Fix some comments to reflect reality (in some cases I made changes to code but not to the comments). Change some instances of 'inline' to '__inline' to pacify gcc -ansi -pedantic. Use rcsid strings more consistently. Make 'oldaddr' static in yp_access(). Use strcpy()/strcat() in yp_open_db_cache() instead of snprintf(). (Seems to be a little faster this way.)
116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1995
|
|
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Bill Paul.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Id: yp_dnslookup.c,v 1.2 1996/05/01 02:37:46 wpaul Exp $
|
|
*/
|
|
|
|
/*
|
|
* Do standard and reverse DNS lookups using the resolver library.
|
|
* Take care of all the dirty work here so the main program only has to
|
|
* pass us a pointer to an array of characters.
|
|
*
|
|
* We have to use direct resolver calls here otherwise the YP server
|
|
* could end up looping by calling itself over and over again until
|
|
* it disappeared up its own belly button.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <sys/param.h>
|
|
#include <netdb.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/socket.h>
|
|
#include <arpa/inet.h>
|
|
#include "yp_extern.h"
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] = "$Id: yp_dnslookup.c,v 1.2 1996/05/01 02:37:46 wpaul Exp $";
|
|
#endif
|
|
|
|
extern struct hostent *_gethostbydnsname __P(( char * ));
|
|
extern struct hostent *_gethostbydnsaddr __P(( const char *, int, int ));
|
|
|
|
static char *parse(hp)
|
|
struct hostent *hp;
|
|
{
|
|
static char result[MAXHOSTNAMELEN * 2];
|
|
int len,i;
|
|
struct in_addr addr;
|
|
|
|
len = 16 + strlen(hp->h_name);
|
|
for (i = 0; hp->h_aliases[i]; i++)
|
|
len += strlen(hp->h_aliases[i]) + 1;
|
|
|
|
bzero(result, sizeof(result));
|
|
|
|
bcopy(hp->h_addr, &addr, sizeof(struct in_addr));
|
|
snprintf(result, sizeof(result), "%s %s", inet_ntoa(addr), hp->h_name);
|
|
|
|
for (i = 0; hp->h_aliases[i]; i++) {
|
|
strcat(result, " ");
|
|
strcat(result, hp->h_aliases[i]);
|
|
}
|
|
|
|
return ((char *)&result);
|
|
}
|
|
|
|
char *yp_dnsname(address)
|
|
char *address;
|
|
{
|
|
struct hostent *hp;
|
|
|
|
if (strchr(address, '@'))
|
|
return (NULL);
|
|
if ((hp = (struct hostent *)_gethostbydnsname(address)) == NULL)
|
|
return (NULL);
|
|
|
|
return(parse(hp));
|
|
}
|
|
|
|
char *yp_dnsaddr(address)
|
|
const char *address;
|
|
{
|
|
struct hostent *hp;
|
|
struct in_addr addr;
|
|
|
|
if (strchr(address, '@'))
|
|
return (NULL);
|
|
if (!inet_aton(address, &addr))
|
|
return (NULL);
|
|
if ((hp = (struct hostent *)_gethostbydnsaddr((const char *)&addr,
|
|
sizeof(unsigned long), AF_INET)) == NULL)
|
|
return (NULL);
|
|
|
|
return(parse(hp));
|
|
}
|