/*

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

 *

 */

/*! \file

 * \brief Parser :: Cseq header field handling

 *

 * \ingroup parser

 */

#include "../comp_defs.h"

#include "parse_cseq.h"

#include "parser_f.h" /* eat_space_end and so on */

#include "../dprint.h"

#include "parse_def.h"

#include "parse_methods.h"

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

/* parse cseq header */

char *parse_cseq(

    char *const buf, const char *const end, struct cseq_body *const cb)

{

  char *t, *m, *m_end;

  cb->error = PARSE_ERROR;

  t = buf;

  cb->number.s = t;

  t = eat_token_end(t, end);

  if(t >= end)

    goto error;

  cb->number.len = t - cb->number.s;

  m = eat_space_end(t, end);

  m_end = eat_token_end(m, end);

  if(m_end >= end) {

    LM_ERR("method terminated unexpectedly\n");

    goto error;

  }

  if(m_end == m) {

    /* null method*/

    LM_ERR("no method found\n");

    goto error;

  }

  cb->method.s = m;

  t = m_end;

  cb->method.len = t - cb->method.s;

  /* Cache method id */

  if(parse_method_name(&cb->method, &cb->method_id) != 0) {

    LM_ERR("Cannot parse method string\n");

    goto error;

  }

  /* there may be trailing LWS */

  t = eat_lws_end(t, end);

  /*check if the header ends here*/

  if(t >= end) {

    LM_ERR("strange EoHF\n");

    goto error;

  }

  if(*t == '\r' && t + 1 < end && *(t + 1) == '\n') {

    cb->error = PARSE_OK;

    return t + 2;

  }

  if(*t == '\n') {

    cb->error = PARSE_OK;

    return t + 1;

  }

  LM_ERR("CSeq EoL expected\n");

error:

  LM_ERR("bad cseq\n");

  return t;

}

void free_cseq(struct cseq_body *const cb)

{

  pkg_free(cb);

}