mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-12-27 20:45:52 +08:00
114 lines
3.2 KiB
Go
114 lines
3.2 KiB
Go
package v2raygrpc
|
|
|
|
import (
|
|
"context"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/sagernet/sing-box/adapter"
|
|
"github.com/sagernet/sing-box/common/tls"
|
|
"github.com/sagernet/sing-box/option"
|
|
"github.com/sagernet/sing/common"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
N "github.com/sagernet/sing/common/network"
|
|
|
|
"golang.org/x/net/http2"
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/backoff"
|
|
"google.golang.org/grpc/connectivity"
|
|
"google.golang.org/grpc/credentials/insecure"
|
|
"google.golang.org/grpc/keepalive"
|
|
)
|
|
|
|
var _ adapter.V2RayClientTransport = (*Client)(nil)
|
|
|
|
type Client struct {
|
|
ctx context.Context
|
|
dialer N.Dialer
|
|
serverAddr string
|
|
serviceName string
|
|
dialOptions []grpc.DialOption
|
|
conn *grpc.ClientConn
|
|
connAccess sync.Mutex
|
|
}
|
|
|
|
func NewClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayGRPCOptions, tlsConfig tls.Config) (adapter.V2RayClientTransport, error) {
|
|
var dialOptions []grpc.DialOption
|
|
if tlsConfig != nil {
|
|
if len(tlsConfig.NextProtos()) == 0 {
|
|
tlsConfig.SetNextProtos([]string{http2.NextProtoTLS})
|
|
}
|
|
dialOptions = append(dialOptions, grpc.WithTransportCredentials(NewTLSTransportCredentials(tlsConfig)))
|
|
} else {
|
|
dialOptions = append(dialOptions, grpc.WithTransportCredentials(insecure.NewCredentials()))
|
|
}
|
|
if options.IdleTimeout > 0 {
|
|
dialOptions = append(dialOptions, grpc.WithKeepaliveParams(keepalive.ClientParameters{
|
|
Time: time.Duration(options.IdleTimeout),
|
|
Timeout: time.Duration(options.PingTimeout),
|
|
PermitWithoutStream: options.PermitWithoutStream,
|
|
}))
|
|
}
|
|
dialOptions = append(dialOptions, grpc.WithConnectParams(grpc.ConnectParams{
|
|
Backoff: backoff.Config{
|
|
BaseDelay: 500 * time.Millisecond,
|
|
Multiplier: 1.5,
|
|
Jitter: 0.2,
|
|
MaxDelay: 19 * time.Second,
|
|
},
|
|
MinConnectTimeout: 5 * time.Second,
|
|
}))
|
|
dialOptions = append(dialOptions, grpc.WithContextDialer(func(ctx context.Context, server string) (net.Conn, error) {
|
|
return dialer.DialContext(ctx, N.NetworkTCP, M.ParseSocksaddr(server))
|
|
}))
|
|
dialOptions = append(dialOptions, grpc.WithReturnConnectionError())
|
|
return &Client{
|
|
ctx: ctx,
|
|
dialer: dialer,
|
|
serverAddr: serverAddr.String(),
|
|
serviceName: options.ServiceName,
|
|
dialOptions: dialOptions,
|
|
}, nil
|
|
}
|
|
|
|
func (c *Client) Close() error {
|
|
return common.Close(
|
|
common.PtrOrNil(c.conn),
|
|
)
|
|
}
|
|
|
|
func (c *Client) connect() (*grpc.ClientConn, error) {
|
|
conn := c.conn
|
|
if conn != nil && conn.GetState() != connectivity.Shutdown {
|
|
return conn, nil
|
|
}
|
|
c.connAccess.Lock()
|
|
defer c.connAccess.Unlock()
|
|
conn = c.conn
|
|
if conn != nil && conn.GetState() != connectivity.Shutdown {
|
|
return conn, nil
|
|
}
|
|
conn, err := grpc.DialContext(c.ctx, c.serverAddr, c.dialOptions...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
c.conn = conn
|
|
return conn, nil
|
|
}
|
|
|
|
func (c *Client) DialContext(ctx context.Context) (net.Conn, error) {
|
|
clientConn, err := c.connect()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
client := NewGunServiceClient(clientConn).(GunServiceCustomNameClient)
|
|
ctx, cancel := common.ContextWithCancelCause(ctx)
|
|
stream, err := client.TunCustomName(ctx, c.serviceName)
|
|
if err != nil {
|
|
cancel(err)
|
|
return nil, err
|
|
}
|
|
return NewGRPCConn(stream, cancel), nil
|
|
}
|