nebula/overlay/user.go

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