100 lines
3.4 KiB
Plaintext
100 lines
3.4 KiB
Plaintext
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///////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: DNSExpManager.gs
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// Note: Provider-side helper for the IP Channel Contract
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//
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using System.Threading;
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using System.Net.IP;
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using Microsoft.SingSharp;
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using Microsoft.Singularity;
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using Microsoft.Singularity.Channels;
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using Microsoft.Singularity.Directory;
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using NetStack.Contracts;
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using NetStack.Runtime;
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using System.Collections;
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using System;
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namespace NetStack.Channels.Private
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{
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public class DNSExpManager
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{
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public void Run()
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{
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// Here is the channel we use to communicate with
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// the NameServer
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ServiceProviderContract.Imp! nsImp;
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ServiceProviderContract.Exp! nsExp;
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ServiceProviderContract.NewChannel(out nsImp, out nsExp);
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// Here is our NameServer connection over which we
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// receive new client channels. When we become a
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// process, this will be present automatically,
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// somehow.
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DirectoryServiceContract.Imp epNS = DirectoryService.NewClientEndpoint();
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try {
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epNS.SendRegister(Bitter.FromString2(DNSContract.ModuleName), nsImp);
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switch receive {
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case epNS.AckRegister() :
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// All is well.
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break;
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case epNS.NakRegister(ServiceProviderContract.Imp:Start rejectedEP, error) :
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// All is very much not well; abort.
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DebugStub.Print("Failed to register the DNS module.\n");
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delete rejectedEP;
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delete nsExp;
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return;
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break;
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}
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}
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finally {
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delete epNS;
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}
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while(true) {
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switch receive {
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case nsExp.Connect(ServiceContract.Exp:Start! newEp) :
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{
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// We expect people to give us DNSContract.Exp instances
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DNSContract.Exp newDnsEp = newEp as DNSContract.Exp;
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if (newDnsEp == null) {
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// Invalid contract type. Fail.
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nsExp.SendNackConnect(newEp);
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}
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else {
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// Signal ready and start servicing this contract
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nsExp.SendAckConnect();
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newDnsEp.SendReady();
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// Spin up a new servicing thread
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DNSExpConnection newConn = new DNSExpConnection(newDnsEp);
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newConn.Start();
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}
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}
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break;
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case nsExp.ChannelClosed():
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// Exit this thread
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delete nsExp;
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return;
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}
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}
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}
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public void Start()
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{
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Thread newThread = new Thread(new ThreadStart(Run));
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newThread.Start();
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}
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}
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}
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