175 lines
7.4 KiB
C++
175 lines
7.4 KiB
C++
// Copyright 2018 Google LLC
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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_non_stream.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 "gtest/gtest.h"
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#include "test/syscalls/linux/ip_socket_test_util.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(NonStreamSocketPairTest, SendMsgTooLarge) {
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auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
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int sndbuf;
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socklen_t length = sizeof(sndbuf);
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ASSERT_THAT(
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getsockopt(sockets->first_fd(), SOL_SOCKET, SO_SNDBUF, &sndbuf, &length),
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SyscallSucceeds());
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// Make the call too large to fit in the send buffer.
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const int buffer_size = 3 * sndbuf;
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EXPECT_THAT(SendLargeSendMsg(sockets, buffer_size, false /* reader */),
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SyscallFailsWithErrno(EMSGSIZE));
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}
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// Stream sockets allow data sent with a single (e.g. write, sendmsg) syscall
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// to be read in pieces with multiple (e.g. read, recvmsg) syscalls.
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//
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// SplitRecv checks that control messages can only be read on the first (e.g.
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// read, recvmsg) syscall, even if it doesn't provide space for the control
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// message.
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TEST_P(NonStreamSocketPairTest, 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), MSG_DONTWAIT),
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SyscallFailsWithErrno(EWOULDBLOCK));
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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. Datagram sockets do not.
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//
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// SingleRecv checks that only a single message is readable in a single recv.
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TEST_P(NonStreamSocketPairTest, SingleRecv) {
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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(sent_data1)));
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EXPECT_EQ(0, memcmp(sent_data1, received_data, sizeof(sent_data1)));
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}
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// Stream sockets allow data sent with multiple sends to be peeked at in a
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// single recv. Datagram sockets (except for unix sockets) do not.
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//
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// SinglePeek checks that only a single message is peekable in a single recv.
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TEST_P(NonStreamSocketPairTest, SinglePeek) {
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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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for (int i = 0; i < 3; i++) {
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memset(received_data, 0, sizeof(received_data));
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(received_data), MSG_PEEK),
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SyscallSucceedsWithValue(sizeof(sent_data1)));
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EXPECT_EQ(0, memcmp(sent_data1, received_data, sizeof(sent_data1)));
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}
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(sent_data1), 0),
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SyscallSucceedsWithValue(sizeof(sent_data1)));
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EXPECT_EQ(0, memcmp(sent_data1, received_data, sizeof(sent_data1)));
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(sent_data2), 0),
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SyscallSucceedsWithValue(sizeof(sent_data2)));
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EXPECT_EQ(0, memcmp(sent_data2, received_data, sizeof(sent_data2)));
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}
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TEST_P(NonStreamSocketPairTest, MsgTruncTruncation) {
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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)));
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EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(sent_data) / 2));
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// Check that we didn't get any extra data.
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EXPECT_NE(0, memcmp(sent_data + sizeof(sent_data) / 2,
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received_data + sizeof(received_data) / 2,
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sizeof(sent_data) / 2));
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}
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TEST_P(NonStreamSocketPairTest, MsgTruncSameSize) {
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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), MSG_TRUNC),
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SyscallSucceedsWithValue(sizeof(received_data)));
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EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(sent_data)));
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}
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TEST_P(NonStreamSocketPairTest, MsgTruncNotFull) {
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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[2 * sizeof(sent_data)];
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ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data,
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sizeof(received_data), MSG_TRUNC),
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SyscallSucceedsWithValue(sizeof(sent_data)));
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EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(sent_data)));
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}
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} // namespace testing
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} // namespace gvisor
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