How to get IP address from sockaddr

Question

I want to try and get the ip address of a client after calling accept. This is what I have so far, but I just end up getting some long number that is clearly not an ip addr

Answer 1

You can use getnameinfo function that is available for Linux and Windows. From Linux man pages https://linux.die.net/man/3/getnameinfo:

getnameinfo - address-to-name translation in protocol-independent manner

Example for C/C++ (Linux):

#include 
#include 
#include 

char host[NI_MAXHOST]; // to store resulting string for ip
if (getnameinfo((sockaddr*)&client, c_len,
                  host, NI_MAXHOST, // to try to get domain name don't put NI_NUMERICHOST flag
                  NULL, 0,          // use char serv[NI_MAXSERV] if you need port number
                  NI_NUMERICHOST    // | NI_NUMERICSERV
               ) != 0) {
   //handle errors
} else {
    printf("Connected to: %s\n", host);     
}

This is clean up of @enthusiasticgeek answer. His answer has a working example with accept call.