From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- netwerk/dns/TRR.h | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 netwerk/dns/TRR.h (limited to 'netwerk/dns/TRR.h') diff --git a/netwerk/dns/TRR.h b/netwerk/dns/TRR.h new file mode 100644 index 0000000000..82244c97a0 --- /dev/null +++ b/netwerk/dns/TRR.h @@ -0,0 +1,159 @@ +/* -*- 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_TRR_h +#define mozilla_net_TRR_h + +#include "mozilla/net/DNSByTypeRecord.h" +#include "mozilla/Assertions.h" +#include "nsClassHashtable.h" +#include "nsIChannel.h" +#include "nsIHttpPushListener.h" +#include "nsIInterfaceRequestor.h" +#include "nsIStreamListener.h" +#include "nsThreadUtils.h" +#include "nsXULAppAPI.h" +#include "DNSPacket.h" +#include "nsITRRSkipReason.h" + +class AHostResolver; +class nsHostRecord; + +namespace mozilla { +namespace net { + +class TRRService; +class TRRServiceChannel; + +class TRR : public Runnable, + public nsITimerCallback, + public nsIHttpPushListener, + public nsIInterfaceRequestor, + public nsIStreamListener { + public: + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_NSIHTTPPUSHLISTENER + NS_DECL_NSIINTERFACEREQUESTOR + NS_DECL_NSIREQUESTOBSERVER + NS_DECL_NSISTREAMLISTENER + NS_DECL_NSITIMERCALLBACK + + // Number of "steps" we follow CNAME chains + static const unsigned int kCnameChaseMax = 64; + + // when firing off a normal A or AAAA query + explicit TRR(AHostResolver* aResolver, nsHostRecord* aRec, + enum TrrType aType); + // when following CNAMEs + explicit TRR(AHostResolver* aResolver, nsHostRecord* aRec, nsCString& aHost, + enum TrrType& aType, unsigned int aLoopCount, bool aPB); + // used on push + explicit TRR(AHostResolver* aResolver, bool aPB); + // to verify a domain + explicit TRR(AHostResolver* aResolver, nsACString& aHost, enum TrrType aType, + const nsACString& aOriginSuffix, bool aPB, + bool aUseFreshConnection); + + NS_IMETHOD Run() override; + void Cancel(nsresult aStatus); + enum TrrType Type() { return mType; } + nsCString mHost; + RefPtr mRec; + RefPtr mHostResolver; + + void SetTimeout(uint32_t aTimeoutMs) { mTimeoutMs = aTimeoutMs; } + + nsresult ChannelStatus() { return mChannelStatus; } + + enum RequestPurpose { + Resolve, + Confirmation, + Blocklist, + }; + + RequestPurpose Purpose() { return mPurpose; } + void SetPurpose(RequestPurpose aPurpose) { mPurpose = aPurpose; } + TRRSkippedReason SkipReason() const { return mTRRSkippedReason; } + + protected: + virtual ~TRR() = default; + virtual DNSPacket* GetOrCreateDNSPacket(); + virtual nsresult CreateQueryURI(nsIURI** aOutURI); + virtual const char* ContentType() const { return "application/dns-message"; } + virtual DNSResolverType ResolverType() const { return DNSResolverType::TRR; } + virtual bool MaybeBlockRequest(); + virtual void RecordProcessingTime(nsIChannel* aChannel); + virtual void ReportStatus(nsresult aStatusCode); + virtual void HandleTimeout(); + virtual void HandleEncodeError(nsresult aStatusCode) {} + virtual void HandleDecodeError(nsresult aStatusCode); + nsresult SendHTTPRequest(); + nsresult ReturnData(nsIChannel* aChannel); + + // FailData() must be called to signal that the asynch TRR resolve is + // completed. For failed name resolves ("no such host"), the 'error' it + // passses on in its argument must be NS_ERROR_UNKNOWN_HOST. Other errors + // (if host was blocklisted, there as a bad content-type received, etc) + // other error codes must be used. This distinction is important for the + // subsequent logic to separate the error reasons. + nsresult FailData(nsresult error); + static nsresult DohDecodeQuery(const nsCString& query, nsCString& host, + enum TrrType& type); + nsresult ReceivePush(nsIHttpChannel* pushed, nsHostRecord* pushedRec); + nsresult On200Response(nsIChannel* aChannel); + nsresult FollowCname(nsIChannel* aChannel); + + bool HasUsableResponse(); + + bool UseDefaultServer(); + void SaveAdditionalRecords( + const nsClassHashtable& aRecords); + + friend class TRRServiceChannel; + static nsresult SetupTRRServiceChannelInternal( + nsIHttpChannel* aChannel, bool aUseGet, const nsACString& aContentType); + + void StoreIPHintAsDNSRecord(const struct SVCB& aSVCBRecord); + + nsCOMPtr mChannel; + enum TrrType mType { TRRTYPE_A }; + UniquePtr mPacket; + bool mFailed = false; + bool mPB = false; + DOHresp mDNS; + nsresult mChannelStatus = NS_OK; + + RequestPurpose mPurpose = Resolve; + Atomic mCancelled{false}; + + // The request timeout in milliseconds. If 0 we will use the default timeout + // we get from the prefs. + uint32_t mTimeoutMs = 0; + nsCOMPtr mTimeout; + nsCString mCname; + uint32_t mCnameLoop = kCnameChaseMax; // loop detection counter + + uint32_t mTTL = UINT32_MAX; + TypeRecordResultType mResult = mozilla::AsVariant(Nothing()); + + TRRSkippedReason mTRRSkippedReason = TRRSkippedReason::TRR_UNSET; + void RecordReason(TRRSkippedReason reason) { + if (mTRRSkippedReason == TRRSkippedReason::TRR_UNSET) { + mTRRSkippedReason = reason; + } + } + + // keep a copy of the originSuffix for the cases where mRec == nullptr */ + const nsCString mOriginSuffix; + + // If true, we set LOAD_FRESH_CONNECTION on our channel's load flags. + bool mUseFreshConnection = false; +}; + +} // namespace net +} // namespace mozilla + +#endif // include guard -- cgit v1.2.3