inet_lnaof, inet_netof and inet_makeaddr sample c code

 /* makeaddr.c:
 *
 * Demonstrate inet_lnaof, inet_netof
 * and inet_makeaddr(3) functions;
 */

 #include <stdio.h>

 #include <unistd.h>

 #include <stdlib.h>

 #include <errno.h>

 #include <string.h>

 #include <sys/types.h>

 #include <sys/stat.h>

 #include <sys/socket.h>

 #include <sys/un.h>

 #include <netinet/in.h>

 #include <arpa/inet.h>

int  main(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));
 }

}

/*********************************************************
output:
*******

[sgupta@rhel55x86 chap3]$ ./makeaddr
  44.135.86.12 : net=0x0000002C host=0x0087560C
 inet_makeaddr : 44.135.86.12


     127.0.0.1 : net=0x0000007F host=0x00000001
 inet_makeaddr : 127.0.0.1


  172.16.23.95 : net=0x0000AC10 host=0x0000175F
 inet_makeaddr : 172.16.23.95


   192.168.9.1 : net=0x00C0A809 host=0x00000001
 inet_makeaddr : 192.168.9.1


[sgupta@rhel55x86 chap3]$

*********************************************************/