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/*
* Copyright (C) 2008 Apple Inc. All rights reserved.
* Copyright (C) 2009, 2012, 2020 Igalia S.L.
*
* 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 AND ITS CONTRIBUTORS "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 "DNSResolveQueueGLib.h"
#if USE(GLIB)
#include <gio/gio.h>
#include <wtf/Function.h>
#include <wtf/MainThread.h>
#include <wtf/glib/GUniquePtr.h>
#include <wtf/text/CString.h>
namespace WebCore {
// Initially true to ensure prefetch stays disabled until we have proxy settings.
static bool isUsingHttpProxy = true;
static bool isUsingHttpsProxy = true;
static bool didResolveProxy(char** uris)
{
// We have a list of possible proxies to use for the URI. If the first item in the list is
// direct:// (the usual case), then the user prefers not to use a proxy. This is similar to
// resolving hostnames: there could be many possibilities returned in order of preference, and
// if we're trying to connect we should attempt each one in order, but here we are not trying
// to connect, merely to decide whether a proxy "should" be used.
return uris && *uris && strcmp(*uris, "direct://");
}
static void didResolveProxy(GProxyResolver* resolver, GAsyncResult* result, bool* isUsingProxyType, bool* isUsingProxy)
{
GUniqueOutPtr<GError> error;
GUniquePtr<char*> uris(g_proxy_resolver_lookup_finish(resolver, result, &error.outPtr()));
if (error) {
WTFLogAlways("Error determining system proxy settings: %s", error->message);
return;
}
*isUsingProxyType = didResolveProxy(uris.get());
*isUsingProxy = isUsingHttpProxy || isUsingHttpsProxy;
}
static void proxyResolvedForHttpUriCallback(GObject* source, GAsyncResult* result, void* userData)
{
didResolveProxy(G_PROXY_RESOLVER(source), result, &isUsingHttpProxy, static_cast<bool*>(userData));
}
static void proxyResolvedForHttpsUriCallback(GObject* source, GAsyncResult* result, void* userData)
{
didResolveProxy(G_PROXY_RESOLVER(source), result, &isUsingHttpsProxy, static_cast<bool*>(userData));
}
void DNSResolveQueueGLib::updateIsUsingProxy()
{
GProxyResolver* resolver = g_proxy_resolver_get_default();
g_proxy_resolver_lookup_async(resolver, "http://example.com/", nullptr, proxyResolvedForHttpUriCallback, &m_isUsingProxy);
g_proxy_resolver_lookup_async(resolver, "https://example.com/", nullptr, proxyResolvedForHttpsUriCallback, &m_isUsingProxy);
}
void DNSResolveQueueGLib::platformResolve(const String& hostname)
{
ASSERT(isMainThread());
GRefPtr<GResolver> resolver = adoptGRef(g_resolver_get_default());
g_resolver_lookup_by_name_async(resolver.get(), hostname.utf8().data(), nullptr, [](GObject* resolver, GAsyncResult* result, gpointer) {
GList* addresses = g_resolver_lookup_by_name_finish(G_RESOLVER(resolver), result, nullptr);
g_clear_pointer(&addresses, g_resolver_free_addresses);
DNSResolveQueue::singleton().decrementRequestCount();
}, nullptr);
}
void DNSResolveQueueGLib::resolve(const String& hostname, uint64_t identifier, DNSCompletionHandler&& completionHandler)
{
ASSERT(isMainThread());
GRefPtr<GResolver> resolver = adoptGRef(g_resolver_get_default());
auto request = makeUnique<DNSResolveQueueGLib::Request>(identifier, WTFMove(completionHandler));
GRefPtr<GCancellable> cancellable = adoptGRef(g_cancellable_new());
g_resolver_lookup_by_name_async(resolver.get(), hostname.utf8().data(), cancellable.get(), [](GObject* resolver, GAsyncResult* result, gpointer userData) {
std::unique_ptr<DNSResolveQueueGLib::Request> request(static_cast<DNSResolveQueueGLib::Request*>(userData));
GUniqueOutPtr<GError> error;
GList* addresses = g_resolver_lookup_by_name_finish(G_RESOLVER(resolver), result, &error.outPtr());
if (g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
request->completionHandler(makeUnexpected(DNSError::Cancelled));
return;
}
static_cast<DNSResolveQueueGLib&>(DNSResolveQueue::singleton()).m_requestCancellables.remove(request->identifier);
if (error) {
request->completionHandler(makeUnexpected(DNSError::CannotResolve));
return;
}
Vector<WebCore::IPAddress> addressList;
for (auto* iter = addresses; iter; iter = g_list_next(iter)) {
auto* address = G_INET_ADDRESS(iter->data);
switch (g_inet_address_get_family(address)) {
case G_SOCKET_FAMILY_IPV4: {
struct in_addr ipv4Address;
memcpy(&ipv4Address, g_inet_address_to_bytes(address), g_inet_address_get_native_size(address));
addressList.append(IPAddress(ipv4Address));
break;
}
case G_SOCKET_FAMILY_IPV6: {
struct in6_addr ipv6Address;
memcpy(&ipv6Address, g_inet_address_to_bytes(address), g_inet_address_get_native_size(address));
addressList.append(IPAddress(ipv6Address));
break;
}
case G_SOCKET_FAMILY_INVALID:
case G_SOCKET_FAMILY_UNIX:
break;
}
}
if (addressList.isEmpty()) {
request->completionHandler(makeUnexpected(WebCore::DNSError::CannotResolve));
return;
}
request->completionHandler(WTFMove(addressList));
}, request.release());
m_requestCancellables.add(identifier, WTFMove(cancellable));
}
void DNSResolveQueueGLib::stopResolve(uint64_t identifier)
{
ASSERT(isMainThread());
if (auto cancellable = m_requestCancellables.take(identifier))
g_cancellable_cancel(cancellable.get());
}
} // namespace WebCore
#endif // USE(GLIB)
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