ip_tree.h

用来作为linux中SIP SERVER,完成VOIP网络电话中服务器的功能

/* 
 * $Id: ip_tree.h,v 1.8 2004/11/05 14:21:00 bogdan Exp $
 *
 *
 * 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:
 *    [e-mail]
 *
 * 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:
 * --------
 *  2004-07-28  s/lock_set_t/gen_lock_set_t/ because of a type conflict
 *              on darwin (andrei)
 *  2004-11-05: adaptiv init lock (bogdan)
 */

#ifndef _IP_TREE_H
#define _IP_TREE_H


#include <stdio.h>
#include "../../locking.h"
#include "timer.h"


#define NEW_NODE   (1<<0)
#define LEAF_NODE  (1<<1)
#define RED_NODE   (1<<2)
#define NO_UPDATE  (1<<3)

#define MAX_IP_BRANCHES 256

#define PREV_POS 0
#define CURR_POS 1


struct ip_node
{
	unsigned int      expires;
	unsigned short    leaf_hits[2];
	unsigned short    hits[2];
	unsigned char     byte;
	unsigned char     branch;
	struct list_link  timer_ll;
	struct ip_node    *prev;
	struct ip_node    *next;
	struct ip_node    *kids;
};


struct ip_tree
{
	struct entry {
		struct ip_node *node;
		int            lock_idx;
	} entries[MAX_IP_BRANCHES];
	unsigned short   max_hits;
	gen_lock_set_t  *entry_lock_set;
};


#define ll2ipnode(ptr) \
	((struct ip_node*)((char *)(ptr)-\
		(unsigned long)(&((struct ip_node*)0)->timer_ll)))


int   init_ip_tree(int);
void  destroy_ip_tree();
struct ip_node* mark_node( unsigned char *ip, int ip_len,
		struct ip_node **father, unsigned char *flag);
void  remove_node(struct ip_node *node);

void print_tree( FILE *f);

void lock_tree_branch(unsigned char b);
void unlock_tree_branch(unsigned char b);
struct ip_node* get_tree_branch(unsigned char b);



#endif