Linux下libpcap的安装

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1，环境： Ubuntu16.0 + libpcap-1.4.0.tar.gz

2，Libpcap下载：官方地址-http://www.tcpdump.org/#latest-release 即可下载最新版本的libpcap。

3，解压libpcap-1.4.0.tar.gz： tar -zxvf libpcap-1.4.0.tar.gz

4，配置生成makefile文件：cd到libpcap解压目录libpcap-1.4.0，执行 ./configure。执行到这一步可能会遇到缺少flex包的问题：

configure: error: Your operating system's lex is insufficient to compile
libpcap. flex is a lex replacement that has many advantages, including
being able to compile libpcap. For more information, see
http://www.gnu.org/software/flex/flex.html .

解决办法：安装flex包---- sudo apt-get install flex

5，make

可能会遇到yacc包错误：

yacc -d grammar.y
make: yacc: Command not found
Makefile:460: recipe for target 'grammar.c' failed
make: *** [grammar.c] Error 127

解决办法：安装byacc包--- sudo apt-get install -y byacc

6，安装： sudo make install

7，完成安装：可用 man pcap查看帮助

main.c

    #include <pcap.h>      #include <stdio.h>            int main()      {        char errBuf[PCAP_ERRBUF_SIZE], * device;                device = pcap_lookupdev(errBuf);                if(device)        {          printf("success: device: %s\n", device);        }        else        {          printf("error: %s\n", errBuf);        }                return 0;      }

可以成功编译，不过运行的时候却提示找不到libpcap.so.1，因为libpcap.so.1默认安装到了/usr/local/lib下，我们做一个符号链接到/usr/lib/下即可：ln -s /usr/local/lib/libpcap.so.1 /usr/lib/

test.c

    #include<stdio.h>    #include<string.h>    #include<pcap.h>    #include<sys/socket.h>    #include<netinet/in.h>    #include<netinet/if_ether.h>    #include<netinet/ip.h>    #include<netinet/udp.h>    #include<netinet/tcp.h>    #include<netinet/ip_icmp.h>    #define max 1024   int main(int argc,char *argv[])    {        pcap_if_t *alldev;        pcap_if_t *p;        char error[100];                int i=0,num;         if(pcap_findalldevs(&alldev,error)==-1)        {            printf("find all devices is error\n");            return 0;        }        for(p=alldev;p;p=p->next)        {            printf("%d:%s\n",++i,p->name);            if(p->description)            {                printf("%s\n",p->description);            }        }        return 1;    }

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