482 lines
20 KiB
C++
482 lines
20 KiB
C++
|
/*
|
||
|
|
** Command & Conquer Renegade(tm)
|
||
|
|
** Copyright 2025 Electronic Arts Inc.
|
||
|
|
**
|
||
|
|
** 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 3 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, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
*
|
||
|
|
* FILE
|
||
|
|
* $Archive: /Commando/Code/WWOnline/GameResPacket.cpp $
|
||
|
|
*
|
||
|
|
* DESCRIPTION
|
||
|
|
*
|
||
|
|
* PROGRAMMER
|
||
|
|
* $Author: Denzil_l $
|
||
|
|
*
|
||
|
|
* VERSION INFO
|
||
|
|
* $Revision: 4 $
|
||
|
|
* $Modtime: 12/11/01 6:23p $
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include "GameResPacket.h"
|
||
|
|
#include <assert.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <winsock.h>
|
||
|
|
|
||
|
|
namespace WWOnline {
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GameResPacket::~GameResPacket -- destroys a packet class be freeing list *
|
||
|
|
* *
|
||
|
|
* INPUT: none *
|
||
|
|
* *
|
||
|
|
* OUTPUT: none *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/24/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
GameResPacket::~GameResPacket(void)
|
||
|
|
{
|
||
|
|
GameResField* current;
|
||
|
|
GameResField* next;
|
||
|
|
|
||
|
|
// Loop through the entire field list and delete each entry.
|
||
|
|
for (current = mHead; current; current = next)
|
||
|
|
{
|
||
|
|
next = current->mNext;
|
||
|
|
delete current;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GameResPacket::ADD_FIELD -- Adds a GameResField entry to head of packet li *
|
||
|
|
* *
|
||
|
|
* INPUT: GameResField * - a properly constructed field class entry. *
|
||
|
|
* *
|
||
|
|
* OUTPUT: none *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/24/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
void GameResPacket::Add_Field(GameResField *field)
|
||
|
|
{
|
||
|
|
field->mNext = mHead;
|
||
|
|
mHead = field;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GameResPacket::GameResPacket -- Creates a Packet object from a COMMS packe *
|
||
|
|
* *
|
||
|
|
* INPUT: *
|
||
|
|
* *
|
||
|
|
* OUTPUT: *
|
||
|
|
* *
|
||
|
|
* WARNINGS: *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/22/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
GameResPacket::GameResPacket(unsigned char* curbuf)
|
||
|
|
{
|
||
|
|
// Pull the size and packet ID out of the linear packet stream.
|
||
|
|
mSize = ntohl(*(unsigned long*)curbuf);
|
||
|
|
curbuf += sizeof(mSize);
|
||
|
|
|
||
|
|
mID = ntohs(*(unsigned short*)curbuf);
|
||
|
|
curbuf += sizeof(mID);
|
||
|
|
|
||
|
|
mReserved = ntohs(*(unsigned short*)curbuf);
|
||
|
|
curbuf += sizeof(mReserved);
|
||
|
|
|
||
|
|
mHead = NULL;
|
||
|
|
|
||
|
|
// Calculate the remaining size so that we can loop through the
|
||
|
|
// packets and extract them.
|
||
|
|
unsigned long remaining_size = (mSize - (sizeof(mSize) + sizeof(mID) + sizeof(mReserved)));
|
||
|
|
|
||
|
|
// Loop through the linear packet until we run out of room and
|
||
|
|
// create a field for each.
|
||
|
|
while (remaining_size > 0)
|
||
|
|
{
|
||
|
|
GameResField* field = new GameResField;
|
||
|
|
|
||
|
|
// Copy the adjusted header into the buffer and then advance the buffer
|
||
|
|
memcpy(field, curbuf, GAMERESFIELD_HEADER_SIZE);
|
||
|
|
curbuf += GAMERESFIELD_HEADER_SIZE;
|
||
|
|
remaining_size -= GAMERESFIELD_HEADER_SIZE;
|
||
|
|
|
||
|
|
// Copy the data into the buffer
|
||
|
|
unsigned short size = ntohs(field->mSize);
|
||
|
|
field->mData = new unsigned char[size];
|
||
|
|
memcpy(field->mData, curbuf, size);
|
||
|
|
curbuf += size;
|
||
|
|
remaining_size -= size;
|
||
|
|
|
||
|
|
// Make sure we allow for the pad bytes.
|
||
|
|
int pad = (4 - (ntohs(field->mSize) & 3)) & 3;
|
||
|
|
curbuf += pad;
|
||
|
|
remaining_size -= pad;
|
||
|
|
|
||
|
|
// Convert the field back to the host format
|
||
|
|
field->Net_To_Host();
|
||
|
|
|
||
|
|
// Finally add the field to the field list in the packet
|
||
|
|
// structure.
|
||
|
|
Add_Field(field);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* CREATE_COMMS_PACKET -- Walks field list creating a packet *
|
||
|
|
* *
|
||
|
|
* INPUT: short - the id of the packet so the server can identify it *
|
||
|
|
* unsigned short & - the size of the packet returned here *
|
||
|
|
* *
|
||
|
|
* OUTPUT: void * pointer to the linear packet data *
|
||
|
|
* *
|
||
|
|
* WARNINGS: This routine allocates memory that the user is responsible*
|
||
|
|
* for freeing. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/22/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
unsigned char* GameResPacket::Create_Comms_Packet(unsigned long& size, char* sig_name, unsigned long& sig_offset)
|
||
|
|
{
|
||
|
|
GameResField* current;
|
||
|
|
sig_offset = 0;
|
||
|
|
|
||
|
|
// Size starts at 8 because that is the size of the packet header. (size[4] + id[2] + reserved[2])
|
||
|
|
size = (sizeof(mSize) + sizeof(mID) + sizeof(mReserved));
|
||
|
|
|
||
|
|
// Take a quick spin through and calculate the size of the packet we
|
||
|
|
// are building.
|
||
|
|
for (current = mHead; current; current = current->mNext)
|
||
|
|
{
|
||
|
|
size += (unsigned long)GAMERESFIELD_HEADER_SIZE; // add in packet header size
|
||
|
|
size += current->mSize; // add in data size
|
||
|
|
size += (4 - (current->mSize & 3)) & 3; // add in pad value to dword align next packet
|
||
|
|
}
|
||
|
|
|
||
|
|
// Now that we know the size allocate a buffer big enough to hold the
|
||
|
|
// packet.
|
||
|
|
unsigned char* bufferStart = new unsigned char[size];
|
||
|
|
unsigned char* curbuf = bufferStart;
|
||
|
|
|
||
|
|
// write the size into the packet header
|
||
|
|
*(unsigned long*)curbuf = htonl(size);
|
||
|
|
curbuf += sizeof(unsigned long);
|
||
|
|
|
||
|
|
*(unsigned short*)curbuf = htons(mID);
|
||
|
|
curbuf += sizeof(unsigned short);
|
||
|
|
|
||
|
|
*(unsigned short*)curbuf = htons(mReserved);
|
||
|
|
curbuf += sizeof(unsigned short);
|
||
|
|
|
||
|
|
// Ok now that the actual header information has been written we need to write out
|
||
|
|
// field information.
|
||
|
|
for (current = mHead; current; current = current->mNext)
|
||
|
|
{
|
||
|
|
#ifdef _DEBUG
|
||
|
|
current->DebugDump();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
unsigned short fieldSize = current->mSize;
|
||
|
|
|
||
|
|
// Temporarily convert the packet to net format (this saves alot of
|
||
|
|
// effort, and seems safe...)
|
||
|
|
current->Host_To_Net();
|
||
|
|
|
||
|
|
// Copy the adjusted header into the buffer and then advance the buffer
|
||
|
|
memcpy(curbuf, current, GAMERESFIELD_HEADER_SIZE);
|
||
|
|
curbuf += GAMERESFIELD_HEADER_SIZE;
|
||
|
|
|
||
|
|
// If this is the sig data then make a note of the offset into the packet.
|
||
|
|
if (sig_name && strncmp(sig_name, current->mID, 4) == 0)
|
||
|
|
{
|
||
|
|
// If sig_offset isn't zero then that would indicate that there were multiple sig entries in the packet.
|
||
|
|
assert(sig_offset == 0);
|
||
|
|
sig_offset = (curbuf - bufferStart);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Copy the data into the buffer and then advance the buffer
|
||
|
|
memcpy(curbuf, current->mData, fieldSize);
|
||
|
|
curbuf += fieldSize;
|
||
|
|
|
||
|
|
// Finally take care of any pad bytes by setting them to 0
|
||
|
|
int pad = ((4 - (fieldSize & 3)) & 3);
|
||
|
|
|
||
|
|
// If there is any pad left over, make sure you memset it
|
||
|
|
// to zeros, so it looks like a pad.
|
||
|
|
if (pad)
|
||
|
|
{
|
||
|
|
memset(curbuf, 0, pad);
|
||
|
|
curbuf += pad;
|
||
|
|
}
|
||
|
|
|
||
|
|
current->Net_To_Host();
|
||
|
|
}
|
||
|
|
|
||
|
|
return bufferStart;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GameResPacket::FIND_FIELD -- Finds a field if it exists in the packets *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field we are looking for. *
|
||
|
|
* *
|
||
|
|
* OUTPUT: GameResField * pointer to the field class *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
GameResField *GameResPacket::Find_Field(char *id)
|
||
|
|
{
|
||
|
|
for (GameResField *current = mHead; current; current = current->mNext)
|
||
|
|
{
|
||
|
|
if (strncmp(id, current->mID, 4) == 0)
|
||
|
|
return current;
|
||
|
|
}
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data. *
|
||
|
|
* char & - the reference to store the data into *
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The data reference is not changed if the field is not *
|
||
|
|
* found. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, char &data)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
data = *((char*)field->mData);
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data. *
|
||
|
|
* unsigned char & - the reference to store the data into *
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The data reference is not changed if the field is not *
|
||
|
|
* found. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, unsigned char &data)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
data = *((unsigned char *)field->mData);
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data. *
|
||
|
|
* short & - the reference to store the data into *
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The data reference is not changed if the field is not *
|
||
|
|
* found. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, short &data)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
data = *((short *)field->mData);
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data. *
|
||
|
|
* unsigned short & - the reference to store the data into*
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The data reference is not changed if the field is not *
|
||
|
|
* found. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, unsigned short &data)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
data = *((unsigned short *)field->mData);
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data. *
|
||
|
|
* long & - the reference to store the data into *
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The data reference is not changed if the field is not *
|
||
|
|
* found. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, long &data)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
data = *((long *)field->mData);
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data as a string *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data. *
|
||
|
|
* char * - the string to store the data into *
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The string is not changed if the field is not found. It *
|
||
|
|
* is assumed that the string variabled specified by the *
|
||
|
|
* pointer is large enough to hold the data. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, char *data)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
strcpy(data, (char *)field->mData);
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data *
|
||
|
|
* unsigned long & - the reference to store the data into *
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The data reference is not changed if the field is not *
|
||
|
|
* found. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 04/23/1996 PWG : Created. *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, unsigned long &data)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
data = *((unsigned long *)field->mData);
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
* GET_FIELD -- Find specified name and returns data *
|
||
|
|
* *
|
||
|
|
* INPUT: char * - the id of the field that holds the data. *
|
||
|
|
* void * - the reference to store the data into *
|
||
|
|
* int - the length of the buffer passed in *
|
||
|
|
* *
|
||
|
|
* OUTPUT: true if the field was found, false if it was not. *
|
||
|
|
* *
|
||
|
|
* WARNINGS: The data reference is not changed if the field is not *
|
||
|
|
* found. *
|
||
|
|
* *
|
||
|
|
* HISTORY: *
|
||
|
|
* 6/4/96 4:46PM ST : Created *
|
||
|
|
*========================================================================*/
|
||
|
|
bool GameResPacket::Get_Field(char *id, void *data, int &length)
|
||
|
|
{
|
||
|
|
GameResField *field = Find_Field(id);
|
||
|
|
|
||
|
|
if (field)
|
||
|
|
{
|
||
|
|
memcpy(data, field->mData, min((int)field->mSize, length));
|
||
|
|
length = (int) field->mSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
return((field) ? true : false);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace WWOnline
|