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Copy pathHAPIPAccessoryProtocol.c
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HAPIPAccessoryProtocol.c
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// Copyright (c) 2015-2019 The HomeKit ADK Contributors
//
// Licensed under the Apache License, Version 2.0 (the “License”);
// you may not use this file except in compliance with the License.
// See [CONTRIBUTORS.md] for the list of HomeKit ADK project authors.
#include "HAP+Internal.h"
static const HAPLogObject logObject = { .subsystem = kHAP_LogSubsystem, .category = "IPAccessoryProtocol" };
typedef struct {
struct {
bool isDefined;
uint64_t value;
} aid;
struct {
bool isDefined;
uint64_t value;
} iid;
HAPIPWriteValueType type;
union {
int32_t intValue;
uint64_t unsignedIntValue;
float floatValue;
struct {
char* _Nullable bytes;
size_t numBytes;
} stringValue;
} value;
struct {
char* _Nullable bytes;
size_t numBytes;
} authorizationData;
HAPIPEventNotificationState ev;
bool remote;
bool response;
} HAPIPWriteRequestParameters;
HAP_RESULT_USE_CHECK
static unsigned long long int uintval(uint64_t ui) {
return (unsigned long long int) ui;
}
HAP_RESULT_USE_CHECK
static size_t try_read_uint(const char* buffer, size_t length, unsigned int* r) {
size_t k;
HAPAssert(buffer != NULL);
HAPAssert(r != NULL);
*r = 0;
k = 0;
HAPAssert(k <= length);
while ((k < length) && ('0' <= buffer[k]) && (buffer[k] <= '9') &&
(*r <= (UINT_MAX - (unsigned int) (buffer[k] - '0')) / 10)) {
*r = *r * 10 + (unsigned int) (buffer[k] - '0');
k++;
}
HAPAssert(
(k == length) || ((k < length) && ((buffer[k] < '0') || (buffer[k] > '9') ||
(*r > (UINT_MAX - (unsigned int) (buffer[k] - '0')) / 10))));
return k;
}
HAP_RESULT_USE_CHECK
static size_t try_read_uint64(const char* buffer, size_t length, uint64_t* r) {
size_t k;
HAPAssert(buffer != NULL);
HAPAssert(r != NULL);
*r = 0;
k = 0;
HAPAssert(k <= length);
while ((k < length) && ('0' <= buffer[k]) && (buffer[k] <= '9') &&
(*r <= (UINT64_MAX - (uint64_t)(buffer[k] - '0')) / 10)) {
*r = *r * 10 + (uint64_t)(buffer[k] - '0');
k++;
}
HAPAssert(
(k == length) || ((k < length) && ((buffer[k] < '0') || (buffer[k] > '9') ||
(*r > (UINT64_MAX - (uint64_t)(buffer[k] - '0')) / 10))));
return k;
}
/**
* Finds the corresponding accessory object for the provided accessory instance ID and characteristic instance ID.
*
* @param server_ Accessory server.
* @param aid Accessory instance ID.
*
* @return The accessory object for the provided accessory instance ID or NULL, if
* no corresponding accessory object was found.
*/
HAP_RESULT_USE_CHECK
static const HAPAccessory* _Nullable GetAccessory(HAPAccessoryServerRef* server_, uint64_t aid) {
HAPPrecondition(server_);
HAPAccessoryServer* server = (HAPAccessoryServer*) server_;
HAPPrecondition(server->primaryAccessory);
const HAPAccessory* accessory = NULL;
if (server->primaryAccessory->aid == aid) {
accessory = server->primaryAccessory;
} else if (server->ip.bridgedAccessories) {
for (size_t i = 0; server->ip.bridgedAccessories[i]; i++) {
if (server->ip.bridgedAccessories[i]->aid == aid) {
accessory = server->ip.bridgedAccessories[i];
break;
}
}
}
return accessory;
}
/**
* Finds the corresponding characteristic object for the provided accessory instance ID and characteristic instance ID.
*
* @param server Accessory server.
* @param aid Accessory instance ID.
* @param iid Characteristic instance ID.
*
* @return The characteristic object for the provided accessory instance ID and characteristic instance ID or NULL, if
* no corresponding characteristic object was found.
*/
HAP_RESULT_USE_CHECK
static const HAPCharacteristic* _Nullable GetCharacteristic(HAPAccessoryServerRef* server, uint64_t aid, uint64_t iid) {
HAPPrecondition(server);
const HAPAccessory* accessory = GetAccessory(server, aid);
if (accessory) {
for (size_t serviceIndex = 0; accessory->services[serviceIndex]; serviceIndex++) {
const HAPService* service = accessory->services[serviceIndex];
if (!HAPAccessoryServerSupportsService(server, kHAPTransportType_IP, service)) {
continue;
}
for (size_t characteristicIndex = 0; service->characteristics[characteristicIndex]; characteristicIndex++) {
const HAPBaseCharacteristic* characteristic_ = service->characteristics[characteristicIndex];
if (!HAPIPCharacteristicIsSupported(characteristic_)) {
continue;
}
if (characteristic_->iid != iid) {
continue;
}
return characteristic_;
}
}
}
return NULL;
}
HAP_RESULT_USE_CHECK
HAPError HAPIPAccessoryProtocolGetCharacteristicReadRequests(
char* bytes,
size_t numBytes,
HAPIPReadContextRef* readContexts,
size_t maxReadContexts,
size_t* numReadContexts,
HAPIPReadRequestParameters* parameters) {
HAPError err;
bool done;
unsigned int x;
uint64_t aid, iid;
size_t i, k, n;
HAPAssert(bytes != NULL);
HAPAssert(readContexts != NULL);
HAPAssert(numReadContexts != NULL);
HAPAssert(parameters != NULL);
*numReadContexts = 0;
parameters->meta = false;
parameters->perms = false;
parameters->type = false;
parameters->ev = false;
err = kHAPError_None;
i = 0;
HAPAssert(i <= numBytes);
while (!err && (i < numBytes)) {
if ((numBytes - i >= 3) && (bytes[i] == 'i') && (bytes[i + 1] == 'd') && (bytes[i + 2] == '=')) {
i += 3;
HAPAssert(i <= numBytes);
if (i < numBytes) {
done = false;
do {
HAPAssert(i <= numBytes);
k = i;
i += try_read_uint64(&bytes[i], numBytes - i, &aid);
HAPAssert(k <= i);
HAPAssert(i <= numBytes);
if ((k < i) && (i < numBytes) && (bytes[i] == '.')) {
i++;
k = i;
i += try_read_uint64(&bytes[i], numBytes - i, &iid);
HAPAssert(k <= i);
HAPAssert(i <= numBytes);
if ((k < i) && ((i == numBytes) || ((bytes[i] < '0') || (bytes[i] > '9')))) {
if (*numReadContexts < maxReadContexts) {
HAPIPReadContext* readContext = (HAPIPReadContext*) &readContexts[*numReadContexts];
HAPRawBufferZero(readContext, sizeof *readContext);
readContext->aid = aid;
readContext->iid = iid;
(*numReadContexts)++;
} else {
HAPAssert(*numReadContexts == maxReadContexts);
err = kHAPError_OutOfResources;
}
HAPAssert(i <= numBytes);
if ((i == numBytes) || (bytes[i] != ',')) {
done = true;
} else {
i++;
}
} else {
err = kHAPError_InvalidData;
}
} else {
err = kHAPError_InvalidData;
}
} while (!err && !done);
}
} else if (
(numBytes - i >= 5) && (bytes[i] == 'm') && (bytes[i + 1] == 'e') && (bytes[i + 2] == 't') &&
(bytes[i + 3] == 'a') && (bytes[i + 4] == '=')) {
i += 5;
n = try_read_uint(&bytes[i], numBytes - i, &x);
if ((n == 1) && ((x == 0) || (x == 1))) {
parameters->meta = x != 0;
i++;
} else {
err = kHAPError_InvalidData;
}
} else if (
(numBytes - i >= 6) && (bytes[i] == 'p') && (bytes[i + 1] == 'e') && (bytes[i + 2] == 'r') &&
(bytes[i + 3] == 'm') && (bytes[i + 4] == 's') && (bytes[i + 5] == '=')) {
i += 6;
n = try_read_uint(&bytes[i], numBytes - i, &x);
if ((n == 1) && ((x == 0) || (x == 1))) {
parameters->perms = x != 0;
i++;
} else {
err = kHAPError_InvalidData;
}
} else if (
(numBytes - i >= 5) && (bytes[i] == 't') && (bytes[i + 1] == 'y') && (bytes[i + 2] == 'p') &&
(bytes[i + 3] == 'e') && (bytes[i + 4] == '=')) {
i += 5;
n = try_read_uint(&bytes[i], numBytes - i, &x);
if ((n == 1) && ((x == 0) || (x == 1))) {
parameters->type = x != 0;
i++;
} else {
err = kHAPError_InvalidData;
}
} else if ((numBytes - i >= 3) && (bytes[i] == 'e') && (bytes[i + 1] == 'v') && (bytes[i + 2] == '=')) {
i += 3;
n = try_read_uint(&bytes[i], numBytes - i, &x);
if ((n == 1) && ((x == 0) || (x == 1))) {
parameters->ev = x != 0;
i++;
} else {
err = kHAPError_InvalidData;
}
} else {
err = kHAPError_InvalidData;
}
HAPAssert(i <= numBytes);
if (!err && (i < numBytes)) {
switch (bytes[i]) {
case '&':
i++;
break;
case '#':
numBytes = i;
break;
default:
err = kHAPError_InvalidData;
break;
}
}
}
HAPAssert(err || (i == numBytes));
return err;
}
HAP_RESULT_USE_CHECK
size_t HAPIPAccessoryProtocolGetNumCharacteristicReadResponseBytes(
HAPAccessoryServerRef* server,
HAPIPReadContextRef* readContexts,
size_t numReadContexts,
HAPIPReadRequestParameters* parameters) {
HAPPrecondition(server);
HAPPrecondition(readContexts);
HAPPrecondition(parameters);
size_t r, i, n;
int success;
r = 22;
i = 0;
HAPAssert(i <= numReadContexts);
while ((i < numReadContexts) && (((HAPIPReadContext*) &readContexts[i])->status == 0)) {
i++;
}
HAPIPReadContext* readContext = (HAPIPReadContext*) &readContexts[i];
HAPAssert((i == numReadContexts) || ((i < numReadContexts) && (readContext->status != 0)));
success = i == numReadContexts;
for (i = 0; i < numReadContexts; i++) {
readContext = (HAPIPReadContext*) &readContexts[i];
const HAPBaseCharacteristic* chr_ = GetCharacteristic(server, readContext->aid, readContext->iid);
HAPAssert(chr_ || (readContext->status != 0));
r += (i == 0 ? 15 : 16) + HAPUInt64GetNumDescriptionBytes(readContext->aid) +
HAPUInt64GetNumDescriptionBytes(readContext->iid);
if (parameters->type && chr_) {
r += 10 + HAPUUIDGetNumDescriptionBytes(chr_->characteristicType);
}
if (parameters->meta && chr_) {
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
r += 16;
} break;
case kHAPCharacteristicFormat_UInt8: {
r += 17;
} break;
case kHAPCharacteristicFormat_UInt16: {
r += 18;
} break;
case kHAPCharacteristicFormat_UInt32: {
r += 18;
} break;
case kHAPCharacteristicFormat_UInt64: {
r += 18;
} break;
case kHAPCharacteristicFormat_Int: {
r += 15;
} break;
case kHAPCharacteristicFormat_Float: {
r += 17;
} break;
case kHAPCharacteristicFormat_String: {
r += 18;
} break;
case kHAPCharacteristicFormat_TLV8: {
r += 16;
} break;
case kHAPCharacteristicFormat_Data: {
r += 16;
} break;
}
}
if (readContext->status == 0) {
HAPAssert(chr_);
r += success ? 9 : 20;
if (HAPUUIDAreEqual(chr_->characteristicType, &kHAPCharacteristicType_ProgrammableSwitchEvent)) {
r += 4;
} else {
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
r += 1;
} break;
case kHAPCharacteristicFormat_UInt8:
case kHAPCharacteristicFormat_UInt16:
case kHAPCharacteristicFormat_UInt32:
case kHAPCharacteristicFormat_UInt64: {
r += HAPUInt64GetNumDescriptionBytes(readContext->value.unsignedIntValue);
} break;
case kHAPCharacteristicFormat_Int: {
r += HAPInt32GetNumDescriptionBytes(readContext->value.intValue);
} break;
case kHAPCharacteristicFormat_Float: {
r += HAPJSONUtilsGetFloatNumDescriptionBytes(readContext->value.floatValue);
} break;
case kHAPCharacteristicFormat_String:
case kHAPCharacteristicFormat_TLV8:
case kHAPCharacteristicFormat_Data: {
r += 2 + HAPJSONUtilsGetNumEscapedStringDataBytes(
HAPNonnull(readContext->value.stringValue.bytes),
readContext->value.stringValue.numBytes);
} break;
}
}
} else {
r += 10 + HAPInt32GetNumDescriptionBytes(readContext->status);
}
if (parameters->perms && chr_) {
n = HAPCharacteristicGetNumEnabledProperties(chr_);
r += 11 + (unsigned int) (n == 0 ? 0 : n * 4 + n - 1);
}
if (parameters->ev && chr_) {
r += 6 + (readContext->ev ? 4 : 5);
}
if (parameters->meta && chr_) {
HAPCharacteristicUnits unit = kHAPCharacteristicUnits_None;
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
} break;
case kHAPCharacteristicFormat_UInt8: {
unit = ((const HAPUInt8Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_UInt16: {
unit = ((const HAPUInt16Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_UInt32: {
unit = ((const HAPUInt32Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_UInt64: {
unit = ((const HAPUInt64Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_Int: {
unit = ((const HAPIntCharacteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_Float: {
unit = ((const HAPFloatCharacteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_String:
case kHAPCharacteristicFormat_TLV8:
case kHAPCharacteristicFormat_Data: {
} break;
}
switch (unit) {
case kHAPCharacteristicUnits_None: {
r += 0;
} break;
case kHAPCharacteristicUnits_Celsius: {
r += 17;
} break;
case kHAPCharacteristicUnits_ArcDegrees: {
r += 20;
} break;
case kHAPCharacteristicUnits_Percentage: {
r += 20;
} break;
case kHAPCharacteristicUnits_Lux: {
r += 13;
} break;
case kHAPCharacteristicUnits_Seconds: {
r += 17;
} break;
}
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
} break;
case kHAPCharacteristicFormat_UInt8: {
const HAPUInt8Characteristic* chr = (const HAPUInt8Characteristic*) chr_;
uint8_t minimumValue = chr->constraints.minimumValue;
uint8_t maximumValue = chr->constraints.maximumValue;
uint8_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT8_MAX) {
r += 35 + HAPUInt64GetNumDescriptionBytes(minimumValue) +
HAPUInt64GetNumDescriptionBytes(maximumValue) + HAPUInt64GetNumDescriptionBytes(stepValue);
}
} break;
case kHAPCharacteristicFormat_UInt16: {
const HAPUInt16Characteristic* chr = (const HAPUInt16Characteristic*) chr_;
uint16_t minimumValue = chr->constraints.minimumValue;
uint16_t maximumValue = chr->constraints.maximumValue;
uint16_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT16_MAX) {
r += 35 + HAPUInt64GetNumDescriptionBytes(minimumValue) +
HAPUInt64GetNumDescriptionBytes(maximumValue) + HAPUInt64GetNumDescriptionBytes(stepValue);
}
} break;
case kHAPCharacteristicFormat_UInt32: {
const HAPUInt32Characteristic* chr = (const HAPUInt32Characteristic*) chr_;
uint32_t minimumValue = chr->constraints.minimumValue;
uint32_t maximumValue = chr->constraints.maximumValue;
uint32_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT32_MAX) {
r += 35 + HAPUInt64GetNumDescriptionBytes(minimumValue) +
HAPUInt64GetNumDescriptionBytes(maximumValue) + HAPUInt64GetNumDescriptionBytes(stepValue);
}
} break;
case kHAPCharacteristicFormat_UInt64: {
const HAPUInt64Characteristic* chr = (const HAPUInt64Characteristic*) chr_;
uint64_t minimumValue = chr->constraints.minimumValue;
uint64_t maximumValue = chr->constraints.maximumValue;
uint64_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT64_MAX) {
r += 35 + HAPUInt64GetNumDescriptionBytes(minimumValue) +
HAPUInt64GetNumDescriptionBytes(maximumValue) + HAPUInt64GetNumDescriptionBytes(stepValue);
}
} break;
case kHAPCharacteristicFormat_Int: {
const HAPIntCharacteristic* chr = (const HAPIntCharacteristic*) chr_;
int32_t minimumValue = chr->constraints.minimumValue;
int32_t maximumValue = chr->constraints.maximumValue;
int32_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
HAPAssert(stepValue >= 0);
if (minimumValue != INT32_MIN || maximumValue != INT32_MAX) {
r += 35 + HAPInt32GetNumDescriptionBytes(minimumValue) +
HAPInt32GetNumDescriptionBytes(maximumValue) + HAPInt32GetNumDescriptionBytes(stepValue);
}
} break;
case kHAPCharacteristicFormat_Float: {
const HAPFloatCharacteristic* chr = (const HAPFloatCharacteristic*) chr_;
float minimumValue = chr->constraints.minimumValue;
float maximumValue = chr->constraints.maximumValue;
float stepValue = chr->constraints.stepValue;
HAPAssert(HAPFloatIsFinite(minimumValue) || HAPFloatIsInfinite(minimumValue));
HAPAssert(HAPFloatIsFinite(maximumValue) || HAPFloatIsInfinite(maximumValue));
HAPAssert(minimumValue <= maximumValue);
HAPAssert(stepValue >= 0);
if (!(HAPFloatIsInfinite(minimumValue) && minimumValue < 0) ||
!(HAPFloatIsInfinite(maximumValue) && maximumValue > 0)) {
r += 35 + HAPJSONUtilsGetFloatNumDescriptionBytes(minimumValue) +
HAPJSONUtilsGetFloatNumDescriptionBytes(maximumValue) +
HAPJSONUtilsGetFloatNumDescriptionBytes(stepValue);
}
} break;
case kHAPCharacteristicFormat_String: {
const HAPStringCharacteristic* chr = (const HAPStringCharacteristic*) chr_;
uint16_t maxLength = chr->constraints.maxLength;
if (maxLength != 64) {
r += 10 + HAPUInt64GetNumDescriptionBytes(maxLength);
}
} break;
case kHAPCharacteristicFormat_TLV8: {
} break;
case kHAPCharacteristicFormat_Data: {
const HAPDataCharacteristic* chr = (const HAPDataCharacteristic*) chr_;
uint32_t maxLength = chr->constraints.maxLength;
if (maxLength != 2097152) {
r += 14 + HAPUInt64GetNumDescriptionBytes(maxLength);
}
} break;
}
}
}
HAPAssert(i == numReadContexts);
return r;
}
HAP_RESULT_USE_CHECK
HAPError HAPIPAccessoryProtocolGetCharacteristicReadResponseBytes(
HAPAccessoryServerRef* server,
HAPIPReadContextRef* readContexts,
size_t numReadContexts,
HAPIPReadRequestParameters* parameters,
HAPIPByteBuffer* buffer) {
HAPPrecondition(server);
HAPPrecondition(parameters);
HAPPrecondition(buffer);
HAPError err;
int n, success;
size_t i;
char scratch_string[64];
i = 0;
HAPAssert(i <= numReadContexts);
while ((i < numReadContexts) && (((HAPIPReadContext*) &readContexts[i])->status == 0)) {
i++;
}
HAPIPReadContext* readContext = (HAPIPReadContext*) &readContexts[i];
HAPAssert((i == numReadContexts) || ((i < numReadContexts) && (readContext->status != 0)));
success = i == numReadContexts;
err = HAPIPByteBufferAppendStringWithFormat(buffer, "{\"characteristics\":[");
if (err) {
goto error;
}
for (i = 0; i < numReadContexts; i++) {
readContext = (HAPIPReadContext*) &readContexts[i];
const HAPBaseCharacteristic* chr_ = GetCharacteristic(server, readContext->aid, readContext->iid);
HAPAssert(chr_ || (readContext->status != 0));
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s{\"aid\":", i == 0 ? "" : ",");
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(readContext->aid), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s", scratch_string);
if (err) {
goto error;
}
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"iid\":");
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(readContext->iid), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s", scratch_string);
if (err) {
goto error;
}
if (parameters->type && chr_) {
err = HAPUUIDGetDescription(chr_->characteristicType, scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"type\":\"%s\"", scratch_string);
if (err) {
goto error;
}
}
if (parameters->meta && chr_) {
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"bool\"");
} break;
case kHAPCharacteristicFormat_UInt8: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"uint8\"");
} break;
case kHAPCharacteristicFormat_UInt16: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"uint16\"");
} break;
case kHAPCharacteristicFormat_UInt32: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"uint32\"");
} break;
case kHAPCharacteristicFormat_UInt64: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"uint64\"");
} break;
case kHAPCharacteristicFormat_Int: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"int\"");
} break;
case kHAPCharacteristicFormat_Float: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"float\"");
} break;
case kHAPCharacteristicFormat_String: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"string\"");
} break;
case kHAPCharacteristicFormat_TLV8: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"tlv8\"");
} break;
case kHAPCharacteristicFormat_Data: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"format\":\"data\"");
} break;
}
if (err) {
goto error;
}
}
if (readContext->status == 0) {
HAPAssert(chr_);
if (!success) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"status\":0");
if (err) {
goto error;
}
}
if (HAPUUIDAreEqual(chr_->characteristicType, &kHAPCharacteristicType_ProgrammableSwitchEvent)) {
// A read of this characteristic must always return a null value for IP accessories.
// See HomeKit Accessory Protocol Specification R14
// Section 9.75 Programmable Switch Event
const HAPAccessory* accessory = HAPNonnull(GetAccessory(server, readContext->aid));
HAPLogCharacteristicInfo(
&logObject,
chr_,
service,
accessory,
"Sending null value (readHandler callback is only called for HAP events).");
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"value\":null}");
} else {
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
err = HAPIPByteBufferAppendStringWithFormat(
buffer, ",\"value\":%s}", readContext->value.unsignedIntValue ? "1" : "0");
} break;
case kHAPCharacteristicFormat_UInt8:
case kHAPCharacteristicFormat_UInt16:
case kHAPCharacteristicFormat_UInt32:
case kHAPCharacteristicFormat_UInt64: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"value\":");
if (err) {
goto error;
}
err = HAPUInt64GetDescription(
uintval(readContext->value.unsignedIntValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s", scratch_string);
if (err) {
goto error;
}
err = HAPIPByteBufferAppendStringWithFormat(buffer, "}");
} break;
case kHAPCharacteristicFormat_Int: {
err = HAPIPByteBufferAppendStringWithFormat(
buffer, ",\"value\":%ld}", (long) readContext->value.intValue);
} break;
case kHAPCharacteristicFormat_Float: {
err = HAPJSONUtilsGetFloatDescription(
readContext->value.floatValue, scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"value\":%s}", scratch_string);
} break;
case kHAPCharacteristicFormat_String:
case kHAPCharacteristicFormat_TLV8:
case kHAPCharacteristicFormat_Data: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"value\":\"");
if (err) {
goto error;
}
size_t bufferMark = buffer->position;
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s", readContext->value.stringValue.bytes);
if (err) {
goto error;
}
size_t numStringDataBytes = readContext->value.stringValue.numBytes;
err = HAPJSONUtilsEscapeStringData(
&buffer->data[bufferMark], buffer->limit - bufferMark, &numStringDataBytes);
if (err) {
goto error;
}
buffer->position = bufferMark + numStringDataBytes;
err = HAPIPByteBufferAppendStringWithFormat(buffer, "\"}");
} break;
}
}
if (err) {
goto error;
}
} else {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"status\":%ld}", (long) readContext->status);
if (err) {
goto error;
}
}
if (parameters->perms && chr_) {
// See HomeKit Accessory Protocol Specification R14
// Section 6.3.3 Characteristic Objects
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"perms\":[");
if (err) {
goto error;
}
n = 0;
if (chr_->properties.readable) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s\"pr\"", n == 0 ? "" : ",");
if (err) {
goto error;
}
n++;
}
if (chr_->properties.writable) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s\"pw\"", n == 0 ? "" : ",");
if (err) {
goto error;
}
n++;
}
if (chr_->properties.supportsEventNotification) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s\"ev\"", n == 0 ? "" : ",");
if (err) {
goto error;
}
n++;
}
if (chr_->properties.supportsAuthorizationData) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s\"aa\"", n == 0 ? "" : ",");
if (err) {
goto error;
}
n++;
}
if (chr_->properties.requiresTimedWrite) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s\"tw\"", n == 0 ? "" : ",");
if (err) {
goto error;
}
n++;
}
if (chr_->properties.ip.supportsWriteResponse) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s\"wr\"", n == 0 ? "" : ",");
if (err) {
goto error;
}
n++;
}
if (chr_->properties.hidden) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, "%s\"hd\"", n == 0 ? "" : ",");
if (err) {
goto error;
}
n++;
}
err = HAPIPByteBufferAppendStringWithFormat(buffer, "]");
if (err) {
goto error;
}
}
if (parameters->ev && chr_) {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"ev\":%s", readContext->ev ? "true" : "false");
if (err) {
goto error;
}
}
if (parameters->meta && chr_) {
HAPCharacteristicUnits unit = kHAPCharacteristicUnits_None;
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
} break;
case kHAPCharacteristicFormat_UInt8: {
unit = ((const HAPUInt8Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_UInt16: {
unit = ((const HAPUInt16Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_UInt32: {
unit = ((const HAPUInt32Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_UInt64: {
unit = ((const HAPUInt64Characteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_Int: {
unit = ((const HAPIntCharacteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_Float: {
unit = ((const HAPFloatCharacteristic*) chr_)->units;
} break;
case kHAPCharacteristicFormat_String:
case kHAPCharacteristicFormat_TLV8:
case kHAPCharacteristicFormat_Data: {
} break;
}
switch (unit) {
case kHAPCharacteristicUnits_None: {
} break;
case kHAPCharacteristicUnits_Celsius: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"unit\":\"celsius\"");
} break;
case kHAPCharacteristicUnits_ArcDegrees: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"unit\":\"arcdegrees\"");
} break;
case kHAPCharacteristicUnits_Percentage: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"unit\":\"percentage\"");
} break;
case kHAPCharacteristicUnits_Lux: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"unit\":\"lux\"");
} break;
case kHAPCharacteristicUnits_Seconds: {
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"unit\":\"seconds\"");
} break;
}
if (err) {
goto error;
}
switch (chr_->format) {
case kHAPCharacteristicFormat_Bool: {
} break;
case kHAPCharacteristicFormat_UInt8: {
const HAPUInt8Characteristic* chr = (const HAPUInt8Characteristic*) chr_;
uint8_t minimumValue = chr->constraints.minimumValue;
uint8_t maximumValue = chr->constraints.maximumValue;
uint8_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT8_MAX) {
err = HAPUInt64GetDescription(uintval(minimumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(maximumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"maxValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(stepValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minStep\":%s", scratch_string);
if (err) {
goto error;
}
}
} break;
case kHAPCharacteristicFormat_UInt16: {
const HAPUInt16Characteristic* chr = (const HAPUInt16Characteristic*) chr_;
uint16_t minimumValue = chr->constraints.minimumValue;
uint16_t maximumValue = chr->constraints.maximumValue;
uint16_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT16_MAX) {
err = HAPUInt64GetDescription(uintval(minimumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(maximumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"maxValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(stepValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minStep\":%s", scratch_string);
if (err) {
goto error;
}
}
} break;
case kHAPCharacteristicFormat_UInt32: {
const HAPUInt32Characteristic* chr = (const HAPUInt32Characteristic*) chr_;
uint32_t minimumValue = chr->constraints.minimumValue;
uint32_t maximumValue = chr->constraints.maximumValue;
uint32_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT32_MAX) {
err = HAPUInt64GetDescription(uintval(minimumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(maximumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"maxValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(stepValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minStep\":%s", scratch_string);
if (err) {
goto error;
}
}
} break;
case kHAPCharacteristicFormat_UInt64: {
const HAPUInt64Characteristic* chr = (const HAPUInt64Characteristic*) chr_;
uint64_t minimumValue = chr->constraints.minimumValue;
uint64_t maximumValue = chr->constraints.maximumValue;
uint64_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
if (minimumValue || maximumValue != UINT64_MAX) {
err = HAPUInt64GetDescription(uintval(minimumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(maximumValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"maxValue\":%s", scratch_string);
if (err) {
goto error;
}
err = HAPUInt64GetDescription(uintval(stepValue), scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minStep\":%s", scratch_string);
if (err) {
goto error;
}
}
} break;
case kHAPCharacteristicFormat_Int: {
const HAPIntCharacteristic* chr = (const HAPIntCharacteristic*) chr_;
int32_t minimumValue = chr->constraints.minimumValue;
int32_t maximumValue = chr->constraints.maximumValue;
int32_t stepValue = chr->constraints.stepValue;
HAPAssert(minimumValue <= maximumValue);
HAPAssert(stepValue >= 0);
if (minimumValue != INT32_MIN || maximumValue != INT32_MAX) {
err = HAPIPByteBufferAppendStringWithFormat(
buffer,
",\"minValue\":%ld"
",\"maxValue\":%ld"
",\"minStep\":%ld",
(long) minimumValue,
(long) maximumValue,
(long) stepValue);
if (err) {
goto error;
}
}
} break;
case kHAPCharacteristicFormat_Float: {
const HAPFloatCharacteristic* chr = (const HAPFloatCharacteristic*) chr_;
float minimumValue = chr->constraints.minimumValue;
float maximumValue = chr->constraints.maximumValue;
float stepValue = chr->constraints.stepValue;
HAPAssert(HAPFloatIsFinite(minimumValue) || HAPFloatIsInfinite(minimumValue));
HAPAssert(HAPFloatIsFinite(maximumValue) || HAPFloatIsInfinite(maximumValue));
HAPAssert(minimumValue <= maximumValue);
HAPAssert(stepValue >= 0);
if (!(HAPFloatIsInfinite(minimumValue) && minimumValue < 0) ||
!(HAPFloatIsInfinite(maximumValue) && maximumValue > 0)) {
err = HAPJSONUtilsGetFloatDescription(minimumValue, scratch_string, sizeof scratch_string);
HAPAssert(!err);
err = HAPIPByteBufferAppendStringWithFormat(buffer, ",\"minValue\":%s", scratch_string);
if (err) {
goto error;