diff ifconfig/af_inet.c ifconfig_with_cidr_mode/af_inet.c
58a59,66
> int hex2cidr(int i);
> int hex2cidr(int i)
> {
>         i = i - ((i >> 1) & 0x55555555);
>             i = (i & 0x33333333) + ((i >> 2) & 0x33333333);
>                 return (((i + (i >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24;
> }
> 
70c78
< 	printf("\tinet %s ", inet_ntoa(sin->sin_addr));
---
> 	printf("\tinet %s", inet_ntoa(sin->sin_addr));
76c84
< 		printf("--> %s ", inet_ntoa(sin->sin_addr));
---
> 		printf(" --> %s ", inet_ntoa(sin->sin_addr));
79a88
>         if((ifa->ifa_flags & IFF_POINTOPOINT) ||(!cidr)){
82,89c91,102
< 	printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
< 
< 	if (ifa->ifa_flags & IFF_BROADCAST) {
< 		sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
< 		if (sin != NULL && sin->sin_addr.s_addr != 0)
< 			printf("broadcast %s", inet_ntoa(sin->sin_addr));
< 	}
< 	putchar('\n');
---
> 	        printf(" netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr));
>             if (ifa->ifa_flags & IFF_BROADCAST) {
> 	        	sin = (struct sockaddr_in *)ifa->ifa_broadaddr;
> 		        if (sin != NULL && sin->sin_addr.s_addr != 0)
> 			    printf("broadcast %s", inet_ntoa(sin->sin_addr));
> 	    };
> 	    putchar('\n');
>         }else{ //XXX:Here we go to print CIDR mask instead of hex mask
> 	if (sin == NULL)
> 		sin = &null_sin;
>                 printf("/%d\n", (hex2cidr((int)ntohl(sin->sin_addr.s_addr))));
>         };
diff ifconfig/ifconfig.c ifconfig_with_cidr_mode/ifconfig.c
94c94
< 
---
> int     cidr=0;
137c137,138
< 	"       ifconfig %s[-d] [-m] [-u] [-v]\n",
---
> 	"       ifconfig %s[-d] [-m] [-u] [-v]\n"
>         "       ifconfig [-D]\n",
157a159
> 
159c161
< 	strlcpy(options, "adklmnuv", sizeof(options));
---
> 	strlcpy(options, "aDdklmnuv", sizeof(options));
163a166,168
>                 case 'D':       /* output IPv4 prefixes in CIDR format */
>                         cidr++;
>                         break;
diff ifconfig/ifconfig.h ifconfig_with_cidr_mode/ifconfig.h
44a45,46
> 
> 
134a137
> extern  int cidr;