[monitoring-plugins] check_smtp: clang-format
Lorenz Kästle
git at monitoring-plugins.org
Mon Mar 10 21:40:12 CET 2025
Module: monitoring-plugins
Branch: master
Commit: 0867319268898bc63f483e6257c65123e10603ba
Author: Lorenz Kästle <12514511+RincewindsHat at users.noreply.github.com>
Date: Sun Mar 9 23:40:05 2025 +0100
URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=08673192
check_smtp: clang-format
---
plugins/check_smtp.c | 850 +++++++++++++++++++++++++--------------------------
1 file changed, 410 insertions(+), 440 deletions(-)
diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c
index e6369e63..bb45e01b 100644
--- a/plugins/check_smtp.c
+++ b/plugins/check_smtp.c
@@ -1,32 +1,32 @@
/*****************************************************************************
-*
-* Monitoring check_smtp plugin
-*
-* License: GPL
-* Copyright (c) 2000-2024 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/>.
-*
-*
-*****************************************************************************/
+ *
+ * Monitoring check_smtp plugin
+ *
+ * License: GPL
+ * Copyright (c) 2000-2024 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 = "2000-2024";
@@ -42,24 +42,20 @@ const char *email = "devel at monitoring-plugins.org";
#ifdef HAVE_SSL
static bool check_cert = false;
static int days_till_exp_warn, days_till_exp_crit;
-# define my_recv(buf, len) (((use_starttls || use_ssl) && ssl_established) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
-# define my_send(buf, len) (((use_starttls || use_ssl) && ssl_established) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
+# define my_recv(buf, len) (((use_starttls || use_ssl) && ssl_established) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
+# define my_send(buf, len) (((use_starttls || 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)
+# define my_recv(buf, len) read(sd, buf, len)
+# define my_send(buf, len) send(sd, buf, len, 0)
#endif
-enum {
- SMTP_PORT = 25,
- SMTPS_PORT = 465
-};
-#define PROXY_PREFIX "PROXY TCP4 0.0.0.0 0.0.0.0 25 25\r\n"
-#define SMTP_EXPECT "220"
-#define SMTP_HELO "HELO "
-#define SMTP_EHLO "EHLO "
-#define SMTP_LHLO "LHLO "
-#define SMTP_QUIT "QUIT\r\n"
-#define SMTP_STARTTLS "STARTTLS\r\n"
+#define PROXY_PREFIX "PROXY TCP4 0.0.0.0 0.0.0.0 25 25\r\n"
+#define SMTP_EXPECT "220"
+#define SMTP_HELO "HELO "
+#define SMTP_EHLO "EHLO "
+#define SMTP_LHLO "LHLO "
+#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
@@ -81,17 +77,16 @@ static int cflags = REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
static int eflags = 0;
static int errcode, excode;
-static int server_port = SMTP_PORT;
static int server_port_option = 0;
static char *server_address = NULL;
static char *server_expect = NULL;
static char *mail_command = NULL;
static char *from_arg = NULL;
-static int send_mail_from=0;
-static int ncommands=0;
-static int command_size=0;
-static int nresponses=0;
-static int response_size=0;
+static int send_mail_from = 0;
+static int ncommands = 0;
+static int command_size = 0;
+static int nresponses = 0;
+static int response_size = 0;
static char **commands = NULL;
static char **responses = NULL;
static char *authtype = NULL;
@@ -113,15 +108,12 @@ static char *localhostname = NULL;
static int sd;
static char buffer[MAX_INPUT_BUFFER];
enum {
- TCP_PROTOCOL = 1,
- UDP_PROTOCOL = 2,
+ TCP_PROTOCOL = 1,
+ UDP_PROTOCOL = 2,
};
static bool ignore_send_quit_failure = false;
-
-int
-main (int argc, char **argv)
-{
+int main(int argc, char **argv) {
bool supports_tls = false;
int n = 0;
double elapsed_time;
@@ -134,63 +126,68 @@ main (int argc, char **argv)
struct timeval tv;
/* Catch pipe errors in read/write - sometimes occurs when writing QUIT */
- (void) signal (SIGPIPE, SIG_IGN);
+ (void)signal(SIGPIPE, SIG_IGN);
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
/* Parse extra opts if any */
- argv=np_extra_opts (&argc, argv, progname);
+ argv = np_extra_opts(&argc, argv, progname);
- if (process_arguments (argc, argv) == ERROR)
- usage4 (_("Could not parse arguments"));
+ 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){
+ if (!localhostname) {
+ localhostname = malloc(HOST_MAX_BYTES);
+ if (!localhostname) {
printf(_("malloc() failed!\n"));
return STATE_CRITICAL;
}
- if(gethostname(localhostname, HOST_MAX_BYTES)){
+ if (gethostname(localhostname, HOST_MAX_BYTES)) {
printf(_("gethostname() failed!\n"));
return STATE_CRITICAL;
}
}
- if(use_lhlo)
- xasprintf (&helocmd, "%s%s%s", SMTP_LHLO, localhostname, "\r\n");
- else 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)
+ if (use_lhlo) {
+ xasprintf(&helocmd, "%s%s%s", SMTP_LHLO, localhostname, "\r\n");
+ } else 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");
+ xasprintf(&cmd_str, "%sFROM:<%s>%s", mail_command, from_arg, "\r\n");
- if (verbose && send_mail_from)
- printf ("FROM CMD: %s", cmd_str);
+ if (verbose && send_mail_from) {
+ printf("FROM CMD: %s", cmd_str);
+ }
/* initialize alarm signal handling */
- (void) signal (SIGALRM, socket_timeout_alarm_handler);
+ (void)signal(SIGALRM, socket_timeout_alarm_handler);
/* set socket timeout */
- (void) alarm (socket_timeout);
+ (void)alarm(socket_timeout);
/* start timer */
- gettimeofday (&tv, NULL);
+ gettimeofday(&tv, NULL);
/* try to connect to the host at the given port number */
- result = my_tcp_connect (server_address, server_port, &sd);
+ result = my_tcp_connect(server_address, server_port, &sd);
if (result == STATE_OK) { /* we connected */
/* If requested, send PROXY header */
if (use_proxy_prefix) {
- if (verbose)
- printf ("Sending header %s\n", PROXY_PREFIX);
+ if (verbose) {
+ printf("Sending header %s\n", PROXY_PREFIX);
+ }
my_send(PROXY_PREFIX, strlen(PROXY_PREFIX));
}
@@ -198,7 +195,7 @@ main (int argc, char **argv)
if (use_ssl) {
result = np_net_ssl_init_with_hostname(sd, (use_sni ? server_address : NULL));
if (result != STATE_OK) {
- printf (_("CRITICAL - Cannot create SSL context.\n"));
+ printf(_("CRITICAL - Cannot create SSL context.\n"));
close(sd);
np_net_ssl_cleanup();
return STATE_CRITICAL;
@@ -211,7 +208,7 @@ main (int argc, char **argv)
/* 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"));
+ printf(_("recv() failed\n"));
return STATE_WARNING;
}
@@ -223,130 +220,131 @@ main (int argc, char **argv)
/* allow for response to helo command to reach us */
if (recvlines(buffer, MAX_INPUT_BUFFER) <= 0) {
- printf (_("recv() failed\n"));
+ printf(_("recv() failed\n"));
return STATE_WARNING;
- } else if(use_ehlo || use_lhlo){
- if(strstr(buffer, "250 STARTTLS") != NULL ||
- strstr(buffer, "250-STARTTLS") != NULL){
- supports_tls=true;
+ } else if (use_ehlo || use_lhlo) {
+ if (strstr(buffer, "250 STARTTLS") != NULL || strstr(buffer, "250-STARTTLS") != NULL) {
+ supports_tls = true;
}
}
- if(use_starttls && ! supports_tls){
+ if (use_starttls && !supports_tls) {
printf(_("WARNING - TLS not supported by server\n"));
smtp_quit();
return STATE_WARNING;
}
#ifdef HAVE_SSL
- if(use_starttls) {
- /* 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_with_hostname(sd, (use_sni ? server_address : NULL));
- 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);
- }
+ if (use_starttls) {
+ /* 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_with_hostname(sd, (use_sni ? server_address : NULL));
+ 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 */
+# 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);
+ 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);
+ 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);
+ 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);
+ 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");
+ xasprintf(&cmd_str, "%s%s", commands[n], "\r\n");
my_send(cmd_str, strlen(cmd_str));
- if (recvlines(buffer, MAX_INPUT_BUFFER) >= 1 && verbose)
+ if (recvlines(buffer, MAX_INPUT_BUFFER) >= 1 && verbose) {
printf("%s", buffer);
- strip (buffer);
+ }
+ strip(buffer);
if (n < nresponses) {
cflags |= REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
- errcode = regcomp (&preg, responses[n], cflags);
+ errcode = regcomp(&preg, responses[n], cflags);
if (errcode != 0) {
- regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
- printf (_("Could Not Compile Regular Expression"));
+ regerror(errcode, &preg, errbuf, MAX_INPUT_BUFFER);
+ printf(_("Could Not Compile Regular Expression"));
return ERROR;
}
- excode = regexec (&preg, buffer, 10, pmatch, eflags);
+ excode = regexec(&preg, buffer, 10, pmatch, eflags);
if (excode == 0) {
result = STATE_OK;
- }
- else if (excode == REG_NOMATCH) {
+ } 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);
+ 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;
}
}
@@ -354,7 +352,7 @@ main (int argc, char **argv)
}
if (authtype != NULL) {
- if (strcmp (authtype, "LOGIN") == 0) {
+ if (strcmp(authtype, "LOGIN") == 0) {
char *abuf;
int ret;
do {
@@ -371,29 +369,32 @@ main (int argc, char **argv)
/* send AUTH LOGIN */
my_send(SMTP_AUTH_LOGIN, strlen(SMTP_AUTH_LOGIN));
- if (verbose)
- printf (_("sent %s\n"), "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 (verbose) {
+ printf(_("received %s\n"), buffer);
+ }
- if (strncmp (buffer, "334", 3) != 0) {
+ 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);
+ 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 (verbose) {
+ printf(_("sent %s\n"), abuf);
+ }
if ((ret = recvlines(buffer, MAX_INPUT_BUFFER)) <= 0) {
result = STATE_CRITICAL;
@@ -401,19 +402,19 @@ main (int argc, char **argv)
break;
}
if (verbose) {
- printf (_("received %s\n"), buffer);
+ printf(_("received %s\n"), buffer);
}
- if (strncmp (buffer, "334", 3) != 0) {
+ 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);
+ 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);
+ printf(_("sent %s\n"), abuf);
}
if ((ret = recvlines(buffer, MAX_INPUT_BUFFER)) <= 0) {
result = STATE_CRITICAL;
@@ -421,9 +422,9 @@ main (int argc, char **argv)
break;
}
if (verbose) {
- printf (_("received %s\n"), buffer);
+ printf(_("received %s\n"), buffer);
}
- if (strncmp (buffer, "235", 3) != 0) {
+ if (strncmp(buffer, "235", 3) != 0) {
result = STATE_CRITICAL;
xasprintf(&error_msg, _("invalid response received after authpass, "));
break;
@@ -440,120 +441,112 @@ main (int argc, char **argv)
smtp_quit();
/* finally close the connection */
- close (sd);
+ close(sd);
}
/* reset the alarm */
- alarm (0);
+ alarm(0);
- microsec = deltime (tv);
+ microsec = deltime(tv);
elapsed_time = (double)microsec / 1.0e6;
if (result == STATE_OK) {
- if (check_critical_time && elapsed_time > critical_time)
+ if (check_critical_time && elapsed_time > critical_time) {
result = STATE_CRITICAL;
- else if (check_warning_time && elapsed_time > warning_time)
+ } 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));
+ 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 process_arguments(int argc, char **argv) {
int c;
- char* temp;
+ char *temp;
bool implicit_tls = false;
enum {
- SNI_OPTION
+ SNI_OPTION
};
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'},
- {"lmtp", no_argument, 0, 'L'},
- {"ssl", no_argument, 0, 's'},
- {"tls", no_argument, 0, 's'},
- {"starttls",no_argument,0,'S'},
- {"sni", no_argument, 0, SNI_OPTION},
- {"certificate",required_argument,0,'D'},
- {"ignore-quit-failure",no_argument,0,'q'},
- {"proxy",no_argument,0,'r'},
- {0, 0, 0, 0}
- };
-
- if (argc < 2)
+ 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'},
+ {"lmtp", no_argument, 0, 'L'},
+ {"ssl", no_argument, 0, 's'},
+ {"tls", no_argument, 0, 's'},
+ {"starttls", no_argument, 0, 'S'},
+ {"sni", no_argument, 0, SNI_OPTION},
+ {"certificate", required_argument, 0, 'D'},
+ {"ignore-quit-failure", no_argument, 0, 'q'},
+ {"proxy", no_argument, 0, 'r'},
+ {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");
+ 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, "+hVv46Lrt:p:f:e:c:w:H:C:R:sSD:F:A:U:P:q",
- longopts, &option);
+ c = getopt_long(argc, argv, "+hVv46Lrt:p:f:e:c:w:H:C:R:sSD:F:A:U:P:q", longopts, &option);
- if (c == -1 || c == EOF)
+ if (c == -1 || c == EOF) {
break;
+ }
switch (c) {
- case 'H': /* hostname */
- if (is_host (optarg)) {
+ case 'H': /* hostname */
+ if (is_host(optarg)) {
server_address = optarg;
- }
- else {
- usage2 (_("Invalid hostname/address"), optarg);
+ } else {
+ usage2(_("Invalid hostname/address"), optarg);
}
break;
- case 'p': /* port */
- if (is_intpos (optarg))
- server_port_option = atoi (optarg);
- else
- usage4 (_("Port must be a positive integer"));
+ case 'p': /* port */
+ if (is_intpos(optarg)) {
+ server_port_option = atoi(optarg);
+ } else {
+ usage4(_("Port must be a positive integer"));
+ }
break;
case 'F':
- /* localhostname */
+ /* localhostname */
localhostname = strdup(optarg);
break;
- case 'f': /* from argument */
+ case 'f': /* from argument */
from_arg = optarg + strspn(optarg, "<");
from_arg = strndup(from_arg, strcspn(from_arg, ">"));
send_mail_from = 1;
@@ -568,97 +561,98 @@ process_arguments (int argc, char **argv)
case 'P':
authpass = optarg;
break;
- case 'e': /* server expect string on 220 */
+ case 'e': /* server expect string on 220 */
server_expect = optarg;
break;
- case 'C': /* commands */
+ 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);
+ 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);
+ commands[ncommands] = (char *)malloc(sizeof(char) * 255);
+ strncpy(commands[ncommands], optarg, 255);
ncommands++;
break;
- case 'R': /* server responses */
+ 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 = 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);
+ 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);
+ 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);
+ 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 */
+ case 'v': /* verbose */
verbose++;
break;
case 'q':
- ignore_send_quit_failure = true; /* ignore problem sending QUIT */
+ ignore_send_quit_failure = true; /* 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"));
+ 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 */
+ /* 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);
- }
+ 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"));
+ usage(_("SSL support not available - install OpenSSL and recompile"));
#endif
implicit_tls = true;
// fallthrough
case 's':
- /* ssl */
+ /* ssl */
use_ssl = true;
server_port = SMTPS_PORT;
break;
case 'S':
- /* starttls */
+ /* starttls */
use_starttls = true;
use_ehlo = true;
break;
@@ -666,7 +660,7 @@ process_arguments (int argc, char **argv)
#ifdef HAVE_SSL
use_sni = true;
#else
- usage (_("SSL support not available - install OpenSSL and recompile"));
+ usage(_("SSL support not available - install OpenSSL and recompile"));
#endif
break;
case 'r':
@@ -682,48 +676,51 @@ process_arguments (int argc, char **argv)
#ifdef USE_IPV6
address_family = AF_INET6;
#else
- usage4 (_("IPv6 support not available"));
+ 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 ();
+ 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]))
+ if (is_host(argv[c])) {
server_address = argv[c];
- else
- usage2 (_("Invalid hostname/address"), argv[c]);
- }
- else {
- xasprintf (&server_address, "127.0.0.1");
+ } 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 (server_expect == NULL) {
+ server_expect = strdup(SMTP_EXPECT);
+ }
- if (mail_command == NULL)
+ if (mail_command == NULL) {
mail_command = strdup("MAIL ");
+ }
- if (from_arg==NULL)
+ if (from_arg == NULL) {
from_arg = strdup(" ");
+ }
if (use_starttls && use_ssl) {
if (implicit_tls) {
use_ssl = false;
server_port = SMTP_PORT;
} else {
- usage4 (_("Set either -s/--ssl/--tls or -S/--starttls"));
+ usage4(_("Set either -s/--ssl/--tls or -S/--starttls"));
}
}
@@ -731,54 +728,44 @@ process_arguments (int argc, char **argv)
server_port = server_port_option;
}
- return validate_arguments ();
-}
-
-
-
-int
-validate_arguments (void)
-{
- return OK;
+ return validate_arguments();
}
+int validate_arguments(void) { return OK; }
-void
-smtp_quit(void)
-{
+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) {
+ 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"));
+ die(STATE_UNKNOWN, _("Connection closed by server before sending QUIT command\n"));
}
- if (verbose)
+ 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)
+ if (bytes < 0) {
printf(_("recv() failed after QUIT."));
- else if (bytes == 0)
+ } else if (bytes == 0) {
printf(_("Connection reset by peer."));
- else {
+ } 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
@@ -788,24 +775,22 @@ smtp_quit(void)
* 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 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)
+ 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 */
+ 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
@@ -820,26 +805,20 @@ recvline(char *buf, size_t bufsize)
*
* TODO: Move this to netutils.c. Also, remove \r and possibly the final \n.
*/
-int
-recvlines(char *buf, size_t bufsize)
-{
+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] == '-'))
+ 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 my_close(void) {
int result;
result = close(sd);
#ifdef HAVE_SSL
@@ -848,89 +827,80 @@ my_close (void)
return result;
}
-
-void
-print_help (void)
-{
+void print_help(void) {
char *myport;
- xasprintf (&myport, "%d", SMTP_PORT);
+ xasprintf(&myport, "%d", SMTP_PORT);
- print_revision (progname, NP_VERSION);
+ print_revision(progname, NP_VERSION);
- printf ("Copyright (c) 1999-2001 Ethan Galstad <nagios at nagios.org>\n");
- printf (COPYRIGHT, copyright, email);
+ printf("Copyright (c) 1999-2001 Ethan Galstad <nagios at 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");
+ printf("\n\n");
- print_usage ();
+ print_usage();
- printf (UT_HELP_VRSN);
- printf (UT_EXTRA_OPTS);
+ printf(UT_HELP_VRSN);
+ printf(UT_EXTRA_OPTS);
- printf (UT_HOST_PORT, 'p', myport);
+ printf(UT_HOST_PORT, 'p', myport);
- printf (UT_IPv46);
+ 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"));
- printf (" %s\n", "-r, --proxy");
- printf (" %s\n", _("Use PROXY protocol prefix for the connection."));
+ 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"));
+ printf(" %s\n", "-r, --proxy");
+ printf(" %s\n", _("Use PROXY protocol prefix for the connection."));
#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, --ssl, --tls");
- printf (" %s\n", _("Use SSL/TLS for the connection."));
- printf (_(" Sets default port to %d.\n"), SMTPS_PORT);
- printf (" %s\n", "-S, --starttls");
- printf (" %s\n", _("Use STARTTLS for the connection."));
- printf (" %s\n", "--sni");
- printf (" %s\n", _("Enable SSL/TLS hostname extension support (SNI)"));
+ printf(" %s\n", "-D, --certificate=INTEGER[,INTEGER]");
+ printf(" %s\n", _("Minimum number of days a certificate has to be valid."));
+ printf(" %s\n", "-s, --ssl, --tls");
+ printf(" %s\n", _("Use SSL/TLS for the connection."));
+ printf(_(" Sets default port to %d.\n"), SMTPS_PORT);
+ printf(" %s\n", "-S, --starttls");
+ printf(" %s\n", _("Use STARTTLS for the connection."));
+ printf(" %s\n", "--sni");
+ printf(" %s\n", _("Enable SSL/TLS hostname extension support (SNI)"));
#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", "-L, --lmtp");
- printf (" %s\n", _("Send LHLO instead of HELO/EHLO"));
- printf (" %s\n", "-q, --ignore-quit-failure");
- printf (" %s\n", _("Ignore failure when sending QUIT command to server"));
-
- printf (UT_WARN_CRIT);
+ 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", "-L, --lmtp");
+ printf(" %s\n", _("Send LHLO instead of HELO/EHLO"));
+ 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_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
- printf (UT_VERBOSE);
+ printf(UT_VERBOSE);
printf("\n");
- printf ("%s\n", _("Successful 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("%s\n", _("Successful 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);
+ 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] [-L] [-D warn days cert expire[,crit days cert expire]] [-r] [--sni] [-v] \n");
+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] [-L] [-D warn days cert expire[,crit days cert expire]] [-r] [--sni] [-v] \n");
}
-
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