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194 lines
7.2 KiB
194 lines
7.2 KiB
/* |
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* Copyright (C) 2018 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <string> |
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#include <fcntl.h> |
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#include <inttypes.h> |
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#include <limits.h> |
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#include <linux/inet_diag.h> |
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#include <linux/sock_diag.h> |
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#include <net/if.h> |
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#include <sys/socket.h> |
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#include <sys/types.h> |
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#include <unistd.h> |
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#include <gtest/gtest.h> |
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#include <cutils/qtaguid.h> |
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#include <processgroup/processgroup.h> |
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#include <android-base/stringprintf.h> |
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#include <android-base/strings.h> |
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#include "bpf/BpfMap.h" |
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#include "bpf/BpfUtils.h" |
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#include "netdbpf/bpf_shared.h" |
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using android::netdutils::StatusOr; |
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namespace android { |
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namespace bpf { |
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// Use the upper limit of uid to avoid conflict with real app uids. We can't use UID_MAX because |
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// it's -1, which is INVALID_UID. |
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constexpr uid_t TEST_UID = UID_MAX - 1; |
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constexpr uint32_t TEST_TAG = 42; |
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constexpr int TEST_COUNTERSET = 1; |
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constexpr int DEFAULT_COUNTERSET = 0; |
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#define SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED \ |
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do { \ |
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if (android::bpf::getBpfSupportLevel() != android::bpf::BpfLevel::EXTENDED) { \ |
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GTEST_LOG_(INFO) << "This test is skipped since extended bpf feature" \ |
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<< "not supported\n"; \ |
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return; \ |
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} \ |
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} while (0) |
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class BpfBasicTest : public testing::Test { |
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protected: |
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BpfBasicTest() {} |
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}; |
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TEST_F(BpfBasicTest, TestCgroupMounted) { |
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SKIP_IF_BPF_NOT_SUPPORTED; |
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std::string cg2_path; |
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ASSERT_EQ(true, CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &cg2_path)); |
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ASSERT_EQ(0, access(cg2_path.c_str(), R_OK)); |
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ASSERT_EQ(0, access((cg2_path + "/cgroup.controllers").c_str(), R_OK)); |
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} |
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TEST_F(BpfBasicTest, TestTrafficControllerSetUp) { |
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SKIP_IF_BPF_NOT_SUPPORTED; |
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ASSERT_EQ(0, access(BPF_EGRESS_PROG_PATH, R_OK)); |
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ASSERT_EQ(0, access(BPF_INGRESS_PROG_PATH, R_OK)); |
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ASSERT_EQ(0, access(XT_BPF_INGRESS_PROG_PATH, R_OK)); |
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ASSERT_EQ(0, access(XT_BPF_EGRESS_PROG_PATH, R_OK)); |
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ASSERT_EQ(0, access(COOKIE_TAG_MAP_PATH, R_OK)); |
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ASSERT_EQ(0, access(UID_COUNTERSET_MAP_PATH, R_OK)); |
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ASSERT_EQ(0, access(STATS_MAP_A_PATH, R_OK)); |
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ASSERT_EQ(0, access(STATS_MAP_B_PATH, R_OK)); |
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ASSERT_EQ(0, access(IFACE_INDEX_NAME_MAP_PATH, R_OK)); |
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ASSERT_EQ(0, access(IFACE_STATS_MAP_PATH, R_OK)); |
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ASSERT_EQ(0, access(CONFIGURATION_MAP_PATH, R_OK)); |
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ASSERT_EQ(0, access(UID_OWNER_MAP_PATH, R_OK)); |
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} |
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TEST_F(BpfBasicTest, TestSocketFilterSetUp) { |
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SKIP_IF_EXTENDED_BPF_NOT_SUPPORTED; |
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ASSERT_EQ(0, access(CGROUP_SOCKET_PROG_PATH, R_OK)); |
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ASSERT_EQ(0, access(UID_PERMISSION_MAP_PATH, R_OK)); |
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} |
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TEST_F(BpfBasicTest, TestTagSocket) { |
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SKIP_IF_BPF_NOT_SUPPORTED; |
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BpfMap<uint64_t, UidTag> cookieTagMap(mapRetrieve(COOKIE_TAG_MAP_PATH, 0)); |
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ASSERT_LE(0, cookieTagMap.getMap()); |
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int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0); |
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ASSERT_LE(0, sock); |
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uint64_t cookie = getSocketCookie(sock); |
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ASSERT_NE(NONEXISTENT_COOKIE, cookie); |
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ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID)); |
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StatusOr<UidTag> tagResult = cookieTagMap.readValue(cookie); |
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ASSERT_TRUE(isOk(tagResult)); |
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ASSERT_EQ(TEST_UID, tagResult.value().uid); |
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ASSERT_EQ(TEST_TAG, tagResult.value().tag); |
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ASSERT_EQ(0, qtaguid_untagSocket(sock)); |
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tagResult = cookieTagMap.readValue(cookie); |
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ASSERT_FALSE(isOk(tagResult)); |
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ASSERT_EQ(ENOENT, tagResult.status().code()); |
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} |
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TEST_F(BpfBasicTest, TestCloseSocketWithoutUntag) { |
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SKIP_IF_BPF_NOT_SUPPORTED; |
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BpfMap<uint64_t, UidTag> cookieTagMap(mapRetrieve(COOKIE_TAG_MAP_PATH, 0)); |
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ASSERT_LE(0, cookieTagMap.getMap()); |
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int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0); |
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ASSERT_LE(0, sock); |
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uint64_t cookie = getSocketCookie(sock); |
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ASSERT_NE(NONEXISTENT_COOKIE, cookie); |
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ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID)); |
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StatusOr<UidTag> tagResult = cookieTagMap.readValue(cookie); |
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ASSERT_TRUE(isOk(tagResult)); |
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ASSERT_EQ(TEST_UID, tagResult.value().uid); |
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ASSERT_EQ(TEST_TAG, tagResult.value().tag); |
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ASSERT_EQ(0, close(sock)); |
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// Check map periodically until sk destroy handler have done its job. |
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for (int i = 0; i < 10; i++) { |
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usleep(5000); // 5ms |
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tagResult = cookieTagMap.readValue(cookie); |
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if (!isOk(tagResult)) { |
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ASSERT_EQ(ENOENT, tagResult.status().code()); |
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return; |
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} |
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} |
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FAIL() << "socket tag still exist after 50ms"; |
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} |
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TEST_F(BpfBasicTest, TestChangeCounterSet) { |
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SKIP_IF_BPF_NOT_SUPPORTED; |
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BpfMap<uint32_t, uint8_t> uidCounterSetMap(mapRetrieve(UID_COUNTERSET_MAP_PATH, 0)); |
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ASSERT_LE(0, uidCounterSetMap.getMap()); |
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ASSERT_EQ(0, qtaguid_setCounterSet(TEST_COUNTERSET, TEST_UID)); |
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uid_t uid = TEST_UID; |
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StatusOr<uint8_t> counterSetResult = uidCounterSetMap.readValue(uid); |
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ASSERT_TRUE(isOk(counterSetResult)); |
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ASSERT_EQ(TEST_COUNTERSET, counterSetResult.value()); |
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ASSERT_EQ(0, qtaguid_setCounterSet(DEFAULT_COUNTERSET, TEST_UID)); |
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counterSetResult = uidCounterSetMap.readValue(uid); |
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ASSERT_FALSE(isOk(counterSetResult)); |
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ASSERT_EQ(ENOENT, counterSetResult.status().code()); |
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} |
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TEST_F(BpfBasicTest, TestDeleteTagData) { |
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SKIP_IF_BPF_NOT_SUPPORTED; |
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BpfMap<StatsKey, StatsValue> statsMapA(mapRetrieve(STATS_MAP_A_PATH, 0)); |
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ASSERT_LE(0, statsMapA.getMap()); |
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BpfMap<StatsKey, StatsValue> statsMapB(mapRetrieve(STATS_MAP_B_PATH, 0)); |
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ASSERT_LE(0, statsMapB.getMap()); |
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BpfMap<uint32_t, StatsValue> appUidStatsMap(mapRetrieve(APP_UID_STATS_MAP_PATH, 0)); |
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ASSERT_LE(0, appUidStatsMap.getMap()); |
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StatsKey key = {.uid = TEST_UID, .tag = TEST_TAG, .counterSet = TEST_COUNTERSET, |
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.ifaceIndex = 1}; |
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StatsValue statsMapValue = {.rxPackets = 1, .rxBytes = 100}; |
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EXPECT_TRUE(isOk(statsMapB.writeValue(key, statsMapValue, BPF_ANY))); |
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key.tag = 0; |
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EXPECT_TRUE(isOk(statsMapA.writeValue(key, statsMapValue, BPF_ANY))); |
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EXPECT_TRUE(isOk(appUidStatsMap.writeValue(TEST_UID, statsMapValue, BPF_ANY))); |
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ASSERT_EQ(0, qtaguid_deleteTagData(0, TEST_UID)); |
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StatusOr<StatsValue> statsResult = statsMapA.readValue(key); |
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ASSERT_FALSE(isOk(statsResult)); |
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ASSERT_EQ(ENOENT, statsResult.status().code()); |
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statsResult = appUidStatsMap.readValue(TEST_UID); |
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ASSERT_FALSE(isOk(statsResult)); |
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ASSERT_EQ(ENOENT, statsResult.status().code()); |
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key.tag = TEST_TAG; |
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statsResult = statsMapB.readValue(key); |
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ASSERT_FALSE(isOk(statsResult)); |
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ASSERT_EQ(ENOENT, statsResult.status().code()); |
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} |
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} |
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}
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