75 lines
1.2 KiB
Go
75 lines
1.2 KiB
Go
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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"strings"
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log "github.com/sirupsen/logrus"
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)
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type disabledTun struct {
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block chan struct{}
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cidr *net.IPNet
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logger *log.Logger
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}
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func newDisabledTun(cidr *net.IPNet, l *log.Logger) *disabledTun {
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return &disabledTun{
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cidr: cidr,
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block: make(chan struct{}),
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logger: l,
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}
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}
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func (*disabledTun) Activate() error {
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return nil
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}
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func (t *disabledTun) CidrNet() *net.IPNet {
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return t.cidr
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}
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func (*disabledTun) DeviceName() string {
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return "disabled"
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}
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func (t *disabledTun) Read(b []byte) (int, error) {
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<-t.block
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return 0, io.EOF
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}
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func (t *disabledTun) Write(b []byte) (int, error) {
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t.logger.WithField("raw", prettyPacket(b)).Debugf("Disabled tun received unexpected payload")
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return len(b), nil
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}
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func (t *disabledTun) WriteRaw(b []byte) error {
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_, err := t.Write(b)
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return err
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}
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func (t *disabledTun) Close() error {
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if t.block != nil {
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close(t.block)
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t.block = nil
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}
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return nil
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}
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type prettyPacket []byte
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func (p prettyPacket) String() string {
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var s strings.Builder
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for i, b := range p {
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if i > 0 && i%8 == 0 {
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s.WriteString(" ")
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}
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s.WriteString(fmt.Sprintf("%02x ", b))
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}
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return s.String()
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}
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