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wireless/ieee802154: Merges shard logic for sending data request commands

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This commit is contained in:
Anthony Merlino
2017-06-17 14:56:42 -04:00
parent 74bc930551
commit 30568ee04f
4 changed files with 162 additions and 212 deletions
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wireless/ieee802154/mac802154.c
+133 -2
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@@ -232,6 +232,135 @@ int mac802154_txdesc_alloc(FAR struct ieee802154_privmac_s *priv,
return OK;
}
/****************************************************************************
* Name: mac802154_create_datareq
*
* Description:
* Internal function used by various parts of the MAC layer. This function
* allocates an IOB, populates the frame according to input args, and links
* the IOB into the provided tx descriptor.
*
* Assumptions:
* Called with the MAC locked
*
****************************************************************************/
void mac802154_create_datareq(FAR struct ieee802154_privmac_s *priv,
FAR struct ieee802154_addr_s *coordaddr,
enum ieee802154_addrmode_e srcmode,
FAR struct ieee802154_txdesc_s *txdesc)
{
FAR struct iob_s *iob;
FAR uint16_t *u16;
/* The only node allowed to use a source address of none is the PAN Coordinator.
* PAN coordinators should not be sending data request commans.
*/
DEBUGASSERT(srcmode != IEEE802154_ADDRMODE_NONE);
/* Allocate an IOB to put the frame in */
iob = iob_alloc(false);
DEBUGASSERT(iob != NULL);
iob->io_flink = NULL;
iob->io_len = 0;
iob->io_offset = 0;
iob->io_pktlen = 0;
/* Get a uin16_t reference to the first two bytes. ie frame control field */
u16 = (FAR uint16_t *)&iob->io_data[iob->io_len];
iob->io_len = 2;
*u16 = (IEEE802154_FRAME_COMMAND << IEEE802154_FRAMECTRL_SHIFT_FTYPE);
*u16 |= IEEE802154_FRAMECTRL_ACKREQ;
*u16 |= (coordaddr->mode << IEEE802154_FRAMECTRL_SHIFT_DADDR);
*u16 |= (srcmode << IEEE802154_FRAMECTRL_SHIFT_SADDR);
/* Each time a data or a MAC command frame is generated, the MAC sublayer
* shall copy the value of macDSN into the Sequence Number field of the
* MHR of the outgoing frame and then increment it by one. [1] pg. 40.
*/
iob->io_data[iob->io_len++] = priv->dsn++;
/* If the destination address is present, copy the PAN ID and one of the
* addresses, depending on mode, into the MHR.
*/
if (coordaddr->mode != IEEE802154_ADDRMODE_NONE)
{
memcpy(&iob->io_data[iob->io_len], &coordaddr->panid, 2);
iob->io_len += 2;
if (coordaddr->mode == IEEE802154_ADDRMODE_SHORT)
{
memcpy(&iob->io_data[iob->io_len], &coordaddr->saddr, 2);
iob->io_len += 2;
}
else if (coordaddr->mode == IEEE802154_ADDRMODE_EXTENDED)
{
memcpy(&iob->io_data[iob->io_len], &coordaddr->eaddr,
IEEE802154_EADDR_LEN);
iob->io_len += IEEE802154_EADDR_LEN;
}
}
*u16 |= (coordaddr->mode << IEEE802154_FRAMECTRL_SHIFT_DADDR);
/* If the Destination Addressing Mode field is set to indicate that
* destination addressing information is not present, the PAN ID Compression
* field shall be set to zero and the source PAN identifier shall contain the
* value of macPANId. Otherwise, the PAN ID Compression field shall be set to
* one. In this case and in accordance with the PAN ID Compression field, the
* Destination PAN Identifier field shall contain the value of macPANId, while
* the Source PAN Identifier field shall be omitted. [1] pg. 72
*/
if (coordaddr->mode != IEEE802154_ADDRMODE_NONE &&
coordaddr->panid == priv->addr.panid)
{
*u16 |= IEEE802154_FRAMECTRL_PANIDCOMP;
}
else
{
memcpy(&iob->io_data[iob->io_len], &priv->addr.panid, 2);
iob->io_len += 2;
}
if (srcmode == IEEE802154_ADDRMODE_SHORT)
{
memcpy(&iob->io_data[iob->io_len], &priv->addr.saddr, 2);
iob->io_len += 2;
}
else if (srcmode == IEEE802154_ADDRMODE_EXTENDED)
{
memcpy(&iob->io_data[iob->io_len], &priv->addr.eaddr, IEEE802154_EADDR_LEN);
iob->io_len += IEEE802154_EADDR_LEN;
}
/* Copy in the Command Frame Identifier */
iob->io_data[iob->io_len++] = IEEE802154_CMD_DATA_REQ;
/* Copy the IOB reference to the descriptor */
txdesc->frame = iob;
txdesc->frametype = IEEE802154_FRAME_COMMAND;
/* Save a copy of the destination addressing infromation into the tx descriptor.
* We only do this for commands to help with handling their progession.
*/
memcpy(&txdesc->destaddr, &coordaddr, sizeof(struct ieee802154_addr_s));
/* Copy the IOB reference to the descriptor */
txdesc->frame = iob;
}
/****************************************************************************
* Name: mac802154_setupindirect
*
@@ -810,8 +939,10 @@ static void mac802154_rxframe_worker(FAR void *arg)
* coordinator if beacon tracking was enabled during the Association
* operation.
*
* txdesc = mac802154_assoc_getresp(priv);
* sq_addlast((FAR sq_entry_t *)txdesc, &priv->csma_queue);
* mac802154_txdesc_alloc(priv, &respdec, false);
* mac802154_create_datareq(priv, &req->coordaddr,
* IEEE802154_ADDRMODE_EXTENDED, respdesc);
* sq_addlast((FAR sq_entry_t *)respdesc, &priv->csma_queue);
*/
}
break;