C# p2p（peer2peer）通信（基于PNRP协议）

 

PNRP Peer name Resolution Protocol对等名称解析协议，是由微软公司设计的基于IPv4和IPv6的点对点协议。PNRP云，这类云已被弃用,尽管它仍受 PNRP 支持。 云 PNRP 云由 Cloud 类的实例表示。 对等机使用的多组云由可枚举的 CloudCollection 类的实例表示。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Net.PeerToPeer;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace P2PTest230508
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Load += Form1_Load;
            button_regjster.Click += Button_regjster_Click;
            button_remove.Click += Button_remove_Click;
            button_search.Click += Button_search_Click;
            listView_result.View = View.Details;
            listView_result.Columns.Add("图标",10);
            listView_result.Columns.Add("位置",200);
            listView_result.Columns.Add("发布时间",200);
        }

        private void Button_search_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrWhiteSpace(textBox_searchName.Text))
            {
                return;
            }
            listView_result.Items.Clear();
            PeerName peerName = new PeerName(textBox_searchName.Text, PeerNameType.Unsecured);
            PeerNameResolver peerNameResolver = new PeerNameResolver();
            PeerNameRecordCollection peerNameRecords = peerNameResolver.Resolve(peerName);
            foreach (var record in peerNameRecords)
            {
                foreach (var ipe in record.EndPointCollection)
                {
                    if (ipe.AddressFamily==AddressFamily.InterNetwork)
                    {
                        ListViewItem item = new ListViewItem();
                        item.SubItems.Add(ipe.ToString());
                        item.SubItems.Add(Encoding.UTF8.GetString(record.Data));
                        listView_result.Items.Add(item);
                    }
                       
                    
                }
            }



        }

        private void Button_remove_Click(object sender, EventArgs e)
        {
            if (count==0)
            {
                return;
            }
            int index = listBox_share.SelectedIndex;
            if (index<0)
            {
                return;
            }
            for (int i = 0; i < count; i++)
            {
                if (string.Equals(peerNameRegistrations[i].Comment,listBox_share.Items[index].ToString()))
                {
                    peerNameRegistrations[i].Stop();
                    listBox_share.Items.RemoveAt(index);
                    break;
                }
            }


        }

        private void Button_regjster_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrWhiteSpace(textBox_resourceName.Text))
            {
                return;
            }
          
            //创建对等名
            PeerName peerName = new PeerName(textBox_resourceName.Text,PeerNameType.Unsecured);
            for (int i = 0; i < count; i++)
            {
                if (string.Equals(peerNameRegistrations[i].Comment, peerName.ToString()))
                {
                    MessageBox.Show($"{ textBox_resourceName.Text} 对等名已存在，不能重复注册");
                    return;
                }

            }
            //注册对等名
            peerNameRegistrations[count] = new PeerNameRegistration(peerName,Convert.ToInt32(textBox_localPort.Text));
            peerNameRegistrations[count].Comment = peerName.ToString();
            peerNameRegistrations[count].Data = Encoding.UTF8.GetBytes(DateTime.Now.ToString());
            peerNameRegistrations[count].Cloud = Cloud.Global;
            peerNameRegistrations[count].Start();
            count++;
            listBox_share.Items.Add(peerName.ToString());
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            IPAddress ip = Dns.GetHostEntry(Dns.GetHostName()).AddressList[0];
            textBox_localIp.Text = ip.MapToIPv4().ToString();
            int port = new Random().Next(10000, 50000);
            textBox_localPort.Text = port.ToString();
        }

        int count = 0;
        PeerNameRegistration[] peerNameRegistrations=new PeerNameRegistration[50];

    }
}