Xray-core/transport/internet/grpc/dial.go

189 lines
6.1 KiB
Go

package grpc
import (
"context"
gonet "net"
"sync"
"time"
"github.com/xtls/xray-core/common"
c "github.com/xtls/xray-core/common/ctx"
"github.com/xtls/xray-core/common/errors"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/session"
"github.com/xtls/xray-core/transport/internet"
"github.com/xtls/xray-core/transport/internet/grpc/encoding"
"github.com/xtls/xray-core/transport/internet/reality"
"github.com/xtls/xray-core/transport/internet/stat"
"github.com/xtls/xray-core/transport/internet/tls"
"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"
)
func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
errors.LogInfo(ctx, "creating connection to ", dest)
conn, err := dialgRPC(ctx, dest, streamSettings)
if err != nil {
return nil, errors.New("failed to dial gRPC").Base(err)
}
return stat.Connection(conn), nil
}
func init() {
common.Must(internet.RegisterTransportDialer(protocolName, Dial))
}
type dialerConf struct {
net.Destination
*internet.MemoryStreamConfig
}
var (
globalDialerMap map[dialerConf]*grpc.ClientConn
globalDialerAccess sync.Mutex
)
func dialgRPC(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (net.Conn, error) {
grpcSettings := streamSettings.ProtocolSettings.(*Config)
conn, err := getGrpcClient(ctx, dest, streamSettings)
if err != nil {
return nil, errors.New("Cannot dial gRPC").Base(err)
}
client := encoding.NewGRPCServiceClient(conn)
if grpcSettings.MultiMode {
errors.LogDebug(ctx, "using gRPC multi mode service name: `" + grpcSettings.getServiceName() + "` stream name: `" + grpcSettings.getTunMultiStreamName() + "`")
grpcService, err := client.(encoding.GRPCServiceClientX).TunMultiCustomName(ctx, grpcSettings.getServiceName(), grpcSettings.getTunMultiStreamName())
if err != nil {
return nil, errors.New("Cannot dial gRPC").Base(err)
}
return encoding.NewMultiHunkConn(grpcService, nil), nil
}
errors.LogDebug(ctx, "using gRPC tun mode service name: `" + grpcSettings.getServiceName() + "` stream name: `" + grpcSettings.getTunStreamName() + "`")
grpcService, err := client.(encoding.GRPCServiceClientX).TunCustomName(ctx, grpcSettings.getServiceName(), grpcSettings.getTunStreamName())
if err != nil {
return nil, errors.New("Cannot dial gRPC").Base(err)
}
return encoding.NewHunkConn(grpcService, nil), nil
}
func getGrpcClient(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (*grpc.ClientConn, error) {
globalDialerAccess.Lock()
defer globalDialerAccess.Unlock()
if globalDialerMap == nil {
globalDialerMap = make(map[dialerConf]*grpc.ClientConn)
}
tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
realityConfig := reality.ConfigFromStreamSettings(streamSettings)
sockopt := streamSettings.SocketSettings
grpcSettings := streamSettings.ProtocolSettings.(*Config)
if client, found := globalDialerMap[dialerConf{dest, streamSettings}]; found && client.GetState() != connectivity.Shutdown {
return client, nil
}
dialOptions := []grpc.DialOption{
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,
}),
grpc.WithContextDialer(func(gctx context.Context, s string) (gonet.Conn, error) {
select {
case <-gctx.Done():
return nil, gctx.Err()
default:
}
rawHost, rawPort, err := net.SplitHostPort(s)
if err != nil {
return nil, err
}
if len(rawPort) == 0 {
rawPort = "443"
}
port, err := net.PortFromString(rawPort)
if err != nil {
return nil, err
}
address := net.ParseAddress(rawHost)
gctx = c.ContextWithID(gctx, c.IDFromContext(ctx))
gctx = session.ContextWithOutbounds(gctx, session.OutboundsFromContext(ctx))
gctx = session.ContextWithTimeoutOnly(gctx, true)
c, err := internet.DialSystem(gctx, net.TCPDestination(address, port), sockopt)
if err == nil {
if tlsConfig != nil {
config := tlsConfig.GetTLSConfig()
if config.ServerName == "" && address.Family().IsDomain() {
config.ServerName = address.Domain()
}
if fingerprint := tls.GetFingerprint(tlsConfig.Fingerprint); fingerprint != nil {
return tls.UClient(c, config, fingerprint), nil
} else { // Fallback to normal gRPC TLS
return tls.Client(c, config), nil
}
}
if realityConfig != nil {
return reality.UClient(c, realityConfig, gctx, dest)
}
}
return c, err
}),
}
dialOptions = append(dialOptions, grpc.WithTransportCredentials(insecure.NewCredentials()))
authority := ""
if grpcSettings.Authority != "" {
authority = grpcSettings.Authority
} else if tlsConfig != nil && tlsConfig.ServerName != "" {
authority = tlsConfig.ServerName
} else if realityConfig == nil && dest.Address.Family().IsDomain() {
authority = dest.Address.Domain()
}
dialOptions = append(dialOptions, grpc.WithAuthority(authority))
if grpcSettings.IdleTimeout > 0 || grpcSettings.HealthCheckTimeout > 0 || grpcSettings.PermitWithoutStream {
dialOptions = append(dialOptions, grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: time.Second * time.Duration(grpcSettings.IdleTimeout),
Timeout: time.Second * time.Duration(grpcSettings.HealthCheckTimeout),
PermitWithoutStream: grpcSettings.PermitWithoutStream,
}))
}
if grpcSettings.InitialWindowsSize > 0 {
dialOptions = append(dialOptions, grpc.WithInitialWindowSize(grpcSettings.InitialWindowsSize))
}
if grpcSettings.UserAgent != "" {
dialOptions = append(dialOptions, grpc.WithUserAgent(grpcSettings.UserAgent))
}
var grpcDestHost string
if dest.Address.Family().IsDomain() {
grpcDestHost = dest.Address.Domain()
} else {
grpcDestHost = dest.Address.IP().String()
}
conn, err := grpc.Dial(
gonet.JoinHostPort(grpcDestHost, dest.Port.String()),
dialOptions...,
)
globalDialerMap[dialerConf{dest, streamSettings}] = conn
return conn, err
}