mirror of https://github.com/slackhq/nebula.git
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package overlay
|
|
|
|
import (
|
|
"io"
|
|
"net/netip"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
"github.com/slackhq/nebula/config"
|
|
)
|
|
|
|
func NewUserDeviceFromConfig(c *config.C, l *logrus.Logger, tunCidr netip.Prefix, routines int) (Device, error) {
|
|
return NewUserDevice(tunCidr)
|
|
}
|
|
|
|
func NewUserDevice(tunCidr netip.Prefix) (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 netip.Prefix
|
|
|
|
outboundReader *io.PipeReader
|
|
outboundWriter *io.PipeWriter
|
|
|
|
inboundReader *io.PipeReader
|
|
inboundWriter *io.PipeWriter
|
|
}
|
|
|
|
func (d *UserDevice) Activate() error {
|
|
return nil
|
|
}
|
|
func (d *UserDevice) Cidr() netip.Prefix { return d.tunCidr }
|
|
func (d *UserDevice) Name() string { return "faketun0" }
|
|
func (d *UserDevice) RouteFor(ip netip.Addr) netip.Addr { 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
|
|
}
|