Chore: move find connection process to tunnel (#2016)

tunnel/tunnel.go

@@ -5,11 +5,13 @@ import (
 	"fmt"
 	"net"
 	"runtime"
+	"strconv"
 	"sync"
 	"time"
 
 	"github.com/Dreamacro/clash/adapter/inbound"
 	"github.com/Dreamacro/clash/component/nat"
+	P "github.com/Dreamacro/clash/component/process"
 	"github.com/Dreamacro/clash/component/resolver"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/constant/provider"
@@ -308,6 +310,7 @@ func match(metadata *C.Metadata) (C.Proxy, C.Rule, error) {
 	defer configMux.RUnlock()
 
 	var resolved bool
+	var processFound bool
 
 	if node := resolver.DefaultHosts.Search(metadata.Host); node != nil {
 		ip := node.Data.(net.IP)
@@ -327,6 +330,21 @@ func match(metadata *C.Metadata) (C.Proxy, C.Rule, error) {
 			resolved = true
 		}
 
+		if !processFound && rule.ShouldFindProcess() {
+			processFound = true
+
+			srcPort, err := strconv.Atoi(metadata.SrcPort)
+			if err == nil {
+				path, err := P.FindProcessName(metadata.NetWork.String(), metadata.SrcIP, srcPort)
+				if err != nil {
+					log.Debugln("[Process] find process %s: %v", metadata.String(), err)
+				} else {
+					log.Debugln("[Process] %s from process %s", metadata.String(), path)
+					metadata.ProcessPath = path
+				}
+			}
+		}
+
 		if rule.Match(metadata) {
 			adapter, ok := proxies[rule.Adapter()]
 			if !ok {