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