sing-box/inbound/shadowsocks_relay.go
2022-07-06 15:01:09 +08:00

101 lines
3.6 KiB
Go

package inbound
import (
"context"
"net"
"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/buf"
F "github.com/sagernet/sing/common/format"
N "github.com/sagernet/sing/common/network"
"github.com/sagernet/sing-shadowsocks"
"github.com/sagernet/sing-shadowsocks/shadowaead_2022"
"github.com/sagernet/sing-box/adapter"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
)
var _ adapter.Inbound = (*ShadowsocksMulti)(nil)
type ShadowsocksRelay struct {
myInboundAdapter
service *shadowaead_2022.RelayService[int]
destinations []option.ShadowsocksDestination
}
func newShadowsocksRelay(ctx context.Context, router adapter.Router, logger log.Logger, tag string, options option.ShadowsocksInboundOptions) (*ShadowsocksRelay, error) {
inbound := &ShadowsocksRelay{
myInboundAdapter: myInboundAdapter{
protocol: C.TypeShadowsocks,
network: options.Network.Build(),
ctx: ctx,
router: router,
logger: logger,
tag: tag,
listenOptions: options.ListenOptions,
},
destinations: options.Destinations,
}
inbound.connHandler = inbound
inbound.packetHandler = inbound
var udpTimeout int64
if options.UDPTimeout != 0 {
udpTimeout = options.UDPTimeout
} else {
udpTimeout = 300
}
service, err := shadowaead_2022.NewRelayServiceWithPassword[int](
options.Method,
options.Password,
udpTimeout,
adapter.NewUpstreamContextHandler(inbound.newConnection, inbound.newPacketConnection, inbound),
)
if err != nil {
return nil, err
}
err = service.UpdateUsersWithPasswords(common.MapIndexed(options.Destinations, func(index int, user option.ShadowsocksDestination) int {
return index
}), common.Map(options.Destinations, func(user option.ShadowsocksDestination) string {
return user.Password
}), common.Map(options.Destinations, option.ShadowsocksDestination.Build))
if err != nil {
return nil, err
}
inbound.service = service
inbound.packetUpstream = service
return inbound, err
}
func (h *ShadowsocksRelay) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
return h.service.NewConnection(adapter.ContextWithMetadata(log.ContextWithID(ctx), metadata), conn, adapter.UpstreamMetadata(metadata))
}
func (h *ShadowsocksRelay) NewPacket(ctx context.Context, conn N.PacketConn, buffer *buf.Buffer, metadata adapter.InboundContext) error {
return h.service.NewPacket(adapter.ContextWithMetadata(log.ContextWithID(ctx), metadata), conn, buffer, adapter.UpstreamMetadata(metadata))
}
func (h *ShadowsocksRelay) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
userCtx := ctx.(*shadowsocks.UserContext[int])
destination := h.destinations[userCtx.User].Name
if destination == "" {
destination = F.ToString(userCtx.User)
}
h.logger.WithContext(ctx).Info("[", destination, "] inbound connection to ", metadata.Destination)
return h.router.RouteConnection(ctx, conn, metadata)
}
func (h *ShadowsocksRelay) newPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
userCtx := ctx.(*shadowsocks.UserContext[int])
destination := h.destinations[userCtx.User].Name
if destination == "" {
destination = F.ToString(userCtx.User)
}
ctx = log.ContextWithID(ctx)
h.logger.WithContext(ctx).Info("[", destination, "] inbound packet connection from ", metadata.Source)
h.logger.WithContext(ctx).Info("[", destination, "] inbound packet connection to ", metadata.Destination)
return h.router.RoutePacketConnection(ctx, conn, metadata)
}