3 files changed, 41 insertions, 6 deletions

diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c
index 7d11551..5bec291 100644
--- a/plugins/check_tcp.c
+++ b/plugins/check_tcp.c
@@ -28,7 +28,7 @@ This plugin tests %s connections with the specified host.\n";
 
 const char *option_summary = "\
 -H host -p port [-w warn_time] [-c crit_time] [-s send]\n\
-        [-e expect] [-W wait] [-t to_sec] [-v]\n";
+        [-e expect] [-W wait] [-t to_sec] [-r refuse_state] [-v]\n";
 
 const char *options = "\
  -H, --hostname=ADDRESS\n\
@@ -48,6 +48,8 @@ const char *options = "\
     Response time to result in critical status (seconds)\n\
  -t, --timeout=INTEGER\n\
     Seconds before connection times out (default: %d)\n\
+ -r, --refuse=ok|warn|crit\n\
+    Accept tcp refusals with states ok, warn, crit (default: crit)\n\
  -v\n\
     Show details for command-line debugging (do not use with nagios server)\n\
  -h, --help\n\
@@ -337,9 +339,11 @@ main (int argc, char **argv)
         alarm (0);
 
         printf
-                ("%s %s - %.3f second response time on port %d",
+                ("%s %s%s - %.3f second response time on port %d",
                  SERVICE,
-                 state_text (result), elapsed_time, server_port);
+                 state_text (result),
+                 (was_refused) ? " (refused)" : "",
+                 elapsed_time, server_port);
 
         if (status && strlen(status) > 0)
                 printf (" [%s]", status);
@@ -375,6 +379,7 @@ process_arguments (int argc, char **argv)
                 {"expect", required_argument, 0, 'e'},
                 {"quit", required_argument, 0, 'q'},
                 {"delay", required_argument, 0, 'd'},
+                {"refuse", required_argument, 0, 'r'},
                 {"verbose", no_argument, 0, 'v'},
                 {"version", no_argument, 0, 'V'},
                 {"help", no_argument, 0, 'h'},
@@ -402,7 +407,7 @@ process_arguments (int argc, char **argv)
         }
 
         while (1) {
-                c = getopt_long (argc, argv, "+hVvH:s:e:q:c:w:t:p:C:W:d:S", long_options,
+                c = getopt_long (argc, argv, "+hVvH:s:e:q:c:w:t:p:C:W:d:Sr:", long_options,
                                                                          &option_index);
 
                 if (c == -1 || c == EOF || c == 1)
@@ -471,6 +476,16 @@ process_arguments (int argc, char **argv)
                 case 'q':
                         server_quit = optarg;
                         break;
+                case 'r':
+                        if (!strncmp(optarg,"ok",2))
+                                econn_refuse_state = STATE_OK;
+                        else if (!strncmp(optarg,"warn",4))
+                                econn_refuse_state = STATE_WARNING;
+                        else if (!strncmp(optarg,"crit",4))
+                                econn_refuse_state = STATE_CRITICAL;
+                        else
+                                usage ("Refuse mut be one of ok, warn, crit\n");
+                        break;
                 case 'd':
                         if (is_intpos (optarg))
                                 delay = atoi (optarg);
@@ -541,7 +556,7 @@ connect_SSL (void)
   time (&start_time);
 
   /* Make TCP connection */
-  if (my_tcp_connect (server_address, server_port, &sd) == STATE_OK)
+  if (my_tcp_connect (server_address, server_port, &sd) == STATE_OK && was_refused == FALSE)
     {
     /* Do the SSL handshake */
       if ((ssl = SSL_new (ctx)) != NULL)
diff --git a/plugins/netutils.c b/plugins/netutils.c
index 4234c43..b3348d6 100644
--- a/plugins/netutils.c
+++ b/plugins/netutils.c
@@ -32,6 +32,8 @@
 #include "netutils.h"
 
 int socket_timeout = DEFAULT_SOCKET_TIMEOUT; 
+int econn_refuse_state = STATE_CRITICAL;
+int was_refused = FALSE;
 
 /* handles socket timeouts */
 void
@@ -275,8 +277,22 @@ my_connect (char *host_name, int port, int *sd, int proto)
                         /* attempt to open a connection */
                         result = connect (*sd, res->ai_addr, res->ai_addrlen);
 
-                        if (result == 0)
+                        if (result == 0) {
+                                was_refused = FALSE;
                                 break;
+                        }
+
+                        if (result < 0) {
+                                switch (errno) {
+                                        case ECONNREFUSED:
+                                                switch (econn_refuse_state) {
+                                                        case STATE_OK:
+                                                        case STATE_WARNING:
+                                                                was_refused = TRUE;
+                                                }
+                                                break;
+                                }
+                        }
 
                         close (*sd);
                         res = res->ai_next;
@@ -286,6 +302,8 @@ my_connect (char *host_name, int port, int *sd, int proto)
 
         if (result == 0)
                 return STATE_OK;
+        else if (was_refused)
+                return econn_refuse_state;
         else {
                 printf ("%s\n", strerror(errno));
                 return STATE_CRITICAL;
diff --git a/plugins/netutils.h b/plugins/netutils.h
index 6c8eed3..22542a7 100644
--- a/plugins/netutils.h
+++ b/plugins/netutils.h
@@ -60,3 +60,5 @@ int is_inet6_addr (char *);
 int is_hostname (char *);
 
 extern int socket_timeout;
+extern int econn_refuse_state;
+extern int was_refused;