【转】linux下安装libpcap
1.安装GCC:
yum -y install gcc-c++
2.安装flex:
yum -y install flex
没有flex,直接安装libpcap会提示"Your operating system's lex is insufficient to compile libpcap"错误;
3.安装bison
yum -y install bison
前面安装的是flex,就需要搭配bison,如不会提示"don't have both flex and bison;reverting to lex/yacc"错误;
4.安装 libpcap
下载地址:http://www.tcpdump.org/
下载版本:libpcap-1.2.1.tar.gz
命令如下:
./configure
make
make install
5.简单的例子测试一下libpcap:
//device.c
#include <stdio.h>
#include <pcap.h>
int main(int argc,char *argv[]){
char *dev, errbuf[PCAP_ERRBUF_SIZE];
dev=pcap_lookupdev(errbuf);
if(dev==NULL){
fprintf(stderr,"couldn't find default device: %s\n",errbuf);
return(2);
}
printf("Device: %s\n",dev);
return(0);
}
编译指令:gcc -o device device.c -lpcap
备注:编译时要使用libpcap的参数-lpcap,否则会提示“pcap_lookupdev 未定义的引用”的错误;
运行指令:./device
有时系统会提示出错:error
while
loading shared libraries: libpcap.so.1: cannot open shared object file: No such file or directory。可到/usr/lib下找到libpcap.so.1.x.x文件,复制一个备份,重命名为libpcap.so.1,将libpcap.so.1后拷贝文件到/usr/lib目录下,就可以了。