diff -Naur cups-1.6svn-r10486.orig/cups/request.c cups-1.6svn-r10486/cups/request.c
--- cups-1.6svn-r10486.orig/cups/request.c	2012-05-12 02:07:16.000000000 +0200
+++ cups-1.6svn-r10486/cups/request.c	2012-09-12 09:16:21.888777664 +0200
@@ -46,7 +46,9 @@
 #ifndef O_BINARY
 #  define O_BINARY 0
 #endif /* O_BINARY */
-
+#if defined(__sun)
+#include <inet/tcp.h>            /* need this for TCPS_ESTABLISHED ... */
+#endif
 
 /*
  * 'cupsDoFileRequest()' - Do an IPP request with a file.
@@ -1000,6 +1002,38 @@
     }
   }
 
+#if defined(__sun)
+ /*
+  * Check the connection state.
+  * If the connection wasn't used for some time, the server could close it.
+  * The socket state would change to CLOSE_WAIT in such case.
+  */
+  if (cg->http)
+  {
+    struct tcp_info tcpi;
+    socklen_t len = sizeof(tcpi);
+    memset(&tcpi, 0, sizeof(tcpi));
+
+   /*
+    * Get TCP connection info.
+    */
+    if (getsockopt(cg->http->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) == 0)
+    {
+     /*
+      * Successfully got TCP connection state. Check it.
+      */
+      if (tcpi.tcpi_state != TCPS_ESTABLISHED)
+      {
+       /*
+        * Need to close the current connection.
+        */
+        httpClose(cg->http);
+        cg->http = NULL;
+      }
+    }
+  }
+#endif
+
  /*
   * (Re)connect as needed...
   */