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 = "";
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;
}
else {
if (verbose)
printf ("%s", buffer);
/* 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)
printf (_("Invalid SMTP response received from host: %s\n"), buffer);
else
printf (_("Invalid SMTP response received from host on port %d: %s\n"),
server_port, buffer);
return STATE_WARNING;
}
}
/* 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, server_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"));
np_net_ssl_cleanup();
close(sd);
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);
my_close();
return result;
}
# endif /* USE_OPENSSL */
}
#endif
if (send_mail_from) {
my_send(cmd_str, strlen(cmd_str));
if (recvlines(buffer, MAX_INPUT_BUFFER) >= 1 && verbose)
printf("%s", buffer);
}
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;
}
int
main (int argc, char **argv)
{
int result = STATE_UNKNOWN;
int i;
char *status = NULL;
struct timeval tv;
size_t len;
int match = -1;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
/* determine program- and service-name quickly */
progname = strrchr(argv[0], '/');
if(progname != NULL) progname++;
else progname = argv[0];
len = strlen(progname);
if(len > 6 && !memcmp(progname, "check_", 6)) {
SERVICE = strdup(progname + 6);
for(i = 0; i < len - 6; i++)
SERVICE[i] = toupper(SERVICE[i]);
}
/* set up a resonable buffer at first (will be realloc()'ed if
* user specifies other options) */
server_expect = calloc(sizeof(char *), 2);
/* determine defaults for this service's protocol */
if (!strncmp(SERVICE, "UDP", 3)) {
PROTOCOL = IPPROTO_UDP;
}
else if (!strncmp(SERVICE, "FTP", 3)) {
EXPECT = "220";
QUIT = "QUIT\r\n";
PORT = 21;
}
else if (!strncmp(SERVICE, "POP", 3) || !strncmp(SERVICE, "POP3", 4)) {
EXPECT = "+OK";
QUIT = "QUIT\r\n";
PORT = 110;
}
else if (!strncmp(SERVICE, "SMTP", 4)) {
EXPECT = "220";
QUIT = "QUIT\r\n";
PORT = 25;
}
else if (!strncmp(SERVICE, "IMAP", 4)) {
EXPECT = "* OK";
QUIT = "a1 LOGOUT\r\n";
PORT = 143;
}
#ifdef HAVE_SSL
else if (!strncmp(SERVICE, "SIMAP", 5)) {
EXPECT = "* OK";
QUIT = "a1 LOGOUT\r\n";
flags |= FLAG_SSL;
PORT = 993;
}
else if (!strncmp(SERVICE, "SPOP", 4)) {
EXPECT = "+OK";
QUIT = "QUIT\r\n";
flags |= FLAG_SSL;
PORT = 995;
}
else if (!strncmp(SERVICE, "SSMTP", 5)) {
EXPECT = "220";
QUIT = "QUIT\r\n";
flags |= FLAG_SSL;
PORT = 465;
}
else if (!strncmp(SERVICE, "JABBER", 6)) {
SEND = "<stream:stream to=\'host\' xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'>\n";
EXPECT = "<?xml version=\'1.0\'?><stream:stream xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'";
QUIT = "</stream:stream>\n";
flags |= FLAG_HIDE_OUTPUT;
PORT = 5222;
}
else if (!strncmp (SERVICE, "NNTPS", 5)) {
server_expect_count = 2;
server_expect[0] = "200";
server_expect[1] = "201";
QUIT = "QUIT\r\n";
flags |= FLAG_SSL;
PORT = 563;
}
#endif
else if (!strncmp (SERVICE, "NNTP", 4)) {
server_expect_count = 2;
server_expect = malloc(sizeof(char *) * server_expect_count);
server_expect[0] = strdup("200");
server_expect[1] = strdup("201");
QUIT = "QUIT\r\n";
PORT = 119;
}
else if (!strncmp(SERVICE, "CLAMD", 5)) {
SEND = "PING";
EXPECT = "PONG";
QUIT = NULL;
PORT = 3310;
}
/* fallthrough check, so it's supposed to use reverse matching */
else if (strcmp (SERVICE, "TCP"))
usage (_("CRITICAL - Generic check_tcp called with unknown service\n"));
server_address = "127.0.0.1";
server_port = PORT;
server_send = SEND;
server_quit = QUIT;
status = NULL;
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
if(flags & FLAG_VERBOSE) {
printf("Using service %s\n", SERVICE);
printf("Port: %d\n", server_port);
printf("flags: 0x%x\n", (int)flags);
}
if(EXPECT && !server_expect_count)
server_expect_count++;
if(PROTOCOL==IPPROTO_UDP && !(server_expect_count && server_send)){
usage(_("With UDP checks, a send/expect string must be specified."));
}
/* set up the timer */
signal (SIGALRM, socket_timeout_alarm_handler);
alarm (socket_timeout);
/* try to connect to the host at the given port number */
gettimeofday (&tv, NULL);
result = np_net_connect (server_address, server_port, &sd, PROTOCOL);
if (result == STATE_CRITICAL) return STATE_CRITICAL;
#ifdef HAVE_SSL
if (flags & FLAG_SSL){
result = np_net_ssl_init(sd);
if (result == STATE_OK && check_cert == TRUE) {
result = np_net_ssl_check_cert(days_till_exp);
}
}
if(result != STATE_OK || check_cert == TRUE){
np_net_ssl_cleanup();
if(sd) close(sd);
return result;
}
#endif /* HAVE_SSL */
if (server_send != NULL) { /* Something to send? */
my_send(server_send, strlen(server_send));
}
if (delay > 0) {
tv.tv_sec += delay;
sleep (delay);
}
if(flags & FLAG_VERBOSE) {
if (server_send) {
printf("Send string: %s\n", server_send);
}
if (server_quit) {
printf("Quit string: %s\n", server_quit);
}
printf("server_expect_count: %d\n", (int)server_expect_count);
for(i = 0; i < server_expect_count; i++)
printf("\t%d: %s\n", i, server_expect[i]);
}
/* if(len) later on, we know we have a non-NULL response */
len = 0;
if (server_expect_count) {
/* watch for the expect string */
while ((i = my_recv(buffer, sizeof(buffer))) > 0) {
status = realloc(status, len + i + 1);
memcpy(&status[len], buffer, i);
len += i;
/* stop reading if user-forced or data-starved */
if(i < sizeof(buffer) || (maxbytes && len >= maxbytes))
break;
if (maxbytes && len >= maxbytes)
break;
}
/* no data when expected, so return critical */
if (len == 0)
die (STATE_CRITICAL, _("No data received from host\n"));
/* force null-termination and strip whitespace from end of output */
status[len--] = '\0';
/* print raw output if we're debugging */
if(flags & FLAG_VERBOSE)
printf("received %d bytes from host\n#-raw-recv-------#\n%s\n#-raw-recv-------#\n",
(int)len + 1, status);
while(isspace(status[len])) status[len--] = '\0';
match = np_expect_match(status,
server_expect,
server_expect_count,
(flags & FLAG_MATCH_ALL ? TRUE : FALSE),
(flags & FLAG_EXACT_MATCH ? TRUE : FALSE),
(flags & FLAG_VERBOSE ? TRUE : FALSE));
}
if (server_quit != NULL) {
my_send(server_quit, strlen(server_quit));
}
#ifdef HAVE_SSL
np_net_ssl_cleanup();
#endif
if (sd) close (sd);
microsec = deltime (tv);
elapsed_time = (double)microsec / 1.0e6;
if (flags & FLAG_TIME_CRIT && elapsed_time > critical_time)
result = STATE_CRITICAL;
else if (flags & FLAG_TIME_WARN && elapsed_time > warning_time)
result = STATE_WARNING;
/* did we get the response we hoped? */
if(match == FALSE && result != STATE_CRITICAL)
result = expect_mismatch_state;
/* reset the alarm */
alarm (0);
/* this is a bit stupid, because we don't want to print the
* response time (which can look ok to the user) if we didn't get
* the response we were looking for. if-else */
printf("%s %s - ", SERVICE, state_text(result));
if(match == FALSE && len && !(flags & FLAG_HIDE_OUTPUT))
printf("Unexpected response from host/socket: %s", status);
else {
if(match == FALSE)
printf("Unexpected response from host/socket on ");
else
printf("%.3f second response time on ", elapsed_time);
if(server_address[0] != '/')
printf("port %d", server_port);
else
printf("socket %s", server_address);
}
if (match != FALSE && !(flags & FLAG_HIDE_OUTPUT) && len)
printf (" [%s]", status);
/* perf-data doesn't apply when server doesn't talk properly,
* so print all zeroes on warn and crit. Use fperfdata since
* localisation settings can make different outputs */
if(match == FALSE)
printf ("|%s",
fperfdata ("time", elapsed_time, "s",
(flags & FLAG_TIME_WARN ? TRUE : FALSE), 0,
(flags & FLAG_TIME_CRIT ? TRUE : FALSE), 0,
TRUE, 0,
TRUE, socket_timeout)
);
else
printf("|%s",
fperfdata ("time", elapsed_time, "s",
(flags & FLAG_TIME_WARN ? TRUE : FALSE), warning_time,
(flags & FLAG_TIME_CRIT ? TRUE : FALSE), critical_time,
TRUE, 0,
TRUE, socket_timeout)
);
putchar('\n');
return result;
}
