import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/dns/DNSRequestParent.cpp

@@ -0,0 +1,132 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et tw=80 : */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/net/DNSRequestParent.h"
+#include "nsIDNSService.h"
+#include "nsNetCID.h"
+#include "nsThreadUtils.h"
+#include "nsIServiceManager.h"
+#include "nsICancelable.h"
+#include "nsIDNSRecord.h"
+#include "nsHostResolver.h"
+#include "mozilla/Unused.h"
+
+using namespace mozilla::ipc;
+
+namespace mozilla {
+namespace net {
+
+DNSRequestParent::DNSRequestParent()
+  : mFlags(0)
+  , mIPCClosed(false)
+{
+
+}
+
+DNSRequestParent::~DNSRequestParent()
+{
+
+}
+
+void
+DNSRequestParent::DoAsyncResolve(const nsACString &hostname, uint32_t flags,
+                                 const nsACString &networkInterface)
+{
+  nsresult rv;
+  mFlags = flags;
+  nsCOMPtr<nsIDNSService> dns = do_GetService(NS_DNSSERVICE_CONTRACTID, &rv);
+  if (NS_SUCCEEDED(rv)) {
+    nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
+    nsCOMPtr<nsICancelable> unused;
+    rv = dns->AsyncResolveExtended(hostname, flags, networkInterface, this,
+                                   mainThread, getter_AddRefs(unused));
+  }
+
+  if (NS_FAILED(rv) && !mIPCClosed) {
+    mIPCClosed = true;
+    Unused << SendLookupCompleted(DNSRequestResponse(rv));
+  }
+}
+
+bool
+DNSRequestParent::RecvCancelDNSRequest(const nsCString& hostName,
+                                       const uint32_t& flags,
+                                       const nsCString& networkInterface,
+                                       const nsresult& reason)
+{
+  nsresult rv;
+  nsCOMPtr<nsIDNSService> dns = do_GetService(NS_DNSSERVICE_CONTRACTID, &rv);
+  if (NS_SUCCEEDED(rv)) {
+    rv = dns->CancelAsyncResolveExtended(hostName, flags, networkInterface,
+                                         this, reason);
+  }
+  return true;
+}
+
+bool
+DNSRequestParent::Recv__delete__()
+{
+  mIPCClosed = true;
+  return true;
+}
+
+void
+DNSRequestParent::ActorDestroy(ActorDestroyReason why)
+{
+  // We may still have refcount>0 if DNS hasn't called our OnLookupComplete
+  // yet, but child process has crashed.  We must not send any more msgs
+  // to child, or IPDL will kill chrome process, too.
+  mIPCClosed = true;
+}
+//-----------------------------------------------------------------------------
+// DNSRequestParent::nsISupports
+//-----------------------------------------------------------------------------
+
+NS_IMPL_ISUPPORTS(DNSRequestParent,
+                  nsIDNSListener)
+
+//-----------------------------------------------------------------------------
+// nsIDNSListener functions
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+DNSRequestParent::OnLookupComplete(nsICancelable *request,
+                                   nsIDNSRecord  *rec,
+                                   nsresult       status)
+{
+  if (mIPCClosed) {
+    // nothing to do: child probably crashed
+    return NS_OK;
+  }
+
+  if (NS_SUCCEEDED(status)) {
+    MOZ_ASSERT(rec);
+
+    nsAutoCString cname;
+    if (mFlags & nsHostResolver::RES_CANON_NAME) {
+      rec->GetCanonicalName(cname);
+    }
+
+    // Get IP addresses for hostname (use port 80 as dummy value for NetAddr)
+    NetAddrArray array;
+    NetAddr addr;
+    while (NS_SUCCEEDED(rec->GetNextAddr(80, &addr))) {
+      array.AppendElement(addr);
+    }
+
+    Unused << SendLookupCompleted(DNSRequestResponse(DNSRecord(cname, array)));
+  } else {
+    Unused << SendLookupCompleted(DNSRequestResponse(status));
+  }
+
+  mIPCClosed = true;
+  return NS_OK;
+}
+
+
+
+} // namespace net
+} // namespace mozilla