小编use*_*279的帖子

嗨,我是Linux新手,有一个与套接字相关的项目.我面临的问题是,当我使用输入eth0 for interface和我的路由器的IP地址 运行代码时,./mycode eth0 192.168.1.1它会出错

您无权在该设备上捕获(套接字:不允许操作)

我从链接中获取的代码是:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pcap.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <netinet/if_ether.h>
#include <sys/ioctl.h>

int main(int argc,const char* argv[]) {
    // Get interface name and target IP address from command line.
    if (argc<2) {
        fprintf(stderr,"usage: send_arp <interface> <ipv4-address>\n");
        exit(1);
    }
    const char* if_name=argv[1];
    const char* target_ip_string=argv[2];

    // Construct Ethernet header (except for source MAC address).
    // (Destination set to broadcast address, FF:FF:FF:FF:FF:FF.)
    struct ether_header header; …