mirror of https://github.com/slackhq/nebula.git
70 lines
1.3 KiB
Go
70 lines
1.3 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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"os"
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"golang.org/x/sys/unix"
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)
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type Tun struct {
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io.ReadWriteCloser
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fd int
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Device string
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Cidr *net.IPNet
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MaxMTU int
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DefaultMTU int
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TXQueueLen int
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Routes []route
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UnsafeRoutes []route
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}
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func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
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file := os.NewFile(uintptr(deviceFd), "/dev/net/tun")
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ifce = &Tun{
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ReadWriteCloser: file,
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fd: int(file.Fd()),
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Device: "tun0",
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Cidr: cidr,
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DefaultMTU: defaultMTU,
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TXQueueLen: txQueueLen,
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Routes: routes,
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UnsafeRoutes: unsafeRoutes,
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}
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return
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}
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func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
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return nil, fmt.Errorf("newTun not supported in Android")
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}
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func (c *Tun) WriteRaw(b []byte) error {
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var nn int
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for {
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max := len(b)
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n, err := unix.Write(c.fd, b[nn:max])
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if n > 0 {
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nn += n
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}
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if nn == len(b) {
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return err
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}
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if err != nil {
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return err
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}
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if n == 0 {
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return io.ErrUnexpectedEOF
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}
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}
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}
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func (c Tun) Activate() error {
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c.Device = "android"
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return nil
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}
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