aosp-part-connectivity

Data flows from apps through framework services like ConnectivityService, into native layers such as netd and DnsResolver, and down to hardware radios. This Skill maps these end-to-end paths across networking, telephony, Bluetooth, NFC, and USB/ADB subsystems.

ConnectivityService and netd are core Android networking components. ConnectivityService manages network policies and connections at the framework level, while netd handles the native execution of network rules, firewall, and tethering operations.

To debug cross-subsystem interactions, trace the data flow and IPC boundaries across stacks. This Skill documents the interfaces between Wi-Fi, Bluetooth Mainline modules, and ConnectivityService to help evaluate module boundaries and resolve interaction issues.

Yes, Android telephony uses the Radio Interface Layer (RIL) to bridge TelephonyManager framework calls to the underlying radio hardware. This Skill details the telephony stack architecture from TelephonyManager down through the RIL.

Mainline module boundaries isolate Bluetooth and NFC stacks from the core Android system to allow independent updates. The Skill identifies these boundaries, covering Bluetooth Mainline modules, NfcNci, and their specific framework interfaces.

The Android USB gadget framework handles ADB connections by exposing IUsb and IUsbGadget interfaces to route data through the USB hardware. The Skill documents this path from the adb daemon to the physical USB connection.