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//
// Copyright (C) 2015 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 "dhcp_client/device_info.h"
#include <net/if.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <memory>
#include <string>
#include <base/logging.h>
using shill::ByteString;
using shill::Sockets;
using shill::RTNLHandler;
using std::unique_ptr;
namespace {
base::LazyInstance<dhcp_client::DeviceInfo> g_dhcp_device_info
= LAZY_INSTANCE_INITIALIZER;
} // namespace
namespace dhcp_client {
DeviceInfo::DeviceInfo()
: sockets_(new Sockets()),
rtnl_handler_(RTNLHandler::GetInstance()) {
}
DeviceInfo::~DeviceInfo() {}
DeviceInfo* DeviceInfo::GetInstance() {
return g_dhcp_device_info.Pointer();
}
bool DeviceInfo::GetDeviceInfo(const std::string& interface_name,
ByteString* mac_address,
unsigned int* interface_index ) {
struct ifreq ifr;
size_t if_name_len = interface_name.size();
if (if_name_len > IFNAMSIZ) {
LOG(ERROR) << "Interface name is too long.";
return false;
}
memcpy(ifr.ifr_name, interface_name.c_str(), if_name_len);
ifr.ifr_name[if_name_len] = 0;
int fd = sockets_->Socket(AF_INET, SOCK_DGRAM, 0);
if (fd == -1) {
PLOG(ERROR) << "Failed to create socket.";
return false;
}
shill::ScopedSocketCloser socket_closer(sockets_.get(), fd);
// Get interface hardware address
if (sockets_->Ioctl(fd, SIOCGIFHWADDR, &ifr) == -1) {
PLOG(ERROR) << "Failed to get interface hardware address.";
return false;
}
int if_index = rtnl_handler_->GetInterfaceIndex(interface_name);
if (if_index == -1) {
LOG(ERROR) << "Unable to get interface index.";
return false;
}
*interface_index = if_index;
*mac_address = ByteString(ifr.ifr_hwaddr.sa_data, IFHWADDRLEN);
return true;
}
} // namespace dhcp_client