2 * Copyright (C) 2011 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 #ifndef _BANDWIDTH_CONTROLLER_H
17 #define _BANDWIDTH_CONTROLLER_H
21 #include <utility> // for pair
23 class BandwidthController {
28 : rxBytes(-1), rxPackets(-1),
29 txBytes(-1), txPackets(-1) {};
30 TetherStats(std::string ifnIn, std::string ifnOut,
31 int64_t rxB, int64_t rxP,
32 int64_t txB, int64_t txP)
33 : ifaceIn(ifnIn), ifaceOut(ifnOut),
34 rxBytes(rxB), rxPackets(rxP),
35 txBytes(txB), txPackets(txP) {};
38 int64_t rxBytes, rxPackets;
39 int64_t txBytes, txPackets;
41 * Allocates a new string representing this:
42 * ifaceIn ifaceOut rx_bytes rx_packets tx_bytes tx_packets
43 * The caller is responsible for free()'ing the returned ptr.
45 char *getStatsLine(void);
48 BandwidthController();
50 int setupIptablesHooks(void);
52 int enableBandwidthControl(bool force);
53 int disableBandwidthControl(void);
55 int setInterfaceSharedQuota(const char *iface, int64_t bytes);
56 int getInterfaceSharedQuota(int64_t *bytes);
57 int removeInterfaceSharedQuota(const char *iface);
59 int setInterfaceQuota(const char *iface, int64_t bytes);
60 int getInterfaceQuota(const char *iface, int64_t *bytes);
61 int removeInterfaceQuota(const char *iface);
63 int addNaughtyApps(int numUids, char *appUids[]);
64 int removeNaughtyApps(int numUids, char *appUids[]);
66 int setGlobalAlert(int64_t bytes);
67 int removeGlobalAlert(void);
68 int setGlobalAlertInForwardChain(void);
69 int removeGlobalAlertInForwardChain(void);
71 int setSharedAlert(int64_t bytes);
72 int removeSharedAlert(void);
74 int setInterfaceAlert(const char *iface, int64_t bytes);
75 int removeInterfaceAlert(const char *iface);
78 * stats should have ifaceIn and ifaceOut initialized.
79 * Byte counts should be left to the default (-1).
81 int getTetherStats(TetherStats &stats, std::string &extraProcessingInfo);
83 static const char* LOCAL_INPUT;
84 static const char* LOCAL_FORWARD;
85 static const char* LOCAL_OUTPUT;
86 static const char* LOCAL_RAW_PREROUTING;
87 static const char* LOCAL_MANGLE_POSTROUTING;
92 QuotaInfo(std::string ifn, int64_t q, int64_t a)
93 : ifaceName(ifn), quota(q), alert(a) {};
94 std::string ifaceName;
99 enum IptIpVer { IptIpV4, IptIpV6 };
100 enum IptOp { IptOpInsert, IptOpReplace, IptOpDelete };
101 enum IptRejectOp { IptRejectAdd, IptRejectNoAdd };
102 enum NaughtyAppOp { NaughtyAppOpAdd, NaughtyAppOpRemove };
103 enum QuotaType { QuotaUnique, QuotaShared };
104 enum RunCmdErrHandling { RunCmdFailureBad, RunCmdFailureOk };
106 enum IptFailureLog { IptFailShow, IptFailHide };
108 enum IptFailureLog { IptFailShow, IptFailHide = IptFailShow };
110 int maninpulateNaughtyApps(int numUids, char *appStrUids[], NaughtyAppOp appOp);
112 int prepCostlyIface(const char *ifn, QuotaType quotaType);
113 int cleanupCostlyIface(const char *ifn, QuotaType quotaType);
115 std::string makeIptablesNaughtyCmd(IptOp op, int uid);
116 std::string makeIptablesQuotaCmd(IptOp op, const char *costName, int64_t quota);
118 int runIptablesAlertCmd(IptOp op, const char *alertName, int64_t bytes);
119 int runIptablesAlertFwdCmd(IptOp op, const char *alertName, int64_t bytes);
121 /* Runs for both ipv4 and ipv6 iptables */
122 int runCommands(int numCommands, const char *commands[], RunCmdErrHandling cmdErrHandling);
123 /* Runs for both ipv4 and ipv6 iptables, appends -j REJECT --reject-with ... */
124 static int runIpxtablesCmd(const char *cmd, IptRejectOp rejectHandling,
125 IptFailureLog failureHandling = IptFailShow);
126 static int runIptablesCmd(const char *cmd, IptRejectOp rejectHandling, IptIpVer iptIpVer,
127 IptFailureLog failureHandling = IptFailShow);
130 // Provides strncpy() + check overflow.
131 static int StrncpyAndCheck(char *buffer, const char *src, size_t buffSize);
133 int updateQuota(const char *alertName, int64_t bytes);
135 int setCostlyAlert(const char *costName, int64_t bytes, int64_t *alertBytes);
136 int removeCostlyAlert(const char *costName, int64_t *alertBytes);
139 * stats should have ifaceIn and ifaceOut initialized.
140 * fp should be a file to the FORWARD rules of iptables.
141 * extraProcessingInfo: contains raw parsed data, and error info.
143 static int parseForwardChainStats(TetherStats &stats, FILE *fp,
144 std::string &extraProcessingInfo);
146 /*------------------*/
148 std::list<std::string> sharedQuotaIfaces;
149 int64_t sharedQuotaBytes;
150 int64_t sharedAlertBytes;
151 int64_t globalAlertBytes;
153 * This tracks the number of tethers setup.
154 * The FORWARD chain is updated in the following cases:
155 * - The 1st time a globalAlert is setup and there are tethers setup.
156 * - Anytime a globalAlert is removed and there are tethers setup.
157 * - The 1st tether is setup and there is a globalAlert active.
158 * - The last tether is removed and there is a globalAlert active.
160 int globalAlertTetherCount;
162 std::list<QuotaInfo> quotaIfaces;
163 std::list<int /*appUid*/> naughtyAppUids;
166 static const char *IPT_FLUSH_COMMANDS[];
167 static const char *IPT_CLEANUP_COMMANDS[];
168 static const char *IPT_SETUP_COMMANDS[];
169 static const char *IPT_BASIC_ACCOUNTING_COMMANDS[];
172 static const int ALERT_RULE_POS_IN_COSTLY_CHAIN;
173 static const char ALERT_GLOBAL_NAME[];
174 static const int MAX_CMD_ARGS;
175 static const int MAX_CMD_LEN;
176 static const int MAX_IFACENAME_LEN;
177 static const int MAX_IPT_OUTPUT_LINE_LEN;
180 * When false, it will directly use system() instead of logwrap()
182 static bool useLogwrapCall;