sing-box/route/router.go

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package route
import (
"context"
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"io"
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"net"
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"net/http"
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"net/netip"
"net/url"
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"os"
"os/user"
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"path/filepath"
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"strings"
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"time"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/dialer"
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"github.com/sagernet/sing-box/common/geoip"
"github.com/sagernet/sing-box/common/geosite"
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"github.com/sagernet/sing-box/common/mux"
"github.com/sagernet/sing-box/common/process"
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"github.com/sagernet/sing-box/common/sniff"
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"github.com/sagernet/sing-box/common/warning"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/experimental/libbox/platform"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-box/ntp"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing-dns"
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"github.com/sagernet/sing-tun"
"github.com/sagernet/sing-vmess"
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"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/buf"
"github.com/sagernet/sing/common/bufio"
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"github.com/sagernet/sing/common/control"
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E "github.com/sagernet/sing/common/exceptions"
F "github.com/sagernet/sing/common/format"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
"github.com/sagernet/sing/common/rw"
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"github.com/sagernet/sing/common/uot"
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)
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var warnDefaultInterfaceOnUnsupportedPlatform = warning.New(
func() bool {
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return !(C.IsLinux || C.IsWindows || C.IsDarwin)
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},
"route option `default_mark` is only supported on Linux and Windows",
)
var warnDefaultMarkOnNonLinux = warning.New(
func() bool {
return !C.IsLinux
},
"route option `default_mark` is only supported on Linux",
)
var warnFindProcessOnUnsupportedPlatform = warning.New(
func() bool {
return !(C.IsLinux || C.IsWindows || C.IsDarwin)
},
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"route option `find_process` is only supported on Linux, Windows, and macOS",
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)
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var _ adapter.Router = (*Router)(nil)
type Router struct {
ctx context.Context
logger log.ContextLogger
dnsLogger log.ContextLogger
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inboundByTag map[string]adapter.Inbound
outbounds []adapter.Outbound
outboundByTag map[string]adapter.Outbound
rules []adapter.Rule
defaultDetour string
defaultOutboundForConnection adapter.Outbound
defaultOutboundForPacketConnection adapter.Outbound
needGeoIPDatabase bool
needGeositeDatabase bool
geoIPOptions option.GeoIPOptions
geositeOptions option.GeositeOptions
geoIPReader *geoip.Reader
geositeReader *geosite.Reader
geositeCache map[string]adapter.Rule
dnsClient *dns.Client
defaultDomainStrategy dns.DomainStrategy
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dnsRules []adapter.DNSRule
defaultTransport dns.Transport
transports []dns.Transport
transportMap map[string]dns.Transport
transportDomainStrategy map[dns.Transport]dns.DomainStrategy
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interfaceFinder myInterfaceFinder
autoDetectInterface bool
defaultInterface string
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defaultMark int
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networkMonitor tun.NetworkUpdateMonitor
interfaceMonitor tun.DefaultInterfaceMonitor
packageManager tun.PackageManager
processSearcher process.Searcher
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timeService adapter.TimeService
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clashServer adapter.ClashServer
v2rayServer adapter.V2RayServer
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platformInterface platform.Interface
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}
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func NewRouter(
ctx context.Context,
logFactory log.Factory,
options option.RouteOptions,
dnsOptions option.DNSOptions,
ntpOptions option.NTPOptions,
inbounds []option.Inbound,
platformInterface platform.Interface,
) (*Router, error) {
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if options.DefaultInterface != "" {
warnDefaultInterfaceOnUnsupportedPlatform.Check()
}
if options.DefaultMark != 0 {
warnDefaultMarkOnNonLinux.Check()
}
if options.FindProcess {
warnFindProcessOnUnsupportedPlatform.Check()
}
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router := &Router{
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ctx: ctx,
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logger: logFactory.NewLogger("router"),
dnsLogger: logFactory.NewLogger("dns"),
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outboundByTag: make(map[string]adapter.Outbound),
rules: make([]adapter.Rule, 0, len(options.Rules)),
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dnsRules: make([]adapter.DNSRule, 0, len(dnsOptions.Rules)),
needGeoIPDatabase: hasRule(options.Rules, isGeoIPRule) || hasDNSRule(dnsOptions.Rules, isGeoIPDNSRule),
needGeositeDatabase: hasRule(options.Rules, isGeositeRule) || hasDNSRule(dnsOptions.Rules, isGeositeDNSRule),
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geoIPOptions: common.PtrValueOrDefault(options.GeoIP),
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geositeOptions: common.PtrValueOrDefault(options.Geosite),
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geositeCache: make(map[string]adapter.Rule),
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defaultDetour: options.Final,
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defaultDomainStrategy: dns.DomainStrategy(dnsOptions.Strategy),
autoDetectInterface: options.AutoDetectInterface,
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defaultInterface: options.DefaultInterface,
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defaultMark: options.DefaultMark,
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platformInterface: platformInterface,
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}
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router.dnsClient = dns.NewClient(dnsOptions.DNSClientOptions.DisableCache, dnsOptions.DNSClientOptions.DisableExpire, router.dnsLogger)
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for i, ruleOptions := range options.Rules {
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routeRule, err := NewRule(router, router.logger, ruleOptions)
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if err != nil {
return nil, E.Cause(err, "parse rule[", i, "]")
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}
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router.rules = append(router.rules, routeRule)
}
for i, dnsRuleOptions := range dnsOptions.Rules {
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dnsRule, err := NewDNSRule(router, router.logger, dnsRuleOptions)
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if err != nil {
return nil, E.Cause(err, "parse dns rule[", i, "]")
}
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router.dnsRules = append(router.dnsRules, dnsRule)
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}
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transports := make([]dns.Transport, len(dnsOptions.Servers))
dummyTransportMap := make(map[string]dns.Transport)
transportMap := make(map[string]dns.Transport)
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transportTags := make([]string, len(dnsOptions.Servers))
transportTagMap := make(map[string]bool)
transportDomainStrategy := make(map[dns.Transport]dns.DomainStrategy)
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for i, server := range dnsOptions.Servers {
var tag string
if server.Tag != "" {
tag = server.Tag
} else {
tag = F.ToString(i)
}
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if transportTagMap[tag] {
return nil, E.New("duplicate dns server tag: ", tag)
}
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transportTags[i] = tag
transportTagMap[tag] = true
}
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ctx = adapter.ContextWithRouter(ctx, router)
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for {
lastLen := len(dummyTransportMap)
for i, server := range dnsOptions.Servers {
tag := transportTags[i]
if _, exists := dummyTransportMap[tag]; exists {
continue
}
var detour N.Dialer
if server.Detour == "" {
detour = dialer.NewRouter(router)
} else {
detour = dialer.NewDetour(router, server.Detour)
}
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switch server.Address {
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case "local":
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default:
serverURL, _ := url.Parse(server.Address)
var serverAddress string
if serverURL != nil {
serverAddress = serverURL.Hostname()
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}
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if serverAddress == "" {
serverAddress = server.Address
}
_, notIpAddress := netip.ParseAddr(serverAddress)
if server.AddressResolver != "" {
if !transportTagMap[server.AddressResolver] {
return nil, E.New("parse dns server[", tag, "]: address resolver not found: ", server.AddressResolver)
}
if upstream, exists := dummyTransportMap[server.AddressResolver]; exists {
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detour = dns.NewDialerWrapper(detour, router.dnsClient, upstream, dns.DomainStrategy(server.AddressStrategy), time.Duration(server.AddressFallbackDelay))
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} else {
continue
}
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} else if notIpAddress != nil {
switch serverURL.Scheme {
case "rcode", "dhcp":
default:
return nil, E.New("parse dns server[", tag, "]: missing address_resolver")
}
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}
}
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transport, err := dns.CreateTransport(ctx, logFactory.NewLogger(F.ToString("dns/transport[", tag, "]")), detour, server.Address)
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if err != nil {
return nil, E.Cause(err, "parse dns server[", tag, "]")
}
transports[i] = transport
dummyTransportMap[tag] = transport
if server.Tag != "" {
transportMap[server.Tag] = transport
}
strategy := dns.DomainStrategy(server.Strategy)
if strategy != dns.DomainStrategyAsIS {
transportDomainStrategy[transport] = strategy
}
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}
if len(transports) == len(dummyTransportMap) {
break
}
if lastLen != len(dummyTransportMap) {
continue
}
unresolvedTags := common.MapIndexed(common.FilterIndexed(dnsOptions.Servers, func(index int, server option.DNSServerOptions) bool {
_, exists := dummyTransportMap[transportTags[index]]
return !exists
}), func(index int, server option.DNSServerOptions) string {
return transportTags[index]
})
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if len(unresolvedTags) == 0 {
panic(F.ToString("unexpected unresolved dns servers: ", len(transports), " ", len(dummyTransportMap), " ", len(transportMap)))
}
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return nil, E.New("found circular reference in dns servers: ", strings.Join(unresolvedTags, " "))
}
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var defaultTransport dns.Transport
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if dnsOptions.Final != "" {
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defaultTransport = dummyTransportMap[dnsOptions.Final]
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if defaultTransport == nil {
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return nil, E.New("default dns server not found: ", dnsOptions.Final)
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}
}
if defaultTransport == nil {
if len(transports) == 0 {
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transports = append(transports, dns.NewLocalTransport(N.SystemDialer))
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}
defaultTransport = transports[0]
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}
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router.defaultTransport = defaultTransport
router.transports = transports
router.transportMap = transportMap
router.transportDomainStrategy = transportDomainStrategy
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needInterfaceMonitor := platformInterface == nil && (options.AutoDetectInterface || common.Any(inbounds, func(inbound option.Inbound) bool {
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return inbound.HTTPOptions.SetSystemProxy || inbound.MixedOptions.SetSystemProxy || inbound.TunOptions.AutoRoute
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}))
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if needInterfaceMonitor {
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networkMonitor, err := tun.NewNetworkUpdateMonitor(router)
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if err == nil {
router.networkMonitor = networkMonitor
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networkMonitor.RegisterCallback(router.interfaceFinder.update)
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}
}
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if router.networkMonitor != nil && needInterfaceMonitor {
interfaceMonitor, err := tun.NewDefaultInterfaceMonitor(router.networkMonitor, tun.DefaultInterfaceMonitorOptions{
OverrideAndroidVPN: options.OverrideAndroidVPN,
})
if err != nil {
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return nil, E.New("auto_detect_interface unsupported on current platform")
}
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interfaceMonitor.RegisterCallback(router.notifyNetworkUpdate)
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router.interfaceMonitor = interfaceMonitor
}
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needFindProcess := hasRule(options.Rules, isProcessRule) || hasDNSRule(dnsOptions.Rules, isProcessDNSRule) || options.FindProcess
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needPackageManager := C.IsAndroid && platformInterface == nil && (needFindProcess || common.Any(inbounds, func(inbound option.Inbound) bool {
return len(inbound.TunOptions.IncludePackage) > 0 || len(inbound.TunOptions.ExcludePackage) > 0
}))
if needPackageManager {
packageManager, err := tun.NewPackageManager(router)
if err != nil {
return nil, E.Cause(err, "create package manager")
}
router.packageManager = packageManager
}
if needFindProcess {
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if platformInterface != nil {
router.processSearcher = platformInterface
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} else {
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searcher, err := process.NewSearcher(process.Config{
Logger: logFactory.NewLogger("router/process"),
PackageManager: router.packageManager,
})
if err != nil {
if err != os.ErrInvalid {
router.logger.Warn(E.Cause(err, "create process searcher"))
}
} else {
router.processSearcher = searcher
}
}
}
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if ntpOptions.Enabled {
router.timeService = ntp.NewService(ctx, router, logFactory.NewLogger("ntp"), ntpOptions)
}
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return router, nil
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}
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func (r *Router) Initialize(inbounds []adapter.Inbound, outbounds []adapter.Outbound, defaultOutbound func() adapter.Outbound) error {
inboundByTag := make(map[string]adapter.Inbound)
for _, inbound := range inbounds {
inboundByTag[inbound.Tag()] = inbound
}
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outboundByTag := make(map[string]adapter.Outbound)
for _, detour := range outbounds {
outboundByTag[detour.Tag()] = detour
}
var defaultOutboundForConnection adapter.Outbound
var defaultOutboundForPacketConnection adapter.Outbound
if r.defaultDetour != "" {
detour, loaded := outboundByTag[r.defaultDetour]
if !loaded {
return E.New("default detour not found: ", r.defaultDetour)
}
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if common.Contains(detour.Network(), N.NetworkTCP) {
defaultOutboundForConnection = detour
}
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if common.Contains(detour.Network(), N.NetworkUDP) {
defaultOutboundForPacketConnection = detour
}
}
var index, packetIndex int
if defaultOutboundForConnection == nil {
for i, detour := range outbounds {
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if common.Contains(detour.Network(), N.NetworkTCP) {
index = i
defaultOutboundForConnection = detour
break
}
}
}
if defaultOutboundForPacketConnection == nil {
for i, detour := range outbounds {
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if common.Contains(detour.Network(), N.NetworkUDP) {
packetIndex = i
defaultOutboundForPacketConnection = detour
break
}
}
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}
if defaultOutboundForConnection == nil || defaultOutboundForPacketConnection == nil {
detour := defaultOutbound()
if defaultOutboundForConnection == nil {
defaultOutboundForConnection = detour
}
if defaultOutboundForPacketConnection == nil {
defaultOutboundForPacketConnection = detour
}
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outbounds = append(outbounds, detour)
outboundByTag[detour.Tag()] = detour
}
if defaultOutboundForConnection != defaultOutboundForPacketConnection {
var description string
if defaultOutboundForConnection.Tag() != "" {
description = defaultOutboundForConnection.Tag()
} else {
description = F.ToString(index)
}
var packetDescription string
if defaultOutboundForPacketConnection.Tag() != "" {
packetDescription = defaultOutboundForPacketConnection.Tag()
} else {
packetDescription = F.ToString(packetIndex)
}
r.logger.Info("using ", defaultOutboundForConnection.Type(), "[", description, "] as default outbound for connection")
r.logger.Info("using ", defaultOutboundForPacketConnection.Type(), "[", packetDescription, "] as default outbound for packet connection")
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}
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r.inboundByTag = inboundByTag
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r.outbounds = outbounds
r.defaultOutboundForConnection = defaultOutboundForConnection
r.defaultOutboundForPacketConnection = defaultOutboundForPacketConnection
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r.outboundByTag = outboundByTag
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for i, rule := range r.rules {
if _, loaded := outboundByTag[rule.Outbound()]; !loaded {
return E.New("outbound not found for rule[", i, "]: ", rule.Outbound())
}
}
return nil
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}
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func (r *Router) Outbounds() []adapter.Outbound {
return r.outbounds
}
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func (r *Router) Start() error {
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if r.needGeoIPDatabase {
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err := r.prepareGeoIPDatabase()
if err != nil {
return err
}
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}
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if r.needGeositeDatabase {
err := r.prepareGeositeDatabase()
if err != nil {
return err
}
}
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if r.interfaceMonitor != nil {
err := r.interfaceMonitor.Start()
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if err != nil {
return err
}
}
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if r.networkMonitor != nil {
err := r.networkMonitor.Start()
if err != nil {
return err
}
}
if r.packageManager != nil {
err := r.packageManager.Start()
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if err != nil {
return err
}
}
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if r.needGeositeDatabase {
for _, rule := range r.rules {
err := rule.UpdateGeosite()
if err != nil {
r.logger.Error("failed to initialize geosite: ", err)
}
}
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for _, rule := range r.dnsRules {
err := rule.UpdateGeosite()
if err != nil {
r.logger.Error("failed to initialize geosite: ", err)
}
}
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err := common.Close(r.geositeReader)
if err != nil {
return err
}
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r.geositeCache = nil
r.geositeReader = nil
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}
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for i, rule := range r.rules {
err := rule.Start()
if err != nil {
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return E.Cause(err, "initialize rule[", i, "]")
}
}
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for i, rule := range r.dnsRules {
err := rule.Start()
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if err != nil {
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return E.Cause(err, "initialize DNS rule[", i, "]")
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}
}
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for i, transport := range r.transports {
err := transport.Start()
if err != nil {
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return E.Cause(err, "initialize DNS server[", i, "]")
}
}
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if r.timeService != nil {
err := r.timeService.Start()
if err != nil {
return E.Cause(err, "initialize time service")
}
}
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return nil
}
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func (r *Router) Close() error {
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for _, rule := range r.rules {
err := rule.Close()
if err != nil {
return err
}
}
for _, rule := range r.dnsRules {
err := rule.Close()
if err != nil {
return err
}
}
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for _, transport := range r.transports {
err := transport.Close()
if err != nil {
return err
}
}
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return common.Close(
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common.PtrOrNil(r.geoIPReader),
r.interfaceMonitor,
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r.networkMonitor,
r.packageManager,
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r.timeService,
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)
}
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func (r *Router) GeoIPReader() *geoip.Reader {
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return r.geoIPReader
}
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func (r *Router) LoadGeosite(code string) (adapter.Rule, error) {
rule, cached := r.geositeCache[code]
if cached {
return rule, nil
}
items, err := r.geositeReader.Read(code)
if err != nil {
return nil, err
}
rule, err = NewDefaultRule(r, nil, geosite.Compile(items))
if err != nil {
return nil, err
}
r.geositeCache[code] = rule
return rule, nil
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}
func (r *Router) Outbound(tag string) (adapter.Outbound, bool) {
outbound, loaded := r.outboundByTag[tag]
return outbound, loaded
}
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func (r *Router) DefaultOutbound(network string) adapter.Outbound {
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if network == N.NetworkTCP {
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return r.defaultOutboundForConnection
} else {
return r.defaultOutboundForPacketConnection
}
}
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func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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if metadata.InboundDetour != "" {
if metadata.LastInbound == metadata.InboundDetour {
return E.New("routing loop on detour: ", metadata.InboundDetour)
}
detour := r.inboundByTag[metadata.InboundDetour]
if detour == nil {
return E.New("inbound detour not found: ", metadata.InboundDetour)
}
injectable, isInjectable := detour.(adapter.InjectableInbound)
if !isInjectable {
return E.New("inbound detour is not injectable: ", metadata.InboundDetour)
}
if !common.Contains(injectable.Network(), N.NetworkTCP) {
return E.New("inject: TCP unsupported")
}
metadata.LastInbound = metadata.Inbound
metadata.Inbound = metadata.InboundDetour
metadata.InboundDetour = ""
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err := injectable.NewConnection(ctx, conn, metadata)
if err != nil {
return E.Cause(err, "inject ", detour.Tag())
}
return nil
}
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metadata.Network = N.NetworkTCP
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switch metadata.Destination.Fqdn {
case mux.Destination.Fqdn:
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r.logger.InfoContext(ctx, "inbound multiplex connection")
return mux.NewConnection(ctx, r, r, r.logger, conn, metadata)
case vmess.MuxDestination.Fqdn:
r.logger.InfoContext(ctx, "inbound legacy multiplex connection")
return vmess.HandleMuxConnection(ctx, conn, adapter.NewUpstreamHandler(metadata, r.RouteConnection, r.RoutePacketConnection, r))
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case uot.MagicAddress:
request, err := uot.ReadRequest(conn)
if err != nil {
return E.Cause(err, "read UoT request")
}
if request.IsConnect {
r.logger.InfoContext(ctx, "inbound UoT connect connection to ", request.Destination)
} else {
r.logger.InfoContext(ctx, "inbound UoT connection to ", request.Destination)
}
metadata.Domain = metadata.Destination.Fqdn
metadata.Destination = request.Destination
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return r.RoutePacketConnection(ctx, uot.NewConn(conn, *request), metadata)
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case uot.LegacyMagicAddress:
r.logger.InfoContext(ctx, "inbound legacy UoT connection")
metadata.Domain = metadata.Destination.Fqdn
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metadata.Destination = M.Socksaddr{Addr: netip.IPv4Unspecified()}
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return r.RoutePacketConnection(ctx, uot.NewConn(conn, uot.Request{}), metadata)
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}
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if metadata.InboundOptions.SniffEnabled {
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buffer := buf.NewPacket()
buffer.FullReset()
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sniffMetadata, _ := sniff.PeekStream(ctx, conn, buffer, time.Duration(metadata.InboundOptions.SniffTimeout), sniff.StreamDomainNameQuery, sniff.TLSClientHello, sniff.HTTPHost)
if sniffMetadata != nil {
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metadata.Protocol = sniffMetadata.Protocol
metadata.Domain = sniffMetadata.Domain
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if metadata.InboundOptions.SniffOverrideDestination && M.IsDomainName(metadata.Domain) {
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metadata.Destination = M.Socksaddr{
Fqdn: metadata.Domain,
Port: metadata.Destination.Port,
}
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}
if metadata.Domain != "" {
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r.logger.DebugContext(ctx, "sniffed protocol: ", metadata.Protocol, ", domain: ", metadata.Domain)
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} else {
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r.logger.DebugContext(ctx, "sniffed protocol: ", metadata.Protocol)
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}
}
if !buffer.IsEmpty() {
conn = bufio.NewCachedConn(conn, buffer)
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} else {
buffer.Release()
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}
}
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if metadata.Destination.IsFqdn() && dns.DomainStrategy(metadata.InboundOptions.DomainStrategy) != dns.DomainStrategyAsIS {
addresses, err := r.Lookup(adapter.WithContext(ctx, &metadata), metadata.Destination.Fqdn, dns.DomainStrategy(metadata.InboundOptions.DomainStrategy))
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if err != nil {
return err
}
metadata.DestinationAddresses = addresses
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r.dnsLogger.DebugContext(ctx, "resolved [", strings.Join(F.MapToString(metadata.DestinationAddresses), " "), "]")
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}
matchedRule, detour := r.match(ctx, &metadata, r.defaultOutboundForConnection)
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if !common.Contains(detour.Network(), N.NetworkTCP) {
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conn.Close()
return E.New("missing supported outbound, closing connection")
}
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if r.clashServer != nil {
trackerConn, tracker := r.clashServer.RoutedConnection(ctx, conn, metadata, matchedRule)
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defer tracker.Leave()
conn = trackerConn
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}
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if r.v2rayServer != nil {
if statsService := r.v2rayServer.StatsService(); statsService != nil {
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conn = statsService.RoutedConnection(metadata.Inbound, detour.Tag(), metadata.User, conn)
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}
}
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return detour.NewConnection(ctx, conn, metadata)
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}
func (r *Router) RoutePacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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if metadata.InboundDetour != "" {
if metadata.LastInbound == metadata.InboundDetour {
return E.New("routing loop on detour: ", metadata.InboundDetour)
}
detour := r.inboundByTag[metadata.InboundDetour]
if detour == nil {
return E.New("inbound detour not found: ", metadata.InboundDetour)
}
injectable, isInjectable := detour.(adapter.InjectableInbound)
if !isInjectable {
return E.New("inbound detour is not injectable: ", metadata.InboundDetour)
}
if !common.Contains(injectable.Network(), N.NetworkUDP) {
return E.New("inject: UDP unsupported")
}
metadata.LastInbound = metadata.Inbound
metadata.Inbound = metadata.InboundDetour
metadata.InboundDetour = ""
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err := injectable.NewPacketConnection(ctx, conn, metadata)
if err != nil {
return E.Cause(err, "inject ", detour.Tag())
}
return nil
}
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metadata.Network = N.NetworkUDP
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if metadata.InboundOptions.SniffEnabled {
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buffer := buf.NewPacket()
buffer.FullReset()
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destination, err := conn.ReadPacket(buffer)
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if err != nil {
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buffer.Release()
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return err
}
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sniffMetadata, _ := sniff.PeekPacket(ctx, buffer.Bytes(), sniff.DomainNameQuery, sniff.QUICClientHello, sniff.STUNMessage)
if sniffMetadata != nil {
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metadata.Protocol = sniffMetadata.Protocol
metadata.Domain = sniffMetadata.Domain
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if metadata.InboundOptions.SniffOverrideDestination && M.IsDomainName(metadata.Domain) {
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metadata.Destination = M.Socksaddr{
Fqdn: metadata.Domain,
Port: metadata.Destination.Port,
}
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}
if metadata.Domain != "" {
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r.logger.DebugContext(ctx, "sniffed packet protocol: ", metadata.Protocol, ", domain: ", metadata.Domain)
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} else {
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r.logger.DebugContext(ctx, "sniffed packet protocol: ", metadata.Protocol)
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}
}
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conn = bufio.NewCachedPacketConn(conn, buffer, destination)
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}
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if metadata.Destination.IsFqdn() && dns.DomainStrategy(metadata.InboundOptions.DomainStrategy) != dns.DomainStrategyAsIS {
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addresses, err := r.Lookup(adapter.WithContext(ctx, &metadata), metadata.Destination.Fqdn, dns.DomainStrategy(metadata.InboundOptions.DomainStrategy))
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if err != nil {
return err
}
metadata.DestinationAddresses = addresses
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r.dnsLogger.DebugContext(ctx, "resolved [", strings.Join(F.MapToString(metadata.DestinationAddresses), " "), "]")
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}
matchedRule, detour := r.match(ctx, &metadata, r.defaultOutboundForPacketConnection)
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if !common.Contains(detour.Network(), N.NetworkUDP) {
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conn.Close()
return E.New("missing supported outbound, closing packet connection")
}
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if r.clashServer != nil {
trackerConn, tracker := r.clashServer.RoutedPacketConnection(ctx, conn, metadata, matchedRule)
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defer tracker.Leave()
conn = trackerConn
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}
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if r.v2rayServer != nil {
if statsService := r.v2rayServer.StatsService(); statsService != nil {
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conn = statsService.RoutedPacketConnection(metadata.Inbound, detour.Tag(), metadata.User, conn)
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}
}
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return detour.NewPacketConnection(ctx, conn, metadata)
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}
func (r *Router) match(ctx context.Context, metadata *adapter.InboundContext, defaultOutbound adapter.Outbound) (adapter.Rule, adapter.Outbound) {
if r.processSearcher != nil {
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var originDestination netip.AddrPort
if metadata.OriginDestination.IsValid() {
originDestination = metadata.OriginDestination.AddrPort()
} else if metadata.Destination.IsIP() {
originDestination = metadata.Destination.AddrPort()
}
processInfo, err := process.FindProcessInfo(r.processSearcher, ctx, metadata.Network, metadata.Source.AddrPort(), originDestination)
if err != nil {
r.logger.InfoContext(ctx, "failed to search process: ", err)
} else {
if processInfo.ProcessPath != "" {
r.logger.InfoContext(ctx, "found process path: ", processInfo.ProcessPath)
} else if processInfo.PackageName != "" {
r.logger.InfoContext(ctx, "found package name: ", processInfo.PackageName)
} else if processInfo.UserId != -1 {
if /*needUserName &&*/ true {
osUser, _ := user.LookupId(F.ToString(processInfo.UserId))
if osUser != nil {
processInfo.User = osUser.Username
}
}
if processInfo.User != "" {
r.logger.InfoContext(ctx, "found user: ", processInfo.User)
} else {
r.logger.InfoContext(ctx, "found user id: ", processInfo.UserId)
}
}
metadata.ProcessInfo = processInfo
}
}
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for i, rule := range r.rules {
if rule.Match(metadata) {
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detour := rule.Outbound()
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r.logger.DebugContext(ctx, "match[", i, "] ", rule.String(), " => ", detour)
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if outbound, loaded := r.Outbound(detour); loaded {
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return rule, outbound
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}
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r.logger.ErrorContext(ctx, "outbound not found: ", detour)
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}
}
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return nil, defaultOutbound
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}
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func (r *Router) InterfaceFinder() control.InterfaceFinder {
return &r.interfaceFinder
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}
func (r *Router) AutoDetectInterface() bool {
return r.autoDetectInterface
}
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func (r *Router) AutoDetectInterfaceFunc() control.Func {
if r.platformInterface != nil {
return r.platformInterface.AutoDetectInterfaceControl()
} else {
return control.BindToInterfaceFunc(r.InterfaceFinder(), func(network string, address string) (interfaceName string, interfaceIndex int) {
remoteAddr := M.ParseSocksaddr(address).Addr
if C.IsLinux {
return r.InterfaceMonitor().DefaultInterfaceName(remoteAddr), -1
} else {
return "", r.InterfaceMonitor().DefaultInterfaceIndex(remoteAddr)
}
})
}
}
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func (r *Router) DefaultInterface() string {
return r.defaultInterface
}
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func (r *Router) DefaultMark() int {
return r.defaultMark
}
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func (r *Router) Rules() []adapter.Rule {
return r.rules
}
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func (r *Router) NetworkMonitor() tun.NetworkUpdateMonitor {
return r.networkMonitor
}
func (r *Router) InterfaceMonitor() tun.DefaultInterfaceMonitor {
return r.interfaceMonitor
}
func (r *Router) PackageManager() tun.PackageManager {
return r.packageManager
}
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func (r *Router) TimeFunc() func() time.Time {
if r.timeService == nil {
return nil
}
return r.timeService.TimeFunc()
}
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func (r *Router) ClashServer() adapter.ClashServer {
return r.clashServer
}
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func (r *Router) SetClashServer(server adapter.ClashServer) {
r.clashServer = server
}
func (r *Router) V2RayServer() adapter.V2RayServer {
return r.v2rayServer
}
func (r *Router) SetV2RayServer(server adapter.V2RayServer) {
r.v2rayServer = server
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}
func hasRule(rules []option.Rule, cond func(rule option.DefaultRule) bool) bool {
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for _, rule := range rules {
switch rule.Type {
case C.RuleTypeDefault:
if cond(rule.DefaultOptions) {
return true
}
case C.RuleTypeLogical:
for _, subRule := range rule.LogicalOptions.Rules {
if cond(subRule) {
return true
}
}
}
}
return false
}
func hasDNSRule(rules []option.DNSRule, cond func(rule option.DefaultDNSRule) bool) bool {
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for _, rule := range rules {
switch rule.Type {
case C.RuleTypeDefault:
if cond(rule.DefaultOptions) {
return true
}
case C.RuleTypeLogical:
for _, subRule := range rule.LogicalOptions.Rules {
if cond(subRule) {
return true
}
}
}
}
return false
}
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func isGeoIPRule(rule option.DefaultRule) bool {
return len(rule.SourceGeoIP) > 0 && common.Any(rule.SourceGeoIP, notPrivateNode) || len(rule.GeoIP) > 0 && common.Any(rule.GeoIP, notPrivateNode)
}
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func isGeoIPDNSRule(rule option.DefaultDNSRule) bool {
return len(rule.SourceGeoIP) > 0 && common.Any(rule.SourceGeoIP, notPrivateNode)
}
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func isGeositeRule(rule option.DefaultRule) bool {
return len(rule.Geosite) > 0
}
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func isGeositeDNSRule(rule option.DefaultDNSRule) bool {
return len(rule.Geosite) > 0
}
func isProcessRule(rule option.DefaultRule) bool {
return len(rule.ProcessName) > 0 || len(rule.ProcessPath) > 0 || len(rule.PackageName) > 0 || len(rule.User) > 0 || len(rule.UserID) > 0
}
func isProcessDNSRule(rule option.DefaultDNSRule) bool {
return len(rule.ProcessName) > 0 || len(rule.ProcessPath) > 0 || len(rule.PackageName) > 0 || len(rule.User) > 0 || len(rule.UserID) > 0
}
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func notPrivateNode(code string) bool {
return code != "private"
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}
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func (r *Router) prepareGeoIPDatabase() error {
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var geoPath string
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if r.geoIPOptions.Path != "" {
geoPath = r.geoIPOptions.Path
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} else {
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geoPath = "geoip.db"
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if foundPath, loaded := C.FindPath(geoPath); loaded {
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geoPath = foundPath
}
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}
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geoPath = C.BasePath(geoPath)
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if !rw.FileExists(geoPath) {
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r.logger.Warn("geoip database not exists: ", geoPath)
var err error
for attempts := 0; attempts < 3; attempts++ {
err = r.downloadGeoIPDatabase(geoPath)
if err == nil {
break
}
r.logger.Error("download geoip database: ", err)
os.Remove(geoPath)
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// time.Sleep(10 * time.Second)
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}
if err != nil {
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return err
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}
}
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geoReader, codes, err := geoip.Open(geoPath)
if err != nil {
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return E.Cause(err, "open geoip database")
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}
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r.logger.Info("loaded geoip database: ", len(codes), " codes")
r.geoIPReader = geoReader
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return nil
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}
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func (r *Router) prepareGeositeDatabase() error {
var geoPath string
if r.geositeOptions.Path != "" {
geoPath = r.geositeOptions.Path
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} else {
geoPath = "geosite.db"
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if foundPath, loaded := C.FindPath(geoPath); loaded {
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geoPath = foundPath
}
}
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geoPath = C.BasePath(geoPath)
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if !rw.FileExists(geoPath) {
r.logger.Warn("geosite database not exists: ", geoPath)
var err error
for attempts := 0; attempts < 3; attempts++ {
err = r.downloadGeositeDatabase(geoPath)
if err == nil {
break
}
r.logger.Error("download geosite database: ", err)
os.Remove(geoPath)
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// time.Sleep(10 * time.Second)
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}
if err != nil {
return err
}
}
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geoReader, codes, err := geosite.Open(geoPath)
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if err == nil {
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r.logger.Info("loaded geosite database: ", len(codes), " codes")
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r.geositeReader = geoReader
} else {
return E.Cause(err, "open geosite database")
}
return nil
}
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func (r *Router) downloadGeoIPDatabase(savePath string) error {
var downloadURL string
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if r.geoIPOptions.DownloadURL != "" {
downloadURL = r.geoIPOptions.DownloadURL
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} else {
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downloadURL = "https://github.com/SagerNet/sing-geoip/releases/latest/download/geoip.db"
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}
r.logger.Info("downloading geoip database")
var detour adapter.Outbound
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if r.geoIPOptions.DownloadDetour != "" {
outbound, loaded := r.Outbound(r.geoIPOptions.DownloadDetour)
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if !loaded {
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return E.New("detour outbound not found: ", r.geoIPOptions.DownloadDetour)
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}
detour = outbound
} else {
detour = r.defaultOutboundForConnection
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}
if parentDir := filepath.Dir(savePath); parentDir != "" {
os.MkdirAll(parentDir, 0o755)
}
saveFile, err := os.OpenFile(savePath, os.O_CREATE|os.O_WRONLY, 0o644)
if err != nil {
return E.Cause(err, "open output file: ", downloadURL)
}
defer saveFile.Close()
httpClient := &http.Client{
Transport: &http.Transport{
ForceAttemptHTTP2: true,
TLSHandshakeTimeout: 5 * time.Second,
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
return detour.DialContext(ctx, network, M.ParseSocksaddr(addr))
},
},
}
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defer httpClient.CloseIdleConnections()
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response, err := httpClient.Get(downloadURL)
if err != nil {
return err
}
defer response.Body.Close()
_, err = io.Copy(saveFile, response.Body)
return err
}
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func (r *Router) downloadGeositeDatabase(savePath string) error {
var downloadURL string
if r.geositeOptions.DownloadURL != "" {
downloadURL = r.geositeOptions.DownloadURL
} else {
downloadURL = "https://github.com/SagerNet/sing-geosite/releases/latest/download/geosite.db"
}
r.logger.Info("downloading geosite database")
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var detour adapter.Outbound
if r.geositeOptions.DownloadDetour != "" {
outbound, loaded := r.Outbound(r.geositeOptions.DownloadDetour)
if !loaded {
return E.New("detour outbound not found: ", r.geositeOptions.DownloadDetour)
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}
detour = outbound
} else {
detour = r.defaultOutboundForConnection
}
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if parentDir := filepath.Dir(savePath); parentDir != "" {
os.MkdirAll(parentDir, 0o755)
}
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saveFile, err := os.OpenFile(savePath, os.O_CREATE|os.O_WRONLY, 0o644)
if err != nil {
return E.Cause(err, "open output file: ", downloadURL)
}
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defer saveFile.Close()
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httpClient := &http.Client{
Transport: &http.Transport{
ForceAttemptHTTP2: true,
TLSHandshakeTimeout: 5 * time.Second,
DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
return detour.DialContext(ctx, network, M.ParseSocksaddr(addr))
},
},
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}
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defer httpClient.CloseIdleConnections()
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response, err := httpClient.Get(downloadURL)
if err != nil {
return err
}
defer response.Body.Close()
_, err = io.Copy(saveFile, response.Body)
return err
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}
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func (r *Router) OnPackagesUpdated(packages int, sharedUsers int) {
r.logger.Info("updated packages list: ", packages, " packages, ", sharedUsers, " shared users")
}
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func (r *Router) NewError(ctx context.Context, err error) {
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common.Close(err)
if E.IsClosedOrCanceled(err) {
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r.logger.DebugContext(ctx, "connection closed: ", err)
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return
}
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r.logger.ErrorContext(ctx, err)
}
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func (r *Router) notifyNetworkUpdate(int) error {
if C.IsAndroid {
var vpnStatus string
if r.interfaceMonitor.AndroidVPNEnabled() {
vpnStatus = "enabled"
} else {
vpnStatus = "disabled"
}
r.logger.Info("updated default interface ", r.interfaceMonitor.DefaultInterfaceName(netip.IPv4Unspecified()), ", index ", r.interfaceMonitor.DefaultInterfaceIndex(netip.IPv4Unspecified()), ", vpn ", vpnStatus)
} else {
r.logger.Info("updated default interface ", r.interfaceMonitor.DefaultInterfaceName(netip.IPv4Unspecified()), ", index ", r.interfaceMonitor.DefaultInterfaceIndex(netip.IPv4Unspecified()))
}
for _, outbound := range r.outbounds {
listener, isListener := outbound.(adapter.InterfaceUpdateListener)
if isListener {
err := listener.InterfaceUpdated()
if err != nil {
return err
}
}
}
return nil
}