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lowpan6.c: move IEEE 802.15.4 definitions to their own header file
This is mainly a preparation to merge the two 6LoWPAN netifs
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goldsimon
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a022590f40
commit
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113
src/include/netif/ieee802154.h
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113
src/include/netif/ieee802154.h
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/**
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* @file
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* Definitions for IEEE 802.15.4 MAC frames
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*/
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/*
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* Copyright (c) 2018 Simon Goldschmidt.
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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 modification,
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* 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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* 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Simon Goldschmidt <goldsimon@gmx.de>
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*
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*/
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#ifndef LWIP_HDR_NETIF_IEEE802154_H
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#define LWIP_HDR_NETIF_IEEE802154_H
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#include "lwip/opt.h"
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/** Helper define for a MAC address, which can be encoded as 0, 2 or 8 bytes */
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struct ieee_802154_addr {
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/* encoded length of the address */
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u8_t addr_len;
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/* address bytes */
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u8_t addr[8];
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};
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/bpstruct.h"
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#endif
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PACK_STRUCT_BEGIN
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/** General MAC frame format
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* This shows the full featured header, mainly for documentation.
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* Some fields are omitted or shortened to achieve frame compression.
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*/
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struct ieee_802154_hdr {
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/** See IEEE_802154_FC_* defines */
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PACK_STRUCT_FIELD(u16_t frame_control);
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/** Sequence number is omitted if IEEE_802154_FC_SEQNO_SUPPR is set in frame_control */
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PACK_STRUCT_FLD_8(u8_t sequence_number);
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/** Destination PAN ID is omitted if Destination Addressing Mode is 0 */
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PACK_STRUCT_FIELD(u16_t destination_pan_id);
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/** Destination Address is omitted if Destination Addressing Mode is 0 */
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PACK_STRUCT_FLD_8(u8_t destination_address[8]);
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/** Source PAN ID is omitted if Source Addressing Mode is 0
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or if IEEE_802154_FC_PANID_COMPR is set in frame control*/
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PACK_STRUCT_FIELD(u16_t source_pan_id);
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/** Source Address is omitted if Source Addressing Mode is 0 */
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PACK_STRUCT_FLD_8(u8_t source_address[8]);
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/* The rest is variable */
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} PACK_STRUCT_STRUCT;
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PACK_STRUCT_END
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#ifdef PACK_STRUCT_USE_INCLUDES
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# include "arch/epstruct.h"
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#endif
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/* Addressing modes (2 bits) */
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#define IEEE_802154_ADDR_MODE_NO_ADDR 0x00 /* PAN ID and address fields are not present */
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#define IEEE_802154_ADDR_MODE_RESERVED 0x01 /* Reserved */
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#define IEEE_802154_ADDR_MODE_SHORT 0x02 /* Address field contains a short address (16 bit) */
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#define IEEE_802154_ADDR_MODE_EXT 0x03 /* Address field contains an extended address (64 bit) */
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/* IEEE 802.15.4 Frame Control definitions (2 bytes; see IEEE 802.15.4-2015 ch. 7.2.1) */
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#define IEEE_802154_FC_FT_MASK 0x0007 /* bits 0..2: Frame Type */
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#define IEEE_802154_FC_FT_BEACON 0x00
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#define IEEE_802154_FC_FT_DATA 0x01
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#define IEEE_802154_FC_FT_ACK 0x02
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#define IEEE_802154_FC_FT_MAC_CMD 0x03
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#define IEEE_802154_FC_FT_RESERVED 0x04
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#define IEEE_802154_FC_FT_MULTIPURPOSE 0x05
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#define IEEE_802154_FC_FT_FRAG 0x06
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#define IEEE_802154_FC_FT_EXT 0x07
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#define IEEE_802154_FC_SEC_EN 0x0008 /* bit 3: Security Enabled */
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#define IEEE_802154_FC_FRAME_PEND 0x1000 /* bit 4: Frame Pending */
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#define IEEE_802154_FC_ACK_REQ 0x2000 /* bit 5: AR (ACK required) */
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#define IEEE_802154_FC_PANID_COMPR 0x4000 /* bit 6: PAN ID Compression (src and dst are equal, src PAN ID omitted) */
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#define IEEE_802154_FC_RESERVED 0x8000
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#define IEEE_802154_FC_SEQNO_SUPPR 0x0100 /* bit 8: Sequence Number Suppression */
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#define IEEE_802154_FC_IE_PRESENT 0x0200 /* bit 9: IE Present */
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#define IEEE_802154_FC_DST_ADDR_MODE_MASK 0x0c00 /* bits 10..11: Destination Addressing Mode */
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#define IEEE_802154_FC_DST_ADDR_MODE_NO_ADDR (IEEE_802154_ADDR_MODE_NO_ADDR << 10)
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#define IEEE_802154_FC_DST_ADDR_MODE_SHORT (IEEE_802154_ADDR_MODE_SHORT << 10)
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#define IEEE_802154_FC_DST_ADDR_MODE_EXT (IEEE_802154_ADDR_MODE_EXT << 10)
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#define IEEE_802154_FC_FRAME_VERSION_MASK 0x3000 /* bits 12..13: Frame Version */
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#define IEEE_802154_FC_FRAME_VERSION_GET(x) (((x) & IEEE_802154_FC_FRAME_VERSION_MASK) >> 12)
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#define IEEE_802154_FC_SRC_ADDR_MODE_MASK 0xc000 /* bits 14..15: Source Addressing Mode */
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#define IEEE_802154_FC_SRC_ADDR_MODE_SHORT (IEEE_802154_ADDR_MODE_SHORT << 14)
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#define IEEE_802154_FC_SRC_ADDR_MODE_EXT (IEEE_802154_ADDR_MODE_EXT << 14)
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#endif /* LWIP_HDR_NETIF_IEEE802154_H */
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@ -61,15 +61,12 @@
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#include "lwip/udp.h"
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#include "lwip/tcpip.h"
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#include "lwip/snmp.h"
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#include "netif/ieee802154.h"
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#include <string.h>
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struct ieee_802154_addr {
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u8_t addr_len;
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u8_t addr[8];
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};
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/** This is a helper struct.
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/** This is a helper struct for reassembly of fragments
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* (IEEE 802.15.4 limits to 127 bytes)
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*/
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struct lowpan6_reass_helper {
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struct pbuf *pbuf;
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@ -1017,6 +1014,7 @@ lowpan6_input(struct pbuf *p, struct netif *netif)
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{
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u8_t *puc;
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s8_t i;
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u16_t frame_control, addr_mode;
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struct ieee_802154_addr src, dest;
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u16_t datagram_size, datagram_offset, datagram_tag;
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struct lowpan6_reass_helper *lrh, *lrh_temp;
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@ -1025,15 +1023,21 @@ lowpan6_input(struct pbuf *p, struct netif *netif)
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/* Analyze header. @todo validate. */
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puc = (u8_t *)p->payload;
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frame_control = puc[0] | (puc[1] << 8);
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datagram_offset = 5;
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if ((puc[1] & 0x0c) == 0x0c) {
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addr_mode = frame_control & IEEE_802154_FC_DST_ADDR_MODE_MASK;
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if (addr_mode == IEEE_802154_FC_DST_ADDR_MODE_EXT) {
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/* extended address (64 bit) */
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dest.addr_len = 8;
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/* reverse memcpy: */
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for (i = 0; i < 8; i++) {
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dest.addr[i] = puc[datagram_offset + 7 - i];
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}
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datagram_offset += 8;
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} else {
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/* short address (16 bit) */
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dest.addr_len = 2;
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/* reverse memcpy: */
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dest.addr[0] = puc[datagram_offset + 1];
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dest.addr[1] = puc[datagram_offset];
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datagram_offset += 2;
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@ -1041,14 +1045,19 @@ lowpan6_input(struct pbuf *p, struct netif *netif)
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datagram_offset += 2; /* skip PAN ID. */
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if ((puc[1] & 0xc0) == 0xc0) {
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addr_mode = frame_control & IEEE_802154_FC_SRC_ADDR_MODE_MASK;
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if (addr_mode == IEEE_802154_FC_SRC_ADDR_MODE_EXT) {
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/* extended address (64 bit) */
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src.addr_len = 8;
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/* reverse memcpy: */
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for (i = 0; i < 8; i++) {
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src.addr[i] = puc[datagram_offset + 7 - i];
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}
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datagram_offset += 8;
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} else {
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/* short address (16 bit) */
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src.addr_len = 2;
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/* reverse memcpy: */
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src.addr[0] = puc[datagram_offset + 1];
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src.addr[1] = puc[datagram_offset];
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datagram_offset += 2;
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