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 #include "wificond/tests/mock_ap_interface_event_callback.h"
27
28 using android::net::wifi::IApInterface;
29 using android::net::wifi::IWificond;
30 using android::wifi_system::InterfaceTool;
31 using android::wificond::MockApInterfaceEventCallback;
32 using android::wificond::tests::integration::HostapdIsDead;
33 using android::wificond::tests::integration::HostapdIsRunning;
34 using android::wificond::tests::integration::ScopedDevModeWificond;
35 using android::wificond::tests::integration::WaitForTrue;
36 using std::string;
37 using std::vector;
38
39 namespace android {
40 namespace wificond {
41 namespace {
42 const char kInterfaceName[] = "wlan0";
43 constexpr int kHostapdStartupTimeoutSeconds = 3;
44 constexpr int kHostapdDeathTimeoutSeconds = 3;
45 } // namespace
46
TEST(ApInterfaceTest,CanCreateApInterfaces)47 TEST(ApInterfaceTest, CanCreateApInterfaces) {
48 ScopedDevModeWificond dev_mode;
49 sp<IWificond> service = dev_mode.EnterDevModeOrDie();
50
51 // We should be able to create an AP interface.
52 sp<IApInterface> ap_interface;
53 EXPECT_TRUE(service->createApInterface(kInterfaceName, &ap_interface).isOk());
54 EXPECT_NE(nullptr, ap_interface.get());
55
56 // The interface should start out down.
57 string if_name;
58 EXPECT_TRUE(ap_interface->getInterfaceName(&if_name).isOk());
59 EXPECT_TRUE(!if_name.empty());
60 InterfaceTool if_tool;
61 EXPECT_FALSE(if_tool.GetUpState(if_name.c_str()));
62
63 // Mark the interface as up, just to test that we mark it down on tearDown.
64 EXPECT_TRUE(if_tool.SetUpState(if_name.c_str(), true));
65 EXPECT_TRUE(if_tool.GetUpState(if_name.c_str()));
66
67 // We should not be able to create two AP interfaces.
68 sp<IApInterface> ap_interface2;
69 EXPECT_TRUE(service->createApInterface(
70 kInterfaceName, &ap_interface2).isOk());
71 EXPECT_EQ(nullptr, ap_interface2.get());
72
73 // We can tear down the created interface.
74 bool success = false;
75 EXPECT_TRUE(service->tearDownApInterface(kInterfaceName, &success).isOk());
76 EXPECT_TRUE(success);
77 EXPECT_FALSE(if_tool.GetUpState(if_name.c_str()));
78
79 // Teardown everything at the end of the test.
80 EXPECT_TRUE(service->tearDownInterfaces().isOk());
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(kInterfaceName, &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 sp<MockApInterfaceEventCallback> ap_interface_event_callback(
100 new MockApInterfaceEventCallback());
101
102 for (int iteration = 0; iteration < 4; iteration++) {
103 bool hostapd_started = false;
104 EXPECT_TRUE(
105 ap_interface
106 ->startHostapd(ap_interface_event_callback, &hostapd_started)
107 .isOk());
108 EXPECT_TRUE(hostapd_started);
109
110 EXPECT_TRUE(WaitForTrue(HostapdIsRunning, kHostapdStartupTimeoutSeconds))
111 << "Failed on iteration " << iteration;
112
113 // There are two reasons to do this:
114 // 1) We look for hostapd so quickly that we miss when it dies on startup
115 // 2) If we don't give hostapd enough time to get fully up, killing it
116 // can leave the driver in a poor state.
117 // The latter points to an obvious race, where we cannot fully clean up the
118 // driver on quick transitions.
119 auto InterfaceIsUp = [&if_tool, &if_name] () {
120 return if_tool.GetUpState(if_name.c_str());
121 };
122 EXPECT_TRUE(WaitForTrue(InterfaceIsUp, kHostapdStartupTimeoutSeconds))
123 << "Failed on iteration " << iteration;
124 EXPECT_TRUE(HostapdIsRunning()) << "Failed on iteration " << iteration;
125
126 bool hostapd_stopped = false;
127 EXPECT_TRUE(ap_interface->stopHostapd(&hostapd_stopped).isOk());
128 EXPECT_TRUE(hostapd_stopped);
129 EXPECT_FALSE(if_tool.GetUpState(if_name.c_str()));
130
131
132 EXPECT_TRUE(WaitForTrue(HostapdIsDead, kHostapdDeathTimeoutSeconds))
133 << "Failed on iteration " << iteration;
134 }
135 }
136 } // namespace wificond
137 } // namespace android
138