bool MrimMessages::handlePacket(class MrimPacket& packet)
{
switch (packet.msgType()) {
case MRIM_CS_MESSAGE_STATUS:
handleMessageStatus(packet);
break;
case MRIM_CS_MESSAGE_ACK:
handleMessageAck(packet);
break;
case MRIM_CS_OFFLINE_MESSAGE_ACK:
handleOfflineMessageAck(packet);
break;
default:
return false;
}
return true;
}
__interrupt void USCI0RX_ISR(void) {
unsigned int i, checksumHolder;
//Look for delimiter
if (UCA0RXBUF == XBEE_START_DELIMITER) {
//Reset variables
xbeeObject.bufferPosition = 0;
xbeeObject.xbeeFrameType = 0;
xbeeObject.xbeeMessageLength = 0;
xbeeObject.xbeeSenderAddr = 0;
xbeeObject.xbeeSenderNodeAddr = 0;
} //if()
//Check for gibberish (ie. No delimter yet, but we have characters)
if (xbeeObject.bufferPosition == -1) {
return;
} //if()
//Check for a full buffer
if (xbeeObject.bufferPosition == MAX_XBEE_BUFFER_LEN) return;
//Add data to buffer
xbeeObject.bufferSpace[xbeeObject.bufferPosition] = UCA0RXBUF;
xbeeObject.bufferPosition++;
//Pull message length
if (xbeeObject.bufferPosition == 3) {
xbeeObject.xbeeMessageLength = (xbeeObject.bufferSpace[1] << 8) + xbeeObject.bufferSpace[2]; //Frame 1-2: Message Length
} //if()
//Check for end of message & handle it (necessary to prevent data overwrite)
if (xbeeObject.bufferPosition == xbeeObject.xbeeMessageLength + 4) {
//Prevent this message from being read again
xbeeObject.bufferPosition = -1;
//Calculate the checksum
checksumHolder = 0;
for(i=3; i<xbeeObject.xbeeMessageLength + 4; i++) {
checksumHolder += xbeeObject.bufferSpace[i];
checksumHolder &= 0x00FF;
} //for()
//Check for invalid checksum
if (checksumHolder != 0x00FF) return;
xbeeObject.xbeeFrameType = xbeeObject.bufferSpace[3]; //Frame 3: Frame Type
/* CAUTION -- SIGNIFICANT IN-LINE/NON-OPTIMAL CODE FOR NEXT BLOCK OF CODE */
//Handle any configuration messages
if(xbeeObject.xbeeFrameType == AT_CMD_RESPONSE) {
//Filter out response types
if ((xbeeObject.bufferSpace[5] << 8) + xbeeObject.bufferSpace[6] == ATCMD_HP) {
//Response with Preamble ID -- check to see if it's okay
if (xbeeObject.bufferSpace[7] == 0x00) { //status OK
//Okay, now send the next configuration for the Network ID
/* Initialize network information #2 */
sendByte(0x7E);
sendByte(0x00);
sendByte(0x06);
sendByte(0x09);
sendByte(0xB6);
sendByte(0x49);
sendByte(0x44);
sendByte(0x20);
sendByte(0x14);
sendByte(0x7F);
} else {
//Try sending the configuration message again
/* Initialize network information */
sendByte(0x7E);
sendByte(0x00);
sendByte(0x05);
sendByte(0x09);
sendByte(0xB5);
sendByte(0x48);
sendByte(0x50);
sendByte(0x04);
sendByte(0xA5);
} //if-else()
} else if((xbeeObject.bufferSpace[5] << 8) + xbeeObject.bufferSpace[6] == ATCMD_ID) {
//Response with Network ID -- check to see if it's okay
if (xbeeObject.bufferSpace[7] == 0x00) { //status OK
//Okay, now send the write command
sendByte(0x7E);
sendByte(0x00);
sendByte(0x04);
sendByte(0x09);
sendByte(0xB7);
sendByte(0x57);
sendByte(0x52);
sendByte(0x96);
} else {
//Try sending the configuration message again
/* Initialize network information #2 */
sendByte(0x7E);
sendByte(0x00);
sendByte(0x06);
sendByte(0x09);
sendByte(0xB6);
sendByte(0x49);
sendByte(0x44);
sendByte(0x20);
sendByte(0x14);
sendByte(0x7F);
} //if-else()
} else if((xbeeObject.bufferSpace[5] << 8) + xbeeObject.bufferSpace[6] == ATCMD_WR) {
//Response with WR status -- check to see if it's okay
if (xbeeObject.bufferSpace[7] == 0x00) { //status OK
//Okay, now send the apply changes command
sendByte(0x7E);
sendByte(0x00);
sendByte(0x04);
sendByte(0x09);
sendByte(0xB8);
sendByte(0x41);
sendByte(0x43);
sendByte(0xBA);
} else {
//Try sending the write configuration message again
sendByte(0x7E);
sendByte(0x00);
sendByte(0x04);
sendByte(0x09);
sendByte(0xB7);
sendByte(0x57);
sendByte(0x52);
sendByte(0x96);
} //if-else()
} else if((xbeeObject.bufferSpace[5] << 8) + xbeeObject.bufferSpace[6] == ATCMD_AC) {
//Response with AC status -- check to see if it's okay
if (xbeeObject.bufferSpace[7] != 0x00) { //status not OK
//Try sending the apply changes configuration message again
sendByte(0x7E);
sendByte(0x00);
sendByte(0x04);
sendByte(0x09);
sendByte(0xB8);
sendByte(0x41);
sendByte(0x43);
sendByte(0xBA);
} //if-else()
} //if-else()
return;
} else if (xbeeObject.xbeeFrameType != RX_INDICATOR) {
//Not a configuration message and not a typical data message -- exit
return;
} //if-else()
/* END IN-LINE CODING EYE SORE */
//Terminate the buffer (eliminates the checksum from the buffer in the process)
xbeeObject.bufferSpace[xbeeObject.xbeeMessageLength + 3] = '\0';
xbeeObject.xbeeSenderAddr = xbeeObject.bufferSpace[4];
xbeeObject.xbeeSenderAddr <<= 8;
xbeeObject.xbeeSenderAddr += xbeeObject.bufferSpace[5];
xbeeObject.xbeeSenderAddr <<= 8;
xbeeObject.xbeeSenderAddr += xbeeObject.bufferSpace[6];
xbeeObject.xbeeSenderAddr <<= 8;
xbeeObject.xbeeSenderAddr += xbeeObject.bufferSpace[7];
xbeeObject.xbeeSenderAddr <<= 8;
xbeeObject.xbeeSenderAddr += xbeeObject.bufferSpace[8];
xbeeObject.xbeeSenderAddr <<= 8;
xbeeObject.xbeeSenderAddr += xbeeObject.bufferSpace[9];
xbeeObject.xbeeSenderAddr <<= 8;
xbeeObject.xbeeSenderAddr += xbeeObject.bufferSpace[10];
xbeeObject.xbeeSenderAddr <<= 8;
xbeeObject.xbeeSenderAddr += xbeeObject.bufferSpace[11];
#if EXFIL_NODE
//Activate LED
P1OUT ^= BIT0;//Toggle LED
xbeeObject.xbeeSenderNodeAddr = addXbee(xbeeObject.xbeeSenderAddr);
if (xbeeObject.bufferSpace[RX_DATASTART] == NETWORK_NODE_REQ_INT) {
addQueuedNode(xbeeObject.xbeeSenderNodeAddr, NULL);
} else {
//Is this xbee the next in line?
if (!exfilObject.topExfilQueue ||
exfilObject.topExfilQueue->node_number != xbeeObject.xbeeSenderNodeAddr) {
__no_operation();
return;
} //if()
//Is the radio busy?
//if (!isHAMReady()) return;
//If this branch is taken, a node is trying to send its
// message twice.
if (exfilObject.topExfilQueue->message) {
return;
} //if()
//Copy the message into a buffer
exfilObject.topExfilQueue->message = malloc(sizeof(char) * (strlen(&xbeeObject.bufferSpace[15]) + 1) );
strcpy(exfilObject.topExfilQueue->message, &xbeeObject.bufferSpace[15]);
exfilObject.topExfilQueue->status = EXFIL_ACCEPT_ACK;
/*
//Add the message to the radio and reply if successful
if (sendHAMString(exfilObject.topExfilQueue->message, xbeeObject.xbeeSenderNodeAddr)) {
exfilObject.topExfilQueue->status = EXFIL_ACCEPT_ACK_SENT;
} else {
//Not successful, delete it
exfilObject.topExfilQueue->status = EXFIL_FIN;
} //if-else()
*/
} //if()
#else
//Check to make sure this message came from the exfil node
if (xbeeObject.xbeeSenderAddr != EXFIL_XBEE_ADDR) return;
switch(xbeeObject.bufferSpace[RX_DATASTART]) {
case NETWORK_EX_REQ_ACK_INT:
handleMessageReqAck();
break;
case NETWORK_EX_APPROVAL_INT:
handleMessageApproval();
break;
case NETWORK_EX_MSG_ACK_INT:
handleMessageAck();
break;
default: break;
} //switch()
#endif
} //if()
} //USCI0RX_ISR()