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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 "test/syscalls/linux/socket_bind_to_device_util.h"
#include <arpa/inet.h>
#include <fcntl.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 <unistd.h>
#include <cstdio>
#include <cstring>
#include <map>
#include <memory>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
using std::string;
PosixErrorOr<std::unique_ptr<Tunnel>> Tunnel::New(string tunnel_name) {
int fd;
RETURN_ERROR_IF_SYSCALL_FAIL(fd = open("/dev/net/tun", O_RDWR));
// Using `new` to access a non-public constructor.
auto new_tunnel = absl::WrapUnique(new Tunnel(fd));
ifreq ifr = {};
ifr.ifr_flags = IFF_TUN;
strncpy(ifr.ifr_name, tunnel_name.c_str(), sizeof(ifr.ifr_name));
RETURN_ERROR_IF_SYSCALL_FAIL(ioctl(fd, TUNSETIFF, &ifr));
new_tunnel->name_ = ifr.ifr_name;
return new_tunnel;
}
std::unordered_set<string> GetInterfaceNames() {
struct if_nameindex* interfaces = if_nameindex();
std::unordered_set<string> names;
if (interfaces == nullptr) {
return names;
}
for (auto interface = interfaces;
interface->if_index != 0 || interface->if_name != nullptr; interface++) {
names.insert(interface->if_name);
}
if_freenameindex(interfaces);
return names;
}
} // namespace testing
} // namespace gvisor
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