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 #include "include/defs.h"
  28
  29 void ip2name(char *ip,int ip_len)
  30 {
  31    u_long addr;
  32    struct hostent *hp;
  33    char **p;
  34
  35    if ((int)(addr = inet_addr(ip)) == -1)
  36       return;
  37
  38    hp = gethostbyaddr((char *)&addr, sizeof (addr), AF_INET);
  39    if (hp == NULL)
  40       return;
  41
  42    for (p = hp->h_addr_list; *p != 0; p++) {
  43       struct in_addr in;
  44
  45       (void) memcpy(&in.s_addr, *p, sizeof (in.s_addr));
  46       strncpy(ip,hp->h_name,ip_len-1);
  47       ip[ip_len-1]=0;
  48    }
  49
  50    return;
  51 }
  52
  53 void name2ip(char *name)
  54 {
  55    struct in_addr ia;
  56    struct hostent *hp;
  57    char *port;
  58    char n1[4];
  59    char n2[4];
  60    char n3[4];
  61    char n4[4];
  62
  63    port=strchr(name,':');
  64    if (port) *port=0;
  65
  66    if((hp=gethostbyname(name))==NULL)
  67       return;
  68
  69    memcpy(&ia.s_addr,hp->h_addr_list[0],sizeof(ia.s_addr));
  70    ia.s_addr=ntohl(ia.s_addr);
  71    strcpy(name,inet_ntoa(ia));
  72    if (getword(n4,sizeof(n4),name,'.')<0 || getword(n3,sizeof(n3),name,'.')<0 ||
  73          getword(n2,sizeof(n2),name,'.')<0 || getword(n1,sizeof(n1),name,0)<0) {
  74       printf("SARG: Maybe you have a broken record or garbage in your %s ip address.\n",name);
  75       exit(1);
  76    }
  77    sprintf(name,"%s.%s.%s.%s",n1,n2,n3,n4);
  78
  79    return;
  80 }