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/*
* Copyright (C) 2018 Apple Inc. All rights reserved.
* Copyright (C) 2025 Comcast Inc.
*
* 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. 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 ITS 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 "NetworkMDNSRegister.h"
#if ENABLE(WEB_RTC) && USE(GLIB)
#include "NetworkConnectionToWebProcess.h"
#include <WebCore/MDNSRegisterError.h>
#include <gio/gio.h>
#include <wtf/Markable.h>
#include <wtf/UUID.h>
#include <wtf/glib/GRefPtr.h>
#include <wtf/glib/GUniquePtr.h>
#include <wtf/text/MakeString.h>
namespace WebKit {
NetworkMDNSRegister::NetworkMDNSRegister(NetworkConnectionToWebProcess& connection)
: m_connection(connection)
{
m_cancellable = adoptGRef(g_cancellable_new());
g_dbus_proxy_new_for_bus(G_BUS_TYPE_SYSTEM, G_DBUS_PROXY_FLAGS_NONE, nullptr, "org.freedesktop.Avahi", "/", "org.freedesktop.Avahi.Server", m_cancellable.get(), [](GObject*, GAsyncResult* result, gpointer userData) {
GUniqueOutPtr<GError> error;
auto self = reinterpret_cast<NetworkMDNSRegister*>(userData);
self->m_dbusProxy = adoptGRef(g_dbus_proxy_new_for_bus_finish(result, &error.outPtr()));
if (!error)
return;
#if PLATFORM(GTK)
// Check if the connection to the system bus was refused, don't log an error when that
// happens because it is expected when running as a Flatpak app.
if (g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
return;
#endif
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED))
LOG_ERROR("Unable to connect to the Avahi daemon: %s", error->message);
}, this);
}
NetworkMDNSRegister::~NetworkMDNSRegister()
{
g_cancellable_cancel(m_cancellable.get());
}
void NetworkMDNSRegister::registerMDNSName(WebCore::ScriptExecutionContextIdentifier documentIdentifier, const String& ipAddress, CompletionHandler<void(const String&, std::optional<WebCore::MDNSRegisterError>)>&& completionHandler)
{
auto name = makeString(WTF::UUID::createVersion4(), ".local"_s);
if (ipAddress == "0.0.0.0"_s || ipAddress == "::"_s) {
completionHandler(name, WebCore::MDNSRegisterError::BadParameter);
return;
}
if (!m_dbusProxy) {
completionHandler(name, WebCore::MDNSRegisterError::Internal);
return;
}
m_registeredNames.add(name);
m_perDocumentRegisteredNames.ensure(documentIdentifier, [] {
return Vector<String>();
}).iterator->value.append(name);
Ref connection = m_connection.get();
auto request = makeUnique<PendingRegistrationRequest>(connection.get(), WTFMove(name), ipAddress, sessionID(), WTFMove(completionHandler));
request->cancellable = m_cancellable;
g_dbus_proxy_call(m_dbusProxy.get(), "EntryGroupNew", g_variant_new("()"), G_DBUS_CALL_FLAGS_NONE, -1, m_cancellable.get(), [](GObject* object, GAsyncResult* result, gpointer userData) {
std::unique_ptr<PendingRegistrationRequest> request;
request.reset(reinterpret_cast<PendingRegistrationRequest*>(userData));
GUniqueOutPtr<GError> error;
auto variant = adoptGRef(g_dbus_proxy_call_finish(G_DBUS_PROXY(object), result, &error.outPtr()));
if (error) {
// We might have access to the system bus but Avahi is not activatable/installed, don't
// log an error when that is the case.
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)
&& !g_error_matches(error.get(), G_DBUS_ERROR, G_DBUS_ERROR_SERVICE_UNKNOWN)) {
LOG_ERROR("Unable to add Avahi entry group: %s", error->message);
}
request->completionHandler(request->name, WebCore::MDNSRegisterError::Internal);
return;
}
GUniqueOutPtr<char> objectPath;
g_variant_get(variant.get(), "(o)", &objectPath.outPtr());
g_dbus_proxy_new_for_bus(G_BUS_TYPE_SYSTEM, G_DBUS_PROXY_FLAGS_NONE, nullptr, "org.freedesktop.Avahi", objectPath.get(), "org.freedesktop.Avahi.EntryGroup", request->cancellable.get(), [](GObject*, GAsyncResult* result, gpointer userData) {
std::unique_ptr<PendingRegistrationRequest> request;
request.reset(reinterpret_cast<PendingRegistrationRequest*>(userData));
GUniqueOutPtr<GError> error;
auto dbusProxy = adoptGRef(g_dbus_proxy_new_for_bus_finish(result, &error.outPtr()));
if (error) {
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED))
LOG_ERROR("Unable to create DBus proxy for Avahi entry group: %s", error->message);
request->completionHandler(request->name, WebCore::MDNSRegisterError::Internal);
return;
}
int interface = -1;
int protocol = -1;
uint32_t flags = 16; // AVAHI_PUBLISH_NO_REVERSE
g_dbus_proxy_call(dbusProxy.get(), "AddAddress", g_variant_new("(iiuss)", interface, protocol, flags, request->name.ascii().data(), request->address.ascii().data()), G_DBUS_CALL_FLAGS_NONE, -1, request->cancellable.get(), [](GObject* object, GAsyncResult* result, gpointer userData) {
std::unique_ptr<PendingRegistrationRequest> request;
request.reset(reinterpret_cast<PendingRegistrationRequest*>(userData));
GUniqueOutPtr<GError> error;
auto proxy = G_DBUS_PROXY(object);
auto finalResult = adoptGRef(g_dbus_proxy_call_finish(proxy, result, &error.outPtr()));
if (!finalResult) {
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED))
LOG_ERROR("Unable to register MDNS address %s to Avahi: %s", request->name.ascii().data(), error->message);
request->completionHandler(request->name, WebCore::MDNSRegisterError::Internal);
return;
}
g_dbus_proxy_call(proxy, "Commit", g_variant_new("()"), G_DBUS_CALL_FLAGS_NONE, -1, request->cancellable.get(), [](GObject* object, GAsyncResult* result, gpointer userData) {
std::unique_ptr<PendingRegistrationRequest> request;
request.reset(reinterpret_cast<PendingRegistrationRequest*>(userData));
GUniqueOutPtr<GError> error;
auto finalResult = adoptGRef(g_dbus_proxy_call_finish(G_DBUS_PROXY(object), result, &error.outPtr()));
if (!finalResult) {
if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED))
LOG_ERROR("Unable to commit MDNS address %s to Avahi: %s", request->name.ascii().data(), error->message);
request->completionHandler(request->name, WebCore::MDNSRegisterError::Internal);
return;
}
request->completionHandler(request->name, { });
}, request.release());
}, request.release());
}, request.release());
}, request.release());
}
} // namespace WebKit
#endif // ENABLE(WEB_RTC) && USE(GLIB)
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