fix(hci): fixing issue with l2 connections queue and error handling (#5)

* fix(hci): fixing issue with l2 connections queue

* fix(example): cleanup warnings

* fix(hci): fix error handling

* chore(funding): added sponsor button

* chore(docs): update readme

* chore(docs): readme update

Author: stoprocent

FUNDING.yml

@@ -0,0 +1,15 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+polar: # Replace with a single Polar username
+buy_me_a_coffee: stoprocent # Replace with a single Buy Me a Coffee username
+thanks_dev: # Replace with a single thanks.dev username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

README.md

@@ -13,20 +13,34 @@ https://img.shields.io/npm/v/@stoprocent/bluetooth-hci-socket.svg
 )](
 https://www.npmjs.com/package/@stoprocent/bluetooth-hci-socket
 )
-[![Fediverse](
-https://img.shields.io/mastodon/follow/279303?domain=https%3A%2F%2Fmastodon.social&style=social#rzr
-)](
-https://mastodon.social/@rzr/103886495590566533#bluetooth-hci-socket
-)
-[![IRC Channel](
-https://img.shields.io/badge/chat-on%20libera-brightgreen.svg
-)](
-https://kiwiirc.com/client/irc.libera.chat/#iot
-)
 
 Bluetooth HCI socket binding for Node.js
 
-__NOTE:__ Currently only supports __Linux__, __FreeBSD__, __Windows__ or any operating systems when using HCI over uart.
+__NOTE:__ Currently only supports __Linux__, __FreeBSD__, __Windows__ or **any operating systems when using HCI over uart**.
+
+## About This Fork
+
+This fork of `node-bluetooth-hci-socket` exists to introduce several important improvements and address compatibility issues across different operating systems. 
+
+1. **System-independent UART HCI driver**: I have introduced a driver that allows UART HCI dongles to be used seamlessly across any operating system, making the library much more flexible and portable.
+   
+2. **Rewriting Native Code**: The C++ native binding code has been fully rewritten from **Nan** to **N-API**, ensuring long-term compatibility with modern versions of Node.js. Along with this, I have also resolved numerous issues that plagued the original code, improving both stability and performance.
+
+If you value these contributions and the ongoing maintenance of this project, please consider supporting my work. 
+
+[![Buy me a coffee](https://www.buymeacoffee.com/assets/img/custom_images/orange_img.png)](https://www.buymeacoffee.com/stoprocent)
+
+## Install
+
+```sh
+npm install @stoprocent/bluetooth-hci-socket
+```
+
+## Usage
+
+```javascript
+var BluetoothHciSocket = require('@stoprocent/bluetooth-hci-socket');
+```
 
 ## Prerequisites
 
@@ -85,18 +99,6 @@ Note:
 | BCM2045A0 Bluetooth 4.1 | 0x0a5c | 0x6412 |
 | Marvell AVASTAR | 0x1286 | 0x204C |
 
-## Install
-
-```sh
-npm install @stoprocent/bluetooth-hci-socket
-```
-
-## Usage
-
-```javascript
-var BluetoothHciSocket = require('@stoprocent/bluetooth-hci-socket');
-```
-
 ### Actions
 
 #### Create

examples/le-connection-test.js

@@ -189,4 +189,4 @@ function disconnectConnection (handle, reason) {
   bluetoothHciSocket.write(cmd);
 }
 
-createConnection('dc:0b:86:95:e8:a5', 'random');
+createConnection('fc:d1:75:16:7b:fc', 'random');

include/BluetoothHciSocket.h

@@ -132,7 +132,7 @@ class BluetoothHciSocket : public Napi::ObjectWrap<BluetoothHciSocket> {
    * @param data Pointer to the data buffer.
    * @return Result code.
    */
-  int kernelDisconnectWorkArounds(int length, char* data);
+  void kernelDisconnectWorkArounds(char* data, int length);
 
   /**
    * @brief Workaround for kernel connect issues.
@@ -168,6 +168,7 @@ class BluetoothHciSocket : public Napi::ObjectWrap<BluetoothHciSocket> {
   uint8_t _addressType;       ///< Address type (public or random)
 
   // Maps to manage connected and connecting L2CAP sockets
+  std::mutex _mapMutex;
   std::map<bdaddr_t, std::weak_ptr<BluetoothHciL2Socket>> _l2sockets_connected;    ///< Connected L2CAP sockets
   std::map<bdaddr_t, std::shared_ptr<BluetoothHciL2Socket>> _l2sockets_connecting; ///< Connecting L2CAP sockets
   std::map<uint16_t, std::shared_ptr<BluetoothHciL2Socket>> _l2sockets_handles;    ///< L2CAP sockets by handle

include/BluetoothStructs.h

@@ -29,6 +29,25 @@
 #define HCI_DEV_NONE  0xFFFF  ///< No HCI device
 #define HCI_MAX_DEV   16      ///< Maximum number of HCI devices
 
+// HCI Event Packet Type
+#define HCI_EVENT_PKT 0x04
+
+// HCI Event Codes
+#define HCI_EV_LE_META 0x3E
+#define HCI_EV_DISCONN_COMPLETE 0x05
+
+// HCI LE Meta Event Subevent Codes
+#define HCI_EV_LE_CONN_COMPLETE 0x01
+#define HCI_EV_LE_ENH_CONN_COMPLETE 0x0A
+
+// Status Codes
+#define HCI_SUCCESS 0x00
+
+// 
+#define HCI_COMMAND_PKT 0x01
+#define HCI_LE_CREATE_CONN 0x200D
+#define HCI_LE_EXT_CREATE_CONN 0x2043
+
 // L2CAP constants
 #define ATT_CID 4 ///< Attribute Protocol CID (Channel Identifier)
 

src/BluetoothHciL2Socket.cpp

@@ -14,7 +14,7 @@ BluetoothHciL2Socket::BluetoothHciL2Socket(BluetoothHciSocket* parent,
                                            const bdaddr_t* bdaddr_dst,
                                            uint8_t dst_type,
                                            uint64_t expires)
-    : _parent(parent), _expires(expires), _socket(-1)
+    : _socket(-1), _parent(parent), _expires(expires)
 {
     uint16_t l2cid;
 
@@ -40,9 +40,6 @@ BluetoothHciL2Socket::BluetoothHciL2Socket(BluetoothHciSocket* parent,
     _l2_dst.l2_cid = l2cid;
     memcpy(&_l2_dst.l2_bdaddr, bdaddr_dst, sizeof(bdaddr_t));
     _l2_dst.l2_bdaddr_type = dst_type; // BDADDR_LE_PUBLIC (0x01), BDADDR_LE_RANDOM (0x02)
-
-    // Attempt to connect
-    this->connect();
 }
 
 BluetoothHciL2Socket::~BluetoothHciL2Socket() {
@@ -53,12 +50,12 @@ BluetoothHciL2Socket::~BluetoothHciL2Socket() {
 }
 
 void BluetoothHciL2Socket::connect() {
-  _socket = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
-  if(_socket < 0) return;
+  this->_socket = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
+  if(this->_socket < 0) return;
 
-  if (bind(_socket, (struct sockaddr*)&_l2_src, sizeof(_l2_src)) < 0) {
-    close(_socket);
-    _socket = -1;
+  if (bind(this->_socket, (struct sockaddr*)&_l2_src, sizeof(_l2_src)) < 0) {
+    close(this->_socket);
+    this->_socket = -1;
     return;
   }