kamailio/parser/parse_cseq.c

/* 
 * $Id$ 
 *
 * Copyright (C) 2001-2003 Fhg Fokus
 *
 * This file is part of ser, a free SIP server.
 *
 * ser 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
 *
 * For a license to use the ser software under conditions
 * other than those described here, or to purchase support for this
 * software, please contact iptel.org by e-mail at the following addresses:
 *    [email protected]
 *
 * ser 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
 */


#include "parse_cseq.h"
#include "parser_f.h"  /* eat_space_end and so on */
#include "../dprint.h"
#include "parse_def.h"
#include "../mem/mem.h"

/*
 * Parse CSeq header field
 */

/*BUGGY*/
char* parse_cseq(char *buf, char* end, struct cseq_body* cb)
{
	char *t, *m, *m_end;
	char c;
	
	cb->error=PARSE_ERROR;
	t=eat_space_end(buf, end);
	if (t>=end) goto error;
	
	cb->number.s=t;
	t=eat_token_end(t, end);
	if (t>=end) goto error;
	m=eat_space_end(t, end);
	m_end=eat_token_end(m, end);
	*t=0; /*null terminate it*/
	cb->number.len=t-cb->number.s;

	if (m_end>=end) goto error;
	if (m_end==m){
		/* null method*/
		LOG(L_ERR,  "ERROR:parse_cseq: no method found\n");
		goto error;
	}
	cb->method.s=m;
	t=m_end;
	c=*t;
	*t=0; /*null terminate it*/
	cb->method.len=t-cb->method.s;
	t++;
	/*check if the header ends here*/
	if (c=='\n') goto check_continue;
	do{
		for (;(t<end)&&((*t==' ')||(*t=='\t')||(*t=='\r'));t++);
		if (t>=end) goto error;
		if (*t!='\n'){
			LOG(L_ERR, "ERROR:parse_cseq: unexpected char <%c> at end of"
					" cseq\n", *t);
			goto error;
		}
		t++;
check_continue:
		;
	}while( (t<end) && ((*t==' ')||(*t=='\t')) );

	cb->error=PARSE_OK;
	return t;
error:
	LOG(L_ERR, "ERROR: parse_cseq: bad cseq\n");
	return t;
}


void free_cseq(struct cseq_body* cb)
{
	pkg_free(cb);
}