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Update README's and some comments.

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Gregory Nutt 2017-04-08 07:30:20 -06:00
parent 60f0186258
commit ee6700dbc7
4 changed files with 53 additions and 9 deletions
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4
Documentation/README.html
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@ -8,7 +8,7 @@
<tr align="center" bgcolor="#e4e4e4">
<td>
<h1><big><font color="#3c34ec"><i>NuttX README Files</i></font></big></h1>
<p>Last Updated: March 23, 2017</p>
<p>Last Updated: April 8, 2017</p>
</td>
</tr>
</table>
@ -362,6 +362,8 @@ nuttx/
| | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/mm/shm/README.txt" target="_blank"><b><i>README.txt</i></b></a>
| `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/mm/README.txt" target="_blank"><b><i>README.txt</i></b></a>
|- net/
| |- sixlowpan/
| | `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/net/sixlowpan/README.txt" target="_blank"><b><i>README.txt</i></b></a>
| `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/net/README.txt" target="_blank"><b><i>README.txt</i></b></a>
|- syscall/
| `- <a href="https://bitbucket.org/nuttx/nuttx/src/master/syscall/README.txt" target="_blank"><b><i>README.txt</i></b></a>

2
README.txt
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@ -1750,6 +1750,8 @@ nuttx/
| | `- README.txt
| `- README.txt
|- net/
| |- sixlowpan
| | `- README.txt
| `- README.txt
|- syscall/
| `- README.txt

26
include/nuttx/net/sixlowpan.h
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@ -376,28 +376,38 @@ struct ieee802154_driver_s
/* i_dgramtag. Datagram tag to be put in the header of the set of
* fragments. It is used by the recipient to match fragments of the
* same payload.
*
* This is the sender's copy of the tag. It is incremented after each
* fragmented packet is sent so that it will be unique to that
* sequence fragmentation. Its value is then persistent, the values of
* other fragmentatin variables are valid on during a single
* fragmentation sequence (while i_accumlen > 0)
*/
uint16_t i_dgramtag;
/* i_reasstag. Each frame in the reassembly has a tag. That tag must
* match the reassembly tag in the fragments being merged.
*
* This is the same tag as i_dgramtag but is saved on the receiving
* side to match all of the fragments of the packet.
*/
uint16_t i_reasstag;
/* i_pktlen. The total length of the IPv6 packet to be re-assembled in
* d_buf.
* d_buf. Used to determine when the re-assembly is complete.
*/
uint16_t i_pktlen;
/* The current accumulated length of the packet being received in d_buf.
* Included IPv6 and protocol headers.
* Included IPv6 and protocol headers. Currently used only to determine
* there is a fragmentation sequence in progress.
*/
uint16_t i_accumlen;
/* i_reasstag. Each frame in the reassembly has a tag. That tag must
* match the reassembly tag in the fragments being merged.
*/
uint16_t i_reasstag;
/* i_boffset. Offset to the beginning of data in d_buf. As each fragment
* is received, data is placed at an appriate offset added to this.
*/

30
net/sixlowpan/README.txt Normal file
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@ -0,0 +1,30 @@
Optimal 6loWPAN Configuration:
1. Link local IP addresses:
128 112 96 80 64 48 32 16
fe80 0000 0000 0000 xxxx xxxx xxxx xxxx
2. MAC-based IP addresses:
128 112 96 80 64 48 32 16
---- ---- ---- ---- ---- ---- ---- ----
xxxx xxxx xxxx xxxx xxxx 00ff fe00 MMMM 2-byte Rime address IEEE 48-bit MAC
fe80 0000 0000 0000 NNNN NNNN NNNN NNNN 8-byte Rime address IEEE EUI-64
Where MMM is the 2-byte rime address XOR 0x0200. For example, the MAC
address of 0xabcd would be 0xa9cd. And NNNN NNNN NNNN NNNN is the 8-byte
rime address address XOR 02000 0000 0000 0000
3. MAC based link-local addresses
128 112 96 80 64 48 32 16
---- ---- ---- ---- ---- ---- ---- ----
fe80 0000 0000 0000 0000 00ff fe00 MMMM 2-byte Rime address IEEE 48-bit MAC
fe80 0000 0000 0000 NNNN NNNN NNNN NNNN 8-byte Rime address IEEE EUI-64
4. Compressable port numbers in the rangs 0xf0b0-0xf0bf
5. IOBs: Must be big enough to hold one IEEE802.15.4 frame (CONFIG_NET_6LOWPAN_FRAMELEN,
typically 127). There must be enough IOBs to decompose the largest IPv6
packet (CONFIG_NET_6LOWPAN_MTU, default 1294, plus per frame overhead).