/*
* Totally eleetin class B, C, and single IP address scanner/lookup
* program. Hey! It even shows aliases! Make sure you give the
* correct address format with the correct switch(es). The switches
* are as follows:
* b - scan this class B network (xxx.xxx)
* c - scan this class C network (xxx.xxx.xxx)
* s - give the the hostname of this specific address (xxx.xxx.xxx.xxx)
* a - show hostname aliases also
* x - address provided is in hexadecimal
*
* Oh, a small note: if yer actually gonna use a hex address, make
* sure to put the 'x' switch before anything else. :)
* "Team OpenFire"
* max-q [L0cK]
*/
#include
#include
#include
#include "netdb.h"
struct hostent *gethostbyaddr();
void usage();
void bad_addr();
main(argc, argv)
int argc;
char *argv[];
{
char addr[4],
**ptr,
*fmt;
int arg, i, j,
a0, a1, a2, a3,
classB, classC, single, hex, alias;
extern char *optarg;
struct hostent *host;
classB = classC = single = alias = hex = 0;
i = j = 0;
while((arg = getopt(argc,argv,"xb:c:s:a")) != EOF) {
switch(arg) {
case 'x':
hex++;
break;
case 'b':
classB++;
if(hex)
fmt = "%x.%x";
else
fmt = "%d.%d";
sscanf(optarg, fmt, &a0, &a1);
break;
case 'c':
classC++;
if(hex)
fmt = "%x.%x.%x";
else
fmt = "%d.%d.%d";
sscanf(optarg, fmt, &a0, &a1, &a2);
break;
case 's':
single++;
if(hex)
fmt = "%x.%x.%x.%x";
else
fmt = "%d.%d.%d.%d";
sscanf(optarg, fmt, &a0, &a1, &a2, &a3);
break;
case 'a':
alias++;
break;
default:
usage(argv[0]);
break;
/* not reached */
}
}
if(classB == 0 && classC == 0 && single == 0)
usage(argv[0]);
addr[0] = (unsigned char)a0;
addr[1] = (unsigned char)a1;
if(a0>255||a0<0 br="br">bad_addr(a0);
if(a1>255||a1<0 br="br">bad_addr(a1);
if(classB) {
printf("Scanning Class B network %d.%d...\n", a0, a1);
while(j<256 br="br">a2=j;
addr[2] = (unsigned char)a2;
jmpC:
printf("Scanning Class C network %d.%d.%d...\n", a0, a1, a2);
while(i<256 br="br">a3=i;
addr[3] = (unsigned char)a3;
jmpS:
if ((host = gethostbyaddr(addr, 4, AF_INET)) != NULL) {
printf("%d.%d.%d.%d => %s\n", a0, a1, a2, a3, host->h_name);
ptr = host->h_aliases;
if(alias)
while (*ptr != NULL) {
printf("%d.%d.%d.%d => %s (alias)\n", a0, a1, a2, a3, *ptr);
ptr++;
}
} else if(single)
printf("Cannot resolve %d.%d.%d.%d\n", a0, a1, a2, a3);
if(single)
exit(0);
i++;
}
if(classC)
exit(0);
i=0;
j++;
}
} else if(classC) {
addr[2] = (unsigned char)a2;
if(a2>255||a2<0 br="br">bad_addr(a2);
goto jmpC;
} else if(single) {
addr[2] = (unsigned char)a2;
addr[3] = (unsigned char)a3;
if(a2>255||a2<0 br="br">bad_addr(a2);
if(a3>255||a3<0 br="br">bad_addr(a3);
goto jmpS;
}
exit(0);
}
void
usage(name)
int *name;
{
fprintf(stderr, "usage: %s [-x] [-a] [-b||-c||-s] xxx.xxx[.xxx[.xxx]]\n",
name);
exit(1);
}
void
bad_addr(addr)
int *addr;
{
printf("Value %d is not valid.\n", addr);
exit(0);
}
