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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_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 "nsHostResolver.h"
#include "nsThreadUtils.h"
#include "nsXULAppAPI.h"
#include "DNSPacket.h"
namespace mozilla {
namespace net {
class TRRService;
class TRRServiceChannel;
extern TRRService* gTRRService;
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)
: mozilla::Runnable("TRR"),
mRec(aRec),
mHostResolver(aResolver),
mType(aType),
mOriginSuffix(aRec->originSuffix) {
mHost = aRec->host;
mPB = aRec->pb;
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess() || XRE_IsSocketProcess(),
"TRR must be in parent or socket process");
}
// when following CNAMEs
explicit TRR(AHostResolver* aResolver, nsHostRecord* aRec, nsCString& aHost,
enum TrrType& aType, unsigned int aLoopCount, bool aPB)
: mozilla::Runnable("TRR"),
mHost(aHost),
mRec(aRec),
mHostResolver(aResolver),
mType(aType),
mPB(aPB),
mCnameLoop(aLoopCount),
mOriginSuffix(aRec ? aRec->originSuffix : ""_ns) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess() || XRE_IsSocketProcess(),
"TRR must be in parent or socket process");
}
// used on push
explicit TRR(AHostResolver* aResolver, bool aPB)
: mozilla::Runnable("TRR"),
mHostResolver(aResolver),
mType(TRRTYPE_A),
mPB(aPB) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess() || XRE_IsSocketProcess(),
"TRR must be in parent or socket process");
}
// to verify a domain
explicit TRR(AHostResolver* aResolver, nsACString& aHost, enum TrrType aType,
const nsACString& aOriginSuffix, bool aPB)
: mozilla::Runnable("TRR"),
mHost(aHost),
mRec(nullptr),
mHostResolver(aResolver),
mType(aType),
mPB(aPB),
mOriginSuffix(aOriginSuffix) {
MOZ_DIAGNOSTIC_ASSERT(XRE_IsParentProcess() || XRE_IsSocketProcess(),
"TRR must be in parent or socket process");
}
NS_IMETHOD Run() override;
void Cancel();
enum TrrType Type() { return mType; }
nsCString mHost;
RefPtr<nsHostRecord> mRec;
RefPtr<AHostResolver> mHostResolver;
private:
~TRR() = default;
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 blacklisted, 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 UseDefaultServer();
void SaveAdditionalRecords(
const nsClassHashtable<nsCStringHashKey, DOHresp>& aRecords);
nsresult CreateChannelHelper(nsIURI* aUri, nsIChannel** aResult);
friend class TRRServiceChannel;
static nsresult SetupTRRServiceChannelInternal(nsIHttpChannel* aChannel,
bool aUseGet);
void StoreIPHintAsDNSRecord(const struct SVCB& aSVCBRecord);
nsCOMPtr<nsIChannel> mChannel;
enum TrrType mType;
DNSPacket mPacket;
bool mFailed = false;
bool mPB;
DOHresp mDNS;
nsCOMPtr<nsITimer> mTimeout;
nsCString mCname;
uint32_t mCnameLoop = kCnameChaseMax; // loop detection counter
uint32_t mTTL = UINT32_MAX;
TypeRecordResultType mResult = mozilla::AsVariant(Nothing());
nsHostRecord::TRRSkippedReason mTRRSkippedReason = nsHostRecord::TRR_UNSET;
void RecordReason(nsHostRecord::TRRSkippedReason reason) {
if (mTRRSkippedReason == nsHostRecord::TRR_UNSET) {
mTRRSkippedReason = reason;
}
}
// keep a copy of the originSuffix for the cases where mRec == nullptr */
const nsCString mOriginSuffix;
};
} // namespace net
} // namespace mozilla
#endif // include guard
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