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Feature: support relay UDP traffic

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This commit is contained in:
yaling888
2022-05-22 05:32:15 +08:00
parent 622b10d34d
commit ce1014eae3
15 changed files with 414 additions and 86 deletions
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60
adapter/outbound/vless.go
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@ -58,6 +58,7 @@ type VlessOption struct {
ServerName string `proxy:"servername,omitempty"`
}
// StreamConn implements C.ProxyAdapter
func (v *Vless) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
var err error
switch v.option.Network {
@ -147,6 +148,26 @@ func (v *Vless) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
return v.client.StreamConn(c, parseVlessAddr(metadata))
}
// StreamPacketConn implements C.ProxyAdapter
func (v *Vless) StreamPacketConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
if !metadata.Resolved() {
ip, err := resolver.ResolveIP(metadata.Host)
if err != nil {
return nil, errors.New("can't resolve ip")
}
metadata.DstIP = ip
}
var err error
c, err = v.StreamConn(c, metadata)
if err != nil {
return nil, fmt.Errorf("new vmess client error: %v", err)
}
return WrapConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}), nil
}
func (v *Vless) streamTLSOrXTLSConn(conn net.Conn, isH2 bool) (net.Conn, error) {
host, _, _ := net.SplitHostPort(v.addr)
@ -219,18 +240,18 @@ func (v *Vless) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
// ListenPacketContext implements C.ProxyAdapter
func (v *Vless) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
// vless use stream-oriented udp with a special address, so we needs a net.UDPAddr
if !metadata.Resolved() {
ip, err := resolver.ResolveIP(metadata.Host)
if err != nil {
return nil, errors.New("can't resolve ip")
}
metadata.DstIP = ip
}
var c net.Conn
// gun transport
if v.transport != nil && len(opts) == 0 {
// vless use stream-oriented udp with a special address, so we needs a net.UDPAddr
if !metadata.Resolved() {
ip, err := resolver.ResolveIP(metadata.Host)
if err != nil {
return nil, errors.New("can't resolve ip")
}
metadata.DstIP = ip
}
c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
if err != nil {
return nil, err
@ -238,22 +259,27 @@ func (v *Vless) ListenPacketContext(ctx context.Context, metadata *C.Metadata, o
defer safeConnClose(c, err)
c, err = v.client.StreamConn(c, parseVlessAddr(metadata))
} else {
c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
if err != nil {
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
return nil, fmt.Errorf("new vless client error: %v", err)
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = v.StreamConn(c, metadata)
return NewPacketConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
}
c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
if err != nil {
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = v.StreamPacketConn(c, metadata)
if err != nil {
return nil, fmt.Errorf("new vless client error: %v", err)
}
return newPacketConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
return NewPacketConn(c.(net.PacketConn), v), nil
}
func parseVlessAddr(metadata *C.Metadata) *vless.DstAddr {
@ -292,7 +318,7 @@ type vlessPacketConn struct {
mux sync.Mutex
}
func (vc *vlessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
func (vc *vlessPacketConn) WriteTo(b []byte, _ net.Addr) (int, error) {
total := len(b)
if total == 0 {
return 0, nil