nes-proj/core/net/rime/rimebuf.c

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