增加LinkAcl功能，可以限制访问端口

handler/payload.go

@@ -1,6 +1,10 @@
 package handler
 
-import "github.com/bjdgyc/anylink/sessdata"
+import (
+	"github.com/bjdgyc/anylink/dbdata"
+	"github.com/bjdgyc/anylink/sessdata"
+	"github.com/songgao/water/waterutil"
+)
 
 func payloadIn(cSess *sessdata.ConnSession, lType sessdata.LType, pType byte, data []byte) bool {
 	payload := &sessdata.Payload{
@@ -13,8 +17,14 @@ func payloadIn(cSess *sessdata.ConnSession, lType sessdata.LType, pType byte, da
 }
 
 func payloadInData(cSess *sessdata.ConnSession, payload *sessdata.Payload) bool {
-	closed := false
+	// 进行Acl规则判断
+	check := checkLinkAcl(cSess.Group, payload)
+	if !check {
+		// 校验不通过直接丢弃
+		return false
+	}
 
+	closed := false
 	select {
 	case cSess.PayloadIn <- payload:
 	case <-cSess.CloseChan:
@@ -45,3 +55,37 @@ func payloadOutData(cSess *sessdata.ConnSession, payload *sessdata.Payload) bool
 
 	return closed
 }
+
+// Acl规则校验
+func checkLinkAcl(group *dbdata.Group, payload *sessdata.Payload) bool {
+	if payload.LType == sessdata.LTypeIPData && payload.PType == 0x00 && len(group.LinkAcl) > 0 {
+	} else {
+		return true
+	}
+
+	ip_dst := waterutil.IPv4Destination(payload.Data)
+	ip_port := waterutil.IPv4DestinationPort(payload.Data)
+	// fmt.Println("sent:", ip_dst, ip_port)
+
+	// 优先放行dns端口
+	for _, v := range group.ClientDns {
+		if v.Val == ip_dst.String() && ip_port == 53 {
+			return true
+		}
+	}
+
+	for _, v := range group.LinkAcl {
+		// 循环判断ip和端口
+		if v.IpNet.Contains(ip_dst) {
+			if v.Port == ip_port || v.Port == 0 {
+				if v.Action == dbdata.Allow {
+					return true
+				} else {
+					return false
+				}
+			}
+		}
+	}
+
+	return false
+}