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119 lines
5.6 KiB
C
119 lines
5.6 KiB
C
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Jon Beniston, M7RCE <jon@beniston.com> //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_IEEE_802_15_4_MACFRAME_H
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#define INCLUDE_IEEE_802_15_4_MACFRAME_H
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#include <stdint.h>
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#include <stdio.h>
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// Frame control field values
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#define IEEE_802_15_4_MAC_FRAME_TYPE_MASK 0x0003
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#define IEEE_802_15_4_MAC_BEACON 0x0000
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#define IEEE_802_15_4_MAC_DATA 0x0001
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#define IEEE_802_15_4_MAC_ACK 0x0002
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#define IEEE_802_15_4_MAC_COMMAND 0x0003
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#define IEEE_802_15_4_MAC_SECURITY_ENABLED 0x0008
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#define IEEE_802_15_4_MAC_FRAME_PENDING 0x0010
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#define IEEE_802_15_4_MAC_ACK_REQUIRED 0x0020
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#define IEEE_802_15_4_MAC_PAN_COMPRESSION 0x0040
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#define IEEE_802_15_4_MAC_NO_SEQ_NUMBER 0x0100
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#define IEEE_802_15_4_MAC_DEST_ADDRESS_MASK 0x0c00
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#define IEEE_802_15_4_MAC_DEST_ADDRESS_NONE 0x0000
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#define IEEE_802_15_4_MAC_DEST_ADDRESS_SHORT 0x0400
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#define IEEE_802_15_4_MAC_DEST_ADDRESS_EXT 0x0c00
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#define IEEE_802_15_4_MAC_SOURCE_ADDRESS_MASK 0xc000
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#define IEEE_802_15_4_MAC_SOURCE_ADDRESS_NONE 0x0000
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#define IEEE_802_15_4_MAC_SOURCE_ADDRESS_SHORT 0x4000
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#define IEEE_802_15_4_MAC_SOURCE_ADDRESS_EXT 0xc000
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#define IEEE_802_15_4_MAC_PAYLOAD_MAX_LENGTH 124
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#define IEEE_802_15_5_MAX_EXT_ADDRESS_LENGTH 8
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typedef uint8_t ieee_802_15_4_address[IEEE_802_15_5_MAX_EXT_ADDRESS_LENGTH];
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struct IEEE_802_15_4_MacFrame
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{
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uint16_t m_frameControl;
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uint8_t m_sequenceNumber;
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uint16_t m_destPANID;
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uint16_t m_destShortAddress = 0;
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ieee_802_15_4_address m_destAddress;
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uint16_t m_sourcePANID;
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uint16_t m_sourceShortAddress = 0;
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ieee_802_15_4_address m_sourceAddress;
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uint8_t m_payload[IEEE_802_15_4_MAC_PAYLOAD_MAX_LENGTH];
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uint8_t m_payloadLength;
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IEEE_802_15_4_MacFrame()
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{
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if (false)
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{
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// Example ACK frame
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m_frameControl = IEEE_802_15_4_MAC_ACK;
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m_sequenceNumber = 0;
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m_payloadLength = 0;
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}
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else
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{
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ieee_802_15_4_address dst = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77};
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ieee_802_15_4_address src = {0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
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// Example data frame
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m_frameControl = IEEE_802_15_4_MAC_DATA | IEEE_802_15_4_MAC_DEST_ADDRESS_EXT | IEEE_802_15_4_MAC_SOURCE_ADDRESS_EXT;
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m_sequenceNumber = 0;
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m_destPANID = 0xbabe;
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memcpy(m_destAddress, dst, sizeof(m_destAddress));
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m_sourcePANID = 0xbabe;
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memcpy(m_sourceAddress, src, sizeof(m_sourceAddress));
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strcpy((char *)m_payload, "SDR Angel does 15.4");
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m_payloadLength = strlen((char *)m_payload);
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}
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}
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char *bytesToHex(char *buf, uint8_t *data, int len)
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{
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for (int i = 0; i < len; i++)
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buf += sprintf(buf, "%02x ", data[i]);
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return buf;
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}
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void toHexCharArray(char *buf)
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{
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buf += sprintf(buf, "%02x %02x %02x ", m_frameControl & 0xff, (m_frameControl >> 8) & 0xff, m_sequenceNumber);
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if ((m_frameControl & IEEE_802_15_4_MAC_FRAME_TYPE_MASK) != IEEE_802_15_4_MAC_ACK)
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buf += sprintf(buf, "%02x %02x ", m_destPANID & 0xff, (m_destPANID >> 8) & 0xff);
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if ((m_frameControl & IEEE_802_15_4_MAC_DEST_ADDRESS_MASK) == IEEE_802_15_4_MAC_DEST_ADDRESS_EXT)
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buf = bytesToHex(buf, m_destAddress, sizeof(m_destAddress));
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else if ((m_frameControl & IEEE_802_15_4_MAC_DEST_ADDRESS_MASK) == IEEE_802_15_4_MAC_DEST_ADDRESS_SHORT)
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buf += sprintf(buf, "%02x %02x ", m_destShortAddress & 0xff, (m_destShortAddress >> 8) & 0xff);
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if (((m_frameControl & IEEE_802_15_4_MAC_FRAME_TYPE_MASK) != IEEE_802_15_4_MAC_ACK)
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&& (!(m_frameControl & IEEE_802_15_4_MAC_PAN_COMPRESSION) || (m_destPANID != m_sourcePANID)))
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buf += sprintf(buf, "%02x %02x ", m_sourcePANID & 0xff, (m_sourcePANID >> 8) & 0xff);
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if ((m_frameControl & IEEE_802_15_4_MAC_SOURCE_ADDRESS_MASK) == IEEE_802_15_4_MAC_SOURCE_ADDRESS_EXT)
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buf = bytesToHex(buf, m_sourceAddress, sizeof(m_sourceAddress));
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else if ((m_frameControl & IEEE_802_15_4_MAC_SOURCE_ADDRESS_MASK) == IEEE_802_15_4_MAC_SOURCE_ADDRESS_SHORT)
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buf += sprintf(buf, "%02x %02x ", m_sourceShortAddress & 0xff, (m_sourceShortAddress >> 8) & 0xff);
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buf = bytesToHex(buf, m_payload, m_payloadLength);
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}
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};
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#endif /* INCLUDE_IEEE_802_15_4_MACFRAME_H */
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