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tun.go
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tun.go
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package netstack
import (
"net/netip"
log "github.com/sirupsen/logrus"
"golang.zx2c4.com/wireguard/tun"
"golang.zx2c4.com/wireguard/tun/netstack"
)
type NetStackTun struct { //nolint:revive
address string
mtu int
listenAddress string
proxy *Proxy
tundev tun.Device
}
func NewNetStackTun(listenAddress string, address string, mtu int) *NetStackTun {
return &NetStackTun{
address: address,
mtu: mtu,
listenAddress: listenAddress,
}
}
func (t *NetStackTun) Create() (tun.Device, error) {
nsTunDev, tunNet, err := netstack.CreateNetTUN(
[]netip.Addr{netip.MustParseAddr(t.address)},
[]netip.Addr{},
t.mtu)
if err != nil {
return nil, err
}
t.tundev = nsTunDev
dialer := NewNSDialer(tunNet)
t.proxy, err = NewSocks5(dialer)
if err != nil {
_ = t.tundev.Close()
return nil, err
}
go func() {
err := t.proxy.ListenAndServe(t.listenAddress)
if err != nil {
log.Errorf("error in socks5 proxy serving: %s", err)
}
}()
return nsTunDev, nil
}
func (t *NetStackTun) Close() error {
var err error
if t.proxy != nil {
pErr := t.proxy.Close()
if pErr != nil {
log.Errorf("failed to close socks5 proxy: %s", pErr)
err = pErr
}
}
if t.tundev != nil {
dErr := t.tundev.Close()
if dErr != nil {
log.Errorf("failed to close netstack tun device: %s", dErr)
err = dErr
}
}
return err
}