proxy.h

/*
 * $Id$
 *
 *
 * 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:
 *    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
 */
 /*
  * History:
  * -------
  *  2003-02-13  added proto to struct proxy_l & to *_proxy functions (andrei)
  */


#ifndef proxy_h
#define proxy_h

#include <netdb.h>
#include "ip_addr.h"
#include "str.h"
#include "config.h"

struct proxy_l{
        struct proxy_l* next;
        str name; /* original name */
        struct hostent host; /* addresses */
        unsigned short port;
        unsigned short reserved; /*align*/
        int proto;
        
        /* socket ? */

        int addr_idx;   /* crt. addr. idx. */
        int ok; /* 0 on error */
        /*statistics*/
        int tx;
        int tx_bytes;
        int errors;
};

extern struct proxy_l* proxies;

struct proxy_l* add_proxy(str* name, unsigned short port, int proto);
struct proxy_l* mk_proxy(str* name, unsigned short port, int proto);
struct proxy_l* mk_shm_proxy(str* name, unsigned short port, int proto);
struct proxy_l* mk_proxy_from_ip(struct ip_addr* ip, unsigned short port,
                                                                        int proto);
void free_proxy(struct proxy_l* p);
void free_shm_proxy(struct proxy_l* p);



/* returns 0 on success, -1 on error (unknown af/bug) */
inline static int proxy2su(union sockaddr_union* su, struct proxy_l* p)
{
        /* if error try next ip address if possible */
        if (p->ok==0){
                if (p->host.h_addr_list[p->addr_idx+1])
                        p->addr_idx++;
                else p->addr_idx=0;
                p->ok=1;
        }
        
        return hostent2su(su, &p->host, p->addr_idx,
                                (p->port)?p->port:((p->proto==PROTO_TLS)?SIPS_PORT:SIP_PORT) );
}



/* mark as proxy either as ok (err>=0) or as bad (err<0) */
inline static void proxy_mark(struct proxy_l* p, int err)
{
        if (err<0){
                p->errors++;
                p->ok=0;
        }else{
                p->tx++;
        }
}



#endif