registrar/common.c

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/*
 * $Id: common.c 4892 2008-09-11 17:44:28Z henningw $
 *
 * Common stuff
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio 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
 *
 * Kamailio 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
 * 
 * History
 * ------
 * 2003-02-14 un-escaping added (janakj)
 * 2006-09-19 AOR may be provided via an AVP instead of being fetched
 *            from URI (bogdan)
*/

/*!
 * \file
 * \brief SIP registrar module
 * \ingroup registrar
 */

#include <string.h> 
#include "../../dprint.h"
#include "../../parser/parse_uri.h"
#include "rerrno.h"
#include "reg_mod.h"
#include "common.h"


#define MAX_AOR_LEN 256

/*! \brief
 * Extract Address of Record
 */
int extract_aor(str* _uri, str* _a)
{
   static char aor_buf[MAX_AOR_LEN];
   memset(aor_buf, 0, MAX_AOR_LEN);

   str tmp;
   struct sip_uri puri;
   int user_len;
   int_str avp_val;
   struct usr_avp *avp;
   str *uri;

   if (aor_avp_name.n!=0) {
      avp = search_first_avp( aor_avp_type, aor_avp_name, &avp_val, 0);
      if (avp && is_avp_str_val(avp)) {
         uri = &avp_val.s;
      } else {
         uri = _uri;
      }
   } else {
      uri=_uri;
   }

   if (parse_uri(uri->s, uri->len, &puri) < 0) {
      rerrno = R_AOR_PARSE;
      LM_ERR("failed to parse Address of Record\n");
      return -1;
   }
   
   if ( (puri.user.len + puri.host.len + 1) > MAX_AOR_LEN
   || puri.user.len > USERNAME_MAX_SIZE
   ||  puri.host.len > DOMAIN_MAX_SIZE ) {
      rerrno = R_AOR_LEN;
      LM_ERR("Address Of Record too long\n");
      return -2;
   }

   _a->s = aor_buf;
   _a->len = puri.user.len;

   if (un_escape(&puri.user, _a) < 0) {
      rerrno = R_UNESCAPE;
      LM_ERR("failed to unescape username\n");
      return -3;
   }

   user_len = _a->len;

   if (reg_use_domain) {
      if (user_len)
         aor_buf[_a->len++] = '@';
      /* strip prefix (if defined) */
      if (realm_prefix.len && realm_prefix.len<puri.host.len &&
      (memcmp(realm_prefix.s, puri.host.s, realm_prefix.len)==0) ) {
         memcpy(aor_buf + _a->len, puri.host.s + realm_prefix.len,
               puri.host.len - realm_prefix.len);
         _a->len += puri.host.len - realm_prefix.len;
      } else {
         memcpy(aor_buf + _a->len, puri.host.s, puri.host.len);
         _a->len += puri.host.len;
      }
   }

   if (case_sensitive && user_len) {
      tmp.s = _a->s + user_len + 1;
      tmp.len = _a->s + _a->len - tmp.s;
      strlower(&tmp);
   } else {
      strlower(_a);
   }

   return 0;
}