/*

 * Copyright (C) 2001-2003 FhG Fokus

 *

 * 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:

 * --------

 * 2005-07-12 missing TAG is reported as error (bogdan)

 */

#include "parse_from.h"

#include "parse_to.h"

#include "parse_uri.h"

#include <stdlib.h>

#include <string.h>

#include "../errinfo.h"

#include "../dprint.h"

#include "../ut.h"

#include "../mem/mem.h"

#include "msg_parser.h"

/*

 * This method is used to parse the from header. It was decided not to parse

 * anything in core that is not *needed* so this method gets called by

 * rad_acc module and any other modules that needs the FROM header.

 *

 * params: msg : sip msg

 * returns =0 on success,

 *         <0 on failure.

 */

int parse_from_header( struct sip_msg *msg)

{

  struct to_body* from_b;

  if ( !msg->from && ( parse_headers(msg,HDR_FROM_F,0)==-1 || !msg->from)) {

    LM_ERR("bad msg or missing FROM header\n");

    goto error;

  }

  /* maybe the header is already parsed! */

  if (msg->from->parsed)

    return 0;

  /* bad luck! :-( - we have to parse it */

  /* first, get some memory */

  from_b = pkg_malloc(sizeof(struct to_body));

  if (from_b == 0) {

    LM_ERR("out of pkg_memory\n");

    goto error;

  }

  /* now parse it!! */

  memset(from_b, 0, sizeof(struct to_body));

  parse_to(msg->from->body.s,msg->from->body.s+msg->from->body.len+1,from_b);

  if (from_b->error == PARSE_ERROR) {

    LM_ERR("bad from header\n");

    pkg_free(from_b);

    set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,

      "error parsing From header");

    set_err_reply(400, "bad header");

    goto error;

  }

  /* REGISTER doesn't have a from tag :( -bogdan

  if (from_b->tag_value.len==0 || from_b->tag_value.s==0) {

    LM_ERR("missing TAG value\n");

    free_to(from_b);

    goto error;

  }

  */

  msg->from->parsed = from_b;

  return 0;

error:

  return -1;

}

/**

 *

 */

struct sip_uri *parse_from_uri(struct sip_msg *msg)

{

  struct to_body *tb = NULL;

  if(msg==NULL)

    return NULL;

  if(parse_from_header(msg)<0)

  {

    LM_ERR("cannot parse FROM header\n");

    return NULL;

  }

  if(msg->from==NULL || get_from(msg)==NULL)

    return NULL;

  tb = get_from(msg);

  if(tb->parsed_uri.user.s!=NULL || tb->parsed_uri.host.s!=NULL)

    return &tb->parsed_uri;

  if (parse_uri(tb->uri.s, tb->uri.len , &tb->parsed_uri)<0)

  {

    LM_ERR("failed to parse From uri\n");

    memset(&tb->parsed_uri, 0, sizeof(struct sip_uri));

    set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM, "error parsing From uri");

    set_err_reply(400, "bad From uri");

    return NULL;

  }

  return &tb->parsed_uri;

}