60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
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// Copyright 2018 Google LLC
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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 "gtest/gtest.h"
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#include "gtest/gtest.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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namespace gvisor {
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namespace testing {
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namespace {
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TEST(ProcNetIfInet6, Format) {
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auto ifinet6 = ASSERT_NO_ERRNO_AND_VALUE(GetContents("/proc/net/if_inet6"));
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EXPECT_THAT(ifinet6,
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::testing::MatchesRegex(
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// Ex: "00000000000000000000000000000001 01 80 10 80 lo\n"
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"^([a-f\\d]{32}( [a-f\\d]{2}){4} +[a-z][a-z\\d]*\\n)+$"));
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}
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TEST(ProcSysNetIpv4Sack, Exists) {
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EXPECT_THAT(open("/proc/sys/net/ipv4/tcp_sack", O_RDONLY), SyscallSucceeds());
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}
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TEST(ProcSysNetIpv4Sack, CanReadAndWrite) {
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auto const fd =
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ASSERT_NO_ERRNO_AND_VALUE(Open("/proc/sys/net/ipv4/tcp_sack", O_RDWR));
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char buf;
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EXPECT_THAT(PreadFd(fd.get(), &buf, sizeof(buf), 0),
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SyscallSucceedsWithValue(sizeof(buf)));
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EXPECT_TRUE(buf == '0' || buf == '1') << "unexpected tcp_sack: " << buf;
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char to_write = (buf == '1') ? '0' : '1';
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EXPECT_THAT(PwriteFd(fd.get(), &to_write, sizeof(to_write), 0),
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SyscallSucceedsWithValue(sizeof(to_write)));
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buf = 0;
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EXPECT_THAT(PreadFd(fd.get(), &buf, sizeof(buf), 0),
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SyscallSucceedsWithValue(sizeof(buf)));
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EXPECT_EQ(buf, to_write);
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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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