// 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 "test/syscalls/linux/socket_stream.h" #include <stdio.h> #include <sys/socket.h> #include <sys/types.h> #include <sys/un.h> #include "gtest/gtest.h" #include "absl/time/clock.h" #include "test/syscalls/linux/socket_test_util.h" #include "test/syscalls/linux/unix_domain_socket_test_util.h" #include "test/util/test_util.h" namespace gvisor { namespace testing { TEST_P(StreamSocketPairTest, SplitRecv) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); char sent_data[512]; RandomizeBuffer(sent_data, sizeof(sent_data)); ASSERT_THAT( RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0), SyscallSucceedsWithValue(sizeof(sent_data))); char received_data[sizeof(sent_data) / 2]; ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data, sizeof(received_data), 0), SyscallSucceedsWithValue(sizeof(received_data))); EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(received_data))); ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data, sizeof(received_data), 0), SyscallSucceedsWithValue(sizeof(received_data))); EXPECT_EQ(0, memcmp(sent_data + sizeof(received_data), received_data, sizeof(received_data))); } // Stream sockets allow data sent with multiple sends to be read in a single // recv. // // CoalescedRecv checks that multiple messages are readable in a single recv. TEST_P(StreamSocketPairTest, CoalescedRecv) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); char sent_data1[20]; RandomizeBuffer(sent_data1, sizeof(sent_data1)); ASSERT_THAT( RetryEINTR(send)(sockets->first_fd(), sent_data1, sizeof(sent_data1), 0), SyscallSucceedsWithValue(sizeof(sent_data1))); char sent_data2[20]; RandomizeBuffer(sent_data2, sizeof(sent_data2)); ASSERT_THAT( RetryEINTR(send)(sockets->first_fd(), sent_data2, sizeof(sent_data2), 0), SyscallSucceedsWithValue(sizeof(sent_data2))); char received_data[sizeof(sent_data1) + sizeof(sent_data2)]; ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data, sizeof(received_data), 0), SyscallSucceedsWithValue(sizeof(received_data))); EXPECT_EQ(0, memcmp(sent_data1, received_data, sizeof(sent_data1))); EXPECT_EQ(0, memcmp(sent_data2, received_data + sizeof(sent_data1), sizeof(sent_data2))); } TEST_P(StreamSocketPairTest, WriteOneSideClosed) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); ASSERT_THAT(close(sockets->release_first_fd()), SyscallSucceeds()); const char str[] = "abc"; ASSERT_THAT(write(sockets->second_fd(), str, 3), SyscallFailsWithErrno(EPIPE)); } TEST_P(StreamSocketPairTest, RecvmsgMsghdrFlagsNoMsgTrunc) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); char sent_data[10]; RandomizeBuffer(sent_data, sizeof(sent_data)); ASSERT_THAT( RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0), SyscallSucceedsWithValue(sizeof(sent_data))); char received_data[sizeof(sent_data) / 2] = {}; struct iovec iov; iov.iov_base = received_data; iov.iov_len = sizeof(received_data); struct msghdr msg = {}; msg.msg_flags = -1; msg.msg_iov = &iov; msg.msg_iovlen = 1; ASSERT_THAT(RetryEINTR(recvmsg)(sockets->second_fd(), &msg, 0), SyscallSucceedsWithValue(sizeof(received_data))); EXPECT_EQ(0, memcmp(received_data, sent_data, sizeof(received_data))); // Check that msghdr flags were cleared (MSG_TRUNC was not set). ASSERT_EQ(msg.msg_flags & MSG_TRUNC, 0); } TEST_P(StreamSocketPairTest, RecvmsgTruncZeroLen) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); char sent_data[10]; RandomizeBuffer(sent_data, sizeof(sent_data)); ASSERT_THAT( RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0), SyscallSucceedsWithValue(sizeof(sent_data))); char received_data[0] = {}; struct iovec iov; iov.iov_base = received_data; iov.iov_len = sizeof(received_data); struct msghdr msg = {}; msg.msg_flags = -1; msg.msg_iov = &iov; msg.msg_iovlen = 1; ASSERT_THAT(RetryEINTR(recvmsg)(sockets->second_fd(), &msg, MSG_TRUNC), SyscallSucceedsWithValue(0)); // Check that msghdr flags were cleared (MSG_TRUNC was not set). ASSERT_EQ(msg.msg_flags & MSG_TRUNC, 0); } TEST_P(StreamSocketPairTest, RecvmsgTruncPeekZeroLen) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); char sent_data[10]; RandomizeBuffer(sent_data, sizeof(sent_data)); ASSERT_THAT( RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0), SyscallSucceedsWithValue(sizeof(sent_data))); char received_data[0] = {}; struct iovec iov; iov.iov_base = received_data; iov.iov_len = sizeof(received_data); struct msghdr msg = {}; msg.msg_flags = -1; msg.msg_iov = &iov; msg.msg_iovlen = 1; ASSERT_THAT( RetryEINTR(recvmsg)(sockets->second_fd(), &msg, MSG_TRUNC | MSG_PEEK), SyscallSucceedsWithValue(0)); // Check that msghdr flags were cleared (MSG_TRUNC was not set). ASSERT_EQ(msg.msg_flags & MSG_TRUNC, 0); } TEST_P(StreamSocketPairTest, MsgTrunc) { auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair()); char sent_data[512]; RandomizeBuffer(sent_data, sizeof(sent_data)); ASSERT_THAT( RetryEINTR(send)(sockets->first_fd(), sent_data, sizeof(sent_data), 0), SyscallSucceedsWithValue(sizeof(sent_data))); char received_data[sizeof(sent_data)]; ASSERT_THAT(RetryEINTR(recv)(sockets->second_fd(), received_data, sizeof(received_data) / 2, MSG_TRUNC), SyscallSucceedsWithValue(sizeof(sent_data) / 2)); EXPECT_EQ(0, memcmp(sent_data, received_data, sizeof(sent_data) / 2)); } } // namespace testing } // namespace gvisor