text: /****************************************************************************
   *
   * Copyright 2016 Samsung Electronics All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied. See the License for the specific
   * language governing permissions and limitations under the License.
   *
   ****************************************************************************/
  /*
   * Copyright (c) 2001, Swedish Institute of Computer Science.
   * All rights reserved.
   *
   * 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
   *
   * This file is part of the lwIP TCP/IP stack.
   *
   * Author: Adam Dunkels <adam@sics.se>
   *
   */
  #ifndef __NETIF_SLIPIF_H__
  #define __NETIF_SLIPIF_H__
  
  #include "lwip/opt.h"
  #include "lwip/netif.h"
  
  /** Set this to 1 to start a thread that blocks reading on the serial line
   * (using sio_read()).
   */
  #ifndef SLIP_USE_RX_THREAD
  #define SLIP_USE_RX_THREAD !NO_SYS
  #endif
  
  /** Set this to 1 to enable functions to pass in RX bytes from ISR context.
   * If enabled, slipif_received_byte[s]() process incoming bytes and put assembled
   * packets on a queue, which is fed into lwIP from slipif_poll().
   * If disabled, slipif_poll() polls the serila line (using sio_tryread()).
   */
  #ifndef SLIP_RX_FROM_ISR
  #define SLIP_RX_FROM_ISR 0
  #endif
  
  /** Set this to 1 (default for SLIP_RX_FROM_ISR) to queue incoming packets
   * received by slipif_received_byte[s]() as long as PBUF_POOL pbufs are available.
   * If disabled, packets will be dropped if more than one packet is received.
   */
  #ifndef SLIP_RX_QUEUE
  #define SLIP_RX_QUEUE SLIP_RX_FROM_ISR
  #endif
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  	err_t slipif_init(struct netif *netif);
  	void slipif_poll(struct netif *netif);
  #if SLIP_RX_FROM_ISR
  	void slipif_process_rxqueue(struct netif *netif);
  	void slipif_received_byte(struct netif *netif, u8_t data);
  	void slipif_received_bytes(struct netif *netif, u8_t * data, u8_t len);
  #endif							/* SLIP_RX_FROM_ISR */
  
  #ifdef __cplusplus
  }
  #endif
  #endif
  