/**
@brief The macsixlowpanDataRequest function is used to send a frame over
the air to another node. Any node type can call this function.
@param addr Short address of the destination node.
@param len The length of the packet in bytes.
@param data Pointer to the data to be sent.
@param type Type of frame to be sent
*/
static void macDataRequestInt(u16 addr, u8 len, u8 * data, u8 type)
{
u8 rpSent; // Was a routing packet sent?
// Don't send to self
if (addr == macConfig.shortAddress || addr == BROADCASTADDR)
{
return;
}
// This node has no short address
if (!macConfig.associated)
{
return;
}
uint8_t* pFrame = bmm_buffer_alloc();
if(pFrame != NULL)
{
// Create a struct pointer to the global variable...
//ftData *data_frame = (ftData*)(mac_buffer_tx+1);
ftData *data_frame = (ftData*)(((rx_frame_t*)pFrame)->data);
// Build the frame.
data_frame->fcf = FCF_DATA;
data_frame->seq = macConfig.dsn++;
data_frame->panid = macConfig.panId;
data_frame->srcAddr = macConfig.shortAddress;
data_frame->finalDestAddr = addr;
data_frame->originAddr = macConfig.shortAddress;
// send a routing packet if necessary
rpSent = macSendRoutingPacket(addr);
if (NODETYPE == COORD)
{
// Find the child node that can route this packet
u16 child = addr;
u16 parent = macGetParent(child);
while (parent != DEFAULT_COORD_ADDR)
{
child = parent;
parent = macGetParent(child);
}
// send to child node that can route this packet
data_frame->destAddr = child;
}
else
// All data is send to parent, unless this is a wakeup frame
if (type == WAKE_NODE)
data_frame->destAddr = addr;
else
data_frame->destAddr = macConfig.parentShortAddress;
// Frame type is data
if (macConfig.sleeping && NODETYPE == ENDDEVICE && RUMSLEEP)
{
type |= 0x80; // Set high bit of type if we're sleeping
}
data_frame->type = type;
// Copy the payload data to frame. (note: this creates smaller code than using memcpy!!)
u8 i;
for(i=0; i<len; i++){
((u8*)&data_frame->payload)[i] = *data++;
}
// Check addresses again - addr will be different now -> Don't send to self
if (data_frame->destAddr == macConfig.shortAddress || data_frame->destAddr == BROADCASTADDR)
{
bmm_buffer_free(pFrame);
return;
}
((rx_frame_t*)pFrame)->length = len + ftDataHeaderSize; // save length away
if (NODETYPE == COORD)
{
// See if the child is sleeping (only the coord sends directly to a child node)
if (RUMSLEEP && macIsChild(addr) && macIsChildSleeping(addr) && VLP) // Send it later, after child is awake
{
macHoldFrame(addr, pFrame);
// buffer is freed inside macHoldFrame()
}
else // Node is not sleeping child, send it now.
{
event_object_t event;
event.event = MAC_EVENT_SEND;
event.data = pFrame;
event.callback = 0;
// save Event
mac_put_event(&event);
}
}
else
{
event_object_t event;
event.event = MAC_EVENT_SEND;
event.data = pFrame;
event.callback = 0;
// save Event
mac_put_event(&event);
}
macConfig.busy = true;
}
}
/**
The macsixlowpanDataRequest function is used to send a frame over
the air to another node. Any node type can call this function.
param: addr Short address of the destination node.
param: len The length of the packet in bytes.
param: data Pointer to the data to be sent.
param: type Type of frame to be sent
*/
static void
macDataRequestInt(u16 addr, u8 len, u8 * data, u8 type)
{
// Create a struct pointer to the global variable...
ftData *data_frame = (ftData*)(mac_buffer_tx+1);
u8 rpSent; // Was a routing packet sent?
if (addr == macConfig.shortAddress || addr == BROADCASTADDR)
{
// Don't send to self
debugMsgStr("\r\nSelf addressed or Brodcast: nothing sent!");
return;
}
if (!macConfig.associated)
// This node has no short address
return;
#if DEBUG==2
debugMsgStr("\r\nmacDataRequest->");
#endif
// Build the frame.
data_frame->fcf = FCF_DATA;
data_frame->seq = macConfig.dsn++;
data_frame->panid = macConfig.panId;
data_frame->srcAddr = macConfig.shortAddress;
data_frame->finalDestAddr = addr;
data_frame->originAddr = macConfig.shortAddress;
// send a routing packet if necessary
rpSent = macSendRoutingPacket(addr);
#if (NODE_TYPE == COORD)
{
// Find the child node that can route this packet
u16 child = addr;
u16 parent = macGetParent(child);
while (parent != DEFAULT_COORD_ADDR)
{
child = parent;
parent = macGetParent(child);
}
// send to child node that can route this packet
data_frame->destAddr = child;
}
# else
{
// All data is send to parent, unless this is a wakeup frame
if (type == WAKE_NODE)
data_frame->destAddr = addr;
else
data_frame->destAddr = macConfig.parentShortAddress;
}
#endif
// Frame type is data
data_frame->type = type;
// Set high bit of type if we're sleeping
if (macConfig.sleeping && NODE_TYPE == ENDDEVICE && NODE_SLEEP)
data_frame->type |= 0x80; // Indicate that this ENDdevice is sleeping
// Copy the payload data to frame. (note: this creates smaller code than using memcpy!!)
u8 i;
for(i=0; i<len; i++)
((u8*)&data_frame->payload)[i] = *data++;
// Check addresses again - addr will be different now
if (data_frame->destAddr == macConfig.shortAddress ||
data_frame->destAddr == BROADCASTADDR)
// Don't send to self
return;
// send data to radio, after some time delay
*mac_buffer_tx = len + ftDataHeaderSize; // save length away
#if (NODE_TYPE == COORD)
{
// See if the child is sleeping (only the coord sends directly to a child node)
if (NODE_SLEEP && macIsChild(addr) && macIsChildSleeping(addr) )
// Send it later, after child is awake
macHoldFrame(addr, (u8*)data_frame, (u8)*mac_buffer_tx);
else
{
// Node is not sleeping child, send it now.
#if DEBUG==2
debugMsgStr("-- macSetAlarm set");
#endif
macSetAlarm(rpSent ? MAC_RP_DELAY : MAC_DATA_DELAY, mdr_timer);
}
}
# else
macSetAlarm((type==WAKE_NODE || type == DEBUG_FRAME) ? 0 : MAC_DATA_DELAY, mdr_timer);
#endif
macConfig.busy = true;
}