在 Bonjour 1.0 中调用 GetAddrInfo(....) 时的主机名是什么

Question

我使用Bonjour 1.0(.NET) 通过我的本地家庭网络扫描regtype = "_http._tcp" 的服务：

 DNSSDService service = new DNSSDService();
            DNSSDEventManager eventManager = new DNSSDEventManager();
            eventManager.ServiceFound += new _IDNSSDEvents_ServiceFoundEventHandler(eventManager_ServiceFound);
            DNSSDService browse = service.Browse(0, 0, "_http._tcp", null, eventManager);

当我找到服务时，方法：static void eventManager_ServiceFound(DNSSDService browser, DNSSDFlags flags, uint ifIndex, string serviceName, string regtype, string domain) 被调用。

然后在那个方法中我想使用方法：DNSSDService GetAddrInfo(DNSSDFlags glags, uint ifIndex, DNSSDAddressFamily addressFamily,string hostname, DNSSDEventManager eventManager)来了解服务的IP地址和端口。

问题是我不知道 string hostname 应该是什么，因此我没有得到任何结果：** 请看：？？ ？这里有什么？在代码中**

 static void eventManager_ServiceFound(DNSSDService browser, DNSSDFlags flags, uint ifIndex, string serviceName, string regtype, string domain) {
            Console.WriteLine("browser: " + browser + "\nDNSSDFlags " +  flags+ "\nifIndex " + ifIndex +"\nserviceName: " + serviceName + "\nregtype: " +regtype+ "\ndomain: "+ domain);
            DNSSDEventManager eventManager = new DNSSDEventManager();
            eventManager.AddressFound += new _IDNSSDEvents_AddressFoundEventHandler(eventManager_AddressFound);
            DNSSDAddressFamily family = new DNSSDAddressFamily();
            browser.GetAddrInfo(flags, ifIndex, family, ???WHAT HERE???, eventManager);
        }

        private static void eventManager_AddressFound(DNSSDService service, DNSSDFlags flags, uint ifIndex, string hostname, DNSSDAddressFamily addressFamily, string address, uint ttl) {
            Console.WriteLine("----------------------------------------");
            Console.WriteLine("FOUND THE ADDRESS");
            Console.WriteLine("----------------------------------------");
        }

输出：

browser: System.__ComObject
DNSSDFlags 2
ifIndex 32
serviceName: AXIS M1011-W - 00408CBEEAE5
regtype: _http._tcp.
domain: local.

完整代码：

using Bonjour;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace WindowsFormsApplication1 {
    static class Program {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() {
            DNSSDService service = new DNSSDService();
            DNSSDEventManager eventManager = new DNSSDEventManager();
            eventManager.ServiceFound += new _IDNSSDEvents_ServiceFoundEventHandler(eventManager_ServiceFound);
         //   DNSSDService browse = service.Browse(0, 0, "_axis-video._tcp", null, eventManager);
            DNSSDService browse = service.Browse(0, 0, "_http._tcp", null, eventManager);


            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
        static void eventManager_ServiceFound(DNSSDService browser, DNSSDFlags flags, uint ifIndex, string serviceName, string regtype, string domain) {
            Console.WriteLine("browser: " + browser + "\nDNSSDFlags " +  flags+ "\nifIndex " + ifIndex +"\nserviceName: " + serviceName + "\nregtype: " +regtype+ "\ndomain: "+ domain);
            DNSSDEventManager eventManager = new DNSSDEventManager();
            eventManager.AddressFound += new _IDNSSDEvents_AddressFoundEventHandler(eventManager_AddressFound);
            DNSSDAddressFamily family = new DNSSDAddressFamily();
            browser.GetAddrInfo(flags, ifIndex, family, ?????WHAT HERE?????, eventManager);
        }

        private static void eventManager_AddressFound(DNSSDService service, DNSSDFlags flags, uint ifIndex, string hostname, DNSSDAddressFamily addressFamily, string address, uint ttl) {
            Console.WriteLine("----------------------------------------");
            Console.WriteLine("FOUND ADDRESS");
            Console.WriteLine("----------------------------------------");
        }



    }
}

Answer 1

我首先要检查的是与 _http._tcp 记录关联的 TXT 记录。从屏幕截图中，您选择了 _axis-video._tcp，它会显示与之关联的 macaddress。许多 _http._tcp 条目记录了访问它所需的 url，或所需的端口/IP 地址。我会先深入研究。

否则您可能必须将 macaddress 解析为 ipaddress。我用谷歌搜索了http://www.mostthingsweb.com/2011/11/reading-arp-entries-with-c/