modbus plugin: Use "struct sockaddr_storage" instead of "struct sockaddr".

"struct sockaddr" may be an opaque type.

diff --git a/src/modbus.c b/src/modbus.c
index 93fd54a5184f36752fd0fa7365710e3a397a8114..82213d2c6b62ed21c11e035ad7f79a77c935b6e3 100644 (file)
--- a/src/modbus.c
+++ b/src/modbus.c
@@ -470,11 +470,11 @@ static int mb_read_data (mb_host_t *host, mb_slave_t *slave, /* {{{ */
   }
   else if (host->conntype == MBCONN_TCP)
   {
-    struct sockaddr sockaddr;
-    socklen_t saddrlen = sizeof (sockaddr);
-
+    /* getpeername() is used only to determine if the socket is connected, not
+     * because we're really interested in the peer's IP address. */
     status = getpeername (modbus_get_socket (host->connection),
-        &sockaddr, &saddrlen);
+        (struct sockaddr *) &(struct sockaddr_storage) { 0 },
+        &(socklen_t) { sizeof (struct sockaddr_storage) });
     if (status != 0)
       status = errno;
   }