1 files changed, 0 insertions, 1358 deletions
diff --git a/test/syscalls/linux/tcp_socket.cc b/test/syscalls/linux/tcp_socket.cc
deleted file mode 100644
index c4591a3b9..000000000
--- a/test/syscalls/linux/tcp_socket.cc
+++ /dev/null
@@ -1,1358 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <fcntl.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <poll.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <unistd.h>
-
-#include <limits>
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-#include "test/syscalls/linux/socket_test_util.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/posix_error.h"
-#include "test/util/test_util.h"
-#include "test/util/thread_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-PosixErrorOr<sockaddr_storage> InetLoopbackAddr(int family) {
-  struct sockaddr_storage addr;
-  memset(&addr, 0, sizeof(addr));
-  addr.ss_family = family;
-  switch (family) {
-    case AF_INET:
-      reinterpret_cast<struct sockaddr_in*>(&addr)->sin_addr.s_addr =
-          htonl(INADDR_LOOPBACK);
-      break;
-    case AF_INET6:
-      reinterpret_cast<struct sockaddr_in6*>(&addr)->sin6_addr =
-          in6addr_loopback;
-      break;
-    default:
-      return PosixError(EINVAL,
-                        absl::StrCat("unknown socket family: ", family));
-  }
-  return addr;
-}
-
-// Fixture for tests parameterized by the address family to use (AF_INET and
-// AF_INET6) when creating sockets.
-class TcpSocketTest : public ::testing::TestWithParam<int> {
- protected:
-  // Creates three sockets that will be used by test cases -- a listener, one
-  // that connects, and the accepted one.
-  void SetUp() override;
-
-  // Closes the sockets created by SetUp().
-  void TearDown() override;
-
-  // Listening socket.
-  int listener_ = -1;
-
-  // Socket connected via connect().
-  int s_ = -1;
-
-  // Socket connected via accept().
-  int t_ = -1;
-
-  // Initial size of the send buffer.
-  int sendbuf_size_ = -1;
-};
-
-void TcpSocketTest::SetUp() {
-  ASSERT_THAT(listener_ = socket(GetParam(), SOCK_STREAM, IPPROTO_TCP),
-              SyscallSucceeds());
-
-  ASSERT_THAT(s_ = socket(GetParam(), SOCK_STREAM, IPPROTO_TCP),
-              SyscallSucceeds());
-
-  // Initialize address to the loopback one.
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t addrlen = sizeof(addr);
-
-  // Bind to some port then start listening.
-  ASSERT_THAT(
-      bind(listener_, reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-      SyscallSucceeds());
-
-  ASSERT_THAT(listen(listener_, SOMAXCONN), SyscallSucceeds());
-
-  // Get the address we're listening on, then connect to it. We need to do this
-  // because we're allowing the stack to pick a port for us.
-  ASSERT_THAT(getsockname(listener_, reinterpret_cast<struct sockaddr*>(&addr),
-                          &addrlen),
-              SyscallSucceeds());
-
-  ASSERT_THAT(RetryEINTR(connect)(s_, reinterpret_cast<struct sockaddr*>(&addr),
-                                  addrlen),
-              SyscallSucceeds());
-
-  // Get the initial send buffer size.
-  socklen_t optlen = sizeof(sendbuf_size_);
-  ASSERT_THAT(getsockopt(s_, SOL_SOCKET, SO_SNDBUF, &sendbuf_size_, &optlen),
-              SyscallSucceeds());
-
-  // Accept the connection.
-  ASSERT_THAT(t_ = RetryEINTR(accept)(listener_, nullptr, nullptr),
-              SyscallSucceeds());
-}
-
-void TcpSocketTest::TearDown() {
-  EXPECT_THAT(close(listener_), SyscallSucceeds());
-  if (s_ >= 0) {
-    EXPECT_THAT(close(s_), SyscallSucceeds());
-  }
-  if (t_ >= 0) {
-    EXPECT_THAT(close(t_), SyscallSucceeds());
-  }
-}
-
-TEST_P(TcpSocketTest, ConnectOnEstablishedConnection) {
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t addrlen = sizeof(addr);
-
-  ASSERT_THAT(
-      connect(s_, reinterpret_cast<const struct sockaddr*>(&addr), addrlen),
-      SyscallFailsWithErrno(EISCONN));
-  ASSERT_THAT(
-      connect(t_, reinterpret_cast<const struct sockaddr*>(&addr), addrlen),
-      SyscallFailsWithErrno(EISCONN));
-}
-
-TEST_P(TcpSocketTest, DataCoalesced) {
-  char buf[10];
-
-  // Write in two steps.
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, sizeof(buf) / 2),
-              SyscallSucceedsWithValue(sizeof(buf) / 2));
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, sizeof(buf) / 2),
-              SyscallSucceedsWithValue(sizeof(buf) / 2));
-
-  // Allow stack to process both packets.
-  absl::SleepFor(absl::Seconds(1));
-
-  // Read in one shot.
-  EXPECT_THAT(RetryEINTR(recv)(t_, buf, sizeof(buf), 0),
-              SyscallSucceedsWithValue(sizeof(buf)));
-}
-
-TEST_P(TcpSocketTest, SenderAddressIgnored) {
-  char buf[3];
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, sizeof(buf)),
-              SyscallSucceedsWithValue(sizeof(buf)));
-
-  struct sockaddr_storage addr;
-  socklen_t addrlen = sizeof(addr);
-  memset(&addr, 0, sizeof(addr));
-
-  ASSERT_THAT(
-      RetryEINTR(recvfrom)(t_, buf, sizeof(buf), 0,
-                           reinterpret_cast<struct sockaddr*>(&addr), &addrlen),
-      SyscallSucceedsWithValue(3));
-
-  // Check that addr remains zeroed-out.
-  const char* ptr = reinterpret_cast<char*>(&addr);
-  for (size_t i = 0; i < sizeof(addr); i++) {
-    EXPECT_EQ(ptr[i], 0);
-  }
-}
-
-TEST_P(TcpSocketTest, SenderAddressIgnoredOnPeek) {
-  char buf[3];
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, sizeof(buf)),
-              SyscallSucceedsWithValue(sizeof(buf)));
-
-  struct sockaddr_storage addr;
-  socklen_t addrlen = sizeof(addr);
-  memset(&addr, 0, sizeof(addr));
-
-  ASSERT_THAT(
-      RetryEINTR(recvfrom)(t_, buf, sizeof(buf), MSG_PEEK,
-                           reinterpret_cast<struct sockaddr*>(&addr), &addrlen),
-      SyscallSucceedsWithValue(3));
-
-  // Check that addr remains zeroed-out.
-  const char* ptr = reinterpret_cast<char*>(&addr);
-  for (size_t i = 0; i < sizeof(addr); i++) {
-    EXPECT_EQ(ptr[i], 0);
-  }
-}
-
-TEST_P(TcpSocketTest, SendtoAddressIgnored) {
-  struct sockaddr_storage addr;
-  memset(&addr, 0, sizeof(addr));
-  addr.ss_family = GetParam();  // FIXME(b/63803955)
-
-  char data = '\0';
-  EXPECT_THAT(
-      RetryEINTR(sendto)(s_, &data, sizeof(data), 0,
-                         reinterpret_cast<sockaddr*>(&addr), sizeof(addr)),
-      SyscallSucceedsWithValue(1));
-}
-
-TEST_P(TcpSocketTest, WritevZeroIovec) {
-  // 2 bytes just to be safe and have vecs[1] not point to something random
-  // (even though length is 0).
-  char buf[2];
-  char recv_buf[1];
-
-  // Construct a vec where the final vector is of length 0.
-  iovec vecs[2] = {};
-  vecs[0].iov_base = buf;
-  vecs[0].iov_len = 1;
-  vecs[1].iov_base = buf + 1;
-  vecs[1].iov_len = 0;
-
-  EXPECT_THAT(RetryEINTR(writev)(s_, vecs, 2), SyscallSucceedsWithValue(1));
-
-  EXPECT_THAT(RetryEINTR(recv)(t_, recv_buf, 1, 0),
-              SyscallSucceedsWithValue(1));
-  EXPECT_EQ(memcmp(recv_buf, buf, 1), 0);
-}
-
-TEST_P(TcpSocketTest, ZeroWriteAllowed) {
-  char buf[3];
-  // Send a zero length packet.
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, 0), SyscallSucceedsWithValue(0));
-  // Verify that there is no packet available.
-  EXPECT_THAT(RetryEINTR(recv)(t_, buf, sizeof(buf), MSG_DONTWAIT),
-              SyscallFailsWithErrno(EAGAIN));
-}
-
-// Test that a non-blocking write with a buffer that is larger than the send
-// buffer size will not actually write the whole thing at once. Regression test
-// for b/64438887.
-TEST_P(TcpSocketTest, NonblockingLargeWrite) {
-  // Set the FD to O_NONBLOCK.
-  int opts;
-  ASSERT_THAT(opts = fcntl(s_, F_GETFL), SyscallSucceeds());
-  opts |= O_NONBLOCK;
-  ASSERT_THAT(fcntl(s_, F_SETFL, opts), SyscallSucceeds());
-
-  // Allocate a buffer three times the size of the send buffer. We do this with
-  // a vector to avoid allocating on the stack.
-  int size = 3 * sendbuf_size_;
-  std::vector<char> buf(size);
-
-  // Try to write the whole thing.
-  int n;
-  ASSERT_THAT(n = RetryEINTR(write)(s_, buf.data(), size), SyscallSucceeds());
-
-  // We should have written something, but not the whole thing.
-  EXPECT_GT(n, 0);
-  EXPECT_LT(n, size);
-}
-
-// Test that a blocking write with a buffer that is larger than the send buffer
-// will block until the entire buffer is sent.
-TEST_P(TcpSocketTest, BlockingLargeWrite_NoRandomSave) {
-  // Allocate a buffer three times the size of the send buffer on the heap. We
-  // do this as a vector to avoid allocating on the stack.
-  int size = 3 * sendbuf_size_;
-  std::vector<char> writebuf(size);
-
-  // Start reading the response in a loop.
-  int read_bytes = 0;
-  ScopedThread t([this, &read_bytes]() {
-    // Avoid interrupting the blocking write in main thread.
-    const DisableSave ds;
-
-    // Take ownership of the FD so that we close it on failure. This will
-    // unblock the blocking write below.
-    FileDescriptor fd(t_);
-    t_ = -1;
-
-    char readbuf[2500] = {};
-    int n = -1;
-    while (n != 0) {
-      ASSERT_THAT(n = RetryEINTR(read)(fd.get(), &readbuf, sizeof(readbuf)),
-                  SyscallSucceeds());
-      read_bytes += n;
-    }
-  });
-
-  // Try to write the whole thing.
-  int n;
-  ASSERT_THAT(n = WriteFd(s_, writebuf.data(), size), SyscallSucceeds());
-
-  // We should have written the whole thing.
-  EXPECT_EQ(n, size);
-  EXPECT_THAT(close(s_), SyscallSucceedsWithValue(0));
-  s_ = -1;
-  t.Join();
-
-  // We should have read the whole thing.
-  EXPECT_EQ(read_bytes, size);
-}
-
-// Test that a send with MSG_DONTWAIT flag and buffer that larger than the send
-// buffer size will not write the whole thing.
-TEST_P(TcpSocketTest, LargeSendDontWait) {
-  // Allocate a buffer three times the size of the send buffer. We do this on
-  // with a vector to avoid allocating on the stack.
-  int size = 3 * sendbuf_size_;
-  std::vector<char> buf(size);
-
-  // Try to write the whole thing with MSG_DONTWAIT flag, which can
-  // return a partial write.
-  int n;
-  ASSERT_THAT(n = RetryEINTR(send)(s_, buf.data(), size, MSG_DONTWAIT),
-              SyscallSucceeds());
-
-  // We should have written something, but not the whole thing.
-  EXPECT_GT(n, 0);
-  EXPECT_LT(n, size);
-}
-
-// Test that a send on a non-blocking socket with a buffer that larger than the
-// send buffer will not write the whole thing at once.
-TEST_P(TcpSocketTest, NonblockingLargeSend) {
-  // Set the FD to O_NONBLOCK.
-  int opts;
-  ASSERT_THAT(opts = fcntl(s_, F_GETFL), SyscallSucceeds());
-  opts |= O_NONBLOCK;
-  ASSERT_THAT(fcntl(s_, F_SETFL, opts), SyscallSucceeds());
-
-  // Allocate a buffer three times the size of the send buffer. We do this on
-  // with a vector to avoid allocating on the stack.
-  int size = 3 * sendbuf_size_;
-  std::vector<char> buf(size);
-
-  // Try to write the whole thing.
-  int n;
-  ASSERT_THAT(n = RetryEINTR(send)(s_, buf.data(), size, 0), SyscallSucceeds());
-
-  // We should have written something, but not the whole thing.
-  EXPECT_GT(n, 0);
-  EXPECT_LT(n, size);
-}
-
-// Same test as above, but calls send instead of write.
-TEST_P(TcpSocketTest, BlockingLargeSend_NoRandomSave) {
-  // Allocate a buffer three times the size of the send buffer. We do this on
-  // with a vector to avoid allocating on the stack.
-  int size = 3 * sendbuf_size_;
-  std::vector<char> writebuf(size);
-
-  // Start reading the response in a loop.
-  int read_bytes = 0;
-  ScopedThread t([this, &read_bytes]() {
-    // Avoid interrupting the blocking write in main thread.
-    const DisableSave ds;
-
-    // Take ownership of the FD so that we close it on failure. This will
-    // unblock the blocking write below.
-    FileDescriptor fd(t_);
-    t_ = -1;
-
-    char readbuf[2500] = {};
-    int n = -1;
-    while (n != 0) {
-      ASSERT_THAT(n = RetryEINTR(read)(fd.get(), &readbuf, sizeof(readbuf)),
-                  SyscallSucceeds());
-      read_bytes += n;
-    }
-  });
-
-  // Try to send the whole thing.
-  int n;
-  ASSERT_THAT(n = SendFd(s_, writebuf.data(), size, 0), SyscallSucceeds());
-
-  // We should have written the whole thing.
-  EXPECT_EQ(n, size);
-  EXPECT_THAT(close(s_), SyscallSucceedsWithValue(0));
-  s_ = -1;
-  t.Join();
-
-  // We should have read the whole thing.
-  EXPECT_EQ(read_bytes, size);
-}
-
-// Test that polling on a socket with a full send buffer will block.
-TEST_P(TcpSocketTest, PollWithFullBufferBlocks) {
-  // Set the FD to O_NONBLOCK.
-  int opts;
-  ASSERT_THAT(opts = fcntl(s_, F_GETFL), SyscallSucceeds());
-  opts |= O_NONBLOCK;
-  ASSERT_THAT(fcntl(s_, F_SETFL, opts), SyscallSucceeds());
-
-  // Set TCP_NODELAY, which will cause linux to fill the receive buffer from the
-  // send buffer as quickly as possibly. This way we can fill up both buffers
-  // faster.
-  constexpr int tcp_nodelay_flag = 1;
-  ASSERT_THAT(setsockopt(s_, IPPROTO_TCP, TCP_NODELAY, &tcp_nodelay_flag,
-                         sizeof(tcp_nodelay_flag)),
-              SyscallSucceeds());
-
-  // Set a 256KB send/receive buffer.
-  int buf_sz = 1 << 18;
-  EXPECT_THAT(setsockopt(t_, SOL_SOCKET, SO_RCVBUF, &buf_sz, sizeof(buf_sz)),
-              SyscallSucceedsWithValue(0));
-  EXPECT_THAT(setsockopt(s_, SOL_SOCKET, SO_SNDBUF, &buf_sz, sizeof(buf_sz)),
-              SyscallSucceedsWithValue(0));
-
-  // Create a large buffer that will be used for sending.
-  std::vector<char> buf(1 << 16);
-
-  // Write until we receive an error.
-  while (RetryEINTR(send)(s_, buf.data(), buf.size(), 0) != -1) {
-    // Sleep to give linux a chance to move data from the send buffer to the
-    // receive buffer.
-    usleep(10000);  // 10ms.
-  }
-  // The last error should have been EWOULDBLOCK.
-  ASSERT_EQ(errno, EWOULDBLOCK);
-
-  // Now polling on the FD with a timeout should return 0 corresponding to no
-  // FDs ready.
-  struct pollfd poll_fd = {s_, POLLOUT, 0};
-  EXPECT_THAT(RetryEINTR(poll)(&poll_fd, 1, 10), SyscallSucceedsWithValue(0));
-}
-
-TEST_P(TcpSocketTest, MsgTrunc) {
-  char sent_data[512];
-  RandomizeBuffer(sent_data, sizeof(sent_data));
-  ASSERT_THAT(RetryEINTR(send)(s_, sent_data, sizeof(sent_data), 0),
-              SyscallSucceedsWithValue(sizeof(sent_data)));
-  char received_data[sizeof(sent_data)] = {};
-  ASSERT_THAT(
-      RetryEINTR(recv)(t_, received_data, sizeof(received_data) / 2, MSG_TRUNC),
-      SyscallSucceedsWithValue(sizeof(sent_data) / 2));
-
-  // Check that we didn't get anything.
-  char zeros[sizeof(received_data)] = {};
-  EXPECT_EQ(0, memcmp(zeros, received_data, sizeof(received_data)));
-}
-
-// MSG_CTRUNC is a return flag but linux allows it to be set on input flags
-// without returning an error.
-TEST_P(TcpSocketTest, MsgTruncWithCtrunc) {
-  char sent_data[512];
-  RandomizeBuffer(sent_data, sizeof(sent_data));
-  ASSERT_THAT(RetryEINTR(send)(s_, sent_data, sizeof(sent_data), 0),
-              SyscallSucceedsWithValue(sizeof(sent_data)));
-  char received_data[sizeof(sent_data)] = {};
-  ASSERT_THAT(RetryEINTR(recv)(t_, received_data, sizeof(received_data) / 2,
-                               MSG_TRUNC | MSG_CTRUNC),
-              SyscallSucceedsWithValue(sizeof(sent_data) / 2));
-
-  // Check that we didn't get anything.
-  char zeros[sizeof(received_data)] = {};
-  EXPECT_EQ(0, memcmp(zeros, received_data, sizeof(received_data)));
-}
-
-// This test will verify that MSG_CTRUNC doesn't do anything when specified
-// on input.
-TEST_P(TcpSocketTest, MsgTruncWithCtruncOnly) {
-  char sent_data[512];
-  RandomizeBuffer(sent_data, sizeof(sent_data));
-  ASSERT_THAT(RetryEINTR(send)(s_, sent_data, sizeof(sent_data), 0),
-              SyscallSucceedsWithValue(sizeof(sent_data)));
-  char received_data[sizeof(sent_data)] = {};
-  ASSERT_THAT(RetryEINTR(recv)(t_, received_data, sizeof(received_data) / 2,
-                               MSG_CTRUNC),
-              SyscallSucceedsWithValue(sizeof(sent_data) / 2));
-
-  // Since MSG_CTRUNC here had no affect, it should not behave like MSG_TRUNC.
-  EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(sent_data) / 2));
-}
-
-TEST_P(TcpSocketTest, MsgTruncLargeSize) {
-  char sent_data[512];
-  RandomizeBuffer(sent_data, sizeof(sent_data));
-  ASSERT_THAT(RetryEINTR(send)(s_, sent_data, sizeof(sent_data), 0),
-              SyscallSucceedsWithValue(sizeof(sent_data)));
-  char received_data[sizeof(sent_data) * 2] = {};
-  ASSERT_THAT(
-      RetryEINTR(recv)(t_, received_data, sizeof(received_data), MSG_TRUNC),
-      SyscallSucceedsWithValue(sizeof(sent_data)));
-
-  // Check that we didn't get anything.
-  char zeros[sizeof(received_data)] = {};
-  EXPECT_EQ(0, memcmp(zeros, received_data, sizeof(received_data)));
-}
-
-TEST_P(TcpSocketTest, MsgTruncPeek) {
-  char sent_data[512];
-  RandomizeBuffer(sent_data, sizeof(sent_data));
-  ASSERT_THAT(RetryEINTR(send)(s_, sent_data, sizeof(sent_data), 0),
-              SyscallSucceedsWithValue(sizeof(sent_data)));
-  char received_data[sizeof(sent_data)] = {};
-  ASSERT_THAT(RetryEINTR(recv)(t_, received_data, sizeof(received_data) / 2,
-                               MSG_TRUNC | MSG_PEEK),
-              SyscallSucceedsWithValue(sizeof(sent_data) / 2));
-
-  // Check that we didn't get anything.
-  char zeros[sizeof(received_data)] = {};
-  EXPECT_EQ(0, memcmp(zeros, received_data, sizeof(received_data)));
-
-  // Check that we can still get all of the data.
-  ASSERT_THAT(RetryEINTR(recv)(t_, received_data, sizeof(received_data), 0),
-              SyscallSucceedsWithValue(sizeof(sent_data)));
-  EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(sent_data)));
-}
-
-TEST_P(TcpSocketTest, NoDelayDefault) {
-  int get = -1;
-  socklen_t get_len = sizeof(get);
-  EXPECT_THAT(getsockopt(s_, IPPROTO_TCP, TCP_NODELAY, &get, &get_len),
-              SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_len, sizeof(get));
-  EXPECT_EQ(get, kSockOptOff);
-}
-
-TEST_P(TcpSocketTest, SetNoDelay) {
-  ASSERT_THAT(
-      setsockopt(s_, IPPROTO_TCP, TCP_NODELAY, &kSockOptOn, sizeof(kSockOptOn)),
-      SyscallSucceeds());
-
-  int get = -1;
-  socklen_t get_len = sizeof(get);
-  EXPECT_THAT(getsockopt(s_, IPPROTO_TCP, TCP_NODELAY, &get, &get_len),
-              SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_len, sizeof(get));
-  EXPECT_EQ(get, kSockOptOn);
-
-  ASSERT_THAT(setsockopt(s_, IPPROTO_TCP, TCP_NODELAY, &kSockOptOff,
-                         sizeof(kSockOptOff)),
-              SyscallSucceeds());
-
-  EXPECT_THAT(getsockopt(s_, IPPROTO_TCP, TCP_NODELAY, &get, &get_len),
-              SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_len, sizeof(get));
-  EXPECT_EQ(get, kSockOptOff);
-}
-
-#ifndef TCP_INQ
-#define TCP_INQ 36
-#endif
-
-TEST_P(TcpSocketTest, TcpInqSetSockOpt) {
-  char buf[1024];
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, sizeof(buf)),
-              SyscallSucceedsWithValue(sizeof(buf)));
-
-  // TCP_INQ is disabled by default.
-  int val = -1;
-  socklen_t slen = sizeof(val);
-  EXPECT_THAT(getsockopt(t_, SOL_TCP, TCP_INQ, &val, &slen),
-              SyscallSucceedsWithValue(0));
-  ASSERT_EQ(val, 0);
-
-  // Try to set TCP_INQ.
-  val = 1;
-  EXPECT_THAT(setsockopt(t_, SOL_TCP, TCP_INQ, &val, sizeof(val)),
-              SyscallSucceedsWithValue(0));
-  val = -1;
-  slen = sizeof(val);
-  EXPECT_THAT(getsockopt(t_, SOL_TCP, TCP_INQ, &val, &slen),
-              SyscallSucceedsWithValue(0));
-  ASSERT_EQ(val, 1);
-
-  // Try to unset TCP_INQ.
-  val = 0;
-  EXPECT_THAT(setsockopt(t_, SOL_TCP, TCP_INQ, &val, sizeof(val)),
-              SyscallSucceedsWithValue(0));
-  val = -1;
-  slen = sizeof(val);
-  EXPECT_THAT(getsockopt(t_, SOL_TCP, TCP_INQ, &val, &slen),
-              SyscallSucceedsWithValue(0));
-  ASSERT_EQ(val, 0);
-}
-
-TEST_P(TcpSocketTest, TcpInq) {
-  char buf[1024];
-  // Write more than one TCP segment.
-  int size = sizeof(buf);
-  int kChunk = sizeof(buf) / 4;
-  for (int i = 0; i < size; i += kChunk) {
-    ASSERT_THAT(RetryEINTR(write)(s_, buf, kChunk),
-                SyscallSucceedsWithValue(kChunk));
-  }
-
-  int val = 1;
-  kChunk = sizeof(buf) / 2;
-  EXPECT_THAT(setsockopt(t_, SOL_TCP, TCP_INQ, &val, sizeof(val)),
-              SyscallSucceedsWithValue(0));
-
-  // Wait when all data will be in the received queue.
-  while (true) {
-    ASSERT_THAT(ioctl(t_, TIOCINQ, &size), SyscallSucceeds());
-    if (size == sizeof(buf)) {
-      break;
-    }
-    absl::SleepFor(absl::Milliseconds(10));
-  }
-
-  struct msghdr msg = {};
-  std::vector<char> control(CMSG_SPACE(sizeof(int)));
-  size = sizeof(buf);
-  struct iovec iov;
-  for (int i = 0; size != 0; i += kChunk) {
-    msg.msg_control = &control[0];
-    msg.msg_controllen = control.size();
-
-    iov.iov_base = buf;
-    iov.iov_len = kChunk;
-    msg.msg_iov = &iov;
-    msg.msg_iovlen = 1;
-    ASSERT_THAT(RetryEINTR(recvmsg)(t_, &msg, 0),
-                SyscallSucceedsWithValue(kChunk));
-    size -= kChunk;
-
-    struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
-    ASSERT_NE(cmsg, nullptr);
-    ASSERT_EQ(cmsg->cmsg_len, CMSG_LEN(sizeof(int)));
-    ASSERT_EQ(cmsg->cmsg_level, SOL_TCP);
-    ASSERT_EQ(cmsg->cmsg_type, TCP_INQ);
-
-    int inq = 0;
-    memcpy(&inq, CMSG_DATA(cmsg), sizeof(int));
-    ASSERT_EQ(inq, size);
-  }
-}
-
-TEST_P(TcpSocketTest, Tiocinq) {
-  char buf[1024];
-  size_t size = sizeof(buf);
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, size), SyscallSucceedsWithValue(size));
-
-  uint32_t seed = time(nullptr);
-  const size_t max_chunk = size / 10;
-  while (size > 0) {
-    size_t chunk = (rand_r(&seed) % max_chunk) + 1;
-    ssize_t read = RetryEINTR(recvfrom)(t_, buf, chunk, 0, nullptr, nullptr);
-    ASSERT_THAT(read, SyscallSucceeds());
-    size -= read;
-
-    int inq = 0;
-    ASSERT_THAT(ioctl(t_, TIOCINQ, &inq), SyscallSucceeds());
-    ASSERT_EQ(inq, size);
-  }
-}
-
-TEST_P(TcpSocketTest, TcpSCMPriority) {
-  char buf[1024];
-  ASSERT_THAT(RetryEINTR(write)(s_, buf, sizeof(buf)),
-              SyscallSucceedsWithValue(sizeof(buf)));
-
-  int val = 1;
-  EXPECT_THAT(setsockopt(t_, SOL_TCP, TCP_INQ, &val, sizeof(val)),
-              SyscallSucceedsWithValue(0));
-  EXPECT_THAT(setsockopt(t_, SOL_SOCKET, SO_TIMESTAMP, &val, sizeof(val)),
-              SyscallSucceedsWithValue(0));
-
-  struct msghdr msg = {};
-  std::vector<char> control(
-      CMSG_SPACE(sizeof(struct timeval) + CMSG_SPACE(sizeof(int))));
-  struct iovec iov;
-  msg.msg_control = &control[0];
-  msg.msg_controllen = control.size();
-
-  iov.iov_base = buf;
-  iov.iov_len = sizeof(buf);
-  msg.msg_iov = &iov;
-  msg.msg_iovlen = 1;
-  ASSERT_THAT(RetryEINTR(recvmsg)(t_, &msg, 0),
-              SyscallSucceedsWithValue(sizeof(buf)));
-
-  struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
-  ASSERT_NE(cmsg, nullptr);
-  // TODO(b/78348848): SO_TIMESTAMP isn't implemented for TCP sockets.
-  if (!IsRunningOnGvisor() || cmsg->cmsg_level == SOL_SOCKET) {
-    ASSERT_EQ(cmsg->cmsg_level, SOL_SOCKET);
-    ASSERT_EQ(cmsg->cmsg_type, SO_TIMESTAMP);
-    ASSERT_EQ(cmsg->cmsg_len, CMSG_LEN(sizeof(struct timeval)));
-
-    cmsg = CMSG_NXTHDR(&msg, cmsg);
-    ASSERT_NE(cmsg, nullptr);
-  }
-  ASSERT_EQ(cmsg->cmsg_len, CMSG_LEN(sizeof(int)));
-  ASSERT_EQ(cmsg->cmsg_level, SOL_TCP);
-  ASSERT_EQ(cmsg->cmsg_type, TCP_INQ);
-
-  int inq = 0;
-  memcpy(&inq, CMSG_DATA(cmsg), sizeof(int));
-  ASSERT_EQ(inq, 0);
-
-  cmsg = CMSG_NXTHDR(&msg, cmsg);
-  ASSERT_EQ(cmsg, nullptr);
-}
-
-INSTANTIATE_TEST_SUITE_P(AllInetTests, TcpSocketTest,
-                         ::testing::Values(AF_INET, AF_INET6));
-
-// Fixture for tests parameterized by address family that don't want the fixture
-// to do things.
-using SimpleTcpSocketTest = ::testing::TestWithParam<int>;
-
-TEST_P(SimpleTcpSocketTest, SendUnconnected) {
-  int fd;
-  ASSERT_THAT(fd = socket(GetParam(), SOCK_STREAM, IPPROTO_TCP),
-              SyscallSucceeds());
-  FileDescriptor sock_fd(fd);
-
-  char data = '\0';
-  EXPECT_THAT(RetryEINTR(send)(fd, &data, sizeof(data), 0),
-              SyscallFailsWithErrno(EPIPE));
-}
-
-TEST_P(SimpleTcpSocketTest, SendtoWithoutAddressUnconnected) {
-  int fd;
-  ASSERT_THAT(fd = socket(GetParam(), SOCK_STREAM, IPPROTO_TCP),
-              SyscallSucceeds());
-  FileDescriptor sock_fd(fd);
-
-  char data = '\0';
-  EXPECT_THAT(RetryEINTR(sendto)(fd, &data, sizeof(data), 0, nullptr, 0),
-              SyscallFailsWithErrno(EPIPE));
-}
-
-TEST_P(SimpleTcpSocketTest, SendtoWithAddressUnconnected) {
-  int fd;
-  ASSERT_THAT(fd = socket(GetParam(), SOCK_STREAM, IPPROTO_TCP),
-              SyscallSucceeds());
-  FileDescriptor sock_fd(fd);
-
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  char data = '\0';
-  EXPECT_THAT(
-      RetryEINTR(sendto)(fd, &data, sizeof(data), 0,
-                         reinterpret_cast<sockaddr*>(&addr), sizeof(addr)),
-      SyscallFailsWithErrno(EPIPE));
-}
-
-TEST_P(SimpleTcpSocketTest, GetPeerNameUnconnected) {
-  int fd;
-  ASSERT_THAT(fd = socket(GetParam(), SOCK_STREAM, IPPROTO_TCP),
-              SyscallSucceeds());
-  FileDescriptor sock_fd(fd);
-
-  sockaddr_storage addr;
-  socklen_t addrlen = sizeof(addr);
-  EXPECT_THAT(getpeername(fd, reinterpret_cast<sockaddr*>(&addr), &addrlen),
-              SyscallFailsWithErrno(ENOTCONN));
-}
-
-TEST_P(TcpSocketTest, FullBuffer) {
-  // Set both FDs to be blocking.
-  int flags = 0;
-  ASSERT_THAT(flags = fcntl(s_, F_GETFL), SyscallSucceeds());
-  EXPECT_THAT(fcntl(s_, F_SETFL, flags & ~O_NONBLOCK), SyscallSucceeds());
-  flags = 0;
-  ASSERT_THAT(flags = fcntl(t_, F_GETFL), SyscallSucceeds());
-  EXPECT_THAT(fcntl(t_, F_SETFL, flags & ~O_NONBLOCK), SyscallSucceeds());
-
-  // 2500 was chosen as a small value that can be set on Linux.
-  int set_snd = 2500;
-  EXPECT_THAT(setsockopt(s_, SOL_SOCKET, SO_SNDBUF, &set_snd, sizeof(set_snd)),
-              SyscallSucceedsWithValue(0));
-  int get_snd = -1;
-  socklen_t get_snd_len = sizeof(get_snd);
-  EXPECT_THAT(getsockopt(s_, SOL_SOCKET, SO_SNDBUF, &get_snd, &get_snd_len),
-              SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_snd_len, sizeof(get_snd));
-  EXPECT_GT(get_snd, 0);
-
-  // 2500 was chosen as a small value that can be set on Linux and gVisor.
-  int set_rcv = 2500;
-  EXPECT_THAT(setsockopt(t_, SOL_SOCKET, SO_RCVBUF, &set_rcv, sizeof(set_rcv)),
-              SyscallSucceedsWithValue(0));
-  int get_rcv = -1;
-  socklen_t get_rcv_len = sizeof(get_rcv);
-  EXPECT_THAT(getsockopt(t_, SOL_SOCKET, SO_RCVBUF, &get_rcv, &get_rcv_len),
-              SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_rcv_len, sizeof(get_rcv));
-  EXPECT_GE(get_rcv, 2500);
-
-  // Quick sanity test.
-  EXPECT_LT(get_snd + get_rcv, 2500 * IOV_MAX);
-
-  char data[2500] = {};
-  std::vector<struct iovec> iovecs;
-  for (int i = 0; i < IOV_MAX; i++) {
-    struct iovec iov = {};
-    iov.iov_base = data;
-    iov.iov_len = sizeof(data);
-    iovecs.push_back(iov);
-  }
-  ScopedThread t([this, &iovecs]() {
-    int result = -1;
-    EXPECT_THAT(result = RetryEINTR(writev)(s_, iovecs.data(), iovecs.size()),
-                SyscallSucceeds());
-    EXPECT_GT(result, 1);
-    EXPECT_LT(result, sizeof(data) * iovecs.size());
-  });
-
-  char recv = 0;
-  EXPECT_THAT(RetryEINTR(read)(t_, &recv, 1), SyscallSucceedsWithValue(1));
-  EXPECT_THAT(close(t_), SyscallSucceedsWithValue(0));
-  t_ = -1;
-}
-
-TEST_P(TcpSocketTest, PollAfterShutdown) {
-  ScopedThread client_thread([this]() {
-    EXPECT_THAT(shutdown(s_, SHUT_WR), SyscallSucceedsWithValue(0));
-    struct pollfd poll_fd = {s_, POLLIN | POLLERR | POLLHUP, 0};
-    EXPECT_THAT(RetryEINTR(poll)(&poll_fd, 1, 10000),
-                SyscallSucceedsWithValue(1));
-  });
-
-  EXPECT_THAT(shutdown(t_, SHUT_WR), SyscallSucceedsWithValue(0));
-  struct pollfd poll_fd = {t_, POLLIN | POLLERR | POLLHUP, 0};
-  EXPECT_THAT(RetryEINTR(poll)(&poll_fd, 1, 10000),
-              SyscallSucceedsWithValue(1));
-}
-
-TEST_P(SimpleTcpSocketTest, NonBlockingConnectNoListener) {
-  // Initialize address to the loopback one.
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t addrlen = sizeof(addr);
-
-  const FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  // Set the FD to O_NONBLOCK.
-  int opts;
-  ASSERT_THAT(opts = fcntl(s.get(), F_GETFL), SyscallSucceeds());
-  opts |= O_NONBLOCK;
-  ASSERT_THAT(fcntl(s.get(), F_SETFL, opts), SyscallSucceeds());
-
-  ASSERT_THAT(RetryEINTR(connect)(
-                  s.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-              SyscallFailsWithErrno(EINPROGRESS));
-
-  // Now polling on the FD with a timeout should return 0 corresponding to no
-  // FDs ready.
-  struct pollfd poll_fd = {s.get(), POLLOUT, 0};
-  EXPECT_THAT(RetryEINTR(poll)(&poll_fd, 1, 10000),
-              SyscallSucceedsWithValue(1));
-
-  int err;
-  socklen_t optlen = sizeof(err);
-  ASSERT_THAT(getsockopt(s.get(), SOL_SOCKET, SO_ERROR, &err, &optlen),
-              SyscallSucceeds());
-
-  EXPECT_EQ(err, ECONNREFUSED);
-}
-
-TEST_P(SimpleTcpSocketTest, NonBlockingConnect) {
-  const FileDescriptor listener =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  // Initialize address to the loopback one.
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t addrlen = sizeof(addr);
-
-  // Bind to some port then start listening.
-  ASSERT_THAT(
-      bind(listener.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-      SyscallSucceeds());
-
-  ASSERT_THAT(listen(listener.get(), SOMAXCONN), SyscallSucceeds());
-
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  // Set the FD to O_NONBLOCK.
-  int opts;
-  ASSERT_THAT(opts = fcntl(s.get(), F_GETFL), SyscallSucceeds());
-  opts |= O_NONBLOCK;
-  ASSERT_THAT(fcntl(s.get(), F_SETFL, opts), SyscallSucceeds());
-
-  ASSERT_THAT(getsockname(listener.get(),
-                          reinterpret_cast<struct sockaddr*>(&addr), &addrlen),
-              SyscallSucceeds());
-
-  ASSERT_THAT(RetryEINTR(connect)(
-                  s.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-              SyscallFailsWithErrno(EINPROGRESS));
-
-  int t;
-  ASSERT_THAT(t = RetryEINTR(accept)(listener.get(), nullptr, nullptr),
-              SyscallSucceeds());
-
-  // Now polling on the FD with a timeout should return 0 corresponding to no
-  // FDs ready.
-  struct pollfd poll_fd = {s.get(), POLLOUT, 0};
-  EXPECT_THAT(RetryEINTR(poll)(&poll_fd, 1, 10000),
-              SyscallSucceedsWithValue(1));
-
-  int err;
-  socklen_t optlen = sizeof(err);
-  ASSERT_THAT(getsockopt(s.get(), SOL_SOCKET, SO_ERROR, &err, &optlen),
-              SyscallSucceeds());
-
-  EXPECT_EQ(err, 0);
-
-  EXPECT_THAT(close(t), SyscallSucceeds());
-}
-
-TEST_P(SimpleTcpSocketTest, NonBlockingConnectRemoteClose) {
-  const FileDescriptor listener =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  // Initialize address to the loopback one.
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t addrlen = sizeof(addr);
-
-  // Bind to some port then start listening.
-  ASSERT_THAT(
-      bind(listener.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-      SyscallSucceeds());
-
-  ASSERT_THAT(listen(listener.get(), SOMAXCONN), SyscallSucceeds());
-
-  FileDescriptor s = ASSERT_NO_ERRNO_AND_VALUE(
-      Socket(GetParam(), SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP));
-
-  ASSERT_THAT(getsockname(listener.get(),
-                          reinterpret_cast<struct sockaddr*>(&addr), &addrlen),
-              SyscallSucceeds());
-
-  ASSERT_THAT(RetryEINTR(connect)(
-                  s.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-              SyscallFailsWithErrno(EINPROGRESS));
-
-  int t;
-  ASSERT_THAT(t = RetryEINTR(accept)(listener.get(), nullptr, nullptr),
-              SyscallSucceeds());
-
-  EXPECT_THAT(close(t), SyscallSucceeds());
-
-  // Now polling on the FD with a timeout should return 0 corresponding to no
-  // FDs ready.
-  struct pollfd poll_fd = {s.get(), POLLOUT, 0};
-  EXPECT_THAT(RetryEINTR(poll)(&poll_fd, 1, 10000),
-              SyscallSucceedsWithValue(1));
-
-  ASSERT_THAT(RetryEINTR(connect)(
-                  s.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-              SyscallSucceeds());
-
-  ASSERT_THAT(RetryEINTR(connect)(
-                  s.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-              SyscallFailsWithErrno(EISCONN));
-}
-
-// Test that we get an ECONNREFUSED with a blocking socket when no one is
-// listening on the other end.
-TEST_P(SimpleTcpSocketTest, BlockingConnectRefused) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  // Initialize address to the loopback one.
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t addrlen = sizeof(addr);
-
-  ASSERT_THAT(RetryEINTR(connect)(
-                  s.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-              SyscallFailsWithErrno(ECONNREFUSED));
-
-  // Avoiding triggering save in destructor of s.
-  EXPECT_THAT(close(s.release()), SyscallSucceeds());
-}
-
-// Test that connecting to a non-listening port and thus receiving a RST is
-// handled appropriately by the socket - the port that the socket was bound to
-// is released and the expected error is returned.
-TEST_P(SimpleTcpSocketTest, CleanupOnConnectionRefused) {
-  // Create a socket that is known to not be listening. As is it bound but not
-  // listening, when another socket connects to the port, it will refuse..
-  FileDescriptor bound_s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  sockaddr_storage bound_addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t bound_addrlen = sizeof(bound_addr);
-
-  ASSERT_THAT(
-      bind(bound_s.get(), reinterpret_cast<struct sockaddr*>(&bound_addr),
-           bound_addrlen),
-      SyscallSucceeds());
-
-  // Get the addresses the socket is bound to because the port is chosen by the
-  // stack.
-  ASSERT_THAT(getsockname(bound_s.get(),
-                          reinterpret_cast<struct sockaddr*>(&bound_addr),
-                          &bound_addrlen),
-              SyscallSucceeds());
-
-  // Create, initialize, and bind the socket that is used to test connecting to
-  // the non-listening port.
-  FileDescriptor client_s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-  // Initialize client address to the loopback one.
-  sockaddr_storage client_addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t client_addrlen = sizeof(client_addr);
-
-  ASSERT_THAT(
-      bind(client_s.get(), reinterpret_cast<struct sockaddr*>(&client_addr),
-           client_addrlen),
-      SyscallSucceeds());
-
-  ASSERT_THAT(getsockname(client_s.get(),
-                          reinterpret_cast<struct sockaddr*>(&client_addr),
-                          &client_addrlen),
-              SyscallSucceeds());
-
-  // Now the test: connect to the bound but not listening socket with the
-  // client socket. The bound socket should return a RST and cause the client
-  // socket to return an error and clean itself up immediately.
-  // The error being ECONNREFUSED diverges with RFC 793, page 37, but does what
-  // Linux does.
-  ASSERT_THAT(connect(client_s.get(),
-                      reinterpret_cast<const struct sockaddr*>(&bound_addr),
-                      bound_addrlen),
-              SyscallFailsWithErrno(ECONNREFUSED));
-
-  FileDescriptor new_s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  // Test binding to the address from the client socket. This should be okay
-  // if it was dropped correctly.
-  ASSERT_THAT(
-      bind(new_s.get(), reinterpret_cast<struct sockaddr*>(&client_addr),
-           client_addrlen),
-      SyscallSucceeds());
-
-  // Attempt #2, with the new socket and reused addr our connect should fail in
-  // the same way as before, not with an EADDRINUSE.
-  ASSERT_THAT(connect(client_s.get(),
-                      reinterpret_cast<const struct sockaddr*>(&bound_addr),
-                      bound_addrlen),
-              SyscallFailsWithErrno(ECONNREFUSED));
-}
-
-// Test that we get an ECONNREFUSED with a nonblocking socket.
-TEST_P(SimpleTcpSocketTest, NonBlockingConnectRefused) {
-  FileDescriptor s = ASSERT_NO_ERRNO_AND_VALUE(
-      Socket(GetParam(), SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP));
-
-  // Initialize address to the loopback one.
-  sockaddr_storage addr =
-      ASSERT_NO_ERRNO_AND_VALUE(InetLoopbackAddr(GetParam()));
-  socklen_t addrlen = sizeof(addr);
-
-  ASSERT_THAT(RetryEINTR(connect)(
-                  s.get(), reinterpret_cast<struct sockaddr*>(&addr), addrlen),
-              SyscallFailsWithErrno(EINPROGRESS));
-
-  // We don't need to specify any events to get POLLHUP or POLLERR as these
-  // are added before the poll.
-  struct pollfd poll_fd = {s.get(), /*events=*/0, 0};
-  EXPECT_THAT(RetryEINTR(poll)(&poll_fd, 1, 1000), SyscallSucceedsWithValue(1));
-
-  // The ECONNREFUSED should cause us to be woken up with POLLHUP.
-  EXPECT_NE(poll_fd.revents & (POLLHUP | POLLERR), 0);
-
-  // Avoiding triggering save in destructor of s.
-  EXPECT_THAT(close(s.release()), SyscallSucceeds());
-}
-
-// Test that setting a supported congestion control algorithm succeeds for an
-// unconnected TCP socket
-TEST_P(SimpleTcpSocketTest, SetCongestionControlSucceedsForSupported) {
-  // This is Linux's net/tcp.h TCP_CA_NAME_MAX.
-  const int kTcpCaNameMax = 16;
-
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-  {
-    const char kSetCC[kTcpCaNameMax] = "reno";
-    ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &kSetCC,
-                           strlen(kSetCC)),
-                SyscallSucceedsWithValue(0));
-
-    char got_cc[kTcpCaNameMax];
-    memset(got_cc, '1', sizeof(got_cc));
-    socklen_t optlen = sizeof(got_cc);
-    ASSERT_THAT(
-        getsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &got_cc, &optlen),
-        SyscallSucceedsWithValue(0));
-    // We ignore optlen here as the linux kernel sets optlen to the lower of the
-    // size of the buffer passed in or kTcpCaNameMax and not the length of the
-    // congestion control algorithm's actual name.
-    EXPECT_EQ(0, memcmp(got_cc, kSetCC, sizeof(kTcpCaNameMax)));
-  }
-  {
-    const char kSetCC[kTcpCaNameMax] = "cubic";
-    ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &kSetCC,
-                           strlen(kSetCC)),
-                SyscallSucceedsWithValue(0));
-
-    char got_cc[kTcpCaNameMax];
-    memset(got_cc, '1', sizeof(got_cc));
-    socklen_t optlen = sizeof(got_cc);
-    ASSERT_THAT(
-        getsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &got_cc, &optlen),
-        SyscallSucceedsWithValue(0));
-    // We ignore optlen here as the linux kernel sets optlen to the lower of the
-    // size of the buffer passed in or kTcpCaNameMax and not the length of the
-    // congestion control algorithm's actual name.
-    EXPECT_EQ(0, memcmp(got_cc, kSetCC, sizeof(kTcpCaNameMax)));
-  }
-}
-
-// This test verifies that a getsockopt(...TCP_CONGESTION) behaviour is
-// consistent between linux and gvisor when the passed in buffer is smaller than
-// kTcpCaNameMax.
-TEST_P(SimpleTcpSocketTest, SetGetTCPCongestionShortReadBuffer) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-  {
-    // Verify that getsockopt/setsockopt work with buffers smaller than
-    // kTcpCaNameMax.
-    const char kSetCC[] = "cubic";
-    ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &kSetCC,
-                           strlen(kSetCC)),
-                SyscallSucceedsWithValue(0));
-
-    char got_cc[sizeof(kSetCC)];
-    socklen_t optlen = sizeof(got_cc);
-    ASSERT_THAT(
-        getsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &got_cc, &optlen),
-        SyscallSucceedsWithValue(0));
-    EXPECT_EQ(sizeof(got_cc), optlen);
-    EXPECT_EQ(0, memcmp(got_cc, kSetCC, sizeof(got_cc)));
-  }
-}
-
-// This test verifies that a getsockopt(...TCP_CONGESTION) behaviour is
-// consistent between linux and gvisor when the passed in buffer is larger than
-// kTcpCaNameMax.
-TEST_P(SimpleTcpSocketTest, SetGetTCPCongestionLargeReadBuffer) {
-  // This is Linux's net/tcp.h TCP_CA_NAME_MAX.
-  const int kTcpCaNameMax = 16;
-
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-  {
-    // Verify that getsockopt works with buffers larger than
-    // kTcpCaNameMax.
-    const char kSetCC[] = "cubic";
-    ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &kSetCC,
-                           strlen(kSetCC)),
-                SyscallSucceedsWithValue(0));
-
-    char got_cc[kTcpCaNameMax + 5];
-    socklen_t optlen = sizeof(got_cc);
-    ASSERT_THAT(
-        getsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &got_cc, &optlen),
-        SyscallSucceedsWithValue(0));
-    // Linux copies the minimum of kTcpCaNameMax or the length of the passed in
-    // buffer and sets optlen to the number of bytes actually copied
-    // irrespective of the actual length of the congestion control name.
-    EXPECT_EQ(kTcpCaNameMax, optlen);
-    EXPECT_EQ(0, memcmp(got_cc, kSetCC, sizeof(kSetCC)));
-  }
-}
-
-// Test that setting an unsupported congestion control algorithm fails for an
-// unconnected TCP socket.
-TEST_P(SimpleTcpSocketTest, SetCongestionControlFailsForUnsupported) {
-  // This is Linux's net/tcp.h TCP_CA_NAME_MAX.
-  const int kTcpCaNameMax = 16;
-
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-  char old_cc[kTcpCaNameMax];
-  socklen_t optlen = sizeof(old_cc);
-  ASSERT_THAT(
-      getsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &old_cc, &optlen),
-      SyscallSucceedsWithValue(0));
-
-  const char kSetCC[] = "invalid_ca_kSetCC";
-  ASSERT_THAT(
-      setsockopt(s.get(), SOL_TCP, TCP_CONGESTION, &kSetCC, strlen(kSetCC)),
-      SyscallFailsWithErrno(ENOENT));
-
-  char got_cc[kTcpCaNameMax];
-  ASSERT_THAT(
-      getsockopt(s.get(), IPPROTO_TCP, TCP_CONGESTION, &got_cc, &optlen),
-      SyscallSucceedsWithValue(0));
-  // We ignore optlen here as the linux kernel sets optlen to the lower of the
-  // size of the buffer passed in or kTcpCaNameMax and not the length of the
-  // congestion control algorithm's actual name.
-  EXPECT_EQ(0, memcmp(got_cc, old_cc, sizeof(kTcpCaNameMax)));
-}
-
-TEST_P(SimpleTcpSocketTest, MaxSegDefault) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  constexpr int kDefaultMSS = 536;
-  int tcp_max_seg;
-  socklen_t optlen = sizeof(tcp_max_seg);
-  ASSERT_THAT(
-      getsockopt(s.get(), IPPROTO_TCP, TCP_MAXSEG, &tcp_max_seg, &optlen),
-      SyscallSucceedsWithValue(0));
-
-  EXPECT_EQ(kDefaultMSS, tcp_max_seg);
-  EXPECT_EQ(sizeof(tcp_max_seg), optlen);
-}
-
-TEST_P(SimpleTcpSocketTest, SetMaxSeg) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  constexpr int kDefaultMSS = 536;
-  constexpr int kTCPMaxSeg = 1024;
-  ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_MAXSEG, &kTCPMaxSeg,
-                         sizeof(kTCPMaxSeg)),
-              SyscallSucceedsWithValue(0));
-
-  // Linux actually never returns the user_mss value. It will always return the
-  // default MSS value defined above for an unconnected socket and always return
-  // the actual current MSS for a connected one.
-  int optval;
-  socklen_t optlen = sizeof(optval);
-  ASSERT_THAT(getsockopt(s.get(), IPPROTO_TCP, TCP_MAXSEG, &optval, &optlen),
-              SyscallSucceedsWithValue(0));
-
-  EXPECT_EQ(kDefaultMSS, optval);
-  EXPECT_EQ(sizeof(optval), optlen);
-}
-
-TEST_P(SimpleTcpSocketTest, SetMaxSegFailsForInvalidMSSValues) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  {
-    constexpr int tcp_max_seg = 10;
-    ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_MAXSEG, &tcp_max_seg,
-                           sizeof(tcp_max_seg)),
-                SyscallFailsWithErrno(EINVAL));
-  }
-  {
-    constexpr int tcp_max_seg = 75000;
-    ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_MAXSEG, &tcp_max_seg,
-                           sizeof(tcp_max_seg)),
-                SyscallFailsWithErrno(EINVAL));
-  }
-}
-
-TEST_P(SimpleTcpSocketTest, SetTCPUserTimeout) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  {
-    constexpr int kTCPUserTimeout = -1;
-    EXPECT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_USER_TIMEOUT,
-                           &kTCPUserTimeout, sizeof(kTCPUserTimeout)),
-                SyscallFailsWithErrno(EINVAL));
-  }
-
-  // kTCPUserTimeout is in milliseconds.
-  constexpr int kTCPUserTimeout = 100;
-  ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_USER_TIMEOUT,
-                         &kTCPUserTimeout, sizeof(kTCPUserTimeout)),
-              SyscallSucceedsWithValue(0));
-  int get = -1;
-  socklen_t get_len = sizeof(get);
-  ASSERT_THAT(
-      getsockopt(s.get(), IPPROTO_TCP, TCP_USER_TIMEOUT, &get, &get_len),
-      SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_len, sizeof(get));
-  EXPECT_EQ(get, kTCPUserTimeout);
-}
-
-TEST_P(SimpleTcpSocketTest, SetTCPDeferAcceptNeg) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  // -ve TCP_DEFER_ACCEPT is same as setting it to zero.
-  constexpr int kNeg = -1;
-  EXPECT_THAT(
-      setsockopt(s.get(), IPPROTO_TCP, TCP_DEFER_ACCEPT, &kNeg, sizeof(kNeg)),
-      SyscallSucceeds());
-  int get = -1;
-  socklen_t get_len = sizeof(get);
-  ASSERT_THAT(
-      getsockopt(s.get(), IPPROTO_TCP, TCP_USER_TIMEOUT, &get, &get_len),
-      SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_len, sizeof(get));
-  EXPECT_EQ(get, 0);
-}
-
-TEST_P(SimpleTcpSocketTest, GetTCPDeferAcceptDefault) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-
-  int get = -1;
-  socklen_t get_len = sizeof(get);
-  ASSERT_THAT(
-      getsockopt(s.get(), IPPROTO_TCP, TCP_USER_TIMEOUT, &get, &get_len),
-      SyscallSucceedsWithValue(0));
-  EXPECT_EQ(get_len, sizeof(get));
-  EXPECT_EQ(get, 0);
-}
-
-TEST_P(SimpleTcpSocketTest, SetTCPDeferAcceptGreaterThanZero) {
-  FileDescriptor s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-  // kTCPDeferAccept is in seconds.
-  // NOTE: linux translates seconds to # of retries and back from
-  //   #of retries to seconds. Which means only certain values
-  //   translate back exactly. That's why we use 3 here, a value of
-  //   5 will result in us getting back 7 instead of 5 in the
-  //   getsockopt.
-  constexpr int kTCPDeferAccept = 3;
-  ASSERT_THAT(setsockopt(s.get(), IPPROTO_TCP, TCP_DEFER_ACCEPT,
-                         &kTCPDeferAccept, sizeof(kTCPDeferAccept)),
-              SyscallSucceeds());
-  int get = -1;
-  socklen_t get_len = sizeof(get);
-  ASSERT_THAT(
-      getsockopt(s.get(), IPPROTO_TCP, TCP_DEFER_ACCEPT, &get, &get_len),
-      SyscallSucceeds());
-  EXPECT_EQ(get_len, sizeof(get));
-  EXPECT_EQ(get, kTCPDeferAccept);
-}
-
-TEST_P(SimpleTcpSocketTest, RecvOnClosedSocket) {
-  auto s =
-      ASSERT_NO_ERRNO_AND_VALUE(Socket(GetParam(), SOCK_STREAM, IPPROTO_TCP));
-  char buf[1];
-  EXPECT_THAT(recv(s.get(), buf, 0, 0), SyscallFailsWithErrno(ENOTCONN));
-  EXPECT_THAT(recv(s.get(), buf, sizeof(buf), 0),
-              SyscallFailsWithErrno(ENOTCONN));
-}
-
-INSTANTIATE_TEST_SUITE_P(AllInetTests, SimpleTcpSocketTest,
-                         ::testing::Values(AF_INET, AF_INET6));
-
-}  // namespace
-
-}  // namespace testing
-}  // namespace gvisor