proxy

README

veil-proxy

veil-proxy tunnels network traffic between veil and the Internet by creating a tun-based virtual network interface that's connected to the enclave's tun interface. A single TCP connection between veil-proxy and veil is forwarding traffic back and forth.

The diagram above illustrates the architecture. The yellow components are under your control: clients, the enclave application, and the network traffic between clients and the enclave application. veil-proxy tunnels your network traffic over a VSOCK-based point-to-point TCP connection between veil-proxy and veil. The diagram above shows a client making an HTTPS request to the enclave.

Usage

Compile and run veil-proxy by running:

make run

Performance

Take a look at this wiki page to learn more about traffic throughput.

Documentation

Index

• Constants
• func SetupTunAsEnclave() (*os.File, error)
• func SetupTunAsProxy() (*os.File, error)
• func ToggleNAT(toggle bool) error
• func TunToVsock(from io.ReadCloser, to io.WriteCloser, ch chan error, wg *sync.WaitGroup)
• func VsockToTun(from io.ReadCloser, to io.WriteCloser, ch chan error, wg *sync.WaitGroup)

Constants

const (
	On  = true
	Off = false
)

const (
	DefaultPort = 1024
)

Functions

func SetupTunAsEnclave

func SetupTunAsEnclave() (*os.File, error)

SetupTunAsEnclave sets up a tun interface and returns a ready-to-use file descriptor.

func SetupTunAsProxy

func SetupTunAsProxy() (*os.File, error)

SetupTunAsProxy sets up a tun interface and returns a ready-to-use file descriptor.

func ToggleNAT

func ToggleNAT(toggle bool) error

ToggleNAT toggles our iptables NAT rules, which ensure that the enclave can talk to the Internet.

func TunToVsock

func TunToVsock(from io.ReadCloser, to io.WriteCloser, ch chan error, wg *sync.WaitGroup)

TunToVsock forwards network packets from the tun device to our TCP-over-VSOCK connection. The function keeps on forwarding packets until we encounter an error or EOF. Errors (including EOF) are written to the given channel.

func VsockToTun

func VsockToTun(from io.ReadCloser, to io.WriteCloser, ch chan error, wg *sync.WaitGroup)

VsockToTun forwards network packets from our TCP-over-VSOCK connection to the tun interface. The function keeps on forwarding packets until we encounter an error or EOF. Errors (including EOF) are written to the given channel.