Add admin panel, manager, node_manager, bandwidth limiter, connection limiter, bonding, failover, vless encryption, mkcp transport

protocol/group/failover.go

@@ -0,0 +1,96 @@
+package group
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/outbound"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/service"
+)
+
+func RegisterFailover(registry *outbound.Registry) {
+	outbound.Register[option.FailoverOutboundOptions](registry, C.TypeFailover, NewFailover)
+}
+
+var (
+	_ adapter.OutboundGroup = (*Failover)(nil)
+)
+
+type Failover struct {
+	outbound.Adapter
+	ctx       context.Context
+	outbound  adapter.OutboundManager
+	logger    logger.ContextLogger
+	tags      []string
+	outbounds map[string]adapter.Outbound
+}
+
+func NewFailover(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.FailoverOutboundOptions) (adapter.Outbound, error) {
+	if len(options.Outbounds) == 0 {
+		return nil, E.New("missing tags")
+	}
+	outbound := &Failover{
+		Adapter:   outbound.NewAdapter(C.TypeFailover, tag, []string{N.NetworkTCP, N.NetworkUDP}, options.Outbounds),
+		ctx:       ctx,
+		outbound:  service.FromContext[adapter.OutboundManager](ctx),
+		logger:    logger,
+		tags:      options.Outbounds,
+		outbounds: make(map[string]adapter.Outbound, len(options.Outbounds)),
+	}
+	return outbound, nil
+}
+
+func (s *Failover) Start() error {
+	for i, tag := range s.tags {
+		outbound, loaded := s.outbound.Outbound(tag)
+		if !loaded {
+			return E.New("outbound ", i, " not found: ", tag)
+		}
+		s.outbounds[tag] = outbound
+	}
+	return nil
+}
+
+func (s *Failover) Now() string {
+	return s.tags[0]
+}
+
+func (s *Failover) All() []string {
+	return s.tags
+}
+
+func (s *Failover) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	var conn net.Conn
+	var err error
+	for _, outbound := range s.outbounds {
+		conn, err = outbound.DialContext(ctx, network, destination)
+		if err != nil {
+			s.logger.ErrorContext(ctx, err)
+			continue
+		}
+		return conn, nil
+	}
+	return nil, err
+}
+
+func (s *Failover) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	var conn net.PacketConn
+	var err error
+	for _, outbound := range s.outbounds {
+		conn, err = outbound.ListenPacket(ctx, destination)
+		if err != nil {
+			s.logger.ErrorContext(ctx, err)
+			continue
+		}
+		return conn, nil
+	}
+	return nil, err
+}