proxy.h
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 /*
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  * Copyright (C) 2001-2003 FhG Fokus
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  *
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  * This file is part of Kamailio, a free SIP server.
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  *
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  * Kamailio is free software; you can redistribute it and/or modify
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  * 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
  *
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  * Kamailio is distributed in the hope that it will be useful,
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  * 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 
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  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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  */
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 /*!
  * \file
  * \brief Kamailio core :: Proxy 
  * \ingroup core
  * \author andrei
  * Module: \ref core
  */
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 #ifndef proxy_h
 #define proxy_h
 
 #include <netdb.h>
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 #include "ip_addr.h"
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 #include "str.h"
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 #include "config.h"
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 struct proxy_l{
 	struct proxy_l* next;
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 	str name; /* original name */
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 	struct hostent host; /* addresses */
 	unsigned short port;
 	unsigned short reserved; /*align*/
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 	int proto;
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 	/* socket ? */
 
 	int addr_idx;	/* crt. addr. idx. */
 	int ok; /* 0 on error */
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 	/*statistics*/
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 	int tx;
 	int tx_bytes;
 	int errors;
 };
 
 extern struct proxy_l* proxies;
 
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 struct proxy_l* add_proxy(str* name, unsigned short port, int proto);
 struct proxy_l* mk_proxy(str* name, unsigned short port, int proto);
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 struct proxy_l* mk_shm_proxy(str* name, unsigned short port, int proto);
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 struct proxy_l* mk_proxy_from_ip(struct ip_addr* ip, unsigned short port,
 									int proto);
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 void free_proxy(struct proxy_l* p);
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 void free_shm_proxy(struct proxy_l* p);
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 /** returns 0 on success, -1 on error (unknown af/bug) */
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 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) );
 }
 
 
 
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 /** mark proxy either as ok (err>=0) or as bad (err<0) */
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 inline static void proxy_mark(struct proxy_l* p, int err)
 {
 	if (err<0){
 		p->errors++;
 		p->ok=0;
 	}else{
 		p->tx++;
 	}
 }
 
 
 
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 #endif