345 lines
11 KiB
C
345 lines
11 KiB
C
/*
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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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*/
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/**
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* \file
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* Rime buffer (packetbuf) management
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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/**
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* \addtogroup packetbuf
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* @{
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*/
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#include <string.h>
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#include <net/l2_buf.h>
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#include "contiki-net.h"
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#include "contiki/packetbuf.h"
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#if NETSTACK_CONF_WITH_RIME
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#include "net/rime/rime.h"
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#endif
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#if 0
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/* Moved to l2_buf.h */
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struct packetbuf_attr packetbuf_attrs[PACKETBUF_NUM_ATTRS];
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struct packetbuf_addr packetbuf_addrs[PACKETBUF_NUM_ADDRS];
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static uint16_t buflen, bufptr;
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static uint8_t hdrptr;
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/* The declarations below ensure that the packet buffer is aligned on
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an even 32-bit boundary. On some platforms (most notably the
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msp430 or OpenRISC), having a potentially misaligned packet buffer may lead to
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problems when accessing words. */
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static uint32_t packetbuf_aligned[(PACKETBUF_SIZE + PACKETBUF_HDR_SIZE + 3) / 4];
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static uint8_t *packetbuf = (uint8_t *)packetbuf_aligned;
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static uint8_t *packetbufptr;
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#endif
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#define DEBUG 0
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#define DEBUG_LEVEL DEBUG
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//#define DEBUG DEBUG_NONE
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#include "contiki/ip/uip-debug.h"
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#if UIP_LOGGING
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#include <stdio.h>
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void uip_log(char *msg);
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#define UIP_LOG(m) uip_log(m)
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#else
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#define UIP_LOG(m)
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#endif
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_clear(struct net_buf *buf)
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{
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uip_pkt_buflen(buf) = uip_pkt_bufptr(buf) = 0;
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uip_pkt_hdrptr(buf) = PACKETBUF_HDR_SIZE;
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uip_pkt_packetbufptr(buf) = &uip_pkt_packetbuf(buf)[PACKETBUF_HDR_SIZE];
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packetbuf_attr_clear(buf);
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_clear_hdr(struct net_buf *buf)
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{
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uip_pkt_hdrptr(buf) = PACKETBUF_HDR_SIZE;
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}
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/*---------------------------------------------------------------------------*/
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int
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packetbuf_copyfrom(struct net_buf *buf, const void *from, uint16_t len)
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{
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uint16_t l;
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packetbuf_clear(buf);
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l = len > PACKETBUF_SIZE? PACKETBUF_SIZE: len;
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memcpy(uip_pkt_packetbufptr(buf), from, l);
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uip_pkt_buflen(buf) = l;
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return l;
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_compact(struct net_buf *buf)
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{
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int i, len;
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if(packetbuf_is_reference(buf)) {
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memcpy(&uip_pkt_packetbuf(buf)[PACKETBUF_HDR_SIZE], packetbuf_reference_ptr(buf),
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packetbuf_datalen(buf));
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} else if(uip_pkt_bufptr(buf) > 0) {
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len = packetbuf_datalen(buf) + PACKETBUF_HDR_SIZE;
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for(i = PACKETBUF_HDR_SIZE; i < len; i++) {
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uip_pkt_packetbuf(buf)[i] = uip_pkt_packetbuf(buf)[uip_pkt_bufptr(buf) + i];
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}
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uip_pkt_bufptr(buf) = 0;
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}
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}
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/*---------------------------------------------------------------------------*/
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int
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packetbuf_copyto_hdr(struct net_buf *buf, 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("packetbuf %p\n", uip_pkt_packetbuf(buf));
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PRINTF("packetbuf_write_hdr: header (from %p, %d bytes):\n", uip_pkt_hdrptr(buf), PACKETBUF_HDR_SIZE);
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for(i = uip_pkt_hdrptr(buf); i < PACKETBUF_HDR_SIZE; ++i) {
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PRINTF("0x%02x, ", uip_pkt_packetbuf(buf)[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, uip_pkt_packetbuf(buf) + uip_pkt_hdrptr(buf), PACKETBUF_HDR_SIZE - uip_pkt_hdrptr(buf));
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return PACKETBUF_HDR_SIZE - uip_pkt_hdrptr(buf);
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}
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/*---------------------------------------------------------------------------*/
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int
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packetbuf_copyto(struct net_buf *buf, 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 = uip_pkt_hdrptr(buf); i < PACKETBUF_HDR_SIZE; ++i) {
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bufferptr += sprintf(bufferptr, "0x%02x, ", uip_pkt_packetbuf(buf)[i]);
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}
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PRINTF("packetbuf_write: header: %s\n", buffer);
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bufferptr = buffer;
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bufferptr[0] = 0;
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for(i = uip_pkt_bufptr(buf); i < uip_pkt_buflen(buf) + uip_pkt_bufptr(buf); ++i) {
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bufferptr += sprintf(bufferptr, "0x%02x, ", uip_pkt_packetbufptr(buf)[i]);
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}
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PRINTF("packetbuf_write: data: %s\n", buffer);
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}
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#endif /* DEBUG_LEVEL */
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if(PACKETBUF_HDR_SIZE - uip_pkt_hdrptr(buf) + uip_pkt_buflen(buf) > PACKETBUF_SIZE) {
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/* Too large packet */
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return 0;
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}
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memcpy(to, uip_pkt_packetbuf(buf) + uip_pkt_hdrptr(buf), PACKETBUF_HDR_SIZE - uip_pkt_hdrptr(buf));
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memcpy((uint8_t *)to + PACKETBUF_HDR_SIZE - uip_pkt_hdrptr(buf), uip_pkt_packetbufptr(buf) + uip_pkt_bufptr(buf),
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uip_pkt_buflen(buf));
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return PACKETBUF_HDR_SIZE - uip_pkt_hdrptr(buf) + uip_pkt_buflen(buf);
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}
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/*---------------------------------------------------------------------------*/
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int
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packetbuf_hdralloc(struct net_buf *buf, int size)
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{
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if(uip_pkt_hdrptr(buf) >= size && packetbuf_totlen(buf) + size <= PACKETBUF_SIZE) {
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uip_pkt_hdrptr(buf) -= size;
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return 1;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_hdr_remove(struct net_buf *buf, int size)
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{
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uip_pkt_hdrptr(buf) += size;
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}
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/*---------------------------------------------------------------------------*/
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int
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packetbuf_hdrreduce(struct net_buf *buf, int size)
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{
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if(uip_pkt_buflen(buf) < size) {
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return 0;
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}
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uip_pkt_bufptr(buf) += size;
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uip_pkt_buflen(buf) -= size;
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_set_datalen(struct net_buf *buf, uint16_t len)
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{
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PRINTF("packetbuf_set_len: len %d\n", len);
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uip_pkt_buflen(buf) = len;
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}
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/*---------------------------------------------------------------------------*/
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void *
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packetbuf_dataptr(struct net_buf *buf)
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{
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return (void *)(&uip_pkt_packetbuf(buf)[uip_pkt_bufptr(buf) + PACKETBUF_HDR_SIZE]);
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}
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/*---------------------------------------------------------------------------*/
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void *
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packetbuf_hdrptr(struct net_buf *buf)
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{
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return (void *)(&uip_pkt_packetbuf(buf)[uip_pkt_hdrptr(buf)]);
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_reference(struct net_buf *buf, void *ptr, uint16_t len)
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{
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packetbuf_clear(buf);
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uip_pkt_packetbufptr(buf) = ptr;
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uip_pkt_buflen(buf) = len;
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}
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/*---------------------------------------------------------------------------*/
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int
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packetbuf_is_reference(struct net_buf *buf)
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{
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return uip_pkt_packetbufptr(buf) != &uip_pkt_packetbuf(buf)[PACKETBUF_HDR_SIZE];
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}
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/*---------------------------------------------------------------------------*/
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void *
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packetbuf_reference_ptr(struct net_buf *buf)
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{
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return uip_pkt_packetbufptr(buf);
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}
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/*---------------------------------------------------------------------------*/
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uint16_t
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packetbuf_datalen(struct net_buf *buf)
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{
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return uip_pkt_buflen(buf);
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}
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/*---------------------------------------------------------------------------*/
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uint8_t
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packetbuf_hdrlen(struct net_buf *buf)
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{
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uint8_t hdrlen;
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hdrlen = PACKETBUF_HDR_SIZE - uip_pkt_hdrptr(buf);
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if(hdrlen) {
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/* outbound packet */
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return hdrlen;
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} else {
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/* inbound packet */
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return uip_pkt_bufptr(buf);
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}
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}
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/*---------------------------------------------------------------------------*/
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uint16_t
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packetbuf_totlen(struct net_buf *buf)
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{
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return packetbuf_hdrlen(buf) + packetbuf_datalen(buf);
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_attr_clear(struct net_buf *buf)
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{
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int i;
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for(i = 0; i < PACKETBUF_NUM_ATTRS; ++i) {
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uip_pkt_packetbuf_attrs(buf)[i].val = 0;
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}
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for(i = 0; i < PACKETBUF_NUM_ADDRS; ++i) {
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linkaddr_copy(&uip_pkt_packetbuf_addrs(buf)[i].addr, &linkaddr_null);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_attr_copyto(struct net_buf *buf, struct packetbuf_attr *attrs,
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struct packetbuf_addr *addrs)
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{
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memcpy(attrs, uip_pkt_packetbuf_attrs(buf), sizeof(uip_pkt_packetbuf_attrs(buf)));
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memcpy(addrs, uip_pkt_packetbuf_addrs(buf), sizeof(uip_pkt_packetbuf_addrs(buf)));
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}
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/*---------------------------------------------------------------------------*/
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void
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packetbuf_attr_copyfrom(struct net_buf *buf, struct packetbuf_attr *attrs,
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struct packetbuf_addr *addrs)
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{
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memcpy(uip_pkt_packetbuf_attrs(buf), attrs, sizeof(uip_pkt_packetbuf_attrs(buf)));
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memcpy(uip_pkt_packetbuf_addrs(buf), addrs, sizeof(uip_pkt_packetbuf_addrs(buf)));
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}
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/*---------------------------------------------------------------------------*/
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#if !PACKETBUF_CONF_ATTRS_INLINE
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int
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packetbuf_set_attr(struct net_buf *buf, uint8_t type, const packetbuf_attr_t val)
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{
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/* uip_pkt_packetbuf_attrs(buf)[type].type = type; */
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uip_pkt_packetbuf_attrs(buf)[type].val = val;
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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packetbuf_attr_t
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packetbuf_attr(struct net_buf *buf, uint8_t type)
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{
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return uip_pkt_packetbuf_attrs(buf)[type].val;
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}
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/*---------------------------------------------------------------------------*/
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int
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packetbuf_set_addr(struct net_buf *buf, uint8_t type, const linkaddr_t *addr)
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{
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/* uip_pkt_packetbuf_addrs(buf)[type - PACKETBUF_ADDR_FIRST].type = type; */
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linkaddr_copy(&uip_pkt_packetbuf_addrs(buf)[type - PACKETBUF_ADDR_FIRST].addr, addr);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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const linkaddr_t *
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packetbuf_addr(struct net_buf *buf, uint8_t type)
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{
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return &uip_pkt_packetbuf_addrs(buf)[type - PACKETBUF_ADDR_FIRST].addr;
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}
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/*---------------------------------------------------------------------------*/
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#endif /* PACKETBUF_CONF_ATTRS_INLINE */
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int
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packetbuf_holds_broadcast(struct net_buf *buf)
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{
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return linkaddr_cmp(&uip_pkt_packetbuf_addrs(buf)[PACKETBUF_ADDR_RECEIVER - PACKETBUF_ADDR_FIRST].addr, &linkaddr_null);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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