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+/****************************************************************************
+ * net/listen.c
+ *
+ * Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <errno.h>
+
+#include "net-internal.h"
+
+/****************************************************************************
+ * Global Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: listen
+ *
+ * Description:
+ * To accept connections, a socket is first created with socket(), a
+ * willingness to accept incoming connections and a queue limit for incoming
+ * connections are specified with listen, and then the connections are
+ * accepted with accept(). The listen() call applies only to sockets of
+ * type SOCK_STREAM or SOCK_SEQPACKET.
+ *
+ * Parameters:
+ * sockfd Socket descriptor of the bound socket
+ * backlog The maximum length the queue of pending connections may grow.
+ * If a connection request arrives with the queue full, the client
+ * may receive an error with an indication of ECONNREFUSED or,
+ * if the underlying protocol supports retransmission, the request
+ * may be ignored so that retries succeed.
+ *
+ * Returned Value:
+ * On success, zero is returned. On error, -1 is returned, and errno is set
+ * appropriately.
+ *
+ * EADDRINUSE
+ * Another socket is already listening on the same port.
+ * EBADF
+ * The argument 'sockfd' is not a valid descriptor.
+ * ENOTSOCK
+ * The argument 'sockfd' is not a socket.
+ * EOPNOTSUPP
+ * The socket is not of a type that supports the listen operation.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int listen(int sockfd, int backlog)
+{
+ *get_errno_ptr() = ENOSYS;
+ return ERROR;
+}
+
+#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */