2 * Copyright (C) 2016 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef WIFICOND_NET_NETLINK_UTILS_H_
18 #define WIFICOND_NET_NETLINK_UTILS_H_
23 #include <linux/nl80211.h>
25 #include <android-base/macros.h>
27 #include "wificond/net/netlink_manager.h"
32 struct InterfaceInfo {
33 InterfaceInfo() = default;
34 InterfaceInfo(uint32_t index_,
35 const std::string name_,
36 const std::vector<uint8_t> mac_address_)
39 mac_address(mac_address_) {}
40 // Index of this interface.
42 // Name of this interface.
44 // MAC address of this interface.
45 std::vector<uint8_t> mac_address;
50 BandInfo(std::vector<uint32_t>& band_2g_,
51 std::vector<uint32_t>& band_5g_,
52 std::vector<uint32_t>& band_dfs_)
55 band_dfs(band_dfs_) {}
56 // Frequencies for 2.4 GHz band.
57 std::vector<uint32_t> band_2g;
58 // Frequencies for 5 GHz band without DFS.
59 std::vector<uint32_t> band_5g;
60 // Frequencies for DFS.
61 std::vector<uint32_t> band_dfs;
64 struct ScanCapabilities {
65 ScanCapabilities() = default;
66 ScanCapabilities(uint8_t max_num_scan_ssids_,
67 uint8_t max_num_sched_scan_ssids_,
68 uint8_t max_match_sets_)
69 : max_num_scan_ssids(max_num_scan_ssids_),
70 max_num_sched_scan_ssids(max_num_sched_scan_ssids_),
71 max_match_sets(max_match_sets_) {}
72 // Number of SSIDs you can scan with a single scan request.
73 uint8_t max_num_scan_ssids;
74 // Number of SSIDs you can scan with a single scheduled scan request.
75 uint8_t max_num_sched_scan_ssids;
76 // Maximum number of sets that can be used with NL80211_ATTR_SCHED_SCAN_MATCH.
77 uint8_t max_match_sets;
80 struct WiphyFeatures {
82 : supports_random_mac_oneshot_scan(false),
83 supports_random_mac_sched_scan(false) {}
84 WiphyFeatures(uint32_t feature_flags)
85 : supports_random_mac_oneshot_scan(
86 feature_flags & NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR),
87 supports_random_mac_sched_scan(
88 feature_flags & NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR) {}
89 // This device/driver supports using a random MAC address during scan
90 // (while not associated).
91 bool supports_random_mac_oneshot_scan;
92 // This device/driver supports using a random MAC address for every
93 // scan iteration during scheduled scan (while not associated).
94 bool supports_random_mac_sched_scan;
95 // There are other flags included in NL80211_ATTR_FEATURE_FLAGS.
96 // We will add them once we find them useful.
100 StationInfo() = default;
101 StationInfo(uint32_t station_tx_packets_,
102 uint32_t station_tx_failed_,
103 uint32_t station_tx_bitrate_,
104 int8_t current_rssi_)
105 : station_tx_packets(station_tx_packets_),
106 station_tx_failed(station_tx_failed_),
107 station_tx_bitrate(station_tx_bitrate_),
108 current_rssi(current_rssi_) {}
109 // Number of successfully transmitted packets.
110 int32_t station_tx_packets;
111 // Number of tramsmission failures.
112 int32_t station_tx_failed;
113 // Transimission bit rate in 100kbit/s.
114 uint32_t station_tx_bitrate;
115 // Current signal strength.
117 // There are many other counters/parameters included in station info.
118 // We will add them once we find them useful.
121 class MlmeEventHandler;
122 class NetlinkManager;
125 // Provides NL80211 helper functions.
128 // Currently we only support setting the interface to STATION mode.
129 // This is used for cleaning up interface after KILLING hostapd.
134 explicit NetlinkUtils(NetlinkManager* netlink_manager);
135 virtual ~NetlinkUtils();
137 // Get the wiphy index from kernel.
138 // |*out_wiphy_index| returns the wiphy index from kernel.
139 // Returns true on success.
140 virtual bool GetWiphyIndex(uint32_t* out_wiphy_index);
142 // Get wifi interfaces info from kernel.
143 // |wiphy_index| is the wiphy index we get using GetWiphyIndex().
144 // |interface_info| returns a vector of InterfaceInfo structs with
145 // information about all existing interfaces.
146 // Returns true on success.
147 virtual bool GetInterfaces(uint32_t wiphy_index,
148 std::vector<InterfaceInfo>* interface_info);
150 // Set the mode of interface.
151 // |interface_index| is the interface index.
152 // |mode| is one of the values in |enum InterfaceMode|.
153 // Returns true on success.
154 virtual bool SetInterfaceMode(uint32_t interface_index,
157 // Get wiphy capability information from kernel.
158 // Returns true on success.
159 virtual bool GetWiphyInfo(uint32_t wiphy_index,
160 BandInfo* out_band_info,
161 ScanCapabilities* out_scan_capabilities,
162 WiphyFeatures* out_wiphy_features);
164 // Get station info from kernel.
165 // |*out_station_info]| is the struct of available station information.
166 // Returns true on success.
167 virtual bool GetStationInfo(uint32_t interface_index,
168 const std::vector<uint8_t>& mac_address,
169 StationInfo* out_station_info);
171 // Sign up to be notified when there is MLME event.
172 // Only one handler can be registered per interface index.
173 // New handler will replace the registered handler if they are for the
174 // same interface index.
175 // NetlinkUtils is not going to take ownership of this pointer, and that it
176 // is the caller's responsibility to make sure that the object exists for the
177 // duration of the subscription.
178 virtual void SubscribeMlmeEvent(uint32_t interface_index,
179 MlmeEventHandler* handler);
181 // Cancel the sign-up of receiving MLME event notification
182 // from interface with index |interface_index|.
183 virtual void UnsubscribeMlmeEvent(uint32_t interface_index);
185 // Sign up to be notified when there is an regulatory domain change.
186 // Only one handler can be registered per wiphy index.
187 // New handler will replace the registered handler if they are for the
189 virtual void SubscribeRegDomainChange(uint32_t wiphy_index,
190 OnRegDomainChangedHandler handler);
192 // Cancel the sign-up of receiving regulatory domain change notification
193 // from wiphy with index |wiphy_index|.
194 virtual void UnsubscribeRegDomainChange(uint32_t wiphy_index);
197 bool ParseBandInfo(const NL80211Packet* const packet,
198 BandInfo* out_band_info);
199 bool ParseScanCapabilities(const NL80211Packet* const packet,
200 ScanCapabilities* out_scan_capabilities);
201 NetlinkManager* netlink_manager_;
203 DISALLOW_COPY_AND_ASSIGN(NetlinkUtils);
206 } // namespace wificond
207 } // namespace android
209 #endif // WIFICOND_NET_NETLINK_UTILS_H_