mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-09-20 02:27:50 +00:00
104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
package route
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import (
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"context"
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"net"
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"github.com/oschwald/geoip2-golang"
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"github.com/sagernet/sing-box/adapter"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing/common"
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N "github.com/sagernet/sing/common/network"
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)
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var _ adapter.Router = (*Router)(nil)
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type Router struct {
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logger log.Logger
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defaultOutbound adapter.Outbound
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outboundByTag map[string]adapter.Outbound
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rules []adapter.Rule
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geoReader *geoip2.Reader
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}
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func NewRouter(logger log.Logger) *Router {
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return &Router{
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logger: logger.WithPrefix("router: "),
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outboundByTag: make(map[string]adapter.Outbound),
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}
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}
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func (r *Router) DefaultOutbound() adapter.Outbound {
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if r.defaultOutbound == nil {
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panic("missing default outbound")
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}
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return r.defaultOutbound
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}
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func (r *Router) Outbound(tag string) (adapter.Outbound, bool) {
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outbound, loaded := r.outboundByTag[tag]
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return outbound, loaded
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}
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func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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for _, rule := range r.rules {
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if rule.Match(metadata) {
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r.logger.WithContext(ctx).Info("match ", rule.String())
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if outbound, loaded := r.Outbound(rule.Outbound()); loaded {
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return outbound.NewConnection(ctx, conn, metadata.Destination)
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}
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r.logger.WithContext(ctx).Error("outbound ", rule.Outbound(), " not found")
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}
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}
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r.logger.WithContext(ctx).Info("no match => ", r.defaultOutbound.Tag())
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return r.defaultOutbound.NewConnection(ctx, conn, metadata.Destination)
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}
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func (r *Router) RoutePacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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for _, rule := range r.rules {
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if rule.Match(metadata) {
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r.logger.WithContext(ctx).Info("match ", rule.String())
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if outbound, loaded := r.Outbound(rule.Outbound()); loaded {
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return outbound.NewPacketConnection(ctx, conn, metadata.Destination)
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}
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r.logger.WithContext(ctx).Error("outbound ", rule.Outbound(), " not found")
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}
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}
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r.logger.WithContext(ctx).Info("no match => ", r.defaultOutbound.Tag())
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return r.defaultOutbound.NewPacketConnection(ctx, conn, metadata.Destination)
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}
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func (r *Router) Close() error {
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return common.Close(
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common.PtrOrNil(r.geoReader),
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)
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}
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func (r *Router) UpdateOutbounds(outbounds []adapter.Outbound) {
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var defaultOutbound adapter.Outbound
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outboundByTag := make(map[string]adapter.Outbound)
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if len(outbounds) > 0 {
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defaultOutbound = outbounds[0]
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}
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for _, outbound := range outbounds {
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outboundByTag[outbound.Tag()] = outbound
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}
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r.defaultOutbound = defaultOutbound
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r.outboundByTag = outboundByTag
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}
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func (r *Router) UpdateRules(options []option.Rule) error {
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rules := make([]adapter.Rule, 0, len(options))
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for i, rule := range options {
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switch rule.Type {
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case "", C.RuleTypeDefault:
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rules = append(rules, NewDefaultRule(i, rule.DefaultOptions))
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}
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}
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r.rules = rules
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return nil
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}
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