112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* Copyright (c) 2004, 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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* Author: Adam Dunkels <adam@sics.se>
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*
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* $Id: abc.c,v 1.10 2007/03/28 19:51:33 adamdunkels Exp $
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*/
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/**
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* \addtogroup rimeabc
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* @{
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*/
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/**
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* \file
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* Anonymous best-effort local area Broad Cast (abc)
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "contiki.h"
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#include "net/rime.h"
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struct abc_hdr {
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u16_t channel;
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};
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LIST(channels);
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/*---------------------------------------------------------------------------*/
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void
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abc_open(struct abc_conn *c, u16_t channel,
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const struct abc_callbacks *callbacks)
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{
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c->channel = channel;
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c->u = callbacks;
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list_add(channels, c);
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}
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/*---------------------------------------------------------------------------*/
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void
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abc_close(struct abc_conn *c)
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{
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list_remove(channels, c);
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}
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/*---------------------------------------------------------------------------*/
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int
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abc_send(struct abc_conn *c)
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{
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if(rimebuf_hdralloc(sizeof(struct abc_hdr))) {
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struct abc_hdr *hdr = rimebuf_hdrptr();
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DEBUGF(1, "%d: abc: abc_send on channel %d\n", rimeaddr_node_addr.u16, c->channel);
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hdr->channel = c->channel;
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rimebuf_compact();
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rime_driver_send();
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return 1;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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abc_input_packet(void)
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{
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struct abc_hdr *hdr;
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struct abc_conn *c;
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hdr = rimebuf_dataptr();
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DEBUGF(1, "%d: abc: abc_input_packet on channel %d\n", rimeaddr_node_addr.u16, hdr->channel);
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if(rimebuf_hdrreduce(sizeof(struct abc_hdr))) {
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for(c = list_head(channels); c != NULL; c = c->next) {
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if(c->channel == hdr->channel) {
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c->u->recv(c);
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}
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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