parse_rr.h

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/*
 * $Id$
 *
 * Route & Record-Route Parser
 *
 * 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:
 *    info@iptel.org
 *
 * 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
 */

#ifndef PARSE_RR_H
#define PARSE_RR_H

#include <stdio.h>
#include "msg_parser.h"
#include "parse_nameaddr.h"
#include "parse_param.h"
#include "hf.h"


typedef struct rr {
        name_addr_t nameaddr; 
        param_t* r2;          
        param_t* params;      
        int len;              
        struct rr* next;      
} rr_t;


/*
 * Parse Route & Record-Route header fields
 */
int parse_rr(struct hdr_field* _r);

/*
 * Parse the body of Route & Record-Route headers
 */
int parse_rr_body(char *buf, int len, rr_t **head);

/*
 * Free list of rr
 * _c is head of the list
 */
void free_rr(rr_t** _r);


/*
 * Free list of rr
 * _c is head of the list
 */
void shm_free_rr(rr_t** _r);


/*
 * Print list of rrs, just for debugging
 */
void print_rr(FILE* _o, rr_t* _r);


/*
 * Duplicate a single rr_t structure using pkg_malloc
 */
int duplicate_rr(rr_t** _new, rr_t* _r);


/*
 * Duplicate a single rr_t structure using pkg_malloc
 */
int shm_duplicate_rr(rr_t** _new, rr_t* _r);

/*
 * Find out if a URI contains r2 parameter which indicates
 * that we put 2 record routes
 */
static inline int is_2rr(str* _params)
{
        str s;
        int i, state = 0;

        if (_params->len == 0) return 0;
        s = *_params;

        for(i = 0; i < s.len; i++) {
                switch(state) {
                case 0:
                        switch(s.s[i]) {
                        case ' ':
                        case '\r':
                        case '\n':
                        case '\t':           break;
                        case 'r':
                        case 'R': state = 1; break;
                        default:  state = 4; break;
                        }
                        break;

                case 1:
                        switch(s.s[i]) {
                        case '2': state = 2; break;
                        default:  state = 4; break;
                        }
                        break;

                case 2:
                        switch(s.s[i]) {
                        case ';':  return 1;
                        case '=':  return 1;
                        case ' ':
                        case '\r':
                        case '\n':
                        case '\t': state = 3; break;
                        default:   state = 4; break;
                        }
                        break;

                case 3:
                        switch(s.s[i]) {
                        case ';':  return 1;
                        case '=':  return 1;
                        case ' ':
                        case '\r':
                        case '\n':
                        case '\t': break;
                        default:   state = 4; break;
                        }
                        break;

                case 4:
                        switch(s.s[i]) {
                        case '\"': state = 5; break;
                        case ';':  state = 0; break;
                        default:              break;
                        }
                        break;

                case 5:
                        switch(s.s[i]) {
                        case '\\': state = 6; break;
                        case '\"': state = 4; break;
                        default:              break;
                        }
                        break;

                case 6: state = 5; break;
                }
        }

        if ((state == 2) || (state == 3)) return 1;
        else return 0;
}

int print_rr_body(struct hdr_field *iroute, str *oroute, int order,
                                  unsigned int * nb_recs);

int get_path_dst_uri(str *_p, str *_dst);

#endif /* PARSE_RR_H */