1 /*
2 * Copyright (C) 2018 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
17 #include <string>
18
19 #include <fcntl.h>
20 #include <inttypes.h>
21 #include <limits.h>
22 #include <linux/inet_diag.h>
23 #include <linux/sock_diag.h>
24 #include <net/if.h>
25 #include <sys/socket.h>
26 #include <sys/types.h>
27 #include <unistd.h>
28
29 #include <gtest/gtest.h>
30
31 #include <cutils/qtaguid.h>
32
33 #include <android-base/stringprintf.h>
34 #include <android-base/strings.h>
35
36 #include "bpf/BpfMap.h"
37 #include "bpf/BpfUtils.h"
38
39 using namespace android::bpf;
40
41 using android::base::unique_fd;
42 using android::netdutils::status::ok;
43 using android::netdutils::StatusOr;
44
45 namespace android {
46 namespace bpf {
47
48 // Use the upper limit of uid to avoid conflict with real app uids. We can't use UID_MAX because
49 // it's -1, which is INVALID_UID.
50 constexpr uid_t TEST_UID = UID_MAX - 1;
51 constexpr uint32_t TEST_TAG = 42;
52 constexpr int TEST_COUNTERSET = 1;
53 constexpr int DEFAULT_COUNTERSET = 0;
54
55 class BpfBasicTest : public testing::Test {
56 protected:
BpfBasicTest()57 BpfBasicTest() {}
58 };
59
TEST_F(BpfBasicTest,TestCgroupMounted)60 TEST_F(BpfBasicTest, TestCgroupMounted) {
61 SKIP_IF_BPF_NOT_SUPPORTED;
62
63 ASSERT_EQ(0, access(CGROUP_ROOT_PATH, R_OK));
64 ASSERT_EQ(0, access("/dev/cg2_bpf/cgroup.controllers", R_OK));
65 }
66
TEST_F(BpfBasicTest,TestTrafficControllerSetUp)67 TEST_F(BpfBasicTest, TestTrafficControllerSetUp) {
68 SKIP_IF_BPF_NOT_SUPPORTED;
69
70 ASSERT_EQ(0, access(BPF_EGRESS_PROG_PATH, R_OK));
71 ASSERT_EQ(0, access(BPF_INGRESS_PROG_PATH, R_OK));
72 ASSERT_EQ(0, access(XT_BPF_INGRESS_PROG_PATH, R_OK));
73 ASSERT_EQ(0, access(XT_BPF_EGRESS_PROG_PATH, R_OK));
74 ASSERT_EQ(0, access(COOKIE_TAG_MAP_PATH, R_OK));
75 ASSERT_EQ(0, access(UID_COUNTERSET_MAP_PATH, R_OK));
76 ASSERT_EQ(0, access(UID_STATS_MAP_PATH, R_OK));
77 ASSERT_EQ(0, access(TAG_STATS_MAP_PATH, R_OK));
78 ASSERT_EQ(0, access(IFACE_INDEX_NAME_MAP_PATH, R_OK));
79 ASSERT_EQ(0, access(IFACE_STATS_MAP_PATH, R_OK));
80 ASSERT_EQ(0, access(DOZABLE_UID_MAP_PATH, R_OK));
81 ASSERT_EQ(0, access(STANDBY_UID_MAP_PATH, R_OK));
82 ASSERT_EQ(0, access(POWERSAVE_UID_MAP_PATH, R_OK));
83 }
84
TEST_F(BpfBasicTest,TestTagSocket)85 TEST_F(BpfBasicTest, TestTagSocket) {
86 SKIP_IF_BPF_NOT_SUPPORTED;
87
88 BpfMap<uint64_t, UidTag> cookieTagMap(mapRetrieve(COOKIE_TAG_MAP_PATH, 0));
89 ASSERT_LE(0, cookieTagMap.getMap());
90 int sock = socket(AF_INET6, SOCK_STREAM, 0);
91 ASSERT_LE(0, sock);
92 uint64_t cookie = getSocketCookie(sock);
93 ASSERT_NE(NONEXISTENT_COOKIE, cookie);
94 ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
95 StatusOr<UidTag> tagResult = cookieTagMap.readValue(cookie);
96 ASSERT_TRUE(isOk(tagResult));
97 ASSERT_EQ(TEST_UID, tagResult.value().uid);
98 ASSERT_EQ(TEST_TAG, tagResult.value().tag);
99 ASSERT_EQ(0, qtaguid_untagSocket(sock));
100 tagResult = cookieTagMap.readValue(cookie);
101 ASSERT_FALSE(isOk(tagResult));
102 ASSERT_EQ(ENOENT, tagResult.status().code());
103 }
104
TEST_F(BpfBasicTest,TestCloseSocketWithoutUntag)105 TEST_F(BpfBasicTest, TestCloseSocketWithoutUntag) {
106 SKIP_IF_BPF_NOT_SUPPORTED;
107
108 BpfMap<uint64_t, UidTag> cookieTagMap(mapRetrieve(COOKIE_TAG_MAP_PATH, 0));
109 ASSERT_LE(0, cookieTagMap.getMap());
110 int sock = socket(AF_INET6, SOCK_STREAM, 0);
111 ASSERT_LE(0, sock);
112 uint64_t cookie = getSocketCookie(sock);
113 ASSERT_NE(NONEXISTENT_COOKIE, cookie);
114 ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
115 StatusOr<UidTag> tagResult = cookieTagMap.readValue(cookie);
116 ASSERT_TRUE(isOk(tagResult));
117 ASSERT_EQ(TEST_UID, tagResult.value().uid);
118 ASSERT_EQ(TEST_TAG, tagResult.value().tag);
119 ASSERT_EQ(0, close(sock));
120 // Check map periodically until sk destroy handler have done its job.
121 for (int i = 0; i < 10; i++) {
122 tagResult = cookieTagMap.readValue(cookie);
123 if (!isOk(tagResult)) {
124 ASSERT_EQ(ENOENT, tagResult.status().code());
125 return;
126 }
127 usleep(50);
128 }
129 FAIL() << "socket tag still exist after 500ms";
130 }
131
TEST_F(BpfBasicTest,TestChangeCounterSet)132 TEST_F(BpfBasicTest, TestChangeCounterSet) {
133 SKIP_IF_BPF_NOT_SUPPORTED;
134
135 BpfMap<uint32_t, uint8_t> uidCounterSetMap(mapRetrieve(UID_COUNTERSET_MAP_PATH, 0));
136 ASSERT_LE(0, uidCounterSetMap.getMap());
137 ASSERT_EQ(0, qtaguid_setCounterSet(TEST_COUNTERSET, TEST_UID));
138 uid_t uid = TEST_UID;
139 StatusOr<uint8_t> counterSetResult = uidCounterSetMap.readValue(uid);
140 ASSERT_TRUE(isOk(counterSetResult));
141 ASSERT_EQ(TEST_COUNTERSET, counterSetResult.value());
142 ASSERT_EQ(0, qtaguid_setCounterSet(DEFAULT_COUNTERSET, TEST_UID));
143 counterSetResult = uidCounterSetMap.readValue(uid);
144 ASSERT_FALSE(isOk(counterSetResult));
145 ASSERT_EQ(ENOENT, counterSetResult.status().code());
146 }
147
TEST_F(BpfBasicTest,TestDeleteTagData)148 TEST_F(BpfBasicTest, TestDeleteTagData) {
149 SKIP_IF_BPF_NOT_SUPPORTED;
150
151 BpfMap<StatsKey, StatsValue> uidStatsMap(mapRetrieve(UID_STATS_MAP_PATH, 0));
152 ASSERT_LE(0, uidStatsMap.getMap());
153 BpfMap<StatsKey, StatsValue> tagStatsMap(mapRetrieve(TAG_STATS_MAP_PATH, 0));
154 ASSERT_LE(0, tagStatsMap.getMap());
155 BpfMap<uint32_t, StatsValue> appUidStatsMap(mapRetrieve(APP_UID_STATS_MAP_PATH, 0));
156 ASSERT_LE(0, appUidStatsMap.getMap());
157
158 StatsKey key = {.uid = TEST_UID, .tag = TEST_TAG, .counterSet = TEST_COUNTERSET,
159 .ifaceIndex = 1};
160 StatsValue statsMapValue = {.rxPackets = 1, .rxBytes = 100};
161 EXPECT_TRUE(isOk(tagStatsMap.writeValue(key, statsMapValue, BPF_ANY)));
162 key.tag = 0;
163 EXPECT_TRUE(isOk(uidStatsMap.writeValue(key, statsMapValue, BPF_ANY)));
164 EXPECT_TRUE(isOk(appUidStatsMap.writeValue(TEST_UID, statsMapValue, BPF_ANY)));
165 ASSERT_EQ(0, qtaguid_deleteTagData(0, TEST_UID));
166 StatusOr<StatsValue> statsResult = uidStatsMap.readValue(key);
167 ASSERT_FALSE(isOk(statsResult));
168 ASSERT_EQ(ENOENT, statsResult.status().code());
169 statsResult = appUidStatsMap.readValue(TEST_UID);
170 ASSERT_FALSE(isOk(statsResult));
171 ASSERT_EQ(ENOENT, statsResult.status().code());
172 key.tag = TEST_TAG;
173 statsResult = tagStatsMap.readValue(key);
174 ASSERT_FALSE(isOk(statsResult));
175 ASSERT_EQ(ENOENT, statsResult.status().code());
176 }
177
178 }
179 }
180