upswitchd

Bridge two network interfaces entirely in user-mode.

Building

• Install make using your distro's package manager (apt install make, pacman -S make, etc.)
• Clone this repository and run make to build the project

Usage

• Run ./upswitchd <interface1> <interface2> to create a bridge between the two interfaces
• Press CTRL+C to exit

Supported operating systems

• Currently only Linux.
• Windows doesn't support raw sockets in user-mode, but there are kernel modules, such as WinDivert or Npcap, that could solve this problem, though.
• Not technically "user-mode", but UEFI support would be easy to implement.