119 lines
4.1 KiB
C
119 lines
4.1 KiB
C
/****************************************************************************
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* ieee802154/common/ieee802154_addrparse.c
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*
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* Copyright (C) 2015 Sebastien Lorquet. All rights reserved.
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* Author: Sebastien Lorquet <sebastien@lorquet.fr>
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* 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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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <nuttx/ieee802154/ieee802154.h>
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#include <apps/ieee802154/ieee802154.h>
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int ieee802154_addrstore(FAR struct ieee802154_packet_s *packet,
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FAR struct ieee802154_addr_s *dest,
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FAR struct ieee802154_addr_s *src)
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{
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int index=3;
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/* encode dest addr */
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if(dest->ia_len == 2)
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{
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memcpy(packet->data+index, &dest->ia_panid, 2);
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index += 2; /* skip dest pan id */
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memcpy(packet->data+index, &dest->ia_saddr, 2);
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index += 2; /* skip dest addr */
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packet->data[1] = (packet->data[1] & ~IEEE802154_FC2_DADDR) | IEEE802154_DADDR_SHORT;
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}
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else if(dest->ia_len == 8)
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{
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memcpy(packet->data+index, &dest->ia_panid, 2);
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index += 2; /* skip dest pan id */
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memcpy(packet->data+index, dest->ia_eaddr, 8);
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index += 8; /* skip dest addr */
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packet->data[1] = (packet->data[1] & ~IEEE802154_FC2_DADDR) | IEEE802154_DADDR_EXT;
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}
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else if(dest->ia_len == 0)
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{
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packet->data[1] = (packet->data[1] & ~IEEE802154_FC2_DADDR) | IEEE802154_DADDR_NONE;
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}
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else
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{
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return -EINVAL;
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}
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/* encode source pan id according to compression */
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if( (dest->ia_len != 0) && (src->ia_len != 0) && (dest->ia_panid == src->ia_panid) )
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{
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packet->data[0] |= IEEE802154_FC1_INTRA;
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}
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else
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{
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memcpy(packet->data+index, &src->ia_panid, 2);
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index += 2; /*skip dest pan id*/
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packet->data[0] &= ~IEEE802154_FC1_INTRA;
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}
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/* encode source addr */
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if(src->ia_len == 2)
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{
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memcpy(packet->data+index, &src->ia_saddr, 2);
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index += 2; /* skip src addr */
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packet->data[1] = (packet->data[1] & ~IEEE802154_FC2_SADDR) | IEEE802154_SADDR_SHORT;
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}
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else if(src->ia_len == 8)
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{
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memcpy(packet->data+index, src->ia_eaddr, 8);
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index += 8; /* skip src addr */
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packet->data[1] = (packet->data[1] & ~IEEE802154_FC2_SADDR) | IEEE802154_SADDR_EXT;
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}
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else if(dest->ia_len == 0)
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{
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packet->data[1] = (packet->data[1] & ~IEEE802154_FC2_SADDR) | IEEE802154_SADDR_NONE;
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}
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else
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{
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return -EINVAL;
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}
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return index;
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}
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