conf.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: conf.c,v 1.2 2005/03/02 21:03:41 bfleisch Exp $
 *
 */


#include "conf.h" 
 
struct conf_map
{
 int id;
 char* key;
};

enum
{
  C_NETMASK,
  C_NAMESERV,
  C_GW_ADDR,
  C_BROADCAST,
  C_IFNAME,
  C_LOGFILE,
  C_BOOTFILE,
  C_KEY_NOT_FOUND
};

static struct conf_map maps[] =
{
  { C_NETMASK,    "netmask"    },
  { C_NAMESERV,   "nameserver" },
  { C_GW_ADDR,    "gateway"    },
  { C_BROADCAST,  "broadcast"  },
  { C_IFNAME,     "interface"  },
  { C_LOGFILE,    "logfile"    },
  { C_BOOTFILE,   "bootfile"   },  
  { C_KEY_NOT_FOUND, NULL      }
};


static int lookup_key(const char* kword)
{
  int i;
  
  i=0;
  while ( maps[i].key)
  {
    if ( strcasecmp(kword, maps[i].key)==0)
      return maps[i].id;
      
    i++;
  }

  return C_KEY_NOT_FOUND;
}


int conf_parse_file(const char* filename)
{
  FILE *f;
  char keyword[64], value[64];
  char line[256];
  int err;
  
  
  err=0;
  
  f = fopen(filename, "r");
  if (!f) { log_perror(LOG_NOTICE, "%s:", filename); return -1;}

  while ( ! feof(f))
  {
    if (! fgets(line, 256, f)) continue;
    if (sscanf(line, "%64s %64s", keyword, value) != 2) continue;
    
    if (keyword[0]=='#') continue;
                 
    switch (lookup_key(keyword))
    {
      case C_NETMASK:
        resolve_addr (value, &g_netmask);
        break;
        
      case C_NAMESERV:
        resolve_addr(value, &g_nameserv);
        break;
        
      case C_GW_ADDR:
        resolve_addr(value, &g_gw_addr);
        break;
        
      case C_BROADCAST:
        resolve_addr(value, &g_broadcast);
        break;
        
      case C_IFNAME:
        g_ifname = strdup(value);
        break;
        
      case C_LOGFILE:
        g_logfile = strdup(value);
        break;
        
      case C_BOOTFILE:
        g_bootfile = strdup(value);
        break;

      default:
        log_msg(LOG_ERR, "%s: unrecognized keyword.");
        err = -1;
        break;
    
    }    
  }  
  
  fclose(f);
  return err;
}