在C#中实现UPnP协议,你可以使用开源库或者自己编写代码
Open.Nat
。要使用这个库,首先需要通过NuGet安装它:Install-Package Open.NAT
然后,你可以使用以下代码来实现UPnP协议:
using System;
using System.Net;
using System.Threading.Tasks;
using Open.Nat;
namespace UPnPExample
{
class Program
{
static async Task Main(string[] args)
{
// 获取NAT设备
var nat = await NatDiscoverer.DiscoverDeviceAsync();
// 获取本地IP地址
IPAddress localAddress = IPAddress.Parse("192.168.1.100");
// 映射端口
int externalPort = 12345;
int internalPort = 12345;
Protocol protocol = Protocol.Tcp;
string description = "My UPnP Application";
await nat.CreatePortMapAsync(new Mapping(protocol, internalPort, externalPort, description));
Console.WriteLine($"Port {externalPort} mapped successfully.");
}
}
}
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace UPnPExample
{
class Program
{
static void Main(string[] args)
{
// 创建一个UDP客户端
using (var client = new UdpClient())
{
// 设置客户端的TTL(Time to Live)值
client.Ttl = 1;
// 创建一个SSDP M-SEARCH消息
string searchMessage = "M-SEARCH * HTTP/1.1\r\n" +
"HOST: 239.255.255.250:1900\r\n" +
"MAN: \"ssdp:discover\"\r\n" +
"MX: 3\r\n" +
"ST: upnp:rootdevice\r\n" +
"\r\n";
// 将消息转换为字节数组
byte[] searchMessageBytes = Encoding.ASCII.GetBytes(searchMessage);
// 将消息发送到SSDP多播地址和端口
IPEndPoint multicastEndPoint = new IPEndPoint(IPAddress.Parse("239.255.255.250"), 1900);
client.Send(searchMessageBytes, searchMessageBytes.Length, multicastEndPoint);
// 接收响应
while (true)
{
try
{
IPEndPoint remoteEndPoint = new IPEndPoint(IPAddress.Any, 0);
byte[] responseBytes = client.Receive(ref remoteEndPoint);
string response = Encoding.ASCII.GetString(responseBytes);
Console.WriteLine($"Received response from {remoteEndPoint}:");
Console.WriteLine(response);
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.TimedOut)
{
break;
}
else
{
throw;
}
}
}
}
}
}
}
请注意,这只是一个简单的示例,用于展示如何发送SSDP M-SEARCH消息。要实现完整的UPnP协议,你需要处理更多的细节,例如解析设备描述文档、控制操作等。建议查阅UPnP协议的官方文档以获取更多信息。