105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
// +build e2e_testing
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package nebula
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import (
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"fmt"
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"io"
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"net"
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"github.com/sirupsen/logrus"
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)
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type Tun struct {
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Device string
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Cidr *net.IPNet
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MTU int
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UnsafeRoutes []route
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l *logrus.Logger
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rxPackets chan []byte // Packets to receive into nebula
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txPackets chan []byte // Packets transmitted outside by nebula
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}
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func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, _ []route, unsafeRoutes []route, _ int, _ bool) (ifce *Tun, err error) {
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return &Tun{
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Device: deviceName,
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Cidr: cidr,
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MTU: defaultMTU,
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UnsafeRoutes: unsafeRoutes,
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l: l,
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rxPackets: make(chan []byte, 1),
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txPackets: make(chan []byte, 1),
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}, nil
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}
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func newTunFromFd(_ *logrus.Logger, _ int, _ *net.IPNet, _ int, _ []route, _ []route, _ int) (ifce *Tun, err error) {
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return nil, fmt.Errorf("newTunFromFd not supported")
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}
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// Send will place a byte array onto the receive queue for nebula to consume
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// These are unencrypted ip layer frames destined for another nebula node.
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// packets should exit the udp side, capture them with udpConn.Get
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func (c *Tun) Send(packet []byte) {
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c.l.WithField("dataLen", len(packet)).Info("Tun receiving injected packet")
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c.rxPackets <- packet
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}
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// Get will pull an unencrypted ip layer frame from the transmit queue
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// nebula meant to send this message to some application on the local system
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// packets were ingested from the udp side, you can send them with udpConn.Send
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func (c *Tun) Get(block bool) []byte {
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if block {
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return <-c.txPackets
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}
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select {
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case p := <-c.txPackets:
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return p
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default:
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return nil
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}
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}
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//********************************************************************************************************************//
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// Below this is boilerplate implementation to make nebula actually work
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//********************************************************************************************************************//
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func (c *Tun) Activate() error {
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return nil
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}
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func (c *Tun) CidrNet() *net.IPNet {
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return c.Cidr
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}
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func (c *Tun) DeviceName() string {
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return c.Device
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}
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func (c *Tun) Write(b []byte) (n int, err error) {
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return len(b), c.WriteRaw(b)
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}
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func (c *Tun) Close() error {
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close(c.rxPackets)
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return nil
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}
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func (c *Tun) WriteRaw(b []byte) error {
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packet := make([]byte, len(b), len(b))
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copy(packet, b)
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c.txPackets <- packet
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return nil
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}
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func (c *Tun) Read(b []byte) (int, error) {
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p := <-c.rxPackets
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copy(b, p)
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return len(p), nil
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}
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func (c *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
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return nil, fmt.Errorf("TODO: multiqueue not implemented")
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}
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