henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include <string> |
| 12 | |
| 13 | #include "webrtc/base/gunit.h" |
| 14 | #include "webrtc/base/logging.h" |
| 15 | #include "webrtc/base/natserver.h" |
| 16 | #include "webrtc/base/natsocketfactory.h" |
| 17 | #include "webrtc/base/nethelpers.h" |
| 18 | #include "webrtc/base/network.h" |
| 19 | #include "webrtc/base/physicalsocketserver.h" |
| 20 | #include "webrtc/base/testclient.h" |
| 21 | #include "webrtc/base/virtualsocketserver.h" |
| 22 | |
| 23 | using namespace rtc; |
| 24 | |
| 25 | bool CheckReceive( |
| 26 | TestClient* client, bool should_receive, const char* buf, size_t size) { |
| 27 | return (should_receive) ? |
| 28 | client->CheckNextPacket(buf, size, 0) : |
| 29 | client->CheckNoPacket(); |
| 30 | } |
| 31 | |
| 32 | TestClient* CreateTestClient( |
| 33 | SocketFactory* factory, const SocketAddress& local_addr) { |
| 34 | AsyncUDPSocket* socket = AsyncUDPSocket::Create(factory, local_addr); |
| 35 | return new TestClient(socket); |
| 36 | } |
| 37 | |
| 38 | // Tests that when sending from internal_addr to external_addrs through the |
| 39 | // NAT type specified by nat_type, all external addrs receive the sent packet |
| 40 | // and, if exp_same is true, all use the same mapped-address on the NAT. |
| 41 | void TestSend( |
| 42 | SocketServer* internal, const SocketAddress& internal_addr, |
| 43 | SocketServer* external, const SocketAddress external_addrs[4], |
| 44 | NATType nat_type, bool exp_same) { |
| 45 | Thread th_int(internal); |
| 46 | Thread th_ext(external); |
| 47 | |
| 48 | SocketAddress server_addr = internal_addr; |
| 49 | server_addr.SetPort(0); // Auto-select a port |
| 50 | NATServer* nat = new NATServer( |
| 51 | nat_type, internal, server_addr, external, external_addrs[0]); |
| 52 | NATSocketFactory* natsf = new NATSocketFactory(internal, |
| 53 | nat->internal_address()); |
| 54 | |
| 55 | TestClient* in = CreateTestClient(natsf, internal_addr); |
| 56 | TestClient* out[4]; |
| 57 | for (int i = 0; i < 4; i++) |
| 58 | out[i] = CreateTestClient(external, external_addrs[i]); |
| 59 | |
| 60 | th_int.Start(); |
| 61 | th_ext.Start(); |
| 62 | |
| 63 | const char* buf = "filter_test"; |
| 64 | size_t len = strlen(buf); |
| 65 | |
| 66 | in->SendTo(buf, len, out[0]->address()); |
| 67 | SocketAddress trans_addr; |
| 68 | EXPECT_TRUE(out[0]->CheckNextPacket(buf, len, &trans_addr)); |
| 69 | |
| 70 | for (int i = 1; i < 4; i++) { |
| 71 | in->SendTo(buf, len, out[i]->address()); |
| 72 | SocketAddress trans_addr2; |
| 73 | EXPECT_TRUE(out[i]->CheckNextPacket(buf, len, &trans_addr2)); |
| 74 | bool are_same = (trans_addr == trans_addr2); |
| 75 | ASSERT_EQ(are_same, exp_same) << "same translated address"; |
| 76 | ASSERT_NE(AF_UNSPEC, trans_addr.family()); |
| 77 | ASSERT_NE(AF_UNSPEC, trans_addr2.family()); |
| 78 | } |
| 79 | |
| 80 | th_int.Stop(); |
| 81 | th_ext.Stop(); |
| 82 | |
| 83 | delete nat; |
| 84 | delete natsf; |
| 85 | delete in; |
| 86 | for (int i = 0; i < 4; i++) |
| 87 | delete out[i]; |
| 88 | } |
| 89 | |
| 90 | // Tests that when sending from external_addrs to internal_addr, the packet |
| 91 | // is delivered according to the specified filter_ip and filter_port rules. |
| 92 | void TestRecv( |
| 93 | SocketServer* internal, const SocketAddress& internal_addr, |
| 94 | SocketServer* external, const SocketAddress external_addrs[4], |
| 95 | NATType nat_type, bool filter_ip, bool filter_port) { |
| 96 | Thread th_int(internal); |
| 97 | Thread th_ext(external); |
| 98 | |
| 99 | SocketAddress server_addr = internal_addr; |
| 100 | server_addr.SetPort(0); // Auto-select a port |
| 101 | NATServer* nat = new NATServer( |
| 102 | nat_type, internal, server_addr, external, external_addrs[0]); |
| 103 | NATSocketFactory* natsf = new NATSocketFactory(internal, |
| 104 | nat->internal_address()); |
| 105 | |
| 106 | TestClient* in = CreateTestClient(natsf, internal_addr); |
| 107 | TestClient* out[4]; |
| 108 | for (int i = 0; i < 4; i++) |
| 109 | out[i] = CreateTestClient(external, external_addrs[i]); |
| 110 | |
| 111 | th_int.Start(); |
| 112 | th_ext.Start(); |
| 113 | |
| 114 | const char* buf = "filter_test"; |
| 115 | size_t len = strlen(buf); |
| 116 | |
| 117 | in->SendTo(buf, len, out[0]->address()); |
| 118 | SocketAddress trans_addr; |
| 119 | EXPECT_TRUE(out[0]->CheckNextPacket(buf, len, &trans_addr)); |
| 120 | |
| 121 | out[1]->SendTo(buf, len, trans_addr); |
| 122 | EXPECT_TRUE(CheckReceive(in, !filter_ip, buf, len)); |
| 123 | |
| 124 | out[2]->SendTo(buf, len, trans_addr); |
| 125 | EXPECT_TRUE(CheckReceive(in, !filter_port, buf, len)); |
| 126 | |
| 127 | out[3]->SendTo(buf, len, trans_addr); |
| 128 | EXPECT_TRUE(CheckReceive(in, !filter_ip && !filter_port, buf, len)); |
| 129 | |
| 130 | th_int.Stop(); |
| 131 | th_ext.Stop(); |
| 132 | |
| 133 | delete nat; |
| 134 | delete natsf; |
| 135 | delete in; |
| 136 | for (int i = 0; i < 4; i++) |
| 137 | delete out[i]; |
| 138 | } |
| 139 | |
| 140 | // Tests that NATServer allocates bindings properly. |
| 141 | void TestBindings( |
| 142 | SocketServer* internal, const SocketAddress& internal_addr, |
| 143 | SocketServer* external, const SocketAddress external_addrs[4]) { |
| 144 | TestSend(internal, internal_addr, external, external_addrs, |
| 145 | NAT_OPEN_CONE, true); |
| 146 | TestSend(internal, internal_addr, external, external_addrs, |
| 147 | NAT_ADDR_RESTRICTED, true); |
| 148 | TestSend(internal, internal_addr, external, external_addrs, |
| 149 | NAT_PORT_RESTRICTED, true); |
| 150 | TestSend(internal, internal_addr, external, external_addrs, |
| 151 | NAT_SYMMETRIC, false); |
| 152 | } |
| 153 | |
| 154 | // Tests that NATServer filters packets properly. |
| 155 | void TestFilters( |
| 156 | SocketServer* internal, const SocketAddress& internal_addr, |
| 157 | SocketServer* external, const SocketAddress external_addrs[4]) { |
| 158 | TestRecv(internal, internal_addr, external, external_addrs, |
| 159 | NAT_OPEN_CONE, false, false); |
| 160 | TestRecv(internal, internal_addr, external, external_addrs, |
| 161 | NAT_ADDR_RESTRICTED, true, false); |
| 162 | TestRecv(internal, internal_addr, external, external_addrs, |
| 163 | NAT_PORT_RESTRICTED, true, true); |
| 164 | TestRecv(internal, internal_addr, external, external_addrs, |
| 165 | NAT_SYMMETRIC, true, true); |
| 166 | } |
| 167 | |
| 168 | bool TestConnectivity(const SocketAddress& src, const IPAddress& dst) { |
| 169 | // The physical NAT tests require connectivity to the selected ip from the |
| 170 | // internal address used for the NAT. Things like firewalls can break that, so |
| 171 | // check to see if it's worth even trying with this ip. |
| 172 | scoped_ptr<PhysicalSocketServer> pss(new PhysicalSocketServer()); |
| 173 | scoped_ptr<AsyncSocket> client(pss->CreateAsyncSocket(src.family(), |
| 174 | SOCK_DGRAM)); |
| 175 | scoped_ptr<AsyncSocket> server(pss->CreateAsyncSocket(src.family(), |
| 176 | SOCK_DGRAM)); |
| 177 | if (client->Bind(SocketAddress(src.ipaddr(), 0)) != 0 || |
| 178 | server->Bind(SocketAddress(dst, 0)) != 0) { |
| 179 | return false; |
| 180 | } |
| 181 | const char* buf = "hello other socket"; |
| 182 | size_t len = strlen(buf); |
| 183 | int sent = client->SendTo(buf, len, server->GetLocalAddress()); |
| 184 | SocketAddress addr; |
| 185 | const size_t kRecvBufSize = 64; |
| 186 | char recvbuf[kRecvBufSize]; |
| 187 | Thread::Current()->SleepMs(100); |
| 188 | int received = server->RecvFrom(recvbuf, kRecvBufSize, &addr); |
| 189 | return received == sent && ::memcmp(buf, recvbuf, len) == 0; |
| 190 | } |
| 191 | |
| 192 | void TestPhysicalInternal(const SocketAddress& int_addr) { |
| 193 | BasicNetworkManager network_manager; |
| 194 | network_manager.set_ipv6_enabled(true); |
| 195 | network_manager.StartUpdating(); |
| 196 | // Process pending messages so the network list is updated. |
| 197 | Thread::Current()->ProcessMessages(0); |
| 198 | |
| 199 | std::vector<Network*> networks; |
| 200 | network_manager.GetNetworks(&networks); |
| 201 | if (networks.empty()) { |
| 202 | LOG(LS_WARNING) << "Not enough network adapters for test."; |
| 203 | return; |
| 204 | } |
| 205 | |
| 206 | SocketAddress ext_addr1(int_addr); |
| 207 | SocketAddress ext_addr2; |
| 208 | // Find an available IP with matching family. The test breaks if int_addr |
| 209 | // can't talk to ip, so check for connectivity as well. |
| 210 | for (std::vector<Network*>::iterator it = networks.begin(); |
| 211 | it != networks.end(); ++it) { |
| 212 | const IPAddress& ip = (*it)->ip(); |
| 213 | if (ip.family() == int_addr.family() && TestConnectivity(int_addr, ip)) { |
| 214 | ext_addr2.SetIP(ip); |
| 215 | break; |
| 216 | } |
| 217 | } |
| 218 | if (ext_addr2.IsNil()) { |
| 219 | LOG(LS_WARNING) << "No available IP of same family as " << int_addr; |
| 220 | return; |
| 221 | } |
| 222 | |
| 223 | LOG(LS_INFO) << "selected ip " << ext_addr2.ipaddr(); |
| 224 | |
| 225 | SocketAddress ext_addrs[4] = { |
| 226 | SocketAddress(ext_addr1), |
| 227 | SocketAddress(ext_addr2), |
| 228 | SocketAddress(ext_addr1), |
| 229 | SocketAddress(ext_addr2) |
| 230 | }; |
| 231 | |
| 232 | scoped_ptr<PhysicalSocketServer> int_pss(new PhysicalSocketServer()); |
| 233 | scoped_ptr<PhysicalSocketServer> ext_pss(new PhysicalSocketServer()); |
| 234 | |
| 235 | TestBindings(int_pss.get(), int_addr, ext_pss.get(), ext_addrs); |
| 236 | TestFilters(int_pss.get(), int_addr, ext_pss.get(), ext_addrs); |
| 237 | } |
| 238 | |
| 239 | TEST(NatTest, TestPhysicalIPv4) { |
| 240 | TestPhysicalInternal(SocketAddress("127.0.0.1", 0)); |
| 241 | } |
| 242 | |
| 243 | TEST(NatTest, TestPhysicalIPv6) { |
| 244 | if (HasIPv6Enabled()) { |
| 245 | TestPhysicalInternal(SocketAddress("::1", 0)); |
| 246 | } else { |
| 247 | LOG(LS_WARNING) << "No IPv6, skipping"; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | class TestVirtualSocketServer : public VirtualSocketServer { |
| 252 | public: |
| 253 | explicit TestVirtualSocketServer(SocketServer* ss) |
| 254 | : VirtualSocketServer(ss), |
| 255 | ss_(ss) {} |
| 256 | // Expose this publicly |
| 257 | IPAddress GetNextIP(int af) { return VirtualSocketServer::GetNextIP(af); } |
| 258 | |
| 259 | private: |
| 260 | scoped_ptr<SocketServer> ss_; |
| 261 | }; |
| 262 | |
| 263 | void TestVirtualInternal(int family) { |
| 264 | scoped_ptr<TestVirtualSocketServer> int_vss(new TestVirtualSocketServer( |
| 265 | new PhysicalSocketServer())); |
| 266 | scoped_ptr<TestVirtualSocketServer> ext_vss(new TestVirtualSocketServer( |
| 267 | new PhysicalSocketServer())); |
| 268 | |
| 269 | SocketAddress int_addr; |
| 270 | SocketAddress ext_addrs[4]; |
| 271 | int_addr.SetIP(int_vss->GetNextIP(family)); |
| 272 | ext_addrs[0].SetIP(ext_vss->GetNextIP(int_addr.family())); |
| 273 | ext_addrs[1].SetIP(ext_vss->GetNextIP(int_addr.family())); |
| 274 | ext_addrs[2].SetIP(ext_addrs[0].ipaddr()); |
| 275 | ext_addrs[3].SetIP(ext_addrs[1].ipaddr()); |
| 276 | |
| 277 | TestBindings(int_vss.get(), int_addr, ext_vss.get(), ext_addrs); |
| 278 | TestFilters(int_vss.get(), int_addr, ext_vss.get(), ext_addrs); |
| 279 | } |
| 280 | |
| 281 | TEST(NatTest, TestVirtualIPv4) { |
| 282 | TestVirtualInternal(AF_INET); |
| 283 | } |
| 284 | |
| 285 | TEST(NatTest, TestVirtualIPv6) { |
| 286 | if (HasIPv6Enabled()) { |
| 287 | TestVirtualInternal(AF_INET6); |
| 288 | } else { |
| 289 | LOG(LS_WARNING) << "No IPv6, skipping"; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | // TODO: Finish this test |
| 294 | class NatTcpTest : public testing::Test, public sigslot::has_slots<> { |
| 295 | public: |
| 296 | NatTcpTest() : connected_(false) {} |
| 297 | virtual void SetUp() { |
| 298 | int_vss_ = new TestVirtualSocketServer(new PhysicalSocketServer()); |
| 299 | ext_vss_ = new TestVirtualSocketServer(new PhysicalSocketServer()); |
| 300 | nat_ = new NATServer(NAT_OPEN_CONE, int_vss_, SocketAddress(), |
| 301 | ext_vss_, SocketAddress()); |
| 302 | natsf_ = new NATSocketFactory(int_vss_, nat_->internal_address()); |
| 303 | } |
| 304 | void OnConnectEvent(AsyncSocket* socket) { |
| 305 | connected_ = true; |
| 306 | } |
| 307 | void OnAcceptEvent(AsyncSocket* socket) { |
| 308 | accepted_ = server_->Accept(NULL); |
| 309 | } |
| 310 | void OnCloseEvent(AsyncSocket* socket, int error) { |
| 311 | } |
| 312 | void ConnectEvents() { |
| 313 | server_->SignalReadEvent.connect(this, &NatTcpTest::OnAcceptEvent); |
| 314 | client_->SignalConnectEvent.connect(this, &NatTcpTest::OnConnectEvent); |
| 315 | } |
| 316 | TestVirtualSocketServer* int_vss_; |
| 317 | TestVirtualSocketServer* ext_vss_; |
| 318 | NATServer* nat_; |
| 319 | NATSocketFactory* natsf_; |
| 320 | AsyncSocket* client_; |
| 321 | AsyncSocket* server_; |
| 322 | AsyncSocket* accepted_; |
| 323 | bool connected_; |
| 324 | }; |
| 325 | |
| 326 | TEST_F(NatTcpTest, DISABLED_TestConnectOut) { |
| 327 | server_ = ext_vss_->CreateAsyncSocket(SOCK_STREAM); |
| 328 | server_->Bind(SocketAddress()); |
| 329 | server_->Listen(5); |
| 330 | |
| 331 | client_ = int_vss_->CreateAsyncSocket(SOCK_STREAM); |
| 332 | EXPECT_GE(0, client_->Bind(SocketAddress())); |
| 333 | EXPECT_GE(0, client_->Connect(server_->GetLocalAddress())); |
| 334 | |
| 335 | |
| 336 | ConnectEvents(); |
| 337 | |
| 338 | EXPECT_TRUE_WAIT(connected_, 1000); |
| 339 | EXPECT_EQ(client_->GetRemoteAddress(), server_->GetLocalAddress()); |
| 340 | EXPECT_EQ(client_->GetRemoteAddress(), accepted_->GetLocalAddress()); |
| 341 | EXPECT_EQ(client_->GetLocalAddress(), accepted_->GetRemoteAddress()); |
| 342 | |
| 343 | client_->Close(); |
| 344 | } |
| 345 | //#endif |