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serenity/Userland/Services/LookupServer/LookupServer.h
Max Wipfli 4efccbd030 LookupServer: Watch /etc/hosts for changes during runtime
This adds a FileWatcher to the LookupServer which watches '/etc/hosts'
for changes during runtime and reloads its contents. If the file is
deleted, m_etc_hosts will be cleared.

Since we now need to access '/etc/hosts' later during runtime, it needs
to be unveiled with read permissions.
2021-06-09 17:43:32 +04:30

44 lines
1.1 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "DNSName.h"
#include "DNSPacket.h"
#include "DNSServer.h"
#include "MulticastDNS.h"
#include <LibCore/FileWatcher.h>
#include <LibCore/Object.h>
namespace LookupServer {
class DNSAnswer;
class LookupServer final : public Core::Object {
C_OBJECT(LookupServer);
public:
static LookupServer& the();
Vector<DNSAnswer> lookup(const DNSName& name, DNSRecordType record_type);
private:
LookupServer();
void load_etc_hosts();
void put_in_cache(const DNSAnswer&);
Vector<DNSAnswer> lookup(const DNSName& hostname, const String& nameserver, bool& did_get_response, DNSRecordType record_type, ShouldRandomizeCase = ShouldRandomizeCase::Yes);
RefPtr<Core::LocalServer> m_local_server;
RefPtr<DNSServer> m_dns_server;
RefPtr<MulticastDNS> m_mdns;
Vector<String> m_nameservers;
RefPtr<Core::FileWatcher> m_file_watcher;
HashMap<DNSName, Vector<DNSAnswer>, DNSName::Traits> m_etc_hosts;
HashMap<DNSName, Vector<DNSAnswer>, DNSName::Traits> m_lookup_cache;
};
}