WLAN Overview

Introduction

The WLAN module is developed based on the OpenHarmony Driver Foundation. It supports cross-OS migration, component adaptation, and modular assembly and compilation. Based on the unified APIs provided by the WLAN module, driver developers of WLAN vendors can adapt their driver code and developers of the hardware abstraction layer (HAL) are capable of creating, disabling, scanning, and connecting to WLAN hotspots. The following figure shows the framework of the WLAN module:

Figure 1 WLAN framework

WLAN Driver API Architecture

The WLAN module provides the following three types of APIs:

• APIs for HAL developers
• APIs that can be called directly by driver developers
• APIs for driver developers of different vendors to implement

This document provides guidelines on how to initialize a WLAN module.

Figure 2 Available APIs of the WLAN module

Available APIs

The WLAN driver module provides APIs for HAL developers, such as creating, disabling, scanning, connecting to or disconnecting from WLAN hotpots.

The WLAN driver module provides APIs that can be directly called by driver developers, such as creating/releasing a WifiModule, connecting to/disconnecting from a WLAN hotspot, applying for/releasing a network data buffer, and converting between the pbuf structure of Lightweight TCP/IP Stack (lwIP) and a network data buffer.

Table 1 describes some APIs.

Table 1 APIs that can be directly called by driver developers

The WLAN driver module provides APIs for driver developers to implement capabilities, such as initializing/deregistering, opening/stopping a network device, and obtaining the state of a network device.

Table 2 describes some APIs.

Table 2 APIs for driver developers of WLAN vendors to implement