1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Portions copyright (C) 2017 Broadcom Limited
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 #include <stdint.h>
20 #include <fcntl.h>
21 #include <sys/socket.h>
22 #include <netlink/genl/genl.h>
23 #include <netlink/genl/family.h>
24 #include <netlink/genl/ctrl.h>
25 #include <linux/rtnetlink.h>
26 #include <netpacket/packet.h>
27 #include <linux/filter.h>
28 #include <linux/errqueue.h>
29
30 #include <linux/pkt_sched.h>
31 #include <netlink/object-api.h>
32 #include <netlink/netlink.h>
33 #include <netlink/socket.h>
34 #include <netlink/handlers.h>
35
36 #include "sync.h"
37
38 #define LOG_TAG "WifiHAL"
39
40 #include <utils/Log.h>
41
42 #include "wifi_hal.h"
43 #include "common.h"
44 #include "cpp_bindings.h"
45
46 typedef enum {
47 ANDR_WIFI_ATTRIBUTE_INVALID = 0,
48 ANDR_WIFI_ATTRIBUTE_NUM_RADIO = 1,
49 ANDR_WIFI_ATTRIBUTE_STATS_INFO = 2,
50 ANDR_WIFI_ATTRIBUTE_STATS_MAX = 3
51 } LINK_STAT_ATTRIBUTE;
52
53 /* Internal radio statistics structure in the driver */
54 typedef struct {
55 wifi_radio radio;
56 uint32_t on_time;
57 uint32_t tx_time;
58 uint32_t rx_time;
59 uint32_t on_time_scan;
60 uint32_t on_time_nbd;
61 uint32_t on_time_gscan;
62 uint32_t on_time_roam_scan;
63 uint32_t on_time_pno_scan;
64 uint32_t on_time_hs20;
65 uint32_t num_channels;
66 wifi_channel_stat channels[];
67 } wifi_radio_stat_internal;
68
69 enum {
70 LSTATS_SUBCMD_GET_INFO = ANDROID_NL80211_SUBCMD_LSTATS_RANGE_START,
71 };
72
73 class GetLinkStatsCommand : public WifiCommand
74 {
75 wifi_stats_result_handler mHandler;
76 public:
GetLinkStatsCommand(wifi_interface_handle iface,wifi_stats_result_handler handler)77 GetLinkStatsCommand(wifi_interface_handle iface, wifi_stats_result_handler handler)
78 : WifiCommand("GetLinkStatsCommand", iface, 0), mHandler(handler)
79 { }
80
create()81 virtual int create() {
82 ALOGI("Creating message to get link statistics; iface = %d", mIfaceInfo->id);
83
84 int ret = mMsg.create(GOOGLE_OUI, LSTATS_SUBCMD_GET_INFO);
85 if (ret < 0) {
86 ALOGE("Failed to create %x - %d", LSTATS_SUBCMD_GET_INFO, ret);
87 return ret;
88 }
89
90 return ret;
91 }
92
93 protected:
handleResponse(WifiEvent & reply)94 virtual int handleResponse(WifiEvent& reply) {
95 void *data = NULL;
96 wifi_radio_stat *radio_stat_ptr = NULL;
97 u8 *iface_stat = NULL;
98 u8 *radioStatsBuf = NULL, *output = NULL, *data_ptr = NULL;
99 uint32_t total_size = 0, per_radio_size = 0, data_len = 0, rem_len = 0;
100 int num_radios = 0, id = 0, subcmd = 0, len = 0;
101
102 ALOGI("In GetLinkStatsCommand::handleResponse");
103
104 if (reply.get_cmd() != NL80211_CMD_VENDOR) {
105 ALOGD("Ignoring reply with cmd = %d", reply.get_cmd());
106 return NL_SKIP;
107 }
108
109 id = reply.get_vendor_id();
110 subcmd = reply.get_vendor_subcmd();
111 nlattr *vendor_data = reply.get_attribute(NL80211_ATTR_VENDOR_DATA);
112 len = reply.get_vendor_data_len();
113
114 ALOGV("Id = %0x, subcmd = %d, len = %d\n", id, subcmd, len);
115 if (vendor_data == NULL || len == 0) {
116 ALOGE("no vendor data in GetLinkStatCommand response; ignoring it");
117 return NL_SKIP;
118 }
119
120 for (nl_iterator it(vendor_data); it.has_next(); it.next()) {
121 if (it.get_type() == ANDR_WIFI_ATTRIBUTE_NUM_RADIO) {
122 num_radios = it.get_u32();
123 } else if (it.get_type() == ANDR_WIFI_ATTRIBUTE_STATS_INFO) {
124 data = it.get_data();
125 data_len = it.get_len();
126 } else {
127 ALOGW("Ignoring invalid attribute type = %d, size = %d\n",
128 it.get_type(), it.get_len());
129 return NL_SKIP;
130 }
131 }
132
133 if (num_radios) {
134 rem_len = MAX_CMD_RESP_BUF_LEN;
135 radioStatsBuf = (u8 *)malloc(MAX_CMD_RESP_BUF_LEN);
136 if (!radioStatsBuf) {
137 ALOGE("No memory\n");
138 return NL_SKIP;
139 }
140 memset(radioStatsBuf, 0, MAX_CMD_RESP_BUF_LEN);
141 output = radioStatsBuf;
142
143 if (!data || !data_len) {
144 ALOGE("%s: null data\n", __func__);
145 return NL_SKIP;
146 }
147
148 data_ptr = (u8*)data;
149 for (int i = 0; i < num_radios; i++) {
150 rem_len -= per_radio_size;
151 if (rem_len < per_radio_size) {
152 ALOGE("No data left for radio %d\n", i);
153 goto exit;
154 }
155 data_ptr = (u8*)data + total_size;
156 if (!data_ptr) {
157 ALOGE("Invalid data for radio index = %d\n", i);
158 goto exit;
159 }
160 radio_stat_ptr =
161 convertToExternalRadioStatStructure((wifi_radio_stat*)data_ptr,
162 &per_radio_size);
163 if (!radio_stat_ptr || !per_radio_size) {
164 ALOGE("No data for radio %d\n", i);
165 continue;
166 }
167 memcpy(output, radio_stat_ptr, per_radio_size);
168 output += per_radio_size;
169 total_size += per_radio_size;
170 }
171
172 iface_stat = ((u8*)data + total_size);
173 if (!iface_stat || data_len < total_size) {
174 ALOGE("No data for iface stats!!, data_len = %d, total_size = %d\n",
175 data_len, total_size);
176 goto exit;
177 }
178 (*mHandler.on_link_stats_results)(id, (wifi_iface_stat *)iface_stat,
179 num_radios, (wifi_radio_stat *)radioStatsBuf);
180 }
181 exit:
182 if (radio_stat_ptr) {
183 free(radio_stat_ptr);
184 radio_stat_ptr = NULL;
185 }
186 if (radioStatsBuf) {
187 free(radioStatsBuf);
188 radioStatsBuf = NULL;
189 }
190 return NL_OK;
191 }
192
193 private:
convertToExternalRadioStatStructure(wifi_radio_stat * internal_stat_ptr,uint32_t * per_radio_size)194 wifi_radio_stat *convertToExternalRadioStatStructure(wifi_radio_stat *internal_stat_ptr,
195 uint32_t *per_radio_size) {
196 wifi_radio_stat *external_stat_ptr = NULL;
197 if (!internal_stat_ptr) {
198 ALOGE("Incoming data is null\n");
199 } else {
200 uint32_t channel_size = internal_stat_ptr->num_channels * sizeof(wifi_channel_stat);
201 *per_radio_size = offsetof(wifi_radio_stat, channels) + channel_size;
202 external_stat_ptr = (wifi_radio_stat *)malloc(*per_radio_size);
203 if (external_stat_ptr) {
204 external_stat_ptr->radio = internal_stat_ptr->radio;
205 external_stat_ptr->on_time = internal_stat_ptr->on_time;
206 external_stat_ptr->tx_time = internal_stat_ptr->tx_time;
207 external_stat_ptr->num_tx_levels = internal_stat_ptr->num_tx_levels;
208 external_stat_ptr->tx_time_per_levels = NULL;
209 external_stat_ptr->rx_time = internal_stat_ptr->rx_time;
210 external_stat_ptr->on_time_scan = internal_stat_ptr->on_time_scan;
211 external_stat_ptr->on_time_nbd = internal_stat_ptr->on_time_nbd;
212 external_stat_ptr->on_time_gscan = internal_stat_ptr->on_time_gscan;
213 external_stat_ptr->on_time_roam_scan = internal_stat_ptr->on_time_roam_scan;
214 external_stat_ptr->on_time_pno_scan = internal_stat_ptr->on_time_pno_scan;
215 external_stat_ptr->on_time_hs20 = internal_stat_ptr->on_time_hs20;
216 external_stat_ptr->num_channels = internal_stat_ptr->num_channels;
217 if (internal_stat_ptr->num_channels) {
218 memcpy(&(external_stat_ptr->channels), &(internal_stat_ptr->channels),
219 channel_size);
220 }
221 }
222 }
223 return external_stat_ptr;
224 }
225 };
226
wifi_get_link_stats(wifi_request_id id,wifi_interface_handle iface,wifi_stats_result_handler handler)227 wifi_error wifi_get_link_stats(wifi_request_id id,
228 wifi_interface_handle iface, wifi_stats_result_handler handler)
229 {
230 GetLinkStatsCommand command(iface, handler);
231 return (wifi_error) command.requestResponse();
232 }
233
wifi_set_link_stats(wifi_interface_handle,wifi_link_layer_params)234 wifi_error wifi_set_link_stats(
235 wifi_interface_handle /* iface */, wifi_link_layer_params /* params */)
236 {
237 /* Return success here since bcom HAL does not need set link stats. */
238 return WIFI_SUCCESS;
239 }
240
wifi_clear_link_stats(wifi_interface_handle,u32,u32 *,u8,u8 *)241 wifi_error wifi_clear_link_stats(
242 wifi_interface_handle /* iface */, u32 /* stats_clear_req_mask */,
243 u32 * /* stats_clear_rsp_mask */, u8 /* stop_req */, u8 * /* stop_rsp */)
244 {
245 /* Return success here since bcom HAL does not support clear link stats. */
246 return WIFI_SUCCESS;
247 }
248