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[thirdparty/sarg.git] / ip2name.c

/*
 * SARG Squid Analysis Report Generator      http://sarg.sourceforge.net
 *                                                            1998, 2010
 *
 * SARG donations:
 *      please look at http://sarg.sourceforge.net/donations.php
 * Support:
 *     http://sourceforge.net/projects/sarg/forums/forum/363374
 * ---------------------------------------------------------------------
 *
 *  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, USA.
 *
 */

#include "include/conf.h"
#include "include/defs.h"
#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h> //define getnameinfo on windows
#endif

void ip2name(char *ip,int ip_len)
{
#ifdef HAVE_GETNAMEINFO
	struct sockaddr_storage sa;
	char host[NI_MAXHOST];
	int n1,n2,n3,n4,next=0;
	int error;

	memset(&sa,0,sizeof(sa));
	if (sscanf(ip,"%d.%d.%d.%d%n",&n1,&n2,&n3,&n4,&next)==4 && ip[next]=='\0') {
		struct sockaddr_in *s4=(struct sockaddr_in *)&sa;
		if (inet_pton(AF_INET,ip,&s4->sin_addr)!=1) return;
		sa.ss_family=AF_INET;
	} else {
		struct sockaddr_in6 *s6=(struct sockaddr_in6 *)&sa;
		if (inet_pton(AF_INET6,ip,&s6->sin6_addr)!=1) return;
		sa.ss_family=AF_INET6;
	}
	error=getnameinfo((struct sockaddr *)&sa,sizeof(sa),host,sizeof(host),NULL,0,0);
	if (error==0)
	{
		strncpy(ip,host,ip_len-1);
		ip[ip_len-1]='\0';
	} else {
		debuga(_("IP to name resolution (getnameinfo) on IP address %s failed with error %d - %s\n"),ip,error,gai_strerror(error));
	}
#else
	struct in_addr addr;
	struct hostent *hp;
	char **p;

#ifdef HAVE_INET_ATON
	if (inet_aton(ip,&addr) == 0)
		return;
#else
	addr.s_addr=inet_addr(ip);
	if (addr.s_addr==-1) return;
#endif

	hp = gethostbyaddr((void *)&addr, sizeof (addr), AF_INET);
	if (hp == NULL)
		return;

	for (p = hp->h_addr_list; *p != 0; p++) {
		struct in_addr in;

		(void) memcpy(&in.s_addr, *p, sizeof (in.s_addr));
		strncpy(ip,hp->h_name,ip_len-1);
		ip[ip_len-1]=0;
	}
#endif
	return;
}

void name2ip(char *name)
{
	struct in_addr ia;
	struct hostent *hp;
	char *port;
	char n1[4];
	char n2[4];
	char n3[4];
	char n4[4];
	struct getwordstruct gwarea;

	port=strchr(name,':');
	if (port) *port=0;

	if((hp=gethostbyname(name))==NULL)
		return;

	memcpy(&ia.s_addr,hp->h_addr_list[0],sizeof(ia.s_addr));
	ia.s_addr=ntohl(ia.s_addr);
	getword_start(&gwarea,inet_ntoa(ia));
	if (getword(n4,sizeof(n4),&gwarea,'.')<0 || getword(n3,sizeof(n3),&gwarea,'.')<0 ||
			getword(n2,sizeof(n2),&gwarea,'.')<0 || getword(n1,sizeof(n1),&gwarea,0)<0) {
		printf("SARG: Maybe you have a broken record or garbage in your %s ip address.\n",gwarea.beginning);
		exit(EXIT_FAILURE);
	}
	sprintf(name,"%s.%s.%s.%s",n1,n2,n3,n4);

	return;
}