/*  This file is a part of JRTPLIB  Copyright (c) 1999-2004 Jori Liesenborgs  Contact: jori@lumumba.luc.ac.be  This library (JRTPLIB) was partially developed for my thesis at the  School for Knowledge Technology (Belgium/The Netherlands)  Permission is hereby granted, free of charge, to any person obtaining a  copy of this software and associated documentation files (the "Software"),  to deal in the Software without restriction, including without limitation  the rights to use, copy, modify, merge, publish, distribute, sublicense,  and/or sell copies of the Software, and to permit persons to whom the  Software is furnished to do so, subject to the following conditions:  The above copyright notice and this permission notice shall be included  in all copies or substantial portions of the Software.  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS  IN THE SOFTWARE.*/#include "rtpiptable.h"#include "rtperror.h"#include <stdlib.h>/* Definition of table member struct */struct RTPIPTableMember{	unsigned long ip;	bool allports;	int port;	RTPIPTableMember *next;};/* Class implementation */RTPIPTable::RTPIPTable(){	int i;	for (i = 0 ; i < RTP_IPTABLE_HASHSIZE ; i++)		table[i] = NULL;}RTPIPTable::~RTPIPTable(){	Clear();}int RTPIPTable::Add(unsigned long ip,bool allports,int port){	int index;	RTPIPTableMember *tmp,*tmpprev,*tmpnext;	bool done;	if (allports)		port = 0;	else	{		if (port <= 0)			return ERR_RTP_ILLEGALPORT;	}	index = (int)(ip%((unsigned long)RTP_IPTABLE_HASHSIZE));	if (table[index] == NULL)	{		tmp = new RTPIPTableMember;		if (tmp == NULL)			return ERR_RTP_OUTOFMEM;		table[index] = tmp;		tmp->next = NULL;	}	else // already entries in the hashtable	{		// sort on ip		tmpprev = NULL;		tmp = table[index];		done = false;		while (!done)		{			if (tmp == NULL)				done = true;			else			{				if (ip > tmp->ip)				{					tmpprev = tmp;					tmp = tmp->next;				}				else					done = true;			}		}		if (tmp != NULL)		{			if (tmp->ip == ip) // same ip address			{				// sort on portnum								done = false;					while (!done)				{					if (tmp == NULL)						done = true;					else					{						if (port > tmp->port && ip == tmp->ip)						{							tmpprev = tmp;							tmp = tmp->next;						}						else							done = true;					}				}				if (tmp != NULL && tmp->port == port && tmp->allports == allports && tmp->ip == ip)					return ERR_RTP_IPTABLEENTRYEXISTS;			}		}		if (tmp == NULL)		{			tmp = new RTPIPTableMember;			if (tmp == NULL)				return ERR_RTP_OUTOFMEM;			tmp->next = NULL;			tmpprev->next = tmp;		}		else		{			if (tmpprev == NULL)			{				tmp = new RTPIPTableMember;				if (tmp == NULL)					return ERR_RTP_OUTOFMEM;				tmp->next = table[index];				table[index] = tmp;			}			else			{				tmpnext = tmp;				tmp = new RTPIPTableMember;				if (tmp == NULL)					return ERR_RTP_OUTOFMEM;				tmp->next = tmpnext;				tmpprev->next = tmp;			}		}	}	tmp->allports = allports;	tmp->ip = ip;	tmp->port = port;	return 0;}int RTPIPTable::Delete(unsigned long ip,bool allports,int port){	int index;	RTPIPTableMember *tmp,*tmpprev,*tmpnext;	bool done;	if (allports)		port = 0;	else	{		if (port <= 0)			return ERR_RTP_ILLEGALPORT;	}	index = (int)(ip%((unsigned long)RTP_IPTABLE_HASHSIZE));	if (table[index] == NULL)		return ERR_RTP_IPTABLEENTRYDOESNTEXIST;	/* Search for the right IP */		tmpprev = NULL;	tmp = table[index];	done = false;	while (!done)	{		if (tmp == NULL)			done = true;		else		{			if (ip > tmp->ip)			{				tmpprev = tmp;				tmp = tmp->next;			}			else				done = true;		}	}	if (tmp == NULL)		return ERR_RTP_IPTABLEENTRYDOESNTEXIST;	if (tmp->ip != ip)		return ERR_RTP_IPTABLEENTRYDOESNTEXIST;		/* search for the right port */		done = false;		while (!done)	{		if (tmp == NULL)			done = true;		else		{			if (port > tmp->port && ip == tmp->ip)			{				tmpprev = tmp;				tmp = tmp->next;			}			else				done = true;		}	}	if (tmp == NULL)		return ERR_RTP_IPTABLEENTRYDOESNTEXIST;	if ( !(tmp->port == port && tmp->allports == allports && tmp->ip == ip))		return ERR_RTP_IPTABLEENTRYDOESNTEXIST;	tmpnext = tmp->next;	if (tmpprev == NULL)		table[index] = tmpnext;	else		tmpprev->next = tmpnext;	delete tmp;	return 0;}bool RTPIPTable::Exists(unsigned long ip,bool allports,int port){	int index;	RTPIPTableMember *tmp;	bool done;	if (allports)		port = 0;	else	{		if (port <= 0)			return false;	}	index = (int)(ip%((unsigned long)RTP_IPTABLE_HASHSIZE));	if (table[index] == NULL)		return false;	/* Search for the right IP */		tmp = table[index];	done = false;	while (!done)	{		if (tmp == NULL)			done = true;		else		{			if (ip > tmp->ip)				tmp = tmp->next;			else				done = true;		}	}	if (tmp == NULL)		return false;	if (tmp->ip != ip)		return false;		/* search for the right port */		done = false;		while (!done)	{		if (tmp == NULL)			done = true;		else		{			if (port > tmp->port && ip == tmp->ip)				tmp = tmp->next;			else				done = true;		}	}	if (tmp == NULL)		return false;	if ( !(tmp->port == port && tmp->allports == allports && tmp->ip == ip))		return false;	return true;}void RTPIPTable::Clear(){	int i;	RTPIPTableMember *tmp,*tmp2;	for (i = 0 ; i < RTP_IPTABLE_HASHSIZE ; i++)	{		tmp = table[i];		while (tmp != NULL)		{			tmp2 = tmp->next;			delete tmp;			tmp = tmp2;		}		table[i] = NULL;	}}