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using sing-tun instead of tun2socket
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,161 +1,34 @@ | ||
| package tun | ||
|
|
||
| import ( | ||
| "encoding/binary" | ||
| "io" | ||
| "net" | ||
| "os" | ||
| "time" | ||
| "net/netip" | ||
|
|
||
| "github.com/Kr328/tun2socket" | ||
|
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| "github.com/metacubex/mihomo/adapter/inbound" | ||
| "github.com/metacubex/mihomo/common/pool" | ||
| C "github.com/metacubex/mihomo/constant" | ||
| LC "github.com/metacubex/mihomo/listener/config" | ||
| "github.com/metacubex/mihomo/listener/sing_tun" | ||
| "github.com/metacubex/mihomo/log" | ||
| "github.com/metacubex/mihomo/transport/socks5" | ||
| "github.com/metacubex/mihomo/tunnel" | ||
| ) | ||
|
|
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| var _, ipv4LoopBack, _ = net.ParseCIDR("127.0.0.0/8") | ||
|
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| func Start(fd int, gateway, portal, dns string) (io.Closer, error) { | ||
| log.Debugln("TUN: fd = %d, gateway = %s, portal = %s, dns = %s", fd, gateway, portal, dns) | ||
|
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| device := os.NewFile(uintptr(fd), "/dev/tun") | ||
|
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| ip, network, err := net.ParseCIDR(gateway) | ||
| if err != nil { | ||
| panic(err.Error()) | ||
| } else { | ||
| network.IP = ip | ||
| options := LC.Tun{ | ||
| Enable: true, | ||
| Device: sing_tun.InterfaceName, | ||
| Stack: C.TunSystem, | ||
| DNSHijack: []string{dns + ":53"}, // "172.19.0.2" or "0.0.0.0" | ||
| Inet4Address: []netip.Prefix{netip.MustParsePrefix(gateway)}, // "172.19.0.1/30" | ||
| MTU: 9000, // private const val TUN_MTU = 9000 in TunService.kt | ||
| FileDescriptor: fd, | ||
| } | ||
|
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||
| stack, err := tun2socket.StartTun2Socket(device, network, net.ParseIP(portal)) | ||
| listener, err := sing_tun.New(options, tunnel.Tunnel) | ||
| if err != nil { | ||
| _ = device.Close() | ||
|
|
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| log.Errorln("TUN:", err) | ||
| return nil, err | ||
| } | ||
|
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| dnsAddr := net.ParseIP(dns) | ||
|
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| tcp := func() { | ||
| defer stack.TCP().Close() | ||
| defer log.Debugln("TCP: closed") | ||
|
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| for stack.TCP().SetDeadline(time.Time{}) == nil { | ||
| conn, err := stack.TCP().Accept() | ||
| if err != nil { | ||
| log.Debugln("Accept connection: %v", err) | ||
|
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| continue | ||
| } | ||
|
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| lAddr := conn.LocalAddr().(*net.TCPAddr) | ||
| rAddr := conn.RemoteAddr().(*net.TCPAddr) | ||
|
|
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| if ipv4LoopBack.Contains(rAddr.IP) { | ||
| conn.Close() | ||
|
|
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| continue | ||
| } | ||
|
|
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| if shouldHijackDns(dnsAddr, rAddr.IP, rAddr.Port) { | ||
| go func() { | ||
| defer conn.Close() | ||
|
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| buf := pool.Get(pool.UDPBufferSize) | ||
| defer pool.Put(buf) | ||
|
|
||
| for { | ||
| conn.SetReadDeadline(time.Now().Add(C.DefaultTCPTimeout)) | ||
|
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| length := uint16(0) | ||
| if err := binary.Read(conn, binary.BigEndian, &length); err != nil { | ||
| return | ||
| } | ||
|
|
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| if int(length) > len(buf) { | ||
| return | ||
| } | ||
|
|
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| n, err := conn.Read(buf[:length]) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
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| msg, err := relayDns(buf[:n]) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
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| _, _ = conn.Write(msg) | ||
| } | ||
| }() | ||
|
|
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| continue | ||
| } | ||
|
|
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| go tunnel.Tunnel.HandleTCPConn(conn, createMetadata(lAddr, rAddr)) | ||
| } | ||
| } | ||
|
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| udp := func() { | ||
| defer stack.UDP().Close() | ||
| defer log.Debugln("UDP: closed") | ||
|
|
||
| for { | ||
| buf := pool.Get(pool.UDPBufferSize) | ||
|
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| n, lRAddr, rRAddr, err := stack.UDP().ReadFrom(buf) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
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| raw := buf[:n] | ||
| lAddr := lRAddr.(*net.UDPAddr) | ||
| rAddr := rRAddr.(*net.UDPAddr) | ||
|
|
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| if ipv4LoopBack.Contains(rAddr.IP) { | ||
| pool.Put(buf) | ||
|
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| continue | ||
| } | ||
|
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| if shouldHijackDns(dnsAddr, rAddr.IP, rAddr.Port) { | ||
| go func() { | ||
| defer pool.Put(buf) | ||
|
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| msg, err := relayDns(raw) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
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| _, _ = stack.UDP().WriteTo(msg, rAddr, lAddr) | ||
| }() | ||
|
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| continue | ||
| } | ||
|
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| pkt := &packet{ | ||
| local: lAddr, | ||
| data: raw, | ||
| writeBack: func(b []byte, addr net.Addr) (int, error) { | ||
| return stack.UDP().WriteTo(b, addr, lAddr) | ||
| }, | ||
| drop: func() { | ||
| pool.Put(buf) | ||
| }, | ||
| } | ||
|
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| tunnel.Tunnel.HandleUDPPacket(inbound.NewPacket(socks5.ParseAddrToSocksAddr(rAddr), pkt, C.SOCKS5)) | ||
| } | ||
| } | ||
|
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| go tcp() | ||
| go udp() | ||
| go udp() | ||
|
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| return stack, nil | ||
| return listener, nil | ||
| } |
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