[NaCl SDK] nacl_io: Add initial support for getsockopt

native_client_sdk/src/tests/nacl_io_socket_test/socket_test.cc

Index: native_client_sdk/src/tests/nacl_io_socket_test/socket_test.cc
diff --git a/native_client_sdk/src/tests/nacl_io_socket_test/socket_test.cc b/native_client_sdk/src/tests/nacl_io_socket_test/socket_test.cc
index e9391d0595746ef760a64fd8b19849b18c0bc284..fdf878f506c75491669b3891363d455400a9bb78 100644
--- a/native_client_sdk/src/tests/nacl_io_socket_test/socket_test.cc
+++ b/native_client_sdk/src/tests/nacl_io_socket_test/socket_test.cc
@@ -216,7 +216,7 @@ TEST_F(SocketTestTCP, DISABLED_Connect) {
   memset(inbuf, 0, sizeof(inbuf));
 
   int sock = socket(AF_INET, SOCK_STREAM, 0);
-  EXPECT_NE(-1, sock);
+  EXPECT_GT(sock, -1);
 
   sockaddr_in addr;
   socklen_t addrlen = sizeof(addr);
@@ -233,4 +233,32 @@ TEST_F(SocketTestTCP, DISABLED_Connect) {
   EXPECT_EQ(0, memcmp(outbuf, inbuf, sizeof(outbuf)));
 }
 
+TEST_F(SocketTest, Setsockopt) {
+  int sock = socket(AF_INET, SOCK_STREAM, 0);
+  EXPECT_GT(sock, -1);
+  int socket_error = 99;
+  socklen_t len = sizeof(socket_error);
+
+  // Test for valid option (SO_ERROR) which should be 0 when a socket
+  // is first created.
+  ASSERT_EQ(0, getsockopt(sock, SOL_SOCKET, SO_ERROR, &socket_error, &len));
+  ASSERT_EQ(0, socket_error);
+  ASSERT_EQ(sizeof(socket_error), len);
+
+  // Test for an invalid option (-1)
+  ASSERT_EQ(-1, getsockopt(sock, SOL_SOCKET, -1, &socket_error, &len));
+  ASSERT_EQ(ENOPROTOOPT, errno);
+}
+
+TEST_F(SocketTest, Getsockopt) {
+  int sock = socket(AF_INET, SOCK_STREAM, 0);
+  EXPECT_GT(sock, -1);
+
+  // It should not be possible to set SO_ERROR using setsockopt.
+  int socket_error = 10;
+  socklen_t len = sizeof(socket_error);
+  ASSERT_EQ(-1, setsockopt(sock, SOL_SOCKET, SO_ERROR, &socket_error, len));
+  ASSERT_EQ(ENOPROTOOPT, errno);
+}
+
 #endif  // PROVIDES_SOCKET_API