84 lines
2.5 KiB
C++
84 lines
2.5 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 <linux/filter.h>
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#include <linux/netlink.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "gtest/gtest.h"
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#include "test/syscalls/linux/socket_netlink_util.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/test_util.h"
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// Tests for NETLINK_KOBJECT_UEVENT sockets.
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//
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// gVisor never sends any messages on these sockets, so we don't test the events
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// themselves.
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namespace gvisor {
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namespace testing {
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namespace {
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// SO_PASSCRED can be enabled. Since no messages are sent in gVisor, we don't
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// actually test receiving credentials.
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TEST(NetlinkUeventTest, PassCred) {
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FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(NetlinkBoundSocket(NETLINK_KOBJECT_UEVENT));
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EXPECT_THAT(setsockopt(fd.get(), SOL_SOCKET, SO_PASSCRED, &kSockOptOn,
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sizeof(kSockOptOn)),
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SyscallSucceeds());
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}
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// SO_DETACH_FILTER fails without a filter already installed.
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TEST(NetlinkUeventTest, DetachNoFilter) {
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FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(NetlinkBoundSocket(NETLINK_KOBJECT_UEVENT));
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int opt;
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EXPECT_THAT(
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setsockopt(fd.get(), SOL_SOCKET, SO_DETACH_FILTER, &opt, sizeof(opt)),
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SyscallFailsWithErrno(ENOENT));
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}
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// We can attach a BPF filter.
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TEST(NetlinkUeventTest, AttachFilter) {
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FileDescriptor fd =
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ASSERT_NO_ERRNO_AND_VALUE(NetlinkBoundSocket(NETLINK_KOBJECT_UEVENT));
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// Minimal BPF program: a single ret.
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struct sock_filter filter = {0x6, 0, 0, 0};
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struct sock_fprog prog = {};
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prog.len = 1;
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prog.filter = &filter;
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EXPECT_THAT(
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setsockopt(fd.get(), SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)),
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SyscallSucceeds());
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int opt;
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EXPECT_THAT(
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setsockopt(fd.get(), SOL_SOCKET, SO_DETACH_FILTER, &opt, sizeof(opt)),
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SyscallSucceeds());
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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