Add SSM API service

service/ssmapi/server.go

@@ -0,0 +1,117 @@
+package ssmapi
+
+import (
+	"context"
+	"errors"
+	"net/http"
+
+	"github.com/sagernet/sing-box/adapter"
+	boxService "github.com/sagernet/sing-box/adapter/service"
+	"github.com/sagernet/sing-box/common/listener"
+	"github.com/sagernet/sing-box/common/tls"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
+	E "github.com/sagernet/sing/common/exceptions"
+	N "github.com/sagernet/sing/common/network"
+	aTLS "github.com/sagernet/sing/common/tls"
+	"github.com/sagernet/sing/service"
+
+	"github.com/go-chi/chi/v5"
+	"golang.org/x/net/http2"
+)
+
+func RegisterService(registry *boxService.Registry) {
+	boxService.Register[option.SSMAPIServiceOptions](registry, C.TypeSSMAPI, NewService)
+}
+
+type Service struct {
+	boxService.Adapter
+	ctx        context.Context
+	logger     log.ContextLogger
+	listener   *listener.Listener
+	tlsConfig  tls.ServerConfig
+	httpServer *http.Server
+}
+
+func NewService(ctx context.Context, logger log.ContextLogger, tag string, options option.SSMAPIServiceOptions) (adapter.Service, error) {
+	chiRouter := chi.NewRouter()
+	s := &Service{
+		Adapter: boxService.NewAdapter(C.TypeSSMAPI, tag),
+		ctx:     ctx,
+		logger:  logger,
+		listener: listener.New(listener.Options{
+			Context: ctx,
+			Logger:  logger,
+			Network: []string{N.NetworkTCP},
+			Listen:  options.ListenOptions,
+		}),
+		httpServer: &http.Server{
+			Handler: chiRouter,
+		},
+	}
+	inboundManager := service.FromContext[adapter.InboundManager](ctx)
+	if options.Servers.Size() == 0 {
+		return nil, E.New("missing servers")
+	}
+	for i, entry := range options.Servers.Entries() {
+		inbound, loaded := inboundManager.Get(entry.Value)
+		if !loaded {
+			return nil, E.New("parse SSM server[", i, "]: inbound ", entry.Value, " not found")
+		}
+		managedServer, isManaged := inbound.(adapter.ManagedSSMServer)
+		if !isManaged {
+			return nil, E.New("parse SSM server[", i, "]: inbound/", inbound.Type(), "[", inbound.Tag(), "] is not a SSM server")
+		}
+		traffic := NewTrafficManager()
+		managedServer.SetTracker(traffic)
+		user := NewUserManager(managedServer, traffic)
+		chiRouter.Route(entry.Key, NewAPIServer(logger, traffic, user).Route)
+	}
+	if options.TLS != nil {
+		tlsConfig, err := tls.NewServer(ctx, logger, common.PtrValueOrDefault(options.TLS))
+		if err != nil {
+			return nil, err
+		}
+		s.tlsConfig = tlsConfig
+	}
+	return s, nil
+}
+
+func (s *Service) Start(stage adapter.StartStage) error {
+	if stage != adapter.StartStateStart {
+		return nil
+	}
+	if s.tlsConfig != nil {
+		err := s.tlsConfig.Start()
+		if err != nil {
+			return E.Cause(err, "create TLS config")
+		}
+	}
+	tcpListener, err := s.listener.ListenTCP()
+	if err != nil {
+		return err
+	}
+	if s.tlsConfig != nil {
+		if !common.Contains(s.tlsConfig.NextProtos(), http2.NextProtoTLS) {
+			s.tlsConfig.SetNextProtos(append([]string{"h2"}, s.tlsConfig.NextProtos()...))
+		}
+		tcpListener = aTLS.NewListener(tcpListener, s.tlsConfig)
+	}
+	go func() {
+		err = s.httpServer.Serve(tcpListener)
+		if err != nil && !errors.Is(err, http.ErrServerClosed) {
+			s.logger.Error("serve error: ", err)
+		}
+	}()
+	return nil
+}
+
+func (s *Service) Close() error {
+	return common.Close(
+		common.PtrOrNil(s.httpServer),
+		common.PtrOrNil(s.listener),
+		s.tlsConfig,
+	)
+}