/* makeaddr.c: *  * Demonstrate inet_lnaof, inet_netof * and inet_makeaddr(3) functions; */#include <stdio.h>#include <unistd.h>#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>intmain(int argc,char **argv) {    int x;    struct sockaddr_in adr_inet;/* AF_INET */    const char *addr[] = {        "44.135.86.12",        "127.0.0.1",        "172.16.23.95",        "192.168.9.1"    };    unsigned long net, hst;    for ( x=0; x<4; ++x ) {        /*         * Create a socket address:         */        memset(&adr_inet,0,sizeof adr_inet);        adr_inet.sin_family = AF_INET;        adr_inet.sin_port = htons(9000);        if ( !inet_aton(addr[x],                  &adr_inet.sin_addr) )            puts("bad address.");        /*         * Split address into Host & Net ID         */        hst = inet_lnaof(adr_inet.sin_addr);        net = inet_netof(adr_inet.sin_addr);        printf("%14s : net=0x%08lX host=0x%08lX\n",            inet_ntoa(adr_inet.sin_addr),net,hst);        /*         * Zero the address to prove later that         * we can reconstruct this value :         */        memset(&adr_inet,0,sizeof adr_inet);        adr_inet.sin_family = AF_INET;        adr_inet.sin_port = htons(9000);        adr_inet.sin_addr =            inet_makeaddr(net,hst);        /*         * Now display the reconstructed         * address :         */        printf("%14s : %s\n\n",            "inet_makeaddr",            inet_ntoa(adr_inet.sin_addr));    }    return 0;}