From cb2fdf2ffd3df82b3e3c8727310a03f2496a1da7 Mon Sep 17 00:00:00 2001
From: wangsiyuan <2392948297@qq.com>
Date: Fri, 16 Jun 2023 16:07:00 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=9B=E5=BB=BA=20CheckBelongPrivate.go?=
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---
 modules/CheckBelongPrivate.go | 50 +++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 modules/CheckBelongPrivate.go

diff --git a/modules/CheckBelongPrivate.go b/modules/CheckBelongPrivate.go
new file mode 100644
index 0000000..7187e7e
--- /dev/null
+++ b/modules/CheckBelongPrivate.go
@@ -0,0 +1,50 @@
+package modules
+
+import (
+	"fmt"
+	"net"
+)
+
+type IPInformation struct {
+	IP          string
+	IsPrivate   bool
+	PrivateCIDR string
+}
+
+func GetIPInformation(ip string) IPInformation {
+	ipInfo := IPInformation{
+		IP:          ip,
+		IsPrivate:   false,
+		PrivateCIDR: "",
+	}
+
+	cidrs := []*net.IPNet{
+		parseCIDR("10.0.0.0/8"),
+		parseCIDR("172.16.0.0/12"),
+		parseCIDR("192.168.0.0/16"),
+	}
+
+	ipAddr := net.ParseIP(ip)
+	if ipAddr == nil {
+		fmt.Println("无效的IP地址")
+		return ipInfo
+	}
+
+	for _, cidr := range cidrs {
+		if cidr.Contains(ipAddr) {
+			ipInfo.IsPrivate = true
+			ipInfo.PrivateCIDR = cidr.String()
+			break
+		}
+	}
+
+	return ipInfo
+}
+
+func parseCIDR(cidr string) *net.IPNet {
+	_, ipNet, err := net.ParseCIDR(cidr)
+	if err != nil {
+		panic(err)
+	}
+	return ipNet
+}