2019-04-29 21:25:05 +00:00
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// Copyright 2018 The gVisor Authors.
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2018-12-10 22:41:40 +00:00
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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_stream.h"
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#include <stdio.h>
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#include <sys/socket.h>
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#include <sys/types.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 "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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TEST_P(StreamSocketPairTest, SplitRecv) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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char sent_data[512];
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RandomizeBuffer(sent_data, sizeof(sent_data));
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ASSERT_THAT(
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RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0),
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SyscallSucceedsWithValue(sizeof(sent_data)));
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char received_data[sizeof(sent_data) / 2];
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(received_data), 0),
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SyscallSucceedsWithValue(sizeof(received_data)));
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EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(received_data)));
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(received_data), 0),
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SyscallSucceedsWithValue(sizeof(received_data)));
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EXPECT_EQ(0, memcmp(sent_data + sizeof(received_data), received_data,
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sizeof(received_data)));
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}
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// Stream sockets allow data sent with multiple sends to be read in a single
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// recv.
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//
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// CoalescedRecv checks that multiple messages are readable in a single recv.
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TEST_P(StreamSocketPairTest, CoalescedRecv) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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char sent_data1[20];
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RandomizeBuffer(sent_data1, sizeof(sent_data1));
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ASSERT_THAT(
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RetryEINTR(send)(sockets->first_fd(), sent_data1, sizeof(sent_data1), 0),
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SyscallSucceedsWithValue(sizeof(sent_data1)));
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char sent_data2[20];
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RandomizeBuffer(sent_data2, sizeof(sent_data2));
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ASSERT_THAT(
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RetryEINTR(send)(sockets->first_fd(), sent_data2, sizeof(sent_data2), 0),
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SyscallSucceedsWithValue(sizeof(sent_data2)));
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char received_data[sizeof(sent_data1) + sizeof(sent_data2)];
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(received_data), 0),
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SyscallSucceedsWithValue(sizeof(received_data)));
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EXPECT_EQ(0, memcmp(sent_data1, received_data, sizeof(sent_data1)));
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EXPECT_EQ(0, memcmp(sent_data2, received_data + sizeof(sent_data1),
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sizeof(sent_data2)));
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}
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TEST_P(StreamSocketPairTest, 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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const char str[] = "abc";
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ASSERT_THAT(write(sockets->second_fd(), str, 3),
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SyscallFailsWithErrno(EPIPE));
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}
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2019-04-19 23:15:37 +00:00
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TEST_P(StreamSocketPairTest, RecvmsgMsghdrFlagsNoMsgTrunc) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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char sent_data[10];
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RandomizeBuffer(sent_data, sizeof(sent_data));
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ASSERT_THAT(
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RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0),
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SyscallSucceedsWithValue(sizeof(sent_data)));
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char received_data[sizeof(sent_data) / 2] = {};
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struct iovec iov;
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iov.iov_base = received_data;
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iov.iov_len = sizeof(received_data);
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struct msghdr msg = {};
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msg.msg_flags = -1;
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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ASSERT_THAT(RetryEINTR(recvmsg)(sockets->second_fd(), &msg, 0),
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SyscallSucceedsWithValue(sizeof(received_data)));
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EXPECT_EQ(0, memcmp(received_data, sent_data, sizeof(received_data)));
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// Check that msghdr flags were cleared (MSG_TRUNC was not set).
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2020-01-09 00:35:43 +00:00
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ASSERT_EQ(msg.msg_flags & MSG_TRUNC, 0);
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}
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TEST_P(StreamSocketPairTest, RecvmsgTruncZeroLen) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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char sent_data[10];
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RandomizeBuffer(sent_data, sizeof(sent_data));
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ASSERT_THAT(
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RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0),
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SyscallSucceedsWithValue(sizeof(sent_data)));
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char received_data[0] = {};
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struct iovec iov;
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iov.iov_base = received_data;
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iov.iov_len = sizeof(received_data);
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struct msghdr msg = {};
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msg.msg_flags = -1;
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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ASSERT_THAT(RetryEINTR(recvmsg)(sockets->second_fd(), &msg, MSG_TRUNC),
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SyscallSucceedsWithValue(0));
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// Check that msghdr flags were cleared (MSG_TRUNC was not set).
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ASSERT_EQ(msg.msg_flags & MSG_TRUNC, 0);
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}
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TEST_P(StreamSocketPairTest, RecvmsgTruncPeekZeroLen) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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char sent_data[10];
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RandomizeBuffer(sent_data, sizeof(sent_data));
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ASSERT_THAT(
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RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0),
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SyscallSucceedsWithValue(sizeof(sent_data)));
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char received_data[0] = {};
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struct iovec iov;
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iov.iov_base = received_data;
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iov.iov_len = sizeof(received_data);
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struct msghdr msg = {};
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msg.msg_flags = -1;
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msg.msg_iov = &iov;
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msg.msg_iovlen = 1;
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ASSERT_THAT(
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RetryEINTR(recvmsg)(sockets->second_fd(), &msg, MSG_TRUNC | MSG_PEEK),
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SyscallSucceedsWithValue(0));
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// Check that msghdr flags were cleared (MSG_TRUNC was not set).
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ASSERT_EQ(msg.msg_flags & MSG_TRUNC, 0);
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2019-04-19 23:15:37 +00:00
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}
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2018-12-10 22:41:40 +00:00
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TEST_P(StreamSocketPairTest, MsgTrunc) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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char sent_data[512];
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RandomizeBuffer(sent_data, sizeof(sent_data));
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ASSERT_THAT(
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RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0),
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SyscallSucceedsWithValue(sizeof(sent_data)));
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char received_data[sizeof(sent_data)];
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(received_data) / 2, MSG_TRUNC),
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SyscallSucceedsWithValue(sizeof(sent_data) / 2));
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EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(sent_data) / 2));
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}
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} // namespace testing
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} // namespace gvisor
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