148 lines
2.9 KiB
Go
148 lines
2.9 KiB
Go
package tunnel
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import (
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"sync"
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"time"
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InboundAdapter "github.com/Dreamacro/clash/adapters/inbound"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/log"
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"gopkg.in/eapache/channels.v1"
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)
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var (
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tunnel *Tunnel
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once sync.Once
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)
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// Tunnel handle proxy socket and HTTP/SOCKS socket
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type Tunnel struct {
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queue *channels.InfiniteChannel
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rules []C.Rule
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proxies map[string]C.Proxy
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configLock *sync.RWMutex
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traffic *C.Traffic
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// Outbound Rule
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mode Mode
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}
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// Add request to queue
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func (t *Tunnel) Add(req C.ServerAdapter) {
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t.queue.In() <- req
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}
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// Traffic return traffic of all connections
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func (t *Tunnel) Traffic() *C.Traffic {
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return t.traffic
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}
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// Rules return all rules
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func (t *Tunnel) Rules() []C.Rule {
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return t.rules
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}
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// UpdateRules handle update rules
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func (t *Tunnel) UpdateRules(rules []C.Rule) {
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t.configLock.Lock()
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t.rules = rules
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t.configLock.Unlock()
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}
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// Proxies return all proxies
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func (t *Tunnel) Proxies() map[string]C.Proxy {
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return t.proxies
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}
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// UpdateProxies handle update proxies
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func (t *Tunnel) UpdateProxies(proxies map[string]C.Proxy) {
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t.configLock.Lock()
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t.proxies = proxies
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t.configLock.Unlock()
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}
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// Mode return current mode
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func (t *Tunnel) Mode() Mode {
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return t.mode
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}
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// SetMode change the mode of tunnel
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func (t *Tunnel) SetMode(mode Mode) {
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t.mode = mode
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}
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func (t *Tunnel) process() {
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queue := t.queue.Out()
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for {
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elm := <-queue
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conn := elm.(C.ServerAdapter)
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go t.handleConn(conn)
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}
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}
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func (t *Tunnel) handleConn(localConn C.ServerAdapter) {
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defer localConn.Close()
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metadata := localConn.Metadata()
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var proxy C.Proxy
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switch t.mode {
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case Direct:
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proxy = t.proxies["DIRECT"]
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case Global:
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proxy = t.proxies["GLOBAL"]
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// Rule
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default:
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proxy = t.match(metadata)
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}
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remoConn, err := proxy.Generator(metadata)
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if err != nil {
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log.Warnln("Proxy[%s] connect [%s] error: %s", proxy.Name(), metadata.String(), err.Error())
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return
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}
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defer remoConn.Close()
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switch adapter := localConn.(type) {
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case *InboundAdapter.HTTPAdapter:
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t.handleHTTP(adapter, remoConn)
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case *InboundAdapter.SocketAdapter:
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t.handleSOCKS(adapter, remoConn)
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}
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}
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func (t *Tunnel) match(metadata *C.Metadata) C.Proxy {
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t.configLock.RLock()
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defer t.configLock.RUnlock()
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for _, rule := range t.rules {
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if rule.IsMatch(metadata) {
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a, ok := t.proxies[rule.Adapter()]
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if !ok {
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continue
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}
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log.Infoln("%v match %s using %s", metadata.String(), rule.RuleType().String(), rule.Adapter())
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return a
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}
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}
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log.Infoln("%v doesn't match any rule using DIRECT", metadata.String())
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return t.proxies["DIRECT"]
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}
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func newTunnel() *Tunnel {
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return &Tunnel{
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queue: channels.NewInfiniteChannel(),
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proxies: make(map[string]C.Proxy),
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configLock: &sync.RWMutex{},
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traffic: C.NewTraffic(time.Second),
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mode: Rule,
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}
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}
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// Instance return singleton instance of Tunnel
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func Instance() *Tunnel {
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once.Do(func() {
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tunnel = newTunnel()
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go tunnel.process()
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})
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return tunnel
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}
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