name_alias.h
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 /*
  * $Id$
  *
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  *
  * Copyright (C) 2001-2003 Fhg Fokus
  *
  * 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 "str.h"
 #include "dprint.h"
 
 
 
 struct host_alias{
 	str alias;
 	struct host_alias* next;
 };
 
 
 extern struct host_alias* aliases;
 
 
 
 /* returns 1 if  name is in the alias list*/
 static inline int grep_aliases(char* name, int len)
 {
 	struct  host_alias* a;
 	
 	for(a=aliases;a;a=a->next)
 		if ((a->alias.len==len) && (strncasecmp(a->alias.s, name, len)==0))
 			return 1;
 	return 0;
 }
 
 
 
 /* adds an alias to the list (only if it isn't already there)
  * returns 1 if a new alias was added, 0 if the alias was already on the list
  * and  -1 on error */
 static inline int add_alias(char* name, int len)
 {
 	struct host_alias* a;
 	
 	if (grep_aliases(name,len)) return 0;
 	a=0;
 	a=(struct host_alias*)malloc(sizeof(struct host_alias));
 	if(a==0) goto error;
 	a->alias.s=(char*)malloc(len+1);
 	if (a->alias.s==0) goto error;
 	a->alias.len=len;
 	memcpy(a->alias.s, name, len);
 	a->alias.s[len]=0; /* null terminate for easier printing*/
 	a->next=aliases;
 	aliases=a;
 	return 1;
 error:
 	LOG(L_ERR, "ERROR: add_alias: memory allocation error\n");
 	if (a) free(a);
 	return -1;
 }