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Added a new module called "framer" that creates MAC level frames to

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the packetbuf from packet attributes. Two framer modules are included,
one that creates 802.15.4 frame headers, and one that creates a
minimal "nullmac"-style header that only contains the link-local
addresses.
This commit is contained in:
adamdunkels 2009-10-19 18:30:03 +00:00
parent bf1920386a
commit 4de1816e36
7 changed files with 488 additions and 0 deletions
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96
core/net/mac/framer-nullmac.c Normal file
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/*
* 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-nullmac.c,v 1.1 2009/10/19 18:30:03 adamdunkels Exp $
*/
/**
* \file
* MAC framer for nullmac
* \author
* Niclas Finne <nfi@sics.se>
* Joakim Eriksson <joakime@sics.se>
*/
#include "net/mac/framer-nullmac.h"
#include "net/rime/packetbuf.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
struct nullmac_hdr {
rimeaddr_t receiver;
rimeaddr_t sender;
};
/*---------------------------------------------------------------------------*/
static int
create(void)
{
struct nullmac_hdr *hdr;
if(packetbuf_hdralloc(sizeof(struct nullmac_hdr))) {
hdr = packetbuf_hdrptr();
rimeaddr_copy(&(hdr->sender), &rimeaddr_node_addr);
rimeaddr_copy(&(hdr->receiver), packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
return sizeof(struct nullmac_hdr);
}
PRINTF("PNULLMAC-UT: too large header: %u\n", len);
return 0;
}
/*---------------------------------------------------------------------------*/
static int
parse(void)
{
struct nullmac_hdr *hdr;
hdr = packetbuf_dataptr();
if(packetbuf_hdrreduce(sizeof(struct nullmac_hdr))) {
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &(hdr->sender));
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, &(hdr->receiver));
PRINTF("PNULLMAC-IN: ");
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
PRINTADDR(packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
PRINTF("%u (%u)\n", packetbuf_datalen(), len);
return sizeof(struct nullmac_hdr);
}
return 0;
}
/*---------------------------------------------------------------------------*/
const struct framer framer_nullmac = {
create, parse
};