ip2name.c

   1 /*
   2  * AUTHOR: Pedro Lineu Orso                         pedro.orso@gmail.com
   3  *                                                            1998, 2008
   4  * SARG Squid Analysis Report Generator      http://sarg.sourceforge.net
   5  *
   6  * SARG donations:
   7  *      please look at http://sarg.sourceforge.net/donations.php
   8  * ---------------------------------------------------------------------
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  23  *
  24  */
  25
  26 #include "include/conf.h"
  27
  28 void ip2name(char *ip)
  29 {
  30    u_long addr;
  31    struct hostent *hp;
  32    char **p;
  33
  34    if ((int)(addr = inet_addr(ip)) == -1)
  35       return;
  36
  37    hp = gethostbyaddr((char *)&addr, sizeof (addr), AF_INET);
  38    if (hp == NULL)
  39       return;
  40
  41    for (p = hp->h_addr_list; *p != 0; p++) {
  42       struct in_addr in;
  43
  44       (void) memcpy(&in.s_addr, *p, sizeof (in.s_addr));
  45       (void) sprintf(ip,"%s", hp->h_name);
  46    }
  47
  48    return;
  49 }
  50
  51 void name2ip(char *name)
  52 {
  53    struct in_addr ia;
  54    struct hostent *hp;
  55    char   work[MAXLEN];
  56    char   n1[4];
  57    char   n2[4];
  58    char   n3[4];
  59    char   n4[4];
  60
  61    if(strstr(name,":") > 0) {
  62       if (getword(work,sizeof(work),name,':')<0) {
  63          printf("SARG: Maybe you have a broken record or garbage in your %s name.\n",name);
  64          exit(1);
  65       }
  66       strcpy(name,work);
  67    }
  68
  69    if((hp=gethostbyname(name))==NULL)
  70       return;
  71    else {
  72       memcpy(&ia.s_addr,hp->h_addr_list[0],sizeof(ia.s_addr));
  73       ia.s_addr=ntohl(ia.s_addr);
  74       sprintf(name,"%s",inet_ntoa(ia));
  75       if (getword(n4,sizeof(n4),name,'.')<0 || getword(n3,sizeof(n3),name,'.')<0 ||
  76           getword(n2,sizeof(n2),name,'.')<0 || getword(n1,sizeof(n1),name,0)<0) {
  77          printf("SARG: Maybe you have a broken record or garbage in your %s ip address.\n",name);
  78          exit(1);
  79       }
  80       sprintf(name,"%s.%s.%s.%s",n1,n2,n3,n4);
  81
  82    }
  83
  84    return;
  85 }