164 lines
5.2 KiB
C++
164 lines
5.2 KiB
C++
// Copyright 2019 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 <errno.h>
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#include <stdlib.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 <string>
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#include <tuple>
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#include "gtest/gtest.h"
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#include "test/syscalls/linux/socket_test_util.h"
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#include "test/util/file_descriptor.h"
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#include "test/util/fs_util.h"
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#include "test/util/test_util.h"
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// This file contains tests specific to connecting to host UDS managed outside
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// the sandbox / test.
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//
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// A set of ultity sockets will be created externally in $TEST_UDS_TREE and
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// $TEST_UDS_ATTACH_TREE for these tests to interact with.
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namespace gvisor {
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namespace testing {
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namespace {
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struct ProtocolSocket {
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int protocol;
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std::string name;
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};
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// Parameter is (socket root dir, ProtocolSocket).
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using GoferStreamSeqpacketTest =
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::testing::TestWithParam<std::tuple<std::string, ProtocolSocket>>;
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// Connect to a socket and verify that write/read work.
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//
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// An "echo" socket doesn't work for dgram sockets because our socket is
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// unnamed. The server thus has no way to reply to us.
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TEST_P(GoferStreamSeqpacketTest, Echo) {
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std::string env;
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ProtocolSocket proto;
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std::tie(env, proto) = GetParam();
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char *val = getenv(env.c_str());
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ASSERT_NE(val, nullptr);
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std::string root(val);
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FileDescriptor sock =
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ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, proto.protocol, 0));
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std::string socket_path = JoinPath(root, proto.name, "echo");
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struct sockaddr_un addr = {};
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addr.sun_family = AF_UNIX;
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memcpy(addr.sun_path, socket_path.c_str(), socket_path.length());
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ASSERT_THAT(connect(sock.get(), reinterpret_cast<struct sockaddr *>(&addr),
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sizeof(addr)),
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SyscallSucceeds());
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constexpr int kBufferSize = 64;
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char send_buffer[kBufferSize];
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memset(send_buffer, 'a', sizeof(send_buffer));
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ASSERT_THAT(WriteFd(sock.get(), send_buffer, sizeof(send_buffer)),
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SyscallSucceedsWithValue(sizeof(send_buffer)));
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char recv_buffer[kBufferSize];
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ASSERT_THAT(ReadFd(sock.get(), recv_buffer, sizeof(recv_buffer)),
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SyscallSucceedsWithValue(sizeof(recv_buffer)));
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ASSERT_EQ(0, memcmp(send_buffer, recv_buffer, sizeof(send_buffer)));
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}
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// It is not possible to connect to a bound but non-listening socket.
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TEST_P(GoferStreamSeqpacketTest, NonListening) {
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std::string env;
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ProtocolSocket proto;
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std::tie(env, proto) = GetParam();
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char *val = getenv(env.c_str());
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ASSERT_NE(val, nullptr);
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std::string root(val);
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FileDescriptor sock =
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ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, proto.protocol, 0));
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std::string socket_path = JoinPath(root, proto.name, "nonlistening");
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struct sockaddr_un addr = {};
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addr.sun_family = AF_UNIX;
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memcpy(addr.sun_path, socket_path.c_str(), socket_path.length());
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ASSERT_THAT(connect(sock.get(), reinterpret_cast<struct sockaddr *>(&addr),
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sizeof(addr)),
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SyscallFailsWithErrno(ECONNREFUSED));
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}
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INSTANTIATE_TEST_SUITE_P(
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StreamSeqpacket, GoferStreamSeqpacketTest,
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::testing::Combine(
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// Test access via standard path and attach point.
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::testing::Values("TEST_UDS_TREE", "TEST_UDS_ATTACH_TREE"),
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::testing::Values(ProtocolSocket{SOCK_STREAM, "stream"},
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ProtocolSocket{SOCK_SEQPACKET, "seqpacket"})));
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// Parameter is socket root dir.
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using GoferDgramTest = ::testing::TestWithParam<std::string>;
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// Connect to a socket and verify that write works.
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//
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// An "echo" socket doesn't work for dgram sockets because our socket is
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// unnamed. The server thus has no way to reply to us.
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TEST_P(GoferDgramTest, Null) {
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std::string env = GetParam();
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char *val = getenv(env.c_str());
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ASSERT_NE(val, nullptr);
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std::string root(val);
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FileDescriptor sock =
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ASSERT_NO_ERRNO_AND_VALUE(Socket(AF_UNIX, SOCK_DGRAM, 0));
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std::string socket_path = JoinPath(root, "dgram/null");
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struct sockaddr_un addr = {};
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addr.sun_family = AF_UNIX;
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memcpy(addr.sun_path, socket_path.c_str(), socket_path.length());
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ASSERT_THAT(connect(sock.get(), reinterpret_cast<struct sockaddr *>(&addr),
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sizeof(addr)),
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SyscallSucceeds());
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constexpr int kBufferSize = 64;
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char send_buffer[kBufferSize];
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memset(send_buffer, 'a', sizeof(send_buffer));
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ASSERT_THAT(WriteFd(sock.get(), send_buffer, sizeof(send_buffer)),
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SyscallSucceedsWithValue(sizeof(send_buffer)));
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}
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INSTANTIATE_TEST_SUITE_P(Dgram, GoferDgramTest,
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// Test access via standard path and attach point.
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::testing::Values("TEST_UDS_TREE",
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"TEST_UDS_ATTACH_TREE"));
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} // namespace
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} // namespace testing
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} // namespace gvisor
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