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/*
* Copyright (C) 2020 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.
*/
#pragma once
#include <pwd.h>
#include <sys/wait.h>
#include <unistd.h>
#include <atomic>
#include <optional>
#include <sstream>
#include "common/libs/fs/shared_fd.h"
#include "request.h"
namespace cuttlefish {
constexpr char kEbtablesName[] = "ebtables";
constexpr char kEbtablesLegacyName[] = "ebtables-legacy";
// Wireless network prefix
constexpr char kWirelessIp[] = "192.168.96";
// Mobile network prefix
constexpr char kMobileIp[] = "192.168.97";
// Ethernet network prefix
constexpr char kEthernetIp[] = "192.168.98";
// permission bits for socket
constexpr int kSocketMode = 0666;
// Max ID an interface can have
// Note: Interface names only have 2 digits in addition to the username prefix
// Additionally limited by available netmask values in MobileNetworkName
// Exceeding 63 would result in an overflow when calculating the netmask
constexpr uint32_t kMaxIfaceNameId = 63;
// struct for managing configuration state
struct EthernetNetworkConfig {
bool has_broute_ipv4 = false;
bool has_broute_ipv6 = false;
bool has_tap = false;
bool use_ebtables_legacy = false;
};
// struct for managing configuration state
struct GatewayConfig {
bool has_gateway = false;
bool has_dnsmasq = false;
bool has_iptable = false;
};
int RunExternalCommand(const std::string& command);
std::optional<std::string> GetUserName(uid_t uid);
bool AddTapIface(const std::string& name);
bool CreateTap(const std::string& name);
bool BringUpIface(const std::string& name);
bool ShutdownIface(const std::string& name);
bool DestroyIface(const std::string& name);
bool DeleteIface(const std::string& name);
bool CreateBridge(const std::string& name);
bool DestroyBridge(const std::string& name);
bool CreateEbtables(const std::string& name, bool use_ipv,
bool use_ebtables_legacy);
bool DestroyEbtables(const std::string& name, bool use_ipv4,
bool use_ebtables_legacy);
bool EbtablesBroute(const std::string& name, bool use_ipv4, bool add,
bool use_ebtables_legacy);
bool EbtablesFilter(const std::string& name, bool use_ipv4, bool add,
bool use_ebtables_legacy);
bool CreateMobileIface(const std::string& name, uint16_t id,
const std::string& ipaddr);
bool DestroyMobileIface(const std::string& name, uint16_t id,
const std::string& ipaddr);
bool CreateEthernetIface(const std::string& name, const std::string& bridge_name,
bool has_ipv4_bridge, bool has_ipv6_bridge,
bool use_ebtables_legacy);
bool DestroyEthernetIface(const std::string& name,
bool has_ipv4_bridge, bool use_ipv6,
bool use_ebtables_legacy);
void CleanupEthernetIface(const std::string& name,
const EthernetNetworkConfig& config);
bool IptableConfig(const std::string& network, bool add);
bool LinkTapToBridge(const std::string& tap_name,
const std::string& bridge_name);
bool SetupBridgeGateway(const std::string& name, const std::string& ipaddr);
void CleanupBridgeGateway(const std::string& name, const std::string& ipaddr,
const GatewayConfig& config);
bool CreateEthernetBridgeIface(const std::string& name,
const std::string &ipaddr);
bool DestroyEthernetBridgeIface(const std::string& name,
const std::string &ipaddr);
bool AddGateway(const std::string& name, const std::string& gateway,
const std::string& netmask);
bool DestroyGateway(const std::string& name, const std::string& gateway,
const std::string& netmask);
bool StartDnsmasq(const std::string& bridge_name, const std::string& gateway,
const std::string& dhcp_range);
bool StopDnsmasq(const std::string& name);
} // namespace cuttlefish
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