117 lines
3.1 KiB
Go
117 lines
3.1 KiB
Go
package v2raygrpclite
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import (
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"context"
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"io"
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"net"
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"net/http"
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"net/url"
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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-box/transport/v2rayhttp"
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E "github.com/sagernet/sing/common/exceptions"
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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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)
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var _ adapter.V2RayClientTransport = (*Client)(nil)
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var defaultClientHeader = http.Header{
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"Content-Type": []string{"application/grpc"},
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"User-Agent": []string{"grpc-go/1.48.0"},
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"TE": []string{"trailers"},
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}
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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 M.Socksaddr
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transport *http2.Transport
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options option.V2RayGRPCOptions
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url *url.URL
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host string
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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 {
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var host string
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if tlsConfig != nil && tlsConfig.ServerName() != "" {
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host = M.ParseSocksaddrHostPort(tlsConfig.ServerName(), serverAddr.Port).String()
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} else {
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host = serverAddr.String()
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}
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client := &Client{
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ctx: ctx,
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dialer: dialer,
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serverAddr: serverAddr,
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options: options,
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transport: &http2.Transport{
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ReadIdleTimeout: time.Duration(options.IdleTimeout),
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PingTimeout: time.Duration(options.PingTimeout),
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DisableCompression: true,
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},
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url: &url.URL{
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Scheme: "https",
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Host: serverAddr.String(),
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Path: "/" + options.ServiceName + "/Tun",
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RawPath: "/" + url.PathEscape(options.ServiceName) + "/Tun",
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},
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host: host,
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}
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if tlsConfig == nil {
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client.transport.DialTLSContext = func(ctx context.Context, network, addr string, cfg *tls.STDConfig) (net.Conn, error) {
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return dialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
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}
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} else {
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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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client.transport.DialTLSContext = func(ctx context.Context, network, addr string, cfg *tls.STDConfig) (net.Conn, error) {
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conn, err := dialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
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if err != nil {
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return nil, err
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}
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return tls.ClientHandshake(ctx, conn, tlsConfig)
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}
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}
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return client
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}
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func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
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pipeInReader, pipeInWriter := io.Pipe()
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request := &http.Request{
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Method: http.MethodPost,
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Body: pipeInReader,
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URL: c.url,
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Header: defaultClientHeader,
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Host: c.host,
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}
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request = request.WithContext(ctx)
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conn := newLateGunConn(pipeInWriter)
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go func() {
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response, err := c.transport.RoundTrip(request)
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if err != nil {
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conn.setup(nil, err)
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} else if response.StatusCode != 200 {
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response.Body.Close()
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conn.setup(nil, E.New("unexpected status: ", response.Status))
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} else {
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conn.setup(response.Body, nil)
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}
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}()
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return conn, nil
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}
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func (c *Client) Close() error {
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if c.transport != nil {
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v2rayhttp.CloseIdleConnections(c.transport)
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}
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return nil
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}
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