github.com/xraypb/Xray-core@v1.8.1/app/commander/commander.go (about)

     1  package commander
     2  
     3  //go:generate go run github.com/xraypb/Xray-core/common/errors/errorgen
     4  
     5  import (
     6  	"context"
     7  	"net"
     8  	"sync"
     9  
    10  	"github.com/xraypb/Xray-core/common"
    11  	"github.com/xraypb/Xray-core/common/signal/done"
    12  	core "github.com/xraypb/Xray-core/core"
    13  	"github.com/xraypb/Xray-core/features/outbound"
    14  	"google.golang.org/grpc"
    15  )
    16  
    17  // Commander is a Xray feature that provides gRPC methods to external clients.
    18  type Commander struct {
    19  	sync.Mutex
    20  	server   *grpc.Server
    21  	services []Service
    22  	ohm      outbound.Manager
    23  	tag      string
    24  }
    25  
    26  // NewCommander creates a new Commander based on the given config.
    27  func NewCommander(ctx context.Context, config *Config) (*Commander, error) {
    28  	c := &Commander{
    29  		tag: config.Tag,
    30  	}
    31  
    32  	common.Must(core.RequireFeatures(ctx, func(om outbound.Manager) {
    33  		c.ohm = om
    34  	}))
    35  
    36  	for _, rawConfig := range config.Service {
    37  		config, err := rawConfig.GetInstance()
    38  		if err != nil {
    39  			return nil, err
    40  		}
    41  		rawService, err := common.CreateObject(ctx, config)
    42  		if err != nil {
    43  			return nil, err
    44  		}
    45  		service, ok := rawService.(Service)
    46  		if !ok {
    47  			return nil, newError("not a Service.")
    48  		}
    49  		c.services = append(c.services, service)
    50  	}
    51  
    52  	return c, nil
    53  }
    54  
    55  // Type implements common.HasType.
    56  func (c *Commander) Type() interface{} {
    57  	return (*Commander)(nil)
    58  }
    59  
    60  // Start implements common.Runnable.
    61  func (c *Commander) Start() error {
    62  	c.Lock()
    63  	c.server = grpc.NewServer()
    64  	for _, service := range c.services {
    65  		service.Register(c.server)
    66  	}
    67  	c.Unlock()
    68  
    69  	listener := &OutboundListener{
    70  		buffer: make(chan net.Conn, 4),
    71  		done:   done.New(),
    72  	}
    73  
    74  	go func() {
    75  		if err := c.server.Serve(listener); err != nil {
    76  			newError("failed to start grpc server").Base(err).AtError().WriteToLog()
    77  		}
    78  	}()
    79  
    80  	if err := c.ohm.RemoveHandler(context.Background(), c.tag); err != nil {
    81  		newError("failed to remove existing handler").WriteToLog()
    82  	}
    83  
    84  	return c.ohm.AddHandler(context.Background(), &Outbound{
    85  		tag:      c.tag,
    86  		listener: listener,
    87  	})
    88  }
    89  
    90  // Close implements common.Closable.
    91  func (c *Commander) Close() error {
    92  	c.Lock()
    93  	defer c.Unlock()
    94  
    95  	if c.server != nil {
    96  		c.server.Stop()
    97  		c.server = nil
    98  	}
    99  
   100  	return nil
   101  }
   102  
   103  func init() {
   104  	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, cfg interface{}) (interface{}, error) {
   105  		return NewCommander(ctx, cfg.(*Config))
   106  	}))
   107  }