/*
|
* Copyright (C) 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 NETD_SERVER_ROUTE_CONTROLLER_H
|
#define NETD_SERVER_ROUTE_CONTROLLER_H
|
|
#include "NetdConstants.h"
|
#include "Permission.h"
|
|
#include <android-base/thread_annotations.h>
|
|
#include <linux/netlink.h>
|
#include <sys/types.h>
|
#include <map>
|
#include <mutex>
|
|
namespace android {
|
namespace net {
|
|
class UidRanges;
|
|
class RouteController {
|
public:
|
// How the routing table number is determined for route modification requests.
|
enum TableType {
|
INTERFACE, // Compute the table number based on the interface index.
|
LOCAL_NETWORK, // A fixed table used for routes to directly-connected clients/peers.
|
LEGACY_NETWORK, // Use a fixed table that's used to override the default network.
|
LEGACY_SYSTEM, // A fixed table, only modifiable by system apps; overrides VPNs too.
|
};
|
|
static const int ROUTE_TABLE_OFFSET_FROM_INDEX = 1000;
|
|
static const char* const LOCAL_MANGLE_INPUT;
|
|
static int Init(unsigned localNetId) WARN_UNUSED_RESULT;
|
|
// Returns an ifindex given the interface name, by looking up in sInterfaceToTable.
|
// This is currently only used by NetworkController::addInterfaceToNetwork
|
// and should probabaly be changed to passing the ifindex into RouteController instead.
|
// We do this instead of calling if_nametoindex because the same interface name can
|
// correspond to different interface indices over time. This way, even if the interface
|
// index has changed, we can still free any map entries indexed by the ifindex that was
|
// used to add them.
|
static uint32_t getIfIndex(const char* interface) EXCLUDES(sInterfaceToTableLock);
|
|
static int addInterfaceToLocalNetwork(unsigned netId, const char* interface) WARN_UNUSED_RESULT;
|
static int removeInterfaceFromLocalNetwork(unsigned netId,
|
const char* interface) WARN_UNUSED_RESULT;
|
|
static int addInterfaceToPhysicalNetwork(unsigned netId, const char* interface,
|
Permission permission) WARN_UNUSED_RESULT;
|
static int removeInterfaceFromPhysicalNetwork(unsigned netId, const char* interface,
|
Permission permission) WARN_UNUSED_RESULT;
|
|
static int addInterfaceToVirtualNetwork(unsigned netId, const char* interface, bool secure,
|
const UidRanges& uidRanges) WARN_UNUSED_RESULT;
|
static int removeInterfaceFromVirtualNetwork(unsigned netId, const char* interface, bool secure,
|
const UidRanges& uidRanges) WARN_UNUSED_RESULT;
|
|
static int modifyPhysicalNetworkPermission(unsigned netId, const char* interface,
|
Permission oldPermission,
|
Permission newPermission) WARN_UNUSED_RESULT;
|
|
static int addUsersToVirtualNetwork(unsigned netId, const char* interface, bool secure,
|
const UidRanges& uidRanges) WARN_UNUSED_RESULT;
|
static int removeUsersFromVirtualNetwork(unsigned netId, const char* interface, bool secure,
|
const UidRanges& uidRanges) WARN_UNUSED_RESULT;
|
|
static int addUsersToRejectNonSecureNetworkRule(const UidRanges& uidRanges)
|
WARN_UNUSED_RESULT;
|
static int removeUsersFromRejectNonSecureNetworkRule(const UidRanges& uidRanges)
|
WARN_UNUSED_RESULT;
|
|
static int addInterfaceToDefaultNetwork(const char* interface,
|
Permission permission) WARN_UNUSED_RESULT;
|
static int removeInterfaceFromDefaultNetwork(const char* interface,
|
Permission permission) WARN_UNUSED_RESULT;
|
|
// |nexthop| can be NULL (to indicate a directly-connected route), "unreachable" (to indicate a
|
// route that's blocked), "throw" (to indicate the lack of a match), or a regular IP address.
|
static int addRoute(const char* interface, const char* destination, const char* nexthop,
|
TableType tableType) WARN_UNUSED_RESULT;
|
static int removeRoute(const char* interface, const char* destination, const char* nexthop,
|
TableType tableType) WARN_UNUSED_RESULT;
|
|
static int enableTethering(const char* inputInterface,
|
const char* outputInterface) WARN_UNUSED_RESULT;
|
static int disableTethering(const char* inputInterface,
|
const char* outputInterface) WARN_UNUSED_RESULT;
|
|
static int addVirtualNetworkFallthrough(unsigned vpnNetId, const char* physicalInterface,
|
Permission permission) WARN_UNUSED_RESULT;
|
static int removeVirtualNetworkFallthrough(unsigned vpnNetId, const char* physicalInterface,
|
Permission permission) WARN_UNUSED_RESULT;
|
|
// For testing.
|
static int (*iptablesRestoreCommandFunction)(IptablesTarget, const std::string&,
|
const std::string&, std::string *);
|
|
private:
|
friend class RouteControllerTest;
|
|
static std::mutex sInterfaceToTableLock;
|
static std::map<std::string, uint32_t> sInterfaceToTable GUARDED_BY(sInterfaceToTableLock);
|
|
static int configureDummyNetwork();
|
static int flushRoutes(const char* interface) EXCLUDES(sInterfaceToTableLock);
|
static int flushRoutes(uint32_t table);
|
static uint32_t getRouteTableForInterfaceLocked(const char *interface)
|
REQUIRES(sInterfaceToTableLock);
|
static uint32_t getRouteTableForInterface(const char *interface) EXCLUDES(sInterfaceToTableLock);
|
static int modifyDefaultNetwork(uint16_t action, const char* interface, Permission permission);
|
static int modifyPhysicalNetwork(unsigned netId, const char* interface, Permission permission,
|
bool add);
|
static int modifyRoute(uint16_t action, const char* interface, const char* destination,
|
const char* nexthop, TableType tableType);
|
static int modifyTetheredNetwork(uint16_t action, const char* inputInterface,
|
const char* outputInterface);
|
static int modifyVpnFallthroughRule(uint16_t action, unsigned vpnNetId,
|
const char* physicalInterface, Permission permission);
|
static int modifyVirtualNetwork(unsigned netId, const char* interface,
|
const UidRanges& uidRanges, bool secure, bool add,
|
bool modifyNonUidBasedRules);
|
static void updateTableNamesFile() EXCLUDES(sInterfaceToTableLock);
|
};
|
|
// Public because they are called by by RouteControllerTest.cpp.
|
// TODO: come up with a scheme of unit testing this code that does not rely on making all its
|
// functions public.
|
int modifyIpRoute(uint16_t action, uint32_t table, const char* interface, const char* destination,
|
const char* nexthop) WARN_UNUSED_RESULT;
|
int flushRoutes(uint32_t table) WARN_UNUSED_RESULT;
|
uint32_t getRulePriority(const nlmsghdr *nlh);
|
WARN_UNUSED_RESULT int modifyIncomingPacketMark(unsigned netId, const char* interface,
|
Permission permission, bool add);
|
|
} // namespace net
|
} // namespace android
|
|
#endif // NETD_SERVER_ROUTE_CONTROLLER_H
|
