osd-contiki/core/net/rime/uc.c

84 lines
3.1 KiB
C

/*
* Copyright (c) 2006, 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.
*
* $Id: uc.c,v 1.1 2007/02/28 16:38:52 adamdunkels Exp $
*/
/**
* \file
* A brief description of what this file is.
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "net/rime.h"
#include "net/rime/uc.h"
#include <string.h>
struct uc_hdr {
node_id_t receiver_id;
};
/*---------------------------------------------------------------------------*/
static void
recv_from_ibc(struct ibc_conn *ibc, node_id_t from_id)
{
struct uc_conn *c = (struct uc_conn *)ibc;
struct uc_hdr *hdr = rimebuf_dataptr();
DEBUGF(2, "%d: uc: recv_from_ibc, receiver id %d %p hdr %p\n",
node_id, hdr->receiver_id, c, hdr);
if(hdr->receiver_id == node_id) {
rimebuf_hdrreduce(sizeof(struct uc_hdr));
c->u->recv(c, from_id);
}
}
/*---------------------------------------------------------------------------*/
static const struct ibc_ulayer uc = {recv_from_ibc};
/*---------------------------------------------------------------------------*/
void
uc_setup(struct uc_conn *c, u16_t channel,
const struct uc_ulayer *u)
{
ibc_setup(&c->c, channel, &uc);
c->u = u;
}
/*---------------------------------------------------------------------------*/
int
uc_send(struct uc_conn *c, node_id_t receiver_id)
{
DEBUGF(2, "%d: uc_send to %d\n", node_id, receiver_id);
if(rimebuf_hdrextend(sizeof(struct uc_hdr))) {
struct uc_hdr *hdr = rimebuf_hdrptr();
hdr->receiver_id = receiver_id;
return ibc_send(&c->c);
}
return 0;
}
/*---------------------------------------------------------------------------*/