public void DnsResolver_Multiple_Lookup()
{
// This test issues simultanious A queries for the 13
// global name servers and then verifies that the DnsResolver
// was able to correctly correlate the responses to the
// requests.
IPAddress dns = GetDns();
string[] gtld = new string[] {
"a.gtld-servers.net.",
"b.gtld-servers.net.",
"c.gtld-servers.net.",
"d.gtld-servers.net.",
"e.gtld-servers.net.",
"f.gtld-servers.net.",
"g.gtld-servers.net.",
"h.gtld-servers.net.",
"i.gtld-servers.net.",
"j.gtld-servers.net.",
"k.gtld-servers.net.",
"l.gtld-servers.net.",
"m.gtld-servers.net.",
};
DnsRequest[] requests = new DnsRequest[gtld.Length];
DnsResponse[] responses = new DnsResponse[gtld.Length];
IAsyncResult[] rgAR = new IAsyncResult[gtld.Length];
for (int j = 0; j < 10; j++)
{
// Repeat the test 10 times just for fun
for (int i = 0; i < gtld.Length; i++)
{
requests[i] = new DnsRequest(DnsFlag.RD, gtld[i], DnsQType.A);
}
for (int i = 0; i < gtld.Length; i++)
{
rgAR[i] = DnsResolver.BeginQuery(dns, requests[i], timeout, null, null);
}
for (int i = 0; i < gtld.Length; i++)
{
responses[i] = DnsResolver.EndQuery(rgAR[i]);
}
for (int i = 0; i < gtld.Length; i++)
{
Assert.AreEqual(requests[i].QID, responses[i].QID);
Assert.AreEqual(requests[i].QName, responses[i].QName);
}
}
}
public void DnsResolver_CancelAll()
{
IPAddress dns = IPAddress.Loopback;
DnsRequest request;
DnsResponse response;
IAsyncResult ar;
// This test sends a DNS request to the loopback address
// assuming that there is no DNS server running locally
// and then calls DnsResolver.CancelAll() which should
// terminate the query with a CancelException.
request = new DnsRequest(DnsFlag.RD, "www.lilltek.com.", DnsQType.A);
ar = DnsResolver.BeginQuery(dns, request, timeout, null, null);
DnsResolver.CancelAll();
try
{
response = DnsResolver.EndQuery(ar);
Assert.Fail("Expected a CancelException");
}
catch (CancelException)
{
}
catch
{
Assert.Fail("Expected a CancelException");
}
finally
{
Thread.Sleep(1000); // $todo(jeff.lill):
// This test causes some problems for some other
//tests unless I add this (I'm not sure why).
}
}
public void DnsResolver_Multiple_Lookup_Bind()
{
// This test repeats the A_Multiple test, but this time
// after binding the DnsResolver to 5 client side sockets.
IPAddress dns = GetDns();
string[] gtld = new string[] {
"a.gtld-servers.net.",
"b.gtld-servers.net.",
"c.gtld-servers.net.",
"d.gtld-servers.net.",
"e.gtld-servers.net.",
"f.gtld-servers.net.",
"g.gtld-servers.net.",
"h.gtld-servers.net.",
"i.gtld-servers.net.",
"j.gtld-servers.net.",
"k.gtld-servers.net.",
"l.gtld-servers.net.",
"m.gtld-servers.net.",
};
DnsRequest[] requests = new DnsRequest[gtld.Length];
DnsResponse[] responses = new DnsResponse[gtld.Length];
IAsyncResult[] rgAR = new IAsyncResult[gtld.Length];
IPEndPoint[] clientEPs;
clientEPs = new IPEndPoint[10];
for (int i = 0; i < clientEPs.Length; i++)
{
clientEPs[i] = new IPEndPoint(IPAddress.Any, 0);
}
DnsResolver.Bind(clientEPs, 128 * 1024, 128 * 1024);
try
{
for (int j = 0; j < 10; j++)
{
// Repeat the test 10 times just for fun
for (int i = 0; i < gtld.Length; i++)
{
requests[i] = new DnsRequest(DnsFlag.RD, gtld[i], DnsQType.A);
}
for (int i = 0; i < gtld.Length; i++)
{
rgAR[i] = DnsResolver.BeginQuery(dns, requests[i], timeout, null, null);
}
for (int i = 0; i < gtld.Length; i++)
{
responses[i] = DnsResolver.EndQuery(rgAR[i]);
}
for (int i = 0; i < gtld.Length; i++)
{
Assert.AreEqual(requests[i].QID, responses[i].QID);
Assert.AreEqual(requests[i].QName, responses[i].QName);
}
}
}
finally
{
DnsResolver.Bind();
}
}