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|
// Copyright 2019 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 <arpa/inet.h>
#include <linux/capability.h>
#include <linux/if_tun.h>
#include <net/if.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <cstdio>
#include <cstring>
#include <map>
#include <memory>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "test/syscalls/linux/ip_socket_test_util.h"
#include "test/syscalls/linux/socket_bind_to_device_util.h"
#include "test/syscalls/linux/socket_test_util.h"
#include "test/util/capability_util.h"
#include "test/util/test_util.h"
#include "test/util/thread_util.h"
namespace gvisor {
namespace testing {
using std::string;
using std::vector;
// Test fixture for SO_BINDTODEVICE tests the results of sequences of socket
// binding.
class BindToDeviceSequenceTest : public ::testing::TestWithParam<SocketKind> {
protected:
void SetUp() override {
printf("Testing case: %s\n", GetParam().description.c_str());
ASSERT_TRUE(ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_NET_RAW)))
<< "CAP_NET_RAW is required to use SO_BINDTODEVICE";
socket_factory_ = GetParam();
interface_names_ = GetInterfaceNames();
}
PosixErrorOr<std::unique_ptr<FileDescriptor>> NewSocket() const {
return socket_factory_.Create();
}
// Gets a device by device_id. If the device_id has been seen before, returns
// the previously returned device. If not, finds or creates a new device.
// Returns an empty string on failure.
void GetDevice(int device_id, string* device_name) {
auto device = devices_.find(device_id);
if (device != devices_.end()) {
*device_name = device->second;
return;
}
// Need to pick a new device. Try ethernet first.
*device_name = absl::StrCat("eth", next_unused_eth_);
if (interface_names_.find(*device_name) != interface_names_.end()) {
devices_[device_id] = *device_name;
next_unused_eth_++;
return;
}
// Need to make a new tunnel device. gVisor tests should have enough
// ethernet devices to never reach here.
ASSERT_FALSE(IsRunningOnGvisor());
// Need a tunnel.
tunnels_.push_back(ASSERT_NO_ERRNO_AND_VALUE(Tunnel::New()));
devices_[device_id] = tunnels_.back()->GetName();
*device_name = devices_[device_id];
}
// Release the socket
void ReleaseSocket(int socket_id) {
// Close the socket that was made in a previous action. The socket_id
// indicates which socket to close based on index into the list of actions.
sockets_to_close_.erase(socket_id);
}
// SetDevice changes the bind_to_device option. It does not bind or re-bind.
void SetDevice(int socket_id, int device_id) {
auto socket_fd = sockets_to_close_[socket_id]->get();
string device_name;
ASSERT_NO_FATAL_FAILURE(GetDevice(device_id, &device_name));
EXPECT_THAT(setsockopt(socket_fd, SOL_SOCKET, SO_BINDTODEVICE,
device_name.c_str(), device_name.size() + 1),
SyscallSucceedsWithValue(0));
}
// Bind a socket with the reuse options and bind_to_device options. Checks
// that all steps succeed and that the bind command's error matches want.
// Sets the socket_id to uniquely identify the socket bound if it is not
// nullptr.
void BindSocket(bool reuse_port, bool reuse_addr, int device_id = 0,
int want = 0, int* socket_id = nullptr) {
next_socket_id_++;
sockets_to_close_[next_socket_id_] = ASSERT_NO_ERRNO_AND_VALUE(NewSocket());
auto socket_fd = sockets_to_close_[next_socket_id_]->get();
if (socket_id != nullptr) {
*socket_id = next_socket_id_;
}
// If reuse_port is indicated, do that.
if (reuse_port) {
EXPECT_THAT(setsockopt(socket_fd, SOL_SOCKET, SO_REUSEPORT, &kSockOptOn,
sizeof(kSockOptOn)),
SyscallSucceedsWithValue(0));
}
// If reuse_addr is indicated, do that.
if (reuse_addr) {
EXPECT_THAT(setsockopt(socket_fd, SOL_SOCKET, SO_REUSEADDR, &kSockOptOn,
sizeof(kSockOptOn)),
SyscallSucceedsWithValue(0));
}
// If the device is non-zero, bind to that device.
if (device_id != 0) {
string device_name;
ASSERT_NO_FATAL_FAILURE(GetDevice(device_id, &device_name));
EXPECT_THAT(setsockopt(socket_fd, SOL_SOCKET, SO_BINDTODEVICE,
device_name.c_str(), device_name.size() + 1),
SyscallSucceedsWithValue(0));
char get_device[100];
socklen_t get_device_size = 100;
EXPECT_THAT(getsockopt(socket_fd, SOL_SOCKET, SO_BINDTODEVICE, get_device,
&get_device_size),
SyscallSucceedsWithValue(0));
}
struct sockaddr_in addr = {};
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr.sin_port = port_;
if (want == 0) {
ASSERT_THAT(
bind(socket_fd, reinterpret_cast<const struct sockaddr*>(&addr),
sizeof(addr)),
SyscallSucceeds());
} else {
ASSERT_THAT(
bind(socket_fd, reinterpret_cast<const struct sockaddr*>(&addr),
sizeof(addr)),
SyscallFailsWithErrno(want));
}
if (port_ == 0) {
// We don't yet know what port we'll be using so we need to fetch it and
// remember it for future commands.
socklen_t addr_size = sizeof(addr);
ASSERT_THAT(
getsockname(socket_fd, reinterpret_cast<struct sockaddr*>(&addr),
&addr_size),
SyscallSucceeds());
port_ = addr.sin_port;
}
}
private:
SocketKind socket_factory_;
// devices maps from the device id in the test case to the name of the device.
std::unordered_map<int, string> devices_;
// These are the tunnels that were created for the test and will be destroyed
// by the destructor.
vector<std::unique_ptr<Tunnel>> tunnels_;
// A list of all interface names before the test started.
std::unordered_set<string> interface_names_;
// The next ethernet device to use when requested a device.
int next_unused_eth_ = 1;
// The port for all tests. Originally 0 (any) and later set to the port that
// all further commands will use.
in_port_t port_ = 0;
// sockets_to_close_ is a map from action index to the socket that was
// created.
std::unordered_map<int,
std::unique_ptr<gvisor::testing::FileDescriptor>>
sockets_to_close_;
int next_socket_id_ = 0;
};
TEST_P(BindToDeviceSequenceTest, BindTwiceWithDeviceFails) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ false, /* bind_to_device */ 3));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 3, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindToDevice) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ false, /* bind_to_device */ 1));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ false, /* bind_to_device */ 2));
}
TEST_P(BindToDeviceSequenceTest, BindToDeviceAndThenWithoutDevice) {
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindWithoutDevice) {
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 123, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindWithDevice) {
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123, 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 123, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 456, 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 789, 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindWithReuse) {
ASSERT_NO_FATAL_FAILURE(
BindSocket(/* reusePort */ true, /* reuse_addr */ false));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false,
/* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 0));
}
TEST_P(BindToDeviceSequenceTest, BindingWithReuseAndDevice) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 456));
ASSERT_NO_FATAL_FAILURE(
BindSocket(/* reuse_port */ true, /* reuse_addr */ false));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 789));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 999, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, MixingReuseAndNotReuseByBindingToDevice) {
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 123, 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 456, 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 789, 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 999, 0));
}
TEST_P(BindToDeviceSequenceTest, CannotBindTo0AfterMixingReuseAndNotReuse) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 456));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindAndRelease) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 123));
int to_release;
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, 0, &to_release));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 345, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 789));
// Release the bind to device 0 and try again.
ASSERT_NO_FATAL_FAILURE(ReleaseSocket(to_release));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 345));
}
TEST_P(BindToDeviceSequenceTest, BindTwiceWithReuseOnce) {
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindWithReuseAddr) {
// FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets.
SKIP_IF(IsRunningOnGvisor());
ASSERT_NO_FATAL_FAILURE(
BindSocket(/* reusePort */ false, /* reuse_addr */ true));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 123, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ true, /* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ true, /* bind_to_device */ 0));
}
TEST_P(BindToDeviceSequenceTest,
CannotBindTo0AfterMixingReuseAddrAndNotReuseAddr) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 123));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 456));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ true,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindReuseAddrReusePortThenReusePort) {
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ true,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindReuseAddrReusePortThenReuseAddr) {
// FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets.
SKIP_IF(IsRunningOnGvisor());
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindDoubleReuseAddrReusePortThenReusePort) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ true, /* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ true,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindDoubleReuseAddrReusePortThenReuseAddr) {
// FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets.
SKIP_IF(IsRunningOnGvisor());
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ true, /* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindReusePortThenReuseAddrReusePort) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ true, /* reuse_addr */ false, /* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ true,
/* bind_to_device */ 0, EADDRINUSE));
}
TEST_P(BindToDeviceSequenceTest, BindReuseAddrThenReuseAddr) {
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ true, /* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0, EADDRINUSE));
}
// This behavior seems like a bug?
TEST_P(BindToDeviceSequenceTest,
BindReuseAddrThenReuseAddrReusePortThenReuseAddr) {
// FIXME(b/129164367): Support SO_REUSEADDR on UDP sockets.
SKIP_IF(IsRunningOnGvisor());
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ true, /* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ true,
/* bind_to_device */ 0));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ true,
/* reuse_addr */ false,
/* bind_to_device */ 0));
}
// Repro test for gvisor.dev/issue/1217. Not replicated in ports_test.go as this
// test is different from the others and wouldn't fit well there.
TEST_P(BindToDeviceSequenceTest, BindAndReleaseDifferentDevice) {
int to_release;
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 3, 0, &to_release));
ASSERT_NO_FATAL_FAILURE(BindSocket(/* reuse_port */ false,
/* reuse_addr */ false,
/* bind_to_device */ 3, EADDRINUSE));
// Change the device. Since the socket was already bound, this should have no
// effect.
SetDevice(to_release, 2);
// Release the bind to device 3 and try again.
ASSERT_NO_FATAL_FAILURE(ReleaseSocket(to_release));
ASSERT_NO_FATAL_FAILURE(BindSocket(
/* reuse_port */ false, /* reuse_addr */ false, /* bind_to_device */ 3));
}
INSTANTIATE_TEST_SUITE_P(BindToDeviceTest, BindToDeviceSequenceTest,
::testing::Values(IPv4UDPUnboundSocket(0),
IPv4TCPUnboundSocket(0)));
} // namespace testing
} // namespace gvisor
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