如何高效实现扫描局域网IP、主机名、MAC和端口
近几年工作经常使用RFID识读器，智能家居网关，温湿度传感器、串口服务器、视频编码器等，一般是有串口和网口，由于现场原因一般较少使用串口，大多使用网口。连接方法是IP地址和端口，有的设备带搜索软件，有的就不带。经常测试环境和现场来回用，难免记混。同时使用网上的一些端口扫描工具，发现有一个问题，就是在进行扫描的时候，不怎么好用，比如，扫描器一般都是带端口扫描的，但是，我仅仅只用扫描设备在不在线，不用扫描端口，但是有一些设备是只要扫描端口，这个怎么更方便更好用呢？
同时在扫描成功之后，需要通过TCP连接到设备，发数据，看数据能不能正常相应，或者设备状态对不对，这是不是又要单独开另外一个软件？使用起来，比较繁琐，因此就根据自己的需要制作了一个小工具，用来扫描IP和端口。
扫描速度一定要快，成功和不成功区分要明显，好了，先上图:
一、主要IP扫描方法：
（1）、IP地址匹配，看IP设置是否正确
//匹配正确的IP地址
Regex rgx = new Regex(@"^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}$");
if (rgx.IsMatch(IPStarttextBox.Text) && rgx.IsMatch(IPStoptextBox.Text))//匹配正确IP
{
if (scan_type == 1)
{
int startIp = Int32.Parse(IPStarttextBox.Text.Split('.')[3]);
int endIp = Int32.Parse(IPStoptextBox.Text.Split('.')[3]);
progressBar.Minimum = startIp;
progressBar.Maximum = endIp;
}
else
{
if (PortStarttextBox.Text == "")
{
MessageBox.Show("请输入端口号！");
}
else
{
portStart = Int32.Parse(PortStarttextBox.Text);
portEnd = Int32.Parse(PortEndtextBox.Text);
progressBar.Minimum = portStart;
progressBar.Maximum = portEnd;
}
if (portEnd < portStart)
{
MessageBox.Show("请填写正确端口范围");
return;
}
}
}
else
{
MessageBox.Show("请填写正确IP");
return;
}
（2）、获取主机名
public static string GetHostEntry(object ip) { string hostname = "-"; try { IPHostEntry host = Dns.GetHostEntry(ip.ToString()); hostname = host.HostName; } catch(Exception ex) { Console.WriteLine(ex.ToString()); } return hostname; }
（3）、获取MAC地址
[DllImport("ws2_32.dll")] private static extern int inet_addr(string cp); [DllImport("IPHLPAPI.dll")] private static extern int SendARP(Int32 DestIP, Int32 SrcIP, ref Int64 pMacAddr, ref Int32 PhyAddrLen); private string GetMacAddress(string hostip)//获取远程IP（不能跨网段）的MAC地址 { string Mac = ""; try { Int32 ldest = inet_addr(hostip); //将IP地址从 点数格式转换成无符号长整型 Int64 macinfo = new Int64(); Int32 len = 6; SendARP(ldest, 0, ref macinfo, ref len); string TmpMac = Convert.ToString(macinfo, 16).PadLeft(12, '0');//转换成16进制 注意有些没有十二位 Mac = TmpMac.Substring(0, 2).ToUpper();// for (int i = 2; i < TmpMac.Length; i = i + 2) { Mac = TmpMac.Substring(i, 2).ToUpper() + "-" + Mac; } } catch (Exception Mye) { Mac = "获取远程主机的MAC错误：" + Mye.Message; } return Mac; }
（3）、主要准备工作做好了，接下来，进入主题，如何通过多线程判断IP是否在线。
Thread waitT = new Thread(new ThreadStart(ipwait)); waitT.Start();//等待所有线程执行完毕在写入textbox中 public void ipwait() { int startIp = Int32.Parse(IPStarttextBox.Text.Split('.')[3]); int endIp = Int32.Parse(IPStoptextBox.Text.Split('.')[3]); ListViewItem lvi; string ip = IPStarttextBox.Text.Split('.')[0] + "." + IPStarttextBox.Text.Split('.')[1] + "." + IPStarttextBox.Text.Split('.')[2] + "."; String ipaddr = ""; int timeout = int.Parse(TimeOuttextBox.Text); string mac = ""; progressBar.Minimum = startIp; progressBar.Maximum = endIp; try { for (int q = startIp; q <= endIp && isrun == true; q++) { //---------------------ping ipaddr = ip + q; lvi = new ListViewItem(); Ping ping = new Ping(); PingReply reply = ping.Send(IPAddress.Parse(ipaddr), overTime); if (reply.Status == IPStatus.Success) { ResuleTextBox.Text += ipaddr + " Ping时间 " + reply.RoundtripTime + " 毫秒\n"; mac= GetMacAddress(ipaddr); // IPHostEntry host = Dns.GetHostEntry(ipaddr); // IPHostEntry host = Dns.GetHostByAddress(ipaddr); // ResuleTextBox.Text += "主机名为 " + host.HostName + "\n"; // ScanResultlistBox.Items.Add(ipaddr + " " + mac + " 在线 "); lvi.BackColor = Color.LightSeaGreen; lvi.Text = ipaddr; Task<string> t1 = new Task<string>(GetHostEntry,ipaddr); t1.Start(); t1.Wait(timeout); //设置获取主机名超时时间 if(t1.IsCompleted) { lvi.SubItems.Add(t1.Result); } else { lvi.SubItems.Add("-"); } lvi.SubItems.Add(mac); lvi.SubItems.Add("在线"); } else { lvi.BackColor = Color.Pink; lvi.Text = ipaddr; lvi.SubItems.Add("-"); lvi.SubItems.Add("-"); lvi.SubItems.Add("不在线"); } progressBar.Value = q; progressBar.Update(); ListViewUpdate(lvi); ResuleTextBox.SelectionStart = ResuleTextBox.Text.Length -1; ResuleTextBox.ScrollToCaret(); } ScanResultlistBox.Items[ScanResultlistBox.Items.Count - 1].EnsureVisible(); } catch(Exception ex) { Console.WriteLine(ex.ToString()); isrun = false; progressBar.Value = progressBar.Minimum; startScanbutton.Enabled = true; stopScanbutton.Enabled = false; ResuleTextBox.Text += ex.ToString(); } startScanbutton.Enabled = true; stopScanbutton.Enabled = false; isrun = false; progressBar.Value = progressBar.Maximum; }
说明一下：在我获取主机名的过程中，发现如果不对获取主机名设置一个超时时间，那么将会出现一个问题，程序将会卡在获取主机名的这个阶段，无法向下继续执行，因为，为了高效的执行，给获取主机名设置一个超时时间，将会大大提高程序的执行效率。
二、主要端口状态获取方法
Thread waitT = new Thread(new ThreadStart(portwait)); waitT.Start();//等待所有线程执行完毕在写入textbox中 public void portwait() { int startIp = Int32.Parse(IPStarttextBox.Text.Split('.')[3]); int endIp = Int32.Parse(IPStoptextBox.Text.Split('.')[3]); string ip = IPStarttextBox.Text.Split('.')[0] + "." + IPStarttextBox.Text.Split('.')[1] + "." + IPStarttextBox.Text.Split('.')[2] + "."; String mac = "" , ipaddr =""; ListViewItem lvi; String host; int timeout = int.Parse(TimeOuttextBox.Text); for (int q = startIp; q <= endIp && isrun == true; q++) { ResuleTextBox.Text += (ip + q) + " IP地址扫描中---\n"; //---------------------ping Ping ping = new Ping(); PingReply reply = ping.Send(IPAddress.Parse(ip + q), overTime); ipaddr = ip + q; if (reply.Status == IPStatus.Success) { ResuleTextBox.Text +=ipaddr + " Ping时间" + reply.RoundtripTime + "毫秒\n"; mac = GetMacAddress(ipaddr); Task<string> t1 = new Task<string>(GetHostEntry, ipaddr); t1.Start(); t1.Wait(timeout); if (t1.IsCompleted) { host = t1.Result.ToString(); } else { host = "-"; } ResuleTextBox.Text += "MAC地址为 " + mac + "\n"; } else { // ScanResultlistBox.Items.Add(ipaddr + " " + "-" + " " + "-" + " " + " - 不可达\n"); lvi = new ListViewItem(); lvi.BackColor = Color.Pink; lvi.Text = ipaddr; lvi.SubItems.Add("-"); lvi.SubItems.Add("-"); lvi.SubItems.Add("不可达"); ResuleTextBox.Text += ipaddr + "不可达\n"; ListViewUpdate(lvi); continue; } //---------------------end Thread[] tharr; if (numThread < (portEnd - portStart + 1)) { tharr = new Thread[portEnd - portStart + 1]; } else { tharr = new Thread[numThread]; } str = new List<string>(); for (int i = portStart; (i <= portEnd) && (isrun ==true); i++) { Thread thread = new Thread(new ParameterizedThreadStart(Scan)); thread.Start(new IPEndPoint(IPAddress.Parse(ip + q), i));//每扫描一个端口创建一个线程 ResuleTextBox.Text += i + " 端口扫描中---\n"; tharr[i - portStart] = thread; progressBar.Value = i; string s = State(i); lvi = new ListViewItem(); if (s == "Open") { lvi.BackColor = Color.LightSeaGreen; } else { lvi.BackColor = Color.Silver; } lvi.Text = ipaddr + ":" + i.ToString(); lvi.SubItems.Add(host); lvi.SubItems.Add(mac); if (checkBox1.Checked) { if (s == "Open") { // ScanResultlistBox.Items.Add(ip + q + " " + mac +" "+ i + " " + s + " " + " " + Service(i)); lvi.SubItems.Add(i.ToString()); lvi.SubItems.Add(s); lvi.SubItems.Add(Service(i)); } else { lvi = null; } } else { if (s == "Open") { // ScanResultlistBox.Items.Add(ip + q + " " + mac + " " + i + " " + s + " " + " " + Service(i)); lvi.SubItems.Add(i.ToString()); lvi.SubItems.Add(s); lvi.SubItems.Add(Service(i)); } else { // ScanResultlistBox.Items.Add(ip + q + " " + mac + " " + i + " " + s + " " + " "); lvi.SubItems.Add(i.ToString()); lvi.SubItems.Add(s); lvi.SubItems.Add(""); } } if (lvi != null) { ListViewUpdate(lvi); } } bool iscon = true;//第一个线程等待时间 for (int i = 0; i < tharr.Length; i++) { if (tharr[i] == null) continue; while (tharr[i].IsAlive && iscon)//端口超时设置时间(目前200毫秒),一直等待此ip所有线程执行完毕才扫描下个ip { Thread.Sleep(200); iscon = false;//第一个线程给200ms等待时间，其他线程由于同步执行的，所以没等待时间了,如果线程还没执行完，说明此端口不可达。 } } str.Sort(); ResuleTextBox.Text += "开放端口： "; for (int k = 0; k < str.Count; k++) ResuleTextBox.Text += str[k] + " "; ResuleTextBox.Text += "\n"; } ScanResultlistBox.Items[ScanResultlistBox.Items.Count - 1].EnsureVisible(); if (isrun == true) { MessageBox.Show("扫描完成"); progressBar.Value = progressBar.Minimum; startScanbutton.Enabled = true; stopScanbutton.Enabled = false; isrun = false; } else { MessageBox.Show("扫描终止"); startScanbutton.Enabled = true; stopScanbutton.Enabled = false; progressBar.Value = progressBar.Minimum; isrun = false; } } public string State(int i) { str.Sort(); for (int k = 0; k < str.Count; k++) { string s = str[k]; if (Convert.ToString(i) == s) return "Open"; } return "Closed"; } public string Service(int i) { switch (i) { case 80: return "HTTP协议代理服务"; case 135: return "DCE endpoint resolutionnetbios-ns"; case 445: return "安全服务"; case 1025: return "NetSpy.698(YAI)"; case 8080: return "HTTP协议代理服务"; case 8081: return "HTTP协议代理服务"; case 3128: return "HTTP协议代理服务"; case 9080: return "HTTP协议代理服务"; case 1080: return "SOCKS代理协议服务"; case 21: return "FTP(文件传输)协议代理服务"; case 23: return "Telnet(远程登录)协议代理服务"; case 443: return "HTTPS协议代理服务"; case 69: return "TFTP协议代理服务"; case 22: return "SSH、SCP、端口重定向协议代理服务"; case 25: return "SMTP协议代理服务"; case 110: return "POP3协议代理服务"; default: return "Unknow Servies"; } } public void Scan(object Point) { IPEndPoint IPPoint = (IPEndPoint)Point; try { TcpClient tcp = new TcpClient(); tcp.Connect(IPPoint); if (tcp.Connected) str.Add(Convert.ToString(IPPoint.Port)); } catch (Exception ex) { Console.WriteLine(ex.ToString()); } }
好了，大家最后，可能都会说，我不想设计，也不想开发，我想要现成的怎么办？当然了，最后附上程序，大家可以实际进行测试使用。
工具链接：http://download.csdn.net/detail/dwx1005526886/9808540
