/*

 * Copyright (C) 2001-2003 FhG Fokus

 * Copyright (C) 2009 Voice Sistem SRL

 *

 * This file is part of opensips, a free SIP server.

 *

 * opensips 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

 *

 * opensips 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

 *

 * History:

 * --------

 *  2009-02-02  splitted from name_alias.h (bogdan)

 *  2009-02-01  added interface to registed additional functions for checking

 *              the aliases (bogdan)

 */

#include <string.h>

#include "name_alias.h"

struct host_alias* aliases=0; /* name aliases list */

struct alias_function* alias_fcts = NULL;

/* adds an alias to the list (only if it isn't already there)

 * if port==0, the alias will match all the ports

 * if proto==0, the alias will match all the protocols

 * returns 1 if a new alias was added, 0 if a matching alias was already on

 * the list and  -1 on error */

int add_alias(char* name, int len, unsigned short port, unsigned short proto, int accept_subdomain)

{

  struct host_alias* a;

  if ((port) && (proto)){

    /* don't add if there is already an alias matching it */

    if (grep_aliases(name,len, port, proto)) return 0;

  }else{

    /* don't add if already in the list with port or proto ==0*/

    for(a=aliases;a;a=a->next)

      if ((a->alias.len==len) && (a->port==port) && (a->proto==proto) &&

          (strncasecmp(a->alias.s, name, len)==0))

        return 0;

  }

  a=(struct host_alias*)pkg_malloc(sizeof(struct host_alias));

  if(a==0) goto error;

  a->alias.s=(char*)pkg_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->port=port;

  a->proto=proto;

  a->accept_subdomain=accept_subdomain;

  a->next=aliases;

  aliases=a;

  return 1;

error:

  LM_ERR("pkg memory allocation error\n");

  if (a) pkg_free(a);

  return -1;

}

int register_alias_fct( is_alias_fct *fct )

{

  struct alias_function *af;

  af = (struct alias_function *)pkg_malloc(sizeof(struct alias_function));

  if (af==NULL) {

    LM_ERR("no more pkg mem\n");

    return -1;

  }

  af->alias_f = fct;

  af->next = alias_fcts;

  alias_fcts = af;

  return 0;

}