问题
I scanned through my local home network using Bonjour 1.0
(.NET) for services with regtype = "_http._tcp"
:
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);
When I find the service the method: static void eventManager_ServiceFound(DNSSDService browser, DNSSDFlags flags, uint ifIndex, string serviceName, string regtype, string domain)
is invoked.
Then in that method I want to use method: DNSSDService GetAddrInfo(DNSSDFlags glags, uint ifIndex, DNSSDAddressFamily addressFamily,
string hostname
, DNSSDEventManager eventManager)
to get to know service's ip address and port.
The problem is that I do not know know what string hostname
should be and thus I do not get any results: ** Please look at the: ???WHAT HERE?? in the code**
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("----------------------------------------");
}
Output:
browser: System.__ComObject
DNSSDFlags 2
ifIndex 32
serviceName: AXIS M1011-W - 00408CBEEAE5
regtype: _http._tcp.
domain: local.
Full code:
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("----------------------------------------");
}
}
}
回答1:
Something that I'd check first is the TXT record associated with the _http._tcp record. From the screenshot you have the _axis-video._tcp selected and it shows you the macaddress associated with it. Many _http._tcp entries record the url needed to get to it, or the port/ipaddress needed. I'd dig into that first.
Otherwise you may have to resolve the macaddress into an ipaddress. I googled and come with http://www.mostthingsweb.com/2011/11/reading-arp-entries-with-c/
来源:https://stackoverflow.com/questions/21065459/what-is-the-hostname-while-invoking-getaddrinfo-in-bonjour-1-0