1 /*
2 * Copyright (C) 2021 The Android Open Source Project
3 *
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #include <map>
19
20 #include <net/if.h>
21
22 #include "dirent.h"
23 #include "netdutils/Status.h"
24 #include "netdutils/Utils.h"
25
26 namespace android {
27 namespace netdutils {
28
getIfaceNames()29 StatusOr<std::vector<std::string>> getIfaceNames() {
30 std::vector<std::string> ifaceNames;
31 DIR* d;
32 struct dirent* de;
33
34 if (!(d = opendir("/sys/class/net"))) {
35 return statusFromErrno(errno, "Cannot open iface directory");
36 }
37 while ((de = readdir(d))) {
38 if ((de->d_type != DT_DIR) && (de->d_type != DT_LNK)) continue;
39 if (de->d_name[0] == '.') continue;
40 ifaceNames.push_back(std::string(de->d_name));
41 }
42 closedir(d);
43 return ifaceNames;
44 }
45
getIfaceList()46 StatusOr<std::map<std::string, uint32_t>> getIfaceList() {
47 std::map<std::string, uint32_t> ifacePairs;
48
49 ASSIGN_OR_RETURN(auto ifaceNames, getIfaceNames());
50
51 for (const auto& name : ifaceNames) {
52 uint32_t ifaceIndex = if_nametoindex(name.c_str());
53 if (ifaceIndex) {
54 ifacePairs.insert(std::pair<std::string, uint32_t>(name, ifaceIndex));
55 }
56 }
57 return ifacePairs;
58 }
59
60 } // namespace netdutils
61 } // namespace android
62