diff -up nmap-6.01/ncat/ncat_core.c.shutdown nmap-6.01/ncat/ncat_core.c
diff -up nmap-6.01/ncat/ncat_core.h.shutdown nmap-6.01/ncat/ncat_core.h
diff -up nmap-6.01/ncat/ncat_listen.c.shutdown nmap-6.01/ncat/ncat_listen.c
--- nmap-6.01/ncat/ncat_listen.c.shutdown	2012-03-01 07:53:35.000000000 +0100
+++ nmap-6.01/ncat/ncat_listen.c	2012-11-22 18:14:05.991381724 +0100
@@ -317,10 +317,13 @@ static int ncat_listen_stream(int proto)
                 }else {
                     /* Read from stdin and write to all clients. */
                     rc = read_stdin();
-                    if (rc == 0 && o.sendonly)
-                        /* There will be nothing more to send. If we're not
-                           receiving anything, we can quit here. */
-                        return 0;
+                    if (rc == 0) {
+		        if (o.sendonly)
+			    /* There will be nothing more to send. If we're not
+			      receiving anything, we can quit here. */
+			    return 0;
+			shutdown_sockets(SHUT_WR);
+		    }
                     if (rc < 0)
                         return 1;
                 }
@@ -495,6 +498,19 @@ int read_stdin(void)
     return nbytes;
 }
 
+void shutdown_sockets(int how)
+{
+    struct fdinfo *fdn;
+    int i;
+    for (i = 0; i <= broadcast_fdlist.fdmax; i++) {
+        if (!FD_ISSET(i, &master_broadcastfds))
+            continue;
+
+        fdn = get_fdinfo(&broadcast_fdlist, i);
+        shutdown(fdn->fd, how);
+    }
+}
+
 /* Read from a client socket and write to stdout. Return the number of bytes
    read from the socket, or -1 on error. */
 int read_socket(int recv_fd)