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 <string.h> 22 #include <sys/socket.h> 23 #include <sys/types.h> 24 #include <time.h> 25 26 #include <cutils/sockets.h> 27 #include <gtest/gtest.h> 28 29 // Makes sure the passed sockets are valid, sends data between them, and closes 30 // them. Any failures are logged with gtest. 31 // 32 // On Mac recvfrom() will not fill in the address for TCP sockets, so we need 33 // separate logic paths depending on socket type. 34 static void TestConnectedSockets(cutils_socket_t server, cutils_socket_t client, 35 int type) { 36 ASSERT_NE(INVALID_SOCKET, server); 37 ASSERT_NE(INVALID_SOCKET, client); 38 39 char buffer[128]; 40 sockaddr_storage addr; 41 socklen_t addr_size = sizeof(addr); 42 43 // Send client -> server first to get the UDP client's address. 44 ASSERT_EQ(3, send(client, "foo", 3, 0)); 45 if (type == SOCK_DGRAM) { 46 EXPECT_EQ(3, recvfrom(server, buffer, sizeof(buffer), 0, 47 reinterpret_cast<sockaddr*>(&addr), &addr_size)); 48 } else { 49 EXPECT_EQ(3, recv(server, buffer, sizeof(buffer), 0)); 50 } 51 EXPECT_EQ(0, memcmp(buffer, "foo", 3)); 52 53 // Now send server -> client. 54 if (type == SOCK_DGRAM) { 55 ASSERT_EQ(3, sendto(server, "bar", 3, 0, 56 reinterpret_cast<sockaddr*>(&addr), addr_size)); 57 } else { 58 ASSERT_EQ(3, send(server, "bar", 3, 0)); 59 } 60 EXPECT_EQ(3, recv(client, buffer, sizeof(buffer), 0)); 61 EXPECT_EQ(0, memcmp(buffer, "bar", 3)); 62 63 // Send multiple buffers using socket_send_buffers(). 64 std::string data[] = {"foo", "bar", "12345"}; 65 cutils_socket_buffer_t socket_buffers[] = { {data[0].data(), data[0].length()}, 66 {data[1].data(), data[1].length()}, 67 {data[2].data(), data[2].length()} }; 68 EXPECT_EQ(11, socket_send_buffers(client, socket_buffers, 3)); 69 EXPECT_EQ(11, recv(server, buffer, sizeof(buffer), 0)); 70 EXPECT_EQ(0, memcmp(buffer, "foobar12345", 11)); 71 72 EXPECT_EQ(0, socket_close(server)); 73 EXPECT_EQ(0, socket_close(client)); 74 } 75 76 // Tests receive timeout. The timing verification logic must be very coarse to 77 // make sure different systems can all pass these tests. 78 void TestReceiveTimeout(cutils_socket_t sock) { 79 time_t start_time; 80 char buffer[32]; 81 82 // Make sure a 20ms timeout completes in 1 second or less. 83 EXPECT_EQ(0, socket_set_receive_timeout(sock, 20)); 84 start_time = time(nullptr); 85 EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0)); 86 EXPECT_LE(difftime(time(nullptr), start_time), 1.0); 87 88 // Make sure a 1250ms timeout takes 1 second or more. 89 EXPECT_EQ(0, socket_set_receive_timeout(sock, 1250)); 90 start_time = time(nullptr); 91 EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0)); 92 EXPECT_LE(1.0, difftime(time(nullptr), start_time)); 93 } 94 95 // Tests socket_get_local_port(). 96 TEST(SocketsTest, TestGetLocalPort) { 97 cutils_socket_t server; 98 99 // Check a bunch of ports so that we can ignore any conflicts in case 100 // of ports already being taken, but if a server is able to start up we 101 // should always be able to read its port. 102 for (int port : {10000, 12345, 15999, 20202, 25000}) { 103 for (int type : {SOCK_DGRAM, SOCK_STREAM}) { 104 server = socket_inaddr_any_server(port, type); 105 if (server != INVALID_SOCKET) { 106 EXPECT_EQ(port, socket_get_local_port(server)); 107 } 108 socket_close(server); 109 } 110 } 111 112 // Check expected failure for an invalid socket. 113 EXPECT_EQ(-1, socket_get_local_port(INVALID_SOCKET)); 114 } 115 116 // Tests socket_inaddr_any_server() and socket_network_client() for IPv4 UDP. 117 TEST(SocketsTest, TestIpv4UdpLoopback) { 118 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_DGRAM); 119 cutils_socket_t client = socket_network_client( 120 "127.0.0.1", socket_get_local_port(server), SOCK_DGRAM); 121 122 TestConnectedSockets(server, client, SOCK_DGRAM); 123 } 124 125 // Tests socket_inaddr_any_server() and socket_network_client() for IPv4 TCP. 126 TEST(SocketsTest, TestIpv4TcpLoopback) { 127 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM); 128 ASSERT_NE(INVALID_SOCKET, server); 129 130 cutils_socket_t client = socket_network_client( 131 "127.0.0.1", socket_get_local_port(server), SOCK_STREAM); 132 cutils_socket_t handler = accept(server, nullptr, nullptr); 133 EXPECT_EQ(0, socket_close(server)); 134 135 TestConnectedSockets(handler, client, SOCK_STREAM); 136 } 137 138 // Tests socket_inaddr_any_server() and socket_network_client() for IPv6 UDP. 139 TEST(SocketsTest, TestIpv6UdpLoopback) { 140 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_DGRAM); 141 cutils_socket_t client = socket_network_client( 142 "::1", socket_get_local_port(server), SOCK_DGRAM); 143 144 TestConnectedSockets(server, client, SOCK_DGRAM); 145 } 146 147 // Tests socket_inaddr_any_server() and socket_network_client() for IPv6 TCP. 148 TEST(SocketsTest, TestIpv6TcpLoopback) { 149 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM); 150 ASSERT_NE(INVALID_SOCKET, server); 151 152 cutils_socket_t client = socket_network_client( 153 "::1", socket_get_local_port(server), SOCK_STREAM); 154 cutils_socket_t handler = accept(server, nullptr, nullptr); 155 EXPECT_EQ(0, socket_close(server)); 156 157 TestConnectedSockets(handler, client, SOCK_STREAM); 158 } 159 160 // Tests setting a receive timeout for UDP sockets. 161 TEST(SocketsTest, TestUdpReceiveTimeout) { 162 cutils_socket_t sock = socket_inaddr_any_server(0, SOCK_DGRAM); 163 ASSERT_NE(INVALID_SOCKET, sock); 164 165 TestReceiveTimeout(sock); 166 167 EXPECT_EQ(0, socket_close(sock)); 168 } 169 170 // Tests setting a receive timeout for TCP sockets. 171 TEST(SocketsTest, TestTcpReceiveTimeout) { 172 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM); 173 ASSERT_NE(INVALID_SOCKET, server); 174 175 cutils_socket_t client = socket_network_client( 176 "localhost", socket_get_local_port(server), SOCK_STREAM); 177 cutils_socket_t handler = accept(server, nullptr, nullptr); 178 EXPECT_EQ(0, socket_close(server)); 179 180 TestReceiveTimeout(handler); 181 182 EXPECT_EQ(0, socket_close(client)); 183 EXPECT_EQ(0, socket_close(handler)); 184 } 185 186 // Tests socket_send_buffers() failure. 187 TEST(SocketsTest, TestSocketSendBuffersFailure) { 188 EXPECT_EQ(-1, socket_send_buffers(INVALID_SOCKET, nullptr, 0)); 189 } 190
