JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 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 |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 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. |
| 15 | */ |
| 16 | |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 17 | // #define LOG_NDEBUG 0 |
| 18 | |
| 19 | /* |
| 20 | * The CommandListener, FrameworkListener don't allow for |
| 21 | * multiple calls in parallel to reach the BandwidthController. |
| 22 | * If they ever were to allow it, then netd/ would need some tweaking. |
| 23 | */ |
| 24 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 25 | #include <errno.h> |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 26 | #include <fcntl.h> |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 27 | #include <stdio.h> |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 28 | #include <stdlib.h> |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 29 | #include <string.h> |
| 30 | |
| 31 | #include <sys/socket.h> |
| 32 | #include <sys/stat.h> |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/wait.h> |
| 35 | |
| 36 | #include <linux/netlink.h> |
| 37 | #include <linux/rtnetlink.h> |
| 38 | #include <linux/pkt_sched.h> |
| 39 | |
| 40 | #define LOG_TAG "BandwidthController" |
| 41 | #include <cutils/log.h> |
| 42 | #include <cutils/properties.h> |
| 43 | |
| 44 | extern "C" int logwrap(int argc, const char **argv, int background); |
| 45 | |
| 46 | #include "BandwidthController.h" |
| 47 | |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 48 | /* Alphabetical */ |
JP Abgrall | 8766669 | 2011-09-08 13:44:10 -0700 | [diff] [blame] | 49 | const char BandwidthController::ALERT_IPT_TEMPLATE[] = "%s %s %s -m quota2 ! --quota %lld --name %s"; |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 50 | const int BandwidthController::ALERT_RULE_POS_IN_COSTLY_CHAIN = 4; |
| 51 | const char BandwidthController::IP6TABLES_PATH[] = "/system/bin/ip6tables"; |
| 52 | const char BandwidthController::IPTABLES_PATH[] = "/system/bin/iptables"; |
| 53 | const int BandwidthController::MAX_CMD_ARGS = 32; |
| 54 | const int BandwidthController::MAX_CMD_LEN = 1024; |
| 55 | const int BandwidthController::MAX_IFACENAME_LEN = 64; |
| 56 | const int BandwidthController::MAX_IPT_OUTPUT_LINE_LEN = 256; |
| 57 | |
JP Abgrall | 11b4e9b | 2011-08-11 15:34:49 -0700 | [diff] [blame] | 58 | bool BandwidthController::useLogwrapCall = false; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 59 | |
| 60 | /** |
| 61 | * Some comments about the rules: |
| 62 | * * Ordering |
| 63 | * - when an interface is marked as costly it should be INSERTED into the INPUT/OUTPUT chains. |
| 64 | * E.g. "-I INPUT -i rmnet0 --goto costly" |
| 65 | * - quota'd rules in the costly chain should be before penalty_box lookups. |
| 66 | * |
| 67 | * * global quota vs per interface quota |
| 68 | * - global quota for all costly interfaces uses a single costly chain: |
| 69 | * . initial rules |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 70 | * iptables -N costly_shared |
| 71 | * iptables -I INPUT -i iface0 --goto costly_shared |
| 72 | * iptables -I OUTPUT -o iface0 --goto costly_shared |
| 73 | * iptables -I costly_shared -m quota \! --quota 500000 \ |
| 74 | * --jump REJECT --reject-with icmp-net-prohibited |
| 75 | * iptables -A costly_shared --jump penalty_box |
| 76 | * iptables -A costly_shared -m owner --socket-exists |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 77 | * |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 78 | * . adding a new iface to this, E.g.: |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 79 | * iptables -I INPUT -i iface1 --goto costly_shared |
| 80 | * iptables -I OUTPUT -o iface1 --goto costly_shared |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 81 | * |
| 82 | * - quota per interface. This is achieve by having "costly" chains per quota. |
| 83 | * E.g. adding a new costly interface iface0 with its own quota: |
| 84 | * iptables -N costly_iface0 |
| 85 | * iptables -I INPUT -i iface0 --goto costly_iface0 |
| 86 | * iptables -I OUTPUT -o iface0 --goto costly_iface0 |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 87 | * iptables -A costly_iface0 -m quota \! --quota 500000 \ |
| 88 | * --jump REJECT --reject-with icmp-net-prohibited |
| 89 | * iptables -A costly_iface0 --jump penalty_box |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 90 | * iptables -A costly_iface0 -m owner --socket-exists |
| 91 | * |
| 92 | * * penalty_box handling: |
| 93 | * - only one penalty_box for all interfaces |
| 94 | * E.g Adding an app: |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 95 | * iptables -A penalty_box -m owner --uid-owner app_3 \ |
| 96 | * --jump REJECT --reject-with icmp-net-prohibited |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 97 | */ |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 98 | const char *BandwidthController::IPT_CLEANUP_COMMANDS[] = { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 99 | /* Cleanup rules. */ |
| 100 | "-F", |
| 101 | "-t raw -F", |
JP Abgrall | 39f8f24 | 2011-06-29 19:21:58 -0700 | [diff] [blame] | 102 | /* TODO: If at some point we need more user chains than here, then we will need |
| 103 | * a different cleanup approach. |
| 104 | */ |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 105 | "-X", /* Should normally only be costly_shared, penalty_box, and costly_<iface> */ |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 106 | }; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 107 | |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 108 | const char *BandwidthController::IPT_SETUP_COMMANDS[] = { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 109 | /* Created needed chains. */ |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 110 | "-N costly_shared", |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 111 | "-N penalty_box", |
| 112 | }; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 113 | |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 114 | const char *BandwidthController::IPT_BASIC_ACCOUNTING_COMMANDS[] = { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 115 | "-F INPUT", |
| 116 | "-A INPUT -i lo --jump ACCEPT", |
| 117 | "-A INPUT -m owner --socket-exists", /* This is a tracking rule. */ |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 118 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 119 | "-F OUTPUT", |
| 120 | "-A OUTPUT -o lo --jump ACCEPT", |
| 121 | "-A OUTPUT -m owner --socket-exists", /* This is a tracking rule. */ |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 122 | |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 123 | "-F costly_shared", |
| 124 | "-A costly_shared --jump penalty_box", |
| 125 | "-A costly_shared -m owner --socket-exists", /* This is a tracking rule. */ |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 126 | /* TODO(jpa): Figure out why iptables doesn't correctly return from this |
| 127 | * chain. For now, hack the chain exit with an ACCEPT. |
| 128 | */ |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 129 | "-A costly_shared --jump ACCEPT", |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 130 | }; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 131 | |
| 132 | BandwidthController::BandwidthController(void) { |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 133 | char value[PROPERTY_VALUE_MAX]; |
| 134 | |
| 135 | property_get("persist.bandwidth.enable", value, "0"); |
| 136 | if (!strcmp(value, "1")) { |
| 137 | enableBandwidthControl(); |
| 138 | } |
| 139 | |
JP Abgrall | 11b4e9b | 2011-08-11 15:34:49 -0700 | [diff] [blame] | 140 | property_get("persist.bandwidth.uselogwrap", value, "0"); |
| 141 | useLogwrapCall = !strcmp(value, "1"); |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 142 | } |
| 143 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 144 | int BandwidthController::runIpxtablesCmd(const char *cmd, IptRejectOp rejectHandling) { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 145 | int res = 0; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 146 | |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 147 | LOGV("runIpxtablesCmd(cmd=%s)", cmd); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 148 | res |= runIptablesCmd(cmd, rejectHandling, IptIpV4); |
| 149 | res |= runIptablesCmd(cmd, rejectHandling, IptIpV6); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 150 | return res; |
| 151 | } |
| 152 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 153 | int BandwidthController::StrncpyAndCheck(char *buffer, const char *src, size_t buffSize) { |
| 154 | |
| 155 | memset(buffer, '\0', buffSize); // strncpy() is not filling leftover with '\0' |
| 156 | strncpy(buffer, src, buffSize); |
| 157 | return buffer[buffSize - 1]; |
| 158 | } |
| 159 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 160 | int BandwidthController::runIptablesCmd(const char *cmd, IptRejectOp rejectHandling, |
| 161 | IptIpVer iptVer) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 162 | char buffer[MAX_CMD_LEN]; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 163 | const char *argv[MAX_CMD_ARGS]; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 164 | int argc = 0; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 165 | char *next = buffer; |
| 166 | char *tmp; |
JP Abgrall | 11b4e9b | 2011-08-11 15:34:49 -0700 | [diff] [blame] | 167 | int res; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 168 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 169 | std::string fullCmd = cmd; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 170 | |
| 171 | if (rejectHandling == IptRejectAdd) { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 172 | fullCmd += " --jump REJECT --reject-with"; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 173 | switch (iptVer) { |
| 174 | case IptIpV4: |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 175 | fullCmd += " icmp-net-prohibited"; |
| 176 | break; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 177 | case IptIpV6: |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 178 | fullCmd += " icmp6-adm-prohibited"; |
| 179 | break; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 180 | } |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 181 | } |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 182 | |
JP Abgrall | 11b4e9b | 2011-08-11 15:34:49 -0700 | [diff] [blame] | 183 | fullCmd.insert(0, " "); |
| 184 | fullCmd.insert(0, iptVer == IptIpV4 ? IPTABLES_PATH : IP6TABLES_PATH); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 185 | |
JP Abgrall | 11b4e9b | 2011-08-11 15:34:49 -0700 | [diff] [blame] | 186 | if (!useLogwrapCall) { |
| 187 | res = system(fullCmd.c_str()); |
| 188 | } else { |
| 189 | if (StrncpyAndCheck(buffer, fullCmd.c_str(), sizeof(buffer))) { |
| 190 | LOGE("iptables command too long"); |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 191 | return -1; |
| 192 | } |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 193 | |
JP Abgrall | 11b4e9b | 2011-08-11 15:34:49 -0700 | [diff] [blame] | 194 | argc = 0; |
| 195 | while ((tmp = strsep(&next, " "))) { |
| 196 | argv[argc++] = tmp; |
| 197 | if (argc >= MAX_CMD_ARGS) { |
| 198 | LOGE("iptables argument overflow"); |
| 199 | return -1; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | argv[argc] = NULL; |
| 204 | res = logwrap(argc, argv, 0); |
| 205 | } |
| 206 | if (res) { |
| 207 | LOGE("runIptablesCmd(): failed %s res=%d", fullCmd.c_str(), res); |
| 208 | } |
| 209 | return res; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 210 | } |
| 211 | |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 212 | int BandwidthController::enableBandwidthControl(void) { |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 213 | int res; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 214 | |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 215 | /* Let's pretend we started from scratch ... */ |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 216 | sharedQuotaIfaces.clear(); |
| 217 | quotaIfaces.clear(); |
| 218 | naughtyAppUids.clear(); |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 219 | globalAlertBytes = 0; |
| 220 | sharedQuotaBytes = sharedAlertBytes = 0; |
| 221 | |
| 222 | |
| 223 | /* Some of the initialCommands are allowed to fail */ |
| 224 | runCommands(sizeof(IPT_CLEANUP_COMMANDS) / sizeof(char*), |
| 225 | IPT_CLEANUP_COMMANDS, RunCmdFailureOk); |
| 226 | runCommands(sizeof(IPT_SETUP_COMMANDS) / sizeof(char*), |
| 227 | IPT_SETUP_COMMANDS, RunCmdFailureOk); |
| 228 | res = runCommands(sizeof(IPT_BASIC_ACCOUNTING_COMMANDS) / sizeof(char*), |
| 229 | IPT_BASIC_ACCOUNTING_COMMANDS, RunCmdFailureBad); |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 230 | |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 231 | return res; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 232 | |
| 233 | } |
| 234 | |
| 235 | int BandwidthController::disableBandwidthControl(void) { |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 236 | /* The IPT_CLEANUP_COMMANDS are allowed to fail. */ |
| 237 | runCommands(sizeof(IPT_CLEANUP_COMMANDS) / sizeof(char*), |
| 238 | IPT_CLEANUP_COMMANDS, RunCmdFailureOk); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 239 | return 0; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 240 | } |
| 241 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 242 | int BandwidthController::runCommands(int numCommands, const char *commands[], |
| 243 | RunCmdErrHandling cmdErrHandling) { |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 244 | int res = 0; |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 245 | LOGV("runCommands(): %d commands", numCommands); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 246 | for (int cmdNum = 0; cmdNum < numCommands; cmdNum++) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 247 | res = runIpxtablesCmd(commands[cmdNum], IptRejectNoAdd); |
| 248 | if (res && cmdErrHandling != RunCmdFailureBad) |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 249 | return res; |
| 250 | } |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 251 | return cmdErrHandling == RunCmdFailureBad ? res : 0; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 252 | } |
| 253 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 254 | std::string BandwidthController::makeIptablesNaughtyCmd(IptOp op, int uid) { |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 255 | std::string res; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 256 | char *buff; |
| 257 | const char *opFlag; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 258 | |
| 259 | switch (op) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 260 | case IptOpInsert: |
| 261 | opFlag = "-I"; |
| 262 | break; |
| 263 | case IptOpReplace: |
| 264 | opFlag = "-R"; |
| 265 | break; |
| 266 | default: |
| 267 | case IptOpDelete: |
| 268 | opFlag = "-D"; |
| 269 | break; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 270 | } |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 271 | asprintf(&buff, "%s penalty_box -m owner --uid-owner %d", opFlag, uid); |
| 272 | res = buff; |
| 273 | free(buff); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 274 | return res; |
| 275 | } |
| 276 | |
| 277 | int BandwidthController::addNaughtyApps(int numUids, char *appUids[]) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 278 | return maninpulateNaughtyApps(numUids, appUids, NaughtyAppOpAdd); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | int BandwidthController::removeNaughtyApps(int numUids, char *appUids[]) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 282 | return maninpulateNaughtyApps(numUids, appUids, NaughtyAppOpRemove); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 283 | } |
| 284 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 285 | int BandwidthController::maninpulateNaughtyApps(int numUids, char *appStrUids[], NaughtyAppOp appOp) { |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 286 | char cmd[MAX_CMD_LEN]; |
| 287 | int uidNum; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 288 | const char *failLogTemplate; |
| 289 | IptOp op; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 290 | int appUids[numUids]; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 291 | std::string naughtyCmd; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 292 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 293 | switch (appOp) { |
| 294 | case NaughtyAppOpAdd: |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 295 | op = IptOpInsert; |
| 296 | failLogTemplate = "Failed to add app uid %d to penalty box."; |
| 297 | break; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 298 | case NaughtyAppOpRemove: |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 299 | op = IptOpDelete; |
| 300 | failLogTemplate = "Failed to delete app uid %d from penalty box."; |
| 301 | break; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | for (uidNum = 0; uidNum < numUids; uidNum++) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 305 | appUids[uidNum] = atol(appStrUids[uidNum]); |
| 306 | if (appUids[uidNum] == 0) { |
| 307 | LOGE(failLogTemplate, appUids[uidNum]); |
| 308 | goto fail_parse; |
| 309 | } |
| 310 | } |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 311 | |
| 312 | for (uidNum = 0; uidNum < numUids; uidNum++) { |
| 313 | naughtyCmd = makeIptablesNaughtyCmd(op, appUids[uidNum]); |
| 314 | if (runIpxtablesCmd(naughtyCmd.c_str(), IptRejectAdd)) { |
| 315 | LOGE(failLogTemplate, appUids[uidNum]); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 316 | goto fail_with_uidNum; |
| 317 | } |
| 318 | } |
| 319 | return 0; |
| 320 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 321 | fail_with_uidNum: |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 322 | /* Try to remove the uid that failed in any case*/ |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 323 | naughtyCmd = makeIptablesNaughtyCmd(IptOpDelete, appUids[uidNum]); |
| 324 | runIpxtablesCmd(naughtyCmd.c_str(), IptRejectAdd); |
| 325 | fail_parse: |
| 326 | return -1; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 327 | } |
| 328 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 329 | std::string BandwidthController::makeIptablesQuotaCmd(IptOp op, const char *costName, int64_t quota) { |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 330 | std::string res; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 331 | char *buff; |
| 332 | const char *opFlag; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 333 | |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 334 | LOGV("makeIptablesQuotaCmd(%d, %lld)", op, quota); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 335 | |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 336 | switch (op) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 337 | case IptOpInsert: |
| 338 | opFlag = "-I"; |
| 339 | break; |
| 340 | case IptOpReplace: |
| 341 | opFlag = "-R"; |
| 342 | break; |
| 343 | default: |
| 344 | case IptOpDelete: |
| 345 | opFlag = "-D"; |
| 346 | break; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 347 | } |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 348 | |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 349 | // The requried IP version specific --jump REJECT ... will be added later. |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 350 | asprintf(&buff, "%s costly_%s -m quota2 ! --quota %lld --name %s", opFlag, costName, quota, |
| 351 | costName); |
| 352 | res = buff; |
| 353 | free(buff); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 354 | return res; |
| 355 | } |
| 356 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 357 | int BandwidthController::prepCostlyIface(const char *ifn, QuotaType quotaType) { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 358 | char cmd[MAX_CMD_LEN]; |
| 359 | int res = 0; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 360 | int ruleInsertPos = 1; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 361 | std::string costString; |
| 362 | const char *costCString; |
| 363 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 364 | /* The "-N costly" is created upfront, no need to handle it here. */ |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 365 | switch (quotaType) { |
| 366 | case QuotaUnique: |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 367 | costString = "costly_"; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 368 | costString += ifn; |
| 369 | costCString = costString.c_str(); |
| 370 | snprintf(cmd, sizeof(cmd), "-N %s", costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 371 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 372 | snprintf(cmd, sizeof(cmd), "-A %s -j penalty_box", costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 373 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 374 | snprintf(cmd, sizeof(cmd), "-A %s -m owner --socket-exists", costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 375 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 376 | /* TODO(jpa): Figure out why iptables doesn't correctly return from this |
| 377 | * chain. For now, hack the chain exit with an ACCEPT. |
| 378 | */ |
| 379 | snprintf(cmd, sizeof(cmd), "-A %s --jump ACCEPT", costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 380 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
| 381 | break; |
| 382 | case QuotaShared: |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 383 | costCString = "costly_shared"; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 384 | break; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 385 | } |
| 386 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 387 | if (globalAlertBytes) { |
| 388 | /* The alert rule comes 1st */ |
| 389 | ruleInsertPos = 2; |
| 390 | } |
| 391 | snprintf(cmd, sizeof(cmd), "-I INPUT %d -i %s --goto %s", ruleInsertPos, ifn, costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 392 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 393 | snprintf(cmd, sizeof(cmd), "-I OUTPUT %d -o %s --goto %s", ruleInsertPos, ifn, costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 394 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 395 | return res; |
| 396 | } |
| 397 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 398 | int BandwidthController::cleanupCostlyIface(const char *ifn, QuotaType quotaType) { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 399 | char cmd[MAX_CMD_LEN]; |
| 400 | int res = 0; |
| 401 | std::string costString; |
| 402 | const char *costCString; |
| 403 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 404 | switch (quotaType) { |
| 405 | case QuotaUnique: |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 406 | costString = "costly_"; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 407 | costString += ifn; |
| 408 | costCString = costString.c_str(); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 409 | break; |
| 410 | case QuotaShared: |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 411 | costCString = "costly_shared"; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 412 | break; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | snprintf(cmd, sizeof(cmd), "-D INPUT -i %s --goto %s", ifn, costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 416 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 417 | snprintf(cmd, sizeof(cmd), "-D OUTPUT -o %s --goto %s", ifn, costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 418 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 419 | |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 420 | /* The "-N costly_shared" is created upfront, no need to handle it here. */ |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 421 | if (quotaType == QuotaUnique) { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 422 | snprintf(cmd, sizeof(cmd), "-F %s", costCString); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 423 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | a9f802c | 2011-06-29 15:46:45 -0700 | [diff] [blame] | 424 | snprintf(cmd, sizeof(cmd), "-X %s", costCString); |
| 425 | res |= runIpxtablesCmd(cmd, IptRejectNoAdd); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 426 | } |
| 427 | return res; |
| 428 | } |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 429 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 430 | int BandwidthController::setInterfaceSharedQuota(const char *iface, int64_t maxBytes) { |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 431 | char cmd[MAX_CMD_LEN]; |
| 432 | char ifn[MAX_IFACENAME_LEN]; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 433 | int res = 0; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 434 | std::string quotaCmd; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 435 | std::string ifaceName; |
| 436 | ; |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 437 | const char *costName = "shared"; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 438 | std::list<std::string>::iterator it; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 439 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 440 | if (!maxBytes) { |
| 441 | /* Don't talk about -1, deprecate it. */ |
| 442 | LOGE("Invalid bytes value. 1..max_int64."); |
| 443 | return -1; |
| 444 | } |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 445 | if (StrncpyAndCheck(ifn, iface, sizeof(ifn))) { |
| 446 | LOGE("Interface name longer than %d", MAX_IFACENAME_LEN); |
| 447 | return -1; |
| 448 | } |
| 449 | ifaceName = ifn; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 450 | |
| 451 | if (maxBytes == -1) { |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 452 | return removeInterfaceSharedQuota(ifn); |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | /* Insert ingress quota. */ |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 456 | for (it = sharedQuotaIfaces.begin(); it != sharedQuotaIfaces.end(); it++) { |
| 457 | if (*it == ifaceName) |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 458 | break; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 459 | } |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 460 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 461 | if (it == sharedQuotaIfaces.end()) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 462 | res |= prepCostlyIface(ifn, QuotaShared); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 463 | if (sharedQuotaIfaces.empty()) { |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 464 | quotaCmd = makeIptablesQuotaCmd(IptOpInsert, costName, maxBytes); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 465 | res |= runIpxtablesCmd(quotaCmd.c_str(), IptRejectAdd); |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 466 | if (res) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 467 | LOGE("Failed set quota rule"); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 468 | goto fail; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 469 | } |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 470 | sharedQuotaBytes = maxBytes; |
| 471 | } |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 472 | sharedQuotaIfaces.push_front(ifaceName); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 473 | |
| 474 | } |
| 475 | |
| 476 | if (maxBytes != sharedQuotaBytes) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 477 | res |= updateQuota(costName, maxBytes); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 478 | if (res) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 479 | LOGE("Failed update quota for %s", costName); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 480 | goto fail; |
| 481 | } |
| 482 | sharedQuotaBytes = maxBytes; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 483 | } |
| 484 | return 0; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 485 | |
| 486 | fail: |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 487 | /* |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 488 | * TODO(jpa): once we get rid of iptables in favor of rtnetlink, reparse |
| 489 | * rules in the kernel to see which ones need cleaning up. |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 490 | * For now callers needs to choose if they want to "ndc bandwidth enable" |
| 491 | * which resets everything. |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 492 | */ |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 493 | removeInterfaceSharedQuota(ifn); |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 494 | return -1; |
| 495 | } |
| 496 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 497 | /* It will also cleanup any shared alerts */ |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 498 | int BandwidthController::removeInterfaceSharedQuota(const char *iface) { |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 499 | char ifn[MAX_IFACENAME_LEN]; |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 500 | int res = 0; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 501 | std::string ifaceName; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 502 | std::list<std::string>::iterator it; |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 503 | const char *costName = "shared"; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 504 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 505 | if (StrncpyAndCheck(ifn, iface, sizeof(ifn))) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 506 | LOGE("Interface name longer than %d", MAX_IFACENAME_LEN); |
| 507 | return -1; |
| 508 | } |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 509 | ifaceName = ifn; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 510 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 511 | for (it = sharedQuotaIfaces.begin(); it != sharedQuotaIfaces.end(); it++) { |
| 512 | if (*it == ifaceName) |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 513 | break; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 514 | } |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 515 | if (it == sharedQuotaIfaces.end()) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 516 | LOGE("No such iface %s to delete", ifn); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 517 | return -1; |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 518 | } |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 519 | |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 520 | res |= cleanupCostlyIface(ifn, QuotaShared); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 521 | sharedQuotaIfaces.erase(it); |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 522 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 523 | if (sharedQuotaIfaces.empty()) { |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 524 | std::string quotaCmd; |
JP Abgrall | bfa7466 | 2011-06-29 19:23:04 -0700 | [diff] [blame] | 525 | quotaCmd = makeIptablesQuotaCmd(IptOpDelete, costName, sharedQuotaBytes); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 526 | res |= runIpxtablesCmd(quotaCmd.c_str(), IptRejectAdd); |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 527 | sharedQuotaBytes = 0; |
| 528 | if (sharedAlertBytes) { |
| 529 | removeSharedAlert(); |
| 530 | sharedAlertBytes = 0; |
| 531 | } |
JP Abgrall | fa6f46d | 2011-06-17 23:17:28 -0700 | [diff] [blame] | 532 | } |
JP Abgrall | 4a5f5ca | 2011-06-15 18:37:39 -0700 | [diff] [blame] | 533 | return res; |
| 534 | } |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 535 | |
| 536 | int BandwidthController::setInterfaceQuota(const char *iface, int64_t maxBytes) { |
| 537 | char ifn[MAX_IFACENAME_LEN]; |
| 538 | int res = 0; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 539 | std::string ifaceName; |
| 540 | const char *costName; |
| 541 | std::list<QuotaInfo>::iterator it; |
| 542 | std::string quotaCmd; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 543 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 544 | if (!maxBytes) { |
| 545 | /* Don't talk about -1, deprecate it. */ |
| 546 | LOGE("Invalid bytes value. 1..max_int64."); |
| 547 | return -1; |
| 548 | } |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 549 | if (maxBytes == -1) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 550 | return removeInterfaceQuota(iface); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 551 | } |
| 552 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 553 | if (StrncpyAndCheck(ifn, iface, sizeof(ifn))) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 554 | LOGE("Interface name longer than %d", MAX_IFACENAME_LEN); |
| 555 | return -1; |
| 556 | } |
| 557 | ifaceName = ifn; |
| 558 | costName = iface; |
| 559 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 560 | /* Insert ingress quota. */ |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 561 | for (it = quotaIfaces.begin(); it != quotaIfaces.end(); it++) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 562 | if (it->ifaceName == ifaceName) |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 563 | break; |
| 564 | } |
| 565 | |
| 566 | if (it == quotaIfaces.end()) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 567 | res |= prepCostlyIface(ifn, QuotaUnique); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 568 | quotaCmd = makeIptablesQuotaCmd(IptOpInsert, costName, maxBytes); |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 569 | res |= runIpxtablesCmd(quotaCmd.c_str(), IptRejectAdd); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 570 | if (res) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 571 | LOGE("Failed set quota rule"); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 572 | goto fail; |
| 573 | } |
| 574 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 575 | quotaIfaces.push_front(QuotaInfo(ifaceName, maxBytes, 0)); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 576 | |
| 577 | } else { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 578 | res |= updateQuota(costName, maxBytes); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 579 | if (res) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 580 | LOGE("Failed update quota for %s", iface); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 581 | goto fail; |
| 582 | } |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 583 | it->quota = maxBytes; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 584 | } |
| 585 | return 0; |
| 586 | |
| 587 | fail: |
| 588 | /* |
| 589 | * TODO(jpa): once we get rid of iptables in favor of rtnetlink, reparse |
| 590 | * rules in the kernel to see which ones need cleaning up. |
| 591 | * For now callers needs to choose if they want to "ndc bandwidth enable" |
| 592 | * which resets everything. |
| 593 | */ |
| 594 | removeInterfaceSharedQuota(ifn); |
| 595 | return -1; |
| 596 | } |
| 597 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 598 | int BandwidthController::getInterfaceSharedQuota(int64_t *bytes) { |
| 599 | return getInterfaceQuota("shared", bytes); |
| 600 | } |
| 601 | |
| 602 | int BandwidthController::getInterfaceQuota(const char *costName, int64_t *bytes) { |
| 603 | FILE *fp; |
| 604 | char *fname; |
| 605 | int scanRes; |
| 606 | |
| 607 | asprintf(&fname, "/proc/net/xt_quota/%s", costName); |
| 608 | fp = fopen(fname, "r"); |
| 609 | free(fname); |
| 610 | if (!fp) { |
| 611 | LOGE("Reading quota %s failed (%s)", costName, strerror(errno)); |
| 612 | return -1; |
| 613 | } |
| 614 | scanRes = fscanf(fp, "%lld", bytes); |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 615 | LOGV("Read quota res=%d bytes=%lld", scanRes, *bytes); |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 616 | fclose(fp); |
| 617 | return scanRes == 1 ? 0 : -1; |
| 618 | } |
| 619 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 620 | int BandwidthController::removeInterfaceQuota(const char *iface) { |
| 621 | |
| 622 | char ifn[MAX_IFACENAME_LEN]; |
| 623 | int res = 0; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 624 | std::string ifaceName; |
| 625 | const char *costName; |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 626 | std::list<QuotaInfo>::iterator it; |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 627 | |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 628 | if (StrncpyAndCheck(ifn, iface, sizeof(ifn))) { |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 629 | LOGE("Interface name longer than %d", MAX_IFACENAME_LEN); |
| 630 | return -1; |
| 631 | } |
| 632 | ifaceName = ifn; |
| 633 | costName = iface; |
| 634 | |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 635 | for (it = quotaIfaces.begin(); it != quotaIfaces.end(); it++) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 636 | if (it->ifaceName == ifaceName) |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 637 | break; |
| 638 | } |
| 639 | |
| 640 | if (it == quotaIfaces.end()) { |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 641 | LOGE("No such iface %s to delete", ifn); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 642 | return -1; |
| 643 | } |
| 644 | |
| 645 | /* This also removes the quota command of CostlyIface chain. */ |
JP Abgrall | 26e0d49 | 2011-06-24 19:21:51 -0700 | [diff] [blame] | 646 | res |= cleanupCostlyIface(ifn, QuotaUnique); |
JP Abgrall | 0dad7c2 | 2011-06-24 11:58:14 -0700 | [diff] [blame] | 647 | |
| 648 | quotaIfaces.erase(it); |
| 649 | |
| 650 | return res; |
| 651 | } |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 652 | |
| 653 | int BandwidthController::updateQuota(const char *quotaName, int64_t bytes) { |
| 654 | FILE *fp; |
| 655 | char *fname; |
| 656 | |
| 657 | asprintf(&fname, "/proc/net/xt_quota/%s", quotaName); |
| 658 | fp = fopen(fname, "w"); |
| 659 | free(fname); |
| 660 | if (!fp) { |
| 661 | LOGE("Updating quota %s failed (%s)", quotaName, strerror(errno)); |
| 662 | return -1; |
| 663 | } |
| 664 | fprintf(fp, "%lld\n", bytes); |
| 665 | fclose(fp); |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | int BandwidthController::runIptablesAlertCmd(IptOp op, const char *alertName, int64_t bytes) { |
| 670 | int res = 0; |
| 671 | const char *opFlag; |
JP Abgrall | 8766669 | 2011-09-08 13:44:10 -0700 | [diff] [blame] | 672 | const char *ifaceLimiting; |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 673 | char *alertQuotaCmd; |
| 674 | |
| 675 | switch (op) { |
| 676 | case IptOpInsert: |
| 677 | opFlag = "-I"; |
| 678 | break; |
| 679 | case IptOpReplace: |
| 680 | opFlag = "-R"; |
| 681 | break; |
| 682 | default: |
| 683 | case IptOpDelete: |
| 684 | opFlag = "-D"; |
| 685 | break; |
| 686 | } |
| 687 | |
JP Abgrall | 8766669 | 2011-09-08 13:44:10 -0700 | [diff] [blame] | 688 | ifaceLimiting = "! -i lo+"; |
| 689 | asprintf(&alertQuotaCmd, ALERT_IPT_TEMPLATE, ifaceLimiting, opFlag, "INPUT", |
| 690 | bytes, alertName, alertName); |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 691 | res |= runIpxtablesCmd(alertQuotaCmd, IptRejectNoAdd); |
| 692 | free(alertQuotaCmd); |
JP Abgrall | 8766669 | 2011-09-08 13:44:10 -0700 | [diff] [blame] | 693 | ifaceLimiting = "! -o lo+"; |
| 694 | asprintf(&alertQuotaCmd, ALERT_IPT_TEMPLATE, ifaceLimiting, opFlag, "OUTPUT", |
| 695 | bytes, alertName, alertName); |
JP Abgrall | 8a93272 | 2011-07-13 19:17:35 -0700 | [diff] [blame] | 696 | res |= runIpxtablesCmd(alertQuotaCmd, IptRejectNoAdd); |
| 697 | free(alertQuotaCmd); |
| 698 | return res; |
| 699 | } |
| 700 | |
| 701 | int BandwidthController::setGlobalAlert(int64_t bytes) { |
| 702 | char *alertQuotaCmd; |
| 703 | const char *alertName = "globalAlert"; |
| 704 | int res = 0; |
| 705 | |
| 706 | if (!bytes) { |
| 707 | LOGE("Invalid bytes value. 1..max_int64."); |
| 708 | return -1; |
| 709 | } |
| 710 | if (globalAlertBytes) { |
| 711 | res = updateQuota(alertName, bytes); |
| 712 | } else { |
| 713 | res = runIptablesAlertCmd(IptOpInsert, alertName, bytes); |
| 714 | } |
| 715 | globalAlertBytes = bytes; |
| 716 | return res; |
| 717 | } |
| 718 | |
| 719 | int BandwidthController::removeGlobalAlert(void) { |
| 720 | char *alertQuotaCmd; |
| 721 | |
| 722 | const char *alertName = "globalAlert"; |
| 723 | int res = 0; |
| 724 | |
| 725 | if (!globalAlertBytes) { |
| 726 | LOGE("No prior alert set"); |
| 727 | return -1; |
| 728 | } |
| 729 | res = runIptablesAlertCmd(IptOpDelete, alertName, globalAlertBytes); |
| 730 | globalAlertBytes = 0; |
| 731 | return res; |
| 732 | } |
| 733 | |
| 734 | int BandwidthController::setSharedAlert(int64_t bytes) { |
| 735 | if (!sharedQuotaBytes) { |
| 736 | LOGE("Need to have a prior shared quota set to set an alert"); |
| 737 | return -1; |
| 738 | } |
| 739 | if (!bytes) { |
| 740 | LOGE("Invalid bytes value. 1..max_int64."); |
| 741 | return -1; |
| 742 | } |
| 743 | return setCostlyAlert("shared", bytes, &sharedAlertBytes); |
| 744 | } |
| 745 | |
| 746 | int BandwidthController::removeSharedAlert(void) { |
| 747 | return removeCostlyAlert("shared", &sharedAlertBytes); |
| 748 | } |
| 749 | |
| 750 | int BandwidthController::setInterfaceAlert(const char *iface, int64_t bytes) { |
| 751 | std::list<QuotaInfo>::iterator it; |
| 752 | |
| 753 | if (!bytes) { |
| 754 | LOGE("Invalid bytes value. 1..max_int64."); |
| 755 | return -1; |
| 756 | } |
| 757 | for (it = quotaIfaces.begin(); it != quotaIfaces.end(); it++) { |
| 758 | if (it->ifaceName == iface) |
| 759 | break; |
| 760 | } |
| 761 | |
| 762 | if (it == quotaIfaces.end()) { |
| 763 | LOGE("Need to have a prior interface quota set to set an alert"); |
| 764 | return -1; |
| 765 | } |
| 766 | |
| 767 | return setCostlyAlert(iface, bytes, &it->alert); |
| 768 | } |
| 769 | |
| 770 | int BandwidthController::removeInterfaceAlert(const char *iface) { |
| 771 | std::list<QuotaInfo>::iterator it; |
| 772 | |
| 773 | for (it = quotaIfaces.begin(); it != quotaIfaces.end(); it++) { |
| 774 | if (it->ifaceName == iface) |
| 775 | break; |
| 776 | } |
| 777 | |
| 778 | if (it == quotaIfaces.end()) { |
| 779 | LOGE("No prior alert set for interface %s", iface); |
| 780 | return -1; |
| 781 | } |
| 782 | |
| 783 | return removeCostlyAlert(iface, &it->alert); |
| 784 | } |
| 785 | |
| 786 | int BandwidthController::setCostlyAlert(const char *costName, int64_t bytes, int64_t *alertBytes) { |
| 787 | char *alertQuotaCmd; |
| 788 | char *chainNameAndPos; |
| 789 | int res = 0; |
| 790 | char *alertName; |
| 791 | |
| 792 | if (!bytes) { |
| 793 | LOGE("Invalid bytes value. 1..max_int64."); |
| 794 | return -1; |
| 795 | } |
| 796 | asprintf(&alertName, "%sAlert", costName); |
| 797 | if (*alertBytes) { |
| 798 | res = updateQuota(alertName, *alertBytes); |
| 799 | } else { |
| 800 | asprintf(&chainNameAndPos, "costly_%s %d", costName, ALERT_RULE_POS_IN_COSTLY_CHAIN); |
| 801 | asprintf(&alertQuotaCmd, ALERT_IPT_TEMPLATE, "-I", chainNameAndPos, bytes, alertName, |
| 802 | alertName); |
| 803 | res |= runIpxtablesCmd(alertQuotaCmd, IptRejectNoAdd); |
| 804 | free(alertQuotaCmd); |
| 805 | free(chainNameAndPos); |
| 806 | } |
| 807 | *alertBytes = bytes; |
| 808 | free(alertName); |
| 809 | return res; |
| 810 | } |
| 811 | |
| 812 | int BandwidthController::removeCostlyAlert(const char *costName, int64_t *alertBytes) { |
| 813 | char *alertQuotaCmd; |
| 814 | char *chainName; |
| 815 | char *alertName; |
| 816 | int res = 0; |
| 817 | |
| 818 | asprintf(&alertName, "%sAlert", costName); |
| 819 | if (!*alertBytes) { |
| 820 | LOGE("No prior alert set for %s alert", costName); |
| 821 | return -1; |
| 822 | } |
| 823 | |
| 824 | asprintf(&chainName, "costly_%s", costName); |
| 825 | asprintf(&alertQuotaCmd, ALERT_IPT_TEMPLATE, "-D", chainName, *alertBytes, alertName, alertName); |
| 826 | res |= runIpxtablesCmd(alertQuotaCmd, IptRejectNoAdd); |
| 827 | free(alertQuotaCmd); |
| 828 | free(chainName); |
| 829 | |
| 830 | *alertBytes = 0; |
| 831 | free(alertName); |
| 832 | return res; |
| 833 | } |
JP Abgrall | db7da58 | 2011-09-18 12:57:32 -0700 | [diff] [blame^] | 834 | |
| 835 | /* |
| 836 | * Parse the ptks and bytes out of: |
| 837 | * Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) |
| 838 | * pkts bytes target prot opt in out source destination |
| 839 | * 0 0 ACCEPT all -- rmnet0 wlan0 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED |
| 840 | * 0 0 DROP all -- wlan0 rmnet0 0.0.0.0/0 0.0.0.0/0 state INVALID |
| 841 | * 0 0 ACCEPT all -- wlan0 rmnet0 0.0.0.0/0 0.0.0.0/0 |
| 842 | * |
| 843 | */ |
| 844 | int BandwidthController::parseForwardChainStats(TetherStats &stats, FILE *fp) { |
| 845 | int res; |
| 846 | char lineBuffer[MAX_IPT_OUTPUT_LINE_LEN]; |
| 847 | char iface0[MAX_IPT_OUTPUT_LINE_LEN]; |
| 848 | char iface1[MAX_IPT_OUTPUT_LINE_LEN]; |
| 849 | char rest[MAX_IPT_OUTPUT_LINE_LEN]; |
| 850 | |
| 851 | char *buffPtr; |
| 852 | int64_t packets, bytes; |
| 853 | |
| 854 | while (NULL != (buffPtr = fgets(lineBuffer, MAX_IPT_OUTPUT_LINE_LEN, fp))) { |
| 855 | /* Clean up, so a failed parse can still print info */ |
| 856 | iface0[0] = iface1[0] = rest[0] = packets = bytes = 0; |
| 857 | res = sscanf(buffPtr, "%lld %lld ACCEPT all -- %s %s 0.%s", |
| 858 | &packets, &bytes, iface0, iface1, rest); |
| 859 | LOGV("parse res=%d iface0=<%s> iface1=<%s> pkts=%lld bytes=%lld rest=<%s> orig line=<%s>", res, |
| 860 | iface0, iface1, packets, bytes, rest, buffPtr); |
| 861 | if (res != 5) { |
| 862 | continue; |
| 863 | } |
| 864 | if ((stats.ifaceIn == iface0) && (stats.ifaceOut == iface1)) { |
| 865 | LOGV("iface_in=%s iface_out=%s rx_bytes=%lld rx_packets=%lld ", iface0, iface1, bytes, packets); |
| 866 | stats.rxPackets = packets; |
| 867 | stats.rxBytes = bytes; |
| 868 | } else if ((stats.ifaceOut == iface0) && (stats.ifaceIn == iface1)) { |
| 869 | LOGV("iface_in=%s iface_out=%s tx_bytes=%lld tx_packets=%lld ", iface1, iface0, bytes, packets); |
| 870 | stats.txPackets = packets; |
| 871 | stats.txBytes = bytes; |
| 872 | } |
| 873 | } |
| 874 | /* Failure if rx or tx was not found */ |
| 875 | return (stats.rxBytes == -1 || stats.txBytes == -1) ? -1 : 0; |
| 876 | } |
| 877 | |
| 878 | |
| 879 | char *BandwidthController::TetherStats::getStatsLine(void) { |
| 880 | char *msg; |
| 881 | asprintf(&msg, "%s %s %lld %lld %lld %lld", ifaceIn.c_str(), ifaceOut.c_str(), |
| 882 | rxBytes, rxPackets, txBytes, txPackets); |
| 883 | return msg; |
| 884 | } |
| 885 | |
| 886 | int BandwidthController::getTetherStats(TetherStats &stats) { |
| 887 | int res; |
| 888 | std::string fullCmd; |
| 889 | FILE *iptOutput; |
| 890 | const char *cmd; |
| 891 | |
| 892 | if (stats.rxBytes != -1 || stats.txBytes != -1) { |
| 893 | LOGE("Unexpected input stats. Byte counts should be -1."); |
| 894 | return -1; |
| 895 | } |
| 896 | |
| 897 | /* |
| 898 | * Why not use some kind of lib to talk to iptables? |
| 899 | * Because the only libs are libiptc and libip6tc in iptables, and they are |
| 900 | * not easy to use. They require the known iptables match modules to be |
| 901 | * preloaded/linked, and require apparently a lot of wrapper code to get |
| 902 | * the wanted info. |
| 903 | */ |
| 904 | fullCmd = IPTABLES_PATH; |
| 905 | fullCmd += " -nvx -L FORWARD"; |
| 906 | iptOutput = popen(fullCmd.c_str(), "r"); |
| 907 | if (!iptOutput) { |
| 908 | LOGE("Failed to run %s err=%s", fullCmd.c_str(), strerror(errno)); |
| 909 | return -1; |
| 910 | } |
| 911 | res = parseForwardChainStats(stats, iptOutput); |
| 912 | pclose(iptOutput); |
| 913 | |
| 914 | /* Currently NatController doesn't do ipv6 tethering, so we are done. */ |
| 915 | return res; |
| 916 | } |