1 /* 2 * Copyright (C) 2015 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 // Tests socket functionality using loopback connections. Requires IPv4 and 18 // IPv6 capabilities. These tests assume that no UDP packets are lost, which 19 // should be the case for loopback communication, but is not guaranteed. 20 21 #include <cutils/sockets.h> 22 23 #include <time.h> 24 25 #include <gtest/gtest.h> 26 27 // Makes sure the passed sockets are valid, sends data between them, and closes 28 // them. Any failures are logged with gtest. 29 // 30 // On Mac recvfrom() will not fill in the address for TCP sockets, so we need 31 // separate logic paths depending on socket type. 32 static void TestConnectedSockets(cutils_socket_t server, cutils_socket_t client, 33 int type) { 34 ASSERT_NE(INVALID_SOCKET, server); 35 ASSERT_NE(INVALID_SOCKET, client); 36 37 char buffer[128]; 38 sockaddr_storage addr; 39 socklen_t addr_size = sizeof(addr); 40 41 // Send client -> server first to get the UDP client's address. 42 ASSERT_EQ(3, send(client, "foo", 3, 0)); 43 if (type == SOCK_DGRAM) { 44 EXPECT_EQ(3, recvfrom(server, buffer, sizeof(buffer), 0, 45 reinterpret_cast<sockaddr*>(&addr), &addr_size)); 46 } else { 47 EXPECT_EQ(3, recv(server, buffer, sizeof(buffer), 0)); 48 } 49 EXPECT_EQ(0, memcmp(buffer, "foo", 3)); 50 51 // Now send server -> client. 52 if (type == SOCK_DGRAM) { 53 ASSERT_EQ(3, sendto(server, "bar", 3, 0, 54 reinterpret_cast<sockaddr*>(&addr), addr_size)); 55 } else { 56 ASSERT_EQ(3, send(server, "bar", 3, 0)); 57 } 58 EXPECT_EQ(3, recv(client, buffer, sizeof(buffer), 0)); 59 EXPECT_EQ(0, memcmp(buffer, "bar", 3)); 60 61 // Send multiple buffers using socket_send_buffers(). 62 std::string data[] = {"foo", "bar", "12345"}; 63 cutils_socket_buffer_t socket_buffers[] = { {data[0].data(), data[0].length()}, 64 {data[1].data(), data[1].length()}, 65 {data[2].data(), data[2].length()} }; 66 EXPECT_EQ(11, socket_send_buffers(client, socket_buffers, 3)); 67 EXPECT_EQ(11, recv(server, buffer, sizeof(buffer), 0)); 68 EXPECT_EQ(0, memcmp(buffer, "foobar12345", 11)); 69 70 EXPECT_EQ(0, socket_close(server)); 71 EXPECT_EQ(0, socket_close(client)); 72 } 73 74 // Tests receive timeout. The timing verification logic must be very coarse to 75 // make sure different systems can all pass these tests. 76 void TestReceiveTimeout(cutils_socket_t sock) { 77 time_t start_time; 78 char buffer[32]; 79 80 // Make sure a 20ms timeout completes in 1 second or less. 81 EXPECT_EQ(0, socket_set_receive_timeout(sock, 20)); 82 start_time = time(nullptr); 83 EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0)); 84 EXPECT_LE(difftime(time(nullptr), start_time), 1.0); 85 86 // Make sure a 1250ms timeout takes 1 second or more. 87 EXPECT_EQ(0, socket_set_receive_timeout(sock, 1250)); 88 start_time = time(nullptr); 89 EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0)); 90 EXPECT_LE(1.0, difftime(time(nullptr), start_time)); 91 } 92 93 // Tests socket_get_local_port(). 94 TEST(SocketsTest, TestGetLocalPort) { 95 cutils_socket_t server; 96 97 // Check a bunch of ports so that we can ignore any conflicts in case 98 // of ports already being taken, but if a server is able to start up we 99 // should always be able to read its port. 100 for (int port : {10000, 12345, 15999, 20202, 25000}) { 101 for (int type : {SOCK_DGRAM, SOCK_STREAM}) { 102 server = socket_inaddr_any_server(port, SOCK_DGRAM); 103 if (server != INVALID_SOCKET) { 104 EXPECT_EQ(port, socket_get_local_port(server)); 105 } 106 socket_close(server); 107 } 108 } 109 110 // Check expected failure for an invalid socket. 111 EXPECT_EQ(-1, socket_get_local_port(INVALID_SOCKET)); 112 } 113 114 // Tests socket_inaddr_any_server() and socket_network_client() for IPv4 UDP. 115 TEST(SocketsTest, TestIpv4UdpLoopback) { 116 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_DGRAM); 117 cutils_socket_t client = socket_network_client( 118 "127.0.0.1", socket_get_local_port(server), SOCK_DGRAM); 119 120 TestConnectedSockets(server, client, SOCK_DGRAM); 121 } 122 123 // Tests socket_inaddr_any_server() and socket_network_client() for IPv4 TCP. 124 TEST(SocketsTest, TestIpv4TcpLoopback) { 125 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM); 126 ASSERT_NE(INVALID_SOCKET, server); 127 128 cutils_socket_t client = socket_network_client( 129 "127.0.0.1", socket_get_local_port(server), SOCK_STREAM); 130 cutils_socket_t handler = accept(server, nullptr, nullptr); 131 EXPECT_EQ(0, socket_close(server)); 132 133 TestConnectedSockets(handler, client, SOCK_STREAM); 134 } 135 136 // Tests socket_inaddr_any_server() and socket_network_client() for IPv6 UDP. 137 TEST(SocketsTest, TestIpv6UdpLoopback) { 138 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_DGRAM); 139 cutils_socket_t client = socket_network_client( 140 "::1", socket_get_local_port(server), SOCK_DGRAM); 141 142 TestConnectedSockets(server, client, SOCK_DGRAM); 143 } 144 145 // Tests socket_inaddr_any_server() and socket_network_client() for IPv6 TCP. 146 TEST(SocketsTest, TestIpv6TcpLoopback) { 147 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM); 148 ASSERT_NE(INVALID_SOCKET, server); 149 150 cutils_socket_t client = socket_network_client( 151 "::1", socket_get_local_port(server), SOCK_STREAM); 152 cutils_socket_t handler = accept(server, nullptr, nullptr); 153 EXPECT_EQ(0, socket_close(server)); 154 155 TestConnectedSockets(handler, client, SOCK_STREAM); 156 } 157 158 // Tests setting a receive timeout for UDP sockets. 159 TEST(SocketsTest, TestUdpReceiveTimeout) { 160 cutils_socket_t sock = socket_inaddr_any_server(0, SOCK_DGRAM); 161 ASSERT_NE(INVALID_SOCKET, sock); 162 163 TestReceiveTimeout(sock); 164 165 EXPECT_EQ(0, socket_close(sock)); 166 } 167 168 // Tests setting a receive timeout for TCP sockets. 169 TEST(SocketsTest, TestTcpReceiveTimeout) { 170 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM); 171 ASSERT_NE(INVALID_SOCKET, server); 172 173 cutils_socket_t client = socket_network_client( 174 "localhost", socket_get_local_port(server), SOCK_STREAM); 175 cutils_socket_t handler = accept(server, nullptr, nullptr); 176 EXPECT_EQ(0, socket_close(server)); 177 178 TestReceiveTimeout(handler); 179 180 EXPECT_EQ(0, socket_close(client)); 181 EXPECT_EQ(0, socket_close(handler)); 182 } 183 184 // Tests socket_send_buffers() failure. 185 TEST(SocketsTest, TestSocketSendBuffersFailure) { 186 EXPECT_EQ(-1, socket_send_buffers(INVALID_SOCKET, nullptr, 0)); 187 } 188
