114 lines
3.7 KiB
C
114 lines
3.7 KiB
C
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/**
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* \addtogroup rimeuc
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* @{
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*/
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/*
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* Copyright (c) 2006, 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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* $Id: uc.c,v 1.10 2007/05/15 08:09:21 adamdunkels Exp $
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*/
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/**
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* \file
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* Single-hop unicast
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "net/rime.h"
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#include "net/rime/uc.h"
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#include <string.h>
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/* XXX This is a hack: MAC protocols may use this address as the
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receiver address of packets. */
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rimeaddr_t uc_receiver;
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struct uc_hdr {
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rimeaddr_t receiver;
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};
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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static void
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recv_from_ibc(struct ibc_conn *ibc, rimeaddr_t *from)
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{
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struct uc_conn *c = (struct uc_conn *)ibc;
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struct uc_hdr *hdr = rimebuf_dataptr();
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PRINTF("%d: uc: recv_from_ibc, receiver %d %p hdr %p\n",
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rimeaddr_node_addr.u16, hdr->receiver.u16, c, hdr);
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if(rimeaddr_cmp(&hdr->receiver, &rimeaddr_node_addr)) {
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rimebuf_hdrreduce(sizeof(struct uc_hdr));
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c->u->recv(c, from);
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}
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}
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/*---------------------------------------------------------------------------*/
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static const struct ibc_callbacks uc = {recv_from_ibc};
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/*---------------------------------------------------------------------------*/
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void
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uc_open(struct uc_conn *c, u16_t channel,
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const struct uc_callbacks *u)
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{
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ibc_open(&c->c, channel, &uc);
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c->u = u;
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}
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/*---------------------------------------------------------------------------*/
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void
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uc_close(struct uc_conn *c)
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{
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ibc_close(&c->c);
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}
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/*---------------------------------------------------------------------------*/
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int
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uc_send(struct uc_conn *c, rimeaddr_t *receiver)
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{
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PRINTF("%d: uc_send to %d\n", rimeaddr_node_addr.u16, receiver->u16);
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if(rimebuf_hdralloc(sizeof(struct uc_hdr))) {
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int ret;
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struct uc_hdr *hdr = rimebuf_hdrptr();
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rimeaddr_copy(&hdr->receiver, receiver);
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rimeaddr_copy(&uc_receiver, receiver);
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ret = ibc_send(&c->c);
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rimeaddr_copy(&uc_receiver, &rimeaddr_null);
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return ret;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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