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/***************************************************************************
* RawData.cc -- The RawData Class represents a network packet payload. It *
* is essentially a single buffer that may contain either random data or *
* caller supplied data. This class can be used, for example, to be linked *
* to a UDP datagram. *
* *
***********************IMPORTANT NMAP LICENSE TERMS************************
*
* The Nmap Security Scanner is (C) 1996-2023 Nmap Software LLC ("The Nmap
* Project"). Nmap is also a registered trademark of the Nmap Project.
*
* This program is distributed under the terms of the Nmap Public Source
* License (NPSL). The exact license text applying to a particular Nmap
* release or source code control revision is contained in the LICENSE
* file distributed with that version of Nmap or source code control
* revision. More Nmap copyright/legal information is available from
* https://nmap.org/book/man-legal.html, and further information on the
* NPSL license itself can be found at https://nmap.org/npsl/ . This
* header summarizes some key points from the Nmap license, but is no
* substitute for the actual license text.
*
* Nmap is generally free for end users to download and use themselves,
* including commercial use. It is available from https://nmap.org.
*
* The Nmap license generally prohibits companies from using and
* redistributing Nmap in commercial products, but we sell a special Nmap
* OEM Edition with a more permissive license and special features for
* this purpose. See https://nmap.org/oem/
*
* If you have received a written Nmap license agreement or contract
* stating terms other than these (such as an Nmap OEM license), you may
* choose to use and redistribute Nmap under those terms instead.
*
* The official Nmap Windows builds include the Npcap software
* (https://npcap.com) for packet capture and transmission. It is under
* separate license terms which forbid redistribution without special
* permission. So the official Nmap Windows builds may not be redistributed
* without special permission (such as an Nmap OEM license).
*
* Source is provided to this software because we believe users have a
* right to know exactly what a program is going to do before they run it.
* This also allows you to audit the software for security holes.
*
* Source code also allows you to port Nmap to new platforms, fix bugs, and add
* new features. You are highly encouraged to submit your changes as a Github PR
* or by email to the dev@nmap.org mailing list for possible incorporation into
* the main distribution. Unless you specify otherwise, it is understood that
* you are offering us very broad rights to use your submissions as described in
* the Nmap Public Source License Contributor Agreement. This is important
* because we fund the project by selling licenses with various terms, and also
* because the inability to relicense code has caused devastating problems for
* other Free Software projects (such as KDE and NASM).
*
* The free version of Nmap 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. Warranties,
* indemnification and commercial support are all available through the
* Npcap OEM program--see https://nmap.org/oem/
*
***************************************************************************/
/* This code was originally part of the Nping tool. */
#include "RawData.h"
/******************************************************************************/
/* CONTRUCTORS, DESTRUCTORS AND INITIALIZATION METHODS */
/******************************************************************************/
RawData::RawData(){
this->reset();
} /* End of RawData contructor */
RawData::~RawData(){
if(this->data!=NULL){
free(this->data);
this->data=NULL;
}
} /* End of RawData destructor */
/** Sets every attribute to its default value */
void RawData::reset(){
this->data=NULL;
this->length=0;
} /* End of reset() */
/******************************************************************************/
/* PacketElement:: OVERWRITTEN METHODS */
/******************************************************************************/
u8 * RawData::getBufferPointer(){
return this->getBufferPointer(NULL);
} /* End of getBufferPointer() */
u8 * RawData::getBufferPointer(int *mylen){
if(mylen!=NULL)
*mylen=this->length;
return this->data;
} /* End of getBufferPointer() */
/** Added for consistency with the rest of classes of the PacketElement family. */
int RawData::storeRecvData(const u8 *buf, size_t len){
return this->store(buf, len);
} /* End of storeRecvData() */
/* Returns a protocol identifier. This is used by packet parsing funtions
* that return linked lists of PacketElement objects, to determine the protocol
* the object represents. */
int RawData::protocol_id() const {
return HEADER_TYPE_RAW_DATA;
} /* End of protocol_id() */
/** Determines if the data stored in the object after an storeRecvData() call
* is valid and safe to use. This mainly checks the length of the data but may
* also test the value of certain protocol fields to ensure their correctness.
* @return the length, in bytes, of the header, if its found to be valid or
* OP_FAILURE (-1) otherwise. */
int RawData::validate(){
return this->length;
} /* End of validate() */
/** Prints the contents of the header and calls print() on the next protocol
* header in the chain (if there is any).
* @return OP_SUCCESS on success and OP_FAILURE in case of error. */
int RawData::print(FILE *output, int detail) const {
fprintf(output, "Payload[");
fprintf(output, "%d byte%s]", this->length, (this->length!=1)? "s":"");
if(this->next!=NULL){
print_separator(output, detail);
next->print(output, detail);
}
return OP_SUCCESS;
} /* End of print() */
/******************************************************************************/
/* PROTOCOL-SPECIFIC METHODS */
/******************************************************************************/
int RawData::store(const u8 *buf, size_t len){
/* If buffer had already been set, try to reuse it. */
if(this->data!=NULL){
if( this->length >= (int)len ){
memcpy(this->data, buf, len);
this->length=(int)len;
return OP_SUCCESS;
}else{
free(this->data);
}
}
if( (this->data=(u8 *)calloc(len, sizeof(u8)))==NULL )
return OP_FAILURE;
memcpy(this->data, buf, len);
this->length=(int)len;
return OP_SUCCESS;
} /* End of store() */
int RawData::store(const char *str){
if(str==NULL)
return OP_FAILURE;
else
return this->store((const u8*)str, strlen(str));
} /* End of store() */
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