488a2ea730
Presence of IPv6 Extension Headers was causing incorrect TCP/UDP/ICMP cksums. Verified that with these changes, cksums are correct for all combinations of L3 and L4 headers with/without options/extHdrs Fixes #271
800 lines
24 KiB
C++
800 lines
24 KiB
C++
/*
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Copyright (C) 2010 Srivats P.
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This file is part of "Ostinato"
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This 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 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#include "ip6.h"
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#include <QHostAddress>
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Ip6Protocol::Ip6Protocol(StreamBase *stream, AbstractProtocol *parent)
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: AbstractProtocol(stream, parent)
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{
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}
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Ip6Protocol::~Ip6Protocol()
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{
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}
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AbstractProtocol* Ip6Protocol::createInstance(StreamBase *stream,
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AbstractProtocol *parent)
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{
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return new Ip6Protocol(stream, parent);
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}
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quint32 Ip6Protocol::protocolNumber() const
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{
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return OstProto::Protocol::kIp6FieldNumber;
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}
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void Ip6Protocol::protoDataCopyInto(OstProto::Protocol &protocol) const
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{
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protocol.MutableExtension(OstProto::ip6)->CopyFrom(data);
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protocol.mutable_protocol_id()->set_id(protocolNumber());
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}
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void Ip6Protocol::protoDataCopyFrom(const OstProto::Protocol &protocol)
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{
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if (protocol.protocol_id().id() == protocolNumber() &&
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protocol.HasExtension(OstProto::ip6))
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data.MergeFrom(protocol.GetExtension(OstProto::ip6));
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}
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QString Ip6Protocol::name() const
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{
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return QString("Internet Protocol ver 6");
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}
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QString Ip6Protocol::shortName() const
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{
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return QString("IPv6");
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}
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AbstractProtocol::ProtocolIdType Ip6Protocol::protocolIdType() const
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{
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return ProtocolIdIp;
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}
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quint32 Ip6Protocol::protocolId(ProtocolIdType type) const
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{
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switch(type)
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{
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case ProtocolIdEth: return 0x86dd;
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case ProtocolIdIp: return 0x29;
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default:break;
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}
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return AbstractProtocol::protocolId(type);
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}
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int Ip6Protocol::fieldCount() const
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{
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return ip6_fieldCount;
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}
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AbstractProtocol::FieldFlags Ip6Protocol::fieldFlags(int index) const
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{
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AbstractProtocol::FieldFlags flags;
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flags = AbstractProtocol::fieldFlags(index);
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switch (index)
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{
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case ip6_version:
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case ip6_trafficClass:
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case ip6_flowLabel:
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case ip6_payloadLength:
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case ip6_nextHeader:
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case ip6_hopLimit:
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case ip6_srcAddress:
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case ip6_dstAddress:
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break;
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case ip6_isOverrideVersion:
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case ip6_isOverridePayloadLength:
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case ip6_isOverrideNextHeader:
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case ip6_srcAddrMode:
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case ip6_srcAddrCount:
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case ip6_srcAddrPrefix:
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case ip6_dstAddrMode:
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case ip6_dstAddrCount:
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case ip6_dstAddrPrefix:
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flags &= ~FrameField;
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flags |= MetaField;
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break;
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default:
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qFatal("%s: unimplemented case %d in switch", __PRETTY_FUNCTION__,
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index);
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break;
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}
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return flags;
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}
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QVariant Ip6Protocol::fieldData(int index, FieldAttrib attrib,
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int streamIndex) const
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{
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switch (index)
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{
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case ip6_version:
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{
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quint8 ver;
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switch(attrib)
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{
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case FieldValue:
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case FieldFrameValue:
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case FieldTextValue:
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if (data.is_override_version())
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ver = data.version() & 0xF;
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else
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ver = 0x6;
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break;
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default:
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ver = 0; // avoid the 'maybe used unitialized' warning
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break;
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}
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switch(attrib)
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{
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case FieldName:
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return QString("Version");
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case FieldValue:
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return ver;
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case FieldTextValue:
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return QString("%1").arg(ver);
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case FieldFrameValue:
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return QByteArray(1, char(ver));
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case FieldBitSize:
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return 4;
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default:
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break;
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}
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break;
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}
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case ip6_trafficClass:
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{
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switch(attrib)
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{
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case FieldName:
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return QString("Traffic Class");
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case FieldValue:
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return data.traffic_class() & 0xFF;
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case FieldTextValue:
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return QString("%1").arg(data.traffic_class() & 0xFF,
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2, BASE_HEX, QChar('0'));
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case FieldFrameValue:
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return QByteArray(1, char(data.traffic_class() & 0xFF));
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default:
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break;
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}
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break;
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}
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case ip6_flowLabel:
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{
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switch(attrib)
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{
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case FieldName:
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return QString("Flow Label");
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case FieldValue:
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return data.flow_label() & 0xFFFFF;
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case FieldTextValue:
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return QString("%1").arg(data.flow_label() & 0xFFFFF,
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5, BASE_HEX, QChar('0'));
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case FieldFrameValue:
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{
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QByteArray fv;
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fv.resize(4);
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qToBigEndian((quint32) data.flow_label() & 0xFFFFF,
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(uchar*) fv.data());
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fv = fv.right(3);
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return fv;
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}
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case FieldBitSize:
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return 20;
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default:
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break;
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}
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break;
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}
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case ip6_payloadLength:
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{
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quint16 len;
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switch(attrib)
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{
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case FieldValue:
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case FieldFrameValue:
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case FieldTextValue:
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if (data.is_override_payload_length())
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len = data.payload_length();
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else
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len = protocolFramePayloadSize(streamIndex);
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break;
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default:
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len = 0; // avoid the 'maybe used unitialized' warning
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break;
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}
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switch(attrib)
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{
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case FieldName:
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return QString("Payload Length");
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case FieldValue:
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return len;
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case FieldFrameValue:
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{
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QByteArray fv;
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fv.resize(2);
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qToBigEndian(len, (uchar*) fv.data());
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return fv;
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}
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case FieldTextValue:
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return QString("%1").arg(len);
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case FieldBitSize:
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return 16;
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default:
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break;
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}
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break;
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}
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case ip6_nextHeader:
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{
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quint8 nextHdr;
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switch(attrib)
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{
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case FieldValue:
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case FieldFrameValue:
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case FieldTextValue:
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if (data.is_override_next_header()) {
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nextHdr = data.next_header();
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}
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else {
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nextHdr = payloadProtocolId(ProtocolIdIp);
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if ((nextHdr == 0)
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&& next
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&& (next->protocolIdType() == ProtocolIdNone)) {
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nextHdr = 0x3b; // IPv6 No-Next-Header
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}
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}
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break;
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default:
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nextHdr = 0; // avoid the 'maybe used unitialized' warning
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break;
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}
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switch(attrib)
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{
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case FieldName:
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return QString("Next Header");
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case FieldValue:
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return nextHdr;
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case FieldTextValue:
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return QString("%1").arg(nextHdr, 2, BASE_HEX, QChar('0'));
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case FieldFrameValue:
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return QByteArray(1, char(nextHdr));
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default:
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break;
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}
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break;
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}
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case ip6_hopLimit:
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{
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switch(attrib)
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{
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case FieldName:
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return QString("Hop Limit");
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case FieldValue:
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return data.hop_limit() & 0xFF;
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case FieldTextValue:
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return QString("%1").arg(data.hop_limit() & 0xFF);
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case FieldFrameValue:
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return QByteArray(1, char(data.hop_limit() & 0xFF));
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default:
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break;
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}
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break;
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}
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case ip6_srcAddress:
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{
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int u, p, q;
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quint64 maskHi = 0, maskLo = 0;
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quint64 prefixHi, prefixLo;
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quint64 hostHi = 0, hostLo = 0;
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quint64 srcHi = 0, srcLo = 0;
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switch(data.src_addr_mode())
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{
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case OstProto::Ip6::kFixed:
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srcHi = data.src_addr_hi();
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srcLo = data.src_addr_lo();
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break;
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case OstProto::Ip6::kIncHost:
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case OstProto::Ip6::kDecHost:
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case OstProto::Ip6::kRandomHost:
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u = streamIndex % data.src_addr_count();
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if (data.src_addr_prefix() > 64) {
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p = 64;
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q = data.src_addr_prefix() - 64;
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} else {
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p = data.src_addr_prefix();
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q = 0;
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}
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if (p > 0)
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maskHi = ~((quint64(1) << p) - 1);
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if (q > 0)
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maskLo = ~((quint64(1) << q) - 1);
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prefixHi = data.src_addr_hi() & maskHi;
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prefixLo = data.src_addr_lo() & maskLo;
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if (data.src_addr_mode() == OstProto::Ip6::kIncHost) {
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hostHi = ((data.src_addr_hi() & ~maskHi) + u) & ~maskHi;
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hostLo = ((data.src_addr_lo() & ~maskLo) + u) & ~maskLo;
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}
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else if (data.src_addr_mode() == OstProto::Ip6::kDecHost) {
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hostHi = ((data.src_addr_hi() & ~maskHi) - u) & ~maskHi;
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hostLo = ((data.src_addr_lo() & ~maskLo) - u) & ~maskLo;
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}
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else if (data.src_addr_mode()==OstProto::Ip6::kRandomHost) {
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hostHi = qrand() & ~maskHi;
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hostLo = qrand() & ~maskLo;
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}
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srcHi = prefixHi | hostHi;
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srcLo = prefixLo | hostLo;
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break;
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default:
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qWarning("Unhandled src_addr_mode = %d",
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data.src_addr_mode());
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}
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switch(attrib)
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{
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case FieldName:
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return QString("Source");
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case FieldValue:
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case FieldFrameValue:
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case FieldTextValue:
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{
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QByteArray fv;
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fv.resize(16);
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qToBigEndian(srcHi, (uchar*) fv.data());
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qToBigEndian(srcLo, (uchar*) (fv.data() + 8));
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if (attrib == FieldTextValue)
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return QHostAddress((quint8*)fv.constData()).toString();
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else
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return fv;
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}
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default:
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break;
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}
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break;
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}
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case ip6_dstAddress:
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{
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int u, p, q;
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quint64 maskHi = 0, maskLo = 0;
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quint64 prefixHi, prefixLo;
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quint64 hostHi = 0, hostLo = 0;
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quint64 dstHi = 0, dstLo = 0;
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switch(data.dst_addr_mode())
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{
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case OstProto::Ip6::kFixed:
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dstHi = data.dst_addr_hi();
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dstLo = data.dst_addr_lo();
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break;
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case OstProto::Ip6::kIncHost:
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case OstProto::Ip6::kDecHost:
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case OstProto::Ip6::kRandomHost:
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u = streamIndex % data.dst_addr_count();
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if (data.dst_addr_prefix() > 64) {
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p = 64;
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q = data.dst_addr_prefix() - 64;
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} else {
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p = data.dst_addr_prefix();
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q = 0;
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}
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if (p > 0)
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maskHi = ~((quint64(1) << p) - 1);
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if (q > 0)
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maskLo = ~((quint64(1) << q) - 1);
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prefixHi = data.dst_addr_hi() & maskHi;
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prefixLo = data.dst_addr_lo() & maskLo;
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if (data.dst_addr_mode() == OstProto::Ip6::kIncHost) {
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hostHi = ((data.dst_addr_hi() & ~maskHi) + u) & ~maskHi;
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hostLo = ((data.dst_addr_lo() & ~maskLo) + u) & ~maskLo;
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}
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else if (data.dst_addr_mode() == OstProto::Ip6::kDecHost) {
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hostHi = ((data.dst_addr_hi() & ~maskHi) - u) & ~maskHi;
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hostLo = ((data.dst_addr_lo() & ~maskLo) - u) & ~maskLo;
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}
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else if (data.dst_addr_mode()==OstProto::Ip6::kRandomHost) {
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hostHi = qrand() & ~maskHi;
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hostLo = qrand() & ~maskLo;
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}
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dstHi = prefixHi | hostHi;
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dstLo = prefixLo | hostLo;
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break;
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default:
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qWarning("Unhandled dst_addr_mode = %d",
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data.dst_addr_mode());
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}
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switch(attrib)
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{
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case FieldName:
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return QString("Destination");
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case FieldValue:
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case FieldFrameValue:
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case FieldTextValue:
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{
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QByteArray fv;
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fv.resize(16);
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qToBigEndian(dstHi, (uchar*) fv.data());
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qToBigEndian(dstLo, (uchar*) (fv.data() + 8));
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if (attrib == FieldTextValue)
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return QHostAddress((quint8*)fv.constData()).toString();
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else
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return fv;
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}
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default:
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break;
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}
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break;
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}
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// Meta-Fields
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case ip6_isOverrideVersion:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.is_override_version();
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default:
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break;
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}
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break;
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}
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case ip6_isOverridePayloadLength:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.is_override_payload_length();
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default:
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break;
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}
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break;
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}
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case ip6_isOverrideNextHeader:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.is_override_next_header();
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default:
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break;
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}
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break;
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}
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case ip6_srcAddrMode:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.src_addr_mode();
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default:
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break;
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}
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break;
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}
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case ip6_srcAddrCount:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.src_addr_count();
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default:
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break;
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}
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break;
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}
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case ip6_srcAddrPrefix:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.src_addr_prefix();
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default:
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break;
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}
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break;
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}
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case ip6_dstAddrMode:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.dst_addr_mode();
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default:
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break;
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}
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break;
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}
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case ip6_dstAddrCount:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.dst_addr_count();
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default:
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break;
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}
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break;
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}
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case ip6_dstAddrPrefix:
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{
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switch(attrib)
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{
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case FieldValue:
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return data.dst_addr_prefix();
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default:
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break;
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}
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break;
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}
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default:
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qFatal("%s: unimplemented case %d in switch", __PRETTY_FUNCTION__,
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index);
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break;
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}
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return AbstractProtocol::fieldData(index, attrib, streamIndex);
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}
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bool Ip6Protocol::setFieldData(int index, const QVariant &value,
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FieldAttrib attrib)
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{
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bool isOk = false;
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|
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if (attrib != FieldValue)
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goto _exit;
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switch (index)
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{
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case ip6_version:
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{
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uint ver = value.toUInt(&isOk);
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if (isOk)
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data.set_version(ver & 0xF);
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break;
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}
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case ip6_trafficClass:
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{
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uint trfClass = value.toUInt(&isOk);
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if (isOk)
|
|
data.set_traffic_class(trfClass & 0xFF);
|
|
break;
|
|
}
|
|
case ip6_flowLabel:
|
|
{
|
|
uint fl = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_flow_label(fl & 0xFFFFF);
|
|
break;
|
|
}
|
|
case ip6_payloadLength:
|
|
{
|
|
uint len = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_payload_length(len & 0xFFFF);
|
|
break;
|
|
}
|
|
case ip6_nextHeader:
|
|
{
|
|
uint ver = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_next_header(ver & 0xFF);
|
|
break;
|
|
}
|
|
case ip6_hopLimit:
|
|
{
|
|
uint hl = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_hop_limit(hl & 0xFF);
|
|
break;
|
|
}
|
|
case ip6_srcAddress:
|
|
{
|
|
Q_IPV6ADDR addr = QHostAddress(value.toString()).toIPv6Address();
|
|
quint64 x;
|
|
|
|
x = (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);
|
|
data.set_src_addr_hi(x);
|
|
|
|
x = (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);
|
|
data.set_src_addr_lo(x);
|
|
break;
|
|
}
|
|
case ip6_dstAddress:
|
|
{
|
|
Q_IPV6ADDR addr = QHostAddress(value.toString()).toIPv6Address();
|
|
quint64 x;
|
|
|
|
x = (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);
|
|
data.set_dst_addr_hi(x);
|
|
|
|
x = (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);
|
|
data.set_dst_addr_lo(x);
|
|
break;
|
|
}
|
|
|
|
// Meta-Fields
|
|
case ip6_isOverrideVersion:
|
|
{
|
|
bool ovr = value.toBool();
|
|
data.set_is_override_version(ovr);
|
|
isOk = true;
|
|
break;
|
|
}
|
|
case ip6_isOverridePayloadLength:
|
|
{
|
|
bool ovr = value.toBool();
|
|
data.set_is_override_payload_length(ovr);
|
|
isOk = true;
|
|
break;
|
|
}
|
|
case ip6_isOverrideNextHeader:
|
|
{
|
|
bool ovr = value.toBool();
|
|
data.set_is_override_next_header(ovr);
|
|
isOk = true;
|
|
break;
|
|
}
|
|
|
|
case ip6_srcAddrMode:
|
|
{
|
|
uint mode = value.toUInt(&isOk);
|
|
if (isOk && data.AddrMode_IsValid(mode))
|
|
data.set_src_addr_mode((OstProto::Ip6::AddrMode) mode);
|
|
else
|
|
isOk = false;
|
|
break;
|
|
}
|
|
case ip6_srcAddrCount:
|
|
{
|
|
uint count = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_src_addr_count(count);
|
|
break;
|
|
}
|
|
case ip6_srcAddrPrefix:
|
|
{
|
|
uint prefix = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_src_addr_prefix(prefix);
|
|
break;
|
|
}
|
|
|
|
case ip6_dstAddrMode:
|
|
{
|
|
uint mode = value.toUInt(&isOk);
|
|
if (isOk && data.AddrMode_IsValid(mode))
|
|
data.set_dst_addr_mode((OstProto::Ip6::AddrMode) mode);
|
|
else
|
|
isOk = false;
|
|
break;
|
|
}
|
|
case ip6_dstAddrCount:
|
|
{
|
|
uint count = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_dst_addr_count(count);
|
|
break;
|
|
}
|
|
case ip6_dstAddrPrefix:
|
|
{
|
|
uint prefix = value.toUInt(&isOk);
|
|
if (isOk)
|
|
data.set_dst_addr_prefix(prefix);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
qFatal("%s: unimplemented case %d in switch", __PRETTY_FUNCTION__,
|
|
index);
|
|
break;
|
|
}
|
|
|
|
_exit:
|
|
return isOk;
|
|
}
|
|
|
|
int Ip6Protocol::protocolFrameVariableCount() const
|
|
{
|
|
int count = AbstractProtocol::protocolFrameVariableCount();
|
|
|
|
if (data.src_addr_mode() != OstProto::Ip6::kFixed)
|
|
count = AbstractProtocol::lcm(count, data.src_addr_count());
|
|
|
|
if (data.dst_addr_mode() != OstProto::Ip6::kFixed)
|
|
count = AbstractProtocol::lcm(count, data.dst_addr_count());
|
|
|
|
return count;
|
|
}
|
|
|
|
quint32 Ip6Protocol::protocolFrameCksum(int streamIndex,
|
|
CksumType cksumType) const
|
|
{
|
|
if (cksumType == CksumIpPseudo)
|
|
{
|
|
quint32 sum = 0;
|
|
QByteArray fv = protocolFrameValue(streamIndex);
|
|
const quint8 *p = (quint8*) fv.constData();
|
|
|
|
// src-ip, dst-ip
|
|
for (int i = 8; i < fv.size(); i+=2)
|
|
sum += *((quint16*)(p + i));
|
|
|
|
// XXX: payload length and protocol are also part of the
|
|
// pseudo cksum but we need to skip extension headers to
|
|
// get to them as per RFC 8200 Section 8.1
|
|
// Since we can't traverse beyond our immediate neighboring
|
|
// protocol from here, these two fields are counted in the
|
|
// pseudo cksum in AbstractProtocol::protocolFrameHeaderCksum()
|
|
|
|
while(sum>>16)
|
|
sum = (sum & 0xFFFF) + (sum >> 16);
|
|
|
|
return qFromBigEndian((quint16) ~sum);
|
|
}
|
|
return AbstractProtocol::protocolFrameCksum(streamIndex, cksumType);
|
|
}
|
|
|