socket error: Permission denied!

[DoSeek]

`

  client_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP);

if (client_fd == -1)

{

    printf("socket error: %s!\n", strerror(errno));

    return ret;

}

` test on CentOS7, Ubutun 18.04, throw exception: [myk@sz Test]$ ./ping www.baidu.com socket error: Permission denied! ping result: -1

even though use 'sudo': [myk@sz Test]$ sudo ./ping www.baidu.com [sudo] password for myk: socket error: Permission denied! ping result: -1

[bgylde]

Have a try for socket(AF_INET, SOCK_RAW, IPPROTO_ICMP). You need to assemble the ICMP package yourself.