| /* |
| * Copyright (C) 2018 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 <string> |
| |
| #include <fcntl.h> |
| #include <inttypes.h> |
| #include <limits.h> |
| #include <linux/inet_diag.h> |
| #include <linux/sock_diag.h> |
| #include <net/if.h> |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <gtest/gtest.h> |
| |
| #include <cutils/qtaguid.h> |
| #include <processgroup/processgroup.h> |
| |
| #include <android-base/stringprintf.h> |
| #include <android-base/strings.h> |
| |
| #include "bpf/BpfMap.h" |
| #include "bpf/BpfUtils.h" |
| #include "netdbpf/bpf_shared.h" |
| |
| using android::base::Result; |
| |
| namespace android { |
| namespace bpf { |
| |
| // Use the upper limit of uid to avoid conflict with real app uids. We can't use UID_MAX because |
| // it's -1, which is INVALID_UID. |
| constexpr uid_t TEST_UID = UID_MAX - 1; |
| constexpr uint32_t TEST_TAG = 42; |
| constexpr int TEST_COUNTERSET = 1; |
| constexpr int DEFAULT_COUNTERSET = 0; |
| |
| class BpfBasicTest : public testing::Test { |
| protected: |
| BpfBasicTest() {} |
| }; |
| |
| TEST_F(BpfBasicTest, TestCgroupMounted) { |
| SKIP_IF_BPF_NOT_SUPPORTED; |
| |
| std::string cg2_path; |
| #if 0 |
| // This is the correct way to fetch cg2_path, but it occasionally hits ASAN |
| // problems due to memory allocated in non ASAN code being freed later by us |
| ASSERT_EQ(true, CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &cg2_path)); |
| #else |
| ASSERT_EQ(true, CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, nullptr)); |
| // Constant derived from //system/core/libprocessgroup/profiles/cgroups.json |
| cg2_path = "/dev/cg2_bpf"; |
| #endif |
| ASSERT_EQ(0, access(cg2_path.c_str(), R_OK)); |
| ASSERT_EQ(0, access((cg2_path + "/cgroup.controllers").c_str(), R_OK)); |
| } |
| |
| TEST_F(BpfBasicTest, TestTrafficControllerSetUp) { |
| SKIP_IF_BPF_NOT_SUPPORTED; |
| |
| ASSERT_EQ(0, access(BPF_EGRESS_PROG_PATH, R_OK)); |
| ASSERT_EQ(0, access(BPF_INGRESS_PROG_PATH, R_OK)); |
| ASSERT_EQ(0, access(XT_BPF_INGRESS_PROG_PATH, R_OK)); |
| ASSERT_EQ(0, access(XT_BPF_EGRESS_PROG_PATH, R_OK)); |
| ASSERT_EQ(0, access(COOKIE_TAG_MAP_PATH, R_OK)); |
| ASSERT_EQ(0, access(UID_COUNTERSET_MAP_PATH, R_OK)); |
| ASSERT_EQ(0, access(STATS_MAP_A_PATH, R_OK)); |
| ASSERT_EQ(0, access(STATS_MAP_B_PATH, R_OK)); |
| ASSERT_EQ(0, access(IFACE_INDEX_NAME_MAP_PATH, R_OK)); |
| ASSERT_EQ(0, access(IFACE_STATS_MAP_PATH, R_OK)); |
| ASSERT_EQ(0, access(CONFIGURATION_MAP_PATH, R_OK)); |
| ASSERT_EQ(0, access(UID_OWNER_MAP_PATH, R_OK)); |
| } |
| |
| TEST_F(BpfBasicTest, TestSocketFilterSetUp) { |
| SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED; |
| |
| ASSERT_EQ(0, access(CGROUP_SOCKET_PROG_PATH, R_OK)); |
| ASSERT_EQ(0, access(UID_PERMISSION_MAP_PATH, R_OK)); |
| } |
| |
| TEST_F(BpfBasicTest, TestTagSocket) { |
| SKIP_IF_BPF_NOT_SUPPORTED; |
| |
| BpfMap<uint64_t, UidTagValue> cookieTagMap(COOKIE_TAG_MAP_PATH); |
| ASSERT_LE(0, cookieTagMap.getMap()); |
| int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0); |
| ASSERT_LE(0, sock); |
| uint64_t cookie = getSocketCookie(sock); |
| ASSERT_NE(NONEXISTENT_COOKIE, cookie); |
| ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID)); |
| Result<UidTagValue> tagResult = cookieTagMap.readValue(cookie); |
| ASSERT_RESULT_OK(tagResult); |
| ASSERT_EQ(TEST_UID, tagResult.value().uid); |
| ASSERT_EQ(TEST_TAG, tagResult.value().tag); |
| ASSERT_EQ(0, qtaguid_untagSocket(sock)); |
| tagResult = cookieTagMap.readValue(cookie); |
| ASSERT_FALSE(tagResult.ok()); |
| ASSERT_EQ(ENOENT, tagResult.error().code()); |
| } |
| |
| TEST_F(BpfBasicTest, TestCloseSocketWithoutUntag) { |
| SKIP_IF_BPF_NOT_SUPPORTED; |
| |
| BpfMap<uint64_t, UidTagValue> cookieTagMap(COOKIE_TAG_MAP_PATH); |
| ASSERT_LE(0, cookieTagMap.getMap()); |
| int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0); |
| ASSERT_LE(0, sock); |
| uint64_t cookie = getSocketCookie(sock); |
| ASSERT_NE(NONEXISTENT_COOKIE, cookie); |
| ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID)); |
| Result<UidTagValue> tagResult = cookieTagMap.readValue(cookie); |
| ASSERT_RESULT_OK(tagResult); |
| ASSERT_EQ(TEST_UID, tagResult.value().uid); |
| ASSERT_EQ(TEST_TAG, tagResult.value().tag); |
| ASSERT_EQ(0, close(sock)); |
| // Check map periodically until sk destroy handler have done its job. |
| for (int i = 0; i < 10; i++) { |
| usleep(5000); // 5ms |
| tagResult = cookieTagMap.readValue(cookie); |
| if (!tagResult.ok()) { |
| ASSERT_EQ(ENOENT, tagResult.error().code()); |
| return; |
| } |
| } |
| FAIL() << "socket tag still exist after 50ms"; |
| } |
| |
| TEST_F(BpfBasicTest, TestChangeCounterSet) { |
| SKIP_IF_BPF_NOT_SUPPORTED; |
| |
| BpfMap<uint32_t, uint8_t> uidCounterSetMap(UID_COUNTERSET_MAP_PATH); |
| ASSERT_LE(0, uidCounterSetMap.getMap()); |
| ASSERT_EQ(0, qtaguid_setCounterSet(TEST_COUNTERSET, TEST_UID)); |
| uid_t uid = TEST_UID; |
| Result<uint8_t> counterSetResult = uidCounterSetMap.readValue(uid); |
| ASSERT_RESULT_OK(counterSetResult); |
| ASSERT_EQ(TEST_COUNTERSET, counterSetResult.value()); |
| ASSERT_EQ(0, qtaguid_setCounterSet(DEFAULT_COUNTERSET, TEST_UID)); |
| counterSetResult = uidCounterSetMap.readValue(uid); |
| ASSERT_FALSE(counterSetResult.ok()); |
| ASSERT_EQ(ENOENT, counterSetResult.error().code()); |
| } |
| |
| TEST_F(BpfBasicTest, TestDeleteTagData) { |
| SKIP_IF_BPF_NOT_SUPPORTED; |
| |
| BpfMap<StatsKey, StatsValue> statsMapA(STATS_MAP_A_PATH); |
| ASSERT_LE(0, statsMapA.getMap()); |
| BpfMap<StatsKey, StatsValue> statsMapB(STATS_MAP_B_PATH); |
| ASSERT_LE(0, statsMapB.getMap()); |
| BpfMap<uint32_t, StatsValue> appUidStatsMap(APP_UID_STATS_MAP_PATH); |
| ASSERT_LE(0, appUidStatsMap.getMap()); |
| |
| StatsKey key = {.uid = TEST_UID, .tag = TEST_TAG, .counterSet = TEST_COUNTERSET, |
| .ifaceIndex = 1}; |
| StatsValue statsMapValue = {.rxPackets = 1, .rxBytes = 100}; |
| EXPECT_RESULT_OK(statsMapB.writeValue(key, statsMapValue, BPF_ANY)); |
| key.tag = 0; |
| EXPECT_RESULT_OK(statsMapA.writeValue(key, statsMapValue, BPF_ANY)); |
| EXPECT_RESULT_OK(appUidStatsMap.writeValue(TEST_UID, statsMapValue, BPF_ANY)); |
| ASSERT_EQ(0, qtaguid_deleteTagData(0, TEST_UID)); |
| Result<StatsValue> statsResult = statsMapA.readValue(key); |
| ASSERT_FALSE(statsResult.ok()); |
| ASSERT_EQ(ENOENT, statsResult.error().code()); |
| statsResult = appUidStatsMap.readValue(TEST_UID); |
| ASSERT_FALSE(statsResult.ok()); |
| ASSERT_EQ(ENOENT, statsResult.error().code()); |
| key.tag = TEST_TAG; |
| statsResult = statsMapB.readValue(key); |
| ASSERT_FALSE(statsResult.ok()); |
| ASSERT_EQ(ENOENT, statsResult.error().code()); |
| } |
| |
| } |
| } |