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-rw-r--r--plugins/check_smtp.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c
index eaa7eeba..70191ad9 100644
--- a/plugins/check_smtp.c
+++ b/plugins/check_smtp.c
@@ -3,7 +3,7 @@
3* Monitoring check_smtp plugin 3* Monitoring check_smtp plugin
4* 4*
5* License: GPL 5* License: GPL
6* Copyright (c) 2000-2007 Monitoring Plugins Development Team 6* Copyright (c) 2000-2023 Monitoring Plugins Development Team
7* 7*
8* Description: 8* Description:
9* 9*
@@ -52,6 +52,7 @@ int days_till_exp_warn, days_till_exp_crit;
52enum { 52enum {
53 SMTP_PORT = 25 53 SMTP_PORT = 25
54}; 54};
55#define PROXY_PREFIX "PROXY TCP4 0.0.0.0 0.0.0.0 25 25\r\n"
55#define SMTP_EXPECT "220" 56#define SMTP_EXPECT "220"
56#define SMTP_HELO "HELO " 57#define SMTP_HELO "HELO "
57#define SMTP_EHLO "EHLO " 58#define SMTP_EHLO "EHLO "
@@ -102,6 +103,7 @@ double critical_time = 0;
102int check_critical_time = FALSE; 103int check_critical_time = FALSE;
103int verbose = 0; 104int verbose = 0;
104int use_ssl = FALSE; 105int use_ssl = FALSE;
106short use_proxy_prefix = FALSE;
105short use_ehlo = FALSE; 107short use_ehlo = FALSE;
106short use_lhlo = FALSE; 108short use_lhlo = FALSE;
107short ssl_established = 0; 109short ssl_established = 0;
@@ -184,6 +186,13 @@ main (int argc, char **argv)
184 186
185 if (result == STATE_OK) { /* we connected */ 187 if (result == STATE_OK) { /* we connected */
186 188
189 /* If requested, send PROXY header */
190 if (use_proxy_prefix) {
191 if (verbose)
192 printf ("Sending header %s\n", PROXY_PREFIX);
193 send(sd, PROXY_PREFIX, strlen(PROXY_PREFIX), 0);
194 }
195
187 /* watch for the SMTP connection string and */ 196 /* watch for the SMTP connection string and */
188 /* return a WARNING status if we couldn't read any data */ 197 /* return a WARNING status if we couldn't read any data */
189 if (recvlines(buffer, MAX_INPUT_BUFFER) <= 0) { 198 if (recvlines(buffer, MAX_INPUT_BUFFER) <= 0) {
@@ -478,6 +487,7 @@ process_arguments (int argc, char **argv)
478 {"starttls",no_argument,0,'S'}, 487 {"starttls",no_argument,0,'S'},
479 {"certificate",required_argument,0,'D'}, 488 {"certificate",required_argument,0,'D'},
480 {"ignore-quit-failure",no_argument,0,'q'}, 489 {"ignore-quit-failure",no_argument,0,'q'},
490 {"proxy",no_argument,0,'r'},
481 {0, 0, 0, 0} 491 {0, 0, 0, 0}
482 }; 492 };
483 493
@@ -494,7 +504,7 @@ process_arguments (int argc, char **argv)
494 } 504 }
495 505
496 while (1) { 506 while (1) {
497 c = getopt_long (argc, argv, "+hVv46Lt:p:f:e:c:w:H:C:R:SD:F:A:U:P:q", 507 c = getopt_long (argc, argv, "+hVv46Lrt:p:f:e:c:w:H:C:R:SD:F:A:U:P:q",
498 longopts, &option); 508 longopts, &option);
499 509
500 if (c == -1 || c == EOF) 510 if (c == -1 || c == EOF)
@@ -621,6 +631,9 @@ process_arguments (int argc, char **argv)
621 use_ssl = TRUE; 631 use_ssl = TRUE;
622 use_ehlo = TRUE; 632 use_ehlo = TRUE;
623 break; 633 break;
634 case 'r':
635 use_proxy_prefix = TRUE;
636 break;
624 case 'L': 637 case 'L':
625 use_lhlo = TRUE; 638 use_lhlo = TRUE;
626 break; 639 break;
@@ -819,6 +832,8 @@ print_help (void)
819 printf (" %s\n", _("FROM-address to include in MAIL command, required by Exchange 2000")), 832 printf (" %s\n", _("FROM-address to include in MAIL command, required by Exchange 2000")),
820 printf (" %s\n", "-F, --fqdn=STRING"); 833 printf (" %s\n", "-F, --fqdn=STRING");
821 printf (" %s\n", _("FQDN used for HELO")); 834 printf (" %s\n", _("FQDN used for HELO"));
835 printf (" %s\n", "-r, --proxy");
836 printf (" %s\n", _("Use PROXY protocol prefix for the connection."));
822#ifdef HAVE_SSL 837#ifdef HAVE_SSL
823 printf (" %s\n", "-D, --certificate=INTEGER[,INTEGER]"); 838 printf (" %s\n", "-D, --certificate=INTEGER[,INTEGER]");
824 printf (" %s\n", _("Minimum number of days a certificate has to be valid.")); 839 printf (" %s\n", _("Minimum number of days a certificate has to be valid."));
@@ -860,6 +875,6 @@ print_usage (void)
860 printf ("%s\n", _("Usage:")); 875 printf ("%s\n", _("Usage:"));
861 printf ("%s -H host [-p port] [-4|-6] [-e expect] [-C command] [-R response] [-f from addr]\n", progname); 876 printf ("%s -H host [-p port] [-4|-6] [-e expect] [-C command] [-R response] [-f from addr]\n", progname);
862 printf ("[-A authtype -U authuser -P authpass] [-w warn] [-c crit] [-t timeout] [-q]\n"); 877 printf ("[-A authtype -U authuser -P authpass] [-w warn] [-c crit] [-t timeout] [-q]\n");
863 printf ("[-F fqdn] [-S] [-L] [-D warn days cert expire[,crit days cert expire]] [-v] \n"); 878 printf ("[-F fqdn] [-S] [-L] [-D warn days cert expire[,crit days cert expire]] [-r] [-v] \n");
864} 879}
865 880