NULL)
die (STATE_UNKNOWN,
_("Could not realloc() units [%d]\n"), nresponses);
}
responses[nresponses] = (char *) malloc (sizeof(char) * 255);
strncpy (responses[nresponses], optarg, 255);
nresponses++;
break;
case 'c': /* critical time threshold */
if (!is_nonnegative (optarg))
usage4 (_("Critical time must be a positive"));
else {
critical_time = strtod (optarg, NULL);
check_critical_time = TRUE;
}
break;
case 'w': /* warning time threshold */
if (!is_nonnegative (optarg))
usage4 (_("Warning time must be a positive"));
else {
warning_time = strtod (optarg, NULL);
check_warning_time = TRUE;
}
break;
case 'v': /* verbose */
verbose++;
break;
case 'q':
ignore_send_quit_failure++; /* ignore problem sending QUIT */
break;
case 't': /* timeout */
if (is_intnonneg (optarg)) {
socket_timeout = atoi (optarg);
}
else {
usage4 (_("Timeout interval must be a positive integer"));
}
break;
case 'D':
/* Check SSL cert validity */
#ifdef USE_OPENSSL
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;
ignore_send_quit_failure = TRUE;
#else
usage (_("SSL support not available - install OpenSSL and recompile"));
#endif
case 'S':
/* starttls */
use_ssl = TRUE;
use_ehlo = TRUE;
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': /* version */
print_revision (progname, NP_VERSION);
exit (STATE_UNKNOWN);
case 'h': /* help */
print_help ();
exit (STATE_UNKNOWN);
case '?': /* help */
usage5 ();
}
}
c = optind;
if (server_address == NULL) {
if (argv[c]) {
if (is_host (argv[c]))
server_address = argv[c];
else
usage2 (_("Invalid hostname/address"), argv[c]);
}
else {
xasprintf (&server_address, "127.0.0.1");
}
}
if (server_expect == NULL)
server_expect = strdup (SMTP_EXPECT);
if (mail_command == NULL)
mail_command = strdup("MAIL ");
if (from_arg==NULL)
from_arg = strdup(" ");
return validate_arguments ();
}
int
validate_arguments (void)
{
return OK;
}
void
smtp_quit(void)
{
int bytes;
int n;
n = my_send(SMTP_QUIT, strlen(SMTP_QUIT));
if(n < 0) {
if(ignore_send_quit_failure) {
if(verbose) {
printf(_("Connection closed by server before sending QUIT command\n"));
}
return;
}
die (STATE_UNKNOWN,
_("Connection closed by server before sending QUIT command\n"));
}
if (verbose)
printf(_("sent %s\n"), "QUIT");
/* read the response but don't care about problems */
bytes = recvlines(buffer, MAX_INPUT_BUFFER);
if (verbose) {
if (bytes < 0)
printf(_("recv() failed after QUIT."));
else if (bytes == 0)
printf(_("Connection reset by peer."));
else {
buffer[bytes] = '\0';
printf(_("received %s\n"), buffer);
}
}
}
/*
* Receive one line, copy it into buf and nul-terminate it. Returns the
* number of bytes written to buf (excluding the '\0') or 0 on EOF or <0 on
* error.
*
* TODO: Reading one byte at a time is very inefficient. Replace this by a
* function which buffers the data, move that to netutils.c and change
* check_smtp and other plugins to use that. Also, remove (\r)\n.
*/
int
recvline(char *buf, size_t bufsize)
{
int result;
unsigned i;
for (i = result = 0; i < bufsize - 1; i++) {
if ((result = my_recv(&buf[i], 1)) != 1)
break;
if (buf[i] == '\n') {
buf[++i] = '\0';
return i;
}
}
return (result == 1 || i == 0) ? -2 : result; /* -2 if out of space */
}
/*
* Receive one or more lines, copy them into buf and nul-terminate it. Returns
* the number of bytes written to buf (excluding the '\0') or 0 on EOF or <0 on
* error. Works for all protocols which format multiline replies as follows:
*
* ``The format for multiline replies requires that every line, except the last,
* begin with the reply code, followed immediately by a hyphen, `-' (also known
* as minus), followed by text. The last line will begin with the reply code,
* followed immediately by <SP>, optionally some text, and <CRLF>. As noted
* above, servers SHOULD send the <SP> if subsequent text is not sent, but
* clients MUST be prepared for it to be omitted.'' (RFC 2821, 4.2.1)
*
* TODO: Move this to netutils.c. Also, remove \r and possibly the final \n.
*/
int
recvlines(char *buf, size_t bufsize)
{
int result, i;
for (i = 0; /* forever */; i += result)
if (!((result = recvline(buf + i, bufsize - i)) > 3 &&
isdigit((int)buf[i]) &&
isdigit((int)buf[i + 1]) &&
isdigit((int)buf[i + 2]) &&
buf[i + 3] == '-'))
break;
return (result <= 0) ? result : result + i;
}
int
my_close (void)
{
int result;
result = close(sd);
#ifdef HAVE_SSL
np_net_ssl_cleanup();
#endif
return result;
}
void
print_help (void)
{
char *myport;
xasprintf (&myport, "%d", SMTP_PORT);
print_revision (progname, NP_VERSION);
printf ("Copyright (c) 1999-2001 Ethan Galstad <nagios@nagios.org>\n");
printf (COPYRIGHT, copyright, email);
printf("%s\n", _("This plugin will attempt to open an SMTP connection with the host."));
printf ("\n\n");
print_usage ();
printf (UT_HELP_VRSN);
printf (UT_EXTRA_OPTS);
printf (UT_HOST_PORT, 'p', myport);
printf (UT_IPv46);
printf (" %s\n", "-e, --expect=STRING");
printf (_(" String to expect in first line of server response (default: '%s')\n"), SMTP_EXPECT);
printf (" %s\n", "-C, --command=STRING");
printf (" %s\n", _("SMTP command (may be used repeatedly)"));
printf (" %s\n", "-R, --response=STRING");
printf (" %s\n", _("Expected response to command (may be used repeatedly)"));
printf (" %s\n", "-f, --from=STRING");
printf (" %s\n", _("FROM-address to include in MAIL command, required by Exchange 2000")),
printf (" %s\n", "-F, --fqdn=STRING");
printf (" %s\n", _("FQDN used for HELO"));
#ifdef HAVE_SSL
printf (" %s\n", "-D, --certificate=INTEGER[,INTEGER]");
printf (" %s\n", _("Minimum number of days a certificate has to be valid."));
printf (" %s\n", "-S, --starttls");
printf (" %s\n", _("Use STARTTLS for the connection."));
#endif
printf (" %s\n", "-A, --authtype=STRING");
printf (" %s\n", _("SMTP AUTH type to check (default none, only LOGIN supported)"));
printf (" %s\n", "-U, --authuser=STRING");
printf (" %s\n", _("SMTP AUTH username"));
printf (" %s\n", "-P, --authpass=STRING");
printf (" %s\n", _("SMTP AUTH password"));
printf (" %s\n", "-q, --ignore-quit-failure");
printf (" %s\n", _("Ignore failure when sending QUIT command to server"));
printf (UT_WARN_CRIT);
printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
printf (UT_VERBOSE);
printf("\n");
printf ("%s\n", _("Successul connects return STATE_OK, refusals and timeouts return"));
printf ("%s\n", _("STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful"));
printf ("%s\n", _("connects, but incorrect response messages from the host result in"));
printf ("%s\n", _("STATE_WARNING return values."));
printf (UT_SUPPORT);
}
void
print_usage (void)
{
printf ("%s\n", _("Usage:"));
printf ("%s -H host [-p port] [-4|-6] [-e expect] [-C command] [-R response] [-f from addr]\n", progname);
printf ("[-A authtype -U authuser -P authpass] [-w warn] [-c crit] [-t timeout] [-q]\n");
printf ("[-F fqdn] [-S] [-D warn days cert expire[,crit days cert expire]] [-v] \n");
}
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