Host name to IP address

What's the IP address of that host? Use this convenient C method to check it out.
Although it's written in C, it works also in Objective-C and so in all your iOS and Mac OS projects.


/** Converts a host name to IP address.

 Actual return data will be stored in the two parameters "addrp" and "familyp".

 @param name The host name to convert.
 @param addrp A pointer to a in_addr struct. This parameter will be overwritten with actual IP address.
 @param familyp Address family (must be AF_INET). This parameter could be overwitten with actual address family type.

 */
void host2addr(char *name, struct in_addr *addrp, short *familyp) {
    struct hostent *hp;
    if ((hp=gethostbyname(name))) {
        bcopy(hp->h_addr,(char *)addrp,hp->h_length);
        if (familyp) *familyp = hp->h_addrtype;
    } else if ((addrp->s_addr=inet_addr(name)) != -1) {
        if (familyp) *familyp = AF_INET;
    } else {
        fprintf(stderr, "Unknown host : %s\n",name);
        exit(1);
    }
}


Download the ready-for-use source file (.m) of Host name to IP address