53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
// Copyright 2020 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 <net/if.h>
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#include <sched.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include "gmock/gmock.h"
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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/capability_util.h"
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#include "test/util/posix_error.h"
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#include "test/util/test_util.h"
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#include "test/util/thread_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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TEST(NetworkNamespaceTest, LoopbackExists) {
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SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_NET_ADMIN)));
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ScopedThread t([&] {
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ASSERT_THAT(unshare(CLONE_NEWNET), SyscallSucceedsWithValue(0));
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// TODO(gvisor.dev/issue/1833): Update this to test that only "lo" exists.
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// Check loopback device exists.
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int sock = socket(AF_INET, SOCK_DGRAM, 0);
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ASSERT_THAT(sock, SyscallSucceeds());
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struct ifreq ifr;
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strncpy(ifr.ifr_name, "lo", IFNAMSIZ);
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EXPECT_THAT(ioctl(sock, SIOCGIFINDEX, &ifr), SyscallSucceeds())
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<< "lo cannot be found";
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});
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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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