[NETD-TC#7] Move getIfaceNames() and getIfaceList() to libnetdutils.
getIfaceNames() and getIfaceList() are used by Netd.
Test: m; flash; boot
Change-Id: Id95e2e7e83c07b2f420880feebdf12d4c477c958
diff --git a/staticlibs/netd/libnetdutils/Utils.cpp b/staticlibs/netd/libnetdutils/Utils.cpp
new file mode 100644
index 0000000..16ec882
--- /dev/null
+++ b/staticlibs/netd/libnetdutils/Utils.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ *
+ * 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 <map>
+
+#include <net/if.h>
+
+#include "dirent.h"
+#include "netdutils/Status.h"
+#include "netdutils/Utils.h"
+
+namespace android {
+namespace netdutils {
+
+StatusOr<std::vector<std::string>> getIfaceNames() {
+ std::vector<std::string> ifaceNames;
+ DIR* d;
+ struct dirent* de;
+
+ if (!(d = opendir("/sys/class/net"))) {
+ return statusFromErrno(errno, "Cannot open iface directory");
+ }
+ while ((de = readdir(d))) {
+ if ((de->d_type != DT_DIR) && (de->d_type != DT_LNK)) continue;
+ if (de->d_name[0] == '.') continue;
+ ifaceNames.push_back(std::string(de->d_name));
+ }
+ closedir(d);
+ return ifaceNames;
+}
+
+StatusOr<std::map<std::string, uint32_t>> getIfaceList() {
+ std::map<std::string, uint32_t> ifacePairs;
+
+ ASSIGN_OR_RETURN(auto ifaceNames, getIfaceNames());
+
+ for (const auto& name : ifaceNames) {
+ uint32_t ifaceIndex = if_nametoindex(name.c_str());
+ if (ifaceIndex) {
+ ifacePairs.insert(std::pair<std::string, uint32_t>(name, ifaceIndex));
+ }
+ }
+ return ifacePairs;
+}
+
+} // namespace netdutils
+} // namespace android