/*

 * 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:

 * --------

 * 2003-02-28 scratchpad compatibility abandoned (jiri)

 * 2003-01-22 zero-termination in CSeq eliminated (jiri)

 */

#include "../dprint.h"

#include "parse_cseq.h"

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

#include "parse_def.h"

#include "parse_methods.h"

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

/*

 * Parse CSeq header field

 */

char* parse_cseq(char *buf, char* end, struct cseq_body* 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 the method id */

  if(parse_method(cb->method.s, t, (unsigned int*)&cb->method_id)==0)

  {

    LM_ERR("cannot parse the method\n");

    goto error;

  }

  /* there may be trailing LWS

   * (it was not my idea to put it in SIP; -jiri )

   */

  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("expecting CSeq EoL\n");

error:

  LM_ERR("bad cseq\n");

  return t;

}

void free_cseq(struct cseq_body* cb)

{

  pkg_free(cb);

}