mirror of
https://github.com/SagerNet/sing-box.git
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120 lines
3.3 KiB
Go
120 lines
3.3 KiB
Go
package v2raygrpc
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import (
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"context"
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"net"
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"sync"
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"time"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/tls"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing/common"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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"golang.org/x/net/http2"
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"google.golang.org/grpc"
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"google.golang.org/grpc/backoff"
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"google.golang.org/grpc/connectivity"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/grpc/keepalive"
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)
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var _ adapter.V2RayClientTransport = (*Client)(nil)
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type Client struct {
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ctx context.Context
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dialer N.Dialer
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serverAddr string
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serviceName string
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dialOptions []grpc.DialOption
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conn *grpc.ClientConn
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connAccess sync.Mutex
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}
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func NewClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayGRPCOptions, tlsConfig tls.Config) (adapter.V2RayClientTransport, error) {
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var dialOptions []grpc.DialOption
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if tlsConfig != nil {
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if len(tlsConfig.NextProtos()) == 0 {
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tlsConfig.SetNextProtos([]string{http2.NextProtoTLS})
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}
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dialOptions = append(dialOptions, grpc.WithTransportCredentials(NewTLSTransportCredentials(tlsConfig)))
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} else {
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dialOptions = append(dialOptions, grpc.WithTransportCredentials(insecure.NewCredentials()))
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}
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if options.IdleTimeout > 0 {
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dialOptions = append(dialOptions, grpc.WithKeepaliveParams(keepalive.ClientParameters{
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Time: time.Duration(options.IdleTimeout),
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Timeout: time.Duration(options.PingTimeout),
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PermitWithoutStream: options.PermitWithoutStream,
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}))
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}
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dialOptions = append(dialOptions, grpc.WithConnectParams(grpc.ConnectParams{
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Backoff: backoff.Config{
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BaseDelay: 500 * time.Millisecond,
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Multiplier: 1.5,
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Jitter: 0.2,
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MaxDelay: 19 * time.Second,
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},
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MinConnectTimeout: 5 * time.Second,
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}))
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dialOptions = append(dialOptions, grpc.WithContextDialer(func(ctx context.Context, server string) (net.Conn, error) {
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return dialer.DialContext(ctx, N.NetworkTCP, M.ParseSocksaddr(server))
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}))
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dialOptions = append(dialOptions, grpc.WithReturnConnectionError())
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return &Client{
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ctx: ctx,
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dialer: dialer,
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serverAddr: serverAddr.String(),
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serviceName: options.ServiceName,
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dialOptions: dialOptions,
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}, nil
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}
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func (c *Client) connect() (*grpc.ClientConn, error) {
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conn := c.conn
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if conn != nil && conn.GetState() != connectivity.Shutdown {
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return conn, nil
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}
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c.connAccess.Lock()
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defer c.connAccess.Unlock()
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conn = c.conn
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if conn != nil && conn.GetState() != connectivity.Shutdown {
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return conn, nil
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}
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//nolint:staticcheck
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//goland:noinspection GoDeprecation
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conn, err := grpc.DialContext(c.ctx, c.serverAddr, c.dialOptions...)
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if err != nil {
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return nil, err
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}
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c.conn = conn
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return conn, nil
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}
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func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
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clientConn, err := c.connect()
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if err != nil {
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return nil, err
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}
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client := NewGunServiceClient(clientConn).(GunServiceCustomNameClient)
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ctx, cancel := common.ContextWithCancelCause(ctx)
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stream, err := client.TunCustomName(ctx, c.serviceName)
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if err != nil {
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cancel(err)
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return nil, err
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}
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return NewGRPCConn(stream), nil
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}
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func (c *Client) Close() error {
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c.connAccess.Lock()
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defer c.connAccess.Unlock()
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if c.conn != nil {
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c.conn.Close()
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c.conn = nil
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}
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return nil
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}
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