bcmdhd/wifi_hal/link_layer_stats.cpp

#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 <utils/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(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();
	int num_chan = ((wifi_radio_stat *)data)->num_channels;
        if (num_chan > 32) {
           ALOGE("Incorrect number of channels = %d", num_chan);
           return NL_SKIP;
        }
	(*mHandler.on_link_stats_results)(id,
		(wifi_iface_stat *)((char *)&((wifi_radio_stat *)data)->channels
		+ num_chan*sizeof(wifi_channel_stat)),
		1, (wifi_radio_stat *)data);

        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();
}