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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
// HttpLog.h should generally be included first
#include "HttpLog.h"
#include "HTTPSRecordResolver.h"
#include "mozilla/Components.h"
#include "mozilla/StaticPrefs_network.h"
#include "nsIDNSByTypeRecord.h"
#include "nsIDNSAdditionalInfo.h"
#include "nsIDNSService.h"
#include "nsHttpConnectionInfo.h"
#include "nsNetCID.h"
#include "nsAHttpTransaction.h"
#include "nsServiceManagerUtils.h"
namespace mozilla {
namespace net {
NS_IMPL_ISUPPORTS(HTTPSRecordResolver, nsIDNSListener)
HTTPSRecordResolver::HTTPSRecordResolver(nsAHttpTransaction* aTransaction)
: mTransaction(aTransaction), mConnInfo(aTransaction->ConnectionInfo()) {}
HTTPSRecordResolver::~HTTPSRecordResolver() = default;
nsresult HTTPSRecordResolver::FetchHTTPSRRInternal(
nsIEventTarget* aTarget, nsICancelable** aDNSRequest) {
NS_ENSURE_ARG_POINTER(aTarget);
// Only fetch HTTPS RR for https.
if (!mConnInfo->FirstHopSSL()) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDNSService> dns = mozilla::components::DNS::Service();
if (!dns) {
return NS_ERROR_NOT_AVAILABLE;
}
nsIDNSService::DNSFlags flags =
nsIDNSService::GetFlagsFromTRRMode(mConnInfo->GetTRRMode());
if (mTransaction->Caps() & NS_HTTP_REFRESH_DNS) {
flags |= nsIDNSService::RESOLVE_BYPASS_CACHE;
}
nsCOMPtr<nsIDNSAdditionalInfo> info;
if (mConnInfo->OriginPort() != NS_HTTPS_DEFAULT_PORT) {
dns->NewAdditionalInfo(""_ns, mConnInfo->OriginPort(),
getter_AddRefs(info));
}
MutexAutoLock lock(mMutex);
nsresult rv = dns->AsyncResolveNative(
mConnInfo->GetOrigin(), nsIDNSService::RESOLVE_TYPE_HTTPSSVC, flags, info,
this, aTarget, mConnInfo->GetOriginAttributes(),
getter_AddRefs(mHTTPSRecordRequest));
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsICancelable> request = mHTTPSRecordRequest;
request.forget(aDNSRequest);
if (!StaticPrefs::network_dns_https_rr_check_record_with_cname()) {
return rv;
}
rv = dns->AsyncResolveNative(
mConnInfo->GetOrigin(), nsIDNSService::RESOLVE_TYPE_DEFAULT,
flags | nsIDNSService::RESOLVE_CANONICAL_NAME, nullptr, this, aTarget,
mConnInfo->GetOriginAttributes(), getter_AddRefs(mCnameRequest));
return rv;
}
NS_IMETHODIMP HTTPSRecordResolver::OnLookupComplete(nsICancelable* aRequest,
nsIDNSRecord* aRecord,
nsresult aStatus) {
MutexAutoLock lock(mMutex);
if (!mTransaction || mDone) {
// The transaction is not interesed in a response anymore.
mCnameRequest = nullptr;
mHTTPSRecordRequest = nullptr;
return NS_OK;
}
if (aRequest == mHTTPSRecordRequest) {
nsCOMPtr<nsIDNSHTTPSSVCRecord> record = do_QueryInterface(aRecord);
mHTTPSRecordRequest = nullptr;
if (!record || NS_FAILED(aStatus)) {
// When failed, we don't want to wait for the CNAME.
mCnameRequest = nullptr;
MutexAutoUnlock unlock(mMutex);
return InvokeCallback();
}
mHTTPSRecord = record;
// Waiting for the address record.
if (mCnameRequest) {
return NS_OK;
}
MutexAutoUnlock unlock(mMutex);
return InvokeCallback();
}
// Having mCnameRequest indicates that we are interested in the address
// record.
if (mCnameRequest && aRequest == mCnameRequest) {
nsCOMPtr<nsIDNSAddrRecord> addrRecord = do_QueryInterface(aRecord);
mCnameRequest = nullptr;
if (!addrRecord || NS_FAILED(aStatus)) {
// If we are still waiting for HTTPS RR, don't invoke the callback.
if (mHTTPSRecordRequest) {
return NS_OK;
}
MutexAutoUnlock unlock(mMutex);
return InvokeCallback();
}
mAddrRecord = addrRecord;
// Waiting for the HTTPS record.
if (mHTTPSRecordRequest) {
return NS_OK;
}
MutexAutoUnlock unlock(mMutex);
return InvokeCallback();
}
return NS_OK;
}
nsresult HTTPSRecordResolver::InvokeCallback() {
MOZ_ASSERT(!mDone);
mDone = true;
if (!mHTTPSRecord) {
return mTransaction->OnHTTPSRRAvailable(nullptr, nullptr, ""_ns);
}
nsCString cname;
if (mAddrRecord) {
(void)mAddrRecord->GetCanonicalName(cname);
}
// Make sure we use the updated caps from the transaction.
uint32_t caps = mTransaction->Caps();
nsCOMPtr<nsISVCBRecord> svcbRecord;
if (NS_FAILED(mHTTPSRecord->GetServiceModeRecordWithCname(
caps & NS_HTTP_DISALLOW_SPDY, caps & NS_HTTP_DISALLOW_HTTP3, cname,
getter_AddRefs(svcbRecord)))) {
return mTransaction->OnHTTPSRRAvailable(mHTTPSRecord, nullptr, cname);
}
return mTransaction->OnHTTPSRRAvailable(mHTTPSRecord, svcbRecord, cname);
}
void HTTPSRecordResolver::PrefetchAddrRecord(const nsACString& aTargetName,
bool aRefreshDNS) {
MOZ_ASSERT(mTransaction);
nsCOMPtr<nsIDNSService> dns = mozilla::components::DNS::Service();
if (!dns) {
return;
}
nsIDNSService::DNSFlags flags = nsIDNSService::GetFlagsFromTRRMode(
mTransaction->ConnectionInfo()->GetTRRMode());
if (aRefreshDNS) {
flags |= nsIDNSService::RESOLVE_BYPASS_CACHE;
}
nsCOMPtr<nsICancelable> tmpOutstanding;
(void)dns->AsyncResolveNative(
aTargetName, nsIDNSService::RESOLVE_TYPE_DEFAULT,
flags | nsIDNSService::RESOLVE_SPECULATE, nullptr, this,
GetCurrentSerialEventTarget(),
mTransaction->ConnectionInfo()->GetOriginAttributes(),
getter_AddRefs(tmpOutstanding));
}
void HTTPSRecordResolver::Close() {
mTransaction = nullptr;
MutexAutoLock lock(mMutex);
if (mCnameRequest) {
mCnameRequest->Cancel(NS_ERROR_ABORT);
mCnameRequest = nullptr;
}
if (mHTTPSRecordRequest) {
mHTTPSRecordRequest->Cancel(NS_ERROR_ABORT);
mHTTPSRecordRequest = nullptr;
}
}
} // namespace net
} // namespace mozilla
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