248 lines
7.9 KiB
C
248 lines
7.9 KiB
C
/*
|
|
* Copyright (c) 2008, 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: sicslowmac.c,v 1.1 2009/04/06 13:19:03 nifi Exp $
|
|
*/
|
|
|
|
|
|
/**
|
|
* \file
|
|
* MAC interface for packaging radio packets into 802.15.4 frames
|
|
*
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
* Eric Gnoske <egnoske@gmail.com>
|
|
* Blake Leverett <bleverett@gmail.com>
|
|
* Niclas Finne <nfi@sics.se>
|
|
* Joakim Eriksson <joakime@sics.se>
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include "net/mac/sicslowmac.h"
|
|
#include "net/mac/frame802154.h"
|
|
#include "net/rime/packetbuf.h"
|
|
#include "lib/random.h"
|
|
|
|
#define DEBUG 0
|
|
|
|
#if DEBUG
|
|
#include <stdio.h>
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#define PRINTADDR(addr) PRINTF(" %02x%02x:%02x%02x:%02x%02x:%02x%02x ", ((uint8_t *)addr)[0], ((uint8_t *)addr)[1], ((uint8_t *)addr)[2], ((uint8_t *)addr)[3], ((uint8_t *)addr)[4], ((uint8_t *)addr)[5], ((uint8_t *)addr)[6], ((uint8_t *)addr)[7])
|
|
#else
|
|
#define PRINTF(...)
|
|
#define PRINTADDR(addr)
|
|
#endif
|
|
|
|
/** \brief The sequence number (0x00 - 0xff) added to the transmitted
|
|
* data or MAC command frame. The default is a random value within
|
|
* the range.
|
|
*/
|
|
static uint8_t mac_dsn;
|
|
|
|
/** \brief The 16-bit identifier of the PAN on which the device is
|
|
* sending to. If this value is 0xffff, the device is not
|
|
* associated.
|
|
*/
|
|
static uint16_t mac_dst_pan_id = IEEE802154_PANID;
|
|
|
|
/** \brief The 16-bit identifier of the PAN on which the device is
|
|
* operating. If this value is 0xffff, the device is not
|
|
* associated.
|
|
*/
|
|
static uint16_t mac_src_pan_id = IEEE802154_PANID;
|
|
|
|
static const struct radio_driver *radio;
|
|
static void (* receiver_callback)(const struct mac_driver *);
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
is_broadcast_addr(uint8_t mode, uint8_t *addr)
|
|
{
|
|
int i = mode == FRAME802154_SHORTADDRMODE ? 2 : 8;
|
|
while(i-- > 0) {
|
|
if(addr[i] != 0xff) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
send_packet(void)
|
|
{
|
|
frame802154_t params;
|
|
uint8_t len;
|
|
|
|
/* init to zeros */
|
|
memset(¶ms, 0, sizeof(params));
|
|
|
|
/* Build the FCF. */
|
|
params.fcf.frame_type = FRAME802154_DATAFRAME;
|
|
params.fcf.security_enabled = 0;
|
|
params.fcf.frame_pending = 0;
|
|
params.fcf.ack_required = packetbuf_attr(PACKETBUF_ATTR_RELIABLE);
|
|
params.fcf.panid_compression = 0;
|
|
|
|
/* Insert IEEE 802.15.4 (2003) version bit. */
|
|
params.fcf.frame_version = FRAME802154_IEEE802154_2003;
|
|
|
|
/* Increment and set the data sequence number. */
|
|
params.seq = mac_dsn++;
|
|
|
|
/* Complete the addressing fields. */
|
|
/**
|
|
\todo For phase 1 the addresses are all long. We'll need a mechanism
|
|
in the rime attributes to tell the mac to use long or short for phase 2.
|
|
*/
|
|
params.fcf.src_addr_mode = FRAME802154_LONGADDRMODE;
|
|
params.dest_pid = mac_dst_pan_id;
|
|
|
|
/*
|
|
* If the output address is NULL in the Rime buf, then it is broadcast
|
|
* on the 802.15.4 network.
|
|
*/
|
|
if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_null)) {
|
|
/* Broadcast requires short address mode. */
|
|
params.fcf.dest_addr_mode = FRAME802154_SHORTADDRMODE;
|
|
params.dest_pid = FRAME802154_BROADCASTPANDID;
|
|
params.dest_addr.u8[0] = 0xFF;
|
|
params.dest_addr.u8[1] = 0xFF;
|
|
|
|
} else {
|
|
rimeaddr_copy(¶ms.dest_addr, packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
|
|
params.fcf.dest_addr_mode = FRAME802154_LONGADDRMODE;
|
|
}
|
|
|
|
/* Set the source PAN ID to the global variable. */
|
|
params.src_pid = mac_src_pan_id;
|
|
|
|
/*
|
|
* Set up the source address using only the long address mode for
|
|
* phase 1.
|
|
*/
|
|
rimeaddr_copy(¶ms.src_addr, &rimeaddr_node_addr);
|
|
|
|
params.payload = packetbuf_dataptr();
|
|
params.payload_len = packetbuf_datalen();
|
|
len = frame802154_hdrlen(¶ms);
|
|
if(packetbuf_hdralloc(len)) {
|
|
frame802154_create(¶ms, packetbuf_hdrptr(), len);
|
|
|
|
PRINTF("6MAC-UT: %2X", params.fcf.frame_type);
|
|
PRINTADDR(params.dest_addr.u8);
|
|
PRINTF("%u %u (%u)\n", len, packetbuf_datalen(), packetbuf_totlen());
|
|
|
|
return radio->send(packetbuf_hdrptr(), packetbuf_totlen());
|
|
} else {
|
|
PRINTF("6MAC-UT: too large header: %u\n", len);
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
input_packet(const struct radio_driver *d)
|
|
{
|
|
if(receiver_callback) {
|
|
receiver_callback(&sicslowmac_driver);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
read_packet(void)
|
|
{
|
|
frame802154_t frame;
|
|
int len;
|
|
packetbuf_clear();
|
|
len = radio->read(packetbuf_dataptr(), PACKETBUF_SIZE);
|
|
if(len > 0) {
|
|
packetbuf_set_datalen(len);
|
|
if(frame802154_parse(packetbuf_dataptr(), len, &frame) &&
|
|
packetbuf_hdrreduce(len - frame.payload_len)) {
|
|
if(frame.fcf.dest_addr_mode &&
|
|
!is_broadcast_addr(frame.fcf.dest_addr_mode, frame.dest_addr.u8)) {
|
|
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, &frame.dest_addr);
|
|
}
|
|
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &frame.src_addr);
|
|
|
|
PRINTF("6MAC-IN: %2X", frame.fcf.frame_type);
|
|
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
|
|
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
|
|
PRINTF("%u\n", packetbuf_datalen());
|
|
return packetbuf_datalen();
|
|
} else {
|
|
PRINTF("6MAC: failed to parse hdr\n");
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
set_receive_function(void (* recv)(const struct mac_driver *))
|
|
{
|
|
receiver_callback = recv;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
on(void)
|
|
{
|
|
return radio->on();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
off(int keep_radio_on)
|
|
{
|
|
if(keep_radio_on) {
|
|
return radio->on();
|
|
} else {
|
|
return radio->off();
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
const struct mac_driver sicslowmac_driver = {
|
|
"sicslowmac",
|
|
send_packet,
|
|
read_packet,
|
|
set_receive_function,
|
|
on,
|
|
off,
|
|
};
|
|
/*---------------------------------------------------------------------------*/
|
|
const struct mac_driver *
|
|
sicslowmac_init(const struct radio_driver *d)
|
|
{
|
|
mac_dsn = random_rand() % 256;
|
|
|
|
radio = d;
|
|
radio->set_receive_function(input_packet);
|
|
radio->on();
|
|
return &sicslowmac_driver;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|