399 lines
10 KiB
C++
399 lines
10 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 "icmp.h"
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#include "icmphelper.h"
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IcmpProtocol::IcmpProtocol(StreamBase *stream, AbstractProtocol *parent)
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: AbstractProtocol(stream, parent)
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{
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}
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IcmpProtocol::~IcmpProtocol()
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{
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// field count may change based on msgType - so don't cache field offsets
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_cacheFlags &= ~FieldFrameBitOffsetCache;
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}
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AbstractProtocol* IcmpProtocol::createInstance(StreamBase *stream,
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AbstractProtocol *parent)
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{
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return new IcmpProtocol(stream, parent);
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}
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quint32 IcmpProtocol::protocolNumber() const
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{
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return OstProto::Protocol::kIcmpFieldNumber;
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}
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void IcmpProtocol::protoDataCopyInto(OstProto::Protocol &protocol) const
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{
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protocol.MutableExtension(OstProto::icmp)->CopyFrom(data);
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protocol.mutable_protocol_id()->set_id(protocolNumber());
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}
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void IcmpProtocol::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::icmp))
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data.MergeFrom(protocol.GetExtension(OstProto::icmp));
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}
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QString IcmpProtocol::name() const
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{
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return QString("Internet Control Message Protocol");
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}
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QString IcmpProtocol::shortName() const
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{
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return QString("ICMP");
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}
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quint32 IcmpProtocol::protocolId(ProtocolIdType type) const
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{
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switch(type)
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{
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case ProtocolIdIp:
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switch(icmpVersion())
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{
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case OstProto::Icmp::kIcmp4: return 0x1;
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case OstProto::Icmp::kIcmp6: return 0x3A;
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default:break;
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}
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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 IcmpProtocol::fieldCount() const
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{
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return icmp_fieldCount;
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}
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int IcmpProtocol::frameFieldCount() const
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{
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int count;
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if (isIdSeqType(icmpVersion(), icmpType()))
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count = icmp_idSeqFrameFieldCount;
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else
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count = icmp_commonFrameFieldCount;
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return count;
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}
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AbstractProtocol::FieldFlags IcmpProtocol::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 icmp_type:
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case icmp_code:
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break;
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case icmp_checksum:
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flags |= CksumField;
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break;
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case icmp_identifier:
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case icmp_sequence:
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if (!isIdSeqType(icmpVersion(), icmpType()))
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flags &= ~FrameField;
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break;
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case icmp_version:
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case icmp_is_override_checksum:
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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 IcmpProtocol::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 icmp_type:
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{
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unsigned char type = data.type() & 0xFF;
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switch(attrib)
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{
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case FieldName:
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return QString("Type");
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case FieldValue:
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return type;
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case FieldTextValue:
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return QString("%1").arg((uint) type);
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case FieldFrameValue:
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return QByteArray(1, type);
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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 icmp_code:
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{
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unsigned char code = data.code() & 0xFF;
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switch(attrib)
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{
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case FieldName:
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return QString("Code");
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case FieldValue:
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return code;
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case FieldTextValue:
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return QString("%1").arg((uint)code);
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case FieldFrameValue:
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return QByteArray(1, code);
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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 icmp_checksum:
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{
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quint16 cksum;
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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_checksum())
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{
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cksum = data.checksum();
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}
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else
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{
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quint16 cks;
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quint32 sum = 0;
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cks = protocolFrameCksum(streamIndex, CksumIp);
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sum += (quint16) ~cks;
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cks = protocolFramePayloadCksum(streamIndex, CksumIp);
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sum += (quint16) ~cks;
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if (icmpVersion() == OstProto::Icmp::kIcmp6)
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{
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cks = protocolFrameHeaderCksum(streamIndex,
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CksumIpPseudo);
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sum += (quint16) ~cks;
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}
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while(sum>>16)
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sum = (sum & 0xFFFF) + (sum >> 16);
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cksum = (~sum) & 0xFFFF;
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}
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break;
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default:
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cksum = 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("Checksum");
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case FieldValue:
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return cksum;
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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(cksum, (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("0x%1").arg(
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cksum, 4, BASE_HEX, QChar('0'));;
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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 icmp_identifier:
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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("Identifier");
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case FieldValue:
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return data.identifier();
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case FieldTextValue:
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return QString("%1").arg(data.identifier());
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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((quint16) data.identifier(),
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(uchar*) fv.data());
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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 icmp_sequence:
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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("Sequence");
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case FieldValue:
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return data.sequence();
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case FieldTextValue:
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return QString("%1").arg(data.sequence());
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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((quint16) data.sequence(), (uchar*) fv.data());
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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 icmp_version:
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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.icmp_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 icmp_is_override_checksum:
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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_checksum();
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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 IcmpProtocol::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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if (attrib != FieldValue)
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goto _exit;
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switch (index)
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{
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case icmp_type:
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{
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uint type = value.toUInt(&isOk);
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if (isOk)
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data.set_type(type & 0xFF);
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break;
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}
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case icmp_code:
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{
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uint code = value.toUInt(&isOk);
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if (isOk)
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data.set_code(code & 0xFF);
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break;
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}
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case icmp_checksum:
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{
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uint csum = value.toUInt(&isOk);
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if (isOk)
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data.set_checksum(csum);
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break;
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}
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case icmp_identifier:
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{
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uint id = value.toUInt(&isOk);
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if (isOk)
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data.set_identifier(id);
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break;
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}
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case icmp_sequence:
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{
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uint seq = value.toUInt(&isOk);
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if (isOk)
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data.set_sequence(seq);
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break;
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}
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case icmp_version:
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{
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int ver = value.toUInt(&isOk);
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if (isOk)
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data.set_icmp_version(OstProto::Icmp::Version(ver));
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break;
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}
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case icmp_is_override_checksum:
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{
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bool ovr = value.toBool();
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data.set_is_override_checksum(ovr);
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isOk = true;
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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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_exit:
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return isOk;
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}
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