/*
 * Poepie.c v1.0 mass Domain name resolver by sacrine(C)
 * http://www.netric.org // sacrine@netric.org
 * irc.netric.org // #netric
 *
 * Greets: all members of Netric, my girlfriend ;)
 * Sat Jul 20:08:46 CEST 2002
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <errno.h>
#include <unistd.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <getopt.h>

#define VERSION 	1.0

void help(char *prog)
{
        printf ("%s [options] <start ip> <stop ip>
                      -h    - prints this help function 
                      -l    - output logfile for resolved hostnames\n",prog);
}
int main(int argc, char *argv[])
{
	unsigned long atm;
	char *atmname;
	int c,i,y,digit;
	struct hostent *aap;
	struct in_addr addr;
	FILE *out=NULL;
    
	while((c=getopt(argc,argv,"hl:")) !=EOF) 
{
	 switch(c) {
		 case 'h':
			help(argv[0]);
			exit(1);
			break;
		 case 'l':
			out=fopen(optarg,"w");
			if(out==NULL) perror("file()");
			fprintf(stdout, "writing results to %s\n",optarg);
			break;
		default:
	                fprintf(stderr,"Usage: %s [l:h] <start ip> <stop ip> \n", argv[0]);
        	        fprintf(stderr,"       %s [l:h] 195.0.0.0 195.0.0.255\n", argv[0]);
               		exit(1);
			break;
} }

if (argv[optind+1] == NULL || argv[optind] == NULL) {
                        fprintf(stderr,"Usage: %s [l:h] <start ip> <stop ip> \n", argv[0]);
                        fprintf(stderr,"       %s [l:h] 195.0.0.0 195.0.0.255\n", argv[0]);
                        exit(1);
}
digit=atoi(argv[optind+1]);
aap=gethostbyname(argv[optind]);
if (!out) out = stdout;
if(!aap) {
	perror("gethostbyname");
	return -1; }


	atm=*((unsigned long *)aap->h_addr);
	fprintf(out,"--------------------------------------------------------------\n");
	fprintf(out,"###  Mass DNS resolver  ###\n");
	fprintf(out,"     Poepie.c 1.0\n");
        fprintf(out,"     Netric Security\n");
        fprintf(out,"###  written by sacrine ###\n");
	fprintf(out,"--------------------------------------------------------------\n\n");

 for (i=0;i<digit;i++)  {
	 addr.s_addr = atm;
	 atmname = inet_ntoa(addr);
	 aap=gethostbyaddr((char *)&atm,sizeof(struct in_addr),AF_INET);
	 fprintf(out, "%s\t<-->\t%s\n",atmname,(aap) ? aap->h_name : atmname);
	 y=0;
	 if (aap) while (aap->h_aliases[y] != NULL) 
		 fprintf(out,"\r%s",aap->h_aliases[y++]);
	 atm += 0x01000000;
 }
fprintf(out,"--------------------------------------------------------------\n");
return(0);
}