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-rw-r--r--netwerk/base/Tickler.cpp249
1 files changed, 249 insertions, 0 deletions
diff --git a/netwerk/base/Tickler.cpp b/netwerk/base/Tickler.cpp
new file mode 100644
index 0000000000..3030b24653
--- /dev/null
+++ b/netwerk/base/Tickler.cpp
@@ -0,0 +1,249 @@
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#include "Tickler.h"
+
+#ifdef MOZ_USE_WIFI_TICKLER
+# include "nsComponentManagerUtils.h"
+# include "nsINamed.h"
+# include "nsServiceManagerUtils.h"
+# include "nsThreadUtils.h"
+# include "prnetdb.h"
+
+# include "mozilla/java/GeckoAppShellWrappers.h"
+# include "mozilla/jni/Utils.h"
+
+namespace mozilla {
+namespace net {
+
+NS_IMPL_ISUPPORTS(Tickler, nsISupportsWeakReference, Tickler)
+
+Tickler::Tickler()
+ : mLock("Tickler::mLock"),
+ mActive(false),
+ mCanceled(false),
+ mEnabled(false),
+ mDelay(16),
+ mDuration(TimeDuration::FromMilliseconds(400)),
+ mFD(nullptr) {
+ MOZ_ASSERT(NS_IsMainThread());
+}
+
+Tickler::~Tickler() {
+ // non main thread uses of the tickler should hold weak
+ // references to it if they must hold a reference at all
+ MOZ_ASSERT(NS_IsMainThread());
+
+ if (mThread) {
+ mThread->AsyncShutdown();
+ mThread = nullptr;
+ }
+
+ if (mTimer) mTimer->Cancel();
+ if (mFD) PR_Close(mFD);
+}
+
+nsresult Tickler::Init() {
+ if (!XRE_IsParentProcess()) {
+ return NS_ERROR_FAILURE;
+ }
+
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_ASSERT(!mTimer);
+ MOZ_ASSERT(!mActive);
+ MOZ_ASSERT(!mThread);
+ MOZ_ASSERT(!mFD);
+
+ if (jni::IsAvailable()) {
+ java::GeckoAppShell::EnableNetworkNotifications();
+ }
+
+ mFD = PR_OpenUDPSocket(PR_AF_INET);
+ if (!mFD) return NS_ERROR_FAILURE;
+
+ // make sure new socket has a ttl of 1
+ // failure is not fatal.
+ PRSocketOptionData opt;
+ opt.option = PR_SockOpt_IpTimeToLive;
+ opt.value.ip_ttl = 1;
+ PR_SetSocketOption(mFD, &opt);
+
+ nsresult rv = NS_NewNamedThread("wifi tickler", getter_AddRefs(mThread));
+ if (NS_FAILED(rv)) return rv;
+
+ nsCOMPtr<nsITimer> tmpTimer = NS_NewTimer(mThread);
+ if (!tmpTimer) return NS_ERROR_OUT_OF_MEMORY;
+
+ mTimer.swap(tmpTimer);
+
+ mAddr.inet.family = PR_AF_INET;
+ mAddr.inet.port = PR_htons(4886);
+ mAddr.inet.ip = 0;
+
+ return NS_OK;
+}
+
+void Tickler::Tickle() {
+ MutexAutoLock lock(mLock);
+ MOZ_ASSERT(mThread);
+ mLastTickle = TimeStamp::Now();
+ if (!mActive) MaybeStartTickler();
+}
+
+void Tickler::PostCheckTickler() {
+ mLock.AssertCurrentThreadOwns();
+ mThread->Dispatch(NewRunnableMethod("net::Tickler::CheckTickler", this,
+ &Tickler::CheckTickler),
+ NS_DISPATCH_NORMAL);
+ return;
+}
+
+void Tickler::MaybeStartTicklerUnlocked() {
+ MutexAutoLock lock(mLock);
+ MaybeStartTickler();
+}
+
+void Tickler::MaybeStartTickler() {
+ mLock.AssertCurrentThreadOwns();
+ if (!NS_IsMainThread()) {
+ NS_DispatchToMainThread(
+ NewRunnableMethod("net::Tickler::MaybeStartTicklerUnlocked", this,
+ &Tickler::MaybeStartTicklerUnlocked));
+ return;
+ }
+
+ if (!mPrefs) mPrefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
+ if (mPrefs) {
+ int32_t val;
+ bool boolVal;
+
+ if (NS_SUCCEEDED(
+ mPrefs->GetBoolPref("network.tickle-wifi.enabled", &boolVal)))
+ mEnabled = boolVal;
+
+ if (NS_SUCCEEDED(
+ mPrefs->GetIntPref("network.tickle-wifi.duration", &val))) {
+ if (val < 1) val = 1;
+ if (val > 100000) val = 100000;
+ mDuration = TimeDuration::FromMilliseconds(val);
+ }
+
+ if (NS_SUCCEEDED(mPrefs->GetIntPref("network.tickle-wifi.delay", &val))) {
+ if (val < 1) val = 1;
+ if (val > 1000) val = 1000;
+ mDelay = static_cast<uint32_t>(val);
+ }
+ }
+
+ PostCheckTickler();
+}
+
+void Tickler::CheckTickler() {
+ MutexAutoLock lock(mLock);
+ MOZ_ASSERT(mThread == NS_GetCurrentThread());
+
+ bool shouldRun =
+ (!mCanceled) && ((TimeStamp::Now() - mLastTickle) <= mDuration);
+
+ if ((shouldRun && mActive) || (!shouldRun && !mActive))
+ return; // no change in state
+
+ if (mActive)
+ StopTickler();
+ else
+ StartTickler();
+}
+
+void Tickler::Cancel() {
+ MutexAutoLock lock(mLock);
+ MOZ_ASSERT(NS_IsMainThread());
+ mCanceled = true;
+ if (mThread) PostCheckTickler();
+}
+
+void Tickler::StopTickler() {
+ mLock.AssertCurrentThreadOwns();
+ MOZ_ASSERT(mThread == NS_GetCurrentThread());
+ MOZ_ASSERT(mTimer);
+ MOZ_ASSERT(mActive);
+
+ mTimer->Cancel();
+ mActive = false;
+}
+
+class TicklerTimer final : public nsITimerCallback, public nsINamed {
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSITIMERCALLBACK
+
+ explicit TicklerTimer(Tickler* aTickler) {
+ mTickler = do_GetWeakReference(aTickler);
+ }
+
+ // nsINamed
+ NS_IMETHOD GetName(nsACString& aName) override {
+ aName.AssignLiteral("TicklerTimer");
+ return NS_OK;
+ }
+
+ private:
+ ~TicklerTimer() {}
+
+ nsWeakPtr mTickler;
+};
+
+void Tickler::StartTickler() {
+ mLock.AssertCurrentThreadOwns();
+ MOZ_ASSERT(mThread == NS_GetCurrentThread());
+ MOZ_ASSERT(!mActive);
+ MOZ_ASSERT(mTimer);
+
+ if (NS_SUCCEEDED(mTimer->InitWithCallback(new TicklerTimer(this),
+ mEnabled ? mDelay : 1000,
+ nsITimer::TYPE_REPEATING_SLACK)))
+ mActive = true;
+}
+
+// argument should be in network byte order
+void Tickler::SetIPV4Address(uint32_t address) { mAddr.inet.ip = address; }
+
+// argument should be in network byte order
+void Tickler::SetIPV4Port(uint16_t port) { mAddr.inet.port = port; }
+
+NS_IMPL_ISUPPORTS(TicklerTimer, nsITimerCallback, nsINamed)
+
+NS_IMETHODIMP TicklerTimer::Notify(nsITimer* timer) {
+ RefPtr<Tickler> tickler = do_QueryReferent(mTickler);
+ if (!tickler) return NS_ERROR_FAILURE;
+ MutexAutoLock lock(tickler->mLock);
+
+ if (!tickler->mFD) {
+ tickler->StopTickler();
+ return NS_ERROR_FAILURE;
+ }
+
+ if (tickler->mCanceled ||
+ ((TimeStamp::Now() - tickler->mLastTickle) > tickler->mDuration)) {
+ tickler->StopTickler();
+ return NS_OK;
+ }
+
+ if (!tickler->mEnabled) return NS_OK;
+
+ PR_SendTo(tickler->mFD, "", 0, 0, &tickler->mAddr, 0);
+ return NS_OK;
+}
+
+} // namespace net
+} // namespace mozilla
+
+#else // not defined MOZ_USE_WIFI_TICKLER
+
+namespace mozilla {
+namespace net {
+NS_IMPL_ISUPPORTS0(Tickler)
+} // namespace net
+} // namespace mozilla
+
+#endif // defined MOZ_USE_WIFI_TICKLER