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 #include <netdutils/NetNativeTestBase.h>
36
37 #include "bpf/BpfMap.h"
38 #include "bpf/BpfUtils.h"
39 #include "netd.h"
40
41 using android::base::Result;
42
43 namespace android {
44 namespace bpf {
45
46 // Use the upper limit of uid to avoid conflict with real app uids. We can't use UID_MAX because
47 // it's -1, which is INVALID_UID.
48 constexpr uid_t TEST_UID = UID_MAX - 1;
49 constexpr uint32_t TEST_TAG = 42;
50
51 class BpfBasicTest : public NetNativeTestBase {
52 protected:
BpfBasicTest()53 BpfBasicTest() {}
54 };
55
TEST_F(BpfBasicTest,TestTagSocket)56 TEST_F(BpfBasicTest, TestTagSocket) {
57 BpfMap<uint64_t, UidTagValue> cookieTagMap(COOKIE_TAG_MAP_PATH);
58 ASSERT_TRUE(cookieTagMap.isValid());
59 int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
60 ASSERT_LE(0, sock);
61 uint64_t cookie = getSocketCookie(sock);
62 ASSERT_NE(NONEXISTENT_COOKIE, cookie);
63 ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
64 Result<UidTagValue> tagResult = cookieTagMap.readValue(cookie);
65 ASSERT_RESULT_OK(tagResult);
66 ASSERT_EQ(TEST_UID, tagResult.value().uid);
67 ASSERT_EQ(TEST_TAG, tagResult.value().tag);
68 ASSERT_EQ(0, qtaguid_untagSocket(sock));
69 tagResult = cookieTagMap.readValue(cookie);
70 ASSERT_FALSE(tagResult.ok());
71 ASSERT_EQ(ENOENT, tagResult.error().code());
72 }
73
TEST_F(BpfBasicTest,TestCloseSocketWithoutUntag)74 TEST_F(BpfBasicTest, TestCloseSocketWithoutUntag) {
75 BpfMap<uint64_t, UidTagValue> cookieTagMap(COOKIE_TAG_MAP_PATH);
76 ASSERT_TRUE(cookieTagMap.isValid());
77 int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
78 ASSERT_LE(0, sock);
79 uint64_t cookie = getSocketCookie(sock);
80 ASSERT_NE(NONEXISTENT_COOKIE, cookie);
81 ASSERT_EQ(0, qtaguid_tagSocket(sock, TEST_TAG, TEST_UID));
82 Result<UidTagValue> tagResult = cookieTagMap.readValue(cookie);
83 ASSERT_RESULT_OK(tagResult);
84 ASSERT_EQ(TEST_UID, tagResult.value().uid);
85 ASSERT_EQ(TEST_TAG, tagResult.value().tag);
86 ASSERT_EQ(0, close(sock));
87 // Check map periodically until sk destroy handler have done its job.
88 for (int i = 0; i < 1000; i++) {
89 usleep(5000); // 5ms
90 tagResult = cookieTagMap.readValue(cookie);
91 if (!tagResult.ok()) {
92 ASSERT_EQ(ENOENT, tagResult.error().code());
93 return;
94 }
95 }
96 FAIL() << "socket tag still exist after 5s";
97 }
98
99 }
100 }
101