nisplus.c

linux下远程启动服务/bootp服务器源代码

/*
 *
 *   bootpd_nis: simple BOOTP server with NIS maps support
 *   Copyright (C) 2005 <[e-mail]>
 *
 *   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
 *
 *
 *  $Id: nisplus.c,v 1.2 2005/03/02 21:03:41 bfleisch Exp $
 *
 */


#include "nisplus.h"


host_info*
get_host_info_nisplus(const char* hwaddr)
{

	static host_info hinfo;
  nis_result *res;
  nis_result *res2;
  struct entry_obj *entry;
  struct entry_col *col;  
  nis_object* obj;  

  char req[NIS_MAXNAMELEN];  
  char hw[3 * 6];
  int i,j;


	memset(&hinfo, 0, sizeof(hinfo));
  
	memset (hw, 0, 3 * 6);
  for (i = 0; i < 6; i++)
    sprintf (hw + strlen (hw), "%0x:", (unsigned char)hwaddr[i]);

  hw[strlen (hw) - 1] = '\0';
  
  snprintf(req, NIS_MAXNAMELEN, ETHERS_NISPLUSQUERY, hw );
  
  if  (g_flags & F_DEBUG)
  	log_msg(LOG_DEBUG, "NIS+ lookup: %s", req);

  res = nis_list(req,  
          FOLLOW_LINKS |FOLLOW_PATH | EXPAND_NAME | RETURN_RESULT, 
          NULL, NULL);    
            
  if ((! res) || ( ! _NIS_SUCCESS(res->status)))
  {
  	if (res)
	  	log_msg(LOG_NOTICE, "NIS+ error: %s (=%i)", nis_sperrno(res->status), res->status);
    else
    	log_msg(LOG_NOTICE, "NIS+ error: nis_lookup() returns NULL !");
		      
    if (res) nis_freeresult(res);
    return NULL;
  }
  
  
  for (i=0; i < res->objects.objects_len ; i++)
  {
  
  	obj =&(res->objects.objects_val[i]);
    if (obj->zo_data.zo_type != ENTRY_OBJ) continue;
    if (!ENTRY_VAL(obj, 1)) continue;
    
    snprintf(hinfo.hostname, 256, ENTRY_VAL (obj, 1));
    
   
    /*
     * now lookup IP address for this host
     *
     */

     snprintf(req, NIS_MAXNAMELEN, HOSTS_NISPLUSQUERY, hinfo.hostname);

     if  (g_flags & F_DEBUG)
    	 log_msg(LOG_DEBUG, "NIS+ lookup: %s", req);
      
     res2 = nis_list(req,  
          FOLLOW_LINKS |FOLLOW_PATH | EXPAND_NAME | RETURN_RESULT, 
          NULL, NULL);    
          
     if ((! res2) || ( ! _NIS_SUCCESS(res2->status)))
     {
    	if (res2)
	   	log_msg(LOG_NOTICE, "NIS+ error: %s (=%i)", nis_sperrno(res2->status), res2->status);
      else
      	log_msg(LOG_NOTICE, "NIS+ error: nis_lookup() returns NULL !");
		      
      if (res2) nis_freeresult(res2);
      nis_freeresult(res);      
      return NULL;
     }          
    
    for (j=0; j < res2->objects.objects_len ; j++)
    {
     	obj =&(res2->objects.objects_val[j]);
      if (obj->zo_data.zo_type != ENTRY_OBJ) continue;
      if (!ENTRY_VAL(obj, 2)) continue;  

     hinfo.addr.s_addr = inet_addr ( (char*) ENTRY_VAL(obj, 2));
      
      
      log_msg(LOG_DEBUG, "NIS+ found entry: ip=%s, hostname=%s", 
        (char*) ENTRY_VAL(obj, 2),
        hinfo.hostname);
        
      nis_freeresult(res);
      nis_freeresult(res2);
      
      return &hinfo;
    }
    
    
   }
	
  nis_freeresult(res);
	return NULL;

}