135 lines
3.1 KiB
Go
135 lines
3.1 KiB
Go
package grpc
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import (
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"context"
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"net"
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"time"
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"github.com/go-gost/core/listener"
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"github.com/go-gost/core/logger"
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md "github.com/go-gost/core/metadata"
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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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pb "github.com/go-gost/x/internal/util/grpc/proto"
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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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stats "github.com/go-gost/x/observer/stats/wrapper"
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"github.com/go-gost/x/registry"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/keepalive"
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)
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func init() {
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registry.ListenerRegistry().Register("grpc", NewListener)
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}
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type grpcListener struct {
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addr net.Addr
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server *grpc.Server
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cqueue chan net.Conn
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errChan chan error
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md metadata
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logger logger.Logger
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options listener.Options
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}
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func NewListener(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 &grpcListener{
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logger: options.Logger,
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options: options,
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}
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}
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func (l *grpcListener) Init(md md.Metadata) (err error) {
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if err = l.parseMetadata(md); err != nil {
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return
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}
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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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lc := net.ListenConfig{}
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if l.md.mptcp {
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lc.SetMultipathTCP(true)
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l.logger.Debugf("mptcp enabled: %v", lc.MultipathTCP())
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}
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ln, err := lc.Listen(context.Background(), network, l.options.Addr)
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if err != nil {
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return
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}
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ln = proxyproto.WrapListener(l.options.ProxyProtocol, ln, 10*time.Second)
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ln = metrics.WrapListener(l.options.Service, ln)
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ln = stats.WrapListener(ln, l.options.Stats)
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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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var opts []grpc.ServerOption
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if !l.md.insecure {
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opts = append(opts, grpc.Creds(credentials.NewTLS(l.options.TLSConfig)))
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}
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if l.md.keepalive {
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opts = append(opts,
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grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{
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MinTime: l.md.keepaliveMinTime,
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PermitWithoutStream: l.md.keepalivePermitWithoutStream,
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}),
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grpc.KeepaliveParams(keepalive.ServerParameters{
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MaxConnectionIdle: l.md.keepaliveMaxConnectionIdle,
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Time: l.md.keepaliveTime,
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Timeout: l.md.keepaliveTimeout,
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}),
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)
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}
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l.server = grpc.NewServer(opts...)
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l.addr = ln.Addr()
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l.cqueue = make(chan net.Conn, l.md.backlog)
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l.errChan = make(chan error, 1)
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pb.RegisterGostTunelServerX(l.server, &server{
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cqueue: l.cqueue,
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localAddr: l.addr,
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logger: l.options.Logger,
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}, l.md.path)
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go func() {
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err := l.server.Serve(ln)
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if err != nil {
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l.errChan <- err
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}
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close(l.errChan)
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}()
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return
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}
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func (l *grpcListener) Accept() (conn net.Conn, err error) {
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var ok bool
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select {
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case conn = <-l.cqueue:
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case err, ok = <-l.errChan:
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if !ok {
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err = listener.ErrClosed
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}
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}
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return
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}
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func (l *grpcListener) Close() error {
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l.server.Stop()
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return nil
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}
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func (l *grpcListener) Addr() net.Addr {
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return l.addr
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}
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