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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/>
*/
#include "mac.h"
#include "framevalueattrib.h"
#include "../common/streambase.h"
#include <QRegExp>
#define uintToMacStr(num) \
QString("%1").arg(num, 6*2, BASE_HEX, QChar('0')) \
.replace(QRegExp("([0-9a-fA-F]{2}\\B)"), "\\1:").toUpper()
MacProtocol::MacProtocol(StreamBase *stream, AbstractProtocol *parent)
: AbstractProtocol(stream, parent)
{
forResolve_ = false;
}
MacProtocol::~MacProtocol()
{
}
AbstractProtocol* MacProtocol::createInstance(StreamBase *stream
, AbstractProtocol *parent)
{
return new MacProtocol(stream, parent);
}
quint32 MacProtocol::protocolNumber() const
{
return OstProto::Protocol::kMacFieldNumber;
}
void MacProtocol::protoDataCopyInto(OstProto::Protocol &protocol) const
{
protocol.MutableExtension(OstProto::mac)->CopyFrom(data);
protocol.mutable_protocol_id()->set_id(protocolNumber());
}
void MacProtocol::protoDataCopyFrom(const OstProto::Protocol &protocol)
{
if (protocol.protocol_id().id() == protocolNumber() &&
protocol.HasExtension(OstProto::mac))
data.MergeFrom(protocol.GetExtension(OstProto::mac));
}
QString MacProtocol::name() const
{
return QString("Media Access Protocol");
}
QString MacProtocol::shortName() const
{
return QString("MAC");
}
int MacProtocol::fieldCount() const
{
return mac_fieldCount;
}
AbstractProtocol::FieldFlags MacProtocol::fieldFlags(int index) const
{
AbstractProtocol::FieldFlags flags;
flags = AbstractProtocol::fieldFlags(index);
switch (index)
{
case mac_dstAddr:
case mac_srcAddr:
break;
case mac_dstMacMode:
case mac_dstMacCount:
case mac_dstMacStep:
case mac_srcMacMode:
case mac_srcMacCount:
case mac_srcMacStep:
flags &= ~FrameField;
flags |= MetaField;
break;
}
return flags;
}
QVariant MacProtocol::fieldData(int index, FieldAttrib attrib,
int streamIndex) const
{
switch (index)
{
case mac_dstAddr:
{
int u;
quint64 dstMac = 0;
switch (data.dst_mac_mode())
{
case OstProto::Mac::e_mm_fixed:
dstMac = data.dst_mac();
break;
case OstProto::Mac::e_mm_inc:
u = (streamIndex % data.dst_mac_count()) *
data.dst_mac_step();
dstMac = data.dst_mac() + u;
break;
case OstProto::Mac::e_mm_dec:
u = (streamIndex % data.dst_mac_count()) *
data.dst_mac_step();
dstMac = data.dst_mac() - u;
break;
case OstProto::Mac::e_mm_resolve:
if (forResolve_)
dstMac = 0;
else {
forResolve_ = true;
dstMac = mpStream->neighborMacAddress(streamIndex);
forResolve_ = false;
}
break;
default:
qWarning("Unhandled dstMac_mode %d", data.dst_mac_mode());
}
switch(attrib)
{
case FieldName:
return QString("Destination");
case FieldValue:
return dstMac;
case FieldTextValue:
return uintToMacStr(dstMac);
case FieldFrameValue:
{
QByteArray fv;
fv.resize(8);
qToBigEndian(dstMac, (uchar*) fv.data());
fv.remove(0, 2);
return fv;
}
default:
break;
}
break;
}
case mac_srcAddr:
{
int u;
quint64 srcMac = 0;
switch (data.src_mac_mode())
{
case OstProto::Mac::e_mm_fixed:
srcMac = data.src_mac();
break;
case OstProto::Mac::e_mm_inc:
u = (streamIndex % data.src_mac_count()) *
data.src_mac_step();
srcMac = data.src_mac() + u;
break;
case OstProto::Mac::e_mm_dec:
u = (streamIndex % data.src_mac_count()) *
data.src_mac_step();
srcMac = data.src_mac() - u;
break;
case OstProto::Mac::e_mm_resolve:
if (forResolve_)
srcMac = 0;
else {
forResolve_ = true;
srcMac = mpStream->deviceMacAddress(streamIndex);
forResolve_ = false;
}
break;
default:
qWarning("Unhandled srcMac_mode %d", data.src_mac_mode());
}
switch(attrib)
{
case FieldName:
return QString("Source");
case FieldValue:
return srcMac;
case FieldTextValue:
return uintToMacStr(srcMac);
case FieldFrameValue:
{
QByteArray fv;
fv.resize(8);
qToBigEndian(srcMac, (uchar*) fv.data());
fv.remove(0, 2);
return fv;
}
default:
break;
}
break;
}
// Meta fields
case mac_dstMacMode:
switch(attrib)
{
case FieldValue: return data.dst_mac_mode();
default: break;
}
break;
case mac_dstMacCount:
switch(attrib)
{
case FieldValue: return data.dst_mac_count();
default: break;
}
break;
case mac_dstMacStep:
switch(attrib)
{
case FieldValue: return data.dst_mac_step();
default: break;
}
break;
case mac_srcMacMode:
switch(attrib)
{
case FieldValue: return data.src_mac_mode();
default: break;
}
break;
case mac_srcMacCount:
switch(attrib)
{
case FieldValue: return data.src_mac_count();
default: break;
}
break;
case mac_srcMacStep:
switch(attrib)
{
case FieldValue: return data.src_mac_step();
default: break;
}
break;
default:
break;
}
return AbstractProtocol::fieldData(index, attrib, streamIndex);
}
bool MacProtocol::setFieldData(int index, const QVariant &value,
FieldAttrib attrib)
{
bool isOk = false;
if (attrib != FieldValue)
goto _exit;
switch (index)
{
case mac_dstAddr:
{
quint64 mac = value.toULongLong(&isOk);
if (isOk)
data.set_dst_mac(mac);
break;
}
case mac_srcAddr:
{
quint64 mac = value.toULongLong(&isOk);
if (isOk)
data.set_src_mac(mac);
break;
}
// Meta-Fields
case mac_dstMacMode:
{
uint mode = value.toUInt(&isOk);
if (isOk && data.MacAddrMode_IsValid(mode))
data.set_dst_mac_mode((OstProto::Mac::MacAddrMode) mode);
else
isOk = false;
break;
}
case mac_dstMacCount:
{
uint count = value.toUInt(&isOk);
if (isOk)
data.set_dst_mac_count(count);
break;
}
case mac_dstMacStep:
{
uint step = value.toUInt(&isOk);
if (isOk)
data.set_dst_mac_step(step);
break;
}
case mac_srcMacMode:
{
uint mode = value.toUInt(&isOk);
if (isOk && data.MacAddrMode_IsValid(mode))
data.set_src_mac_mode((OstProto::Mac::MacAddrMode) mode);
else
isOk = false;
break;
}
case mac_srcMacCount:
{
uint count = value.toUInt(&isOk);
if (isOk)
data.set_src_mac_count(count);
break;
}
case mac_srcMacStep:
{
uint step = value.toUInt(&isOk);
if (isOk)
data.set_src_mac_step(step);
break;
}
default:
qFatal("%s: unimplemented case %d in switch", __PRETTY_FUNCTION__,
index);
break;
}
_exit:
return isOk;
}
int MacProtocol::protocolFrameVariableCount() const
{
int count = AbstractProtocol::protocolFrameVariableCount();
switch (data.dst_mac_mode()) {
case OstProto::Mac::e_mm_inc:
case OstProto::Mac::e_mm_dec:
count = AbstractProtocol::lcm(count, data.dst_mac_count());
break;
default:
break;
}
switch (data.src_mac_mode()) {
case OstProto::Mac::e_mm_inc:
case OstProto::Mac::e_mm_dec:
count = AbstractProtocol::lcm(count, data.src_mac_count());
break;
default:
break;
}
return count;
}
QByteArray MacProtocol::protocolFrameValue(int streamIndex, bool /*forCksum*/,
FrameValueAttrib *attrib) const
{
QByteArray ba;
ba.resize(12);
quint64 dstMac = fieldData(mac_dstAddr, FieldValue, streamIndex)
.toULongLong();
quint64 srcMac = fieldData(mac_srcAddr, FieldValue, streamIndex)
.toULongLong();
char *p = ba.data();
*(quint32*)(p ) = qToBigEndian(quint32(dstMac >> 16));
*(quint16*)(p + 4) = qToBigEndian(quint16(dstMac & 0xffff));
*(quint32*)(p + 6) = qToBigEndian(quint32(srcMac >> 16));
*(quint16*)(p + 10) = qToBigEndian(quint16(srcMac & 0xffff));
if (attrib) {
if (!dstMac && data.dst_mac_mode() == OstProto::Mac::e_mm_resolve)
attrib->errorFlags |= FrameValueAttrib::UnresolvedDstMacError;
if (!srcMac && data.src_mac_mode() == OstProto::Mac::e_mm_resolve)
attrib->errorFlags |= FrameValueAttrib::UnresolvedSrcMacError;
}
return ba;
}
bool MacProtocol::hasErrors(QStringList *errors) const
{
bool result = false;
if ((data.dst_mac() == 0ULL)
&& (data.dst_mac_mode() != OstProto::Mac::e_mm_resolve)) {
if (errors)
*errors << QObject::tr("Frames with Destination Mac "
"00:00:00:00:00:00 are likely "
"to be dropped");
result = true;
}
if ((data.src_mac() == 0ULL)
&& (data.src_mac_mode() != OstProto::Mac::e_mm_resolve)) {
if (errors)
*errors << QObject::tr("Frames with Source Mac "
"00:00:00:00:00:00 are likely "
"to be dropped");
result = true;
}
return result;
}
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