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 #include <sysutils/SocketClient.h>
24 #include <utils/RWLock.h>
26 #include "NetdConstants.h"
28 class BandwidthController {
35 : rxBytes(-1), rxPackets(-1),
36 txBytes(-1), txPackets(-1) {};
37 TetherStats(std::string intIfn, std::string extIfn,
38 int64_t rxB, int64_t rxP,
39 int64_t txB, int64_t txP)
40 : intIface(intIfn), extIface(extIfn),
41 rxBytes(rxB), rxPackets(rxP),
42 txBytes(txB), txPackets(txP) {};
43 /* Internal interface. Same as NatController's notion. */
45 /* External interface. Same as NatController's notion. */
47 int64_t rxBytes, rxPackets;
48 int64_t txBytes, txPackets;
50 * Allocates a new string representing this:
51 * intIface extIface rx_bytes rx_packets tx_bytes tx_packets
52 * The caller is responsible for free()'ing the returned ptr.
54 char *getStatsLine(void) const;
57 BandwidthController();
59 int setupIptablesHooks(void);
61 int enableBandwidthControl(bool force);
62 int disableBandwidthControl(void);
63 int enableDataSaver(bool enable);
65 int setInterfaceSharedQuota(const char *iface, int64_t bytes);
66 int getInterfaceSharedQuota(int64_t *bytes);
67 int removeInterfaceSharedQuota(const char *iface);
69 int setInterfaceQuota(const char *iface, int64_t bytes);
70 int getInterfaceQuota(const char *iface, int64_t *bytes);
71 int removeInterfaceQuota(const char *iface);
73 int addNaughtyApps(int numUids, char *appUids[]);
74 int removeNaughtyApps(int numUids, char *appUids[]);
75 int addNiceApps(int numUids, char *appUids[]);
76 int removeNiceApps(int numUids, char *appUids[]);
78 int setGlobalAlert(int64_t bytes);
79 int removeGlobalAlert(void);
80 int setGlobalAlertInForwardChain(void);
81 int removeGlobalAlertInForwardChain(void);
83 int setSharedAlert(int64_t bytes);
84 int removeSharedAlert(void);
86 int setInterfaceAlert(const char *iface, int64_t bytes);
87 int removeInterfaceAlert(const char *iface);
90 * For single pair of ifaces, stats should have ifaceIn and ifaceOut initialized.
91 * For all pairs, stats should have ifaceIn=ifaceOut="".
92 * Sends out to the cli the single stat (TetheringStatsReluts) or a list of stats
93 * (TetheringStatsListResult+CommandOkay).
94 * Error is to be handled on the outside.
95 * It results in an error if invoked and no tethering counter rules exist.
97 int getTetherStats(SocketClient *cli, TetherStats &stats, std::string &extraProcessingInfo);
99 static const char* LOCAL_INPUT;
100 static const char* LOCAL_FORWARD;
101 static const char* LOCAL_OUTPUT;
102 static const char* LOCAL_RAW_PREROUTING;
103 static const char* LOCAL_MANGLE_POSTROUTING;
108 QuotaInfo(std::string ifn, int64_t q, int64_t a)
109 : ifaceName(ifn), quota(q), alert(a) {};
110 std::string ifaceName;
115 enum IptIpVer { IptIpV4, IptIpV6 };
116 enum IptOp { IptOpInsert, IptOpReplace, IptOpDelete, IptOpAppend };
117 enum IptJumpOp { IptJumpReject, IptJumpReturn, IptJumpNoAdd };
118 enum SpecialAppOp { SpecialAppOpAdd, SpecialAppOpRemove };
119 enum QuotaType { QuotaUnique, QuotaShared };
120 enum RunCmdErrHandling { RunCmdFailureBad, RunCmdFailureOk };
122 enum IptFailureLog { IptFailShow, IptFailHide };
124 enum IptFailureLog { IptFailShow, IptFailHide = IptFailShow };
127 int manipulateSpecialApps(int numUids, char *appStrUids[],
129 IptJumpOp jumpHandling, SpecialAppOp appOp);
130 int manipulateNaughtyApps(int numUids, char *appStrUids[], SpecialAppOp appOp);
131 int manipulateNiceApps(int numUids, char *appStrUids[], SpecialAppOp appOp);
133 int prepCostlyIface(const char *ifn, QuotaType quotaType);
134 int cleanupCostlyIface(const char *ifn, QuotaType quotaType);
136 std::string makeIptablesSpecialAppCmd(IptOp op, int uid, const char *chain);
137 std::string makeIptablesQuotaCmd(IptOp op, const char *costName, int64_t quota);
139 int runIptablesAlertCmd(IptOp op, const char *alertName, int64_t bytes);
140 int runIptablesAlertFwdCmd(IptOp op, const char *alertName, int64_t bytes);
142 /* Runs for both ipv4 and ipv6 iptables */
143 int runCommands(int numCommands, const char *commands[], RunCmdErrHandling cmdErrHandling);
144 /* Runs for both ipv4 and ipv6 iptables, appends -j REJECT --reject-with ... */
145 static int runIpxtablesCmd(const char *cmd, IptJumpOp jumpHandling,
146 IptFailureLog failureHandling = IptFailShow);
147 static int runIptablesCmd(const char *cmd, IptJumpOp jumpHandling, IptIpVer iptIpVer,
148 IptFailureLog failureHandling = IptFailShow);
151 // Provides strncpy() + check overflow.
152 static int StrncpyAndCheck(char *buffer, const char *src, size_t buffSize);
154 int updateQuota(const char *alertName, int64_t bytes);
156 int setCostlyAlert(const char *costName, int64_t bytes, int64_t *alertBytes);
157 int removeCostlyAlert(const char *costName, int64_t *alertBytes);
160 * stats should never have only intIface initialized. Other 3 combos are ok.
161 * fp should be a file to the apropriate FORWARD chain of iptables rules.
162 * extraProcessingInfo: contains raw parsed data, and error info.
163 * This strongly requires that setup of the rules is in a specific order:
164 * in:intIface out:extIface
165 * in:extIface out:intIface
166 * and the rules are grouped in pairs when more that one tethering was setup.
168 static int parseForwardChainStats(SocketClient *cli, const TetherStats filter, FILE *fp,
169 std::string &extraProcessingInfo);
172 * Attempt to find the bw_costly_* tables that need flushing,
174 * If doClean then remove the tables also.
175 * Deals with both ip4 and ip6 tables.
177 void flushExistingCostlyTables(bool doClean);
178 static void parseAndFlushCostlyTables(FILE *fp, bool doRemove);
181 * Attempt to flush our tables.
182 * If doClean then remove them also.
183 * Deals with both ip4 and ip6 tables.
185 void flushCleanTables(bool doClean);
187 /*------------------*/
189 std::list<std::string> sharedQuotaIfaces;
190 int64_t sharedQuotaBytes;
191 int64_t sharedAlertBytes;
192 int64_t globalAlertBytes;
194 * This tracks the number of tethers setup.
195 * The FORWARD chain is updated in the following cases:
196 * - The 1st time a globalAlert is setup and there are tethers setup.
197 * - Anytime a globalAlert is removed and there are tethers setup.
198 * - The 1st tether is setup and there is a globalAlert active.
199 * - The last tether is removed and there is a globalAlert active.
201 int globalAlertTetherCount;
203 std::list<QuotaInfo> quotaIfaces;
206 friend class BandwidthControllerTest;
207 static int (*execFunction)(int, char **, int *, bool, bool);
208 static FILE *(*popenFunction)(const char *, const char *);
209 static int (*iptablesRestoreFunction)(IptablesTarget, const std::string&);