/*
  * $Id$
  *

  *

  * 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