Initial commit (code only without large binaries)

EdgeNode/internal/utils/netpackets/utils.go

@@ -0,0 +1,18 @@
+// Copyright 2023 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package netpackets
+
+// IsLocalRawIPv4 使用原始IP数据判断是否为本地IPv4
+func IsLocalRawIPv4(ip []byte) bool {
+	if len(ip) != 4 {
+		return false
+	}
+	if ip[0] == 127 ||
+		ip[0] == 10 ||
+		(ip[0] == 172 && ip[1]&0xf0 == 16) ||
+		(ip[0] == 192 && ip[1] == 168) {
+		return true
+	}
+
+	return false
+}