96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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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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*/
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#include <iostream>
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#include <string>
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#include <fcntl.h>
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#include <android-base/stringprintf.h>
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#include <android-base/unique_fd.h>
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#include <gtest/gtest.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <linux/if_tun.h>
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using std::cout;
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using std::endl;
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using std::string;
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using android::base::StringPrintf;
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using android::base::unique_fd;
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static const short kTunModes[] = {
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IFF_TUN,
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IFF_TAP,
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};
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class VtsKernelTunTest : public ::testing::TestWithParam<short> {
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public:
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virtual void SetUp() override {
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tun_device_ = "/dev/tun";
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uint32_t num = arc4random_uniform(1000);
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ifr_name_ = StringPrintf("tun%d", num);
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}
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// Used to initialize tun device.
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int TunInit(short flags);
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string tun_device_;
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string ifr_name_;
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unique_fd fd_;
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};
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int VtsKernelTunTest::TunInit(short mode) {
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struct ifreq ifr = {
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.ifr_flags = mode,
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};
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strncpy(ifr.ifr_name, ifr_name_.c_str(), IFNAMSIZ);
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int fd = open(tun_device_.c_str(), O_RDWR | O_NONBLOCK);
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if (fd < 0) {
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return -1;
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}
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if (ioctl(fd, TUNSETIFF, (void *) &ifr) < 0) {
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close(fd);
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return -1;
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}
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return fd;
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}
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// Test opening and closing of a tun interface.
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TEST_P(VtsKernelTunTest, OpenAndClose) {
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fd_ = unique_fd(TunInit(GetParam()));
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ASSERT_TRUE(fd_ >= 0);
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}
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// Test basic read functionality of a tuen interface.
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TEST_P(VtsKernelTunTest, BasicRead) {
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fd_ = unique_fd(TunInit(GetParam()));
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ASSERT_TRUE(fd_ >= 0);
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uint8_t test_output;
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// Expect no packets available on this interface.
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ASSERT_TRUE(read(fd_, &test_output, 1) < 0);
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}
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INSTANTIATE_TEST_CASE_P(Basic, VtsKernelTunTest,
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::testing::ValuesIn(kTunModes));
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int main(int argc, char **argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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