Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 1 | // |
| 2 | // Copyright (C) 2015 The Android Open Source Project |
| 3 | // |
| 4 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | // you may not use this file except in compliance with the License. |
| 6 | // You may obtain a copy of the License at |
| 7 | // |
| 8 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | // |
| 10 | // Unless required by applicable law or agreed to in writing, software |
| 11 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | // See the License for the specific language governing permissions and |
| 14 | // limitations under the License. |
| 15 | // |
| 16 | |
| 17 | #include "dhcp_client/device_info.h" |
| 18 | |
| 19 | #include <net/if.h> |
| 20 | #include <netinet/in.h> |
| 21 | #include <sys/ioctl.h> |
| 22 | |
| 23 | #include <memory> |
| 24 | #include <string> |
| 25 | |
| 26 | #include <base/logging.h> |
Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 27 | |
Ningyuan Wang | 63aa9b5 | 2016-01-19 10:24:59 -0800 | [diff] [blame] | 28 | using shill::ByteString; |
Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 29 | using shill::Sockets; |
Ningyuan Wang | 88c688a | 2015-12-09 17:59:01 -0800 | [diff] [blame] | 30 | using shill::RTNLHandler; |
Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 31 | using std::unique_ptr; |
| 32 | |
| 33 | namespace { |
| 34 | |
| 35 | base::LazyInstance<dhcp_client::DeviceInfo> g_dhcp_device_info |
| 36 | = LAZY_INSTANCE_INITIALIZER; |
| 37 | |
| 38 | } // namespace |
| 39 | |
| 40 | namespace dhcp_client { |
| 41 | |
| 42 | DeviceInfo::DeviceInfo() |
Ningyuan Wang | 88c688a | 2015-12-09 17:59:01 -0800 | [diff] [blame] | 43 | : sockets_(new Sockets()), |
| 44 | rtnl_handler_(RTNLHandler::GetInstance()) { |
Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | DeviceInfo::~DeviceInfo() {} |
| 48 | |
| 49 | DeviceInfo* DeviceInfo::GetInstance() { |
| 50 | return g_dhcp_device_info.Pointer(); |
| 51 | } |
| 52 | |
| 53 | bool DeviceInfo::GetDeviceInfo(const std::string& interface_name, |
Ningyuan Wang | 63aa9b5 | 2016-01-19 10:24:59 -0800 | [diff] [blame] | 54 | ByteString* mac_address, |
Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 55 | unsigned int* interface_index ) { |
| 56 | struct ifreq ifr; |
| 57 | size_t if_name_len = interface_name.size(); |
| 58 | if (if_name_len > IFNAMSIZ) { |
| 59 | LOG(ERROR) << "Interface name is too long."; |
| 60 | return false; |
| 61 | } |
| 62 | memcpy(ifr.ifr_name, interface_name.c_str(), if_name_len); |
| 63 | ifr.ifr_name[if_name_len] = 0; |
| 64 | int fd = sockets_->Socket(AF_INET, SOCK_DGRAM, 0); |
| 65 | if (fd == -1) { |
| 66 | PLOG(ERROR) << "Failed to create socket."; |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | shill::ScopedSocketCloser socket_closer(sockets_.get(), fd); |
| 71 | // Get interface hardware address |
| 72 | if (sockets_->Ioctl(fd, SIOCGIFHWADDR, &ifr) == -1) { |
| 73 | PLOG(ERROR) << "Failed to get interface hardware address."; |
| 74 | return false; |
| 75 | } |
Ningyuan Wang | 88c688a | 2015-12-09 17:59:01 -0800 | [diff] [blame] | 76 | int if_index = rtnl_handler_->GetInterfaceIndex(interface_name); |
Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 77 | if (if_index == -1) { |
| 78 | LOG(ERROR) << "Unable to get interface index."; |
| 79 | return false; |
| 80 | } |
| 81 | *interface_index = if_index; |
Ningyuan Wang | 63aa9b5 | 2016-01-19 10:24:59 -0800 | [diff] [blame] | 82 | *mac_address = ByteString(ifr.ifr_hwaddr.sa_data, IFHWADDRLEN); |
Ningyuan Wang | bf21578 | 2015-12-04 09:55:39 -0800 | [diff] [blame] | 83 | |
| 84 | return true; |
| 85 | } |
| 86 | |
| 87 | } // namespace dhcp_client |
| 88 | |