1 // Copyright 2017 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "net/base/network_interfaces_win.h"
6
7 #include <iphlpapi.h>
8 #include <objbase.h>
9
10 #include <ostream>
11 #include <string>
12 #include <unordered_set>
13
14 #include "base/strings/utf_string_conversions.h"
15 #include "build/build_config.h"
16 #include "net/base/ip_endpoint.h"
17 #include "testing/gtest/include/gtest/gtest.h"
18
19 namespace net {
20
21 namespace {
22
23 static const char kIfnameEm1[] = "em1";
24 static const char kIfnameVmnet[] = "VMnet";
25
26 static const unsigned char kIPv6LocalAddr[] = {0, 0, 0, 0, 0, 0, 0, 0,
27 0, 0, 0, 0, 0, 0, 0, 1};
28
29 static const unsigned char kIPv6Addr[] = {0x24, 0x01, 0xfa, 0x00, 0x00, 0x04,
30 0x10, 0x00, 0xbe, 0x30, 0x5b, 0xff,
31 0xfe, 0xe5, 0x00, 0xc3};
32 static const unsigned char kIPv6AddrPrefix[] = {
33 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
34 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
35
36 // Helper function to create a valid IP_ADAPTER_ADDRESSES with reasonable
37 // default value. The output is the |adapter_address|. All the rests are input
38 // to fill the |adapter_address|. |sock_addrs| are temporary storage used by
39 // |adapter_address| once the function is returned.
FillAdapterAddress(IP_ADAPTER_ADDRESSES * adapter_address,const char * ifname,const IPAddress & ip_address,const IPAddress & ip_netmask,sockaddr_storage sock_addrs[2])40 bool FillAdapterAddress(IP_ADAPTER_ADDRESSES* adapter_address,
41 const char* ifname,
42 const IPAddress& ip_address,
43 const IPAddress& ip_netmask,
44 sockaddr_storage sock_addrs[2]) {
45 adapter_address->AdapterName = const_cast<char*>(ifname);
46 adapter_address->FriendlyName = const_cast<PWCHAR>(L"interface");
47 adapter_address->IfType = IF_TYPE_ETHERNET_CSMACD;
48 adapter_address->OperStatus = IfOperStatusUp;
49 adapter_address->FirstUnicastAddress->DadState = IpDadStatePreferred;
50 adapter_address->FirstUnicastAddress->PrefixOrigin = IpPrefixOriginOther;
51 adapter_address->FirstUnicastAddress->SuffixOrigin = IpSuffixOriginOther;
52 adapter_address->FirstUnicastAddress->PreferredLifetime = 100;
53 adapter_address->FirstUnicastAddress->ValidLifetime = 1000;
54
55 socklen_t sock_len = sizeof(sockaddr_storage);
56
57 // Convert to sockaddr for next check.
58 if (!IPEndPoint(ip_address, 0)
59 .ToSockAddr(reinterpret_cast<sockaddr*>(&sock_addrs[0]),
60 &sock_len)) {
61 return false;
62 }
63 adapter_address->FirstUnicastAddress->Address.lpSockaddr =
64 reinterpret_cast<sockaddr*>(&sock_addrs[0]);
65 adapter_address->FirstUnicastAddress->Address.iSockaddrLength = sock_len;
66 adapter_address->FirstUnicastAddress->OnLinkPrefixLength = 1;
67
68 sock_len = sizeof(sockaddr_storage);
69 if (!IPEndPoint(ip_netmask, 0)
70 .ToSockAddr(reinterpret_cast<sockaddr*>(&sock_addrs[1]),
71 &sock_len)) {
72 return false;
73 }
74 adapter_address->FirstPrefix->Address.lpSockaddr =
75 reinterpret_cast<sockaddr*>(&sock_addrs[1]);
76 adapter_address->FirstPrefix->Address.iSockaddrLength = sock_len;
77 adapter_address->FirstPrefix->PrefixLength = 1;
78
79 DCHECK_EQ(sock_addrs[0].ss_family, sock_addrs[1].ss_family);
80 if (sock_addrs[0].ss_family == AF_INET6) {
81 adapter_address->Ipv6IfIndex = 0;
82 } else {
83 DCHECK_EQ(sock_addrs[0].ss_family, AF_INET);
84 adapter_address->IfIndex = 0;
85 }
86
87 return true;
88 }
89
TEST(NetworkInterfacesTest,NetworkListTrimmingWindows)90 TEST(NetworkInterfacesTest, NetworkListTrimmingWindows) {
91 IPAddress ipv6_local_address(kIPv6LocalAddr);
92 IPAddress ipv6_address(kIPv6Addr);
93 IPAddress ipv6_prefix(kIPv6AddrPrefix);
94
95 NetworkInterfaceList results;
96 sockaddr_storage addresses[2];
97 IP_ADAPTER_ADDRESSES adapter_address = {};
98 IP_ADAPTER_UNICAST_ADDRESS address = {};
99 IP_ADAPTER_PREFIX adapter_prefix = {};
100 adapter_address.FirstUnicastAddress = &address;
101 adapter_address.FirstPrefix = &adapter_prefix;
102
103 // Address of offline links should be ignored.
104 ASSERT_TRUE(FillAdapterAddress(&adapter_address, kIfnameEm1, ipv6_address,
105 ipv6_prefix, addresses));
106 adapter_address.OperStatus = IfOperStatusDown;
107
108 EXPECT_TRUE(internal::GetNetworkListImpl(
109 &results, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &adapter_address));
110
111 EXPECT_EQ(results.size(), 0ul);
112
113 // Address on loopback interface should be trimmed out.
114 ASSERT_TRUE(FillAdapterAddress(
115 &adapter_address /* adapter_address */, kIfnameEm1 /* ifname */,
116 ipv6_local_address /* ip_address */, ipv6_prefix /* ip_netmask */,
117 addresses /* sock_addrs */));
118 adapter_address.IfType = IF_TYPE_SOFTWARE_LOOPBACK;
119
120 EXPECT_TRUE(internal::GetNetworkListImpl(
121 &results, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &adapter_address));
122 EXPECT_EQ(results.size(), 0ul);
123
124 // vmware address should return by default.
125 ASSERT_TRUE(FillAdapterAddress(&adapter_address, kIfnameVmnet, ipv6_address,
126 ipv6_prefix, addresses));
127 EXPECT_TRUE(internal::GetNetworkListImpl(
128 &results, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &adapter_address));
129 EXPECT_EQ(results.size(), 1ul);
130 EXPECT_EQ(results[0].name, kIfnameVmnet);
131 EXPECT_EQ(results[0].prefix_length, 1ul);
132 EXPECT_EQ(results[0].address, ipv6_address);
133 EXPECT_EQ(results[0].ip_address_attributes, IP_ADDRESS_ATTRIBUTE_NONE);
134 results.clear();
135
136 // vmware address should be trimmed out if policy specified so.
137 ASSERT_TRUE(FillAdapterAddress(&adapter_address, kIfnameVmnet, ipv6_address,
138 ipv6_prefix, addresses));
139 EXPECT_TRUE(internal::GetNetworkListImpl(
140 &results, EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &adapter_address));
141 EXPECT_EQ(results.size(), 0ul);
142 results.clear();
143
144 // Addresses with incomplete DAD should be ignored.
145 ASSERT_TRUE(FillAdapterAddress(&adapter_address, kIfnameEm1, ipv6_address,
146 ipv6_prefix, addresses));
147 adapter_address.FirstUnicastAddress->DadState = IpDadStateTentative;
148
149 EXPECT_TRUE(internal::GetNetworkListImpl(
150 &results, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &adapter_address));
151 EXPECT_EQ(results.size(), 0ul);
152 results.clear();
153
154 // Addresses with allowed attribute IpSuffixOriginRandom should be returned
155 // and attributes should be translated correctly to
156 // IP_ADDRESS_ATTRIBUTE_TEMPORARY.
157 ASSERT_TRUE(FillAdapterAddress(&adapter_address, kIfnameEm1, ipv6_address,
158 ipv6_prefix, addresses));
159 adapter_address.FirstUnicastAddress->PrefixOrigin =
160 IpPrefixOriginRouterAdvertisement;
161 adapter_address.FirstUnicastAddress->SuffixOrigin = IpSuffixOriginRandom;
162
163 EXPECT_TRUE(internal::GetNetworkListImpl(
164 &results, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &adapter_address));
165 EXPECT_EQ(results.size(), 1ul);
166 EXPECT_EQ(results[0].name, kIfnameEm1);
167 EXPECT_EQ(results[0].prefix_length, 1ul);
168 EXPECT_EQ(results[0].address, ipv6_address);
169 EXPECT_EQ(results[0].ip_address_attributes, IP_ADDRESS_ATTRIBUTE_TEMPORARY);
170 results.clear();
171
172 // Addresses with preferred lifetime 0 should be returned and
173 // attributes should be translated correctly to
174 // IP_ADDRESS_ATTRIBUTE_DEPRECATED.
175 ASSERT_TRUE(FillAdapterAddress(&adapter_address, kIfnameEm1, ipv6_address,
176 ipv6_prefix, addresses));
177 adapter_address.FirstUnicastAddress->PreferredLifetime = 0;
178 adapter_address.FriendlyName = const_cast<PWCHAR>(L"FriendlyInterfaceName");
179 EXPECT_TRUE(internal::GetNetworkListImpl(
180 &results, INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &adapter_address));
181 EXPECT_EQ(results.size(), 1ul);
182 EXPECT_EQ(results[0].friendly_name, "FriendlyInterfaceName");
183 EXPECT_EQ(results[0].name, kIfnameEm1);
184 EXPECT_EQ(results[0].prefix_length, 1ul);
185 EXPECT_EQ(results[0].address, ipv6_address);
186 EXPECT_EQ(results[0].ip_address_attributes, IP_ADDRESS_ATTRIBUTE_DEPRECATED);
187 results.clear();
188 }
189
read_int_or_bool(DWORD data_size,PVOID data)190 bool read_int_or_bool(DWORD data_size, PVOID data) {
191 switch (data_size) {
192 case 1:
193 return !!*reinterpret_cast<uint8_t*>(data);
194 case 4:
195 return !!*reinterpret_cast<uint32_t*>(data);
196 default:
197 LOG(FATAL) << "That is not a type I know!";
198 return false;
199 }
200 }
201
GetWifiOptions()202 int GetWifiOptions() {
203 const internal::WlanApi& wlanapi = internal::WlanApi::GetInstance();
204 if (!wlanapi.initialized)
205 return -1;
206
207 internal::WlanHandle client;
208 DWORD cur_version = 0;
209 const DWORD kMaxClientVersion = 2;
210 DWORD result = wlanapi.OpenHandle(kMaxClientVersion, &cur_version, &client);
211 if (result != ERROR_SUCCESS)
212 return -1;
213
214 WLAN_INTERFACE_INFO_LIST* interface_list_ptr = nullptr;
215 result =
216 wlanapi.enum_interfaces_func(client.Get(), nullptr, &interface_list_ptr);
217 if (result != ERROR_SUCCESS)
218 return -1;
219 std::unique_ptr<WLAN_INTERFACE_INFO_LIST, internal::WlanApiDeleter>
220 interface_list(interface_list_ptr);
221
222 for (unsigned i = 0; i < interface_list->dwNumberOfItems; ++i) {
223 WLAN_INTERFACE_INFO* info = &interface_list->InterfaceInfo[i];
224 DWORD data_size;
225 PVOID data;
226 int options = 0;
227 result =
228 wlanapi.query_interface_func(client.Get(), &info->InterfaceGuid,
229 wlan_intf_opcode_background_scan_enabled,
230 nullptr, &data_size, &data, nullptr);
231 if (result != ERROR_SUCCESS)
232 continue;
233 if (!read_int_or_bool(data_size, data)) {
234 options |= WIFI_OPTIONS_DISABLE_SCAN;
235 }
236 internal::WlanApi::GetInstance().free_memory_func(data);
237
238 result = wlanapi.query_interface_func(client.Get(), &info->InterfaceGuid,
239 wlan_intf_opcode_media_streaming_mode,
240 nullptr, &data_size, &data, nullptr);
241 if (result != ERROR_SUCCESS)
242 continue;
243 if (read_int_or_bool(data_size, data)) {
244 options |= WIFI_OPTIONS_MEDIA_STREAMING_MODE;
245 }
246 internal::WlanApi::GetInstance().free_memory_func(data);
247
248 // Just the the options from the first succesful
249 // interface.
250 return options;
251 }
252
253 // No wifi interface found.
254 return -1;
255 }
256
TryChangeWifiOptions(int options)257 void TryChangeWifiOptions(int options) {
258 int previous_options = GetWifiOptions();
259 std::unique_ptr<ScopedWifiOptions> scoped_options = SetWifiOptions(options);
260 EXPECT_EQ(previous_options | options, GetWifiOptions());
261 scoped_options.reset();
262 EXPECT_EQ(previous_options, GetWifiOptions());
263 }
264
265 // Test SetWifiOptions().
TEST(NetworkInterfacesTest,SetWifiOptions)266 TEST(NetworkInterfacesTest, SetWifiOptions) {
267 TryChangeWifiOptions(0);
268 TryChangeWifiOptions(WIFI_OPTIONS_DISABLE_SCAN);
269 TryChangeWifiOptions(WIFI_OPTIONS_MEDIA_STREAMING_MODE);
270 TryChangeWifiOptions(WIFI_OPTIONS_DISABLE_SCAN |
271 WIFI_OPTIONS_MEDIA_STREAMING_MODE);
272 }
273
274 } // namespace
275
276 } // namespace net
277