116 lines
4.0 KiB
C++
116 lines
4.0 KiB
C++
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "test/syscalls/linux/socket_unix_seqpacket.h"
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#include <stdio.h>
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#include <sys/un.h>
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#include "gtest/gtest.h"
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#include "absl/time/clock.h"
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#include "absl/time/time.h"
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#include "test/syscalls/linux/socket_test_util.h"
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#include "test/syscalls/linux/unix_domain_socket_test_util.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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TEST_P(SeqpacketUnixSocketPairTest, WriteOneSideClosed) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
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constexpr char kStr[] = "abc";
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ASSERT_THAT(write(sockets->second_fd(), kStr, 3),
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SyscallFailsWithErrno(EPIPE));
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}
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TEST_P(SeqpacketUnixSocketPairTest, ReadOneSideClosed) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds());
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char data[10] = {};
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ASSERT_THAT(read(sockets->second_fd(), data, sizeof(data)),
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SyscallSucceedsWithValue(0));
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}
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TEST_P(SeqpacketUnixSocketPairTest, Sendto) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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struct sockaddr_un addr = {};
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addr.sun_family = AF_UNIX;
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constexpr char kPath[] = "\0nonexistent";
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memcpy(addr.sun_path, kPath, sizeof(kPath));
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constexpr char kStr[] = "abc";
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ASSERT_THAT(sendto(sockets->second_fd(), kStr, 3, 0, (struct sockaddr*)&addr,
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sizeof(addr)),
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SyscallSucceedsWithValue(3));
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char data[10] = {};
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ASSERT_THAT(read(sockets->first_fd(), data, sizeof(data)),
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SyscallSucceedsWithValue(3));
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}
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TEST_P(SeqpacketUnixSocketPairTest, IncreasedSocketSendBufUnblocksWrites) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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int sock = sockets->first_fd();
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int buf_size = 0;
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socklen_t buf_size_len = sizeof(buf_size);
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ASSERT_THAT(getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &buf_size, &buf_size_len),
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SyscallSucceeds());
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int opts;
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ASSERT_THAT(opts = fcntl(sock, F_GETFL), SyscallSucceeds());
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opts |= O_NONBLOCK;
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ASSERT_THAT(fcntl(sock, F_SETFL, opts), SyscallSucceeds());
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std::vector<char> buf(buf_size / 4);
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// Write till the socket buffer is full.
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while (RetryEINTR(send)(sock, buf.data(), buf.size(), 0) != -1) {
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// Sleep to give linux a chance to move data from the send buffer to the
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// receive buffer.
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absl::SleepFor(absl::Milliseconds(10)); // 10ms.
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}
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// The last error should have been EWOULDBLOCK.
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ASSERT_EQ(errno, EWOULDBLOCK);
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// Now increase the socket send buffer.
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buf_size = buf_size * 2;
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ASSERT_THAT(
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setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &buf_size, sizeof(buf_size)),
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SyscallSucceeds());
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// Skip test if the setsockopt didn't increase the sendbuf. This happens for
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// tests where the socket is a host fd where gVisor does not permit increasing
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// send buffer size.
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int new_buf_size = 0;
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buf_size_len = sizeof(new_buf_size);
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ASSERT_THAT(
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getsockopt(sock, SOL_SOCKET, SO_SNDBUF, &new_buf_size, &buf_size_len),
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SyscallSucceeds());
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if (IsRunningOnGvisor() && (new_buf_size <= buf_size)) {
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GTEST_SKIP() << "Skipping test new send buffer size " << new_buf_size
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<< " is the same as the value before setsockopt, "
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<< " socket is probably a host backed socket." << std ::endl;
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}
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// send should succeed again.
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ASSERT_THAT(RetryEINTR(send)(sock, buf.data(), buf.size(), 0),
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SyscallSucceeds());
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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