| /* |
| * Copyright 2022 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. |
| * |
| * TrafficControllerTest.cpp - unit tests for TrafficController.cpp |
| */ |
| |
| #include <cstdint> |
| #include <string> |
| #include <vector> |
| |
| #include <fcntl.h> |
| #include <inttypes.h> |
| #include <linux/inet_diag.h> |
| #include <linux/sock_diag.h> |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <gtest/gtest.h> |
| |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| #include <binder/Status.h> |
| |
| #include <netdutils/MockSyscalls.h> |
| |
| #define TEST_BPF_MAP |
| #include "TrafficController.h" |
| #include "bpf/BpfUtils.h" |
| #include "NetdUpdatablePublic.h" |
| |
| using namespace android::bpf; // NOLINT(google-build-using-namespace): grandfathered |
| |
| namespace android { |
| namespace net { |
| |
| using android::netdutils::Status; |
| using base::Result; |
| using netdutils::isOk; |
| |
| constexpr int TEST_MAP_SIZE = 10; |
| constexpr uid_t TEST_UID = 10086; |
| constexpr uid_t TEST_UID2 = 54321; |
| constexpr uid_t TEST_UID3 = 98765; |
| constexpr uint32_t TEST_TAG = 42; |
| constexpr uint32_t TEST_COUNTERSET = 1; |
| |
| #define ASSERT_VALID(x) ASSERT_TRUE((x).isValid()) |
| |
| class TrafficControllerTest : public ::testing::Test { |
| protected: |
| TrafficControllerTest() {} |
| TrafficController mTc; |
| BpfMap<uint64_t, UidTagValue> mFakeCookieTagMap; |
| BpfMap<uint32_t, StatsValue> mFakeAppUidStatsMap; |
| BpfMap<StatsKey, StatsValue> mFakeStatsMapA; |
| BpfMap<uint32_t, uint32_t> mFakeConfigurationMap; |
| BpfMap<uint32_t, UidOwnerValue> mFakeUidOwnerMap; |
| BpfMap<uint32_t, uint8_t> mFakeUidPermissionMap; |
| |
| void SetUp() { |
| std::lock_guard guard(mTc.mMutex); |
| ASSERT_EQ(0, setrlimitForTest()); |
| |
| mFakeCookieTagMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE); |
| ASSERT_VALID(mFakeCookieTagMap); |
| |
| mFakeAppUidStatsMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE); |
| ASSERT_VALID(mFakeAppUidStatsMap); |
| |
| mFakeStatsMapA.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE); |
| ASSERT_VALID(mFakeStatsMapA); |
| |
| mFakeConfigurationMap.resetMap(BPF_MAP_TYPE_ARRAY, CONFIGURATION_MAP_SIZE); |
| ASSERT_VALID(mFakeConfigurationMap); |
| |
| mFakeUidOwnerMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE); |
| ASSERT_VALID(mFakeUidOwnerMap); |
| mFakeUidPermissionMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE); |
| ASSERT_VALID(mFakeUidPermissionMap); |
| |
| mTc.mCookieTagMap = mFakeCookieTagMap; |
| ASSERT_VALID(mTc.mCookieTagMap); |
| mTc.mAppUidStatsMap = mFakeAppUidStatsMap; |
| ASSERT_VALID(mTc.mAppUidStatsMap); |
| mTc.mStatsMapA = mFakeStatsMapA; |
| ASSERT_VALID(mTc.mStatsMapA); |
| mTc.mConfigurationMap = mFakeConfigurationMap; |
| ASSERT_VALID(mTc.mConfigurationMap); |
| |
| // Always write to stats map A by default. |
| static_assert(SELECT_MAP_A == 0); |
| |
| mTc.mUidOwnerMap = mFakeUidOwnerMap; |
| ASSERT_VALID(mTc.mUidOwnerMap); |
| mTc.mUidPermissionMap = mFakeUidPermissionMap; |
| ASSERT_VALID(mTc.mUidPermissionMap); |
| mTc.mPrivilegedUser.clear(); |
| } |
| |
| void populateFakeStats(uint64_t cookie, uint32_t uid, uint32_t tag, StatsKey* key) { |
| UidTagValue cookieMapkey = {.uid = (uint32_t)uid, .tag = tag}; |
| EXPECT_RESULT_OK(mFakeCookieTagMap.writeValue(cookie, cookieMapkey, BPF_ANY)); |
| *key = {.uid = uid, .tag = tag, .counterSet = TEST_COUNTERSET, .ifaceIndex = 1}; |
| StatsValue statsMapValue = {.rxPackets = 1, .rxBytes = 100}; |
| EXPECT_RESULT_OK(mFakeStatsMapA.writeValue(*key, statsMapValue, BPF_ANY)); |
| key->tag = 0; |
| EXPECT_RESULT_OK(mFakeStatsMapA.writeValue(*key, statsMapValue, BPF_ANY)); |
| EXPECT_RESULT_OK(mFakeAppUidStatsMap.writeValue(uid, statsMapValue, BPF_ANY)); |
| // put tag information back to statsKey |
| key->tag = tag; |
| } |
| |
| void checkUidOwnerRuleForChain(ChildChain chain, UidOwnerMatchType match) { |
| uint32_t uid = TEST_UID; |
| EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, DENY, DENYLIST)); |
| Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid); |
| EXPECT_RESULT_OK(value); |
| EXPECT_TRUE(value.value().rule & match); |
| |
| uid = TEST_UID2; |
| EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, ALLOW, ALLOWLIST)); |
| value = mFakeUidOwnerMap.readValue(uid); |
| EXPECT_RESULT_OK(value); |
| EXPECT_TRUE(value.value().rule & match); |
| |
| EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, DENY, ALLOWLIST)); |
| value = mFakeUidOwnerMap.readValue(uid); |
| EXPECT_FALSE(value.ok()); |
| EXPECT_EQ(ENOENT, value.error().code()); |
| |
| uid = TEST_UID; |
| EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, ALLOW, DENYLIST)); |
| value = mFakeUidOwnerMap.readValue(uid); |
| EXPECT_FALSE(value.ok()); |
| EXPECT_EQ(ENOENT, value.error().code()); |
| |
| uid = TEST_UID3; |
| EXPECT_EQ(-ENOENT, mTc.changeUidOwnerRule(chain, uid, ALLOW, DENYLIST)); |
| value = mFakeUidOwnerMap.readValue(uid); |
| EXPECT_FALSE(value.ok()); |
| EXPECT_EQ(ENOENT, value.error().code()); |
| } |
| |
| void checkEachUidValue(const std::vector<int32_t>& uids, UidOwnerMatchType match) { |
| for (uint32_t uid : uids) { |
| Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid); |
| EXPECT_RESULT_OK(value); |
| EXPECT_TRUE(value.value().rule & match); |
| } |
| std::set<uint32_t> uidSet(uids.begin(), uids.end()); |
| const auto checkNoOtherUid = [&uidSet](const int32_t& key, |
| const BpfMap<uint32_t, UidOwnerValue>&) { |
| EXPECT_NE(uidSet.end(), uidSet.find(key)); |
| return Result<void>(); |
| }; |
| EXPECT_RESULT_OK(mFakeUidOwnerMap.iterate(checkNoOtherUid)); |
| } |
| |
| void checkUidMapReplace(const std::string& name, const std::vector<int32_t>& uids, |
| UidOwnerMatchType match) { |
| bool isAllowlist = true; |
| EXPECT_EQ(0, mTc.replaceUidOwnerMap(name, isAllowlist, uids)); |
| checkEachUidValue(uids, match); |
| |
| isAllowlist = false; |
| EXPECT_EQ(0, mTc.replaceUidOwnerMap(name, isAllowlist, uids)); |
| checkEachUidValue(uids, match); |
| } |
| |
| void expectUidOwnerMapValues(const std::vector<uint32_t>& appUids, uint8_t expectedRule, |
| uint32_t expectedIif) { |
| for (uint32_t uid : appUids) { |
| Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid); |
| EXPECT_RESULT_OK(value); |
| EXPECT_EQ(expectedRule, value.value().rule) |
| << "Expected rule for UID " << uid << " to be " << expectedRule << ", but was " |
| << value.value().rule; |
| EXPECT_EQ(expectedIif, value.value().iif) |
| << "Expected iif for UID " << uid << " to be " << expectedIif << ", but was " |
| << value.value().iif; |
| } |
| } |
| |
| template <class Key, class Value> |
| void expectMapEmpty(BpfMap<Key, Value>& map) { |
| auto isEmpty = map.isEmpty(); |
| EXPECT_RESULT_OK(isEmpty); |
| EXPECT_TRUE(isEmpty.value()); |
| } |
| |
| void expectUidPermissionMapValues(const std::vector<uid_t>& appUids, uint8_t expectedValue) { |
| for (uid_t uid : appUids) { |
| Result<uint8_t> value = mFakeUidPermissionMap.readValue(uid); |
| EXPECT_RESULT_OK(value); |
| EXPECT_EQ(expectedValue, value.value()) |
| << "Expected value for UID " << uid << " to be " << expectedValue |
| << ", but was " << value.value(); |
| } |
| } |
| |
| void expectPrivilegedUserSet(const std::vector<uid_t>& appUids) { |
| std::lock_guard guard(mTc.mMutex); |
| EXPECT_EQ(appUids.size(), mTc.mPrivilegedUser.size()); |
| for (uid_t uid : appUids) { |
| EXPECT_NE(mTc.mPrivilegedUser.end(), mTc.mPrivilegedUser.find(uid)); |
| } |
| } |
| |
| void expectPrivilegedUserSetEmpty() { |
| std::lock_guard guard(mTc.mMutex); |
| EXPECT_TRUE(mTc.mPrivilegedUser.empty()); |
| } |
| |
| void addPrivilegedUid(uid_t uid) { |
| std::vector privilegedUid = {uid}; |
| mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, privilegedUid); |
| } |
| |
| void removePrivilegedUid(uid_t uid) { |
| std::vector privilegedUid = {uid}; |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, privilegedUid); |
| } |
| |
| void expectFakeStatsUnchanged(uint64_t cookie, uint32_t tag, uint32_t uid, |
| StatsKey tagStatsMapKey) { |
| Result<UidTagValue> cookieMapResult = mFakeCookieTagMap.readValue(cookie); |
| EXPECT_RESULT_OK(cookieMapResult); |
| EXPECT_EQ(uid, cookieMapResult.value().uid); |
| EXPECT_EQ(tag, cookieMapResult.value().tag); |
| Result<StatsValue> statsMapResult = mFakeStatsMapA.readValue(tagStatsMapKey); |
| EXPECT_RESULT_OK(statsMapResult); |
| EXPECT_EQ((uint64_t)1, statsMapResult.value().rxPackets); |
| EXPECT_EQ((uint64_t)100, statsMapResult.value().rxBytes); |
| tagStatsMapKey.tag = 0; |
| statsMapResult = mFakeStatsMapA.readValue(tagStatsMapKey); |
| EXPECT_RESULT_OK(statsMapResult); |
| EXPECT_EQ((uint64_t)1, statsMapResult.value().rxPackets); |
| EXPECT_EQ((uint64_t)100, statsMapResult.value().rxBytes); |
| auto appStatsResult = mFakeAppUidStatsMap.readValue(uid); |
| EXPECT_RESULT_OK(appStatsResult); |
| EXPECT_EQ((uint64_t)1, appStatsResult.value().rxPackets); |
| EXPECT_EQ((uint64_t)100, appStatsResult.value().rxBytes); |
| } |
| |
| Status updateUidOwnerMaps(const std::vector<uint32_t>& appUids, |
| UidOwnerMatchType matchType, TrafficController::IptOp op) { |
| Status ret(0); |
| for (auto uid : appUids) { |
| ret = mTc.updateUidOwnerMap(uid, matchType, op); |
| if(!isOk(ret)) break; |
| } |
| return ret; |
| } |
| |
| }; |
| |
| TEST_F(TrafficControllerTest, TestUpdateOwnerMapEntry) { |
| uint32_t uid = TEST_UID; |
| ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(STANDBY_MATCH, uid, DENY, DENYLIST))); |
| Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid); |
| ASSERT_RESULT_OK(value); |
| ASSERT_TRUE(value.value().rule & STANDBY_MATCH); |
| |
| ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(DOZABLE_MATCH, uid, ALLOW, ALLOWLIST))); |
| value = mFakeUidOwnerMap.readValue(uid); |
| ASSERT_RESULT_OK(value); |
| ASSERT_TRUE(value.value().rule & DOZABLE_MATCH); |
| |
| ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(DOZABLE_MATCH, uid, DENY, ALLOWLIST))); |
| value = mFakeUidOwnerMap.readValue(uid); |
| ASSERT_RESULT_OK(value); |
| ASSERT_FALSE(value.value().rule & DOZABLE_MATCH); |
| |
| ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(STANDBY_MATCH, uid, ALLOW, DENYLIST))); |
| ASSERT_FALSE(mFakeUidOwnerMap.readValue(uid).ok()); |
| |
| uid = TEST_UID2; |
| ASSERT_FALSE(isOk(mTc.updateOwnerMapEntry(STANDBY_MATCH, uid, ALLOW, DENYLIST))); |
| ASSERT_FALSE(mFakeUidOwnerMap.readValue(uid).ok()); |
| } |
| |
| TEST_F(TrafficControllerTest, TestChangeUidOwnerRule) { |
| checkUidOwnerRuleForChain(DOZABLE, DOZABLE_MATCH); |
| checkUidOwnerRuleForChain(STANDBY, STANDBY_MATCH); |
| checkUidOwnerRuleForChain(POWERSAVE, POWERSAVE_MATCH); |
| checkUidOwnerRuleForChain(RESTRICTED, RESTRICTED_MATCH); |
| checkUidOwnerRuleForChain(LOW_POWER_STANDBY, LOW_POWER_STANDBY_MATCH); |
| checkUidOwnerRuleForChain(LOCKDOWN, LOCKDOWN_VPN_MATCH); |
| checkUidOwnerRuleForChain(OEM_DENY_1, OEM_DENY_1_MATCH); |
| checkUidOwnerRuleForChain(OEM_DENY_2, OEM_DENY_2_MATCH); |
| checkUidOwnerRuleForChain(OEM_DENY_3, OEM_DENY_3_MATCH); |
| ASSERT_EQ(-EINVAL, mTc.changeUidOwnerRule(NONE, TEST_UID, ALLOW, ALLOWLIST)); |
| ASSERT_EQ(-EINVAL, mTc.changeUidOwnerRule(INVALID_CHAIN, TEST_UID, ALLOW, ALLOWLIST)); |
| } |
| |
| TEST_F(TrafficControllerTest, TestReplaceUidOwnerMap) { |
| std::vector<int32_t> uids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| checkUidMapReplace("fw_dozable", uids, DOZABLE_MATCH); |
| checkUidMapReplace("fw_standby", uids, STANDBY_MATCH); |
| checkUidMapReplace("fw_powersave", uids, POWERSAVE_MATCH); |
| checkUidMapReplace("fw_restricted", uids, RESTRICTED_MATCH); |
| checkUidMapReplace("fw_low_power_standby", uids, LOW_POWER_STANDBY_MATCH); |
| checkUidMapReplace("fw_oem_deny_1", uids, OEM_DENY_1_MATCH); |
| checkUidMapReplace("fw_oem_deny_2", uids, OEM_DENY_2_MATCH); |
| checkUidMapReplace("fw_oem_deny_3", uids, OEM_DENY_3_MATCH); |
| ASSERT_EQ(-EINVAL, mTc.replaceUidOwnerMap("unknow", true, uids)); |
| } |
| |
| TEST_F(TrafficControllerTest, TestReplaceSameChain) { |
| std::vector<int32_t> uids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| checkUidMapReplace("fw_dozable", uids, DOZABLE_MATCH); |
| std::vector<int32_t> newUids = {TEST_UID2, TEST_UID3}; |
| checkUidMapReplace("fw_dozable", newUids, DOZABLE_MATCH); |
| } |
| |
| TEST_F(TrafficControllerTest, TestDenylistUidMatch) { |
| std::vector<uint32_t> appUids = {1000, 1001, 10012}; |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH, |
| TrafficController::IptOpInsert))); |
| expectUidOwnerMapValues(appUids, PENALTY_BOX_MATCH, 0); |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH, |
| TrafficController::IptOpDelete))); |
| expectMapEmpty(mFakeUidOwnerMap); |
| } |
| |
| TEST_F(TrafficControllerTest, TestAllowlistUidMatch) { |
| std::vector<uint32_t> appUids = {1000, 1001, 10012}; |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpInsert))); |
| expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH, 0); |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpDelete))); |
| expectMapEmpty(mFakeUidOwnerMap); |
| } |
| |
| TEST_F(TrafficControllerTest, TestReplaceMatchUid) { |
| std::vector<uint32_t> appUids = {1000, 1001, 10012}; |
| // Add appUids to the denylist and expect that their values are all PENALTY_BOX_MATCH. |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH, |
| TrafficController::IptOpInsert))); |
| expectUidOwnerMapValues(appUids, PENALTY_BOX_MATCH, 0); |
| |
| // Add the same UIDs to the allowlist and expect that we get PENALTY_BOX_MATCH | |
| // HAPPY_BOX_MATCH. |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpInsert))); |
| expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH | PENALTY_BOX_MATCH, 0); |
| |
| // Remove the same UIDs from the allowlist and check the PENALTY_BOX_MATCH is still there. |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpDelete))); |
| expectUidOwnerMapValues(appUids, PENALTY_BOX_MATCH, 0); |
| |
| // Remove the same UIDs from the denylist and check the map is empty. |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH, |
| TrafficController::IptOpDelete))); |
| ASSERT_FALSE(mFakeUidOwnerMap.getFirstKey().ok()); |
| } |
| |
| TEST_F(TrafficControllerTest, TestDeleteWrongMatchSilentlyFails) { |
| std::vector<uint32_t> appUids = {1000, 1001, 10012}; |
| // If the uid does not exist in the map, trying to delete a rule about it will fail. |
| ASSERT_FALSE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, |
| TrafficController::IptOpDelete))); |
| expectMapEmpty(mFakeUidOwnerMap); |
| |
| // Add denylist rules for appUids. |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, |
| TrafficController::IptOpInsert))); |
| expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH, 0); |
| |
| // Delete (non-existent) denylist rules for appUids, and check that this silently does |
| // nothing if the uid is in the map but does not have denylist match. This is required because |
| // NetworkManagementService will try to remove a uid from denylist after adding it to the |
| // allowlist and if the remove fails it will not update the uid status. |
| ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH, |
| TrafficController::IptOpDelete))); |
| expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH, 0); |
| } |
| |
| TEST_F(TrafficControllerTest, TestAddUidInterfaceFilteringRules) { |
| int iif0 = 15; |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif0, {1000, 1001}))); |
| expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif0); |
| |
| // Add some non-overlapping new uids. They should coexist with existing rules |
| int iif1 = 16; |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {2000, 2001}))); |
| expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif0); |
| expectUidOwnerMapValues({2000, 2001}, IIF_MATCH, iif1); |
| |
| // Overwrite some existing uids |
| int iif2 = 17; |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif2, {1000, 2000}))); |
| expectUidOwnerMapValues({1001}, IIF_MATCH, iif0); |
| expectUidOwnerMapValues({2001}, IIF_MATCH, iif1); |
| expectUidOwnerMapValues({1000, 2000}, IIF_MATCH, iif2); |
| } |
| |
| TEST_F(TrafficControllerTest, TestRemoveUidInterfaceFilteringRules) { |
| int iif0 = 15; |
| int iif1 = 16; |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif0, {1000, 1001}))); |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {2000, 2001}))); |
| expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif0); |
| expectUidOwnerMapValues({2000, 2001}, IIF_MATCH, iif1); |
| |
| // Rmove some uids |
| ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1001, 2001}))); |
| expectUidOwnerMapValues({1000}, IIF_MATCH, iif0); |
| expectUidOwnerMapValues({2000}, IIF_MATCH, iif1); |
| checkEachUidValue({1000, 2000}, IIF_MATCH); // Make sure there are only two uids remaining |
| |
| // Remove non-existent uids shouldn't fail |
| ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({2000, 3000}))); |
| expectUidOwnerMapValues({1000}, IIF_MATCH, iif0); |
| checkEachUidValue({1000}, IIF_MATCH); // Make sure there are only one uid remaining |
| |
| // Remove everything |
| ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1000}))); |
| expectMapEmpty(mFakeUidOwnerMap); |
| } |
| |
| TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesCoexistWithExistingMatches) { |
| // Set up existing PENALTY_BOX_MATCH rules |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1000, 1001, 10012}, PENALTY_BOX_MATCH, |
| TrafficController::IptOpInsert))); |
| expectUidOwnerMapValues({1000, 1001, 10012}, PENALTY_BOX_MATCH, 0); |
| |
| // Add some partially-overlapping uid owner rules and check result |
| int iif1 = 32; |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {10012, 10013, 10014}))); |
| expectUidOwnerMapValues({1000, 1001}, PENALTY_BOX_MATCH, 0); |
| expectUidOwnerMapValues({10012}, PENALTY_BOX_MATCH | IIF_MATCH, iif1); |
| expectUidOwnerMapValues({10013, 10014}, IIF_MATCH, iif1); |
| |
| // Removing some PENALTY_BOX_MATCH rules should not change uid interface rule |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1001, 10012}, PENALTY_BOX_MATCH, |
| TrafficController::IptOpDelete))); |
| expectUidOwnerMapValues({1000}, PENALTY_BOX_MATCH, 0); |
| expectUidOwnerMapValues({10012, 10013, 10014}, IIF_MATCH, iif1); |
| |
| // Remove all uid interface rules |
| ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({10012, 10013, 10014}))); |
| expectUidOwnerMapValues({1000}, PENALTY_BOX_MATCH, 0); |
| // Make sure these are the only uids left |
| checkEachUidValue({1000}, PENALTY_BOX_MATCH); |
| } |
| |
| TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesCoexistWithNewMatches) { |
| int iif1 = 56; |
| // Set up existing uid interface rules |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {10001, 10002}))); |
| expectUidOwnerMapValues({10001, 10002}, IIF_MATCH, iif1); |
| |
| // Add some partially-overlapping doze rules |
| EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_dozable", true, {10002, 10003})); |
| expectUidOwnerMapValues({10001}, IIF_MATCH, iif1); |
| expectUidOwnerMapValues({10002}, DOZABLE_MATCH | IIF_MATCH, iif1); |
| expectUidOwnerMapValues({10003}, DOZABLE_MATCH, 0); |
| |
| // Introduce a third rule type (powersave) on various existing UIDs |
| EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_powersave", true, {10000, 10001, 10002, 10003})); |
| expectUidOwnerMapValues({10000}, POWERSAVE_MATCH, 0); |
| expectUidOwnerMapValues({10001}, POWERSAVE_MATCH | IIF_MATCH, iif1); |
| expectUidOwnerMapValues({10002}, POWERSAVE_MATCH | DOZABLE_MATCH | IIF_MATCH, iif1); |
| expectUidOwnerMapValues({10003}, POWERSAVE_MATCH | DOZABLE_MATCH, 0); |
| |
| // Remove all doze rules |
| EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_dozable", true, {})); |
| expectUidOwnerMapValues({10000}, POWERSAVE_MATCH, 0); |
| expectUidOwnerMapValues({10001}, POWERSAVE_MATCH | IIF_MATCH, iif1); |
| expectUidOwnerMapValues({10002}, POWERSAVE_MATCH | IIF_MATCH, iif1); |
| expectUidOwnerMapValues({10003}, POWERSAVE_MATCH, 0); |
| |
| // Remove all powersave rules, expect ownerMap to only have uid interface rules left |
| EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_powersave", true, {})); |
| expectUidOwnerMapValues({10001, 10002}, IIF_MATCH, iif1); |
| // Make sure these are the only uids left |
| checkEachUidValue({10001, 10002}, IIF_MATCH); |
| } |
| |
| TEST_F(TrafficControllerTest, TestAddUidInterfaceFilteringRulesWithWildcard) { |
| // iif=0 is a wildcard |
| int iif = 0; |
| // Add interface rule with wildcard to uids |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000, 1001}))); |
| expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif); |
| } |
| |
| TEST_F(TrafficControllerTest, TestRemoveUidInterfaceFilteringRulesWithWildcard) { |
| // iif=0 is a wildcard |
| int iif = 0; |
| // Add interface rule with wildcard to two uids |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000, 1001}))); |
| expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif); |
| |
| // Remove interface rule from one of the uids |
| ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1000}))); |
| expectUidOwnerMapValues({1001}, IIF_MATCH, iif); |
| checkEachUidValue({1001}, IIF_MATCH); |
| |
| // Remove interface rule from the remaining uid |
| ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1001}))); |
| expectMapEmpty(mFakeUidOwnerMap); |
| } |
| |
| TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesWithWildcardAndExistingMatches) { |
| // Set up existing DOZABLE_MATCH and POWERSAVE_MATCH rule |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, DOZABLE_MATCH, |
| TrafficController::IptOpInsert))); |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, POWERSAVE_MATCH, |
| TrafficController::IptOpInsert))); |
| |
| // iif=0 is a wildcard |
| int iif = 0; |
| // Add interface rule with wildcard to the existing uid |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000}))); |
| expectUidOwnerMapValues({1000}, POWERSAVE_MATCH | DOZABLE_MATCH | IIF_MATCH, iif); |
| |
| // Remove interface rule with wildcard from the existing uid |
| ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1000}))); |
| expectUidOwnerMapValues({1000}, POWERSAVE_MATCH | DOZABLE_MATCH, 0); |
| } |
| |
| TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesWithWildcardAndNewMatches) { |
| // iif=0 is a wildcard |
| int iif = 0; |
| // Set up existing interface rule with wildcard |
| ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000}))); |
| |
| // Add DOZABLE_MATCH and POWERSAVE_MATCH rule to the existing uid |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, DOZABLE_MATCH, |
| TrafficController::IptOpInsert))); |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, POWERSAVE_MATCH, |
| TrafficController::IptOpInsert))); |
| expectUidOwnerMapValues({1000}, POWERSAVE_MATCH | DOZABLE_MATCH | IIF_MATCH, iif); |
| |
| // Remove DOZABLE_MATCH and POWERSAVE_MATCH rule from the existing uid |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, DOZABLE_MATCH, |
| TrafficController::IptOpDelete))); |
| ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, POWERSAVE_MATCH, |
| TrafficController::IptOpDelete))); |
| expectUidOwnerMapValues({1000}, IIF_MATCH, iif); |
| } |
| |
| TEST_F(TrafficControllerTest, TestGrantInternetPermission) { |
| std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_INTERNET, appUids); |
| expectMapEmpty(mFakeUidPermissionMap); |
| expectPrivilegedUserSetEmpty(); |
| } |
| |
| TEST_F(TrafficControllerTest, TestRevokeInternetPermission) { |
| std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids); |
| expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE); |
| } |
| |
| TEST_F(TrafficControllerTest, TestPermissionUninstalled) { |
| std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids); |
| expectUidPermissionMapValues(appUids, INetd::PERMISSION_UPDATE_DEVICE_STATS); |
| expectPrivilegedUserSet(appUids); |
| |
| std::vector<uid_t> uidToRemove = {TEST_UID}; |
| mTc.setPermissionForUids(INetd::PERMISSION_UNINSTALLED, uidToRemove); |
| |
| std::vector<uid_t> uidRemain = {TEST_UID3, TEST_UID2}; |
| expectUidPermissionMapValues(uidRemain, INetd::PERMISSION_UPDATE_DEVICE_STATS); |
| expectPrivilegedUserSet(uidRemain); |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_UNINSTALLED, uidRemain); |
| expectMapEmpty(mFakeUidPermissionMap); |
| expectPrivilegedUserSetEmpty(); |
| } |
| |
| TEST_F(TrafficControllerTest, TestGrantUpdateStatsPermission) { |
| std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids); |
| expectUidPermissionMapValues(appUids, INetd::PERMISSION_UPDATE_DEVICE_STATS); |
| expectPrivilegedUserSet(appUids); |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids); |
| expectPrivilegedUserSetEmpty(); |
| expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE); |
| } |
| |
| TEST_F(TrafficControllerTest, TestRevokeUpdateStatsPermission) { |
| std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids); |
| expectPrivilegedUserSet(appUids); |
| |
| std::vector<uid_t> uidToRemove = {TEST_UID}; |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, uidToRemove); |
| |
| std::vector<uid_t> uidRemain = {TEST_UID3, TEST_UID2}; |
| expectPrivilegedUserSet(uidRemain); |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, uidRemain); |
| expectPrivilegedUserSetEmpty(); |
| } |
| |
| TEST_F(TrafficControllerTest, TestGrantWrongPermission) { |
| std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids); |
| expectPrivilegedUserSetEmpty(); |
| expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE); |
| } |
| |
| TEST_F(TrafficControllerTest, TestGrantDuplicatePermissionSlientlyFail) { |
| std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3}; |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_INTERNET, appUids); |
| expectMapEmpty(mFakeUidPermissionMap); |
| |
| std::vector<uid_t> uidToAdd = {TEST_UID}; |
| mTc.setPermissionForUids(INetd::PERMISSION_INTERNET, uidToAdd); |
| |
| expectPrivilegedUserSetEmpty(); |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids); |
| expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE); |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids); |
| expectPrivilegedUserSet(appUids); |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, uidToAdd); |
| expectPrivilegedUserSet(appUids); |
| |
| mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids); |
| expectPrivilegedUserSetEmpty(); |
| } |
| |
| constexpr uint32_t SOCK_CLOSE_WAIT_US = 30 * 1000; |
| constexpr uint32_t ENOBUFS_POLL_WAIT_US = 10 * 1000; |
| |
| using android::base::Error; |
| using android::base::Result; |
| using android::bpf::BpfMap; |
| |
| // This test set up a SkDestroyListener that is running parallel with the production |
| // SkDestroyListener. The test will create thousands of sockets and tag them on the |
| // production cookieUidTagMap and close them in a short time. When the number of |
| // sockets get closed exceeds the buffer size, it will start to return ENOBUFF |
| // error. The error will be ignored by the production SkDestroyListener and the |
| // test will clean up the tags in tearDown if there is any remains. |
| |
| // TODO: Instead of test the ENOBUFF error, we can test the production |
| // SkDestroyListener to see if it failed to delete a tagged socket when ENOBUFF |
| // triggered. |
| class NetlinkListenerTest : public testing::Test { |
| protected: |
| NetlinkListenerTest() {} |
| BpfMap<uint64_t, UidTagValue> mCookieTagMap; |
| |
| void SetUp() { |
| mCookieTagMap.init(COOKIE_TAG_MAP_PATH); |
| ASSERT_TRUE(mCookieTagMap.isValid()); |
| } |
| |
| void TearDown() { |
| const auto deleteTestCookieEntries = [](const uint64_t& key, const UidTagValue& value, |
| BpfMap<uint64_t, UidTagValue>& map) { |
| if ((value.uid == TEST_UID) && (value.tag == TEST_TAG)) { |
| Result<void> res = map.deleteValue(key); |
| if (res.ok() || (res.error().code() == ENOENT)) { |
| return Result<void>(); |
| } |
| ALOGE("Failed to delete data(cookie = %" PRIu64 "): %s\n", key, |
| strerror(res.error().code())); |
| } |
| // Move forward to next cookie in the map. |
| return Result<void>(); |
| }; |
| EXPECT_RESULT_OK(mCookieTagMap.iterateWithValue(deleteTestCookieEntries)); |
| } |
| |
| Result<void> checkNoGarbageTagsExist() { |
| const auto checkGarbageTags = [](const uint64_t&, const UidTagValue& value, |
| const BpfMap<uint64_t, UidTagValue>&) -> Result<void> { |
| if ((TEST_UID == value.uid) && (TEST_TAG == value.tag)) { |
| return Error(EUCLEAN) << "Closed socket is not untagged"; |
| } |
| return {}; |
| }; |
| return mCookieTagMap.iterateWithValue(checkGarbageTags); |
| } |
| |
| bool checkMassiveSocketDestroy(int totalNumber, bool expectError) { |
| std::unique_ptr<android::netdutils::NetlinkListenerInterface> skDestroyListener; |
| auto result = android::net::TrafficController::makeSkDestroyListener(); |
| if (!isOk(result)) { |
| ALOGE("Unable to create SkDestroyListener: %s", toString(result).c_str()); |
| } else { |
| skDestroyListener = std::move(result.value()); |
| } |
| int rxErrorCount = 0; |
| // Rx handler extracts nfgenmsg looks up and invokes registered dispatch function. |
| const auto rxErrorHandler = [&rxErrorCount](const int, const int) { rxErrorCount++; }; |
| skDestroyListener->registerSkErrorHandler(rxErrorHandler); |
| int fds[totalNumber]; |
| for (int i = 0; i < totalNumber; i++) { |
| fds[i] = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0); |
| // The likely reason for a failure is running out of available file descriptors. |
| EXPECT_LE(0, fds[i]) << i << " of " << totalNumber; |
| if (fds[i] < 0) { |
| // EXPECT_LE already failed above, so test case is a failure, but we don't |
| // want potentially tens of thousands of extra failures creating and then |
| // closing all these fds cluttering up the logs. |
| totalNumber = i; |
| break; |
| }; |
| libnetd_updatable_tagSocket(fds[i], TEST_TAG, TEST_UID, 1000); |
| } |
| |
| // TODO: Use a separate thread that has its own fd table so we can |
| // close sockets even faster simply by terminating that thread. |
| for (int i = 0; i < totalNumber; i++) { |
| EXPECT_EQ(0, close(fds[i])); |
| } |
| // wait a bit for netlink listener to handle all the messages. |
| usleep(SOCK_CLOSE_WAIT_US); |
| if (expectError) { |
| // If ENOBUFS triggered, check it only called into the handler once, ie. |
| // that the netlink handler is not spinning. |
| int currentErrorCount = rxErrorCount; |
| // 0 error count is acceptable because the system has chances to close all sockets |
| // normally. |
| EXPECT_LE(0, rxErrorCount); |
| if (!rxErrorCount) return true; |
| |
| usleep(ENOBUFS_POLL_WAIT_US); |
| EXPECT_EQ(currentErrorCount, rxErrorCount); |
| } else { |
| EXPECT_RESULT_OK(checkNoGarbageTagsExist()); |
| EXPECT_EQ(0, rxErrorCount); |
| } |
| return false; |
| } |
| }; |
| |
| TEST_F(NetlinkListenerTest, TestAllSocketUntagged) { |
| checkMassiveSocketDestroy(10, false); |
| checkMassiveSocketDestroy(100, false); |
| } |
| |
| // Disabled because flaky on blueline-userdebug; this test relies on the main thread |
| // winning a race against the NetlinkListener::run() thread. There's no way to ensure |
| // things will be scheduled the same way across all architectures and test environments. |
| TEST_F(NetlinkListenerTest, DISABLED_TestSkDestroyError) { |
| bool needRetry = false; |
| int retryCount = 0; |
| do { |
| needRetry = checkMassiveSocketDestroy(32500, true); |
| if (needRetry) retryCount++; |
| } while (needRetry && retryCount < 3); |
| // Should review test if it can always close all sockets correctly. |
| EXPECT_GT(3, retryCount); |
| } |
| |
| |
| } // namespace net |
| } // namespace android |
