OHOS SDK准备

1. 从 openHarmony SDK 官方发布渠道 下载SDK （如：http://download.ci.openharmony.cn/version/Master_Version/OpenHarmony_4.0.10.3/20230817_130047/version-Master_Version-OpenHarmony_4.0.10.3-20230817_130047-ohos-sdk-full.tar.gz）

2. 解压openHarmony SDK

   tar -xvf version-Master_Version-OpenHarmony_4.0.10.3-20230817_130047-ohos-sdk-full.tar.gz
   

3. 进入到sdk的linux目录，解压工具包

   cd ohos_sdk/linux
   for i in *.zip;do unzip ${i};done
   

tcpdump源码准备

1. 下载tcpdump、libpcap源码：

   下载地址：Home | TCPDUMP & LIBPCAP

2. 解压源码包

   tar -zxvf libpcap-1.10.4.tar.xz
   tar -zxvf tcpdump-4.99.4.tar.xz
   

编译 & 安装

1. 添加交叉编译工具链环境变量,在命令行输入以下命令：

   export OHOS_SDK=/home/chos/codes/openharmony_sdk/ohos-sdk/linux      ## 配置SDK路径，此处需配置成自己的sdk解压目录
   export CC="${OHOS_SDK}/native/llvm/bin/clang --target=aarch64-linux-ohos"
   export CXX="${OHOS_SDK}/native/llvm/bin/clang++ --target=aarch64-linux-ohos"
   export LD=${OHOS_SDK}/native/llvm/bin/ld.lld
   export CFLAGS="-fPIC -D__MUSL__=1"
   

2. 编译libpcap-1.10.4

   进入libpcap源码目录，创建build目录

   cd libpcap-1.10.4
   mkdir build
   cd build
   ../configure --host=aarch64-linux --prefix=$PWD/install
   

   编译安装
   make & make install

3. 编译tcpdump-4.99.4

   进入tcpdump源码目录，创建build目录

   cd tcpdump-4.99.4
   mkdir build
   cd build
   ln -s ../../libpcap-1.10.4/build/install libpcap
   ../configure --host=aarch64-linux --prefix=$PWD/install CFLAGS="-fPIC -D__MUSL__=1 -I./libpcap/include -L./libpcap/lib"
   make
   

4. 推送需要的so、bin文件到系统中运行验证