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/*
* Copyright (C) 2003 Luca Deri <deri@ntop.org>
* Andreas Pfaller <apfaller@yahoo.com.au>
*
* http://www.ntop.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#define VERSION "2.0"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <getopt.h>
#include "p2clib.h"
typedef struct IPNode
{
struct IPNode *b[2];
char cc[8];
} IPNode;
IPNode *Head;
char *OptTableFilename="./p2c.opt.table";
/* ************************************************************************* */
void addNodeInternal(uint32_t ip, int prefix, char *country)
{
IPNode *p1=Head;
IPNode *p2;
int i, b;
for (i=0; i<prefix; i++) {
b=(ip>>(31-i)) & 0x1;
if (!p1->b[b]) {
if (!(p2=malloc(sizeof(IPNode))))
exit(1);
memset(p2, 0, sizeof(IPNode));
p1->b[b]=p2;
}
else
p2=p1->b[b];
p1=p2;
}
if (p2->cc[0]==0) {
strncpy(p2->cc, country, sizeof(p2->cc));
p2->cc[sizeof(p2->cc)-1]=0;
}
}
/* ************************************************************************* */
void initIPCountryTable(void)
{
FILE *fd;
if ((Head=malloc(sizeof(IPNode)))==NULL)
exit(1);
strcpy(Head->cc, "***");
Head->b[0]=NULL;
Head->b[1]=NULL;
fd = fopen(OptTableFilename, "r");
if (fd==NULL) {
perror(OptTableFilename);
exit(EXIT_FAILURE);
}
while (!feof(fd)) {
char buff[256];
char *strtokState, *cc, *ip, *prefix;
if (fgets(buff, sizeof(buff), fd)==NULL)
continue;
if ((cc=strtok_r(buff, ":", &strtokState))==NULL)
continue;
if ((ip=strtok_r(NULL, "/", &strtokState))==NULL)
continue;
if ((prefix=strtok_r(NULL, "\n", &strtokState))==NULL)
continue;
addNodeInternal(xaton(ip), atoi(prefix), cc);
}
fclose(fd);
}
/* ************************************************************************* */
char *ip2CountryCode(uint32_t ip)
{
IPNode *p=Head;
int i, b;
char *cc="";
i=0;
while (p!=NULL) {
if (p->cc[0]!=0)
{
cc=p->cc;
printf("%s/%d ", cc, i);
}
b=(ip>>(31-i)) & 0x1;
p=p->b[b];
i++;
}
return cc;
}
/* ************************************************************************* */
void usage(void)
{
fprintf(stderr, "lookuptest %s\n", VERSION);
fprintf(stderr, "Usage: lookuptest [OPTION]... [IP]...\n");
fprintf(stderr, "Lookup country codes for specified IPs.\n");
fprintf(stderr, "If no IPs are specified on the commandline a list of IPs is read from stdin.\n\n");
fprintf(stderr, " -t fname Read mapping table from fname\n\n");
fprintf(stderr, "Example: ./lookuptest 19.203.239.24, returns:\n\n");
fprintf(stderr, "19.203.239.24: ***/0 US/6 IL/29\n\n");
fprintf(stderr, " Which means the address, 19.203.239.24 is contained in the root block ***/0 (always).\n");
fprintf(stderr, " More specifically it is contained in a /6 listed as in the US and\n");
fprintf(stderr, " most specifically it is in a /29 which is listed as in IL (Israel).\n\n");
exit(EXIT_FAILURE);
}
/* ************************************************************************* */
void parseOptions(int argc, char *argv[])
{
int c;
while ((c=getopt(argc, argv, "?ht:"))!=-1) {
switch (c) {
case 't':
OptTableFilename=optarg;
break;
case '?':
case 'h':
default:
usage();
break;
}
}
}
/* ************************************************************************* */
int main(int argc, char *argv[])
{
int i;
parseOptions(argc, argv);
initIPCountryTable();
if (optind>=argc) {
while (!feof(stdin)) {
char buff[64];
fgets(buff, sizeof(buff)-1, stdin);
if (!feof(stdin)) {
ip2CountryCode(xaton(buff));
printf("\n");
}
}
}
else {
for (i=optind; i<argc; i++) {
printf("%s: ", argv[i]);
ip2CountryCode(xaton(argv[i]));
printf("\n");
}
}
exit(EXIT_SUCCESS);
}
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