github.com/Uhtred009/v2ray-core-1@v4.31.2+incompatible/app/commander/commander.go (about)

     1  // +build !confonly
     2  
     3  package commander
     4  
     5  //go:generate go run v2ray.com/core/common/errors/errorgen
     6  
     7  import (
     8  	"context"
     9  	"net"
    10  	"sync"
    11  
    12  	"google.golang.org/grpc"
    13  
    14  	"v2ray.com/core"
    15  	"v2ray.com/core/common"
    16  	"v2ray.com/core/common/signal/done"
    17  	"v2ray.com/core/features/outbound"
    18  )
    19  
    20  // Commander is a V2Ray feature that provides gRPC methods to external clients.
    21  type Commander struct {
    22  	sync.Mutex
    23  	server   *grpc.Server
    24  	services []Service
    25  	ohm      outbound.Manager
    26  	tag      string
    27  }
    28  
    29  // NewCommander creates a new Commander based on the given config.
    30  func NewCommander(ctx context.Context, config *Config) (*Commander, error) {
    31  	c := &Commander{
    32  		tag: config.Tag,
    33  	}
    34  
    35  	common.Must(core.RequireFeatures(ctx, func(om outbound.Manager) {
    36  		c.ohm = om
    37  	}))
    38  
    39  	for _, rawConfig := range config.Service {
    40  		config, err := rawConfig.GetInstance()
    41  		if err != nil {
    42  			return nil, err
    43  		}
    44  		rawService, err := common.CreateObject(ctx, config)
    45  		if err != nil {
    46  			return nil, err
    47  		}
    48  		service, ok := rawService.(Service)
    49  		if !ok {
    50  			return nil, newError("not a Service.")
    51  		}
    52  		c.services = append(c.services, service)
    53  	}
    54  
    55  	return c, nil
    56  }
    57  
    58  // Type implements common.HasType.
    59  func (c *Commander) Type() interface{} {
    60  	return (*Commander)(nil)
    61  }
    62  
    63  // Start implements common.Runnable.
    64  func (c *Commander) Start() error {
    65  	c.Lock()
    66  	c.server = grpc.NewServer()
    67  	for _, service := range c.services {
    68  		service.Register(c.server)
    69  	}
    70  	c.Unlock()
    71  
    72  	listener := &OutboundListener{
    73  		buffer: make(chan net.Conn, 4),
    74  		done:   done.New(),
    75  	}
    76  
    77  	go func() {
    78  		if err := c.server.Serve(listener); err != nil {
    79  			newError("failed to start grpc server").Base(err).AtError().WriteToLog()
    80  		}
    81  	}()
    82  
    83  	if err := c.ohm.RemoveHandler(context.Background(), c.tag); err != nil {
    84  		newError("failed to remove existing handler").WriteToLog()
    85  	}
    86  
    87  	return c.ohm.AddHandler(context.Background(), &Outbound{
    88  		tag:      c.tag,
    89  		listener: listener,
    90  	})
    91  }
    92  
    93  // Close implements common.Closable.
    94  func (c *Commander) Close() error {
    95  	c.Lock()
    96  	defer c.Unlock()
    97  
    98  	if c.server != nil {
    99  		c.server.Stop()
   100  		c.server = nil
   101  	}
   102  
   103  	return nil
   104  }
   105  
   106  func init() {
   107  	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, cfg interface{}) (interface{}, error) {
   108  		return NewCommander(ctx, cfg.(*Config))
   109  	}))
   110  }