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117 lines
5.0 KiB
117 lines
5.0 KiB
/***************************************************************************
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kaddressvalidator.h - description
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-------------------
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begin : Wed Jan 22 2003
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copyright : (C) 2003 by Juan Luis Baptiste
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email : jbaptiste@merlinux.org
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***************************************************************************/
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/***************************************************************************
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* *
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* This program 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 *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef KADDRESSVALIDATOR_H
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#define KADDRESSVALIDATOR_H
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/*
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Class for validating IP address and netmasks, and to calculate network and broadcast values.
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The functions to do the last two things where taken from the code of ipcalc.c, made by
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Erik Troan <ewt@redhat.com> and Preston Brown <pbrown@redhat.com> from Red Hat Inc.
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*/
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/*!
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\def IPBITS
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\brief the number of bits in an IP address.
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*/
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#define IPBITS (sizeof(TQ_UINT32) * 8)
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/*!
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\def IPBYTES
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\brief the number of bytes in an IP address.
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*/
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#define IPBYTES (sizeof(TQ_UINT32))
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <tqstring.h>
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/**Class that has simple methods for validating IP addresses, netmasks, calculating
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broadcast and network addresses.
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*@author Juan Luis Baptiste
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*/
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class KAddressValidator {
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public:
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KAddressValidator();
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~KAddressValidator();
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/** Validates if the address written by the user is a valid one. Return true if it is and false if not. */
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static bool isValidIPAddress(TQString addr);
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/** Validates if the Netmask written by the user is a valid one. Return true if it is and false if not. */
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static bool isNetmaskValid(TQString addr);
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/** Validates if the Network written by the user is a valid one. Return true if it is and false if not. */
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static bool isNetworkValid(const TQString &addr);
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/** Validates if the Broadcast written by the user is a valid one. Return true if it is and false if not. */
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static bool isBroadcastValid(TQString addr);
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/** Is a wrapper function to calc_network that receives the IP address and netsmask as TQString and
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returns the network value also as a TQString, or NULL if it couldn't be calculated. */
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static TQString calculateNetwork(TQString addr,TQString netmask);
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/** Is a wrapper function to calc_broadcast that receives the IP address and netsmask as TQString and
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returns the broadcast value also as a TQString, or NULL if it couldn't be calculated. */
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static TQString calculateBroadcast(TQString addr, TQString netmask);
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private: // Private methods
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/** \fn unsigned long int calc_broadcast(unsigned long int addr, int prefix)
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\brief calculate broadcast address given an IP address and a prefix length.
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\param addr an IP address in network byte order.
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\param prefix a prefix length.
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\return the calculated broadcast address for the network, in network byte
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order. */
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static unsigned long int calc_broadcast(unsigned long int addr, int prefix);
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/** \fn unsigned long int calc_network(unsigned long int addr, int prefix)
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\brief calculates the network address for a specified address and prefix.
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\param addr an IP address, in network byte order
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\param prefix the network prefix
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\return the base address of the network that addr is associated with, in
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network byte order. */
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static unsigned long int calc_network(unsigned long int addr, int prefix);
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/** \fn unsigned long int prefix2mask(int bits)
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\brief creates a netmask from a specified number of bits
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This function converts a prefix length to a netmask. As CIDR (classless
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internet domain internet domain routing) has taken off, more an more IP
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addresses are being specified in the format address/prefix
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(i.e. 192.168.2.3/24, with a corresponding netmask 255.255.255.0). If you
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need to see what netmask corresponds to the prefix part of the address, this
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is the function. See also \ref mask2prefix.
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\param prefix is the number of bits to create a mask for.
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\return a network mask, in network byte order.
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*/
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static unsigned long int prefix2mask(int prefix);
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/** \fn int mask2prefix(unsigned long int mask)
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\brief calculates the number of bits masked off by a netmask.
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This function calculates the significant bits in an IP address as specified by
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a netmask. See also \ref prefix2mask.
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\param mask is the netmask, specified as an unsigned long integer in network byte order.
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\return the number of significant bits. */
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static int mask2prefix(unsigned long int mask);
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};
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#endif
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