- 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

1 files changed, 42 insertions, 22 deletions

diff --git a/plugins/netutils.c b/plugins/netutils.c
index 08245276..6f3a1510 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)