- added code to allow check_tcp (via np_net_connect) work with local

  unix sockets.  some testing would be welcome.  based on idea from
  Alex Samorukov.
- also introduced a check_clamd behavior in check_tcp.


git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1261 f882894a-f735-0410-b71e-b25c423dba1c

5 files changed, 69 insertions, 31 deletions

diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 569199d..4c33ee1 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -17,7 +17,7 @@ libexec_PROGRAMS = check_disk check_dummy check_http check_load \
         urlize @EXTRAS@
 
 check_tcp_programs = check_ftp check_imap check_nntp check_pop \
-        check_udp2 @check_tcp_ssl@
+        check_udp2 check_clamd @check_tcp_ssl@
 
 EXTRA_PROGRAMS = check_mysql check_radius check_pgsql check_snmp check_hpjd \
         check_swap check_fping check_ldap check_game check_dig \
diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c
index 1b6513b..3aef1e7 100644
--- a/plugins/check_tcp.c
+++ b/plugins/check_tcp.c
@@ -177,6 +177,12 @@ main (int argc, char **argv)
                 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"));
@@ -318,10 +324,14 @@ main (int argc, char **argv)
         printf(_("%s %s - "), SERVICE, state_text(result));
 
         if(match == -2 && len && !(flags & FLAG_HIDE_OUTPUT))
-                printf("Unexpected response from host: %s", status);
-        else
-                printf("%.3f second response time on port %d",
-                       elapsed_time, server_port);
+                printf("Unexpected response from host/socket: %s", status);
+        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 != -2 && !(flags & FLAG_HIDE_OUTPUT) && len)
                 printf (" [%s]", status);
@@ -431,8 +441,6 @@ process_arguments (int argc, char **argv)
 #endif
                         break;
                 case 'H':                 /* hostname */
-                        if (is_host (optarg) == FALSE)
-                                usage2 (_("Invalid hostname/address"), optarg);
                         server_address = optarg;
                         break;
                 case 'c':                 /* critical */
@@ -542,6 +550,8 @@ process_arguments (int argc, char **argv)
 
         if (server_address == NULL)
                 usage4 (_("You must provide a server address"));
+        else if (is_host (optarg) == FALSE && optarg[0] != '/')
+                usage2 (_("Invalid hostname, address, or socket"), optarg);
 
         return TRUE;
 }
@@ -555,7 +565,7 @@ print_help (void)
         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
         printf (COPYRIGHT, copyright, email);
 
-        printf (_("This plugin tests %s connections with the specified host.\n\n"),
+        printf (_("This plugin tests %s connections with the specified host (or unix socket).\n\n"),
                 SERVICE);
 
         print_usage ();
diff --git a/plugins/netutils.c b/plugins/netutils.c
index 0824527..6f3a151 100644
--- a/plugins/netutils.c
+++ b/plugins/netutils.c
@@ -155,42 +155,46 @@ process_request (const char *server_address, int server_port, int proto,
 }
 
 
-/* opens a tcp or udp connection to a remote host */
+/* opens a tcp or udp connection to a remote host or local socket */
 int
 np_net_connect (const char *host_name, int port, int *sd, int proto)
 {
         struct addrinfo hints;
-        struct addrinfo *res, *res0;
+        struct addrinfo *r, *res;
+        struct sockaddr_un su;
         char port_str[6];
-        int result;
+        int socktype, result;
 
-        memset (&hints, 0, sizeof (hints));
-        hints.ai_family = address_family;
-        hints.ai_protocol = proto;
-        hints.ai_socktype = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM;
+        socktype = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM;
 
-        snprintf (port_str, sizeof (port_str), "%d", port);
-        result = getaddrinfo (host_name, port_str, &hints, &res0);
+        /* as long as it doesn't start with a '/', it's assumed a host or ip */
+        if(host_name[0] != '/'){
+                memset (&hints, 0, sizeof (hints));
+                hints.ai_family = address_family;
+                hints.ai_protocol = proto;
+                hints.ai_socktype = socktype;
 
-        if (result != 0) {
-                printf ("%s\n", gai_strerror (result));
-                return STATE_UNKNOWN;
-        }
-        else {
-                res = res0;
-                while (res) {
+                snprintf (port_str, sizeof (port_str), "%d", port);
+                result = getaddrinfo (host_name, port_str, &hints, &res);
+
+                if (result != 0) {
+                        printf ("%s\n", gai_strerror (result));
+                        return STATE_UNKNOWN;
+                }
+
+                r = res;
+                while (r) {
                         /* attempt to create a socket */
-                        *sd = socket (res->ai_family, (proto == IPPROTO_UDP) ?
-                                      SOCK_DGRAM : SOCK_STREAM, res->ai_protocol);
+                        *sd = socket (r->ai_family, socktype, r->ai_protocol);
 
                         if (*sd < 0) {
                                 printf (_("Socket creation failed\n"));
-                                freeaddrinfo (res);
+                                freeaddrinfo (r);
                                 return STATE_UNKNOWN;
                         }
 
                         /* attempt to open a connection */
-                        result = connect (*sd, res->ai_addr, res->ai_addrlen);
+                        result = connect (*sd, r->ai_addr, r->ai_addrlen);
 
                         if (result == 0) {
                                 was_refused = FALSE;
@@ -206,9 +210,25 @@ np_net_connect (const char *host_name, int port, int *sd, int proto)
                         }
 
                         close (*sd);
-                        res = res->ai_next;
+                        r = r->ai_next;
+                }
+                freeaddrinfo (res);
+        } 
+        /* else the hostname is interpreted as a path to a unix socket */
+        else {
+                if(strlen(host_name) >= UNIX_PATH_MAX){
+                        die(_("Supplied path too long unix domain socket"));
+                }
+                memset(&su, 0, sizeof(su));
+                su.sun_family = AF_UNIX;
+                strncpy(su.sun_path, host_name, UNIX_PATH_MAX);
+                *sd = socket(PF_UNIX, SOCK_STREAM, 0);
+                if(sd < 0){
+                        die(_("Socket creation failed"));
                 }
-                freeaddrinfo (res0);
+                result = connect(*sd, (struct sockaddr *)&su, sizeof(su));
+                if (result < 0 && errno == ECONNREFUSED)
+                        was_refused = TRUE;
         }
 
         if (result == 0)
diff --git a/plugins/netutils.h b/plugins/netutils.h
index 9b0557d..8bc7bd6 100644
--- a/plugins/netutils.h
+++ b/plugins/netutils.h
@@ -40,6 +40,14 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
+#ifdef HAVE_SYS_UN_H
+# include <sys/un.h>
+# ifndef UNIX_PATH_MAX
+   /* linux uses this, on sun it's hard-coded at 108 without a define */
+#  define UNIX_PATH_MAX 108
+# endif /* UNIX_PATH_MAX */
+#endif /* HAVE_SYS_UN_H */
+
 RETSIGTYPE socket_timeout_alarm_handler (int) __attribute__((noreturn));
 
 /* process_request and wrapper macros */
diff --git a/plugins/utils.h b/plugins/utils.h
index ffdb545..2d97634 100644
--- a/plugins/utils.h
+++ b/plugins/utils.h
@@ -139,7 +139,7 @@ char *fperfdata (const char *,
 
 #define UT_HOST_PORT "\
  -H, --hostname=ADDRESS\n\
-    Host name or IP Address\n\
+    Host name, IP Address, or unix socket (must be an absolute path)\n\
  -%c, --port=INTEGER\n\
     Port number (default: %s)\n"