159 lines
3.9 KiB
C++
159 lines
3.9 KiB
C++
|
|
#include "../game/q_shared.h"
|
|
#include "../qcommon/qcommon.h"
|
|
#include "server.h"
|
|
|
|
// TTimo: unused, commenting out to make gcc happy
|
|
#if 1
|
|
/*
|
|
==============
|
|
SV_Netchan_Encode
|
|
|
|
// first four bytes of the data are always:
|
|
long reliableAcknowledge;
|
|
|
|
==============
|
|
*/
|
|
static void SV_Netchan_Encode( client_t *client, msg_t *msg ) {
|
|
long reliableAcknowledge, i, index;
|
|
byte key, *string;
|
|
int srdc, sbit, soob;
|
|
|
|
if ( msg->cursize < SV_ENCODE_START ) {
|
|
return;
|
|
}
|
|
|
|
srdc = msg->readcount;
|
|
sbit = msg->bit;
|
|
soob = msg->oob;
|
|
|
|
msg->bit = 0;
|
|
msg->readcount = 0;
|
|
msg->oob = (qboolean)0;
|
|
|
|
reliableAcknowledge = MSG_ReadLong(msg);
|
|
|
|
msg->oob = (qboolean)soob;
|
|
msg->bit = sbit;
|
|
msg->readcount = srdc;
|
|
|
|
string = (byte *)client->lastClientCommandString;
|
|
index = 0;
|
|
// xor the client challenge with the netchan sequence number
|
|
key = client->challenge ^ client->netchan.outgoingSequence;
|
|
for (i = SV_ENCODE_START; i < msg->cursize; i++) {
|
|
// modify the key with the last received and with this message acknowledged client command
|
|
if (!string[index])
|
|
index = 0;
|
|
if (string[index] > 127 || string[index] == '%') {
|
|
key ^= '.' << (i & 1);
|
|
}
|
|
else {
|
|
key ^= string[index] << (i & 1);
|
|
}
|
|
index++;
|
|
// encode the data with this key
|
|
*(msg->data + i) = *(msg->data + i) ^ key;
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
SV_Netchan_Decode
|
|
|
|
// first 12 bytes of the data are always:
|
|
long serverId;
|
|
long messageAcknowledge;
|
|
long reliableAcknowledge;
|
|
|
|
==============
|
|
*/
|
|
static void SV_Netchan_Decode( client_t *client, msg_t *msg ) {
|
|
int serverId, messageAcknowledge, reliableAcknowledge;
|
|
int i, index, srdc, sbit, soob;
|
|
byte key, *string;
|
|
|
|
srdc = msg->readcount;
|
|
sbit = msg->bit;
|
|
soob = msg->oob;
|
|
|
|
msg->oob = (qboolean)0;
|
|
|
|
serverId = MSG_ReadLong(msg);
|
|
messageAcknowledge = MSG_ReadLong(msg);
|
|
reliableAcknowledge = MSG_ReadLong(msg);
|
|
|
|
msg->oob = (qboolean)soob;
|
|
msg->bit = sbit;
|
|
msg->readcount = srdc;
|
|
|
|
string = (byte *)client->reliableCommands[ reliableAcknowledge & (MAX_RELIABLE_COMMANDS-1) ];
|
|
index = 0;
|
|
//
|
|
key = client->challenge ^ serverId ^ messageAcknowledge;
|
|
for (i = msg->readcount + SV_DECODE_START; i < msg->cursize; i++) {
|
|
// modify the key with the last sent and acknowledged server command
|
|
if (!string[index])
|
|
index = 0;
|
|
if (string[index] > 127 || string[index] == '%') {
|
|
key ^= '.' << (i & 1);
|
|
}
|
|
else {
|
|
key ^= string[index] << (i & 1);
|
|
}
|
|
index++;
|
|
// decode the data with this key
|
|
*(msg->data + i) = *(msg->data + i) ^ key;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
=================
|
|
SV_Netchan_TransmitNextFragment
|
|
=================
|
|
*/
|
|
void SV_Netchan_TransmitNextFragment( netchan_t *chan ) {
|
|
Netchan_TransmitNextFragment( chan );
|
|
}
|
|
|
|
|
|
/*
|
|
===============
|
|
SV_Netchan_Transmit
|
|
================
|
|
*/
|
|
|
|
//extern byte chksum[65536];
|
|
void SV_Netchan_Transmit( client_t *client, msg_t *msg) { //int length, const byte *data ) {
|
|
// int i;
|
|
MSG_WriteByte( msg, svc_EOF );
|
|
// for(i=SV_ENCODE_START;i<msg->cursize;i++) {
|
|
// chksum[i-SV_ENCODE_START] = msg->data[i];
|
|
// }
|
|
// Huff_Compress( msg, SV_ENCODE_START );
|
|
SV_Netchan_Encode( client, msg );
|
|
Netchan_Transmit( &client->netchan, msg->cursize, msg->data );
|
|
}
|
|
|
|
/*
|
|
=================
|
|
Netchan_SV_Process
|
|
=================
|
|
*/
|
|
qboolean SV_Netchan_Process( client_t *client, msg_t *msg ) {
|
|
int ret;
|
|
// int i;
|
|
ret = Netchan_Process( &client->netchan, msg );
|
|
if (!ret)
|
|
return qfalse;
|
|
SV_Netchan_Decode( client, msg );
|
|
// Huff_Decompress( msg, SV_DECODE_START );
|
|
// for(i=SV_DECODE_START+msg->readcount;i<msg->cursize;i++) {
|
|
// if (msg->data[i] != chksum[i-(SV_DECODE_START+msg->readcount)]) {
|
|
// Com_Error(ERR_DROP,"bad\n");
|
|
// }
|
|
// }
|
|
return qtrue;
|
|
}
|
|
|