| /* -*- C -*- */ |
| /* |
| * Copyright (c) 2005, 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 Contiki operating system. |
| * |
| */ |
| |
| #ifndef SLIP_H_ |
| #define SLIP_H_ |
| |
| #if defined(CONFIG_NETWORKING_UART) |
| |
| #include <net/net_core.h> |
| |
| #include "contiki.h" |
| |
| PROCESS_NAME(slip_process); |
| |
| /** |
| * Send an IP packet from the uIP buffer with SLIP. |
| */ |
| uint8_t slip_send(struct net_buf *buf); |
| |
| /** |
| * Input a SLIP byte. |
| * |
| * This function is called by the RS232/SIO device driver to pass |
| * incoming bytes to the SLIP driver. The function can be called from |
| * an interrupt context. |
| * |
| * For systems using low-power CPU modes, the return value of the |
| * function can be used to determine if the CPU should be woken up or |
| * not. If the function returns non-zero, the CPU should be powered |
| * up. If the function returns zero, the CPU can continue to be |
| * powered down. |
| * |
| * \param c The data that is to be passed to the SLIP driver |
| * |
| * \return Non-zero if the CPU should be powered up, zero otherwise. |
| */ |
| int slip_input_byte(unsigned char c); |
| |
| uint8_t slip_write(const void *ptr, int len); |
| |
| /* Did we receive any bytes lately? */ |
| extern uint8_t slip_active; |
| |
| /* Statistics. */ |
| extern uint16_t slip_rubbish, slip_twopackets, slip_overflow, slip_ip_drop; |
| |
| /** |
| * Set a function to be called when there is activity on the SLIP |
| * interface; used for detecting if a node is a gateway node. |
| */ |
| void slip_set_input_callback(void (*callback)(void)); |
| |
| /* |
| * These machine dependent functions and an interrupt service routine |
| * must be provided externally (slip_arch.c). |
| */ |
| void slip_arch_init(unsigned long ubr); |
| void slip_arch_writeb(unsigned char c); |
| |
| void slip_start(void); |
| |
| void slip_recv(void); |
| |
| /* We do not want the packet to directly go to tcpip_input() because |
| * the packet is received in interrupt context. We instead use the |
| * net_recv() to place the packet into rx fiber which then calls |
| * the tcpip_input() |
| */ |
| #define SLIP_CONF_TCPIP_INPUT(buf) net_recv(buf) |
| |
| #else /* defined(CONFIG_NETWORKING_UART) */ |
| |
| #define slip_start(...) |
| #define slip_recv(...) |
| |
| #endif /* defined(CONFIG_NETWORKING_UART) */ |
| |
| #endif /* SLIP_H_ */ |