test/gethostbyname.c
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 /*
  * $Id$
  *
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  *
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  * Copyright (C) 2001-2003 FhG Fokus
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  *
  * This file is part of ser, a free SIP server.
  *
  * ser 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
  *
  * For a license to use the ser software under conditions
  * other than those described here, or to purchase support for this
  * software, please contact iptel.org by e-mail at the following addresses:
  *    info@iptel.org
  *
  * ser 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
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  */
 
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 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
 #include <netdb.h>
 
 
 
 
 static char* id="$Id$";
 static char* version="gethostbyname 0.1";
 static char* help_msg="\
 Usage: gethostbyname   [-hV] -n host\n\
 Options:\n\
     -n host       host name\n\
     -V            version number\n\
     -h            this help message\n\
 ";
 
 
 int main(int argc, char** argv)
 {
 	char c;
 	char* name;
 	struct hostent* he;
 	unsigned char** h;
 
 	name=0;
 	
 	opterr=0;
 	while ((c=getopt(argc, argv, "n:hV"))!=-1){
 		switch(c){
 			case 'n':
 				name=optarg;
 				break;
 			case 'V':
 				printf("version: %s\n", version);
 				printf("%s\n", id);
 				exit(0);
 				break;
 			case 'h':
 				printf("version: %s\n", version);
 				printf("%s", help_msg);
 				exit(0);
 				break;
 			case '?':
 				if (isprint(optopt))
 					fprintf(stderr, "Unknown option `-%c�\n", optopt);
 				else
 					fprintf(stderr, "Unknown character `\\x%x�\n", optopt);
 				goto error;
 			case ':':
 				fprintf(stderr, "Option `-%c� requires an argument.\n",
 						optopt);
 				goto error;
 				break;
 			default:
 				abort();
 		}
 	}
 	
 	if (name==0){
 		fprintf(stderr, "Missing domain name (-n name)\n");
 		goto error;
 	}
 	
 	he=gethostbyname(name);
 	if (he==0) printf("no answer\n");
 	else{
 		printf("h_name=%s\n", he->h_name);
 		for(h=he->h_aliases;*h;h++)
 			printf("   alias=%s\n", *h);
 		for(h=he->h_addr_list;*h;h++)
 			printf("   ip=%d.%d.%d.%d\n", (*h)[0],(*h)[1],(*h)[2],(*h)[3] );
 	}
 	printf("done\n");
 	exit(0);
 error:
 	exit(-1);
 }