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Retail products

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Traffic interception SDK

Control every TCP/IP network connection

• Route connections via proxy
• Redirect connections and modify the data
• Block connections and applications

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SSL interception SDK

View SSL in plaintext and modify it

• View the SSL stream decrypted in plaintext
• Redirect SSL connection and modify decrypted data
• Browser shows "SSL lock" without warnings

Learn More

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Documentation

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ICMPCrafter.cpp Go to the documentation of this file. /* * Copyright (c) 2000-2003 Barak Weichselbaum <barak@komodia.com> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Contact info: * ------------- * * Site: http://www.komodia.com * Main contact: barak@komodia.com * For custom projects, * consulting, or other * paid services: sales@komodia.com */ #include "stdafx.h" #include "ICMPCrafter.h" #include "ErrorHandlerMacros.h" #include "Array_ptr.h" #include <memory> #ifdef _MEMORY_DEBUG #define new DEBUG_NEW #define malloc DEBUG_MALLOC static char THIS_FILE[] = __FILE__; #endif KOMODIA_NAMESPACE_START #define CICMPCrafter_Class "CICMPCrafter" CICMPCrafter::CICMPCrafter() : CIPCrafter(), CICMPSocket(TRUE) { try { //Set our name SetName(CICMPCrafter_Class); //Set the protocol SetProtocol(IPPROTO_ICMP); //Data initialization m_bDefaultChecksum=FALSE; m_usChecksum=0; } ERROR_HANDLER("CICMPCrafter") } CICMPCrafter::~CICMPCrafter() { } LPIpHeader CICMPCrafter::ConstructIPHeader(unsigned char ucProtocol, unsigned short usFragmentationFlags, unsigned char ucTTL, unsigned short usIdentification, unsigned char ucHeaderLength)const { return ConstructCraftedIPHeader(ucProtocol, usFragmentationFlags, ucTTL, usIdentification, ucHeaderLength); } void CICMPCrafter::FinalIPHeader(LPIpHeader lpHead)const { try { //Check if we need to modify the header if (!m_DefaultChecksum) lpHead->usChecksum=htons(m_usChecksum); } ERROR_HANDLER("FinalIPHeader") } void CICMPCrafter::SetICMPUseDefaultChecksum(BOOL bDefault) { m_bDefaultChecksum=bDefault; } void CICMPCrafter::SetICMPChecksum(unsigned short usChecksum) { m_usChecksum=usChecksum; } void CICMPCrafter::FinalICMPHeader(LPICMPHeader lpHead)const { if (!m_bDefaultChecksum) lpHead->usICMPChecksum=htons(m_usChecksum); } void CICMPCrafter::SetDestinationAddress(IP aDestinationAddress) { m_aDestinationAddress=aDestinationAddress; } void CICMPCrafter::SetDestinationAddress(const std::string& rDestinationAddress) { //Check if null if (rDestinationAddress.empty()) m_aDestinationAddress=0; else m_aDestinationAddress=StringToLong(rDestinationAddress); } char* CICMPCrafter::GetTime(unsigned char cType, unsigned short& usTotalSize)const { try { return CreateFinal(ICMP_Time, cType, usTotalSize); } ERROR_HANDLER_RETURN("GetTime",NULL) } char* CICMPCrafter::GetParameter(unsigned char cError, unsigned short& usTotalSize)const { try { //Consturct the packet LPICMPHeader lpHead; lpHead=ConstructICMP(); if (!lpHead) { ReportError("GetParameter","Failed to construct ICMP header!"); return FALSE; } //Protect it std::auto_ptr<ICMPHeader> pProtection(lpHead); //Set the values lpHead->ucICMPType=ICMP_Parameter; lpHead->ucICMPCode=ICMP_Parameter_ERROR; lpHead->sICMP.sUC.uc1=cError; //And the checksum lpHead->usICMPChecksum=CalculateChecksum((unsigned short*)lpHead,ICMPHeaderLength); //Create the packet return CreateFinal(lpHead, usTotalSize); } ERROR_HANDLER_RETURN("GetParameter",NULL) } char* CICMPCrafter::GetQuench(unsigned short& usTotalSize)const { try { return CreateFinal(ICMP_Quench, 0, usTotalSize); } ERROR_HANDLER_RETURN("GetQuench",NULL) } char* CICMPCrafter::GetRedirect(unsigned char cType, IP aGatewayAddress, unsigned short& usTotalSize)const { try { //Construct the header LPICMPHeader lpHead; lpHead=ConstructICMP(); if (!lpHead) { ReportError("GetRedirect","Failed to construct ICMP header!"); return FALSE; } //Protect it std::auto_ptr<ICMPHeader> pProtection(lpHead); //Set the values lpHead->ucICMPType=ICMP_Redirect; lpHead->ucICMPCode=cType; lpHead->sICMP.sUL=aGatewayAddress; //And the checksum lpHead->usICMPChecksum=CalculateChecksum((unsigned short*)lpHead,ICMPHeaderLength); //Create the packet return CreateFinal(lpHead, usTotalSize); } ERROR_HANDLER_RETURN("GetRedirect",NULL) } char* CICMPCrafter::GetEcho(BOOL bReply, unsigned short usIdentifier, unsigned short usSequence, unsigned long ulData, unsigned short& usTotalSize)const { try { //Create the header LPICMPHeader lpHead; lpHead=ConstructICMP(); if (!lpHead) { ReportError("SendEcho","Failed to construct ICMP header!"); return FALSE; } //Protect it std::auto_ptr<ICMPHeader> pProtection(lpHead); //Check if echo or reply if (bReply) lpHead->ucICMPType=ICMP_Echo_Reply; else lpHead->ucICMPType=ICMP_Echo; lpHead->ucICMPCode=0; lpHead->sICMP.sUS.us1=htons(usIdentifier); lpHead->sICMP.sUS.us2=htons(usSequence); lpHead->ulICMP_Originate_Timestamp=htonl(ulData); //And the checksum lpHead->usICMPChecksum=CalculateChecksum((unsigned short*)lpHead,ICMPHeaderLength); //Create the packet return CreateFinal(lpHead, usTotalSize); } ERROR_HANDLER_RETURN("GetEcho",NULL) } char* CICMPCrafter::GetTimestamp(BOOL bReply, unsigned short usIdentifier, unsigned short usSequence, unsigned long ulOriginateTimestamp, unsigned long ulReceiveTimestamp, unsigned long ulTransmitTimestamp, unsigned short& usTotalSize)const { try { //Create the header LPICMPHeader lpHead; lpHead=ConstructICMP(); if (!lpHead) { ReportError("GetTimestamp","Failed to construct ICMP header!"); return FALSE; } //Protect it std::auto_ptr<ICMPHeader> pProtection(lpHead); //Check if echo or reply if (bReply) lpHead->ucICMPType=ICMP_Timestamp_Reply; else lpHead->ucICMPType=ICMP_Timestamp; lpHead->ucICMPCode=0; lpHead->sICMP.sUS.us1=htons(usIdentifier); lpHead->sICMP.sUS.us2=htons(usSequence); lpHead->ulICMP_Originate_Timestamp=htonl(ulOriginateTimestamp); lpHead->ulICMP_Receive_Timestamp=htonl(ulReceiveTimestamp); lpHead->ulICMP_Transmit_Timestamp=htonl(ulTransmitTimestamp); //And the checksum lpHead->usICMPChecksum=CalculateChecksum((unsigned short*)lpHead,ICMPHeaderLength); //Create the packet return CreateFinal(lpHead, usTotalSize); } ERROR_HANDLER_RETURN("GetTimestamp",NULL) } char* CICMPCrafter::GetInformation(BOOL bReply, unsigned short usIdentifier, unsigned short usSequence, unsigned short& usTotalSize)const { try { //Create the header LPICMPHeader lpHead; lpHead=ConstructICMP(); if (!lpHead) { ReportError("GetInformation","Failed to construct ICMP header!"); return FALSE; } //Protect it std::auto_ptr<ICMPHeader> pProtection(lpHead); //Check if echo or reply if (bReply) lpHead->ucICMPType=ICMP_Information_Reply; else lpHead->ucICMPType=ICMP_Information; lpHead->ucICMPCode=0; lpHead->sICMP.sUS.us1=htons(usIdentifier); lpHead->sICMP.sUS.us2=htons(usSequence); //And the checksum //Using only first 8 bytes lpHead->usICMPChecksum=CalculateChecksum((unsigned short*)lpHead,ICMP_Information_SIZE); //Create the packet return CreateFinal(lpHead, usTotalSize); } ERROR_HANDLER_RETURN("GetInformation",NULL) } char* CICMPCrafter::GetUnreachable(unsigned char cType, unsigned short& usTotalSize)const { try { return CreateFinal(ICMP_Unreachable, cType, usTotalSize); } ERROR_HANDLER_RETURN("GetUnreachable",FALSE) } char* CICMPCrafter::CreateFinal(unsigned char cICMP, unsigned char cType, unsigned short& usTotalSize)const { try { //Generic ICMP send LPICMPHeader lpHead; lpHead=ConstructICMP(); if (!lpHead) { ReportError("CreateFinal","Failed to construct ICMP header!"); return NULL; } //Protect it std::auto_ptr<ICMPHeader> pProtection(lpHead); //Set the data lpHead->ucICMPType=cICMP; lpHead->ucICMPCode=cType; //And the checksum lpHead->usICMPChecksum=CalculateChecksum((unsigned short*)lpHead,ICMPHeaderLength); //Call the final modifier FinalICMPHeader(lpHead); //And construct higher level return CIPCrafter::GetCraftedPacket(this, m_aDestinationAddress, (char*)lpHead, ICMPHeaderLength, usTotalSize); } ERROR_HANDLER_RETURN("CreateFinal",NULL) } char* CICMPCrafter::CreateFinal(const LPICMPHeader pHeader, unsigned short& usTotalSize)const { try { //Do we have a send buffer if (GetSendBuffer()) { //Calculate the new size unsigned long ulNewSize; ulNewSize=GetBufferSize()+ICMPHeaderLength; //Create a new buffer for it char* pBuffer; pBuffer=new char[ulNewSize]; //Protect it CArray_ptr<char> pProtection(pBuffer); //Copy the data memcpy(pBuffer,pHeader,ICMPHeaderLength); memcpy(pBuffer+ICMPHeaderLength, GetSendBuffer(), GetBufferSize()); //And create the crafted packet return CIPCrafter::GetCraftedPacket(this, m_aDestinationAddress, pBuffer, ulNewSize, usTotalSize); } else return CIPCrafter::GetCraftedPacket(this, m_aDestinationAddress, (char*)pHeader, ICMPHeaderLength, usTotalSize); } ERROR_HANDLER_RETURN("CreateFinal",NULL) } KOMODIA_NAMESPACE_END

Copyright © 2009 Komodia Inc. All rights reserved

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