1 /*
2 * Copyright (C) 2016, 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 <vector>
18
19 #include <gtest/gtest.h>
20 #include <utils/StrongPointer.h>
21 #include <wifi_system/interface_tool.h>
22
23 #include "android/net/wifi/IApInterface.h"
24 #include "android/net/wifi/IWificond.h"
25 #include "wificond/tests/integration/process_utils.h"
26
27 using android::net::wifi::IApInterface;
28 using android::net::wifi::IWificond;
29 using android::wifi_system::InterfaceTool;
30 using android::wificond::tests::integration::HostapdIsDead;
31 using android::wificond::tests::integration::HostapdIsRunning;
32 using android::wificond::tests::integration::ScopedDevModeWificond;
33 using android::wificond::tests::integration::WaitForTrue;
34 using std::string;
35 using std::vector;
36
37 namespace android {
38 namespace wificond {
39 namespace {
40
41 constexpr int kHostapdStartupTimeoutSeconds = 3;
42 constexpr int kHostapdDeathTimeoutSeconds = 3;
43
44 const char kValidSsid[] = "foobar";
45 const char kInvalidSsid[] = "0123456789"
46 "0123456789"
47 "0123456789"
48 "012"; // 33 bytes is too long
49 const char kValidPassphrase[] = "super secret";
50
51 } // namespace
52
TEST(ApInterfaceTest,CanCreateApInterfaces)53 TEST(ApInterfaceTest, CanCreateApInterfaces) {
54 ScopedDevModeWificond dev_mode;
55 sp<IWificond> service = dev_mode.EnterDevModeOrDie();
56
57 // We should be able to create an AP interface.
58 sp<IApInterface> ap_interface;
59 EXPECT_TRUE(service->createApInterface(&ap_interface).isOk());
60 EXPECT_NE(nullptr, ap_interface.get());
61
62 // The interface should start out down.
63 string if_name;
64 EXPECT_TRUE(ap_interface->getInterfaceName(&if_name).isOk());
65 EXPECT_TRUE(!if_name.empty());
66 InterfaceTool if_tool;
67 EXPECT_FALSE(if_tool.GetUpState(if_name.c_str()));
68
69 // Mark the interface as up, just to test that we mark it down on teardown.
70 EXPECT_TRUE(if_tool.SetUpState(if_name.c_str(), true));
71 EXPECT_TRUE(if_tool.GetUpState(if_name.c_str()));
72
73 // We should not be able to create two AP interfaces.
74 sp<IApInterface> ap_interface2;
75 EXPECT_TRUE(service->createApInterface(&ap_interface2).isOk());
76 EXPECT_EQ(nullptr, ap_interface2.get());
77
78 // We can tear down the created interface.
79 EXPECT_TRUE(service->tearDownInterfaces().isOk());
80 EXPECT_FALSE(if_tool.GetUpState(if_name.c_str()));
81 }
82
83 // TODO: b/30311493 this test fails because hostapd fails to set the driver
84 // channel every other time.
TEST(ApInterfaceTest,CanStartStopHostapd)85 TEST(ApInterfaceTest, CanStartStopHostapd) {
86 ScopedDevModeWificond dev_mode;
87 sp<IWificond> service = dev_mode.EnterDevModeOrDie();
88 sp<IApInterface> ap_interface;
89 EXPECT_TRUE(service->createApInterface(&ap_interface).isOk());
90 ASSERT_NE(nullptr, ap_interface.get());
91
92 // Interface should start out down.
93 string if_name;
94 EXPECT_TRUE(ap_interface->getInterfaceName(&if_name).isOk());
95 EXPECT_TRUE(!if_name.empty());
96 InterfaceTool if_tool;
97 EXPECT_FALSE(if_tool.GetUpState(if_name.c_str()));
98
99 bool wrote_config = false;
100 EXPECT_TRUE(ap_interface->writeHostapdConfig(
101 vector<uint8_t>(kValidSsid, kValidSsid + sizeof(kValidSsid) - 1),
102 false,
103 6,
104 IApInterface::ENCRYPTION_TYPE_WPA2,
105 vector<uint8_t>(kValidPassphrase,
106 kValidPassphrase + sizeof(kValidPassphrase) - 1),
107 &wrote_config).isOk());
108 ASSERT_TRUE(wrote_config);
109
110 for (int iteration = 0; iteration < 4; iteration++) {
111 bool hostapd_started = false;
112 EXPECT_TRUE(ap_interface->startHostapd(&hostapd_started).isOk());
113 EXPECT_TRUE(hostapd_started);
114
115 EXPECT_TRUE(WaitForTrue(HostapdIsRunning, kHostapdStartupTimeoutSeconds))
116 << "Failed on iteration " << iteration;
117
118 // There are two reasons to do this:
119 // 1) We look for hostapd so quickly that we miss when it dies on startup
120 // 2) If we don't give hostapd enough time to get fully up, killing it
121 // can leave the driver in a poor state.
122 // The latter points to an obvious race, where we cannot fully clean up the
123 // driver on quick transitions.
124 auto InterfaceIsUp = [&if_tool, &if_name] () {
125 return if_tool.GetUpState(if_name.c_str());
126 };
127 EXPECT_TRUE(WaitForTrue(InterfaceIsUp, kHostapdStartupTimeoutSeconds))
128 << "Failed on iteration " << iteration;
129 EXPECT_TRUE(HostapdIsRunning()) << "Failed on iteration " << iteration;
130
131 bool hostapd_stopped = false;
132 EXPECT_TRUE(ap_interface->stopHostapd(&hostapd_stopped).isOk());
133 EXPECT_TRUE(hostapd_stopped);
134 EXPECT_FALSE(if_tool.GetUpState(if_name.c_str()));
135
136
137 EXPECT_TRUE(WaitForTrue(HostapdIsDead, kHostapdDeathTimeoutSeconds))
138 << "Failed on iteration " << iteration;
139 }
140 }
141
TEST(ApInterfaceTest,CanWriteHostapdConfig)142 TEST(ApInterfaceTest, CanWriteHostapdConfig) {
143 ScopedDevModeWificond dev_mode;
144 sp<IWificond> service = dev_mode.EnterDevModeOrDie();
145 sp<IApInterface> ap_interface;
146 EXPECT_TRUE(service->createApInterface(&ap_interface).isOk());
147 ASSERT_NE(nullptr, ap_interface.get());
148
149 bool success = false;
150 // Should be able to write out a valid configuration
151 EXPECT_TRUE(ap_interface->writeHostapdConfig(
152 vector<uint8_t>(kValidSsid, kValidSsid + sizeof(kValidSsid) - 1),
153 false,
154 2,
155 IApInterface::ENCRYPTION_TYPE_WPA2,
156 vector<uint8_t>(kValidPassphrase,
157 kValidPassphrase + sizeof(kValidPassphrase) - 1),
158 &success).isOk());
159 EXPECT_TRUE(success) << "Expected to write out a valid config.";
160
161 // SSIDs have to be 32 bytes or less
162 EXPECT_TRUE(ap_interface->writeHostapdConfig(
163 vector<uint8_t>(kInvalidSsid, kInvalidSsid + sizeof(kInvalidSsid) - 1),
164 false,
165 2,
166 IApInterface::ENCRYPTION_TYPE_WPA2,
167 vector<uint8_t>(kValidPassphrase,
168 kValidPassphrase + sizeof(kValidPassphrase) - 1),
169 &success).isOk());
170 EXPECT_FALSE(success) << "Did not expect to write out an invalid config.";
171 }
172
173 } // namespace wificond
174 } // namespace android
175