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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,133 @@ | ||
package outbound | ||
|
||
import ( | ||
"context" | ||
"net" | ||
|
||
"github.com/sagernet/sing-box/adapter" | ||
"github.com/sagernet/sing-box/common/dialer" | ||
"github.com/sagernet/sing-box/common/interrupt" | ||
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" | ||
M "github.com/sagernet/sing/common/metadata" | ||
N "github.com/sagernet/sing/common/network" | ||
) | ||
|
||
var ( | ||
_ adapter.Outbound = (*Relay)(nil) | ||
_ adapter.OutboundGroup = (*Relay)(nil) | ||
_ adapter.RelayGroup = (*Relay)(nil) | ||
) | ||
|
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type Relay struct { | ||
myOutboundAdapter | ||
tags []string | ||
interruptGroup *interrupt.Group | ||
interruptExternalConnections bool | ||
} | ||
|
||
func NewRelay(router adapter.Router, logger log.ContextLogger, tag string, options option.RelayOutboundOptions) (*Relay, error) { | ||
outbound := &Relay{ | ||
myOutboundAdapter: myOutboundAdapter{ | ||
protocol: C.TypeRelay, | ||
router: router, | ||
logger: logger, | ||
tag: tag, | ||
dependencies: options.Outbounds, | ||
}, | ||
tags: options.Outbounds, | ||
interruptGroup: interrupt.NewGroup(), | ||
interruptExternalConnections: options.InterruptExistConnections, | ||
} | ||
if len(outbound.tags) == 0 { | ||
return nil, E.New("missing tags") | ||
} | ||
return outbound, nil | ||
} | ||
|
||
func (r *Relay) Network() []string { | ||
detour, _ := r.router.Outbound(r.tags[0]) | ||
return detour.Network() | ||
} | ||
|
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func (r *Relay) Start() error { | ||
for i, tag := range r.tags { | ||
outbound, loaded := r.router.Outbound(tag) | ||
if !loaded { | ||
return E.New("outbound ", i, " not found: ", tag) | ||
} | ||
if _, isRelay := outbound.(adapter.RelayGroup); isRelay { | ||
return E.New("relay outbound invalid: ", tag) | ||
} | ||
} | ||
return nil | ||
} | ||
|
||
func (r *Relay) Now() string { | ||
return "" | ||
} | ||
|
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func (r *Relay) All() []string { | ||
return r.tags | ||
} | ||
|
||
func (s *Relay) UpdateOutbounds(tag string) error { | ||
return nil | ||
} | ||
|
||
func (s *Relay) IsRelay() bool { | ||
return true | ||
} | ||
|
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func (r *Relay) SelectedOutbound(network string) adapter.Outbound { | ||
detour, _ := r.router.Outbound(r.tags[len(r.tags)-1]) | ||
return detour | ||
} | ||
|
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func (r *Relay) createRelayChain(network string) adapter.Outbound { | ||
len := len(r.tags) | ||
detour, _ := r.router.Outbound(r.tags[0]) | ||
tag := RealOutboundTag(detour, network) | ||
detour, _ = r.router.OutboundWithProvider(tag) | ||
for i := 1; i < len; i++ { | ||
out, _ := r.router.Outbound(r.tags[i]) | ||
tag := RealOutboundTag(out, network) | ||
out, _ = r.router.OutboundWithProvider(tag) | ||
outbound := out.(adapter.OutboundRelay) | ||
d := dialer.NewDetourWithDialer(r.router, detour) | ||
detour = outbound.SetRelay(d) | ||
} | ||
return detour | ||
} | ||
|
||
func (r *Relay) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) { | ||
detour := r.createRelayChain(network) | ||
conn, err := detour.DialContext(ctx, network, destination) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return r.interruptGroup.NewConn(conn, interrupt.IsExternalConnectionFromContext(ctx)), nil | ||
} | ||
|
||
func (r *Relay) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) { | ||
detour := r.createRelayChain(N.NetworkUDP) | ||
conn, err := detour.ListenPacket(ctx, destination) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return r.interruptGroup.NewPacketConn(conn, interrupt.IsExternalConnectionFromContext(ctx)), nil | ||
} | ||
|
||
func (r *Relay) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error { | ||
detour := r.createRelayChain(metadata.Network) | ||
ctx = interrupt.ContextWithIsExternalConnection(ctx) | ||
return detour.NewConnection(ctx, conn, metadata) | ||
} | ||
|
||
func (r *Relay) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error { | ||
detour := r.createRelayChain(metadata.Network) | ||
ctx = interrupt.ContextWithIsExternalConnection(ctx) | ||
return detour.NewPacketConnection(ctx, conn, metadata) | ||
} |
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