parse_cseq.c

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/* 
 * $Id$ 
 *
 * 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
 *
 * 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
 * 
 * History:
 * --------
 * 2003-02-28 scratchpad compatibility abandoned (jiri)
 * 2003-01-22 zero-termination in CSeq eliminated (jiri)
 */

#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"

/*BUGGY*/
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) {
                        LOG(L_ERR, "ERROR: parse_cseq: "
                                                "method terminated unexpectedly\n");
                        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;
        cb->method.len=t-cb->method.s;

        /* Cache method id */
        if (parse_method_name(&cb->method, &cb->method_id)!=0){
                LOG(L_ERR, "Cannot parse method string\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) {
                LOG(L_ERR, "ERROR: parse_cseq: 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;
        }
        LOG(L_ERR, "ERROR: CSeq EoL expected\n");

error:
        LOG(L_ERR, "ERROR: parse_cseq: bad cseq\n");
        return t;
}


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