Style: code style

rule/process.go

@@ -0,0 +1,65 @@
+package rules
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/Dreamacro/clash/common/cache"
+	"github.com/Dreamacro/clash/component/process"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
+)
+
+var processCache = cache.NewLRUCache(cache.WithAge(2), cache.WithSize(64))
+
+type Process struct {
+	adapter string
+	process string
+}
+
+func (ps *Process) RuleType() C.RuleType {
+	return C.Process
+}
+
+func (ps *Process) Match(metadata *C.Metadata) bool {
+	key := fmt.Sprintf("%s:%s:%s", metadata.NetWork.String(), metadata.SrcIP.String(), metadata.SrcPort)
+	cached, hit := processCache.Get(key)
+	if !hit {
+		srcPort, err := strconv.Atoi(metadata.SrcPort)
+		if err != nil {
+			processCache.Set(key, "")
+			return false
+		}
+
+		name, err := process.FindProcessName(metadata.NetWork.String(), metadata.SrcIP, srcPort)
+		if err != nil {
+			log.Debugln("[Rule] find process name %s error: %s", C.Process.String(), err.Error())
+		}
+
+		processCache.Set(key, name)
+
+		cached = name
+	}
+
+	return strings.EqualFold(cached.(string), ps.process)
+}
+
+func (ps *Process) Adapter() string {
+	return ps.adapter
+}
+
+func (ps *Process) Payload() string {
+	return ps.process
+}
+
+func (ps *Process) ShouldResolveIP() bool {
+	return false
+}
+
+func NewProcess(process string, adapter string) (*Process, error) {
+	return &Process{
+		adapter: adapter,
+		process: process,
+	}, nil
+}