158 lines
3.6 KiB
Go
158 lines
3.6 KiB
Go
package relay
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import (
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"context"
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"fmt"
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"io"
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"net"
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"time"
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"github.com/go-gost/core/handler"
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"github.com/go-gost/core/ingress"
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"github.com/go-gost/core/listener"
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md "github.com/go-gost/core/metadata"
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"github.com/go-gost/relay"
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admission "github.com/go-gost/x/admission/wrapper"
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xnet "github.com/go-gost/x/internal/net"
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"github.com/go-gost/x/internal/net/proxyproto"
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"github.com/go-gost/x/internal/util/forward"
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climiter "github.com/go-gost/x/limiter/conn/wrapper"
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limiter "github.com/go-gost/x/limiter/traffic/wrapper"
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metrics "github.com/go-gost/x/metrics/wrapper"
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)
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type epListener struct {
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ln net.Listener
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options listener.Options
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}
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func NewEntryPointListener(opts ...listener.Option) listener.Listener {
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options := listener.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &epListener{
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options: options,
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}
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}
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func (l *epListener) Init(md md.Metadata) (err error) {
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network := "tcp"
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if xnet.IsIPv4(l.options.Addr) {
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network = "tcp4"
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}
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ln, err := net.Listen(network, l.options.Addr)
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if err != nil {
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return
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}
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// l.logger.Debugf("pp: %d", l.options.ProxyProtocol)
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ln = metrics.WrapListener(l.options.Service, ln)
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ln = proxyproto.WrapListener(l.options.ProxyProtocol, ln, 10*time.Second)
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ln = admission.WrapListener(l.options.Admission, ln)
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ln = limiter.WrapListener(l.options.TrafficLimiter, ln)
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ln = climiter.WrapListener(l.options.ConnLimiter, ln)
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l.ln = ln
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return
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}
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func (l *epListener) Accept() (conn net.Conn, err error) {
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return l.ln.Accept()
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}
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func (l *epListener) Addr() net.Addr {
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return l.ln.Addr()
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}
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func (l *epListener) Close() error {
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return l.ln.Close()
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}
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type epHandler struct {
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pool *ConnectorPool
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ingress ingress.Ingress
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options handler.Options
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}
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func NewEntryPointHandler(pool *ConnectorPool, ingress ingress.Ingress, opts ...handler.Option) handler.Handler {
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options := handler.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &epHandler{
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pool: pool,
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ingress: ingress,
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options: options,
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}
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}
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func (h *epHandler) Init(md md.Metadata) (err error) {
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return
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}
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func (h *epHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
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defer conn.Close()
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start := time.Now()
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log := h.options.Logger.WithFields(map[string]any{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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})
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log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
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defer func() {
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log.WithFields(map[string]any{
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"duration": time.Since(start),
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}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
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}()
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var rw io.ReadWriter = conn
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var host string
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var protocol string
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rw, host, protocol, _ = forward.Sniffing(ctx, conn)
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h.options.Logger.Debugf("sniffing: host=%s, protocol=%s", host, protocol)
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var tunnelID relay.TunnelID
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if h.ingress != nil {
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tunnelID = parseTunnelID(h.ingress.Get(host))
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}
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if tunnelID.IsPrivate() {
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err := fmt.Errorf("tunnel %s is private", tunnelID)
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log.Error(err)
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return err
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}
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log = log.WithFields(map[string]any{
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"tunnel": tunnelID.String(),
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})
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cc, err := getTunnelConn(h.pool, tunnelID, 3, log)
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if err != nil {
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log.Error(err)
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return err
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}
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defer cc.Close()
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log.Debugf("%s >> %s", conn.RemoteAddr(), cc.RemoteAddr())
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af := &relay.AddrFeature{}
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af.ParseFrom(conn.RemoteAddr().String())
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resp := relay.Response{
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Version: relay.Version1,
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Status: relay.StatusOK,
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Features: []relay.Feature{af},
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}
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resp.WriteTo(cc)
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t := time.Now()
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log.Debugf("%s <-> %s", conn.RemoteAddr(), cc.RemoteAddr())
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xnet.Transport(rw, cc)
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log.WithFields(map[string]any{
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"duration": time.Since(t),
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}).Debugf("%s >-< %s", conn.RemoteAddr(), cc.RemoteAddr())
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return nil
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}
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