140 lines
5.0 KiB
C
Executable File
140 lines
5.0 KiB
C
Executable File
/**
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* \file nwkFrame.c
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*
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* \brief Frame buffers management implementation
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*
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* Copyright (C) 2012-2014, Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. This software may only be redistributed and used in connection with an
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* Atmel microcontroller product.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* \asf_license_stop
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*
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* Modification and other use of this code is subject to Atmel's Limited
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* License Agreement (license.txt).
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*
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* $Id: nwkFrame.c 9267 2014-03-18 21:46:19Z ataradov $
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*
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*/
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/*- Includes ---------------------------------------------------------------*/
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include "sysConfig.h"
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#include "nwk.h"
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#include "nwkFrame.h"
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/*- Types ------------------------------------------------------------------*/
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enum
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{
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NWK_FRAME_STATE_FREE = 0x00,
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};
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/*- Variables --------------------------------------------------------------*/
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static NwkFrame_t nwkFrameFrames[NWK_BUFFERS_AMOUNT];
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/*- Implementations --------------------------------------------------------*/
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/*************************************************************************//**
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@brief Initializes the Frame module
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*****************************************************************************/
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void nwkFrameInit(void)
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{
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for (uint8_t i = 0; i < NWK_BUFFERS_AMOUNT; i++)
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nwkFrameFrames[i].state = NWK_FRAME_STATE_FREE;
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}
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/*************************************************************************//**
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@brief Allocates an empty frame from the buffer pool
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@return Pointer to the frame or @c NULL if there are no free frames
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*****************************************************************************/
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NwkFrame_t *nwkFrameAlloc(void)
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{
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for (uint8_t i = 0; i < NWK_BUFFERS_AMOUNT; i++)
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{
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if (NWK_FRAME_STATE_FREE == nwkFrameFrames[i].state)
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{
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memset(&nwkFrameFrames[i], 0, sizeof(NwkFrame_t));
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nwkFrameFrames[i].size = sizeof(NwkFrameHeader_t);
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nwkFrameFrames[i].payload = nwkFrameFrames[i].data + sizeof(NwkFrameHeader_t);
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nwkIb.lock++;
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return &nwkFrameFrames[i];
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}
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}
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return NULL;
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}
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/*************************************************************************//**
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@brief Frees a @a frame and returns it to the buffer pool
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@param[in] frame Pointer to the frame to be freed
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*****************************************************************************/
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void nwkFrameFree(NwkFrame_t *frame)
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{
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frame->state = NWK_FRAME_STATE_FREE;
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nwkIb.lock--;
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}
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/*************************************************************************//**
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@brief Cycles through the allocated frames starting from the specified @a frame
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@param[in] frame Pointer to the current frame or @c NULL for the first frame
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@return Next allocated frame or @c NULL if there are no more frames
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*****************************************************************************/
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NwkFrame_t *nwkFrameNext(NwkFrame_t *frame)
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{
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if (NULL == frame)
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frame = nwkFrameFrames;
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else
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frame++;
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for (; frame < &nwkFrameFrames[NWK_BUFFERS_AMOUNT]; frame++)
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{
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if (NWK_FRAME_STATE_FREE != frame->state)
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return frame;
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}
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return NULL;
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}
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/*************************************************************************//**
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@brief Sets default parameters for the the command @a frame
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@param[in] frame Pointer to the command frame
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*****************************************************************************/
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void nwkFrameCommandInit(NwkFrame_t *frame)
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{
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frame->tx.status = NWK_SUCCESS_STATUS;
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frame->header.nwkSeq = ++nwkIb.nwkSeqNum;
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frame->header.nwkSrcAddr = nwkIb.addr;
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#ifdef NWK_ENABLE_SECURE_COMMANDS
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frame->header.nwkFcf.security = 1;
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#endif
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}
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