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-rw-r--r--ble/Bluetooth.cpp30
-rw-r--r--ble/Bluetooth.h28
-rw-r--r--ble/BluetoothImpl.h73
-rw-r--r--ble/ByteBuffer.cpp37
-rw-r--r--ble/ByteBuffer.h20
-rw-r--r--ble/LinuxBluetooth.cpp44
6 files changed, 174 insertions, 58 deletions
diff --git a/ble/Bluetooth.cpp b/ble/Bluetooth.cpp
index 31f82e3..fe63b4f 100644
--- a/ble/Bluetooth.cpp
+++ b/ble/Bluetooth.cpp
@@ -3,7 +3,6 @@
#include <sstream>
#include <iomanip>
-#include <string.h>
namespace trygvis {
namespace bluetooth {
@@ -49,7 +48,7 @@ void Mac::copy(uint8_t &_0, uint8_t &_1, uint8_t &_2, uint8_t &_3, uint8_t &_4,
_5 = bytes[5];
}
-Mac Mac::parseMac(string s) throw(BluetoothException) {
+Mac Mac::parseMac(string s) {
unsigned int bytes[6];
int count = sscanf(s.c_str(), "%02x:%02x:%02x:%02x:%02x:%02x",
&bytes[0], &bytes[1], &bytes[2], &bytes[3], &bytes[4], &bytes[5]);
@@ -86,6 +85,17 @@ void AttPdu::makeReadByType(ByteBuffer &bytes, uint16_t startHandle, uint16_t en
bytes.write16le(uuid.value);
}
+void AttPdu::makeRead(ByteBuffer &bytes, uint16_t handle) {
+ bytes.write8(AttPduType::READ_REQ);
+ bytes.write16le(handle);
+}
+
+void AttPdu::makeWrite(ByteBuffer &req, uint16_t handle, const ByteBuffer &bytes) {
+ req.write8(AttPduType::WRITE_REQ);
+ req.write16le(handle);
+ req.write(bytes);
+}
+
vector<AttributeData> AttPdu::parse(ByteBuffer &bytes, AttPduType type) {
DF << "bytes: " << bytes.toString();
@@ -128,6 +138,22 @@ vector<AttributeData> AttPdu::parseReadByType(ByteBuffer &bytes) {
return parse(bytes, READ_BY_TYPE_RES);
}
+void AttPdu::parseRead(ByteBuffer &bytes) {
+ AttPduType t = (AttPduType) bytes.read8();
+
+ if (t != READ_RES) {
+ throw BluetoothException("Unexpected type: " + to_string(t));
+ }
+}
+
+void AttPdu::parseWrite(ByteBuffer &bytes) {
+ AttPduType t = (AttPduType) bytes.read8();
+
+ if (t != WRITE_RES) {
+ throw BluetoothException("Unexpected type: " + to_string(t));
+ }
+}
+
// -----------------------------------------------------------------------
// AttributeData
// -----------------------------------------------------------------------
diff --git a/ble/Bluetooth.h b/ble/Bluetooth.h
index d6be783..6ed9c76 100644
--- a/ble/Bluetooth.h
+++ b/ble/Bluetooth.h
@@ -22,9 +22,9 @@ public:
};
namespace uuids {
-static const SpecUuid PRIMARY_SERVICE = SpecUuid(0x2800);
-static const SpecUuid SECONDARY_SERVICE = SpecUuid(0x2801);
-static const SpecUuid CHARACTERISTIC = SpecUuid(0x2803);
+const SpecUuid PRIMARY_SERVICE = SpecUuid(0x2800);
+const SpecUuid SECONDARY_SERVICE = SpecUuid(0x2801);
+const SpecUuid CHARACTERISTIC = SpecUuid(0x2803);
}
class BluetoothAdapter;
@@ -72,7 +72,7 @@ public:
void copy(uint8_t &_0, uint8_t &_1, uint8_t &_2, uint8_t &_3, uint8_t &_4, uint8_t &_5) const;
- static Mac parseMac(string s) throw(BluetoothException);
+ static Mac parseMac(string s);
friend bool operator<(const Mac &a, const Mac &b);
@@ -113,7 +113,7 @@ public:
virtual void addCharacteristic(BluetoothGattCharacteristic *characteristic) = 0;
- virtual const boost::optional<BluetoothGattCharacteristic *> findCharacteristic(boost::uuids::uuid uuid) const = 0;
+ virtual const boost::optional<BluetoothGattCharacteristic &> findCharacteristic(boost::uuids::uuid uuid) const = 0;
};
class BluetoothGatt {
@@ -128,11 +128,15 @@ public:
virtual void disconnect() = 0;
+ virtual void writeValue(const BluetoothGattCharacteristic &c, const ByteBuffer &bytes) = 0;
+
+ virtual ByteBuffer readValue(const BluetoothGattCharacteristic &c) = 0;
+
virtual void discoverServices() = 0;
virtual const vector<BluetoothGattService *> getServices() const = 0;
- virtual const boost::optional<BluetoothGattService *> findService(boost::uuids::uuid uuid) const = 0;
+ virtual const boost::optional<BluetoothGattService &> findService(boost::uuids::uuid uuid) const = 0;
};
class BluetoothDevice {
@@ -179,8 +183,12 @@ enum AttPduType {
INVALID_HANDLE = 0x01,
READ_BY_TYPE_REQ = 0x08,
READ_BY_TYPE_RES = 0x09,
+ READ_REQ = 0x0a,
+ READ_RES = 0x0b,
READ_BY_GROUP_TYPE_REQ = 0x10,
READ_BY_GROUP_TYPE_RES = 0x11,
+ WRITE_REQ = 0x12,
+ WRITE_RES = 0x13,
};
class AttributeData;
@@ -197,10 +205,18 @@ public:
static vector<AttributeData> parseReadByType(ByteBuffer &bytes);
+ static void parseRead(ByteBuffer &bytes);
+
+ static void parseWrite(ByteBuffer &bytes);
+
static void makeReadByGroupType(ByteBuffer &bytes, uint16_t startHandle, uint16_t endHandle, SpecUuid uuid);
static void makeReadByType(ByteBuffer &bytes, uint16_t startHandle, uint16_t endHandle, SpecUuid uuid);
+ static void makeRead(ByteBuffer &bytes, uint16_t handle);
+
+ static void makeWrite(ByteBuffer &req, uint16_t handle, const ByteBuffer &bytes);
+
private:
static void checkType(ByteBuffer &bytes, AttPduType type);
diff --git a/ble/BluetoothImpl.h b/ble/BluetoothImpl.h
index ef9a733..c9ba80c 100644
--- a/ble/BluetoothImpl.h
+++ b/ble/BluetoothImpl.h
@@ -2,6 +2,7 @@
#define BLUETOOTH_IMPL_H
#include "Bluetooth.h"
+#include "log.h"
#include <boost/uuid/uuid_io.hpp>
#include <cstring>
@@ -94,14 +95,14 @@ public:
characteristics.push_back(characteristic);
}
- virtual const o<BluetoothGattCharacteristic *> findCharacteristic(uuid_t uuid) const {
+ virtual const o<BluetoothGattCharacteristic &> findCharacteristic(uuid_t uuid) const {
for (auto c: characteristics) {
if (memcmp(c->getUuid().data, uuid.data, 16) == 0) {
- return o<BluetoothGattCharacteristic *>(c);
+ return o<BluetoothGattCharacteristic &>(*c);
}
}
- return o<BluetoothGattCharacteristic *>();
+ return o<BluetoothGattCharacteristic &>();
}
protected:
@@ -120,25 +121,37 @@ protected:
}
};
-template<class A>
-class DefaultBluetoothDevice : public BluetoothDevice {
+template<class _D>
+class DefaultBluetoothGatt : public BluetoothGatt {
public:
+ virtual _D &getDevice() const {
+ return device;
+ }
- virtual Mac const &getMac() override {
- return mac;
+ virtual const vector<BluetoothGattService *> getServices() const {
+ return services;
+ };
+
+ virtual const o<BluetoothGattService &> findService(uuid_t uuid) const {
+ for (auto s: services) {
+ if (memcmp(s->getUuid().data, uuid.data, 16) == 0) {
+ return o<BluetoothGattService &>(*s);
+ }
+ }
+
+ return o<BluetoothGattService &>();
}
- virtual A &getAdapter() override {
- return adapter;
+ virtual void addService(BluetoothGattService *service) {
+ services.push_back(service);
}
protected:
- DefaultBluetoothDevice(A &adapter, Mac &mac) :
- adapter(adapter), mac(mac) {
+ DefaultBluetoothGatt(_D &device) : device(device) {
DF;
}
- virtual ~DefaultBluetoothDevice() {
+ virtual ~DefaultBluetoothGatt() {
DF;
removeServices();
}
@@ -150,42 +163,29 @@ protected:
services.clear();
}
- A &adapter;
- Mac &mac;
+ _D &device;
vector<BluetoothGattService *> services;
};
-template<class _D>
-class DefaultBluetoothGatt : public BluetoothGatt {
+template<class A>
+class DefaultBluetoothDevice : public BluetoothDevice {
public:
- virtual _D &getDevice() const {
- return device;
- }
-
- virtual const vector<BluetoothGattService *> getServices() const {
- return services;
- };
-
- virtual const o<BluetoothGattService *> findService(uuid_t uuid) const {
- for (auto s: services) {
- if (memcmp(s->getUuid().data, uuid.data, 16) == 0) {
- return o<BluetoothGattService *>(s);
- }
- }
- return o<BluetoothGattService *>();
+ virtual Mac const &getMac() override {
+ return mac;
}
- virtual void addService(BluetoothGattService *service) {
- services.push_back(service);
+ virtual A &getAdapter() override {
+ return adapter;
}
protected:
- DefaultBluetoothGatt(_D &device) : device(device) {
+ DefaultBluetoothDevice(A &adapter, Mac &mac) :
+ adapter(adapter), mac(mac) {
DF;
}
- virtual ~DefaultBluetoothGatt() {
+ virtual ~DefaultBluetoothDevice() {
DF;
removeServices();
}
@@ -197,7 +197,8 @@ protected:
services.clear();
}
- _D &device;
+ A &adapter;
+ Mac &mac;
vector<BluetoothGattService *> services;
};
diff --git a/ble/ByteBuffer.cpp b/ble/ByteBuffer.cpp
index 820c638..377334b 100644
--- a/ble/ByteBuffer.cpp
+++ b/ble/ByteBuffer.cpp
@@ -2,19 +2,34 @@
#include <string.h>
#include <sstream>
#include <iomanip>
+#include <cassert>
+#include "log.h"
using namespace std;
+ByteBuffer ByteBuffer::alloc(std::size_t capacity) {
+ auto bytes = shared_ptr<uint8_t>(new uint8_t[capacity], [](uint8_t* p) {
+ delete[] p;
+ });
+ return ByteBuffer(bytes, capacity, (size_t) 0, (size_t) 0);
+}
+
ByteBuffer::ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity) :
- bytes(bytes), capacity(capacity), zero(bytes.get()), end(&bytes.get()[capacity]) {
- ptr = (uint8_t *) zero;
+ bytes(bytes), capacity(capacity), zero(bytes.get()), end(bytes.get()) {
+ ptr = const_cast<uint8_t *>(zero);
}
-ByteBuffer::ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity, size_t zero, size_t size) :
+ByteBuffer::ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity, size_t size) :
+ bytes(bytes), capacity(capacity), zero(bytes.get()), end(&bytes.get()[size]) {
+ assert(size <= capacity);
+ ptr = const_cast<uint8_t *>(this->zero);
+}
+
+ByteBuffer::ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity, size_t size, size_t zero) :
bytes(bytes), capacity(capacity), zero(&bytes.get()[zero]), end(&bytes.get()[size]) {
assert(zero <= size);
assert(size <= capacity);
- ptr = (uint8_t *) zero;
+ ptr = const_cast<uint8_t *>(this->zero);
}
ByteBuffer::ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity, const uint8_t *zero, const uint8_t *end) :
@@ -34,6 +49,20 @@ ByteBuffer &ByteBuffer::write16le(uint16_t value) {
return *this;
}
+ByteBuffer &ByteBuffer::write(const ByteBuffer &value) {
+ return write(value.zero, value.getSize());
+}
+
+ByteBuffer &ByteBuffer::write(const uint8_t *bytes, size_t len) {
+ checkAndUpdateEnd(len);
+
+ memcpy(ptr, bytes, len);
+
+ ptr += len;
+
+ return *this;
+}
+
uint8_t ByteBuffer::get8(size_t index) const {
assertCanAccessRelative(index);
return ptr[index];
diff --git a/ble/ByteBuffer.h b/ble/ByteBuffer.h
index 3836966..f884d6e 100644
--- a/ble/ByteBuffer.h
+++ b/ble/ByteBuffer.h
@@ -5,9 +5,7 @@
#include <cstdlib>
#include <string>
#include <stdexcept>
-
-// For now
-#include "log.h"
+#include <memory>
class ByteBufferException : public std::runtime_error {
public:
@@ -17,12 +15,15 @@ public:
class ByteBuffer {
public:
+ static ByteBuffer alloc(std::size_t capacity);
+
ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity);
- ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity, size_t zero, size_t size);
+ ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity, size_t size);
+
+ ByteBuffer(const std::shared_ptr<uint8_t> bytes, size_t capacity, size_t size, size_t zero);
inline size_t getSize() const {
-// DF << "end=" << (uint64_t)end << ", zero=" << (uint64_t)zero << ", size=" << (end - zero);
return end - zero;
}
@@ -39,12 +40,10 @@ public:
}
inline void setCursor(size_t newCursor) {
-// assertCanAccessRelative(newCursor);
ptr = (uint8_t *) &zero[newCursor];
}
inline void skip(size_t length) {
-// checkAndUpdateEnd(length);
ptr += length;
}
@@ -52,6 +51,13 @@ public:
ByteBuffer &write16le(uint16_t value);
+ /**
+ * Appends the entire buffer. Make a view if you want to write a part of it.
+ */
+ ByteBuffer &write(const ByteBuffer &value);
+
+ ByteBuffer &write(const uint8_t *bytes, size_t len);
+
uint8_t get8(size_t index) const;
uint8_t read8();
diff --git a/ble/LinuxBluetooth.cpp b/ble/LinuxBluetooth.cpp
index d62bf23..435dd63 100644
--- a/ble/LinuxBluetooth.cpp
+++ b/ble/LinuxBluetooth.cpp
@@ -1,6 +1,5 @@
#include "BluetoothImpl.h"
-#include <string.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
@@ -8,7 +7,6 @@
#include <map>
#include <sstream>
#include <iomanip>
-#include <numeric>
// Got to love magic constants. Taken from bluez.git/tools/btgatt-client.c
#define ATT_CID 4
@@ -77,6 +75,10 @@ public:
void discoverServices() override;
+ void writeValue(const BluetoothGattCharacteristic &c, const ByteBuffer &bytes) override;
+
+ ByteBuffer readValue(const BluetoothGattCharacteristic &c) override;
+
private:
vector<AttributeData> discoverServices(uint16_t startHandle);
@@ -224,6 +226,42 @@ uuid_t readUuid(BluetoothDevice *device, const ByteBuffer &bytes) {
return u;
}
+void LinuxBluetoothGatt::writeValue(const BluetoothGattCharacteristic &c, const ByteBuffer &bytes) {
+ DF;
+
+ D << "Writing to characteristic " << c.getUuid() << ": " << bytes.toString();
+
+ shared_ptr<uint8_t> buffer(new uint8_t[MAX_MTU]);
+ ByteBuffer out = ByteBuffer(buffer, MAX_MTU);
+
+ AttPdu::makeWrite(out, c.getValueHandle(), bytes);
+
+ ByteBuffer in = writeAndRead(out, buffer, MAX_MTU);
+
+ AttPdu::parseWrite(in);
+}
+
+ByteBuffer LinuxBluetoothGatt::readValue(const BluetoothGattCharacteristic &c) {
+ DF;
+
+ shared_ptr<uint8_t> buffer(new uint8_t[MAX_MTU]);
+ ByteBuffer out = ByteBuffer(buffer, MAX_MTU);
+
+ AttPdu::makeRead(out, c.getValueHandle());
+
+ ByteBuffer in = writeAndRead(out, buffer, MAX_MTU);
+
+ AttPdu::parseRead(in);
+
+// D << "READ response has " + to_string(in.getBytesLeft()) + " bytes";
+
+ auto response = in.view();
+
+ D << "Value of characteristic " << c.getUuid() << "=" << response.toString();
+
+ return response;
+}
+
void LinuxBluetoothGatt::discoverServices() {
uint16_t startHandle = 0x0001;
@@ -320,7 +358,7 @@ ByteBuffer LinuxBluetoothGatt::writeAndRead(ByteBuffer &out, shared_ptr<uint8_t>
throw BluetoothException(&device, "read(): " + errnoAsString());
}
- auto in = ByteBuffer(buffer, (size_t) r);
+ auto in = ByteBuffer(buffer, (size_t) r, (size_t) r);
D << "read: " << r << " bytes: " << in.toString();
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-23 14:44:57 +0000