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/*
* Copyright (C) 2018 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. 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)
#include "Logging.h"
#include "NetworkConnectionToWebProcess.h"
#include "WebMDNSRegisterMessages.h"
#include <pal/SessionID.h>
#include <wtf/UUID.h>
#include <wtf/text/StringConcatenateNumbers.h>
namespace WebKit {
#define MDNS_RELEASE_LOG(fmt, ...) RELEASE_LOG(Network, "%p - NetworkMDNSRegister::" fmt, this, ##__VA_ARGS__)
#define MDNS_RELEASE_LOG_IN_CALLBACK(sessionID, fmt, ...) RELEASE_LOG(Network, "NetworkMDNSRegister callback - " fmt, ##__VA_ARGS__)
NetworkMDNSRegister::NetworkMDNSRegister(NetworkConnectionToWebProcess& connection)
: m_connection(connection)
{
}
NetworkMDNSRegister::~NetworkMDNSRegister()
{
#if ENABLE_MDNS
for (auto& value : m_services.values())
DNSServiceRefDeallocate(value);
#endif
}
#if ENABLE_MDNS
void NetworkMDNSRegister::unregisterMDNSNames(WebCore::ScriptExecutionContextIdentifier documentIdentifier)
{
auto iterator = m_services.find(documentIdentifier);
if (iterator == m_services.end())
return;
DNSServiceRefDeallocate(iterator->value);
m_services.remove(iterator);
}
struct PendingRegistrationRequest {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
PendingRegistrationRequest(Ref<IPC::Connection>&& connection, MDNSRegisterIdentifier requestIdentifier, String&& name, PAL::SessionID sessionID)
: connection(WTFMove(connection))
, requestIdentifier(requestIdentifier)
, name(WTFMove(name))
, sessionID(sessionID)
{
}
Ref<IPC::Connection> connection;
MDNSRegisterIdentifier requestIdentifier;
String name;
PAL::SessionID sessionID;
DNSRecordRef record;
};
static uintptr_t pendingRegistrationRequestCount = 1;
static HashMap<uintptr_t, std::unique_ptr<PendingRegistrationRequest>>& pendingRegistrationRequests()
{
ASSERT(RunLoop::isMain());
static NeverDestroyed<HashMap<uintptr_t, std::unique_ptr<PendingRegistrationRequest>>> map;
return map;
}
static void registerMDNSNameCallback(DNSServiceRef, DNSRecordRef record, DNSServiceFlags, DNSServiceErrorType errorCode, void *context)
{
auto request = pendingRegistrationRequests().take(reinterpret_cast<uintptr_t>(context));
if (!request)
return;
MDNS_RELEASE_LOG_IN_CALLBACK(request->sessionID, "registerMDNSNameCallback with error %d", errorCode);
if (errorCode) {
request->connection->send(Messages::WebMDNSRegister::FinishedRegisteringMDNSName { request->requestIdentifier, request->name, WebCore::MDNSRegisterError::DNSSD }, 0);
return;
}
request->connection->send(Messages::WebMDNSRegister::FinishedRegisteringMDNSName { request->requestIdentifier, request->name, { } }, 0);
}
void NetworkMDNSRegister::registerMDNSName(MDNSRegisterIdentifier requestIdentifier, WebCore::ScriptExecutionContextIdentifier documentIdentifier, const String& ipAddress)
{
auto name = makeString(UUID::createVersion4(), ".local"_s);
DNSServiceRef service;
auto iterator = m_services.find(documentIdentifier);
if (iterator == m_services.end()) {
auto error = DNSServiceCreateConnection(&service);
if (error) {
MDNS_RELEASE_LOG("registerMDNSName DNSServiceCreateConnection error %d", error);
m_connection.connection().send(Messages::WebMDNSRegister::FinishedRegisteringMDNSName { requestIdentifier, name, WebCore::MDNSRegisterError::DNSSD }, 0);
return;
}
error = DNSServiceSetDispatchQueue(service, dispatch_get_main_queue());
if (error) {
MDNS_RELEASE_LOG("registerMDNSName DNSServiceCreateConnection error %d", error);
m_connection.connection().send(Messages::WebMDNSRegister::FinishedRegisteringMDNSName { requestIdentifier, name, WebCore::MDNSRegisterError::DNSSD }, 0);
return;
}
ASSERT(service);
m_services.add(documentIdentifier, service);
} else
service = iterator->value;
auto ip = inet_addr(ipAddress.utf8().data());
// FIXME: Add IPv6 support.
if (ip == ( in_addr_t)(-1)) {
MDNS_RELEASE_LOG("registerMDNSName inet_addr error");
m_connection.connection().send(Messages::WebMDNSRegister::FinishedRegisteringMDNSName { requestIdentifier, name, WebCore::MDNSRegisterError::BadParameter }, 0);
return;
}
auto pendingRequest = makeUnique<PendingRegistrationRequest>(m_connection.connection(), requestIdentifier, WTFMove(name), sessionID());
auto* record = &pendingRequest->record;
auto error = DNSServiceRegisterRecord(service,
record,
#if HAVE(MDNS_FAST_REGISTRATION)
kDNSServiceFlagsKnownUnique,
#else
kDNSServiceFlagsUnique,
#endif
0,
pendingRequest->name.utf8().data(),
kDNSServiceType_A,
kDNSServiceClass_IN,
4,
&ip,
0,
registerMDNSNameCallback,
reinterpret_cast<void*>(pendingRegistrationRequestCount));
if (error) {
MDNS_RELEASE_LOG("registerMDNSName DNSServiceRegisterRecord error %d", error);
m_connection.connection().send(Messages::WebMDNSRegister::FinishedRegisteringMDNSName { requestIdentifier, pendingRequest->name, WebCore::MDNSRegisterError::DNSSD }, 0);
return;
}
pendingRegistrationRequests().add(pendingRegistrationRequestCount++, WTFMove(pendingRequest));
}
#else
void NetworkMDNSRegister::unregisterMDNSNames(WebCore::ScriptExecutionContextIdentifier)
{
}
void NetworkMDNSRegister::registerMDNSName(MDNSRegisterIdentifier requestIdentifier, WebCore::ScriptExecutionContextIdentifier documentIdentifier, const String& ipAddress)
{
MDNS_RELEASE_LOG("registerMDNSName not implemented");
auto name = makeString(UUID::createVersion4(), ".local"_s);
m_connection.connection().send(Messages::WebMDNSRegister::FinishedRegisteringMDNSName { requestIdentifier, name, WebCore::MDNSRegisterError::NotImplemented }, 0);
}
#endif
PAL::SessionID NetworkMDNSRegister::sessionID() const
{
return m_connection.sessionID();
}
} // namespace WebKit
#undef MDNS_RELEASE_LOG
#undef MDNS_RELEASE_LOG_IN_CALLBACK
#endif // ENABLE(WEB_RTC)
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