How to convert sin_addr.S_un into char *?

I need to get an IP address from a sender after he sent something to me. I'm using UDP socket, so the IP address of the sender will be automatically registered into sin_addr structure since I'm using recvfrom() function.

How do I mani开发者_运维技巧pulate the sin_addr structure and convert it into a char *?

Thank you.

inet_ntoa ?

struct sockaddr_in in_sa; 
char* ip_addr_text = inet_ntoa( in_sa.sin_addr );

If you want to keep it for later use you should make a copy, for instance:

std::string ip_txt( inet_ntoa( in_sa.sin_addr ) );
// other stuff
std::cout << ip_txt << std::endl;