最近因为公司的业务要求，在没有网络的情况下，没有路由器支持的情况下，需要组建一个小局域网，可以同时支持多个终端的相互之间的通信，这里的解决方案如下。

一、硬件要求：任意支持软AP的无限网卡，具体是否支持请输入命令行如下查看，如图（一）：

图（一）

根据上图，包含 C:\Windows\system32\DRIVERS\vwifibus.sys即可支持软AP。

二、熟悉命令

1.设置并允许虚拟无线网路； 命令：netsh 命令符下输入 wlan set hostednetwork mode = allow ssid=无线名称 key=无线密码（8位数） 返回结果：承载网络模式已设置为允许。 已成功更改承载网络的 SSID。 已成功更改托管网络的用户密钥密码。 2.显示设置的虚拟网络信息； 命令：netsh 命令符下输入 wlan show hostednetwork 返回结果：承载网络设置 ----------------------- 模式 : 已启用 SSID 名称 :“无线名称” 最多客户端数 : 32 身份验证 : WPA2 - 个人 密码 : CCMP 承载网络状态 --------------------- 状态 : 未启动 netsh> 3.启动设置的无线网络 命令：netsh 命令符下输入 wlan start hostednetwork 4.停止设置的无线网络 命令：netsh 命令符下输入 wlan stop hostednetwork 5.禁止设置的无线网络 命令：命令：netsh 命令符下输入 wlan set hostednetwork mode=disallow

返回结果：承载网络模式已设置为禁止。

三、对应封装的C#类，代码如下：

public class VWirelessNetworkManager { private bool isEnableDynamicKey = false; private string cleartextKey = null; public event EventHandler<VWirelessNetworkEventArgs> VWirelessStarted; public event EventHandler<VWirelessNetworkEventArgs> VWirelessStopped; public event EventHandler<VWirelessNetworkEventArgs> VWirelessSetted; private static readonly Process currentProcess = null; private static Process CurrentProcess { get; } private static bool isRunNetsh = true; private static bool isExitNetsh = false; /// <summary> /// 虚拟无线网络信息 /// </summary> public VWirelessNetwork VWirelessNetworkInfo { get { return this.GetVWirelessNetwork(); } } static VWirelessNetworkManager() { currentProcess = new Process(); currentProcess.StartInfo = new ProcessStartInfo() { RedirectStandardInput = true, RedirectStandardOutput = true, RedirectStandardError = true, UseShellExecute = false, CreateNoWindow = true, //FileName = "netsh" FileName = "netsh" }; currentProcess.Start(); } private bool RunNetsh() { if (!isRunNetsh) { isRunNetsh = true; isExitNetsh = false; currentProcess.Start(); } return isRunNetsh; } private bool ExitNetsh() { if (!isExitNetsh) { currentProcess.StandardInput.WriteLine("exit"); isRunNetsh = false; isExitNetsh = true; } return isExitNetsh; } public void SetVWirelessInfo(string sSID) { string encryptPlus; string key = GetDynamicVWirelessKey(sSID, out encryptPlus); SetVWirelessInfo(sSID, key, true); } public void SetVWirelessInfo(string sSID, string key) { SetVWirelessInfo(sSID, key, false); } public void SetVWirelessInfo(string sSID, string key, bool isEnableDynamicKey) { this.cleartextKey = key; this.isEnableDynamicKey = isEnableDynamicKey; RunNetsh(); currentProcess.StandardInput.AutoFlush = true; currentProcess.StandardInput.WriteLine(string.Format("wlan set hostednetwork mode=allow ssid={0} key={1}", sSID, key)); ExitNetsh(); VWirelessNetworkEventArgs e = new PlatForm.VWirelessNetworkEventArgs(); e.CommandExecutedResult = currentProcess.StandardOutput.ReadToEnd(); e.VWirelessNetworkShowInfo = GetVWirelessNetwork(); OnVWirelessSetted(e); } public void StartVWirelessNet() { RunNetsh(); currentProcess.StandardInput.AutoFlush = true; currentProcess.StandardInput.WriteLine("wlan start hostednetwork"); ExitNetsh(); VWirelessNetworkEventArgs e = new PlatForm.VWirelessNetworkEventArgs(); e.CommandExecutedResult = currentProcess.StandardOutput.ReadToEnd(); e.VWirelessNetworkShowInfo = GetVWirelessNetwork(); e.IPAddress = GetIpAddress(); OnVWirelessStarted(e); } public void StopVWirelessNet() { RunNetsh(); currentProcess.StandardInput.AutoFlush = true; currentProcess.StandardInput.WriteLine("wlan stop hostednetwork"); ExitNetsh(); VWirelessNetworkEventArgs e = new PlatForm.VWirelessNetworkEventArgs(); e.CommandExecutedResult = currentProcess.StandardOutput.ReadToEnd(); e.VWirelessNetworkShowInfo = GetVWirelessNetwork(); OnVWirelessStopped(e); } public void DisallowVWirelessNet() { RunNetsh(); currentProcess.StandardInput.AutoFlush = true; currentProcess.StandardInput.WriteLine("wlan set hostednetwork mode=disallow"); ExitNetsh(); VWirelessNetworkEventArgs e = new PlatForm.VWirelessNetworkEventArgs(); e.CommandExecutedResult = currentProcess.StandardOutput.ReadToEnd(); e.VWirelessNetworkShowInfo = GetVWirelessNetwork(); } protected virtual VWirelessNetwork GetVWirelessNetwork() { RunNetsh(); currentProcess.StandardInput.AutoFlush = true; currentProcess.StandardInput.WriteLine("wlan show hostednetwork"); ExitNetsh(); VWirelessNetwork vWNInfo = new VWirelessNetwork(); vWNInfo.IsEnableDynamicKey = isEnableDynamicKey; vWNInfo.RawVWirelessNetworkShowInfo = currentProcess.StandardOutput.ReadToEnd(); string[] kvpItems = vWNInfo.RawVWirelessNetworkShowInfo.Split(new char[] { '\r', '\n' }); if (kvpItems.Length > 14) { vWNInfo.BearerNetworkSettings = new PlatForm.BearerNetworkSettings() { Mode = kvpItems[6].Split(':')[1].Trim(), SSID = kvpItems[8].Split(':')[1].Trim().Trim(new char[] { '“', '”' }), MaxClientQuantity = int.Parse(kvpItems[10].Split(':')[1]), Authentication = kvpItems[12].Split(':')[1].Trim(), Key = this.isEnableDynamicKey ? kvpItems[14].Split(':')[1].Trim() : this.cleartextKey }; vWNInfo.BearerNetworkStatus = new BearerNetworkStatus(); string status = kvpItems[22].Split(':')[1].Trim(); vWNInfo.BearerNetworkStatus.Status = status; if (status == "已启动") { vWNInfo.BearerNetworkStatus.BSSID = kvpItems[24].Substring(28, 17); vWNInfo.BearerNetworkStatus.WirelessType = kvpItems[26].Split(':')[1].Trim(); vWNInfo.BearerNetworkStatus.Channels = int.Parse(kvpItems[28].Split(':')[1]); int clientQuantity = int.Parse(kvpItems[30].Split(':')[1]); vWNInfo.BearerNetworkStatus.ClientQuantity = clientQuantity; if (clientQuantity > 0) { for (int i = 1; i <= clientQuantity; i++) { vWNInfo.BearerNetworkStatus.Clients.Add(kvpItems[30 + i * 2].TrimStart().Substring(0, 17)); } } } } return vWNInfo; } public string GetIpAddress() { string ipV4Address = null; //获取虚拟无限网络的IPV4地址 NetworkInterface vNetwork = NetworkInterface.GetAllNetworkInterfaces().FirstOrDefault(w => w.Description == "Microsoft Hosted Network Virtual Adapter" && w.NetworkInterfaceType == NetworkInterfaceType.Wireless80211); UnicastIPAddressInformationCollection ipCollection = vNetwork.GetIPProperties().UnicastAddresses; if (ipCollection.Count > 1) { ipV4Address = ipCollection[1].Address.ToString(); } else { ipV4Address = ipCollection[0].Address.ToString(); } return ipV4Address; } protected virtual void OnVWirelessStarted(VWirelessNetworkEventArgs e) { if (VWirelessStarted != null) { VWirelessStarted(this, e); } } protected virtual void OnVWirelessStopped(VWirelessNetworkEventArgs e) { if (VWirelessStopped != null) { VWirelessStopped(this, e); } } protected virtual void OnVWirelessSetted(VWirelessNetworkEventArgs e) { if (VWirelessSetted != null) { VWirelessSetted(this, e); } } private static string GetDynamicVWirelessKey(string sSID, out string encryptPlus) { string encrypedSSID = GetHashedString32(sSID); ; string head = null; string tail = null; encryptPlus = Guid.NewGuid().ToString(); char[] chars = encryptPlus.ToCharArray(); for (int i = 0; i < chars.Length; i++) { if (i % 2 == 0) { head += chars[i]; } else { tail += chars[i]; } } string waitingEncryptString2 = head + encrypedSSID + tail; return GetHashedString32(waitingEncryptString2); } private static string GetHashedString32(string waitingEncryptString) { string encrypedString = null; byte[] buff = Encoding.UTF8.GetBytes(waitingEncryptString); MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); byte[] encryptedBuff = md5.ComputeHash(buff); foreach (byte b in encryptedBuff) { encrypedString += b.ToString("X2"); } return encrypedString; } }

/// <summary> /// 虚拟无线网络事件参数 /// </summary> public class VWirelessNetworkEventArgs : EventArgs { /// <summary> /// 命令执行后的结果 /// </summary> public string CommandExecutedResult { get; set; } /// <summary> /// 虚拟无限网络的IP地址 /// </summary> public string IPAddress { get; set; } /// <summary> /// 显示虚拟无线网络信息 /// </summary> public VWirelessNetwork VWirelessNetworkShowInfo { get; set; } } /// <summary> /// 虚拟无线网络信息 /// </summary> public class VWirelessNetwork { /// <summary> /// 显示虚拟无线网络原始信息 /// </summary> public string RawVWirelessNetworkShowInfo { get; set; } /// <summary> /// 是否启用虚拟无限网络动态生成密码 /// </summary> public bool IsEnableDynamicKey { get; set; } /// <summary> /// 承载虚拟无线网络设置 /// </summary> public BearerNetworkSettings BearerNetworkSettings { get; set; } /// <summary> /// 承载虚拟无线网络状态 /// </summary> public BearerNetworkStatus BearerNetworkStatus { get; set; } } /// <summary> /// 承载网络设置 /// </summary> public class BearerNetworkSettings { /// <summary> /// 模式 /// </summary> public string Mode { get; set; } /// <summary> /// SSID 名称 /// </summary> public string SSID { get; set; } /// <summary> /// 最多客户端数 /// </summary> public int MaxClientQuantity { get; set; } /// <summary> /// 身份验证 /// </summary> public string Authentication { get; set; } /// <summary> /// 密码 /// </summary> public string Key { get; set; } } /// <summary> /// 承载网络状态 /// </summary> public class BearerNetworkStatus { private IList<string> clients = new List<string>(); /// <summary> /// 状态 /// </summary> public string Status { get; set; } /// <summary> /// BSSID /// </summary> public string BSSID { get; set; } /// <summary> /// 无线电类型 /// </summary> public string WirelessType { get; set; } /// <summary> /// 频道 /// </summary> public int Channels { get; set; } /// <summary> /// 客户端数 /// </summary> public int ClientQuantity { get; set; } /// <summary> /// 客户端MAC地址列表 /// </summary> public IList<string> Clients { get { return clients; } } }

四、测试代码如下：

VWirelessNetworkManager vwifi = null; vwifi = new VWirelessNetworkManager(); vwifi.VWirelessSetted += Vwifi_VWirelessSetted; vwifi.VWirelessStarted += Vwifi_VWirelessStarted; vwifi.VWirelessStopped += Vwifi_VWirelessStopped; /// <summary> /// 窗口加载事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void FrmShowNetInfo_Load(object sender, EventArgs e) { //this.lstboxMessage.Items.Add("消息：正在启动应用程序！"); RunatVWirelessNetwork(); } private void RunatVWirelessNetwork() { // this.lstboxMessage.Items.Add("消息：正在检测是否安装USB版本的无限网卡！"); if (CheckWirelessCard()) { // this.lstboxMessage.Items.Add("消息：检测已经安装USB版本的无限网卡！"); if (GlobalConfig.AppSettings.VWirelessNetwork.IsEnableDynamicKey) { //this.lstboxMessage.Items.Add("消息：动态生成密码功能已开启，以规则运算方式并创建虚拟无限网络！"); vwifi.SetVWirelessInfo(string.Format("SmTR-{0}", DateTime.Now.ToString("HHmmssfffffff"))); } else { //this.lstboxMessage.Items.Add("消息：动态生成密码功能未开启，以明文密码方式并创建虚拟无限网络！"); vwifi.SetVWirelessInfo(string.Format("SmTR-{0}", DateTime.Now.ToString("HHmmssfffffff")), DateTime.Now.ToOADate().ToString()); } //this.lstboxMessage.Items.Add("消息：正在启动虚拟无限网络！"); vwifi.StartVWirelessNet(); } else { Application.Exit(); }

五、说明

最后测试部分的动态密码的意思是提供不公开密码的情况下，根据规则自动计算的，具体方法可以自己修改。