drivers/net: Move the Telnet driver from apps/netutils/netnetd to drivers/net

ChangeLog

@@ -11216,4 +11216,7 @@
 	* arch/arm/src/samv7:  Port the WDT driver from the SAMA5D3/4 to the
 	  SAMV7 (s015-12-06).
 	* arch/arm/src/samv7:  Add an RSWDT driver (2015-12-06).
+	* drivers/net/telnet.c:  Move the Telnet driver from apps/netutils/telnetd
+	  to drivers/net.  It is a driver a belongs in the OS.  There are still
+	  some interface related issues, however (2015-12-07).
 

drivers/net/Kconfig

@@ -16,6 +16,33 @@ config NETDEV_LOOPBACK
 		networking devices that are enabled must be compatible with
 		CONFIG_NET_NOINTS.
 
+config NETDEV_TELNET
+	bool "Telnet driver"
+	default n
+	depends on NET && NET_TCP
+	---help---
+		The Telnet driver generates a character driver instance to support a
+		Telnet session.  This driver is used by the Telnet daemon.  The
+		Telnet daeman will instantiate a new Telnet driver to support
+		standard I/O on the new Telnet session.
+
+if NETDEV_TELNET
+
+config TELNET_RXBUFFER_SIZE
+	int "Telnet RX buffer size"
+	default 256
+
+config TELNET_TXBUFFER_SIZE
+	int "Telnet TX buffer size"
+	default 256
+
+config TELNET_DUMPBUFFER
+	bool "Dump Telnet buffers"
+	default n
+	depends on DEBUG_NET
+
+endif # NETDEV_TELNET
+
 config NETDEV_MULTINIC
 	bool "Multiple network interface support"
 	default n if !NETDEV_LOOPBACK

drivers/net/Make.defs

@@ -43,6 +43,10 @@ ifeq ($(CONFIG_NETDEV_LOOPBACK),y)
   CSRCS += loopback.c
 endif
 
+ifeq ($(CONFIG_NETDEV_TELNET),y)
+  CSRCS += telnet.c
+endif
+
 ifeq ($(CONFIG_NET_DM90x0),y)
   CSRCS += dm90x0.c
 endif

include/nuttx/net/telnet.h

@@ -0,0 +1,69 @@
+/****************************************************************************
+ * include/nuttx/net/telnet.h
+ *
+ *   Copyright (C) 2012, 2015 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 Gregory Nutt 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.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_NET_TELNET_H
+#define __INCLUDE_NUTTX_NET_TELNET_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: telnet_driver
+ *
+ * Description:
+ *   Create a character driver to "wrap" the telnet session.  This function
+ *   will select and return a unique path for the new telnet device.
+ *
+ * Parameters:
+ *   sd - The socket descriptor that represents the new telnet connection.
+ *
+ * Return:
+ *   An allocated string represent the full path to the created driver.  The
+ *   receiver of the string must de-allocate this memory when it is no longer
+ *   needed.  NULL is returned on a failure.
+ *
+ ****************************************************************************/
+
+FAR char *telnet_driver(int sd);
+
+#endif /* __INCLUDE_NUTTX_NET_TELNET_H */
+