324 lines
8.8 KiB
C
324 lines
8.8 KiB
C
/**
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* \addtogroup rimebuf
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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: rimebuf.c,v 1.15 2008/04/03 09:07:28 nifi Exp $
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*/
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/**
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* \file
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* Rime buffer (rimebuf) management
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include <string.h>
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#include "contiki-net.h"
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#include "net/rime/rimebuf.h"
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#include "net/rime.h"
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struct rimebuf_attr rimebuf_attrs[RIMEBUF_NUM_ATTRS];
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struct rimebuf_addr rimebuf_addrs[RIMEBUF_NUM_ADDRS];
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const char *rimebuf_attr_strings[] =
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{
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"RIMEBUF_ATTR_NONE",
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"RIMEBUF_ATTR_CHANNEL",
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"RIMEBUF_ATTR_PACKET_ID",
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"RIMEBUF_ATTR_PACKET_TYPE",
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"RIMEBUF_ATTR_EPACKET_ID",
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"RIMEBUF_ATTR_EPACKET_TYPE",
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"RIMEBUF_ATTR_HOPS",
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"RIMEBUF_ATTR_TTL",
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"RIMEBUF_ATTR_REXMIT",
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"RIMEBUF_ATTR_MAX_REXMIT",
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"RIMEBUF_ATTR_NUM_REXMIT",
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"RIMEBUF_ATTR_LINK_QUALITY",
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"RIMEBUF_ATTR_RELIABLE",
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"RIMEBUF_ATTR_ERELIABLE",
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"RIMEBUF_ADDR_SENDER",
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"RIMEBUF_ADDR_RECEIVER",
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"RIMEBUF_ADDR_ESENDER",
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"RIMEBUF_ADDR_ERECEIVER",
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"RIMEBUF_ATTR_MAX",
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};
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static uint16_t buflen, bufptr;
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static uint8_t hdrptr;
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static uint8_t rimebuf[RIMEBUF_SIZE + RIMEBUF_HDR_SIZE];
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static uint8_t *rimebufptr;
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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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void
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rimebuf_clear(void)
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{
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buflen = bufptr = 0;
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hdrptr = RIMEBUF_HDR_SIZE;
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rimebufptr = &rimebuf[RIMEBUF_HDR_SIZE];
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rimebuf_attr_clear();
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}
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/*---------------------------------------------------------------------------*/
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int
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rimebuf_copyfrom(const void *from, uint16_t len)
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{
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uint16_t l;
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rimebuf_clear();
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l = len > RIMEBUF_SIZE? RIMEBUF_SIZE: len;
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memcpy(rimebufptr, from, l);
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buflen = l;
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return l;
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}
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/*---------------------------------------------------------------------------*/
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void
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rimebuf_compact(void)
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{
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int i, len;
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if(rimebuf_is_reference()) {
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memcpy(&rimebuf[RIMEBUF_HDR_SIZE], rimebuf_reference_ptr(),
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rimebuf_datalen());
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} else if (bufptr > 0) {
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len = rimebuf_datalen() + RIMEBUF_HDR_SIZE;
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for (i = RIMEBUF_HDR_SIZE; i < len; i++) {
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rimebuf[i] = rimebuf[bufptr + i];
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}
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bufptr = 0;
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}
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}
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/*---------------------------------------------------------------------------*/
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int
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rimebuf_copyto_hdr(uint8_t *to)
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{
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#if DEBUG_LEVEL > 0
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{
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int i;
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PRINTF("rimebuf_write_hdr: header:\n");
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for(i = hdrptr; i < RIMEBUF_HDR_SIZE; ++i) {
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PRINTF("0x%02x, ", rimebuf[i]);
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}
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PRINTF("\n");
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}
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#endif /* DEBUG_LEVEL */
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memcpy(to, rimebuf + hdrptr, RIMEBUF_HDR_SIZE - hdrptr);
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return RIMEBUF_HDR_SIZE - hdrptr;
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}
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/*---------------------------------------------------------------------------*/
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int
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rimebuf_copyto(void *to)
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{
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#if DEBUG_LEVEL > 0
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{
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int i;
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char buffer[1000];
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char *bufferptr = buffer;
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bufferptr[0] = 0;
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for(i = hdrptr; i < RIMEBUF_HDR_SIZE; ++i) {
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bufferptr += sprintf(bufferptr, "0x%02x, ", rimebuf[i]);
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}
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PRINTF("rimebuf_write: header: %s\n", buffer);
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bufferptr = buffer;
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bufferptr[0] = 0;
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for(i = bufptr; i < buflen + bufptr; ++i) {
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bufferptr += sprintf(bufferptr, "0x%02x, ", rimebufptr[i]);
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}
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PRINTF("rimebuf_write: data: %s\n", buffer);
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}
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#endif /* DEBUG_LEVEL */
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memcpy(to, rimebuf + hdrptr, RIMEBUF_HDR_SIZE - hdrptr);
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memcpy((uint8_t *)to + RIMEBUF_HDR_SIZE - hdrptr, rimebufptr + bufptr,
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buflen);
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return RIMEBUF_HDR_SIZE - hdrptr + buflen;
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}
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/*---------------------------------------------------------------------------*/
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int
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rimebuf_hdralloc(int size)
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{
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if(hdrptr > size) {
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hdrptr -= size;
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return 1;
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}
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hdrptr = 0;
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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int
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rimebuf_hdrreduce(int size)
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{
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if(buflen < size) {
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return 0;
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}
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bufptr += size;
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buflen -= size;
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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void
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rimebuf_set_datalen(uint16_t len)
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{
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PRINTF("rimebuf_set_len: len %d\n", len);
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buflen = len;
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}
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/*---------------------------------------------------------------------------*/
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void *
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rimebuf_dataptr(void)
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{
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return (void *)(&rimebuf[bufptr + RIMEBUF_HDR_SIZE]);
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}
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/*---------------------------------------------------------------------------*/
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void *
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rimebuf_hdrptr(void)
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{
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return (void *)(&rimebuf[hdrptr]);
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}
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/*---------------------------------------------------------------------------*/
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void
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rimebuf_reference(void *ptr, uint16_t len)
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{
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rimebuf_clear();
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rimebufptr = ptr;
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buflen = len;
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}
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/*---------------------------------------------------------------------------*/
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int
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rimebuf_is_reference(void)
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{
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return rimebufptr != &rimebuf[RIMEBUF_HDR_SIZE];
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}
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/*---------------------------------------------------------------------------*/
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void *
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rimebuf_reference_ptr(void)
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{
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return rimebufptr;
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}
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/*---------------------------------------------------------------------------*/
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uint16_t
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rimebuf_datalen(void)
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{
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return buflen;
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}
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/*---------------------------------------------------------------------------*/
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uint8_t
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rimebuf_hdrlen(void)
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{
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return RIMEBUF_HDR_SIZE - hdrptr;
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}
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/*---------------------------------------------------------------------------*/
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uint16_t
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rimebuf_totlen(void)
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{
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return rimebuf_hdrlen() + rimebuf_datalen();
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}
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/*---------------------------------------------------------------------------*/
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void
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rimebuf_attr_clear(void)
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{
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int i;
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for(i = 0; i < RIMEBUF_NUM_ATTRS; ++i) {
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/* rimebuf_attrs[i].type = RIMEBUF_ATTR_NONE; */
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rimebuf_attrs[i].val = 0;
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}
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for(i = 0; i < RIMEBUF_NUM_ADDRS; ++i) {
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/* rimebuf_addrs[i].type = RIMEBUF_ATTR_NONE; */
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rimeaddr_copy(&rimebuf_addrs[i].addr, &rimeaddr_null);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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rimebuf_attr_copyto(struct rimebuf_attr *attrs,
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struct rimebuf_addr *addrs)
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{
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memcpy(attrs, rimebuf_attrs, sizeof(rimebuf_attrs));
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memcpy(addrs, rimebuf_addrs, sizeof(rimebuf_addrs));
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}
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/*---------------------------------------------------------------------------*/
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void
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rimebuf_attr_copyfrom(struct rimebuf_attr *attrs,
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struct rimebuf_addr *addrs)
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{
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memcpy(rimebuf_attrs, attrs, sizeof(rimebuf_attrs));
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memcpy(rimebuf_addrs, addrs, sizeof(rimebuf_addrs));
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}
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/*---------------------------------------------------------------------------*/
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#if !RIMEBUF_CONF_ATTRS_INLINE
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int
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rimebuf_set_attr(uint8_t type, const rimebuf_attr_t val)
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{
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/* rimebuf_attrs[type].type = type; */
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rimebuf_attrs[type].val = val;
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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rimebuf_attr_t
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rimebuf_attr(uint8_t type)
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{
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return rimebuf_attrs[type].val;
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}
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/*---------------------------------------------------------------------------*/
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int
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rimebuf_set_addr(uint8_t type, const rimeaddr_t *addr)
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{
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/* rimebuf_addrs[type - RIMEBUF_ADDR_FIRST].type = type; */
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rimeaddr_copy(&rimebuf_addrs[type - RIMEBUF_ADDR_FIRST].addr, addr);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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const rimeaddr_t *
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rimebuf_addr(uint8_t type)
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{
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return &rimebuf_addrs[type - RIMEBUF_ADDR_FIRST].addr;
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}
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/*---------------------------------------------------------------------------*/
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#endif /* RIMEBUF_CONF_ATTRS_INLINE */
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/** @} */
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