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-rw-r--r--netwerk/dns/TRRQuery.h111
1 files changed, 111 insertions, 0 deletions
diff --git a/netwerk/dns/TRRQuery.h b/netwerk/dns/TRRQuery.h
new file mode 100644
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+++ b/netwerk/dns/TRRQuery.h
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#ifndef mozilla_net_TRRQuery_h
+#define mozilla_net_TRRQuery_h
+
+#include "nsHostResolver.h"
+#include "DNSPacket.h"
+
+namespace mozilla {
+namespace net {
+
+class TRRQuery : public AHostResolver {
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TRRQuery, override)
+
+ public:
+ TRRQuery(nsHostResolver* aHostResolver, nsHostRecord* aHostRecord)
+ : mHostResolver(aHostResolver),
+ mRecord(aHostRecord),
+ mTrrLock("TRRQuery.mTrrLock") {}
+
+ nsresult DispatchLookup(TRR* pushedTRR = nullptr);
+
+ void Cancel(nsresult aStatus);
+
+ enum TRRState { INIT, STARTED, OK, FAILED };
+ TRRState mTrrAUsed = INIT;
+ TRRState mTrrAAAAUsed = INIT;
+
+ TRRSkippedReason mTRRAFailReason = TRRSkippedReason::TRR_UNSET;
+ TRRSkippedReason mTRRAAAAFailReason = TRRSkippedReason::TRR_UNSET;
+
+ virtual LookupStatus CompleteLookup(nsHostRecord*, nsresult,
+ mozilla::net::AddrInfo*, bool pb,
+ const nsACString& aOriginsuffix,
+ nsHostRecord::TRRSkippedReason aReason,
+ TRR* aTRRRequest) override;
+ virtual LookupStatus CompleteLookupByType(
+ nsHostRecord*, nsresult, mozilla::net::TypeRecordResultType& aResult,
+ mozilla::net::TRRSkippedReason aReason, uint32_t aTtl, bool pb) override;
+ virtual nsresult GetHostRecord(const nsACString& host,
+ const nsACString& aTrrServer, uint16_t type,
+ nsIDNSService::DNSFlags flags, uint16_t af,
+ bool pb, const nsCString& originSuffix,
+ nsHostRecord** result) override {
+ if (!mHostResolver) {
+ return NS_ERROR_FAILURE;
+ }
+ return mHostResolver->GetHostRecord(host, aTrrServer, type, flags, af, pb,
+ originSuffix, result);
+ }
+ virtual nsresult TrrLookup_unlocked(
+ nsHostRecord* rec, mozilla::net::TRR* pushedTRR = nullptr) override {
+ if (!mHostResolver) {
+ return NS_ERROR_FAILURE;
+ }
+ return mHostResolver->TrrLookup_unlocked(rec, pushedTRR);
+ }
+ virtual void MaybeRenewHostRecord(nsHostRecord* aRec) override {
+ if (!mHostResolver) {
+ return;
+ }
+ mHostResolver->MaybeRenewHostRecord(aRec);
+ }
+
+ mozilla::TimeDuration Duration() { return mTrrDuration; }
+
+ private:
+ nsresult DispatchByTypeLookup(TRR* pushedTRR = nullptr);
+
+ private:
+ ~TRRQuery() = default;
+
+ void MarkSendingTRR(TRR* trr, TrrType rectype, MutexAutoLock&);
+ void PrepareQuery(TrrType aRecType, nsTArray<RefPtr<TRR>>& aRequestsToSend);
+ bool SendQueries(nsTArray<RefPtr<TRR>>& aRequestsToSend);
+
+ RefPtr<nsHostResolver> mHostResolver;
+ RefPtr<nsHostRecord> mRecord;
+
+ Mutex mTrrLock
+ MOZ_UNANNOTATED; // lock when accessing the mTrrA[AAA] pointers
+ RefPtr<mozilla::net::TRR> mTrrA;
+ RefPtr<mozilla::net::TRR> mTrrAAAA;
+ RefPtr<mozilla::net::TRR> mTrrByType;
+ // |mTRRRequestCounter| indicates the number of TRR requests that were
+ // dispatched sucessfully. Generally, this counter is increased to 2 after
+ // mTrrA and mTrrAAAA are dispatched, and is decreased by 1 when
+ // CompleteLookup is called. Note that nsHostResolver::CompleteLookup is only
+ // called when this counter equals to 0.
+ Atomic<uint32_t> mTRRRequestCounter{0};
+
+ uint8_t mTRRSuccess = 0; // number of successful TRR responses
+ bool mCalledCompleteLookup = false;
+
+ mozilla::TimeDuration mTrrDuration;
+ mozilla::TimeStamp mTrrStart;
+
+ RefPtr<mozilla::net::AddrInfo> mAddrInfoA;
+ RefPtr<mozilla::net::AddrInfo> mAddrInfoAAAA;
+ nsresult mAResult = NS_OK;
+ nsresult mAAAAResult = NS_OK;
+};
+
+} // namespace net
+} // namespace mozilla
+
+#endif // mozilla_net_TRRQuery_h