mirror of
https://github.com/h2zero/esp-nimble-cpp.git
synced 2024-05-20 16:01:20 +02:00
302 lines
8.1 KiB
C++
302 lines
8.1 KiB
C++
/*
|
|
* NimBLEUUID.cpp
|
|
*
|
|
* Created: on Jan 24 2020
|
|
* Author H2zero
|
|
*
|
|
* Originally:
|
|
*
|
|
* BLEUUID.cpp
|
|
*
|
|
* Created on: Jun 21, 2017
|
|
* Author: kolban
|
|
*/
|
|
#include "sdkconfig.h"
|
|
#if defined(CONFIG_BT_ENABLED)
|
|
|
|
#include "NimBLEUtils.h"
|
|
#include "NimBLEUUID.h"
|
|
#include "NimBLELog.h"
|
|
|
|
static const char* LOG_TAG = "NimBLEUUID";
|
|
|
|
|
|
/**
|
|
* @brief Create a UUID from a string.
|
|
*
|
|
* Create a UUID from a string. There will be two possible stories here. Either the string represents
|
|
* a binary data field or the string represents a hex encoding of a UUID.
|
|
* For the hex encoding, here is an example:
|
|
*
|
|
* ```
|
|
* "beb5483e-36e1-4688-b7f5-ea07361b26a8"
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
|
|
* 12345678-90ab-cdef-1234-567890abcdef
|
|
* ```
|
|
*
|
|
* This has a length of 36 characters. We need to parse this into 16 bytes.
|
|
*
|
|
* @param [in] value The string to build a UUID from.
|
|
*/
|
|
NimBLEUUID::NimBLEUUID(std::string value) {
|
|
m_valueSet = true;
|
|
if (value.length() == 4) {
|
|
m_uuid.u.type = BLE_UUID_TYPE_16;
|
|
m_uuid.u16.value = 0;
|
|
for(int i=0;i<value.length();){
|
|
uint8_t MSB = value.c_str()[i];
|
|
uint8_t LSB = value.c_str()[i+1];
|
|
|
|
if(MSB > '9') MSB -= 7;
|
|
if(LSB > '9') LSB -= 7;
|
|
m_uuid.u16.value += (((MSB&0x0F) <<4) | (LSB & 0x0F))<<(2-i)*4;
|
|
i+=2;
|
|
}
|
|
}
|
|
else if (value.length() == 8) {
|
|
m_uuid.u.type = BLE_UUID_TYPE_32;
|
|
m_uuid.u32.value = 0;
|
|
for(int i=0;i<value.length();){
|
|
uint8_t MSB = value.c_str()[i];
|
|
uint8_t LSB = value.c_str()[i+1];
|
|
|
|
if(MSB > '9') MSB -= 7;
|
|
if(LSB > '9') LSB -= 7;
|
|
m_uuid.u32.value += (((MSB&0x0F) <<4) | (LSB & 0x0F))<<(6-i)*4;
|
|
i+=2;
|
|
}
|
|
}
|
|
else if (value.length() == 16) { // how we can have 16 byte length string reprezenting 128 bit uuid??? needs to be investigated (lack of time)
|
|
m_uuid.u.type = BLE_UUID_TYPE_128;
|
|
NimBLEUtils::memrcpy(m_uuid.u128.value, (uint8_t*)value.data(), 16);
|
|
}
|
|
else if (value.length() == 36) {
|
|
// If the length of the string is 36 bytes then we will assume it is a long hex string in
|
|
// UUID format.
|
|
m_uuid.u.type = BLE_UUID_TYPE_128;
|
|
int n = 0;
|
|
for(int i=0;i<value.length();){
|
|
if(value.c_str()[i] == '-')
|
|
i++;
|
|
uint8_t MSB = value.c_str()[i];
|
|
uint8_t LSB = value.c_str()[i+1];
|
|
|
|
if(MSB > '9') MSB -= 7;
|
|
if(LSB > '9') LSB -= 7;
|
|
m_uuid.u128.value[15-n++] = ((MSB&0x0F) <<4) | (LSB & 0x0F);
|
|
i+=2;
|
|
}
|
|
}
|
|
else {
|
|
NIMBLE_LOGE(LOG_TAG,"ERROR: UUID value not 2, 4, 16 or 36 bytes");
|
|
m_valueSet = false;
|
|
}
|
|
} // NimBLEUUID(std::string)
|
|
|
|
|
|
/**
|
|
* @brief Create a UUID from 16 bytes of memory.
|
|
*
|
|
* @param [in] pData The pointer to the start of the UUID.
|
|
* @param [in] size The size of the data.
|
|
* @param [in] msbFirst Is the MSB first in pData memory?
|
|
*/
|
|
NimBLEUUID::NimBLEUUID(uint8_t* pData, size_t size, bool msbFirst) {
|
|
/*** TODO: change this to use the Nimble function for various lenght UUIDs:
|
|
int ble_uuid_init_from_buf(ble_uuid_any_t *uuid, const void *buf, size_t len);
|
|
***/
|
|
if (size != 16) {
|
|
NIMBLE_LOGE(LOG_TAG,"ERROR: UUID length not 16 bytes");
|
|
return;
|
|
}
|
|
m_uuid.u.type = BLE_UUID_TYPE_128;
|
|
if (msbFirst) {
|
|
NimBLEUtils::memrcpy(m_uuid.u128.value, pData, 16);
|
|
} else {
|
|
memcpy(m_uuid.u128.value, pData, 16);
|
|
}
|
|
m_valueSet = true;
|
|
} // NimBLEUUID
|
|
|
|
|
|
/**
|
|
* @brief Create a UUID from the 16bit value.
|
|
*
|
|
* @param [in] uuid The 16bit short form UUID.
|
|
*/
|
|
NimBLEUUID::NimBLEUUID(uint16_t uuid) {
|
|
m_uuid.u.type = BLE_UUID_TYPE_16;
|
|
m_uuid.u16.value = uuid;
|
|
m_valueSet = true;
|
|
} // NimBLEUUID
|
|
|
|
|
|
/**
|
|
* @brief Create a UUID from the 32bit value.
|
|
*
|
|
* @param [in] uuid The 32bit short form UUID.
|
|
*/
|
|
NimBLEUUID::NimBLEUUID(uint32_t uuid) {
|
|
m_uuid.u.type = BLE_UUID_TYPE_32;
|
|
m_uuid.u32.value = uuid;
|
|
m_valueSet = true;
|
|
} // NimBLEUUID
|
|
|
|
|
|
/**
|
|
* @brief Create a UUID from the native UUID.
|
|
*
|
|
* @param [in] uuid The native UUID.
|
|
*/
|
|
|
|
NimBLEUUID::NimBLEUUID(ble_uuid128_t* uuid) {
|
|
m_uuid.u.type = BLE_UUID_TYPE_128;
|
|
memcpy(m_uuid.u128.value, uuid->value, 16);
|
|
m_valueSet = true;
|
|
} // NimBLEUUID
|
|
|
|
|
|
NimBLEUUID::NimBLEUUID() {
|
|
m_valueSet = false;
|
|
} // NimBLEUUID
|
|
|
|
|
|
/**
|
|
* @brief Get the number of bits in this uuid.
|
|
* @return The number of bits in the UUID. One of 16, 32 or 128.
|
|
*/
|
|
uint8_t NimBLEUUID::bitSize() {
|
|
if (!m_valueSet) return 0;
|
|
return m_uuid.u.type;
|
|
} // bitSize
|
|
|
|
|
|
/**
|
|
* @brief Compare a UUID against this UUID.
|
|
*
|
|
* @param [in] uuid The UUID to compare against.
|
|
* @return True if the UUIDs are equal and false otherwise.
|
|
*/
|
|
bool NimBLEUUID::equals(NimBLEUUID uuid) {
|
|
if(ble_uuid_cmp(&m_uuid.u, &uuid.getNative()->u) == 0){
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a BLEUUID from a string of the form:
|
|
* 0xNNNN
|
|
* 0xNNNNNNNN
|
|
* 0x<UUID>
|
|
* NNNN
|
|
* NNNNNNNN
|
|
* <UUID>
|
|
*/
|
|
|
|
NimBLEUUID NimBLEUUID::fromString(std::string _uuid) {
|
|
uint8_t start = 0;
|
|
if (strstr(_uuid.c_str(), "0x") != nullptr) { // If the string starts with 0x, skip those characters.
|
|
start = 2;
|
|
}
|
|
uint8_t len = _uuid.length() - start; // Calculate the length of the string we are going to use.
|
|
|
|
if(len == 4) {
|
|
uint16_t x = strtoul(_uuid.substr(start, len).c_str(), NULL, 16);
|
|
return NimBLEUUID(x);
|
|
} else if (len == 8) {
|
|
uint32_t x = strtoul(_uuid.substr(start, len).c_str(), NULL, 16);
|
|
return NimBLEUUID(x);
|
|
} else if (len == 36) {
|
|
return NimBLEUUID(_uuid);
|
|
}
|
|
return NimBLEUUID();
|
|
} // fromString
|
|
|
|
|
|
/**
|
|
* @brief Get the native UUID value.
|
|
*
|
|
* @return The native UUID value or NULL if not set.
|
|
*/
|
|
ble_uuid_any_t* NimBLEUUID::getNative() {
|
|
if (m_valueSet == false) {
|
|
NIMBLE_LOGD(LOG_TAG,"<< Return of un-initialized UUID!");
|
|
return nullptr;
|
|
}
|
|
return &m_uuid;
|
|
} // getNative
|
|
|
|
|
|
/**
|
|
* @brief Convert a UUID to its 128 bit representation.
|
|
*
|
|
* A UUID can be internally represented as 16bit, 32bit or the full 128bit. This method
|
|
* will convert 16 or 32 bit representations to the full 128bit.
|
|
*/
|
|
NimBLEUUID NimBLEUUID::to128() {
|
|
// If we either don't have a value or are already a 128 bit UUID, nothing further to do.
|
|
if (!m_valueSet || m_uuid.u.type == BLE_UUID_TYPE_128) {
|
|
return *this;
|
|
}
|
|
|
|
// If we are 16 bit or 32 bit, then set the 4 bytes of the variable part of the UUID.
|
|
if (m_uuid.u.type == BLE_UUID_TYPE_16) {
|
|
uint16_t temp = m_uuid.u16.value;
|
|
m_uuid.u128.value[15] = 0;
|
|
m_uuid.u128.value[14] = 0;
|
|
m_uuid.u128.value[13] = (temp >> 8) & 0xff;
|
|
m_uuid.u128.value[12] = temp & 0xff;
|
|
|
|
}
|
|
else if (m_uuid.u.type == BLE_UUID_TYPE_32) {
|
|
uint32_t temp = m_uuid.u32.value;
|
|
m_uuid.u128.value[15] = (temp >> 24) & 0xff;
|
|
m_uuid.u128.value[14] = (temp >> 16) & 0xff;
|
|
m_uuid.u128.value[13] = (temp >> 8) & 0xff;
|
|
m_uuid.u128.value[12] = temp & 0xff;
|
|
}
|
|
|
|
// Set the fixed parts of the UUID.
|
|
m_uuid.u128.value[11] = 0x00;
|
|
m_uuid.u128.value[10] = 0x00;
|
|
|
|
m_uuid.u128.value[9] = 0x10;
|
|
m_uuid.u128.value[8] = 0x00;
|
|
|
|
m_uuid.u128.value[7] = 0x80;
|
|
m_uuid.u128.value[6] = 0x00;
|
|
|
|
m_uuid.u128.value[5] = 0x00;
|
|
m_uuid.u128.value[4] = 0x80;
|
|
m_uuid.u128.value[3] = 0x5f;
|
|
m_uuid.u128.value[2] = 0x9b;
|
|
m_uuid.u128.value[1] = 0x34;
|
|
m_uuid.u128.value[0] = 0xfb;
|
|
|
|
m_uuid.u.type = BLE_UUID_TYPE_128;
|
|
return *this;
|
|
} // to128
|
|
|
|
|
|
/**
|
|
* @brief Get a string representation of the UUID.
|
|
*
|
|
* The format of a string is:
|
|
* 01234567 8901 2345 6789 012345678901
|
|
* 0000180d-0000-1000-8000-00805f9b34fb
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
|
|
*
|
|
* @return A string representation of the UUID.
|
|
*/
|
|
std::string NimBLEUUID::toString() {
|
|
if (!m_valueSet) return "<NULL>"; // If we have no value, nothing to format.
|
|
|
|
char buf[BLE_UUID_STR_LEN];
|
|
|
|
return ble_uuid_to_str(&m_uuid.u, buf);
|
|
} // toString
|
|
|
|
#endif /* CONFIG_BT_ENABLED */
|