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// Copyright 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef FIREWALLD_IPTABLES_H_
#define FIREWALLD_IPTABLES_H_
#include <stdint.h>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include <base/macros.h>
#include <brillo/errors/error.h>
#include "dbus_bindings/org.chromium.Firewalld.h"
namespace firewalld {
enum ProtocolEnum { kProtocolTcp, kProtocolUdp };
class IpTables : public org::chromium::FirewalldInterface {
public:
typedef std::pair<uint16_t, std::string> Hole;
IpTables();
~IpTables();
// D-Bus methods.
bool PunchTcpHole(uint16_t in_port, const std::string& in_interface) override;
bool PunchUdpHole(uint16_t in_port, const std::string& in_interface) override;
bool PlugTcpHole(uint16_t in_port, const std::string& in_interface) override;
bool PlugUdpHole(uint16_t in_port, const std::string& in_interface) override;
bool RequestVpnSetup(const std::vector<std::string>& usernames,
const std::string& interface) override;
bool RemoveVpnSetup(const std::vector<std::string>& usernames,
const std::string& interface) override;
// Close all outstanding firewall holes.
void PlugAllHoles();
private:
friend class IpTablesTest;
FRIEND_TEST(IpTablesTest, ApplyVpnSetupAdd_Success);
FRIEND_TEST(IpTablesTest, ApplyVpnSetupAdd_FailureInUsername);
FRIEND_TEST(IpTablesTest, ApplyVpnSetupAdd_FailureInMasquerade);
FRIEND_TEST(IpTablesTest, ApplyVpnSetupAdd_FailureInRuleForUserTraffic);
FRIEND_TEST(IpTablesTest, ApplyVpnSetupRemove_Success);
FRIEND_TEST(IpTablesTest, ApplyVpnSetupRemove_Failure);
bool PunchHole(uint16_t port,
const std::string& interface,
std::set<Hole>* holes,
ProtocolEnum protocol);
bool PlugHole(uint16_t port,
const std::string& interface,
std::set<Hole>* holes,
ProtocolEnum protocol);
bool AddAcceptRules(ProtocolEnum protocol,
uint16_t port,
const std::string& interface);
bool DeleteAcceptRules(ProtocolEnum protocol,
uint16_t port,
const std::string& interface);
virtual bool AddAcceptRule(const std::string& executable_path,
ProtocolEnum protocol,
uint16_t port,
const std::string& interface);
virtual bool DeleteAcceptRule(const std::string& executable_path,
ProtocolEnum protocol,
uint16_t port,
const std::string& interface);
bool ApplyVpnSetup(const std::vector<std::string>& usernames,
const std::string& interface,
bool add);
virtual bool ApplyMasquerade(const std::string& interface, bool add);
bool ApplyMasqueradeWithExecutable(const std::string& interface,
const std::string& executable_path,
bool add);
virtual bool ApplyMarkForUserTraffic(const std::string& username, bool add);
bool ApplyMarkForUserTrafficWithExecutable(const std::string& username,
const std::string& executable_path,
bool add);
virtual bool ApplyRuleForUserTraffic(bool add);
bool ApplyRuleForUserTrafficWithVersion(const std::string& ip_version,
bool add);
int ExecvNonRoot(const std::vector<std::string>& argv, uint64_t capmask);
// Keep track of firewall holes to avoid adding redundant firewall rules.
std::set<Hole> tcp_holes_;
std::set<Hole> udp_holes_;
// Tracks whether IPv6 filtering is enabled. If set to |true| (the default),
// then it is required to be working. If |false|, then adding of IPv6 rules is
// still attempted but not mandatory; however, if it is successful even once,
// then it'll be changed to |true| and enforced thereafter.
bool ip6_enabled_ = true;
DISALLOW_COPY_AND_ASSIGN(IpTables);
};
} // namespace firewalld
#endif // FIREWALLD_IPTABLES_H_
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