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Add DelayAuthWrite to socks client
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@xiaokangwang
xiaokangwang committed Mar 16, 2024
1 parent 6645af6 commit 439d13a
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Showing 4 changed files with 60 additions and 33 deletions.
18 changes: 10 additions & 8 deletions proxy/socks/client.go
View file
Expand Up @@ -23,10 +23,11 @@ import (

// Client is a Socks5 client.
type Client struct {
serverPicker protocol.ServerPicker
policyManager policy.Manager
version Version
dns dns.Client
serverPicker protocol.ServerPicker
policyManager policy.Manager
version Version
dns dns.Client
delayAuthWrite bool
}

// NewClient create a new Socks5 client based on the given config.
Expand All @@ -45,9 +46,10 @@ func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {

v := core.MustFromContext(ctx)
c := &Client{
serverPicker: protocol.NewRoundRobinServerPicker(serverList),
policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
version: config.Version,
serverPicker: protocol.NewRoundRobinServerPicker(serverList),
policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
version: config.Version,
delayAuthWrite: config.DelayAuthWrite,
}
if config.Version == Version_SOCKS4 {
c.dns = v.GetFeature(dns.ClientType()).(dns.Client)
Expand Down Expand Up @@ -145,7 +147,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
return newError("failed to establish connection to server").AtWarning().Base(err)
}
} else {
udpRequest, err = ClientHandshake(request, conn, conn)
udpRequest, err = ClientHandshake(request, conn, conn, c.delayAuthWrite)
if err != nil {
return newError("failed to establish connection to server").AtWarning().Base(err)
}
Expand Down
42 changes: 26 additions & 16 deletions proxy/socks/config.pb.go
View file
Expand Up @@ -276,8 +276,9 @@ type ClientConfig struct {
unknownFields protoimpl.UnknownFields

// Sever is a list of Socks server addresses.
Server []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
Version Version `protobuf:"varint,2,opt,name=version,proto3,enum=v2ray.core.proxy.socks.Version" json:"version,omitempty"`
Server []*protocol.ServerEndpoint `protobuf:"bytes,1,rep,name=server,proto3" json:"server,omitempty"`
Version Version `protobuf:"varint,2,opt,name=version,proto3,enum=v2ray.core.proxy.socks.Version" json:"version,omitempty"`
DelayAuthWrite bool `protobuf:"varint,3,opt,name=delay_auth_write,json=delayAuthWrite,proto3" json:"delay_auth_write,omitempty"`
}

func (x *ClientConfig) Reset() {
Expand Down Expand Up @@ -326,6 +327,13 @@ func (x *ClientConfig) GetVersion() Version {
return Version_SOCKS5
}

func (x *ClientConfig) GetDelayAuthWrite() bool {
if x != nil {
return x.DelayAuthWrite
}
return false
}

var File_proxy_socks_config_proto protoreflect.FileDescriptor

var file_proxy_socks_config_proto_rawDesc = []byte{
Expand Down Expand Up @@ -371,7 +379,7 @@ var file_proxy_socks_config_proto_rawDesc = []byte{
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Expand All @@ -380,19 +388,21 @@ var file_proxy_socks_config_proto_rawDesc = []byte{
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}

var (
Expand Down
2 changes: 2 additions & 0 deletions proxy/socks/config.proto
View file
Expand Up @@ -48,4 +48,6 @@ message ClientConfig {
// Sever is a list of Socks server addresses.
repeated v2ray.core.common.protocol.ServerEndpoint server = 1;
Version version = 2;

bool delay_auth_write = 3;
}
31 changes: 22 additions & 9 deletions proxy/socks/protocol.go
View file
Expand Up @@ -447,7 +447,7 @@ func (w *UDPWriter) WriteTo(payload []byte, addr gonet.Addr) (n int, err error)
return len(payload), err
}

func ClientHandshake(request *protocol.RequestHeader, reader io.Reader, writer io.Writer) (*protocol.RequestHeader, error) {
func ClientHandshake(request *protocol.RequestHeader, reader io.Reader, writer io.Writer, delayAuthWrite bool) (*protocol.RequestHeader, error) {
authByte := byte(authNotRequired)
if request.User != nil {
authByte = byte(authPassword)
Expand All @@ -457,14 +457,15 @@ func ClientHandshake(request *protocol.RequestHeader, reader io.Reader, writer i
defer b.Release()

common.Must2(b.Write([]byte{socks5Version, 0x01, authByte}))
if authByte == authPassword {
account := request.User.Account.(*Account)

common.Must(b.WriteByte(0x01))
common.Must(b.WriteByte(byte(len(account.Username))))
common.Must2(b.WriteString(account.Username))
common.Must(b.WriteByte(byte(len(account.Password))))
common.Must2(b.WriteString(account.Password))
if !delayAuthWrite {
if authByte == authPassword {
account := request.User.Account.(*Account)
common.Must(b.WriteByte(0x01))
common.Must(b.WriteByte(byte(len(account.Username))))
common.Must2(b.WriteString(account.Username))
common.Must(b.WriteByte(byte(len(account.Password))))
common.Must2(b.WriteString(account.Password))
}
}

if err := buf.WriteAllBytes(writer, b.Bytes()); err != nil {
Expand All @@ -485,6 +486,18 @@ func ClientHandshake(request *protocol.RequestHeader, reader io.Reader, writer i

if authByte == authPassword {
b.Clear()
if delayAuthWrite {
account := request.User.Account.(*Account)
common.Must(b.WriteByte(0x01))
common.Must(b.WriteByte(byte(len(account.Username))))
common.Must2(b.WriteString(account.Username))
common.Must(b.WriteByte(byte(len(account.Password))))
common.Must2(b.WriteString(account.Password))
if err := buf.WriteAllBytes(writer, b.Bytes()); err != nil {
return nil, err
}
b.Clear()
}
if _, err := b.ReadFullFrom(reader, 2); err != nil {
return nil, err
}
Expand Down

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