182 lines
6.2 KiB
C
182 lines
6.2 KiB
C
/*
|
|
* Copyright (c) 2009, 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.
|
|
*
|
|
* $Id: framer-802154.c,v 1.3 2010/02/18 21:00:28 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* MAC framer for IEEE 802.15.4
|
|
* \author
|
|
* Niclas Finne <nfi@sics.se>
|
|
* Joakim Eriksson <joakime@sics.se>
|
|
*/
|
|
|
|
#include "net/mac/framer-802154.h"
|
|
#include "net/mac/frame802154.h"
|
|
#include "net/rime/packetbuf.h"
|
|
#include <string.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
|
|
|
|
static uint8_t mac_dsn;
|
|
const static uint16_t mac_dst_pan_id = IEEE802154_PANID;
|
|
const static uint16_t mac_src_pan_id = IEEE802154_PANID;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
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
|
|
create(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 = 1; //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++;
|
|
/* params.seq = packetbuf_attr(PACKETBUF_ATTR_PACKET_ID); */
|
|
|
|
/* 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_addr[0] = 0xFF;
|
|
params.dest_addr[1] = 0xFF;
|
|
|
|
} else {
|
|
rimeaddr_copy((rimeaddr_t *)¶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((rimeaddr_t *)¶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("P6MAC-UT: %2X", params.fcf.frame_type);
|
|
PRINTADDR(params.dest_addr.u8);
|
|
PRINTF("%u %u (%u)\n", len, packetbuf_datalen(), packetbuf_totlen());
|
|
|
|
return len;
|
|
} else {
|
|
PRINTF("P6MAC-UT: too large header: %u\n", len);
|
|
return 0;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
parse(void)
|
|
{
|
|
frame802154_t frame;
|
|
int len;
|
|
len = packetbuf_datalen();
|
|
if(frame802154_parse(packetbuf_dataptr(), len, &frame) &&
|
|
packetbuf_hdrreduce(len - frame.payload_len)) {
|
|
if(frame.fcf.dest_addr_mode) {
|
|
if(frame.dest_pid != mac_src_pan_id &&
|
|
frame.dest_pid != FRAME802154_BROADCASTPANDID) {
|
|
/* Packet to another PAN */
|
|
PRINTF("P6MAC: for another pan %u\n", frame.dest_pid);
|
|
return 0;
|
|
}
|
|
if(!is_broadcast_addr(frame.fcf.dest_addr_mode, frame.dest_addr)) {
|
|
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, (rimeaddr_t *)&frame.dest_addr);
|
|
}
|
|
}
|
|
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, (rimeaddr_t *)&frame.src_addr);
|
|
packetbuf_set_attr(PACKETBUF_ATTR_RELIABLE, frame.fcf.ack_required);
|
|
packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, frame.seq);
|
|
|
|
PRINTF("P6MAC-IN: %2X", frame.fcf.frame_type);
|
|
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
|
|
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
|
|
PRINTF("%u (%u)\n", packetbuf_datalen(), len);
|
|
|
|
return len - frame.payload_len;
|
|
}
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
const struct framer framer_802154 = {
|
|
create, parse
|
|
};
|