87 lines
3 KiB
C
87 lines
3 KiB
C
/* -*- C -*- */
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/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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#ifndef __SLIP_H__
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#define __SLIP_H__
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#include "contiki.h"
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PROCESS_NAME(slip_process);
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/**
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* Send an IP packet from the uIP buffer with SLIP.
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*/
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uint8_t slip_send(void);
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/**
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* Input a SLIP byte.
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*
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* This function is called by the RS232/SIO device driver to pass
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* incoming bytes to the SLIP driver. The function can be called from
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* an interrupt context.
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*
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* For systems using low-power CPU modes, the return value of the
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* function can be used to determine if the CPU should be woken up or
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* not. If the function returns non-zero, the CPU should be powered
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* up. If the function returns zero, the CPU can continue to be
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* powered down.
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*
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* \param c The data that is to be passed to the SLIP driver
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*
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* \return Non-zero if the CPU should be powered up, zero otherwise.
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*/
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int slip_input_byte(unsigned char c);
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uint8_t slip_write(const void *ptr, int len);
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/* Did we receive any bytes lately? */
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extern uint8_t slip_active;
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/* Statistics. */
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extern uint16_t slip_rubbish, slip_twopackets, slip_overflow, slip_ip_drop;
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/**
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* Set a function to be called when there is activity on the SLIP
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* interface; used for detecting if a node is a gateway node.
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*/
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void slip_set_input_callback(void (*callback)(void));
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/*
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* These machine dependent functions and an interrupt service routine
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* must be provided externally (slip_arch.c).
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*/
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void slip_arch_init(unsigned long ubr);
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void slip_arch_writeb(unsigned char c);
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#endif /* __SLIP_H__ */
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