Nexus 5 phone uses Nexmon tool to get CSI information

一、实验工具

１. Google Nexus５智能手机（系统：Android 6.0.1,固件：M4B30Z,权限：ROOT ,可参考Nexus 5刷机（Android 6.0.1,M4B30Z 固件）和ROOT教程）;
2. 安装Xubuntu 18.04The computer or virtual machine of the system：Xubuntu 下载地址,You can download the corresponding version according to your needs;Xubuntu 使用教程;Students who use virtual machines can refer to this tutorial,VMware安装Ubuntu18.04教程;
3. ASUS-AC86U路由器.

二、操作步骤

注意：The steps here are only correct Nexus５智能手机和Xubuntu 18.04系统有效.

1. 进入Xubuntu系统,打开终端,获取超级用户权限,进入根目录下,执行如下命令安装dependencies;

apt-get install git gawk qpdf adb flex bison

2. 如果是64位操作系统,还需要安装i386库,若不是,可忽略此步骤;

sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386

3. 获取nexmon项目;

git clone git://github.com/seemoo-lab/nexmon.git

4. 下载安装Android NDK r11c（Only this version is supported）,并配置环境变量,参考教程;
5. 进入nexmon文件夹,Execute the following command to automatically configure environment variables;

source setup_env.sh

6. 完成后执行 make 命令,并进入utilities文件夹,继续执行 make 命令;
7. Pass the prepared mobile phone with the computerUSB进行连接,并执行如下命令;

make install

8. 进入pathes/bcm4339/6_37_34_43/路径下,获取nexmon_csi项目;

git clone https://github.com/seemoo-lab/nexmon_csi.git

9. 进入nexmon_csi路径,执行如下命令,Install the patch for the phone;

make install-firmware

10. 进入utils/makecsiparams/路径,执行 make Commands are used to configure the extractor;
11. 调用makecsiparamsExecute the following command to generate a parameter string,以备后面使用,

# 其中,157指信道,80指带宽,00:11:22:33:44:55指路由器MAC地址
makecsiparams -c 157/80 -C 1 -N 1 -m 00:11:22:33:44:55 -b 0x88

执行后,Generate the following parameters：m+IBEQGIAgAAESIzRFWqu6q7qrsAAAAAAAAAAAAAAAAAAA==;
12. Run the following command to turn on the wireless network card of the mobile phone,This command does not need to be executed if the network card is turned on;

ifconfig wlan0 up

13. 执行如下命令配置CSI提取器,vThe following parameters are steps11生成的参数;

nexutil -Iwlan0 -s500 -b -l34 -vm+IBEQGIAgAAESIzRFWqu6q7qrsAAAAAAAAAAAAAAAAAAA==

14. 执行如下命令,开启监控模式;

nexutil -Iwlan0 -m1

15. 执行如下命令,获取CSI信息并存储.

tcpdump -i wlan0 -vv dst port 5500 -w /sdcard/csi.pcap

16. 下载utils/matlab,编译unpack_float.c为unpack_float.mexw64文件,使用 Matlab软件执行utils/matlab/csireader.m文件,观察图像.

三、结果展示

参考：nexmon项目教程

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