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/* -*- 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
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