wifi/wifi_hal/link_layer_stats.cpp

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Portions copyright (C) 2017 Broadcom Limited
 *
 * 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 <stdint.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <linux/rtnetlink.h>
#include <netpacket/packet.h>
#include <linux/filter.h>
#include <linux/errqueue.h>

#include <linux/pkt_sched.h>
#include <netlink/object-api.h>
#include <netlink/netlink.h>
#include <netlink/socket.h>
#include <netlink/handlers.h>

#include "sync.h"

#define LOG_TAG  "WifiHAL"

#include <log/log.h>

#include "wifi_hal.h"
#include "common.h"
#include "cpp_bindings.h"

enum {
    LSTATS_SUBCMD_GET_INFO = ANDROID_NL80211_SUBCMD_LSTATS_RANGE_START,
};

class GetLinkStatsCommand : public WifiCommand
{
    wifi_stats_result_handler mHandler;
public:
    GetLinkStatsCommand(wifi_interface_handle iface, wifi_stats_result_handler handler)
        : WifiCommand("GetLinkStatsCommand", iface, 0), mHandler(handler)
    { }

    virtual int create() {
        // ALOGI("Creating message to get link statistics; iface = %d", mIfaceInfo->id);

        int ret = mMsg.create(GOOGLE_OUI, LSTATS_SUBCMD_GET_INFO);
        if (ret < 0) {
            ALOGE("Failed to create %x - %d", LSTATS_SUBCMD_GET_INFO, ret);
            return ret;
        }

        return ret;
    }

protected:
    virtual int handleResponse(WifiEvent& reply) {

        // ALOGI("In GetLinkStatsCommand::handleResponse");

        if (reply.get_cmd() != NL80211_CMD_VENDOR) {
            ALOGD("Ignoring reply with cmd = %d", reply.get_cmd());
            return NL_SKIP;
        }

        int id = reply.get_vendor_id();
        int subcmd = reply.get_vendor_subcmd();

        // ALOGI("Id = %0x, subcmd = %d", id, subcmd);

        void *data = reply.get_vendor_data();
        int len = reply.get_vendor_data_len();
        wifi_radio_stat *radio_stat = (wifi_radio_stat *)data;
        if (!radio_stat) {
            ALOGE("Invalid stats pointer received");
            return NL_SKIP;
        }
	radio_stat->tx_time_per_levels = (u32*)((char*)data + sizeof(wifi_radio_stat) + sizeof(wifi_iface_stat));
        if (radio_stat->num_channels > 11) {
            ALOGE("Incorrect number of channels = %d", radio_stat->num_channels);
            // dump data before num_channels
            ALOGE("radio: = %d", radio_stat->radio);
            ALOGE("on_time: = %d", radio_stat->on_time);
            ALOGE("tx_time: = %d", radio_stat->tx_time);
            ALOGE("rx_time: = %d", radio_stat->rx_time);
            ALOGE("on_time_scan: = %d", radio_stat->on_time_scan);
            ALOGE("on_time_nbd: = %d", radio_stat->on_time_nbd);
            ALOGE("on_time_gscan: = %d", radio_stat->on_time_gscan);
            ALOGE("on_time_pno_scan: = %d", radio_stat->on_time_pno_scan);
            ALOGE("on_time_hs20: = %d", radio_stat->on_time_hs20);
            return NL_SKIP;
        }
        wifi_iface_stat *iface_stat = (wifi_iface_stat *)((char* )data + sizeof(wifi_radio_stat));

	if(*mHandler.on_link_stats_results == NULL) {
		ALOGE("*mHandler.on_link_stats_results is NULL");
	} else {
        	(*mHandler.on_link_stats_results)(id, iface_stat, 1, radio_stat);
	}
        return NL_OK;
    }

};

wifi_error wifi_get_link_stats(wifi_request_id id,
        wifi_interface_handle iface, wifi_stats_result_handler handler)
{
    GetLinkStatsCommand command(iface, handler);
    return (wifi_error) command.requestResponse();
}

wifi_error wifi_set_link_stats(
        wifi_interface_handle /* iface */, wifi_link_layer_params /* params */)
{
    /* Return success here since bcom HAL does not need set link stats. */
    return WIFI_SUCCESS;
}

wifi_error wifi_clear_link_stats(
        wifi_interface_handle /* iface */, u32 /* stats_clear_req_mask */,
        u32 * /* stats_clear_rsp_mask */, u8 /* stop_req */, u8 * /* stop_rsp */)
{
    /* Return success here since bcom HAL does not support clear link stats. */
    return WIFI_SUCCESS;
}