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/*
Copyright (C) 2010 Srivats P.
This file is part of "Ostinato"
This 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 3 of the License, or
(at your option) any later version.
This program 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, see <http://www.gnu.org/licenses/>
*/
#ifndef _IP_UTILS_H
#define _IP_UTILS_H
#include "uint128.h"
#include <QHostAddress>
namespace ipUtils {
enum AddrMode {
kFixed = 0,
kIncrement = 1,
kDecrement = 2,
kRandom = 3
};
quint32 inline ipAddress(quint32 baseIp, int prefix, AddrMode mode, int count,
int index)
{
int u;
quint32 mask = ((1<<prefix) - 1) << (32 - prefix);
quint32 subnet, host, ip;
switch(mode)
{
case kFixed:
ip = baseIp;
break;
case kIncrement:
u = index % count;
subnet = baseIp & mask;
host = (((baseIp & ~mask) + u) &
~mask);
ip = subnet | host;
break;
case kDecrement:
u = index % count;
subnet = baseIp & mask;
host = (((baseIp & ~mask) - u) &
~mask);
ip = subnet | host;
break;
case kRandom:
subnet = baseIp & mask;
host = (qrand() & ~mask);
ip = subnet | host;
break;
default:
ip = 0;
qWarning("Unhandled mode = %d", mode);
}
return ip;
}
void inline ipAddress(quint64 baseIpHi, quint64 baseIpLo, int prefix,
AddrMode mode, int count, int index, quint64 &ipHi, quint64 &ipLo)
{
int u, p, q;
quint64 maskHi = 0, maskLo = 0;
quint64 prefixHi, prefixLo;
quint64 hostHi = 0, hostLo = 0;
switch(mode)
{
case kFixed:
ipHi = baseIpHi;
ipLo = baseIpLo;
break;
case kIncrement:
case kDecrement:
case kRandom:
u = index % count;
if (prefix > 64) {
p = 64;
q = prefix - 64;
} else {
p = prefix;
q = 0;
}
if (p > 0)
maskHi = ~((quint64(1) << p) - 1);
if (q > 0)
maskLo = ~((quint64(1) << q) - 1);
prefixHi = baseIpHi & maskHi;
prefixLo = baseIpLo & maskLo;
if (mode == kIncrement) {
hostHi = ((baseIpHi & ~maskHi) + 0) & ~maskHi;
hostLo = ((baseIpLo & ~maskLo) + u) & ~maskLo;
}
else if (mode == kDecrement) {
hostHi = ((baseIpHi & ~maskHi) - 0) & ~maskHi;
hostLo = ((baseIpLo & ~maskLo) - u) & ~maskLo;
}
else if (mode==kRandom) {
hostHi = qrand() & ~maskHi;
hostLo = qrand() & ~maskLo;
}
ipHi = prefixHi | hostHi;
ipLo = prefixLo | hostLo;
break;
default:
qWarning("Unhandled mode = %d", mode);
}
}
UInt128 inline ip6StringToUInt128(QString ip6Str)
{
Q_IPV6ADDR addr = QHostAddress(ip6Str).toIPv6Address();
quint64 hi, lo;
hi = (quint64(addr[0]) << 56)
| (quint64(addr[1]) << 48)
| (quint64(addr[2]) << 40)
| (quint64(addr[3]) << 32)
| (quint64(addr[4]) << 24)
| (quint64(addr[5]) << 16)
| (quint64(addr[6]) << 8)
| (quint64(addr[7]) << 0);
lo = (quint64(addr[ 8]) << 56)
| (quint64(addr[ 9]) << 48)
| (quint64(addr[10]) << 40)
| (quint64(addr[11]) << 32)
| (quint64(addr[12]) << 24)
| (quint64(addr[13]) << 16)
| (quint64(addr[14]) << 8)
| (quint64(addr[15]) << 0);
return UInt128(hi, lo);
}
} // namespace ipUtils
#endif
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