116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/*
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* Copyright (c) 2011, 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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#include "contiki.h"
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#include "net/netstack.h"
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#include "net/ipv6/uip.h"
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#include "net/packetbuf.h"
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#include "dev/slip.h"
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#include "os/sys/log.h"
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#include <stdio.h>
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#define LOG_MODULE "slip-net"
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#define LOG_LEVEL LOG_LEVEL_NONE
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/*---------------------------------------------------------------------------*/
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#define SLIP_END 0300
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#define SLIP_ESC 0333
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#define SLIP_ESC_END 0334
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#define SLIP_ESC_ESC 0335
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/*---------------------------------------------------------------------------*/
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static void
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slipnet_init(void)
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{
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}
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/*---------------------------------------------------------------------------*/
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void
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slip_send_packet(const uint8_t *ptr, int len)
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{
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uint16_t i;
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uint8_t c;
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slip_arch_writeb(SLIP_END);
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for(i = 0; i < len; ++i) {
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c = *ptr++;
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if(c == SLIP_END) {
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slip_arch_writeb(SLIP_ESC);
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c = SLIP_ESC_END;
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} else if(c == SLIP_ESC) {
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slip_arch_writeb(SLIP_ESC);
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c = SLIP_ESC_ESC;
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}
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slip_arch_writeb(c);
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}
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slip_arch_writeb(SLIP_END);
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}
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/*---------------------------------------------------------------------------*/
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static void
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slipnet_input(void)
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{
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int i;
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/* radio should be configured for filtering so this should be simple */
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/* this should be sent over SLIP! */
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/* so just copy into uip-but and send!!! */
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/* Format: !R<data> ? */
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uip_len = packetbuf_datalen();
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i = packetbuf_copyto(uip_buf);
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LOG_DBG("Slipnet got input of len: %d, copied: %d\n",
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packetbuf_datalen(), i);
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for(i = 0; i < uip_len; i++) {
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LOG_DBG("%02x", (unsigned char)uip_buf[i]);
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if((i & 15) == 15) {
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LOG_DBG_("\n");
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} else if((i & 7) == 7) {
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LOG_DBG_(" ");
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}
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}
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LOG_DBG_("\n");
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slip_send_packet(uip_buf, uip_len);
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}
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/*---------------------------------------------------------------------------*/
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static uint8_t
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slipnet_output(const linkaddr_t *localdest)
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{
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/* do nothing... */
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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const struct network_driver slipnet_driver = {
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"slipnet",
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slipnet_init,
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slipnet_input,
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/* output is likely never called - or at least not used as no IP packets
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should be produced in slip-radio */
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slipnet_output
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};
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/*---------------------------------------------------------------------------*/
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