/* * Copyright (C) 2008 Apple Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "NetworkStateNotifier.h" #include <wtf/MainThread.h> #include <wtf/Vector.h> #include <winsock2.h> #include <iphlpapi.h> namespace WebCore { void NetworkStateNotifier::updateStateWithoutNotifying() { DWORD size = 0; if (::GetAdaptersAddresses(AF_UNSPEC, 0, 0, 0, &size) != ERROR_BUFFER_OVERFLOW) return; Vector<char> buffer(size); auto addresses = reinterpret_cast<PIP_ADAPTER_ADDRESSES>(buffer.data()); if (::GetAdaptersAddresses(AF_UNSPEC, 0, 0, addresses, &size) != ERROR_SUCCESS) return; for (; addresses; addresses = addresses->Next) { if (addresses->IfType != MIB_IF_TYPE_LOOPBACK && addresses->OperStatus == IfOperStatusUp) { // We found an interface that was up. m_isOnLine = true; return; } } m_isOnLine = false; } void CALLBACK NetworkStateNotifier::addressChangeCallback(void*, BOOLEAN timedOut) { callOnMainThread([] { // NotifyAddrChange only notifies us of a single address change. Now that we've been notified, // we need to call it again so we'll get notified the *next* time. singleton().registerForAddressChange(); singleton().updateStateSoon(); }); } void NetworkStateNotifier::registerForAddressChange() { HANDLE handle; ::NotifyAddrChange(&handle, &m_overlapped); } void NetworkStateNotifier::startObserving() { memset(&m_overlapped, 0, sizeof(m_overlapped)); m_overlapped.hEvent = ::CreateEvent(0, false, false, 0); ::RegisterWaitForSingleObject(&m_waitHandle, m_overlapped.hEvent, addressChangeCallback, nullptr, INFINITE, 0); registerForAddressChange(); } } // namespace WebCore