Uri to Hostname in C (GNU-C99)

Another C function which works quite well and has no bugs that I know of yet...

Updated: fixed this now, leak free!

/*
 * File:   utohn.c
 * Author: Adam K Dean
 * Description: gets a hostname from an uri
 *
 * Created on 11 January 2011, 22:12
 */

/* int utohn(char *uri, char *hostname)
 * Uri to Hostname
 * Author: Adam K Dean
 */
char *utohn(char *uri)
{
    char *pch, *hostname;
    if ((pch = strstr(uri, "://")) != NULL)
    {
        pch += 3;
        int i = 0;
        while(pch[i] != '/' && pch[i] != ':' && pch[i] != '\0') i++;
        hostname = (char *)calloc(i + 1, sizeof(char));
        return strncpy(hostname, pch, i);
    }
    else return NULL;
}

and usage code:

int main(int argc, char** argv)
{
    char hn1[] = "http://www.gentoo.org/";
    char hn2[] = "http://www.gentoo.org/docs/";
    char hn3[] = "http://www.gentoo.org:80/";
    char hn4[] = "127.0.0.1";

    printf("%s -> %s\n", hn1, utohn(hn1));
    printf("%s -> %s\n", hn2, utohn(hn2));
    printf("%s -> %s\n", hn3, utohn(hn3));
    printf("%s -> %s\n", hn4, utohn(hn4));

    return (EXIT_SUCCESS);
}

and results:

http://www.gentoo.org/ -> www.gentoo.org http://www.gentoo.org/docs/ -> www.gentoo.org http://www.gentoo.org:80/ -> www.gentoo.org 127.0.0.1 -> (null)

P.S, I have no affiliation with gentoo, and actually use centos.. I just like how easy it is to type gentoo..very nice!

Enjoy