mirror of https://github.com/slackhq/nebula.git
64 lines
1.5 KiB
Go
64 lines
1.5 KiB
Go
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package overlay
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import (
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"io"
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"net"
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"github.com/sirupsen/logrus"
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"github.com/slackhq/nebula/config"
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"github.com/slackhq/nebula/iputil"
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)
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func NewUserDeviceFromConfig(c *config.C, l *logrus.Logger, tunCidr *net.IPNet, routines int) (Device, error) {
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return NewUserDevice(tunCidr)
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}
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func NewUserDevice(tunCidr *net.IPNet) (Device, error) {
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// these pipes guarantee each write/read will match 1:1
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or, ow := io.Pipe()
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ir, iw := io.Pipe()
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return &UserDevice{
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tunCidr: tunCidr,
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outboundReader: or,
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outboundWriter: ow,
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inboundReader: ir,
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inboundWriter: iw,
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}, nil
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}
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type UserDevice struct {
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tunCidr *net.IPNet
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outboundReader *io.PipeReader
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outboundWriter *io.PipeWriter
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inboundReader *io.PipeReader
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inboundWriter *io.PipeWriter
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}
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func (d *UserDevice) Activate() error {
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return nil
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}
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func (d *UserDevice) Cidr() *net.IPNet { return d.tunCidr }
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func (d *UserDevice) Name() string { return "faketun0" }
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func (d *UserDevice) RouteFor(ip iputil.VpnIp) iputil.VpnIp { return ip }
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func (d *UserDevice) NewMultiQueueReader() (io.ReadWriteCloser, error) {
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return d, nil
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}
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func (d *UserDevice) Pipe() (*io.PipeReader, *io.PipeWriter) {
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return d.inboundReader, d.outboundWriter
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}
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func (d *UserDevice) Read(p []byte) (n int, err error) {
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return d.outboundReader.Read(p)
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}
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func (d *UserDevice) Write(p []byte) (n int, err error) {
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return d.inboundWriter.Write(p)
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}
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func (d *UserDevice) Close() error {
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d.inboundWriter.Close()
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d.outboundWriter.Close()
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return nil
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}
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