tcpdump移植

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本文介绍嵌入式网络编程常用工具tcpdump的移植和使用方法：

下载源码：

http://www.tcpdump.org/

交叉编译：

1. 先编译libpcap-1.7.4：

./configure --prefix=/home/liaojunjun/test/libpcap-1.7.4/install --host=arm-linux --target=arm-linux CC=/home/liaojunjun/ambalink_sdk_3_10_20160503/output.oem/a9s_ambalink/host/usr/bin/arm-linux-gnueabihf-gcc

错误：configure: error: pcap type not determined when cross-compiling; use --with-pcap=...

解决：注释以下代码

#if test -z "$with_pcap" && test "$cross_compiling" = yes; then
# as_fn_error $? "pcap type not determined when cross-compiling; use --with-pcap=..." "$LINENO" 5
#fi

mkdir install

make

make install

2. 再编译tcpdump-4.7.4

./configure --prefix=/home/liaojunjun/test/tcpdump-4.7.4/install --host=arm-linux --target=arm-linux CC=/home/liaojunjun/ambalink_sdk_3_10_20160503/output.oem/a9s_ambalink/host/usr/bin/arm-linux-gnueabihf-gcc

make

make install

3. 把生成的tcpdump文件在设备上执行（install/sbin/）

./tcpdump port 8553 -w port8553.cap

抓包生成文件port8553.cap

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