/*
* Copyright (C) 2019 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.
*/
#include "NdcDispatcher.h"
#include <arpa/inet.h>
#include <dirent.h>
#include <errno.h>
#include <linux/if.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <cinttypes>
#include <string>
#include <vector>
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android/multinetwork.h>
#include <netdutils/ResponseCode.h>
#include <netdutils/Status.h>
#include <netdutils/StatusOr.h>
#include <netutils/ifc.h>
#include "NetdConstants.h"
#include "NetworkController.h"
#include "Permission.h"
#include "UidRanges.h"
#include "netid_client.h"
using android::base::Join;
using android::base::StringPrintf;
using android::binder::Status;
#define PARSE_INT_RETURN_IF_FAIL(cli, label, intLabel, errMsg, addErrno) \
do { \
if (!android::base::ParseInt(label, &intLabel)) { \
errno = EINVAL; \
cli->sendMsg(ResponseCode::OperationFailed, errMsg, addErrno); \
return 0; \
} \
} while (0)
#define PARSE_UINT_RETURN_IF_FAIL(cli, label, intLabel, errMsg, addErrno) \
do { \
if (!android::base::ParseUint(label, &intLabel)) { \
errno = EINVAL; \
cli->sendMsg(ResponseCode::OperationFailed, errMsg, addErrno); \
return 0; \
} \
} while (0)
namespace android {
using netdutils::ResponseCode;
namespace net {
namespace {
const unsigned NUM_OEM_IDS = NetworkController::MAX_OEM_ID - NetworkController::MIN_OEM_ID + 1;
unsigned stringToNetId(const char* arg) {
if (!strcmp(arg, "local")) {
return NetworkController::LOCAL_NET_ID;
}
// OEM NetIds are "oem1", "oem2", .., "oem50".
if (!strncmp(arg, "oem", 3)) {
unsigned n = strtoul(arg + 3, nullptr, 0);
if (1 <= n && n <= NUM_OEM_IDS) {
return NetworkController::MIN_OEM_ID + n;
}
return NETID_UNSET;
} else if (!strncmp(arg, "handle", 6)) {
unsigned n = netHandleToNetId((net_handle_t)strtoull(arg + 6, nullptr, 10));
if (NetworkController::MIN_OEM_ID <= n && n <= NetworkController::MAX_OEM_ID) {
return n;
}
return NETID_UNSET;
}
// strtoul() returns 0 on errors, which is fine because 0 is an invalid netId.
return strtoul(arg, nullptr, 0);
}
std::string toStdString(const String16& s) {
return std::string(String8(s.string()));
}
int stringToINetdPermission(const char* arg) {
if (!strcmp(arg, "NETWORK")) {
return INetd::PERMISSION_NETWORK;
}
if (!strcmp(arg, "SYSTEM")) {
return INetd::PERMISSION_SYSTEM;
}
return INetd::PERMISSION_NONE;
}
} // namespace
sp<INetd> NdcDispatcher::mNetd;
sp<IDnsResolver> NdcDispatcher::mDnsResolver;
NdcDispatcher::NdcDispatcher() {
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> binderNetd = sm->getService(String16("netd"));
sp<IBinder> binderDnsResolver = sm->getService(String16("dnsresolver"));
if ((binderNetd != nullptr) && (binderDnsResolver != nullptr)) {
NdcDispatcher::mNetd = interface_cast<INetd>(binderNetd);
NdcDispatcher::mDnsResolver = interface_cast<IDnsResolver>(binderDnsResolver);
} else {
LOG(LOGLEVEL) << "Unable to get binder service";
exit(1);
}
registerCmd(new InterfaceCmd());
registerCmd(new IpFwdCmd());
registerCmd(new TetherCmd());
registerCmd(new NatCmd());
registerCmd(new BandwidthControlCmd());
registerCmd(new IdletimerControlCmd());
registerCmd(new FirewallCmd());
registerCmd(new ClatdCmd());
registerCmd(new NetworkCommand());
registerCmd(new StrictCmd());
}
void NdcDispatcher::registerCmd(NdcNetdCommand* cmd) {
mCommands.push_back(cmd);
}
int NdcDispatcher::dispatchCommand(int argc, char** argv) {
if (argc >= CMD_ARGS_MAX) {
mNdc.sendMsg(500, "Command too long", false);
}
for (const auto* c : mCommands) {
if (c->getCommand() == argv[0]) {
if (c->runCommand(&mNdc, argc, argv)) {
mNdc.sendMsg(500, "Handler error", true);
}
return 0;
}
}
mNdc.sendMsg(500, "Command not recognized", false);
return 0;
}
NdcDispatcher::InterfaceCmd::InterfaceCmd() : NdcNetdCommand("interface") {}
int NdcDispatcher::InterfaceCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
if (argc < 2) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
if (!strcmp(argv[1], "list")) {
std::vector<std::string> interfaceGetList;
Status status = mNetd->interfaceGetList(&interfaceGetList);
if (!status.isOk()) {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Failed to get interface list", true);
return 0;
}
for (const auto& iface : interfaceGetList) {
cli->sendMsg(ResponseCode::InterfaceListResult, iface.c_str(), false);
}
cli->sendMsg(ResponseCode::CommandOkay, "Interface list completed", false);
return 0;
} else {
/*
* These commands take a minimum of 3 arguments
*/
if (argc < 3) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
if (!strcmp(argv[1], "getcfg")) {
InterfaceConfigurationParcel interfaceCfgResult;
Status status = mNetd->interfaceGetCfg(std::string(argv[2]), &interfaceCfgResult);
if (!status.isOk()) {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Interface not found", true);
return 0;
}
std::string flags = Join(interfaceCfgResult.flags, " ");
std::string msg = StringPrintf("%s %s %d %s", interfaceCfgResult.hwAddr.c_str(),
interfaceCfgResult.ipv4Addr.c_str(),
interfaceCfgResult.prefixLength, flags.c_str());
cli->sendMsg(ResponseCode::InterfaceGetCfgResult, msg.c_str(), false);
return 0;
} else if (!strcmp(argv[1], "setcfg")) {
// arglist: iface [addr prefixLength] flags
if (argc < 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
LOG(LOGLEVEL) << "Setting iface cfg";
struct in_addr addr;
int index = 5;
InterfaceConfigurationParcel interfaceCfg;
interfaceCfg.ifName = argv[2];
interfaceCfg.hwAddr = "";
if (!inet_aton(argv[3], &addr)) {
// Handle flags only case
index = 3;
interfaceCfg.ipv4Addr = "";
interfaceCfg.prefixLength = 0;
} else {
if (addr.s_addr != 0) {
interfaceCfg.ipv4Addr = argv[3];
PARSE_INT_RETURN_IF_FAIL(cli, argv[4], interfaceCfg.prefixLength,
"Failed to set address", true);
Status status = mNetd->interfaceSetCfg(interfaceCfg);
if (!status.isOk()) {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Failed to set address", true);
return 0;
}
}
}
/* Process flags */
for (int i = index; i < argc; i++) {
char* flag = argv[i];
if (!strcmp(flag, "up")) {
LOG(LOGLEVEL) << "Trying to bring up " << argv[2];
interfaceCfg.flags.push_back(toStdString(INetd::IF_STATE_UP()));
Status status = mNetd->interfaceSetCfg(interfaceCfg);
if (!status.isOk()) {
LOG(LOGLEVEL) << "Error upping interface";
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Failed to up interface", true);
ifc_close();
return 0;
}
} else if (!strcmp(flag, "down")) {
LOG(LOGLEVEL) << "Trying to bring down " << argv[2];
interfaceCfg.flags.push_back(toStdString(INetd::IF_STATE_DOWN()));
Status status = mNetd->interfaceSetCfg(interfaceCfg);
if (!status.isOk()) {
LOG(LOGLEVEL) << "Error downing interface";
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Failed to down interface",
true);
return 0;
}
} else if (!strcmp(flag, "broadcast")) {
// currently ignored
} else if (!strcmp(flag, "multicast")) {
// currently ignored
} else if (!strcmp(flag, "running")) {
// currently ignored
} else if (!strcmp(flag, "loopback")) {
// currently ignored
} else if (!strcmp(flag, "point-to-point")) {
// currently ignored
} else {
cli->sendMsg(ResponseCode::CommandParameterError, "Flag unsupported", false);
return 0;
}
}
cli->sendMsg(ResponseCode::CommandOkay, "Interface configuration set", false);
return 0;
} else if (!strcmp(argv[1], "clearaddrs")) {
// arglist: iface
LOG(LOGLEVEL) << "Clearing all IP addresses on " << argv[2];
mNetd->interfaceClearAddrs(std::string(argv[2]));
cli->sendMsg(ResponseCode::CommandOkay, "Interface IP addresses cleared", false);
return 0;
} else if (!strcmp(argv[1], "ipv6privacyextensions")) {
if (argc != 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: interface ipv6privacyextensions <interface> <enable|disable>",
false);
return 0;
}
int enable = !strncmp(argv[3], "enable", 7);
Status status = mNetd->interfaceSetIPv6PrivacyExtensions(std::string(argv[2]), enable);
if (status.isOk()) {
cli->sendMsg(ResponseCode::CommandOkay, "IPv6 privacy extensions changed", false);
} else {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Failed to set ipv6 privacy extensions",
true);
}
return 0;
} else if (!strcmp(argv[1], "ipv6")) {
if (argc != 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: interface ipv6 <interface> <enable|disable>", false);
return 0;
}
int enable = !strncmp(argv[3], "enable", 7);
Status status = mNetd->interfaceSetEnableIPv6(std::string(argv[2]), enable);
if (status.isOk()) {
cli->sendMsg(ResponseCode::CommandOkay, "IPv6 state changed", false);
} else {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Failed to change IPv6 state", true);
}
return 0;
} else if (!strcmp(argv[1], "setmtu")) {
if (argc != 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: interface setmtu <interface> <val>", false);
return 0;
}
int mtuValue = 0;
PARSE_INT_RETURN_IF_FAIL(cli, argv[3], mtuValue, "Failed to set MTU", true);
Status status = mNetd->interfaceSetMtu(std::string(argv[2]), mtuValue);
if (status.isOk()) {
cli->sendMsg(ResponseCode::CommandOkay, "MTU changed", false);
} else {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Failed to set MTU", true);
}
return 0;
} else {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown interface cmd", false);
return 0;
}
}
return 0;
}
NdcDispatcher::IpFwdCmd::IpFwdCmd() : NdcNetdCommand("ipfwd") {}
int NdcDispatcher::IpFwdCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
bool matched = false;
Status status;
if (argc == 2) {
// 0 1
// ipfwd status
if (!strcmp(argv[1], "status")) {
bool ipfwdEnabled;
mNetd->ipfwdEnabled(&ipfwdEnabled);
std::string msg = StringPrintf("Forwarding %s", ipfwdEnabled ? "enabled" : "disabled");
cli->sendMsg(ResponseCode::IpFwdStatusResult, msg.c_str(), false);
return 0;
}
} else if (argc == 3) {
// 0 1 2
// ipfwd enable <requester>
// ipfwd disable <requester>
if (!strcmp(argv[1], "enable")) {
matched = true;
status = mNetd->ipfwdEnableForwarding(argv[2]);
} else if (!strcmp(argv[1], "disable")) {
matched = true;
status = mNetd->ipfwdDisableForwarding(argv[2]);
}
} else if (argc == 4) {
// 0 1 2 3
// ipfwd add wlan0 dummy0
// ipfwd remove wlan0 dummy0
if (!strcmp(argv[1], "add")) {
matched = true;
status = mNetd->ipfwdAddInterfaceForward(argv[2], argv[3]);
} else if (!strcmp(argv[1], "remove")) {
matched = true;
status = mNetd->ipfwdRemoveInterfaceForward(argv[2], argv[3]);
}
}
if (!matched) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown ipfwd cmd", false);
return 0;
}
if (status.isOk()) {
cli->sendMsg(ResponseCode::CommandOkay, "ipfwd operation succeeded", false);
} else {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "ipfwd operation failed", true);
}
return 0;
}
NdcDispatcher::TetherCmd::TetherCmd() : NdcNetdCommand("tether") {}
int NdcDispatcher::TetherCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
Status status;
if (argc < 2) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
if (!strcmp(argv[1], "stop")) {
status = mNetd->tetherStop();
} else if (!strcmp(argv[1], "status")) {
bool tetherEnabled;
mNetd->tetherIsEnabled(&tetherEnabled);
std::string msg =
StringPrintf("Tethering services %s", tetherEnabled ? "started" : "stopped");
cli->sendMsg(ResponseCode::TetherStatusResult, msg.c_str(), false);
return 0;
} else if (argc == 3) {
if (!strcmp(argv[1], "interface") && !strcmp(argv[2], "list")) {
std::vector<std::string> ifList;
mNetd->tetherInterfaceList(&ifList);
for (const auto& ifname : ifList) {
cli->sendMsg(ResponseCode::TetherInterfaceListResult, ifname.c_str(), false);
}
}
} else if (!strcmp(argv[1], "start")) {
if (argc % 2 == 1) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Bad number of arguments", false);
return 0;
}
std::vector<std::string> dhcpRanges;
// We do the checking of the pairs & addr invalidation in binderService/tetherController.
for (int arg_index = 2; arg_index < argc; arg_index++) {
dhcpRanges.push_back(argv[arg_index]);
}
status = mNetd->tetherStart(dhcpRanges);
} else {
/*
* These commands take a minimum of 4 arguments
*/
if (argc < 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
if (!strcmp(argv[1], "interface")) {
if (!strcmp(argv[2], "add")) {
status = mNetd->tetherInterfaceAdd(argv[3]);
} else if (!strcmp(argv[2], "remove")) {
status = mNetd->tetherInterfaceRemove(argv[3]);
/* else if (!strcmp(argv[2], "list")) handled above */
} else {
cli->sendMsg(ResponseCode::CommandParameterError,
"Unknown tether interface operation", false);
return 0;
}
} else if (!strcmp(argv[1], "dns")) {
if (!strcmp(argv[2], "set")) {
if (argc < 5) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
std::vector<std::string> tetherDnsAddrs;
unsigned netId = stringToNetId(argv[3]);
for (int arg_index = 4; arg_index < argc; arg_index++) {
tetherDnsAddrs.push_back(argv[arg_index]);
}
status = mNetd->tetherDnsSet(netId, tetherDnsAddrs);
/* else if (!strcmp(argv[2], "list")) handled above */
} else {
cli->sendMsg(ResponseCode::CommandParameterError,
"Unknown tether interface operation", false);
return 0;
}
} else {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown tether cmd", false);
return 0;
}
}
if (status.isOk()) {
cli->sendMsg(ResponseCode::CommandOkay, "Tether operation succeeded", false);
} else {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Tether operation failed", true);
}
return 0;
}
NdcDispatcher::NatCmd::NatCmd() : NdcNetdCommand("nat") {}
int NdcDispatcher::NatCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
Status status;
if (argc < 5) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
// 0 1 2 3
// nat enable intiface extiface
// nat disable intiface extiface
if (!strcmp(argv[1], "enable") && argc >= 4) {
status = mNetd->tetherAddForward(argv[2], argv[3]);
} else if (!strcmp(argv[1], "disable") && argc >= 4) {
status = mNetd->tetherRemoveForward(argv[2], argv[3]);
} else {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown nat cmd", false);
return 0;
}
if (status.isOk()) {
cli->sendMsg(ResponseCode::CommandOkay, "Nat operation succeeded", false);
} else {
errno = status.serviceSpecificErrorCode();
cli->sendMsg(ResponseCode::OperationFailed, "Nat operation failed", true);
}
return 0;
}
NdcDispatcher::BandwidthControlCmd::BandwidthControlCmd() : NdcNetdCommand("bandwidth") {}
void NdcDispatcher::BandwidthControlCmd::sendGenericSyntaxError(NdcClient* cli,
const char* usageMsg) const {
char* msg;
asprintf(&msg, "Usage: bandwidth %s", usageMsg);
cli->sendMsg(ResponseCode::CommandSyntaxError, msg, false);
free(msg);
}
void NdcDispatcher::BandwidthControlCmd::sendGenericOkFail(NdcClient* cli, int cond) const {
if (!cond) {
cli->sendMsg(ResponseCode::CommandOkay, "Bandwidth command succeeeded", false);
} else {
cli->sendMsg(ResponseCode::OperationFailed, "Bandwidth command failed", false);
}
}
void NdcDispatcher::BandwidthControlCmd::sendGenericOpFailed(NdcClient* cli,
const char* errMsg) const {
cli->sendMsg(ResponseCode::OperationFailed, errMsg, false);
}
int NdcDispatcher::BandwidthControlCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
if (argc < 2) {
sendGenericSyntaxError(cli, "<cmds> <args...>");
return 0;
}
LOG(LOGLEVEL) << StringPrintf("bwctrlcmd: argc=%d %s %s ...", argc, argv[0], argv[1]).c_str();
if (!strcmp(argv[1], "removeiquota") || !strcmp(argv[1], "riq")) {
if (argc != 3) {
sendGenericSyntaxError(cli, "removeiquota <interface>");
return 0;
}
int rc = !mNetd->bandwidthRemoveInterfaceQuota(argv[2]).isOk();
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "setiquota") || !strcmp(argv[1], "siq")) {
if (argc != 4) {
sendGenericSyntaxError(cli, "setiquota <interface> <bytes>");
return 0;
}
int64_t bytes = 0;
PARSE_INT_RETURN_IF_FAIL(cli, argv[3], bytes, "Bandwidth command failed", false);
int rc = !mNetd->bandwidthSetInterfaceQuota(argv[2], bytes).isOk();
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "addnaughtyapps") || !strcmp(argv[1], "ana")) {
if (argc < 3) {
sendGenericSyntaxError(cli, "addnaughtyapps <appUid> ...");
return 0;
}
int rc = 0;
for (int arg_index = 2; arg_index < argc; arg_index++) {
uid_t uid = 0;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[arg_index], uid, "Bandwidth command failed", false);
rc = !mNetd->bandwidthAddNaughtyApp(uid).isOk();
if (rc) break;
}
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "removenaughtyapps") || !strcmp(argv[1], "rna")) {
if (argc < 3) {
sendGenericSyntaxError(cli, "removenaughtyapps <appUid> ...");
return 0;
}
int rc = 0;
for (int arg_index = 2; arg_index < argc; arg_index++) {
uid_t uid = 0;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[arg_index], uid, "Bandwidth command failed", false);
rc = !mNetd->bandwidthRemoveNaughtyApp(uid).isOk();
if (rc) break;
}
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "addniceapps") || !strcmp(argv[1], "aha")) {
if (argc < 3) {
sendGenericSyntaxError(cli, "addniceapps <appUid> ...");
return 0;
}
int rc = 0;
for (int arg_index = 2; arg_index < argc; arg_index++) {
uid_t uid = 0;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[arg_index], uid, "Bandwidth command failed", false);
rc = !mNetd->bandwidthAddNiceApp(uid).isOk();
if (rc) break;
}
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "removeniceapps") || !strcmp(argv[1], "rha")) {
if (argc < 3) {
sendGenericSyntaxError(cli, "removeniceapps <appUid> ...");
return 0;
}
int rc = 0;
for (int arg_index = 2; arg_index < argc; arg_index++) {
uid_t uid = 0;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[arg_index], uid, "Bandwidth command failed", false);
rc = !mNetd->bandwidthRemoveNiceApp(uid).isOk();
if (rc) break;
}
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "setglobalalert") || !strcmp(argv[1], "sga")) {
if (argc != 3) {
sendGenericSyntaxError(cli, "setglobalalert <bytes>");
return 0;
}
int64_t bytes = 0;
PARSE_INT_RETURN_IF_FAIL(cli, argv[2], bytes, "Bandwidth command failed", false);
int rc = !mNetd->bandwidthSetGlobalAlert(bytes).isOk();
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "setinterfacealert") || !strcmp(argv[1], "sia")) {
if (argc != 4) {
sendGenericSyntaxError(cli, "setinterfacealert <interface> <bytes>");
return 0;
}
int64_t bytes = 0;
PARSE_INT_RETURN_IF_FAIL(cli, argv[3], bytes, "Bandwidth command failed", false);
int rc = !mNetd->bandwidthSetInterfaceAlert(argv[2], bytes).isOk();
sendGenericOkFail(cli, rc);
return 0;
}
if (!strcmp(argv[1], "removeinterfacealert") || !strcmp(argv[1], "ria")) {
if (argc != 3) {
sendGenericSyntaxError(cli, "removeinterfacealert <interface>");
return 0;
}
int rc = !mNetd->bandwidthRemoveInterfaceAlert(argv[2]).isOk();
sendGenericOkFail(cli, rc);
return 0;
}
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown bandwidth cmd", false);
return 0;
}
NdcDispatcher::IdletimerControlCmd::IdletimerControlCmd() : NdcNetdCommand("idletimer") {}
int NdcDispatcher::IdletimerControlCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
// TODO(ashish): Change the error statements
if (argc < 2) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
LOG(LOGLEVEL)
<< StringPrintf("idletimerctrlcmd: argc=%d %s %s ...", argc, argv[0], argv[1]).c_str();
if (!strcmp(argv[1], "add")) {
if (argc != 5) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
int timeout = 0;
PARSE_INT_RETURN_IF_FAIL(cli, argv[3], timeout, "Failed to add interface", false);
Status status = mNetd->idletimerAddInterface(argv[2], timeout, argv[4]);
if (!status.isOk()) {
cli->sendMsg(ResponseCode::OperationFailed, "Failed to add interface", false);
} else {
cli->sendMsg(ResponseCode::CommandOkay, "Add success", false);
}
return 0;
}
if (!strcmp(argv[1], "remove")) {
if (argc != 5) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
int timeout = 0;
PARSE_INT_RETURN_IF_FAIL(cli, argv[3], timeout, "Failed to remove interface", false);
Status status = mNetd->idletimerRemoveInterface(argv[2], timeout, argv[4]);
if (!status.isOk()) {
cli->sendMsg(ResponseCode::OperationFailed, "Failed to remove interface", false);
} else {
cli->sendMsg(ResponseCode::CommandOkay, "Remove success", false);
}
return 0;
}
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown idletimer cmd", false);
return 0;
}
NdcDispatcher::FirewallCmd::FirewallCmd() : NdcNetdCommand("firewall") {}
int NdcDispatcher::FirewallCmd::sendGenericOkFail(NdcClient* cli, int cond) const {
if (!cond) {
cli->sendMsg(ResponseCode::CommandOkay, "Firewall command succeeded", false);
} else {
cli->sendMsg(ResponseCode::OperationFailed, "Firewall command failed", false);
}
return 0;
}
int NdcDispatcher::FirewallCmd::parseRule(const char* arg) {
if (!strcmp(arg, "allow")) {
return INetd::FIREWALL_RULE_ALLOW;
} else if (!strcmp(arg, "deny")) {
return INetd::FIREWALL_RULE_DENY;
} else {
LOG(LOGLEVEL) << "failed to parse uid rule " << arg;
return INetd::FIREWALL_RULE_ALLOW;
}
}
int NdcDispatcher::FirewallCmd::parseFirewallType(const char* arg) {
if (!strcmp(arg, "whitelist")) {
return INetd::FIREWALL_WHITELIST;
} else if (!strcmp(arg, "blacklist")) {
return INetd::FIREWALL_BLACKLIST;
} else {
LOG(LOGLEVEL) << "failed to parse firewall type " << arg;
return INetd::FIREWALL_BLACKLIST;
}
}
int NdcDispatcher::FirewallCmd::parseChildChain(const char* arg) {
if (!strcmp(arg, "dozable")) {
return INetd::FIREWALL_CHAIN_DOZABLE;
} else if (!strcmp(arg, "standby")) {
return INetd::FIREWALL_CHAIN_STANDBY;
} else if (!strcmp(arg, "powersave")) {
return INetd::FIREWALL_CHAIN_POWERSAVE;
} else if (!strcmp(arg, "none")) {
return INetd::FIREWALL_CHAIN_NONE;
} else {
LOG(LOGLEVEL) << "failed to parse child firewall chain " << arg;
return -1;
}
}
int NdcDispatcher::FirewallCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
if (argc < 2) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing command", false);
return 0;
}
if (!strcmp(argv[1], "enable")) {
if (argc != 3) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: firewall enable <whitelist|blacklist>", false);
return 0;
}
int res = !mNetd->firewallSetFirewallType(parseFirewallType(argv[2])).isOk();
return sendGenericOkFail(cli, res);
}
if (!strcmp(argv[1], "set_interface_rule")) {
if (argc != 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: firewall set_interface_rule <rmnet0> <allow|deny>", false);
return 0;
}
int res = !mNetd->firewallSetInterfaceRule(argv[2], parseRule(argv[3])).isOk();
return sendGenericOkFail(cli, res);
}
if (!strcmp(argv[1], "set_uid_rule")) {
if (argc != 5) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: firewall set_uid_rule <dozable|standby|none> <1000> <allow|deny>",
false);
return 0;
}
int childChain = parseChildChain(argv[2]);
if (childChain == -1) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Invalid chain name. Valid names are: <dozable|standby|none>", false);
return 0;
}
uid_t uid = 0;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[3], uid, "Firewall command failed", false);
int res = !mNetd->firewallSetUidRule(childChain, uid, parseRule(argv[4])).isOk();
return sendGenericOkFail(cli, res);
}
if (!strcmp(argv[1], "enable_chain")) {
if (argc != 3) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: firewall enable_chain <dozable|standby>", false);
return 0;
}
int res = !mNetd->firewallEnableChildChain(parseChildChain(argv[2]), true).isOk();
return sendGenericOkFail(cli, res);
}
if (!strcmp(argv[1], "disable_chain")) {
if (argc != 3) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: firewall disable_chain <dozable|standby>", false);
return 0;
}
int res = !mNetd->firewallEnableChildChain(parseChildChain(argv[2]), false).isOk();
return sendGenericOkFail(cli, res);
}
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown command", false);
return 0;
}
NdcDispatcher::ClatdCmd::ClatdCmd() : NdcNetdCommand("clatd") {}
int NdcDispatcher::ClatdCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
int rc = 0;
if (argc < 3) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
std::string v6Addr;
if (!strcmp(argv[1], "stop")) {
rc = !mNetd->clatdStop(argv[2]).isOk();
} else if (!strcmp(argv[1], "start")) {
if (argc < 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing argument", false);
return 0;
}
rc = !mNetd->clatdStart(argv[2], argv[3], &v6Addr).isOk();
} else {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown clatd cmd", false);
return 0;
}
if (!rc) {
cli->sendMsg(ResponseCode::CommandOkay,
std::string(("Clatd operation succeeded ") + v6Addr).c_str(), false);
} else {
cli->sendMsg(ResponseCode::OperationFailed, "Clatd operation failed", false);
}
return 0;
}
NdcDispatcher::StrictCmd::StrictCmd() : NdcNetdCommand("strict") {}
int NdcDispatcher::StrictCmd::sendGenericOkFail(NdcClient* cli, int cond) const {
if (!cond) {
cli->sendMsg(ResponseCode::CommandOkay, "Strict command succeeded", false);
} else {
cli->sendMsg(ResponseCode::OperationFailed, "Strict command failed", false);
}
return 0;
}
int NdcDispatcher::StrictCmd::parsePenalty(const char* arg) {
if (!strcmp(arg, "reject")) {
return INetd::PENALTY_POLICY_REJECT;
} else if (!strcmp(arg, "log")) {
return INetd::PENALTY_POLICY_LOG;
} else if (!strcmp(arg, "accept")) {
return INetd::PENALTY_POLICY_ACCEPT;
} else {
return -1;
}
}
int NdcDispatcher::StrictCmd::runCommand(NdcClient* cli, int argc, char** argv) const {
if (argc < 2) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Missing command", false);
return 0;
}
if (!strcmp(argv[1], "set_uid_cleartext_policy")) {
if (argc != 4) {
cli->sendMsg(ResponseCode::CommandSyntaxError,
"Usage: strict set_uid_cleartext_policy <uid> <accept|log|reject>", false);
return 0;
}
errno = 0;
uid_t uid = 0;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[2], uid, "Invalid UID", false);
if (uid > UID_MAX) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Invalid UID", false);
return 0;
}
int penalty = parsePenalty(argv[3]);
if (penalty == -1) {
cli->sendMsg(ResponseCode::CommandSyntaxError, "Invalid penalty argument", false);
return 0;
}
int res = !mNetd->strictUidCleartextPenalty(uid, penalty).isOk();
return sendGenericOkFail(cli, res);
}
cli->sendMsg(ResponseCode::CommandSyntaxError, "Unknown command", false);
return 0;
}
NdcDispatcher::NetworkCommand::NetworkCommand() : NdcNetdCommand("network") {}
int NdcDispatcher::NetworkCommand::syntaxError(NdcClient* cli, const char* message) const {
cli->sendMsg(ResponseCode::CommandSyntaxError, message, false);
return 0;
}
int NdcDispatcher::NetworkCommand::operationError(NdcClient* cli, const char* message,
int ret) const {
errno = ret;
cli->sendMsg(ResponseCode::OperationFailed, message, true);
return 0;
}
int NdcDispatcher::NetworkCommand::success(NdcClient* cli) const {
cli->sendMsg(ResponseCode::CommandOkay, "success", false);
return 0;
}
int NdcDispatcher::NetworkCommand::runCommand(NdcClient* cli, int argc, char** argv) const {
if (argc < 2) {
return syntaxError(cli, "Missing argument");
}
// 0 1 2 3 4 5 6 7 8
// network route [legacy <uid>] add <netId> <interface> <destination> [nexthop]
// network route [legacy <uid>] remove <netId> <interface> <destination> [nexthop]
//
// nexthop may be either an IPv4/IPv6 address or one of "unreachable" or "throw".
if (!strcmp(argv[1], "route")) {
if (argc < 6 || argc > 9) {
return syntaxError(cli, "Incorrect number of arguments");
}
int nextArg = 2;
bool legacy = false;
uid_t uid = 0;
if (!strcmp(argv[nextArg], "legacy")) {
++nextArg;
legacy = true;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[nextArg++], uid, "Unknown argument", false);
}
bool add = false;
if (!strcmp(argv[nextArg], "add")) {
add = true;
} else if (strcmp(argv[nextArg], "remove")) {
return syntaxError(cli, "Unknown argument");
}
++nextArg;
if (argc < nextArg + 3 || argc > nextArg + 4) {
return syntaxError(cli, "Incorrect number of arguments");
}
unsigned netId = stringToNetId(argv[nextArg++]);
const char* interface = argv[nextArg++];
const char* destination = argv[nextArg++];
const char* nexthop = argc > nextArg ? argv[nextArg] : "";
Status status;
if (legacy) {
status = add ? mNetd->networkAddLegacyRoute(netId, interface, destination, nexthop, uid)
: mNetd->networkRemoveLegacyRoute(netId, interface, destination, nexthop,
uid);
} else {
status = add ? mNetd->networkAddRoute(netId, interface, destination, nexthop)
: mNetd->networkRemoveRoute(netId, interface, destination, nexthop);
}
if (!status.isOk()) {
return operationError(cli, add ? "addRoute() failed" : "removeRoute() failed",
status.serviceSpecificErrorCode());
}
return success(cli);
}
// 0 1 2 3 4
// network interface add <netId> <interface>
// network interface remove <netId> <interface>
if (!strcmp(argv[1], "interface")) {
if (argc != 5) {
return syntaxError(cli, "Missing argument");
}
unsigned netId = stringToNetId(argv[3]);
if (!strcmp(argv[2], "add")) {
if (Status status = mNetd->networkAddInterface(netId, argv[4]); !status.isOk()) {
return operationError(cli, "addInterfaceToNetwork() failed",
status.serviceSpecificErrorCode());
}
} else if (!strcmp(argv[2], "remove")) {
if (Status status = mNetd->networkRemoveInterface(netId, argv[4]); !status.isOk()) {
return operationError(cli, "removeInterfaceFromNetwork() failed",
status.serviceSpecificErrorCode());
}
} else {
return syntaxError(cli, "Unknown argument");
}
return success(cli);
}
// 0 1 2 3
// network create <netId> [permission]
//
// 0 1 2 3 4
// network create <netId> vpn <secure>
if (!strcmp(argv[1], "create")) {
if (argc < 3) {
return syntaxError(cli, "Missing argument");
}
unsigned netId = stringToNetId(argv[2]);
if (argc == 6 && !strcmp(argv[3], "vpn")) {
bool secure = strtol(argv[4], nullptr, 2);
if (Status status = mNetd->networkCreateVpn(netId, secure); !status.isOk()) {
return operationError(cli, "createVirtualNetwork() failed",
status.serviceSpecificErrorCode());
}
} else if (argc > 4) {
return syntaxError(cli, "Unknown trailing argument(s)");
} else {
int permission = INetd::PERMISSION_NONE;
if (argc == 4) {
permission = stringToINetdPermission(argv[3]);
if (permission == INetd::PERMISSION_NONE) {
return syntaxError(cli, "Unknown permission");
}
}
if (Status status = mNetd->networkCreatePhysical(netId, permission); !status.isOk()) {
return operationError(cli, "createPhysicalNetwork() failed",
status.serviceSpecificErrorCode());
}
}
return success(cli);
}
// 0 1 2
// network destroy <netId>
if (!strcmp(argv[1], "destroy")) {
if (argc != 3) {
return syntaxError(cli, "Incorrect number of arguments");
}
unsigned netId = stringToNetId(argv[2]);
// Both of these functions manage their own locking internally.
if (Status status = mNetd->networkDestroy(netId); !status.isOk()) {
return operationError(cli, "destroyNetwork() failed",
status.serviceSpecificErrorCode());
}
mDnsResolver->destroyNetworkCache(netId);
return success(cli);
}
// 0 1 2 3
// network default set <netId>
// network default clear
if (!strcmp(argv[1], "default")) {
if (argc < 3) {
return syntaxError(cli, "Missing argument");
}
unsigned netId = NETID_UNSET;
if (!strcmp(argv[2], "set")) {
if (argc < 4) {
return syntaxError(cli, "Missing netId");
}
netId = stringToNetId(argv[3]);
} else if (strcmp(argv[2], "clear")) {
return syntaxError(cli, "Unknown argument");
}
if (Status status = mNetd->networkSetDefault(netId); !status.isOk()) {
return operationError(cli, "setDefaultNetwork() failed",
status.serviceSpecificErrorCode());
}
return success(cli);
}
// 0 1 2 3 4 5
// network permission user set <permission> <uid> ...
// network permission user clear <uid> ...
// network permission network set <permission> <netId> ...
// network permission network clear <netId> ...
if (!strcmp(argv[1], "permission")) {
if (argc < 5) {
return syntaxError(cli, "Missing argument");
}
int nextArg = 4;
int permission = INetd::PERMISSION_NONE;
if (!strcmp(argv[3], "set")) {
permission = stringToINetdPermission(argv[4]);
if (permission == INetd::PERMISSION_NONE) {
return syntaxError(cli, "Unknown permission");
}
nextArg = 5;
} else if (strcmp(argv[3], "clear")) {
return syntaxError(cli, "Unknown argument");
}
if (nextArg == argc) {
return syntaxError(cli, "Missing id");
}
bool userPermissions = !strcmp(argv[2], "user");
bool networkPermissions = !strcmp(argv[2], "network");
if (!userPermissions && !networkPermissions) {
return syntaxError(cli, "Unknown argument");
}
std::vector<int32_t> ids;
for (; nextArg < argc; ++nextArg) {
if (userPermissions) {
char* endPtr;
unsigned id = strtoul(argv[nextArg], &endPtr, 0);
if (!*argv[nextArg] || *endPtr) {
return syntaxError(cli, "Invalid id");
}
ids.push_back(id);
} else {
// networkPermissions
ids.push_back(stringToNetId(argv[nextArg]));
}
}
if (userPermissions) {
mNetd->networkSetPermissionForUser(permission, ids);
} else {
// networkPermissions
for (auto netId : ids) {
Status status = mNetd->networkSetPermissionForNetwork(netId, permission);
if (!status.isOk())
return operationError(cli, "setPermissionForNetworks() failed",
status.serviceSpecificErrorCode());
}
}
return success(cli);
}
// 0 1 2 3 4
// network users add <netId> [<uid>[-<uid>]] ...
// network users remove <netId> [<uid>[-<uid>]] ...
if (!strcmp(argv[1], "users")) {
if (argc < 4) {
return syntaxError(cli, "Missing argument");
}
unsigned netId = stringToNetId(argv[3]);
UidRanges uidRanges;
if (!uidRanges.parseFrom(argc - 4, argv + 4)) {
return syntaxError(cli, "Invalid UIDs");
}
if (!strcmp(argv[2], "add")) {
if (Status status = mNetd->networkAddUidRanges(netId, uidRanges.getRanges());
!status.isOk()) {
return operationError(cli, "addUsersToNetwork() failed",
status.serviceSpecificErrorCode());
}
} else if (!strcmp(argv[2], "remove")) {
if (Status status = mNetd->networkRemoveUidRanges(netId, uidRanges.getRanges());
!status.isOk()) {
return operationError(cli, "removeUsersFromNetwork() failed",
status.serviceSpecificErrorCode());
}
} else {
return syntaxError(cli, "Unknown argument");
}
return success(cli);
}
// 0 1 2 3
// network protect allow <uid> ...
// network protect deny <uid> ...
if (!strcmp(argv[1], "protect")) {
if (argc < 4) {
return syntaxError(cli, "Missing argument");
}
std::vector<uid_t> uids;
for (int i = 3; i < argc; ++i) {
uid_t uid = 0;
PARSE_UINT_RETURN_IF_FAIL(cli, argv[i], uid, "Unknown argument", false);
uids.push_back(uid);
}
if (!strcmp(argv[2], "allow")) {
for (auto uid : uids) {
mNetd->networkSetProtectAllow(uid);
}
} else if (!strcmp(argv[2], "deny")) {
for (auto uid : uids) {
mNetd->networkSetProtectDeny(uid);
}
} else {
return syntaxError(cli, "Unknown argument");
}
return success(cli);
}
return syntaxError(cli, "Unknown argument");
}
} // namespace net
} // namespace android