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6loWPAN: Add some comments, move a function

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This commit is contained in:
Gregory Nutt 2017-03-30 16:30:04 -06:00
parent 2aca4d4ebd
commit 9aabb44118
4 changed files with 61 additions and 45 deletions
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27
include/nuttx/net/sixlowpan.h
View File

@ -333,17 +333,28 @@ struct rimeaddr_s
* 2) i_dsn must be set to a random value. After that, it will be managed
* by the network.
* 3) i_nodeaddr must be set after the MAC is assigned an address.
* 4) On network TX poll operations, the IEEE802.15.4 MAC needs to provide
* the i_frame buffer with size greater than or equal to
* CONFIG_NET_6LOWPAN_FRAMELEN. No dev.d_buf need be provided in this
* case. The entire is TX is performed using only the i_frame buffer.
* 5) On network input RX oprations, both buffers must be provided. The size
* of the i_frame buffer is, again, greater than or equal to
* CONFIG_NET_6LOWPAN_FRAMELEN. The larger dev.d_buf must have a size
* of at least <tbd>. The dev.d_buf is used for de-compressing each
* frame and reassembling any fragmented packets to create the full input
* packet that is provided to the applicatino.
*
* Frame Organization:
*
* Content Offset
* +----------------+ 0
* | Frame Header |
* +----------------+ i_dataoffset
* | Data |
* +----------------+ i_framelen
* | Unused |
* +----------------+ CONFIG_NET_6LOWPAN_FRAMELEN
* Content Offset
* +------------------+ 0
* | Frame Header |
* +------------------+ i_dataoffset
* | Procotol Headers |
* | Data Payload |
* +------------------+ i_framelen
* | Unused |
* +------------------+ CONFIG_NET_6LOWPAN_FRAMELEN
*/
struct ieee802154_driver_s

29
net/sixlowpan/sixlowpan_framer.c
View File

@ -109,35 +109,6 @@ static inline uint8_t sixlowpan_addrlen(uint8_t addrmode)
}
}
/****************************************************************************
* Function: sixlowpan_isbroadcast
*
* Description:
* Return the address length associated with a 2-bit address mode
*
* Input parameters:
* addrmode - The address mode
*
* Returned Value:
* The address length associated with the address mode.
*
****************************************************************************/
static bool sixlowpan_isbroadcast(uint8_t mode, FAR uint8_t *addr)
{
int i = ((mode == FRAME802154_SHORTADDRMODE) ? 2 : 8);
while (i-- > 0)
{
if (addr[i] != 0xff)
{
return false;
}
}
return true;
}
/****************************************************************************
* Function: sixlowpan_addrnull
*

33
net/sixlowpan/sixlowpan_input.c
View File

@ -46,6 +46,39 @@
#ifdef CONFIG_NET_6LOWPAN
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: sixlowpan_isbroadcast
*
* Description:
* Return the address length associated with a 2-bit address mode
*
* Input parameters:
* addrmode - The address mode
*
* Returned Value:
* The address length associated with the address mode.
*
****************************************************************************/
static bool sixlowpan_isbroadcast(uint8_t mode, FAR uint8_t *addr)
{
int i = ((mode == FRAME802154_SHORTADDRMODE) ? 2 : 8);
while (i-- > 0)
{
if (addr[i] != 0xff)
{
return false;
}
}
return true;
}
/****************************************************************************
* Public Functions
****************************************************************************/

17
net/sixlowpan/sixlowpan_utils.c
View File

@ -46,14 +46,15 @@
****************************************************************************/
/* Frame Organization:
*
* Content Offset
* +----------------+ 0
* | Frame Header |
* +----------------+ i_dataoffset
* | Data |
* +----------------+ i_framelen
* | Unused |
* +----------------+ CONFIG_NET_6LOWPAN_FRAMELEN
* Content Offset
* +------------------+ 0
* | Frame Header |
* +------------------+ i_dataoffset
* | Procotol Headers |
* | Data Payload |
* +------------------+ i_framelen
* | Unused |
* +------------------+ CONFIG_NET_6LOWPAN_FRAMELEN
*/
/****************************************************************************