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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /netwerk/protocol/http/AlternateServices.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'netwerk/protocol/http/AlternateServices.cpp')
-rw-r--r--netwerk/protocol/http/AlternateServices.cpp1322
1 files changed, 1322 insertions, 0 deletions
diff --git a/netwerk/protocol/http/AlternateServices.cpp b/netwerk/protocol/http/AlternateServices.cpp
new file mode 100644
index 0000000000..83996ce87c
--- /dev/null
+++ b/netwerk/protocol/http/AlternateServices.cpp
@@ -0,0 +1,1322 @@
+/* -*- Mode: C++; tab-width: 8; 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/. */
+
+#include "HttpLog.h"
+
+#include "AlternateServices.h"
+#include "LoadInfo.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/StaticPrefs_network.h"
+#include "mozilla/SyncRunnable.h"
+#include "mozilla/dom/PContent.h"
+#include "mozilla/net/AltSvcTransactionChild.h"
+#include "mozilla/net/AltSvcTransactionParent.h"
+#include "nsComponentManagerUtils.h"
+#include "nsEscape.h"
+#include "nsHttpChannel.h"
+#include "nsHttpConnectionInfo.h"
+#include "nsHttpHandler.h"
+#include "nsHttpTransaction.h"
+#include "nsIOService.h"
+#include "nsITLSSocketControl.h"
+#include "nsIWellKnownOpportunisticUtils.h"
+#include "nsThreadUtils.h"
+
+/* RFC 7838 Alternative Services
+ http://httpwg.org/http-extensions/opsec.html
+ note that connections currently do not do mixed-scheme (the I attribute
+ in the ConnectionInfo prevents it) but could, do not honor tls-commit and
+ should not, and always require authentication
+*/
+
+namespace mozilla {
+namespace net {
+
+// function places true in outIsHTTPS if scheme is https, false if
+// http, and returns an error if neither. originScheme passed into
+// alternate service should already be normalized to those lower case
+// strings by the URI parser (and so there is an assert)- this is an extra
+// check.
+static nsresult SchemeIsHTTPS(const nsACString& originScheme,
+ bool& outIsHTTPS) {
+ outIsHTTPS = originScheme.EqualsLiteral("https");
+
+ if (!outIsHTTPS && !originScheme.EqualsLiteral("http")) {
+ MOZ_ASSERT(!originScheme.LowerCaseEqualsLiteral("https") &&
+ !originScheme.LowerCaseEqualsLiteral("http"),
+ "The scheme should already be lowercase");
+ return NS_ERROR_UNEXPECTED;
+ }
+ return NS_OK;
+}
+
+bool AltSvcMapping::AcceptableProxy(nsProxyInfo* proxyInfo) {
+ return !proxyInfo || proxyInfo->IsDirect() || proxyInfo->IsSOCKS();
+}
+
+void AltSvcMapping::ProcessHeader(
+ const nsCString& buf, const nsCString& originScheme,
+ const nsCString& originHost, int32_t originPort, const nsACString& username,
+ bool privateBrowsing, nsIInterfaceRequestor* callbacks,
+ nsProxyInfo* proxyInfo, uint32_t caps,
+ const OriginAttributes& originAttributes,
+ bool aDontValidate /* = false */) { // aDontValidate is only used for
+ // testing
+ MOZ_ASSERT(NS_IsMainThread());
+ LOG(("AltSvcMapping::ProcessHeader: %s\n", buf.get()));
+
+ if (StaticPrefs::network_http_altsvc_proxy_checks() &&
+ !AcceptableProxy(proxyInfo)) {
+ LOG(("AltSvcMapping::ProcessHeader ignoring due to proxy\n"));
+ return;
+ }
+
+ bool isHTTPS;
+ if (NS_FAILED(SchemeIsHTTPS(originScheme, isHTTPS))) {
+ return;
+ }
+ if (!isHTTPS && !gHttpHandler->AllowAltSvcOE()) {
+ LOG(("Alt-Svc Response Header for http:// origin but OE disabled\n"));
+ return;
+ }
+
+ LOG(("Alt-Svc Response Header %s\n", buf.get()));
+ ParsedHeaderValueListList parsedAltSvc(buf);
+ int32_t numEntriesInHeader = parsedAltSvc.mValues.Length();
+
+ // Only use one http3 version.
+ bool http3Found = false;
+
+ for (uint32_t index = 0; index < parsedAltSvc.mValues.Length(); ++index) {
+ uint32_t maxage = 86400; // default
+ nsAutoCString hostname;
+ nsAutoCString npnToken;
+ int32_t portno = originPort;
+ bool clearEntry = false;
+ bool isHttp3 = false;
+
+ for (uint32_t pairIndex = 0;
+ pairIndex < parsedAltSvc.mValues[index].mValues.Length();
+ ++pairIndex) {
+ nsDependentCSubstring& currentName =
+ parsedAltSvc.mValues[index].mValues[pairIndex].mName;
+ nsDependentCSubstring& currentValue =
+ parsedAltSvc.mValues[index].mValues[pairIndex].mValue;
+
+ if (!pairIndex) {
+ if (currentName.EqualsLiteral("clear")) {
+ clearEntry = true;
+ --numEntriesInHeader; // Only want to keep track of actual alt-svc
+ // maps, not clearing
+ break;
+ }
+
+ // h2=[hostname]:443 or h3-xx=[hostname]:port
+ // XX is current version we support and it is define in nsHttp.h.
+ isHttp3 = gHttpHandler->IsHttp3VersionSupported(currentName);
+ npnToken = currentName;
+
+ int32_t colonIndex = currentValue.FindChar(':');
+ if (colonIndex >= 0) {
+ portno =
+ atoi(PromiseFlatCString(currentValue).get() + colonIndex + 1);
+ } else {
+ colonIndex = 0;
+ }
+ hostname.Assign(currentValue.BeginReading(), colonIndex);
+ } else if (currentName.EqualsLiteral("ma")) {
+ maxage = atoi(PromiseFlatCString(currentValue).get());
+ } else {
+ LOG(("Alt Svc ignoring parameter %s", currentName.BeginReading()));
+ }
+ }
+
+ if (clearEntry) {
+ nsCString suffix;
+ originAttributes.CreateSuffix(suffix);
+ LOG(("Alt Svc clearing mapping for %s:%d:%s", originHost.get(),
+ originPort, suffix.get()));
+ gHttpHandler->AltServiceCache()->ClearHostMapping(originHost, originPort,
+ originAttributes);
+ continue;
+ }
+
+ if (NS_FAILED(NS_CheckPortSafety(portno, originScheme.get()))) {
+ LOG(("Alt Svc doesn't allow port %d, ignoring", portno));
+ continue;
+ }
+
+ // unescape modifies a c string in place, so afterwards
+ // update nsCString length
+ nsUnescape(npnToken.BeginWriting());
+ npnToken.SetLength(strlen(npnToken.BeginReading()));
+
+ if (http3Found && isHttp3) {
+ LOG(("Alt Svc ignore multiple Http3 options (%s)", npnToken.get()));
+ continue;
+ }
+
+ SpdyInformation* spdyInfo = gHttpHandler->SpdyInfo();
+ if (!(npnToken.Equals(spdyInfo->VersionString) &&
+ StaticPrefs::network_http_http2_enabled()) &&
+ !(isHttp3 && nsHttpHandler::IsHttp3Enabled() &&
+ !gHttpHandler->IsHttp3Excluded(hostname.IsEmpty() ? originHost
+ : hostname))) {
+ LOG(("Alt Svc unknown protocol %s, ignoring", npnToken.get()));
+ continue;
+ }
+
+ if (isHttp3) {
+ http3Found = true;
+ }
+
+ RefPtr<AltSvcMapping> mapping =
+ new AltSvcMapping(gHttpHandler->AltServiceCache()->GetStoragePtr(),
+ gHttpHandler->AltServiceCache()->StorageEpoch(),
+ originScheme, originHost, originPort, username,
+ privateBrowsing, NowInSeconds() + maxage, hostname,
+ portno, npnToken, originAttributes, isHttp3);
+ if (mapping->TTL() <= 0) {
+ LOG(("Alt Svc invalid map"));
+ mapping = nullptr;
+ // since this isn't a parse error, let's clear any existing mapping
+ // as that would have happened if we had accepted the parameters.
+ gHttpHandler->AltServiceCache()->ClearHostMapping(originHost, originPort,
+ originAttributes);
+ } else if (!aDontValidate) {
+ gHttpHandler->UpdateAltServiceMapping(mapping, proxyInfo, callbacks, caps,
+ originAttributes);
+ } else {
+ gHttpHandler->UpdateAltServiceMappingWithoutValidation(
+ mapping, proxyInfo, callbacks, caps, originAttributes);
+ }
+ }
+
+ if (numEntriesInHeader) { // Ignore headers that were just "alt-svc: clear"
+ Telemetry::Accumulate(Telemetry::HTTP_ALTSVC_ENTRIES_PER_HEADER,
+ numEntriesInHeader);
+ }
+}
+
+AltSvcMapping::AltSvcMapping(DataStorage* storage, int32_t epoch,
+ const nsACString& originScheme,
+ const nsACString& originHost, int32_t originPort,
+ const nsACString& username, bool privateBrowsing,
+ uint32_t expiresAt,
+ const nsACString& alternateHost,
+ int32_t alternatePort, const nsACString& npnToken,
+ const OriginAttributes& originAttributes,
+ bool aIsHttp3)
+ : mStorage(storage),
+ mStorageEpoch(epoch),
+ mAlternateHost(alternateHost),
+ mAlternatePort(alternatePort),
+ mOriginHost(originHost),
+ mOriginPort(originPort),
+ mUsername(username),
+ mPrivate(privateBrowsing),
+ mExpiresAt(expiresAt),
+ mNPNToken(npnToken),
+ mOriginAttributes(originAttributes),
+ mIsHttp3(aIsHttp3) {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (NS_FAILED(SchemeIsHTTPS(originScheme, mHttps))) {
+ LOG(("AltSvcMapping ctor %p invalid scheme\n", this));
+ mExpiresAt = 0; // invalid
+ }
+
+ if (mAlternatePort == -1) {
+ mAlternatePort = mHttps ? NS_HTTPS_DEFAULT_PORT : NS_HTTP_DEFAULT_PORT;
+ }
+ if (mOriginPort == -1) {
+ mOriginPort = mHttps ? NS_HTTPS_DEFAULT_PORT : NS_HTTP_DEFAULT_PORT;
+ }
+
+ LOG(("AltSvcMapping ctor %p %s://%s:%d to %s:%d\n", this,
+ nsCString(originScheme).get(), mOriginHost.get(), mOriginPort,
+ mAlternateHost.get(), mAlternatePort));
+
+ if (mAlternateHost.IsEmpty()) {
+ mAlternateHost = mOriginHost;
+ }
+
+ if ((mAlternatePort == mOriginPort) &&
+ mAlternateHost.EqualsIgnoreCase(mOriginHost.get()) && !mIsHttp3) {
+ // Http2 on the same host:port does not make sense because we are
+ // connecting to the same end point over the same protocol (TCP) as with
+ // original host. On the other hand, for Http3 alt-svc can be hosted on
+ // the same host:port because protocol(UDP vs. TCP) is always different and
+ // we are not connecting to the same end point.
+ LOG(("Alt Svc is also origin Svc - ignoring\n"));
+ mExpiresAt = 0; // invalid
+ }
+
+ if (mExpiresAt) {
+ MakeHashKey(mHashKey, originScheme, mOriginHost, mOriginPort, mPrivate,
+ mOriginAttributes, mIsHttp3);
+ }
+}
+
+void AltSvcMapping::MakeHashKey(nsCString& outKey,
+ const nsACString& originScheme,
+ const nsACString& originHost,
+ int32_t originPort, bool privateBrowsing,
+ const OriginAttributes& originAttributes,
+ bool aHttp3) {
+ outKey.Truncate();
+
+ if (originPort == -1) {
+ bool isHttps = originScheme.EqualsLiteral("https");
+ originPort = isHttps ? NS_HTTPS_DEFAULT_PORT : NS_HTTP_DEFAULT_PORT;
+ }
+
+ outKey.Append(originScheme);
+ outKey.Append(':');
+ outKey.Append(originHost);
+ outKey.Append(':');
+ outKey.AppendInt(originPort);
+ outKey.Append(':');
+ outKey.Append(privateBrowsing ? 'P' : '.');
+ outKey.Append(':');
+ nsAutoCString suffix;
+ originAttributes.CreateSuffix(suffix);
+ outKey.Append(suffix);
+ outKey.Append(':');
+
+ outKey.Append(aHttp3 ? '3' : '.');
+}
+
+int32_t AltSvcMapping::TTL() { return mExpiresAt - NowInSeconds(); }
+
+void AltSvcMapping::SyncString(const nsCString& str) {
+ MOZ_ASSERT(NS_IsMainThread());
+ mStorage->Put(HashKey(), str,
+ mPrivate ? DataStorage_Private : DataStorage_Persistent);
+}
+
+void AltSvcMapping::Sync() {
+ if (!mStorage) {
+ return;
+ }
+ if (mSyncOnlyOnSuccess && !mValidated) {
+ return;
+ }
+ nsCString value;
+ Serialize(value);
+
+ if (!NS_IsMainThread()) {
+ nsCOMPtr<nsIRunnable> r;
+ r = NewRunnableMethod<nsCString>("net::AltSvcMapping::SyncString", this,
+ &AltSvcMapping::SyncString, value);
+ NS_DispatchToMainThread(r, NS_DISPATCH_NORMAL);
+ return;
+ }
+
+ mStorage->Put(HashKey(), value,
+ mPrivate ? DataStorage_Private : DataStorage_Persistent);
+}
+
+void AltSvcMapping::SetValidated(bool val) {
+ mValidated = val;
+ Sync();
+}
+
+void AltSvcMapping::SetMixedScheme(bool val) {
+ mMixedScheme = val;
+ Sync();
+}
+
+void AltSvcMapping::SetExpiresAt(int32_t val) {
+ mExpiresAt = val;
+ Sync();
+}
+
+void AltSvcMapping::SetExpired() {
+ LOG(("AltSvcMapping SetExpired %p origin %s alternate %s\n", this,
+ mOriginHost.get(), mAlternateHost.get()));
+ mExpiresAt = NowInSeconds() - 1;
+ Sync();
+}
+
+bool AltSvcMapping::RouteEquals(AltSvcMapping* map) {
+ MOZ_ASSERT(map->mHashKey.Equals(mHashKey));
+ return mAlternateHost.Equals(map->mAlternateHost) &&
+ (mAlternatePort == map->mAlternatePort) &&
+ mNPNToken.Equals(map->mNPNToken);
+}
+
+void AltSvcMapping::GetConnectionInfo(
+ nsHttpConnectionInfo** outCI, nsProxyInfo* pi,
+ const OriginAttributes& originAttributes) {
+ RefPtr<nsHttpConnectionInfo> ci = new nsHttpConnectionInfo(
+ mOriginHost, mOriginPort, mNPNToken, mUsername, pi, originAttributes,
+ mAlternateHost, mAlternatePort, mIsHttp3, false);
+
+ // http:// without the mixed-scheme attribute needs to be segmented in the
+ // connection manager connection information hash with this attribute
+ if (!mHttps && !mMixedScheme) {
+ ci->SetInsecureScheme(true);
+ }
+ ci->SetPrivate(mPrivate);
+ ci.forget(outCI);
+}
+
+void AltSvcMapping::Serialize(nsCString& out) {
+ // Be careful, when serializing new members, add them to the end of this list.
+ out = mHttps ? "https:"_ns : "http:"_ns;
+ out.Append(mOriginHost);
+ out.Append(':');
+ out.AppendInt(mOriginPort);
+ out.Append(':');
+ out.Append(mAlternateHost);
+ out.Append(':');
+ out.AppendInt(mAlternatePort);
+ out.Append(':');
+ out.Append(mUsername);
+ out.Append(':');
+ out.Append(mPrivate ? 'y' : 'n');
+ out.Append(':');
+ out.AppendInt(mExpiresAt);
+ out.Append(':');
+ out.Append(mNPNToken);
+ out.Append(':');
+ out.Append(mValidated ? 'y' : 'n');
+ out.Append(':');
+ out.AppendInt(mStorageEpoch);
+ out.Append(':');
+ out.Append(mMixedScheme ? 'y' : 'n');
+ out.Append(':');
+ nsAutoCString suffix;
+ mOriginAttributes.CreateSuffix(suffix);
+ out.Append(suffix);
+ out.Append(':');
+ out.Append(""_ns); // Formerly topWindowOrigin. Now unused empty string.
+ out.Append('|'); // Be careful, the top window origin may contain colons!
+ out.Append('n'); // Formerly mIsolated. Now always 'n'. Should remove someday
+ out.Append(':');
+ out.Append(mIsHttp3 ? 'y' : 'n');
+ out.Append(':');
+ // Add code to serialize new members here!
+}
+
+AltSvcMapping::AltSvcMapping(DataStorage* storage, int32_t epoch,
+ const nsCString& str)
+ : mStorage(storage), mStorageEpoch(epoch) {
+ mValidated = false;
+ nsresult code;
+ char separator = ':';
+
+ // The the do {} while(0) loop acts like try/catch(e){} with the break in
+ // _NS_NEXT_TOKEN
+ do {
+#ifdef _NS_NEXT_TOKEN
+ COMPILER ERROR
+#endif
+#define _NS_NEXT_TOKEN \
+ start = idx + 1; \
+ idx = str.FindChar(separator, start); \
+ if (idx < 0) break;
+ int32_t start = 0;
+ int32_t idx;
+ idx = str.FindChar(separator, start);
+ if (idx < 0) break;
+ // Be careful, when deserializing new members, add them to the end of this
+ // list.
+ mHttps = Substring(str, start, idx - start).EqualsLiteral("https");
+ _NS_NEXT_TOKEN;
+ mOriginHost = Substring(str, start, idx - start);
+ _NS_NEXT_TOKEN;
+ mOriginPort =
+ nsCString(Substring(str, start, idx - start)).ToInteger(&code);
+ _NS_NEXT_TOKEN;
+ mAlternateHost = Substring(str, start, idx - start);
+ _NS_NEXT_TOKEN;
+ mAlternatePort =
+ nsCString(Substring(str, start, idx - start)).ToInteger(&code);
+ _NS_NEXT_TOKEN;
+ mUsername = Substring(str, start, idx - start);
+ _NS_NEXT_TOKEN;
+ mPrivate = Substring(str, start, idx - start).EqualsLiteral("y");
+ _NS_NEXT_TOKEN;
+ mExpiresAt = nsCString(Substring(str, start, idx - start)).ToInteger(&code);
+ _NS_NEXT_TOKEN;
+ mNPNToken = Substring(str, start, idx - start);
+ _NS_NEXT_TOKEN;
+ mValidated = Substring(str, start, idx - start).EqualsLiteral("y");
+ _NS_NEXT_TOKEN;
+ mStorageEpoch =
+ nsCString(Substring(str, start, idx - start)).ToInteger(&code);
+ _NS_NEXT_TOKEN;
+ mMixedScheme = Substring(str, start, idx - start).EqualsLiteral("y");
+ _NS_NEXT_TOKEN;
+ Unused << mOriginAttributes.PopulateFromSuffix(
+ Substring(str, start, idx - start));
+ // The separator after the top window origin is a pipe character since the
+ // origin string can contain colons.
+ separator = '|';
+ _NS_NEXT_TOKEN;
+ // TopWindowOrigin used to be encoded here. Now it's unused.
+ separator = ':';
+ _NS_NEXT_TOKEN;
+ // mIsolated used to be encoded here. Now it's unused.
+ _NS_NEXT_TOKEN;
+ mIsHttp3 = Substring(str, start, idx - start).EqualsLiteral("y");
+ // Add code to deserialize new members here!
+#undef _NS_NEXT_TOKEN
+
+ MakeHashKey(mHashKey, mHttps ? "https"_ns : "http"_ns, mOriginHost,
+ mOriginPort, mPrivate, mOriginAttributes, mIsHttp3);
+ } while (false);
+}
+
+AltSvcMappingValidator::AltSvcMappingValidator(AltSvcMapping* aMap)
+ : mMapping(aMap) {
+ LOG(("AltSvcMappingValidator ctor %p map %p [%s -> %s]", this, aMap,
+ aMap->OriginHost().get(), aMap->AlternateHost().get()));
+ MOZ_ASSERT(mMapping);
+ MOZ_ASSERT(mMapping->HTTPS()); // http:// uses the .wk path
+}
+
+void AltSvcMappingValidator::OnTransactionDestroy(bool aValidateResult) {
+ mMapping->SetValidated(aValidateResult);
+ if (!mMapping->Validated()) {
+ // try again later
+ mMapping->SetExpiresAt(NowInSeconds() + 2);
+ }
+ LOG(
+ ("AltSvcMappingValidator::OnTransactionDestroy %p map %p validated %d "
+ "[%s]",
+ this, mMapping.get(), mMapping->Validated(), mMapping->HashKey().get()));
+}
+
+void AltSvcMappingValidator::OnTransactionClose(bool aValidateResult) {
+ mMapping->SetValidated(aValidateResult);
+ LOG(
+ ("AltSvcMappingValidator::OnTransactionClose %p map %p validated %d "
+ "[%s]",
+ this, mMapping.get(), mMapping->Validated(), mMapping->HashKey().get()));
+}
+
+template <class Validator>
+AltSvcTransaction<Validator>::AltSvcTransaction(
+ nsHttpConnectionInfo* ci, nsIInterfaceRequestor* callbacks, uint32_t caps,
+ Validator* aValidator, bool aIsHttp3)
+ : SpeculativeTransaction(ci, callbacks, caps),
+ mValidator(aValidator),
+ mIsHttp3(aIsHttp3),
+ mRunning(true),
+ mTriedToValidate(false),
+ mTriedToWrite(false),
+ mValidatedResult(false) {
+ MOZ_ASSERT_IF(nsIOService::UseSocketProcess(), XRE_IsSocketProcess());
+ MOZ_ASSERT_IF(!nsIOService::UseSocketProcess(), XRE_IsParentProcess());
+ // We don't want to let this transaction use consistent connection.
+ mCaps &= ~NS_HTTP_ALLOW_KEEPALIVE;
+}
+
+template <class Validator>
+AltSvcTransaction<Validator>::~AltSvcTransaction() {
+ LOG(("AltSvcTransaction dtor %p running %d", this, mRunning));
+
+ if (mRunning) {
+ mValidatedResult = MaybeValidate(NS_OK);
+ mValidator->OnTransactionDestroy(mValidatedResult);
+ }
+}
+
+template <class Validator>
+bool AltSvcTransaction<Validator>::MaybeValidate(nsresult reason) {
+ if (mTriedToValidate) {
+ return mValidatedResult;
+ }
+ mTriedToValidate = true;
+
+ LOG(("AltSvcTransaction::MaybeValidate() %p reason=%" PRIx32
+ " running=%d conn=%p write=%d",
+ this, static_cast<uint32_t>(reason), mRunning, mConnection.get(),
+ mTriedToWrite));
+
+ if (mTriedToWrite && reason == NS_BASE_STREAM_CLOSED) {
+ // The normal course of events is to cause the transaction to fail with
+ // CLOSED on a write - so that's a success that means the HTTP/2 session
+ // is setup.
+ reason = NS_OK;
+ }
+
+ if (NS_FAILED(reason) || !mRunning || !mConnection) {
+ LOG(("AltSvcTransaction::MaybeValidate %p Failed due to precondition",
+ this));
+ return false;
+ }
+
+ // insist on >= http/2
+ HttpVersion version = mConnection->Version();
+ LOG(("AltSvcTransaction::MaybeValidate() %p version %d\n", this,
+ static_cast<int32_t>(version)));
+ if ((!mIsHttp3 && (version != HttpVersion::v2_0)) ||
+ (mIsHttp3 && (version != HttpVersion::v3_0))) {
+ LOG(
+ ("AltSvcTransaction::MaybeValidate %p Failed due to protocol version"
+ " expacted %s.",
+ this, mIsHttp3 ? "Http3" : "Http2"));
+ return false;
+ }
+
+ nsCOMPtr<nsITLSSocketControl> socketControl;
+ mConnection->GetTLSSocketControl(getter_AddRefs(socketControl));
+
+ LOG(("AltSvcTransaction::MaybeValidate() %p socketControl=%p\n", this,
+ socketControl.get()));
+
+ if (socketControl->GetFailedVerification()) {
+ LOG(
+ ("AltSvcTransaction::MaybeValidate() %p "
+ "not validated due to auth error",
+ this));
+ return false;
+ }
+
+ LOG(
+ ("AltSvcTransaction::MaybeValidate() %p "
+ "validating alternate service with successful auth check",
+ this));
+
+ return true;
+}
+
+template <class Validator>
+void AltSvcTransaction<Validator>::Close(nsresult reason) {
+ LOG(("AltSvcTransaction::Close() %p reason=%" PRIx32 " running %d", this,
+ static_cast<uint32_t>(reason), mRunning));
+
+ mValidatedResult = MaybeValidate(reason);
+ mValidator->OnTransactionClose(mValidatedResult);
+ if (!mValidatedResult && mConnection) {
+ mConnection->DontReuse();
+ }
+ NullHttpTransaction::Close(reason);
+}
+
+template <class Validator>
+nsresult AltSvcTransaction<Validator>::ReadSegments(
+ nsAHttpSegmentReader* reader, uint32_t count, uint32_t* countRead) {
+ LOG(("AltSvcTransaction::ReadSegements() %p\n", this));
+ mTriedToWrite = true;
+ return NullHttpTransaction::ReadSegments(reader, count, countRead);
+}
+
+class WellKnownChecker {
+ public:
+ WellKnownChecker(nsIURI* uri, const nsCString& origin, uint32_t caps,
+ nsHttpConnectionInfo* ci, AltSvcMapping* mapping)
+ : mWaiting(
+ 2) // waiting for 2 channels (default and alternate) to complete
+ ,
+ mOrigin(origin),
+ mAlternatePort(ci->RoutedPort()),
+ mMapping(mapping),
+ mCI(ci),
+ mURI(uri),
+ mCaps(caps) {
+ LOG(("WellKnownChecker ctor %p\n", this));
+ MOZ_ASSERT(!mMapping->HTTPS());
+ }
+
+ nsresult Start() {
+ LOG(("WellKnownChecker::Start %p\n", this));
+ nsCOMPtr<nsILoadInfo> loadInfo =
+ new LoadInfo(nsContentUtils::GetSystemPrincipal(), nullptr, nullptr,
+ nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
+ nsIContentPolicy::TYPE_OTHER);
+ loadInfo->SetOriginAttributes(mCI->GetOriginAttributes());
+ // allow deprecated HTTP request from SystemPrincipal
+ loadInfo->SetAllowDeprecatedSystemRequests(true);
+
+ RefPtr<nsHttpChannel> chan = new nsHttpChannel();
+ nsresult rv;
+
+ mTransactionAlternate = new TransactionObserver(chan, this);
+ RefPtr<nsHttpConnectionInfo> newCI = mCI->Clone();
+ rv = MakeChannel(chan, mTransactionAlternate, newCI, mURI, mCaps, loadInfo);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ chan = new nsHttpChannel();
+ mTransactionOrigin = new TransactionObserver(chan, this);
+ newCI = nullptr;
+ return MakeChannel(chan, mTransactionOrigin, newCI, mURI, mCaps, loadInfo);
+ }
+
+ void Done(TransactionObserver* finished) {
+ MOZ_ASSERT(NS_IsMainThread());
+ LOG(("WellKnownChecker::Done %p waiting for %d\n", this, mWaiting));
+
+ mWaiting--; // another channel is complete
+ if (!mWaiting) { // there are all complete!
+ nsAutoCString mAlternateCT, mOriginCT;
+ mTransactionOrigin->mChannel->GetContentType(mOriginCT);
+ mTransactionAlternate->mChannel->GetContentType(mAlternateCT);
+ nsCOMPtr<nsIWellKnownOpportunisticUtils> uu =
+ do_CreateInstance(NS_WELLKNOWNOPPORTUNISTICUTILS_CONTRACTID);
+ bool accepted = false;
+
+ if (!mTransactionOrigin->mStatusOK) {
+ LOG(("WellKnownChecker::Done %p origin was not 200 response code\n",
+ this));
+ } else if (!mTransactionAlternate->mAuthOK) {
+ LOG(("WellKnownChecker::Done %p alternate was not TLS authenticated\n",
+ this));
+ } else if (!mTransactionAlternate->mStatusOK) {
+ LOG(("WellKnownChecker::Done %p alternate was not 200 response code\n",
+ this));
+ } else if (!mTransactionAlternate->mVersionOK) {
+ LOG(("WellKnownChecker::Done %p alternate was not at least h2 or h3\n",
+ this));
+ } else if (!mTransactionAlternate->mWKResponse.Equals(
+ mTransactionOrigin->mWKResponse)) {
+ LOG(
+ ("WellKnownChecker::Done %p alternate and origin "
+ ".wk representations don't match\norigin: %s\alternate:%s\n",
+ this, mTransactionOrigin->mWKResponse.get(),
+ mTransactionAlternate->mWKResponse.get()));
+ } else if (!mAlternateCT.Equals(mOriginCT)) {
+ LOG(
+ ("WellKnownChecker::Done %p alternate and origin content types "
+ "dont match\n",
+ this));
+ } else if (!mAlternateCT.EqualsLiteral("application/json")) {
+ LOG(("WellKnownChecker::Done %p .wk content type is %s\n", this,
+ mAlternateCT.get()));
+ } else if (!uu) {
+ LOG(("WellKnownChecker::Done %p json parser service unavailable\n",
+ this));
+ } else {
+ accepted = true;
+ }
+
+ if (accepted) {
+ MOZ_ASSERT(!mMapping->HTTPS()); // https:// does not use .wk
+
+ nsresult rv = uu->Verify(mTransactionAlternate->mWKResponse, mOrigin);
+ if (NS_SUCCEEDED(rv)) {
+ bool validWK = false;
+ Unused << uu->GetValid(&validWK);
+ if (!validWK) {
+ LOG(("WellKnownChecker::Done %p json parser declares invalid\n%s\n",
+ this, mTransactionAlternate->mWKResponse.get()));
+ accepted = false;
+ }
+ } else {
+ LOG(("WellKnownChecker::Done %p .wk jason eval failed to run\n",
+ this));
+ accepted = false;
+ }
+ }
+
+ MOZ_ASSERT(!mMapping->Validated());
+ if (accepted) {
+ LOG(("WellKnownChecker::Done %p Alternate for %s ACCEPTED\n", this,
+ mOrigin.get()));
+ mMapping->SetValidated(true);
+ } else {
+ LOG(("WellKnownChecker::Done %p Alternate for %s FAILED\n", this,
+ mOrigin.get()));
+ // try again soon
+ mMapping->SetExpiresAt(NowInSeconds() + 2);
+ }
+
+ delete this;
+ }
+ }
+
+ ~WellKnownChecker() { LOG(("WellKnownChecker dtor %p\n", this)); }
+
+ private:
+ nsresult MakeChannel(nsHttpChannel* chan, TransactionObserver* obs,
+ nsHttpConnectionInfo* ci, nsIURI* uri, uint32_t caps,
+ nsILoadInfo* loadInfo) {
+ uint64_t channelId;
+ nsLoadFlags flags;
+
+ ExtContentPolicyType contentPolicyType =
+ loadInfo->GetExternalContentPolicyType();
+
+ if (NS_FAILED(gHttpHandler->NewChannelId(channelId)) ||
+ NS_FAILED(chan->Init(uri, caps, nullptr, 0, nullptr, channelId,
+ contentPolicyType, loadInfo)) ||
+ NS_FAILED(chan->SetAllowAltSvc(false)) ||
+ NS_FAILED(chan->SetRedirectMode(
+ nsIHttpChannelInternal::REDIRECT_MODE_ERROR)) ||
+ NS_FAILED(chan->GetLoadFlags(&flags))) {
+ return NS_ERROR_FAILURE;
+ }
+ flags |= HttpBaseChannel::LOAD_BYPASS_CACHE;
+ if (NS_FAILED(chan->SetLoadFlags(flags))) {
+ return NS_ERROR_FAILURE;
+ }
+ chan->SetTransactionObserver(obs);
+ chan->SetConnectionInfo(ci);
+ return chan->AsyncOpen(obs);
+ }
+
+ RefPtr<TransactionObserver> mTransactionAlternate;
+ RefPtr<TransactionObserver> mTransactionOrigin;
+ uint32_t mWaiting; // semaphore
+ nsCString mOrigin;
+ int32_t mAlternatePort;
+ RefPtr<AltSvcMapping> mMapping;
+ RefPtr<nsHttpConnectionInfo> mCI;
+ nsCOMPtr<nsIURI> mURI;
+ uint32_t mCaps;
+};
+
+NS_IMPL_ISUPPORTS(TransactionObserver, nsIStreamListener)
+
+TransactionObserver::TransactionObserver(nsHttpChannel* channel,
+ WellKnownChecker* checker)
+ : mChannel(channel),
+ mChecker(checker),
+ mRanOnce(false),
+ mStatusOK(false),
+ mAuthOK(false),
+ mVersionOK(false) {
+ LOG(("TransactionObserver ctor %p channel %p checker %p\n", this, channel,
+ checker));
+ mChannelRef = do_QueryInterface((nsIHttpChannel*)channel);
+}
+
+void TransactionObserver::Complete(bool versionOK, bool authOK,
+ nsresult reason) {
+ if (mRanOnce) {
+ return;
+ }
+ mRanOnce = true;
+
+ mVersionOK = versionOK;
+ mAuthOK = authOK;
+
+ LOG(
+ ("TransactionObserve::Complete %p authOK %d versionOK %d"
+ " reason %" PRIx32,
+ this, authOK, versionOK, static_cast<uint32_t>(reason)));
+}
+
+#define MAX_WK 32768
+
+NS_IMETHODIMP
+TransactionObserver::OnStartRequest(nsIRequest* aRequest) {
+ MOZ_ASSERT(NS_IsMainThread());
+ // only consider the first 32KB.. because really.
+ mWKResponse.SetCapacity(MAX_WK);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+TransactionObserver::OnDataAvailable(nsIRequest* aRequest,
+ nsIInputStream* aStream, uint64_t aOffset,
+ uint32_t aCount) {
+ MOZ_ASSERT(NS_IsMainThread());
+ uint32_t oldLen = mWKResponse.Length();
+ uint64_t newLen = aCount + oldLen;
+ if (newLen < MAX_WK) {
+ auto handleOrErr = mWKResponse.BulkWrite(newLen, oldLen, false);
+ if (handleOrErr.isErr()) {
+ return handleOrErr.unwrapErr();
+ }
+ auto handle = handleOrErr.unwrap();
+ uint32_t amtRead;
+ if (NS_SUCCEEDED(
+ aStream->Read(handle.Elements() + oldLen, aCount, &amtRead))) {
+ MOZ_ASSERT(oldLen + amtRead <= newLen);
+ handle.Finish(oldLen + amtRead, false);
+ LOG(("TransactionObserver onDataAvailable %p read %d of .wk [%zd]\n",
+ this, amtRead, mWKResponse.Length()));
+ } else {
+ LOG(("TransactionObserver onDataAvailable %p read error\n", this));
+ }
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+TransactionObserver::OnStopRequest(nsIRequest* aRequest, nsresult code) {
+ MOZ_ASSERT(NS_IsMainThread());
+ LOG(("TransactionObserver onStopRequest %p code %" PRIx32 "\n", this,
+ static_cast<uint32_t>(code)));
+ if (NS_SUCCEEDED(code)) {
+ nsHttpResponseHead* hdrs = mChannel->GetResponseHead();
+ LOG(("TransactionObserver onStopRequest %p http resp %d\n", this,
+ hdrs ? hdrs->Status() : -1));
+ mStatusOK = hdrs && (hdrs->Status() == 200);
+ }
+ if (mChecker) {
+ mChecker->Done(this);
+ }
+ return NS_OK;
+}
+
+void AltSvcCache::EnsureStorageInited() {
+ static Atomic<bool> initialized(false);
+
+ if (initialized) {
+ return;
+ }
+
+ auto initTask = [&]() {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ // DataStorage gives synchronous access to a memory based hash table
+ // that is backed by disk where those writes are done asynchronously
+ // on another thread
+ mStorage = DataStorage::Get(DataStorageClass::AlternateServices);
+ if (!mStorage) {
+ LOG(("AltSvcCache::EnsureStorageInited WARN NO STORAGE\n"));
+ return;
+ }
+
+ if (NS_FAILED(mStorage->Init())) {
+ mStorage = nullptr;
+ } else {
+ initialized = true;
+ }
+
+ mStorageEpoch = NowInSeconds();
+ };
+
+ if (NS_IsMainThread()) {
+ initTask();
+ return;
+ }
+
+ nsCOMPtr<nsIEventTarget> main = GetMainThreadSerialEventTarget();
+ if (!main) {
+ return;
+ }
+
+ SyncRunnable::DispatchToThread(
+ main,
+ NS_NewRunnableFunction("AltSvcCache::EnsureStorageInited", initTask));
+}
+
+already_AddRefed<AltSvcMapping> AltSvcCache::LookupMapping(
+ const nsCString& key, bool privateBrowsing) {
+ LOG(("AltSvcCache::LookupMapping %p %s\n", this, key.get()));
+ if (!mStorage) {
+ LOG(("AltSvcCache::LookupMapping %p no backing store\n", this));
+ return nullptr;
+ }
+
+ if (NS_IsMainThread() && !mStorage->IsReady()) {
+ LOG(("AltSvcCache::LookupMapping %p skip when storage is not ready\n",
+ this));
+ return nullptr;
+ }
+
+ nsCString val(mStorage->Get(
+ key, privateBrowsing ? DataStorage_Private : DataStorage_Persistent));
+ if (val.IsEmpty()) {
+ LOG(("AltSvcCache::LookupMapping %p MISS\n", this));
+ return nullptr;
+ }
+ RefPtr<AltSvcMapping> rv = new AltSvcMapping(mStorage, mStorageEpoch, val);
+ if (!rv->Validated() && (rv->StorageEpoch() != mStorageEpoch)) {
+ // this was an in progress validation abandoned in a different session
+ // rare edge case will not detect session change - that's ok as only impact
+ // will be loss of alt-svc to this origin for this session.
+ LOG(("AltSvcCache::LookupMapping %p invalid hit - MISS\n", this));
+ mStorage->Remove(
+ key, rv->Private() ? DataStorage_Private : DataStorage_Persistent);
+ return nullptr;
+ }
+
+ if (rv->IsHttp3() &&
+ (!nsHttpHandler::IsHttp3Enabled() ||
+ !gHttpHandler->IsHttp3VersionSupported(rv->NPNToken()) ||
+ gHttpHandler->IsHttp3Excluded(rv->AlternateHost()))) {
+ // If Http3 is disabled or the version not supported anymore, remove the
+ // mapping.
+ mStorage->Remove(
+ key, rv->Private() ? DataStorage_Private : DataStorage_Persistent);
+ return nullptr;
+ }
+
+ if (rv->TTL() <= 0) {
+ LOG(("AltSvcCache::LookupMapping %p expired hit - MISS\n", this));
+ mStorage->Remove(
+ key, rv->Private() ? DataStorage_Private : DataStorage_Persistent);
+ return nullptr;
+ }
+
+ MOZ_ASSERT(rv->Private() == privateBrowsing);
+ LOG(("AltSvcCache::LookupMapping %p HIT %p\n", this, rv.get()));
+ return rv.forget();
+}
+
+// This is only used for testing!
+void AltSvcCache::UpdateAltServiceMappingWithoutValidation(
+ AltSvcMapping* map, nsProxyInfo* pi, nsIInterfaceRequestor* aCallbacks,
+ uint32_t caps, const OriginAttributes& originAttributes) {
+ MOZ_ASSERT(NS_IsMainThread());
+ if (!mStorage) {
+ return;
+ }
+ RefPtr<AltSvcMapping> existing =
+ LookupMapping(map->HashKey(), map->Private());
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMappingWithoutValidation %p map %p "
+ "existing %p %s",
+ this, map, existing.get(), map->AlternateHost().get()));
+ if (!existing) {
+ map->SetValidated(true);
+ }
+}
+
+void AltSvcCache::UpdateAltServiceMapping(
+ AltSvcMapping* map, nsProxyInfo* pi, nsIInterfaceRequestor* aCallbacks,
+ uint32_t caps, const OriginAttributes& originAttributes) {
+ MOZ_ASSERT(NS_IsMainThread());
+ if (!mStorage) {
+ return;
+ }
+ RefPtr<AltSvcMapping> existing =
+ LookupMapping(map->HashKey(), map->Private());
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p map %p existing %p %s "
+ "validated=%d",
+ this, map, existing.get(), map->AlternateHost().get(),
+ existing ? existing->Validated() : 0));
+
+ if (existing && existing->Validated()) {
+ if (existing->RouteEquals(map)) {
+ // update expires in storage
+ // if this is http:// then a ttl can only be extended via .wk, so ignore
+ // this header path unless it is making things shorter
+ if (existing->HTTPS()) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p map %p updates ttl of "
+ "%p\n",
+ this, map, existing.get()));
+ existing->SetExpiresAt(map->GetExpiresAt());
+ } else {
+ if (map->GetExpiresAt() < existing->GetExpiresAt()) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p map %p reduces ttl of "
+ "%p\n",
+ this, map, existing.get()));
+ existing->SetExpiresAt(map->GetExpiresAt());
+ } else {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p map %p tries to extend "
+ "%p but"
+ " cannot as without .wk\n",
+ this, map, existing.get()));
+ }
+ }
+ Telemetry::Accumulate(Telemetry::HTTP_ALTSVC_MAPPING_CHANGED_TARGET,
+ false);
+ return;
+ }
+
+ if (map->GetExpiresAt() < existing->GetExpiresAt()) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p map %p ttl shorter than "
+ "%p, ignoring",
+ this, map, existing.get()));
+ return;
+ }
+
+ // new alternate. start new validation
+ LOG(("AltSvcCache::UpdateAltServiceMapping %p map %p may overwrite %p\n",
+ this, map, existing.get()));
+ Telemetry::Accumulate(Telemetry::HTTP_ALTSVC_MAPPING_CHANGED_TARGET, true);
+ }
+
+ if (existing && !existing->Validated()) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p map %p ignored because %p "
+ "still in progress\n",
+ this, map, existing.get()));
+ return;
+ }
+
+ if (map->IsHttp3()) {
+ bool isDirectOrNoProxy = pi ? pi->IsDirect() : true;
+ if (!isDirectOrNoProxy) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p map %p ignored h3 because "
+ "proxy is in use %p\n",
+ this, map, existing.get()));
+ return;
+ }
+ }
+
+ // start new validation, but don't overwrite a valid existing mapping unless
+ // this completes successfully
+ MOZ_ASSERT(!map->Validated());
+ if (!existing) {
+ map->Sync();
+ } else {
+ map->SetSyncOnlyOnSuccess(true);
+ }
+
+ RefPtr<nsHttpConnectionInfo> ci;
+ map->GetConnectionInfo(getter_AddRefs(ci), pi, originAttributes);
+ caps |= ci->GetAnonymous() ? NS_HTTP_LOAD_ANONYMOUS : 0;
+ caps |= NS_HTTP_ERROR_SOFTLY;
+
+ if (map->HTTPS()) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p validation via "
+ "speculative connect started\n",
+ this));
+ // for https resources we only establish a connection
+ nsCOMPtr<nsIInterfaceRequestor> callbacks = new AltSvcOverride(aCallbacks);
+ RefPtr<AltSvcMappingValidator> validator = new AltSvcMappingValidator(map);
+ RefPtr<SpeculativeTransaction> transaction;
+ if (nsIOService::UseSocketProcess()) {
+ RefPtr<AltSvcTransactionParent> parent =
+ new AltSvcTransactionParent(ci, aCallbacks, caps, validator);
+ if (!parent->Init()) {
+ return;
+ }
+ transaction = parent;
+ } else {
+ transaction = new AltSvcTransaction<AltSvcMappingValidator>(
+ ci, aCallbacks, caps, validator, map->IsHttp3());
+ }
+
+ nsresult rv =
+ gHttpHandler->SpeculativeConnect(ci, callbacks, caps, transaction);
+ if (NS_FAILED(rv)) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p "
+ "speculative connect failed with code %08x\n",
+ this, static_cast<uint32_t>(rv)));
+ }
+ } else {
+ // for http:// resources we fetch .well-known too
+ nsAutoCString origin("http://"_ns);
+
+ // Check whether origin is an ipv6 address. In that case we need to add
+ // '[]'.
+ if (map->OriginHost().FindChar(':') != kNotFound) {
+ origin.Append('[');
+ origin.Append(map->OriginHost());
+ origin.Append(']');
+ } else {
+ origin.Append(map->OriginHost());
+ }
+ if (map->OriginPort() != NS_HTTP_DEFAULT_PORT) {
+ origin.Append(':');
+ origin.AppendInt(map->OriginPort());
+ }
+
+ nsCOMPtr<nsIURI> wellKnown;
+ nsAutoCString uri(origin);
+ uri.AppendLiteral("/.well-known/http-opportunistic");
+ NS_NewURI(getter_AddRefs(wellKnown), uri);
+
+ auto* checker = new WellKnownChecker(wellKnown, origin, caps, ci, map);
+ if (NS_FAILED(checker->Start())) {
+ LOG(
+ ("AltSvcCache::UpdateAltServiceMapping %p .wk checker failed to "
+ "start\n",
+ this));
+ map->SetExpired();
+ delete checker;
+ checker = nullptr;
+ } else {
+ // object deletes itself when done if started
+ LOG(("AltSvcCache::UpdateAltServiceMapping %p .wk checker started %p\n",
+ this, checker));
+ }
+ }
+}
+
+already_AddRefed<AltSvcMapping> AltSvcCache::GetAltServiceMapping(
+ const nsACString& scheme, const nsACString& host, int32_t port,
+ bool privateBrowsing, const OriginAttributes& originAttributes,
+ bool aHttp2Allowed, bool aHttp3Allowed) {
+ EnsureStorageInited();
+
+ bool isHTTPS;
+ if (NS_FAILED(SchemeIsHTTPS(scheme, isHTTPS))) {
+ return nullptr;
+ }
+ if (!gHttpHandler->AllowAltSvc()) {
+ return nullptr;
+ }
+ if (!gHttpHandler->AllowAltSvcOE() && !isHTTPS) {
+ return nullptr;
+ }
+
+ // First look for HTTP3
+ if (aHttp3Allowed) {
+ nsAutoCString key;
+ AltSvcMapping::MakeHashKey(key, scheme, host, port, privateBrowsing,
+ originAttributes, true);
+ RefPtr<AltSvcMapping> existing = LookupMapping(key, privateBrowsing);
+ LOG(
+ ("AltSvcCache::GetAltServiceMapping %p key=%s "
+ "existing=%p validated=%d ttl=%d",
+ this, key.get(), existing.get(), existing ? existing->Validated() : 0,
+ existing ? existing->TTL() : 0));
+ if (existing && existing->Validated()) {
+ return existing.forget();
+ }
+ }
+
+ // Now look for HTTP2.
+ if (aHttp2Allowed) {
+ nsAutoCString key;
+ AltSvcMapping::MakeHashKey(key, scheme, host, port, privateBrowsing,
+ originAttributes, false);
+ RefPtr<AltSvcMapping> existing = LookupMapping(key, privateBrowsing);
+ LOG(
+ ("AltSvcCache::GetAltServiceMapping %p key=%s "
+ "existing=%p validated=%d ttl=%d",
+ this, key.get(), existing.get(), existing ? existing->Validated() : 0,
+ existing ? existing->TTL() : 0));
+ if (existing && existing->Validated()) {
+ return existing.forget();
+ }
+ }
+
+ return nullptr;
+}
+
+class ProxyClearHostMapping : public Runnable {
+ public:
+ explicit ProxyClearHostMapping(const nsACString& host, int32_t port,
+ const OriginAttributes& originAttributes)
+ : Runnable("net::ProxyClearHostMapping"),
+ mHost(host),
+ mPort(port),
+ mOriginAttributes(originAttributes) {}
+
+ NS_IMETHOD Run() override {
+ MOZ_ASSERT(NS_IsMainThread());
+ gHttpHandler->AltServiceCache()->ClearHostMapping(mHost, mPort,
+ mOriginAttributes);
+ return NS_OK;
+ }
+
+ private:
+ nsCString mHost;
+ int32_t mPort;
+ OriginAttributes mOriginAttributes;
+};
+
+void AltSvcCache::ClearHostMapping(const nsACString& host, int32_t port,
+ const OriginAttributes& originAttributes) {
+ MOZ_ASSERT(XRE_IsParentProcess());
+
+ if (!NS_IsMainThread()) {
+ nsCOMPtr<nsIRunnable> event =
+ new ProxyClearHostMapping(host, port, originAttributes);
+ if (event) {
+ NS_DispatchToMainThread(event);
+ }
+ return;
+ }
+ nsAutoCString key;
+ for (int secure = 0; secure < 2; ++secure) {
+ constexpr auto http = "http"_ns;
+ constexpr auto https = "https"_ns;
+ const nsLiteralCString& scheme = secure ? https : http;
+ for (int pb = 1; pb >= 0; --pb) {
+ AltSvcMapping::MakeHashKey(key, scheme, host, port, bool(pb),
+ originAttributes, false);
+ RefPtr<AltSvcMapping> existing = LookupMapping(key, bool(pb));
+ if (existing) {
+ existing->SetExpired();
+ }
+ AltSvcMapping::MakeHashKey(key, scheme, host, port, bool(pb),
+ originAttributes, true);
+ existing = LookupMapping(key, bool(pb));
+ if (existing) {
+ existing->SetExpired();
+ }
+ }
+ }
+}
+
+void AltSvcCache::ClearHostMapping(nsHttpConnectionInfo* ci) {
+ if (!ci->GetOrigin().IsEmpty()) {
+ ClearHostMapping(ci->GetOrigin(), ci->OriginPort(),
+ ci->GetOriginAttributes());
+ }
+}
+
+void AltSvcCache::ClearAltServiceMappings() {
+ MOZ_ASSERT(NS_IsMainThread());
+ if (mStorage) {
+ mStorage->Clear();
+ }
+}
+
+nsresult AltSvcCache::GetAltSvcCacheKeys(nsTArray<nsCString>& value) {
+ MOZ_ASSERT(NS_IsMainThread());
+ if (gHttpHandler->AllowAltSvc() && mStorage) {
+ nsTArray<DataStorageItem> items;
+ mStorage->GetAll(&items);
+
+ for (const auto& item : items) {
+ value.AppendElement(item.key);
+ }
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+AltSvcOverride::GetInterface(const nsIID& iid, void** result) {
+ if (NS_SUCCEEDED(QueryInterface(iid, result)) && *result) {
+ return NS_OK;
+ }
+
+ if (mCallbacks) {
+ return mCallbacks->GetInterface(iid, result);
+ }
+
+ return NS_ERROR_NO_INTERFACE;
+}
+
+NS_IMETHODIMP
+AltSvcOverride::GetIgnoreIdle(bool* ignoreIdle) {
+ *ignoreIdle = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+AltSvcOverride::GetParallelSpeculativeConnectLimit(
+ uint32_t* parallelSpeculativeConnectLimit) {
+ *parallelSpeculativeConnectLimit = 32;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+AltSvcOverride::GetIsFromPredictor(bool* isFromPredictor) {
+ *isFromPredictor = false;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+AltSvcOverride::GetAllow1918(bool* allow) {
+ // normally we don't do speculative connects to 1918.. and we use
+ // speculative connects for the mapping validation, so override
+ // that default here for alt-svc
+ *allow = true;
+ return NS_OK;
+}
+
+template class AltSvcTransaction<AltSvcTransactionChild>;
+
+NS_IMPL_ISUPPORTS(AltSvcOverride, nsIInterfaceRequestor,
+ nsISpeculativeConnectionOverrider)
+
+} // namespace net
+} // namespace mozilla