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HCI.cpp
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/*
This file is part of the ArduinoBLE library.
Copyright (c) 2018 Arduino SA. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "ATT.h"
#include "GAP.h"
#include "HCITransport.h"
#include "L2CAPSignaling.h"
#include "btct.h"
#include "HCI.h"
#include "bitDescriptions.h"
// #define _BLE_TRACE_
#define HCI_COMMAND_PKT 0x01
#define HCI_ACLDATA_PKT 0x02
#define HCI_EVENT_PKT 0x04
#define HCI_SECURITY_PKT 0x06
#define EVT_DISCONN_COMPLETE 0x05
#define EVT_ENCRYPTION_CHANGE 0x08
#define EVT_CMD_COMPLETE 0x0e
#define EVT_CMD_STATUS 0x0f
#define EVT_NUM_COMP_PKTS 0x13
#define EVT_RETURN_LINK_KEYS 0x15
#define EVT_UNKNOWN 0x10
#define EVT_LE_META_EVENT 0x3e
#define EVT_LE_CONN_COMPLETE 0x01
#define EVT_LE_ADVERTISING_REPORT 0x02
// OGF_LINK_CTL
#define OCF_DISCONNECT 0x0006
// OGF_HOST_CTL
#define OCF_SET_EVENT_MASK 0x0001
#define OCF_RESET 0x0003
// OGF_INFO_PARAM
#define OCF_READ_LOCAL_VERSION 0x0001
#define OCF_READ_BD_ADDR 0x0009
// OGF_STATUS_PARAM
#define OCF_READ_RSSI 0x0005
// OGF_LE_CTL
#define OCF_LE_READ_BUFFER_SIZE 0x0002
#define OCF_LE_SET_RANDOM_ADDRESS 0x0005
#define OCF_LE_SET_ADVERTISING_PARAMETERS 0x0006
#define OCF_LE_SET_ADVERTISING_DATA 0x0008
#define OCF_LE_SET_SCAN_RESPONSE_DATA 0x0009
#define OCF_LE_SET_ADVERTISE_ENABLE 0x000a
#define OCF_LE_SET_SCAN_PARAMETERS 0x000b
#define OCF_LE_SET_SCAN_ENABLE 0x000c
#define OCF_LE_CREATE_CONN 0x000d
#define OCF_LE_CANCEL_CONN 0x000e
#define OCF_LE_CONN_UPDATE 0x0013
#define HCI_OE_USER_ENDED_CONNECTION 0x13
String metaEventToString(LE_META_EVENT event)
{
switch(event){
case CONN_COMPLETE: return F("CONN_COMPLETE");
case ADVERTISING_REPORT: return F("ADVERTISING_REPORT");
case LONG_TERM_KEY_REQUEST: return F("LE_LONG_TERM_KEY_REQUEST");
case READ_LOCAL_P256_COMPLETE: return F("READ_LOCAL_P256_COMPLETE");
case GENERATE_DH_KEY_COMPLETE: return F("GENERATE_DH_KEY_COMPLETE");
default: return "event unknown";
}
}
String commandToString(LE_COMMAND command){
switch (command)
{
case ENCRYPT: return F("ENCRYPT");
case LONG_TERM_KEY_REPLY: return F("LONG_TERM_KEY_REPLY");
case READ_LOCAL_P256: return F("READ_LOCAL_P256");
case GENERATE_DH_KEY_V1: return F("GENERATE_DH_KEY_V1");
case GENERATE_DH_KEY_V2: return F("GENERATE_DH_KEY_V2");
default: return "UNKNOWN";
}
}
HCIClass::HCIClass() :
_debug(NULL),
_recvIndex(0),
_pendingPkt(0)
{
}
HCIClass::~HCIClass()
{
}
int HCIClass::begin()
{
_recvIndex = 0;
return HCITransport.begin();
}
void HCIClass::end()
{
HCITransport.end();
}
void HCIClass::poll()
{
poll(0);
}
void HCIClass::poll(unsigned long timeout)
{
#ifdef ARDUINO_AVR_UNO_WIFI_REV2
digitalWrite(NINA_RTS, LOW);
#endif
if (timeout) {
HCITransport.wait(timeout);
}
while (HCITransport.available()) {
byte b = HCITransport.read();
if (_recvIndex >= sizeof(_recvBuffer)) {
_recvIndex = 0;
if (_debug) {
_debug->println("_recvBuffer overflow");
}
}
_recvBuffer[_recvIndex++] = b;
if (_recvBuffer[0] == HCI_ACLDATA_PKT) {
if (_recvIndex > 5 && _recvIndex >= (5 + (_recvBuffer[3] + (_recvBuffer[4] << 8)))) {
if (_debug) {
dumpPkt("HCI ACLDATA RX <- ", _recvIndex, _recvBuffer);
}
#ifdef ARDUINO_AVR_UNO_WIFI_REV2
digitalWrite(NINA_RTS, HIGH);
#endif
int pktLen = _recvIndex - 1;
_recvIndex = 0;
handleAclDataPkt(pktLen, &_recvBuffer[1]);
#ifdef ARDUINO_AVR_UNO_WIFI_REV2
digitalWrite(NINA_RTS, LOW);
#endif
}
} else if (_recvBuffer[0] == HCI_EVENT_PKT) {
if (_recvIndex > 3 && _recvIndex >= (3 + _recvBuffer[2])) {
if (_debug) {
dumpPkt("HCI EVENT RX <- ", _recvIndex, _recvBuffer);
}
#ifdef ARDUINO_AVR_UNO_WIFI_REV2
digitalWrite(NINA_RTS, HIGH);
#endif
// received full event
int pktLen = _recvIndex - 1;
_recvIndex = 0;
handleEventPkt(pktLen, &_recvBuffer[1]);
#ifdef ARDUINO_AVR_UNO_WIFI_REV2
digitalWrite(NINA_RTS, LOW);
#endif
}
} else {
_recvIndex = 0;
if (_debug) {
_debug->println(b, HEX);
}
}
}
#ifdef ARDUINO_AVR_UNO_WIFI_REV2
digitalWrite(NINA_RTS, HIGH);
#endif
}
int HCIClass::reset()
{
return sendCommand(OGF_HOST_CTL << 10 | OCF_RESET);
}
int HCIClass::readLocalVersion(uint8_t& hciVer, uint16_t& hciRev, uint8_t& lmpVer, uint16_t& manufacturer, uint16_t& lmpSubVer)
{
int result = sendCommand(OGF_INFO_PARAM << 10 | OCF_READ_LOCAL_VERSION);
if (result == 0) {
struct __attribute__ ((packed)) HCILocalVersion {
uint8_t hciVer;
uint16_t hciRev;
uint8_t lmpVer;
uint16_t manufacturer;
uint16_t lmpSubVer;
} *localVersion = (HCILocalVersion*)_cmdResponse;
hciVer = localVersion->hciVer;
hciRev = localVersion->hciRev;
lmpVer = localVersion->lmpVer;
manufacturer = localVersion->manufacturer;
lmpSubVer = localVersion->lmpSubVer;
}
return result;
}
int HCIClass::readBdAddr(uint8_t addr[6])
{
int result = sendCommand(OGF_INFO_PARAM << 10 | OCF_READ_BD_ADDR);
if (result == 0) {
memcpy(addr, _cmdResponse, 6);
}
return result;
}
int HCIClass::readBdAddr(){
uint8_t response[6];
int result = readBdAddr(response);
if(result==0){
for(int i=0; i<6; i++){
localAddr[5-i] = _cmdResponse[i];
}
}
return result;
}
int HCIClass::readRssi(uint16_t handle)
{
int result = sendCommand(OGF_STATUS_PARAM << 10 | OCF_READ_RSSI, sizeof(handle), &handle);
int rssi = 127;
if (result == 0) {
struct __attribute__ ((packed)) HCIReadRssi {
uint16_t handle;
int8_t rssi;
} *readRssi = (HCIReadRssi*)_cmdResponse;
if (readRssi->handle == handle) {
rssi = readRssi->rssi;
}
}
return rssi;
}
int HCIClass::setEventMask(uint64_t eventMask)
{
return sendCommand(OGF_HOST_CTL << 10 | OCF_SET_EVENT_MASK, sizeof(eventMask), &eventMask);
}
// Set LE Event mask
int HCIClass::setLeEventMask(uint64_t leEventMask)
{
return sendCommand(OGF_LE_CTL << 10 | 0x01, sizeof(leEventMask), &leEventMask);
}
int HCIClass::readLeBufferSize(uint16_t& pktLen, uint8_t& maxPkt)
{
int result = sendCommand(OGF_LE_CTL << 10 | OCF_LE_READ_BUFFER_SIZE);
if (result == 0) {
struct __attribute__ ((packed)) HCILeBufferSize {
uint16_t pktLen;
uint8_t maxPkt;
} *leBufferSize = (HCILeBufferSize*)_cmdResponse;
pktLen = leBufferSize->pktLen;
_maxPkt = maxPkt = leBufferSize->maxPkt;
#ifndef __AVR__
ATT.setMaxMtu(pktLen - 9); // max pkt len - ACL header size
#endif
}
return result;
}
int HCIClass::leSetRandomAddress(uint8_t addr[6])
{
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_SET_RANDOM_ADDRESS, 6, addr);
}
int HCIClass::leSetAdvertisingParameters(uint16_t minInterval, uint16_t maxInterval,
uint8_t advType, uint8_t ownBdaddrType,
uint8_t directBdaddrType, uint8_t directBdaddr[6],
uint8_t chanMap,
uint8_t filter)
{
struct __attribute__ ((packed)) HCILeAdvertisingParameters {
uint16_t minInterval;
uint16_t maxInterval;
uint8_t advType;
uint8_t ownBdaddrType;
uint8_t directBdaddrType;
uint8_t directBdaddr[6];
uint8_t chanMap;
uint8_t filter;
} leAdvertisingParamters;
leAdvertisingParamters.minInterval = minInterval;
leAdvertisingParamters.maxInterval = maxInterval;
leAdvertisingParamters.advType = advType;
leAdvertisingParamters.ownBdaddrType = ownBdaddrType;
leAdvertisingParamters.directBdaddrType = directBdaddrType;
memcpy(leAdvertisingParamters.directBdaddr, directBdaddr, 6);
leAdvertisingParamters.chanMap = chanMap;
leAdvertisingParamters.filter = filter;
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_SET_ADVERTISING_PARAMETERS, sizeof(leAdvertisingParamters), &leAdvertisingParamters);
}
int HCIClass::leSetAdvertisingData(uint8_t length, uint8_t data[])
{
struct __attribute__ ((packed)) HCILeAdvertisingData {
uint8_t length;
uint8_t data[31];
} leAdvertisingData;
memset(&leAdvertisingData, 0, sizeof(leAdvertisingData));
leAdvertisingData.length = length;
memcpy(leAdvertisingData.data, data, length);
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_SET_ADVERTISING_DATA, sizeof(leAdvertisingData), &leAdvertisingData);
}
int HCIClass::leSetScanResponseData(uint8_t length, uint8_t data[])
{
struct __attribute__ ((packed)) HCILeScanResponseData {
uint8_t length;
uint8_t data[31];
} leScanResponseData;
memset(&leScanResponseData, 0, sizeof(leScanResponseData));
leScanResponseData.length = length;
memcpy(leScanResponseData.data, data, length);
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_SET_SCAN_RESPONSE_DATA, sizeof(leScanResponseData), &leScanResponseData);
}
int HCIClass::leSetAdvertiseEnable(uint8_t enable)
{
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_SET_ADVERTISE_ENABLE, sizeof(enable), &enable);
}
int HCIClass::leSetScanParameters(uint8_t type, uint16_t interval, uint16_t window,
uint8_t ownBdaddrType, uint8_t filter)
{
struct __attribute__ ((packed)) HCILeSetScanParameters {
uint8_t type;
uint16_t interval;
uint16_t window;
uint8_t ownBdaddrType;
uint8_t filter;
} leScanParameters;
leScanParameters.type = type;
leScanParameters.interval = interval;
leScanParameters.window = window;
leScanParameters.ownBdaddrType = ownBdaddrType;
leScanParameters.filter = filter;
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_SET_SCAN_PARAMETERS, sizeof(leScanParameters), &leScanParameters);
}
int HCIClass::leSetScanEnable(uint8_t enabled, uint8_t duplicates)
{
struct __attribute__ ((packed)) HCILeSetScanEnableData {
uint8_t enabled;
uint8_t duplicates;
} leScanEnableData;
leScanEnableData.enabled = enabled;
leScanEnableData.duplicates = duplicates;
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_SET_SCAN_ENABLE, sizeof(leScanEnableData), &leScanEnableData);
}
int HCIClass::leCreateConn(uint16_t interval, uint16_t window, uint8_t initiatorFilter,
uint8_t peerBdaddrType, uint8_t peerBdaddr[6], uint8_t ownBdaddrType,
uint16_t minInterval, uint16_t maxInterval, uint16_t latency,
uint16_t supervisionTimeout, uint16_t minCeLength, uint16_t maxCeLength)
{
struct __attribute__ ((packed)) HCILeCreateConnData {
uint16_t interval;
uint16_t window;
uint8_t initiatorFilter;
uint8_t peerBdaddrType;
uint8_t peerBdaddr[6];
uint8_t ownBdaddrType;
uint16_t minInterval;
uint16_t maxInterval;
uint16_t latency;
uint16_t supervisionTimeout;
uint16_t minCeLength;
uint16_t maxCeLength;
} leCreateConnData;
leCreateConnData.interval = interval;
leCreateConnData.window = window;
leCreateConnData.initiatorFilter = initiatorFilter;
leCreateConnData.peerBdaddrType = peerBdaddrType;
memcpy(leCreateConnData.peerBdaddr, peerBdaddr, sizeof(leCreateConnData.peerBdaddr));
leCreateConnData.ownBdaddrType = ownBdaddrType;
leCreateConnData.minInterval = minInterval;
leCreateConnData.maxInterval = maxInterval;
leCreateConnData.latency = latency;
leCreateConnData.supervisionTimeout = supervisionTimeout;
leCreateConnData.minCeLength = minCeLength;
leCreateConnData.maxCeLength = maxCeLength;
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_CREATE_CONN, sizeof(leCreateConnData), &leCreateConnData);
}
int HCIClass::leCancelConn()
{
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_CANCEL_CONN, 0, NULL);
}
int HCIClass::leConnUpdate(uint16_t handle, uint16_t minInterval, uint16_t maxInterval,
uint16_t latency, uint16_t supervisionTimeout)
{
struct __attribute__ ((packed)) HCILeConnUpdateData {
uint16_t handle;
uint16_t minInterval;
uint16_t maxInterval;
uint16_t latency;
uint16_t supervisionTimeout;
uint16_t minCeLength;
uint16_t maxCeLength;
} leConnUpdateData;
leConnUpdateData.handle = handle;
leConnUpdateData.minInterval = minInterval;
leConnUpdateData.maxInterval = maxInterval;
leConnUpdateData.latency = latency;
leConnUpdateData.supervisionTimeout = supervisionTimeout;
leConnUpdateData.minCeLength = 0x0004;
leConnUpdateData.maxCeLength = 0x0006;
return sendCommand(OGF_LE_CTL << 10 | OCF_LE_CONN_UPDATE, sizeof(leConnUpdateData), &leConnUpdateData);
}
int HCIClass::saveNewAddress(uint8_t addressType, uint8_t* address, uint8_t* peerIrk, uint8_t* localIrk){
if(_storeIRK!=0){
_storeIRK(address, peerIrk);
}
// Again... this should work
// leAddResolvingAddress(addressType, address, peerIrk, localIrk);
}
int HCIClass::leAddResolvingAddress(uint8_t addressType, uint8_t* peerAddress, uint8_t* peerIrk, uint8_t* localIrk){
leStopResolvingAddresses();
struct __attribute__ ((packed)) AddDevice {
uint8_t peerAddressType;
uint8_t peerAddress[6];
uint8_t peerIRK[16];
uint8_t localIRK[16];
} addDevice;
addDevice.peerAddressType = addressType;
for(int i=0; i<6; i++) addDevice.peerAddress[5-i] = peerAddress[i];
for(int i=0; i<16; i++) {
addDevice.peerIRK[15-i] = peerIrk[i];
addDevice.localIRK[15-i] = localIrk[i];
}
Serial.print("ADDTYPE :");
btct.printBytes(&addDevice.peerAddressType,1);
Serial.print("adddddd :");
btct.printBytes(addDevice.peerAddress,6);
Serial.print("Peer IRK :");
btct.printBytes(addDevice.peerIRK,16);
Serial.print("localIRK :");
btct.printBytes(addDevice.localIRK,16);
sendCommand(OGF_LE_CTL << 10 | 0x27, sizeof(addDevice), &addDevice);
leStartResolvingAddresses();
}
int HCIClass::leStopResolvingAddresses(){
uint8_t enable = 0;
return HCI.sendCommand(OGF_LE_CTL << 10 | 0x2D, 1,&enable); // Disable address resolution
}
int HCIClass::leStartResolvingAddresses(){
uint8_t enable = 1;
return HCI.sendCommand(OGF_LE_CTL << 10 | 0x2D, 1,&enable); // Disable address resolution
}
int HCIClass::leReadPeerResolvableAddress(uint8_t peerAddressType, uint8_t* peerIdentityAddress, uint8_t* peerResolvableAddress){
struct __attribute__ ((packed)) Request {
uint8_t addressType;
uint8_t identityAddress[6];
} request;
request.addressType = peerAddressType;
for(int i=0; i<6; i++) request.identityAddress[5-i] = peerIdentityAddress[i];
int res = sendCommand(OGF_LE_CTL << 10 | 0x2B, sizeof(request), &request);
Serial.print("res: 0x");
Serial.println(res, HEX);
if(res==0){
struct __attribute__ ((packed)) Response {
uint8_t status;
uint8_t peerResolvableAddress[6];
} *response = (Response*)_cmdResponse;
Serial.print("Address resolution status: 0x");
Serial.println(response->status, HEX);
Serial.print("peer resolvable address: ");
btct.printBytes(response->peerResolvableAddress,6);
}
return res;
}
int HCIClass::writeLK(uint8_t peerAddress[], uint8_t LK[]){
struct __attribute__ ((packed)) StoreLK {
uint8_t nKeys;
uint8_t BD_ADDR[6];
uint8_t LTK[16];
} storeLK;
storeLK.nKeys = 1;
memcpy(storeLK.BD_ADDR, peerAddress, 6);
for(int i=0; i<16; i++) storeLK.LTK[15-i] = LK[i];
HCI.sendCommand(OGF_HOST_CTL << 10 | 0x11, sizeof(storeLK), &storeLK);
}
int HCIClass::readStoredLKs(){
uint8_t BD_ADDR[6];
readStoredLK(BD_ADDR, 1);
}
int HCIClass::readStoredLK(uint8_t BD_ADDR[], uint8_t read_all ){
struct __attribute__ ((packed)) Request {
uint8_t BD_ADDR[6];
uint8_t read_a;
} request = {0,0};
for(int i=0; i<6; i++) request.BD_ADDR[5-i] = BD_ADDR[i];
request.read_a = read_all;
return sendCommand(OGF_HOST_CTL << 10 | 0xD, sizeof(request), &request);
}
int HCIClass::tryResolveAddress(uint8_t* BDAddr, uint8_t* address){
uint8_t iphone[16] = {0xA6, 0xD2, 0xD, 0xD3, 0x4F, 0x13, 0x42, 0x4F, 0xE1, 0xC1, 0xFD, 0x22, 0x2E, 0xC5, 0x6A, 0x2D};
uint8_t irk[16];
for(int i=0; i<16; i++) irk[15-i] = iphone[i];
bool foundMatch = false;
if(HCI._getIRKs!=0){
uint8_t nIRKs = 0;
uint8_t** BDAddrType = new uint8_t*;
uint8_t*** BADDRs = new uint8_t**;
uint8_t*** IRKs = new uint8_t**;
uint8_t* memcheck;
if(!HCI._getIRKs(&nIRKs, BDAddrType, BADDRs, IRKs)){
Serial.println("error getting IRKs.");
}
for(int i=0; i<nIRKs; i++){
if(!foundMatch){
#ifdef _BLE_TRACE_
Serial.print("BDAddr type: : 0x");
Serial.println((*BDAddrType)[i],HEX);
Serial.print("BDAddr : ");
btct.printBytes((*BADDRs)[i],6);
Serial.print("IRK : ");
btct.printBytes((*IRKs)[i],16);
#endif
uint8_t hashresult[3];
btct.ah((*IRKs)[i], BDAddr, hashresult);
#ifdef _BLE_TRACE_
Serial.print("hash match : ");
btct.printBytes(hashresult,3);
Serial.print(" : ");
btct.printBytes(&BDAddr[3],3);
#endif
for(int k=0; k<3; k++){
if(hashresult[k] == BDAddr[3 + k]){
foundMatch = true;
}else{
foundMatch = false;
break;
}
}
if(foundMatch){
memcpy(address, (*BADDRs)[i],6);
}
}
delete[] (*BADDRs)[i];
delete[] (*IRKs)[i];
}
delete[] (*BDAddrType);
delete BDAddrType;
delete[] (*BADDRs);
delete BADDRs;
delete[] (*IRKs);
delete IRKs;
if(foundMatch){
return 1;
}
}
return 0;
}
int HCIClass::sendAclPkt(uint16_t handle, uint8_t cid, uint8_t plen, const void* data)
{
while (_pendingPkt >= _maxPkt) {
poll();
}
struct __attribute__ ((packed)) HCIACLHdr {
uint8_t pktType;
uint16_t handle;
uint16_t dlen;
uint16_t plen;
uint16_t cid;
} aclHdr = { HCI_ACLDATA_PKT, handle, uint8_t(plen + 4), plen, cid };
uint8_t* txBuffer = (uint8_t*)malloc(sizeof(aclHdr) + plen);
memcpy(txBuffer, &aclHdr, sizeof(aclHdr));
memcpy(&txBuffer[sizeof(aclHdr)], data, plen);
if (_debug) {
dumpPkt("HCI ACLDATA TX -> ", sizeof(aclHdr) + plen, txBuffer);
}
#ifdef _BLE_TRACE_
Serial.print("Data tx -> ");
for(int i=0; i< sizeof(aclHdr) + plen;i++){
Serial.print(" 0x");
Serial.print(txBuffer[i],HEX);
}
Serial.println(".");
#endif
_pendingPkt++;
HCITransport.write(txBuffer, sizeof(aclHdr) + plen);
free(txBuffer);
return 0;
}
int HCIClass::disconnect(uint16_t handle)
{
struct __attribute__ ((packed)) HCIDisconnectData {
uint16_t handle;
uint8_t reason;
} disconnectData = { handle, HCI_OE_USER_ENDED_CONNECTION };
return sendCommand(OGF_LINK_CTL << 10 | OCF_DISCONNECT, sizeof(disconnectData), &disconnectData);
}
void HCIClass::debug(Stream& stream)
{
_debug = &stream;
}
void HCIClass::noDebug()
{
_debug = NULL;
}
int HCIClass::sendCommand(uint16_t opcode, uint8_t plen, const void* parameters)
{
struct __attribute__ ((packed)) {
uint8_t pktType;
uint16_t opcode;
uint8_t plen;
} pktHdr = {HCI_COMMAND_PKT, opcode, plen};
uint8_t* txBuffer = (uint8_t*)malloc(sizeof(pktHdr) + plen);
memcpy(txBuffer, &pktHdr, sizeof(pktHdr));
memcpy(&txBuffer[sizeof(pktHdr)], parameters, plen);
if (_debug) {
dumpPkt("HCI COMMAND TX -> ", sizeof(pktHdr) + plen, txBuffer);
}
#ifdef _BLE_TRACE_
Serial.print("Command tx -> ");
for(int i=0; i< sizeof(pktHdr) + plen;i++){
Serial.print(" 0x");
Serial.print(txBuffer[i],HEX);
}
Serial.println("");
#endif
HCITransport.write(txBuffer, sizeof(pktHdr) + plen);
_cmdCompleteOpcode = 0xffff;
_cmdCompleteStatus = -1;
for (unsigned long start = millis(); _cmdCompleteOpcode != opcode && millis() < (start + 1000);) {
poll();
}
free(txBuffer);
return _cmdCompleteStatus;
}
void HCIClass::handleAclDataPkt(uint8_t /*plen*/, uint8_t pdata[])
{
struct __attribute__ ((packed)) HCIACLHdr {
uint16_t handle;
uint16_t dlen;
uint16_t len;
uint16_t cid;
} *aclHdr = (HCIACLHdr*)pdata;
uint16_t aclFlags = (aclHdr->handle & 0xf000) >> 12;
if ((aclHdr->dlen - 4) != aclHdr->len) {
// packet is fragmented
if (aclFlags != 0x01) {
// copy into ACL buffer
memcpy(_aclPktBuffer, &_recvBuffer[1], sizeof(HCIACLHdr) + aclHdr->dlen - 4);
} else {
// copy next chunk into the buffer
HCIACLHdr* aclBufferHeader = (HCIACLHdr*)_aclPktBuffer;
memcpy(&_aclPktBuffer[sizeof(HCIACLHdr) + aclBufferHeader->dlen - 4], &_recvBuffer[1 + sizeof(aclHdr->handle) + sizeof(aclHdr->dlen)], aclHdr->dlen);
aclBufferHeader->dlen += aclHdr->dlen;
aclHdr = aclBufferHeader;
}
}
if ((aclHdr->dlen - 4) != aclHdr->len) {
#ifdef _BLE_TRACE_
Serial.println("Don't have full packet yet");
Serial.print("Handle: ");
btct.printBytes((uint8_t*)&aclHdr->handle,2);
Serial.print("dlen: ");
btct.printBytes((uint8_t*)&aclHdr->dlen,2);
Serial.print("len: ");
btct.printBytes((uint8_t*)&aclHdr->len,2);
Serial.print("cid: ");
btct.printBytes((uint8_t*)&aclHdr->cid,2);
#endif
// don't have the full packet yet
return;
}
if (aclHdr->cid == ATT_CID) {
if (aclFlags == 0x01) {
// use buffered packet
ATT.handleData(aclHdr->handle & 0x0fff, aclHdr->len, &_aclPktBuffer[sizeof(HCIACLHdr)]);
} else {
// use the recv buffer
ATT.handleData(aclHdr->handle & 0x0fff, aclHdr->len, &_recvBuffer[1 + sizeof(HCIACLHdr)]);
}
} else if (aclHdr->cid == SIGNALING_CID) {
#ifdef _BLE_TRACE_
Serial.println("Signalling");
#endif
L2CAPSignaling.handleData(aclHdr->handle & 0x0fff, aclHdr->len, &_recvBuffer[1 + sizeof(HCIACLHdr)]);
} else if (aclHdr->cid == SECURITY_CID){
// Security manager
#ifdef _BLE_TRACE_
Serial.println("Security data");
#endif
if (aclFlags == 0x1){
L2CAPSignaling.handleSecurityData(aclHdr->handle & 0x0fff, aclHdr->len, &_aclPktBuffer[sizeof(HCIACLHdr)]);
}else{
L2CAPSignaling.handleSecurityData(aclHdr->handle & 0x0fff, aclHdr->len, &_recvBuffer[1 + sizeof(HCIACLHdr)]);
}
}else {
struct __attribute__ ((packed)) {
uint8_t op;
uint8_t id;
uint16_t length;
uint16_t reason;
uint16_t localCid;
uint16_t remoteCid;
} l2capRejectCid= { 0x01, 0x00, 0x006, 0x0002, aclHdr->cid, 0x0000 };
#ifdef _BLE_TRACE_
Serial.print("rejecting packet cid: 0x");
Serial.println(aclHdr->cid,HEX);
#endif
sendAclPkt(aclHdr->handle & 0x0fff, 0x0005, sizeof(l2capRejectCid), &l2capRejectCid);
}
}
void HCIClass::handleNumCompPkts(uint16_t /*handle*/, uint16_t numPkts)
{
if (numPkts && _pendingPkt > numPkts) {
_pendingPkt -= numPkts;
} else {
_pendingPkt = 0;
}
}
void HCIClass::handleEventPkt(uint8_t /*plen*/, uint8_t pdata[])
{
struct __attribute__ ((packed)) HCIEventHdr {
uint8_t evt;
uint8_t plen;
} *eventHdr = (HCIEventHdr*)pdata;
#ifdef _BLE_TRACE_
Serial.print("HCI event: ");
Serial.println(eventHdr->evt, HEX);
#endif
if (eventHdr->evt == EVT_DISCONN_COMPLETE)
{
struct __attribute__ ((packed)) DisconnComplete {
uint8_t status;
uint16_t handle;
uint8_t reason;
} *disconnComplete = (DisconnComplete*)&pdata[sizeof(HCIEventHdr)];
ATT.removeConnection(disconnComplete->handle, disconnComplete->reason);
L2CAPSignaling.removeConnection(disconnComplete->handle, disconnComplete->reason);
HCI.leSetAdvertiseEnable(0x01);
}
else if (eventHdr->evt == EVT_ENCRYPTION_CHANGE)
{
struct __attribute__ ((packed)) EncryptionChange {
uint8_t status;
uint16_t connectionHandle;
uint8_t enabled;
} *encryptionChange = (EncryptionChange*)&pdata[sizeof(HCIEventHdr)];
#ifdef _BLE_TRACE_
Serial.println("[Info] Encryption changed");
Serial.print("status : ");
btct.printBytes(&encryptionChange->status,1);
Serial.print("handle : ");
btct.printBytes((uint8_t*)&encryptionChange->connectionHandle,2);
Serial.print("enabled: ");
btct.printBytes(&encryptionChange->enabled,1);
#endif
if(encryptionChange->enabled>0){
// 0001 1110
if((ATT.getPeerEncryption(encryptionChange->connectionHandle)&PEER_ENCRYPTION::PAIRING_REQUEST)>0){
if(ATT.localKeyDistribution.EncKey()){
#ifdef _BLE_TRACE_
Serial.println("Enc key set but should be ignored");
#endif
}else{
#ifdef _BLE_TRACE_
Serial.println("No enc key distribution");
#endif
}
// From page 1681 bluetooth standard - order matters
if(ATT.localKeyDistribution.IdKey()){
/// We shall distribute IRK and address using identity information
{
uint8_t response[17];
response[0] = CONNECTION_IDENTITY_INFORMATION; // Identity information.
for(int i=0; i<16; i++) response[16-i] = ATT.localIRK[i];
HCI.sendAclPkt(encryptionChange->connectionHandle, SECURITY_CID, sizeof(response), response);
#ifdef _BLE_TRACE_
Serial.println("Distribute ID Key");
#endif
}
{
uint8_t response[8];
response[0] = CONNECTION_IDENTITY_ADDRESS; // Identity address information
response[1] = 0x00; // Static local address
for(int i=0; i<6; i++) response[7-i] = HCI.localAddr[i];
HCI.sendAclPkt(encryptionChange->connectionHandle, SECURITY_CID, sizeof(response), response);
}
}
if(ATT.localKeyDistribution.SignKey()){
/// We shall distribut CSRK
#ifdef _BLE_TRACE_
Serial.println("We shall distribute CSRK // not implemented");
#endif
}else{
// Serial.println("We don't want to distribute CSRK");
}
if(ATT.localKeyDistribution.LinkKey()){
#ifdef _BLE_TRACE_
Serial.println("We would like to use LTK to generate BR/EDR // not implemented");
#endif
}
}else{
#ifdef _BLE_TRACE_
Serial.println("Reconnection, not pairing so no keys");
Serial.println(ATT.getPeerEncryption(encryptionChange->connectionHandle),HEX);
#endif
}
ATT.setPeerEncryption(encryptionChange->connectionHandle, PEER_ENCRYPTION::ENCRYPTED_AES);
if(ATT.writeBufferSize > 0){
ATT.processWriteBuffer();
}
if(ATT.holdBufferSize>0){
#ifdef _BLE_TRACE_
Serial.print("Sending queued response size: ");
Serial.println(ATT.holdBufferSize);
#endif
HCI.sendAclPkt(encryptionChange->connectionHandle, ATT_CID, ATT.holdBufferSize, ATT.holdBuffer);
ATT.holdBufferSize = 0;
}
}else{
ATT.setPeerEncryption(encryptionChange->connectionHandle, PEER_ENCRYPTION::NO_ENCRYPTION);
}
}
else if (eventHdr->evt == EVT_CMD_COMPLETE)
{
struct __attribute__ ((packed)) CmdComplete {
uint8_t ncmd;
uint16_t opcode;
uint8_t status;
} *cmdCompleteHeader = (CmdComplete*)&pdata[sizeof(HCIEventHdr)];
#ifdef _BLE_TRACE_
Serial.print("E ncmd: 0x");
Serial.println(cmdCompleteHeader->ncmd,HEX);
Serial.print("E opcode: 0x");
Serial.println(cmdCompleteHeader->opcode, HEX);
Serial.print("E status: 0x");
Serial.println(cmdCompleteHeader->status, HEX);
#endif
_cmdCompleteOpcode = cmdCompleteHeader->opcode;
_cmdCompleteStatus = cmdCompleteHeader->status;
_cmdResponseLen = pdata[1] - sizeof(CmdComplete);
_cmdResponse = &pdata[sizeof(HCIEventHdr) + sizeof(CmdComplete)];
}
else if (eventHdr->evt == EVT_CMD_STATUS)
{
struct __attribute__ ((packed)) CmdStatus {
uint8_t status;
uint8_t ncmd;
uint16_t opcode;
} *cmdStatusHeader = (CmdStatus*)&pdata[sizeof(HCIEventHdr)];
#ifdef _BLE_TRACE_
Serial.print("F n cmd: 0x");
Serial.println(cmdStatusHeader->ncmd, HEX);
Serial.print("F status: 0x");
Serial.println(cmdStatusHeader->status, HEX);
Serial.print("F opcode: 0x");
Serial.println(cmdStatusHeader->opcode, HEX);
#endif
_cmdCompleteOpcode = cmdStatusHeader->opcode;
_cmdCompleteStatus = cmdStatusHeader->status;
_cmdResponseLen = 0;
}
else if (eventHdr->evt == EVT_NUM_COMP_PKTS)
{
uint8_t numHandles = pdata[sizeof(HCIEventHdr)];
uint16_t* data = (uint16_t*)&pdata[sizeof(HCIEventHdr) + sizeof(numHandles)];
for (uint8_t i = 0; i < numHandles; i++) {
handleNumCompPkts(data[0], data[1]);
#ifdef _BLE_TRACE_
Serial.print("Outstanding packets: ");
Serial.println(_pendingPkt);
Serial.print("Data[0]: 0x");
Serial.println(data[0]);
Serial.print("Data[1]: 0x");
Serial.println(data[1]);
#endif
data += 2;
}
}
else if(eventHdr->evt == EVT_RETURN_LINK_KEYS)
{
uint8_t num_keys = (uint8_t)pdata[sizeof(HCIEventHdr)];
// Serial.print("N keys: ");
// Serial.println(num_keys);
uint8_t BD_ADDRs[num_keys][6];
uint8_t LKs[num_keys][16];
auto nAddresss = [pdata](uint8_t nAddr)->uint8_t*{
return (uint8_t*) &pdata[sizeof(HCIEventHdr)] + 1 + nAddr*6 + nAddr*16;
};
auto nLK = [pdata](uint8_t nLK)->uint8_t*{
return (uint8_t*) &pdata[sizeof(HCIEventHdr)] + 1 + (nLK+1)*6 + nLK*16;
};
// Serial.println("Stored LKs are: ");
// for(int i=0; i<num_keys; i++){
// Serial.print("Address : ");
// btct.printBytes(nAddresss(i),6);
// Serial.print("LK : ");
// btct.printBytes(nLK(i),16);
// }
}
else if(eventHdr->evt == 0x10)
{
struct __attribute__ ((packed)) CmdHardwareError {