mirror of
https://github.com/net-byte/vtun
synced 2024-03-14 10:50:03 +08:00
96 lines
2.2 KiB
Go
96 lines
2.2 KiB
Go
package quic
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import (
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"context"
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"crypto/tls"
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"log"
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"time"
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"github.com/lucas-clemente/quic-go"
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"github.com/net-byte/vtun/common/cache"
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"github.com/net-byte/vtun/common/cipher"
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"github.com/net-byte/vtun/common/config"
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"github.com/net-byte/vtun/tun"
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"github.com/songgao/water"
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)
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// Start quic client
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func StartClient(config config.Config) {
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log.Printf("vtun quic client started on %v", config.LocalAddr)
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iface := tun.CreateTun(config)
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tlsconfig := &tls.Config{
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InsecureSkipVerify: config.TLSInsecureSkipVerify,
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NextProtos: []string{"vtun/1.0"},
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}
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if config.TLSSni != "" {
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tlsconfig.ServerName = config.TLSSni
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}
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quicConfig := &quic.Config{
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ConnectionIDLength: 12,
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HandshakeIdleTimeout: time.Second * 10,
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MaxIdleTimeout: time.Second * 30,
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KeepAlive: true,
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}
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go tunToQuic(config, iface)
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for {
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session, err := quic.DialAddr(config.ServerAddr, tlsconfig, quicConfig)
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if err != nil {
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log.Println(err)
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time.Sleep(3 * time.Second)
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continue
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}
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stream, err := session.OpenStreamSync(context.Background())
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if err != nil {
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log.Println(err)
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session.CloseWithError(0, "bye")
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continue
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}
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cache.GetCache().Set("quicconn", stream, 24*time.Hour)
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quicToTun(config, stream, iface)
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cache.GetCache().Delete("quicconn")
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session.CloseWithError(0, "bye")
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}
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}
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func tunToQuic(config config.Config, iface *water.Interface) {
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packet := make([]byte, config.MTU)
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for {
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n, err := iface.Read(packet)
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if err != nil || n == 0 {
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continue
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}
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if v, ok := cache.GetCache().Get("quicconn"); ok {
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b := packet[:n]
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if config.Obfs {
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b = cipher.XOR(b)
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}
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stream := v.(quic.Stream)
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stream.SetWriteDeadline(time.Now().Add(time.Duration(config.Timeout) * time.Second))
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_, err = stream.Write(b)
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if err != nil {
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continue
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}
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}
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}
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}
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func quicToTun(config config.Config, stream quic.Stream, iface *water.Interface) {
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defer stream.Close()
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packet := make([]byte, config.MTU)
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for {
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stream.SetReadDeadline(time.Now().Add(time.Duration(config.Timeout) * time.Second))
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n, err := stream.Read(packet)
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if err != nil {
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break
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}
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b := packet[:n]
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if config.Obfs {
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b = cipher.XOR(b)
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}
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_, err = iface.Write(b)
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if err != nil {
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break
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}
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}
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}
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