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 <time.h>
23
24 #include <cutils/sockets.h>
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.
TestConnectedSockets(cutils_socket_t server,cutils_socket_t client,int 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 socket_get_local_port().
TEST(SocketsTest,TestGetLocalPort)75 TEST(SocketsTest, TestGetLocalPort) {
76 cutils_socket_t server;
77
78 // Check a bunch of ports so that we can ignore any conflicts in case
79 // of ports already being taken, but if a server is able to start up we
80 // should always be able to read its port.
81 for (int port : {10000, 12345, 15999, 20202, 25000}) {
82 for (int type : {SOCK_DGRAM, SOCK_STREAM}) {
83 server = socket_inaddr_any_server(port, type);
84 if (server != INVALID_SOCKET) {
85 EXPECT_EQ(port, socket_get_local_port(server));
86 }
87 socket_close(server);
88 }
89 }
90
91 // Check expected failure for an invalid socket.
92 EXPECT_EQ(-1, socket_get_local_port(INVALID_SOCKET));
93 }
94
95 // Tests socket_inaddr_any_server() and socket_network_client() for IPv4 UDP.
TEST(SocketsTest,TestIpv4UdpLoopback)96 TEST(SocketsTest, TestIpv4UdpLoopback) {
97 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_DGRAM);
98 cutils_socket_t client = socket_network_client(
99 "127.0.0.1", socket_get_local_port(server), SOCK_DGRAM);
100
101 TestConnectedSockets(server, client, SOCK_DGRAM);
102 }
103
104 // Tests socket_inaddr_any_server() and socket_network_client() for IPv4 TCP.
TEST(SocketsTest,TestIpv4TcpLoopback)105 TEST(SocketsTest, TestIpv4TcpLoopback) {
106 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM);
107 ASSERT_NE(INVALID_SOCKET, server);
108
109 cutils_socket_t client = socket_network_client(
110 "127.0.0.1", socket_get_local_port(server), SOCK_STREAM);
111 cutils_socket_t handler = accept(server, nullptr, nullptr);
112 EXPECT_EQ(0, socket_close(server));
113
114 TestConnectedSockets(handler, client, SOCK_STREAM);
115 }
116
117 // Tests socket_inaddr_any_server() and socket_network_client() for IPv6 UDP.
TEST(SocketsTest,TestIpv6UdpLoopback)118 TEST(SocketsTest, TestIpv6UdpLoopback) {
119 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_DGRAM);
120 cutils_socket_t client = socket_network_client(
121 "::1", socket_get_local_port(server), SOCK_DGRAM);
122
123 TestConnectedSockets(server, client, SOCK_DGRAM);
124 }
125
126 // Tests socket_inaddr_any_server() and socket_network_client() for IPv6 TCP.
TEST(SocketsTest,TestIpv6TcpLoopback)127 TEST(SocketsTest, TestIpv6TcpLoopback) {
128 cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM);
129 ASSERT_NE(INVALID_SOCKET, server);
130
131 cutils_socket_t client = socket_network_client(
132 "::1", socket_get_local_port(server), SOCK_STREAM);
133 cutils_socket_t handler = accept(server, nullptr, nullptr);
134 EXPECT_EQ(0, socket_close(server));
135
136 TestConnectedSockets(handler, client, SOCK_STREAM);
137 }
138
139 // Tests socket_send_buffers() failure.
TEST(SocketsTest,TestSocketSendBuffersFailure)140 TEST(SocketsTest, TestSocketSendBuffersFailure) {
141 EXPECT_EQ(-1, socket_send_buffers(INVALID_SOCKET, nullptr, 0));
142 }
143