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a9a746ba2f
取消Client的LocalAddr，改为 LocalTCPAddr 和 LocalUDPAddr 删除direct中的对应条目。这样可更清晰地配置双本地地址 将设置sendthrough设置双地址的代码移动到 proxy.newClient函数 这样不仅direct可指定不同的tcp和udp的本地地址，任何client协议都可以了 为ClientCreator 接口 添加 UseUDPAsMsgConn 方法，direct和ss返回true 在ss的client的EstablishUDPChannel进行自行拨号 在ss的server建立后，自动循环监听udp，绕过vs的基本监听机制。因为vs架构的限制，一个代理只能有一个唯一的传输层协议。 ServerCreator 接口 添加 AfterCommonConfServer 方法
119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
package simplesocks
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import (
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"bytes"
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"io"
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"net"
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"net/url"
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"github.com/e1732a364fed/v2ray_simple/netLayer"
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"github.com/e1732a364fed/v2ray_simple/proxy"
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"github.com/e1732a364fed/v2ray_simple/utils"
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)
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func init() {
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proxy.RegisterServer(Name, &ServerCreator{})
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}
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type ServerCreator struct{ proxy.CreatorCommonStruct }
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func (ServerCreator) NewServer(lc *proxy.ListenConf) (proxy.Server, error) {
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s := &Server{}
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return s, nil
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}
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func (ServerCreator) URLToListenConf(u *url.URL, lc *proxy.ListenConf, format int) (*proxy.ListenConf, error) {
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if lc == nil {
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lc = &proxy.ListenConf{}
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}
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return lc, nil
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}
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// implements proxy.Server
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type Server struct {
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proxy.Base
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}
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func (*Server) Name() string {
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return Name
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}
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func (*Server) CanFallback() bool {
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return true //simplesocks理论上当然是支持回落的，但是一般它被用于 innerMux的内层协议，所以用做innerMux内层协议时，要注意不要再回落了。
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}
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// 若握手步骤数据不对, 会返回 ErrDetail 为 utils.ErrInvalidData 的 utils.ErrInErr
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func (s *Server) Handshake(underlay net.Conn) (result net.Conn, msgConn netLayer.MsgConn, targetAddr netLayer.Addr, returnErr error) {
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if err := proxy.SetCommonReadTimeout(underlay); err != nil {
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returnErr = err
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return
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}
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defer netLayer.PersistConn(underlay)
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readbs := utils.GetBytes(utils.MTU)
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wholeReadLen, err := underlay.Read(readbs)
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if err != nil {
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returnErr = utils.ErrInErr{ErrDesc: "Err, simplesocks handshake, read underlay", ErrDetail: err, Data: wholeReadLen}
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return
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}
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if wholeReadLen < 4 {
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returnErr = utils.ErrInErr{ErrDesc: "Err, simplesocks, msg too short", Data: wholeReadLen}
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return
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}
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readbuf := bytes.NewBuffer(readbs[:wholeReadLen])
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goto realPart
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errorPart:
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//所返回的 buffer 必须包含所有数据，而 bytes.Buffer 是不支持回退的，所以只能重新 New
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returnErr = &utils.ErrBuffer{
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Err: returnErr,
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Buf: bytes.NewBuffer(readbs[:wholeReadLen]),
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}
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return
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realPart:
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cmdb, _ := readbuf.ReadByte()
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var isudp bool
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switch cmdb {
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default:
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returnErr = utils.ErrInErr{ErrDesc: "Err, simplesocks, cmd byte wrong", ErrDetail: utils.ErrInvalidData, Data: cmdb}
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goto errorPart
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case CmdTCP:
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case CmdUDP:
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isudp = true
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}
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targetAddr, err = GetAddrFrom(readbuf)
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if err != nil {
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returnErr = err
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goto errorPart
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}
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if isudp {
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targetAddr.Network = "udp"
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}
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if isudp {
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x := NewUDPConn(underlay, io.MultiReader(readbuf, underlay))
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x.fullcone = s.IsFullcone
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return nil, x, targetAddr, nil
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} else {
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return &TCPConn{
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Conn: underlay,
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optionalReader: io.MultiReader(readbuf, underlay),
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remainFirstBufLen: readbuf.Len(),
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underlayIsBasic: netLayer.IsBasicConn(underlay),
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isServerEnd: true,
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}, nil, targetAddr, nil
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}
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}
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