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Copy pathcPacket.cpp
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453 lines (383 loc) · 12.3 KB
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/*
*
* Copyright (C) 2013 Anwar Mohamed <anwarelmakrahy[at]gmail.com>
*
* This program 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 2 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, write to Anwar Mohamed
* anwarelmakrahy[at]gmail.com
*
*/
#include "Packetyzer.h"
#include <iostream>
#include <intrin.h>
#include <algorithm>
#include <ctime>
#pragma comment(lib, "ws2_32.lib")
using namespace std;
using namespace Packetyzer::Analyzers;
using namespace Packetyzer::Elements;
cPacket::cPacket(string filename, time_t timestamp, UINT network, UINT Options)
{
BaseAddress = 0;
Size = 0;
File = new cFile((char*)filename.c_str());
if (File->FileLength == 0) return;
BaseAddress = File->BaseAddress;
Size = File->FileLength;
Timestamp = timestamp;
RawPacket = (UCHAR*)BaseAddress;
isParsed = ProcessPacket(network, Options);
return;
};
cPacket::cPacket(UCHAR* buffer, UINT size, time_t timestamp, UINT network, UINT Options)
{
BaseAddress = 0;
Size = 0;
BaseAddress = (DWORD)buffer;
Size = size;
Timestamp = timestamp;
RawPacket = buffer;
File = NULL;
isParsed = ProcessPacket(network, Options);
return;
};
BOOL cPacket::ProcessPacket(UINT network, UINT Options)
{
ResetIs();
if (BaseAddress == 0 || Size == 0) return false;
PacketSize = Size;
switch(network)
{
case LINKTYPE_LINUX_SLL:
SLLHeader = (SLL_HEADER*)BaseAddress;
sHeader = sizeof(SLL_HEADER);
eType = ntohs(SLLHeader->ProtocolType);
hasSLLHeader = TRUE;
break;
case LINKTYPE_ETHERNET:
EthernetHeader = (ETHER_HEADER*)BaseAddress;
sHeader = sizeof(ETHER_HEADER);
eType = ntohs(EthernetHeader->ProtocolType);
hasEtherHeader = TRUE;
break;
default:
return FALSE;
}
/* check for sll or ethernet*/
if (hasEtherHeader || hasSLLHeader)
{
/* packet ether type */
if (eType == ETHERTYPE_IP)
{
isIPPacket = true;
IPHeader = (IP_HEADER*)(BaseAddress + sHeader);
if ((USHORT)(IPHeader->Protocol) == TCP_PACKET)
{
isTCPPacket = true;
TCPHeader = (TCP_HEADER*)(BaseAddress + sHeader + (IPHeader->HeaderLength*4));
TCPDataSize = Size - sHeader - (IPHeader->HeaderLength*4) - (TCPHeader->DataOffset*4);
TCPOptionsSize = (TCPHeader->DataOffset*4) - sizeof(TCP_HEADER);
if (TCPOptionsSize != 0)
TCPOptions = (UCHAR*)(BaseAddress + sHeader + (IPHeader->HeaderLength*4) +
(TCPHeader->DataOffset*4) - TCPOptionsSize);
if (TCPDataSize != 0)
TCPData= (UCHAR*)(BaseAddress) + sHeader + (IPHeader->HeaderLength*4) +
(TCPHeader->DataOffset*4);
}
else if ((USHORT)(IPHeader->Protocol) == UDP_PACKET)
{
isUDPPacket = true;
UDPHeader = (UDP_HEADER*)(BaseAddress + sHeader + (IPHeader->HeaderLength*4));
UDPDataSize = ntohs(UDPHeader->DatagramLength) - sizeof(UDP_HEADER);
UDPData = (UCHAR*)(BaseAddress + sHeader + (IPHeader->HeaderLength*4) + sizeof(UDP_HEADER));
}
else if ((USHORT)(IPHeader->Protocol) == ICMP_PACKET)
{
isICMPPacket = true;
ICMPHeader = (ICMP_HEADER*)(BaseAddress + sHeader + (IPHeader->HeaderLength*4));
ICMPDataSize = Size - sHeader - (IPHeader->HeaderLength*4) - sizeof(ICMP_HEADER);
ICMPData = (UCHAR*)(BaseAddress + sHeader + (IPHeader->HeaderLength*4) + sizeof(ICMP_HEADER));
}
else if ((USHORT)(IPHeader->Protocol) == IGMP_PACKET)
{
isIGMPPacket = true;
IGMPHeader = (IGMP_HEADER*)(BaseAddress + sHeader + (IPHeader->HeaderLength*4));
}
}
else if (eType == ETHERTYPE_ARP)
{
isARPPacket = true;
ARPHeader = (ARP_HEADER*)(BaseAddress + sHeader);
}
else if (eType == ETHERTYPE_IPV6)
{
}
else
{
isUnknownPacket = TRUE;
return FALSE;
}
if (Options & CPACKET_OPTIONS_MALFORM_CHECK) CheckIfMalformed();
return true;
}
else return FALSE;
};
void cPacket::CheckIfMalformed()
{
isMalformed = false;
PacketError = PACKET_NOERROR;
if (isIPPacket)
{
IP_HEADER *ipheader = new IP_HEADER;
memcpy(ipheader,IPHeader,sizeof(IP_HEADER));
ipheader->Checksum =0x0000;
if(GlobalChecksum((USHORT*)ipheader,sizeof(IP_HEADER)) != IPHeader->Checksum)
{
isMalformed = true;
PacketError = PACKET_IP_CHECKSUM;
delete ipheader;
}
else if (isTCPPacket)
{
TCP_HEADER *tcpheader = new TCP_HEADER;
memcpy(tcpheader,TCPHeader,sizeof(TCP_HEADER));
tcpheader->Checksum = 0x0000;
PSEUDO_HEADER *psheader = new PSEUDO_HEADER;
memcpy(&psheader->daddr, &IPHeader->DestinationAddress, sizeof(UINT));
memcpy(&psheader->saddr, &IPHeader->SourceAddress, sizeof(UINT));
psheader->protocol = IPHeader->Protocol;
psheader->length = htons((USHORT)(sizeof(TCP_HEADER) + TCPOptionsSize + TCPDataSize));
psheader->zero = 0;
UINT packet_size = sizeof(TCP_HEADER) + TCPOptionsSize + TCPDataSize + sizeof(PSEUDO_HEADER);
packet_size = packet_size + ((packet_size%2)*2);
UCHAR *tcppacket = (UCHAR*)malloc(packet_size);
memset(tcppacket,0, packet_size);
memcpy(&tcppacket[0], psheader, sizeof(PSEUDO_HEADER));
memcpy(&tcppacket[sizeof(PSEUDO_HEADER)], tcpheader,sizeof(TCP_HEADER));
memcpy(&tcppacket[sizeof(PSEUDO_HEADER) + sizeof(TCP_HEADER)],TCPOptions,TCPOptionsSize);
memcpy(&tcppacket[sizeof(PSEUDO_HEADER) + sizeof(TCP_HEADER) + TCPOptionsSize],TCPData, TCPDataSize);
if (GlobalChecksum((USHORT*)tcppacket,packet_size) != TCPHeader->Checksum)
{
isMalformed = true;
PacketError = PACKET_TCP_CHECKSUM;
}
delete ipheader;
delete tcpheader;
delete psheader;
free(tcppacket);
}
else if (isUDPPacket)
{
UDP_HEADER *udpheader = new UDP_HEADER;
memcpy(udpheader,UDPHeader,sizeof(UDP_HEADER));
udpheader->Checksum = 0;
PSEUDO_HEADER *psheader = new PSEUDO_HEADER;
memcpy(&psheader->daddr, &IPHeader->DestinationAddress, sizeof(UINT));
memcpy(&psheader->saddr, &IPHeader->SourceAddress, sizeof(UINT));
psheader->protocol = IPHeader->Protocol;
psheader->length = htons((USHORT)(sizeof(UDP_HEADER) + UDPDataSize));
psheader->zero = 0;
UCHAR *udppacket;
UINT packet_size = sizeof(UDP_HEADER) + UDPDataSize + sizeof(PSEUDO_HEADER);
packet_size = packet_size + ((packet_size%2)*2);
udppacket = (UCHAR*)malloc(packet_size);
memset(udppacket,0, packet_size);
memcpy(&udppacket[0], psheader, sizeof(PSEUDO_HEADER));
memcpy(&udppacket[sizeof(PSEUDO_HEADER)], udpheader,sizeof(UDP_HEADER));
memcpy(&udppacket[sizeof(PSEUDO_HEADER) + sizeof(UDP_HEADER)],UDPData,UDPDataSize);
if (GlobalChecksum((USHORT*)udppacket,packet_size) != UDPHeader->Checksum)
{
isMalformed = true;
PacketError = PACKET_UDP_CHECKSUM;
}
delete ipheader;
delete udpheader;
delete psheader;
free(udppacket);
}
else if (isICMPPacket)
{
ICMP_HEADER *icmpheader = new ICMP_HEADER;
memcpy(icmpheader,ICMPHeader,sizeof(ICMP_HEADER));
icmpheader->Checksum = 0x0000;
UINT packet_size = sizeof(ICMP_HEADER) + ICMPDataSize;
packet_size = packet_size + ((packet_size%2)*2);
UCHAR *icmppacket = (UCHAR*)malloc(packet_size);
memset(icmppacket,0, packet_size);
memcpy(icmppacket, icmpheader,sizeof(ICMP_HEADER));
memcpy(&icmppacket[sizeof(ICMP_HEADER)],ICMPData,ICMPDataSize);
if (GlobalChecksum((USHORT*)icmppacket,packet_size) != ICMPHeader->Checksum)
{
isMalformed = true;
PacketError = PACKET_ICMP_CHECKSUM;
}
delete ipheader;
delete icmpheader;
free(icmppacket);
}
if (isIPPacket && IPHeader->TimeToLive <= 10)
{
isMalformed = true;
PacketError = PACKET_IP_TTL;
}
}
};
USHORT cPacket::GlobalChecksum(USHORT *buffer, UINT length)
{
register int sum = 0;
USHORT answer = 0;
register USHORT *w = buffer;
register int nleft = length;
while(nleft > 1){
sum += *w++;
nleft -= 2;
}
sum = (sum >> 16) + (sum & 0xFFFF);
sum += (sum >> 16);
answer = ~sum;
return(answer);
}
cPacket::~cPacket()
{
if (File != NULL) delete File;
};
void cPacket::ResetIs()
{
isTCPPacket = FALSE;
isUDPPacket = FALSE;
isICMPPacket = FALSE;
isIGMPPacket = FALSE;
isARPPacket = FALSE;
isIPPacket = FALSE;
PacketError = PACKET_NOERROR;
isMalformed = FALSE;
isParsed = FALSE;
isIPv6Packet = FALSE;
TCPDataSize = 0;
TCPOptionsSize = 0;
ICMPDataSize = 0;
UDPDataSize = 0;
SLLHeader = NULL;
EthernetHeader = NULL;
IPHeader = NULL;
TCPHeader = NULL;
ARPHeader = NULL;
UDPHeader = NULL;
ICMPHeader = NULL;
IGMPHeader = NULL;
hasSLLHeader = FALSE;
hasEtherHeader = FALSE;
isUnknownPacket = FALSE;
};
BOOL cPacket::FixICMPChecksum()
{
if (!isICMPPacket) return FALSE;
ICMP_HEADER *icmpheader = new ICMP_HEADER;
memcpy(icmpheader,ICMPHeader,sizeof(ICMP_HEADER));
icmpheader->Checksum = 0;
UINT packet_size = sizeof(ICMP_HEADER) + ICMPDataSize;
packet_size = packet_size + ((packet_size%2)*2);
UCHAR* icmppacket = (UCHAR*)malloc(packet_size);
memset(icmppacket,0, packet_size);
memcpy(icmppacket, icmpheader,sizeof(ICMP_HEADER));
memcpy(&icmppacket[sizeof(ICMP_HEADER)],ICMPData,ICMPDataSize);
USHORT crc = GlobalChecksum((USHORT*)icmppacket,packet_size);
delete icmpheader;
free(icmppacket);
if(crc != ICMPHeader->Checksum)
{
memcpy(&ICMPHeader->Checksum,&crc,sizeof(USHORT));
CheckIfMalformed();
return true;
}
else return false;
};
BOOL cPacket::FixIPChecksum()
{
if (!isIPPacket) return FALSE;
IP_HEADER *ipheader = new IP_HEADER;
memcpy(ipheader,IPHeader,sizeof(IP_HEADER));
ipheader->Checksum =0;
USHORT crc = GlobalChecksum((USHORT*)ipheader,sizeof(IP_HEADER));
delete ipheader;
if(crc != IPHeader->Checksum)
{
memcpy(&IPHeader->Checksum,&crc,sizeof(USHORT));
CheckIfMalformed();
return true;
}
else return false;
};
BOOL cPacket::FixTCPChecksum()
{
if (!isTCPPacket) return FALSE;
TCP_HEADER *tcpheader = new TCP_HEADER;
memcpy(tcpheader,TCPHeader,sizeof(TCP_HEADER));
tcpheader->Checksum = 0;
PSEUDO_HEADER *psheader = new PSEUDO_HEADER;
memcpy(&psheader->daddr, &IPHeader->DestinationAddress, sizeof(UINT));
memcpy(&psheader->saddr, &IPHeader->SourceAddress, sizeof(UINT));
psheader->protocol = IPHeader->Protocol;
psheader->length = htons((USHORT)(sizeof(TCP_HEADER) + TCPOptionsSize + TCPDataSize));
psheader->zero = 0;
UINT packet_size = sizeof(TCP_HEADER) + TCPOptionsSize + TCPDataSize + sizeof(PSEUDO_HEADER);
packet_size = packet_size + ((packet_size%2)*2);
UCHAR* tcppacket = (UCHAR*)malloc(packet_size);
memset(tcppacket,0, packet_size);
memcpy(tcppacket, psheader, sizeof(PSEUDO_HEADER));
memcpy(&tcppacket[sizeof(PSEUDO_HEADER)], tcpheader,sizeof(TCP_HEADER));
memcpy(&tcppacket[sizeof(PSEUDO_HEADER) + sizeof(TCP_HEADER)],TCPOptions,TCPOptionsSize);
memcpy(&tcppacket[sizeof(PSEUDO_HEADER) + sizeof(TCP_HEADER) + TCPOptionsSize],TCPData, TCPDataSize);
USHORT crc = GlobalChecksum((USHORT*)tcppacket,packet_size);
delete psheader;
delete tcpheader;
free(tcppacket);
if (crc != TCPHeader->Checksum)
{
memcpy(&TCPHeader->Checksum,&crc,sizeof(USHORT));
CheckIfMalformed();
return true;
}
else return false;
};
BOOL cPacket::FixUDPChecksum()
{
if (!isUDPPacket) return FALSE;
UDP_HEADER *udpheader = new UDP_HEADER;
memcpy(udpheader,UDPHeader,sizeof(UDP_HEADER));
udpheader->Checksum = 0;
PSEUDO_HEADER *psheader = new PSEUDO_HEADER;
memcpy(&psheader->daddr, &IPHeader->DestinationAddress, sizeof(UINT));
memcpy(&psheader->saddr, &IPHeader->SourceAddress, sizeof(UINT));
psheader->protocol = IPHeader->Protocol;
psheader->length = htons((USHORT)(sizeof(UDP_HEADER) + UDPDataSize));
psheader->zero = 0;
UINT packet_size = sizeof(UDP_HEADER) + UDPDataSize + sizeof(PSEUDO_HEADER);
packet_size = packet_size + ((packet_size%2)*2);
UCHAR* udppacket = (UCHAR*)malloc(packet_size);
memset(udppacket,0, packet_size);
memcpy(&udppacket, psheader, sizeof(PSEUDO_HEADER));
memcpy(&udppacket[sizeof(PSEUDO_HEADER)], udpheader,sizeof(UDP_HEADER));
memcpy(&udppacket[sizeof(PSEUDO_HEADER) + sizeof(UDP_HEADER)],UDPData,UDPDataSize);
USHORT crc = GlobalChecksum((USHORT*)udppacket,packet_size);
delete psheader;
delete udpheader;
free(udppacket);
if (crc != UDPHeader->Checksum)
{
memcpy(&UDPHeader->Checksum,&crc,sizeof(USHORT));
CheckIfMalformed();
return true;
}
else return false;
};
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