void CL_WriteUsercmd( sizebuf_t *msg, int from, int to )
{
usercmd_t nullcmd;
usercmd_t *f, *t;
ASSERT( from == -1 || ( from >= 0 && from < MULTIPLAYER_BACKUP ));
ASSERT( to >= 0 && to < MULTIPLAYER_BACKUP );
if( from == -1 )
{
Q_memset( &nullcmd, 0, sizeof( nullcmd ));
f = &nullcmd;
}
else
{
f = &cl.cmds[from];
}
t = &cl.cmds[to];
// write it into the buffer
MSG_WriteDeltaUsercmd( msg, f, t );
}
/*
* CL_WriteUcmdsToMessage
*/
void CL_WriteUcmdsToMessage( msg_t *msg )
{
usercmd_t *cmd;
usercmd_t *oldcmd;
usercmd_t nullcmd;
unsigned int resendCount;
unsigned int i;
unsigned int ucmdFirst;
unsigned int ucmdHead;
if( !msg || cls.state < CA_ACTIVE || cls.demo.playing )
return;
// find out what ucmds we have to send
ucmdFirst = cls.ucmdAcknowledged + 1;
ucmdHead = cl.cmdNum + 1;
if( cl_ucmdMaxResend->integer > CMD_BACKUP * 0.5 )
Cvar_SetValue( "cl_ucmdMaxResend", CMD_BACKUP * 0.5 );
else if( cl_ucmdMaxResend->integer < 1 )
Cvar_SetValue( "cl_ucmdMaxResend", 1 );
// find what is our resend count (resend doesn't include the newly generated ucmds)
// and move the start back to the resend start
if( ucmdFirst <= cls.ucmdSent + 1 )
resendCount = 0;
else
resendCount = ( cls.ucmdSent + 1 ) - ucmdFirst;
if( resendCount > (unsigned int)cl_ucmdMaxResend->integer )
resendCount = (unsigned int)cl_ucmdMaxResend->integer;
if( ucmdFirst > ucmdHead )
ucmdFirst = ucmdHead;
// if this happens, the player is in a freezing lag. Send him the less possible data
if( ( ucmdHead - ucmdFirst ) + resendCount > CMD_MASK * 0.5 )
resendCount = 0;
// move the start backwards to the resend point
ucmdFirst = ( ucmdFirst > resendCount ) ? ucmdFirst - resendCount : ucmdFirst;
if( ( ucmdHead - ucmdFirst ) > CMD_MASK ) // ran out of updates, seduce the send to try to recover activity
ucmdFirst = ucmdHead - 3;
// begin a client move command
MSG_WriteByte( msg, clc_move );
// (acknowledge server frame snap)
// let the server know what the last frame we
// got was, so the next message can be delta compressed
if( cl.receivedSnapNum <= 0 )
MSG_WriteLong( msg, -1 );
else
MSG_WriteLong( msg, cl.snapShots[cl.receivedSnapNum & UPDATE_MASK].serverFrame );
// Write the actual ucmds
// write the id number of first ucmd to be sent, and the count
MSG_WriteLong( msg, ucmdHead );
MSG_WriteByte( msg, (uint8_t)( ucmdHead - ucmdFirst ) );
// write the ucmds
for( i = ucmdFirst; i < ucmdHead; i++ )
{
if( i == ucmdFirst ) // first one isn't delta-compressed
{
cmd = &cl.cmds[i & CMD_MASK];
memset( &nullcmd, 0, sizeof( nullcmd ) );
MSG_WriteDeltaUsercmd( msg, &nullcmd, cmd );
}
else // delta compress to previous written
{
cmd = &cl.cmds[i & CMD_MASK];
oldcmd = &cl.cmds[( i-1 ) & CMD_MASK];
MSG_WriteDeltaUsercmd( msg, oldcmd, cmd );
}
}
cls.ucmdSent = i;
}
void CL_SendCmd (void)
{
sizebuf_t buf;
byte data[128];
usercmd_t *cmd, *oldcmd;
int i, checksumIndex, lost;
qbool dontdrop;
static float pps_balance = 0;
static int dropcount = 0;
if (cls.demoplayback && !cls.mvdplayback)
return; // sendcmds come from the demo
#ifdef FTE_PEXT_CHUNKEDDOWNLOADS
CL_SendChunkDownloadReq();
#endif
// save this command off for prediction
i = cls.netchan.outgoing_sequence & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
cl.frames[i].senttime = cls.realtime;
cl.frames[i].receivedtime = -1; // we haven't gotten a reply yet
// update network stats table
i = cls.netchan.outgoing_sequence&NETWORK_STATS_MASK;
network_stats[i].delta = 0; // filled-in later
network_stats[i].sentsize = 0; // filled-in later
network_stats[i].senttime = cls.realtime;
network_stats[i].receivedtime = -1;
// get basic movement from keyboard
CL_BaseMove (cmd);
// allow mice or other external controllers to add to the move
if (cl_independentPhysics.value == 0 || (physframe && cl_independentPhysics.value != 0))
{
IN_Move(cmd);
}
// if we are spectator, try autocam
if (cl.spectator)
Cam_Track(cmd);
CL_FinishMove(cmd);
cmdtime_msec += cmd->msec;
Cam_FinishMove(cmd);
if (cls.mvdplayback)
{
CL_CalcPlayerFPS(&cl.players[cl.playernum], cmd->msec);
cls.netchan.outgoing_sequence++;
return;
}
SZ_Init (&buf, data, sizeof(data));
SZ_Write (&buf, cls.cmdmsg.data, cls.cmdmsg.cursize);
if (cls.cmdmsg.overflowed)
Com_DPrintf("cls.cmdmsg overflowed\n");
SZ_Clear (&cls.cmdmsg);
// begin a client move command
MSG_WriteByte (&buf, clc_move);
// save the position for a checksum byte
checksumIndex = buf.cursize;
MSG_WriteByte (&buf, 0);
// write our lossage percentage
lost = CL_CalcNet();
MSG_WriteByte (&buf, (byte)lost);
// send this and the previous two cmds in the message, so if the last packet was dropped, it can be recovered
dontdrop = false;
i = (cls.netchan.outgoing_sequence - 2) & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
if (cl_c2sImpulseBackup.value >= 2)
dontdrop = dontdrop || cmd->impulse;
MSG_WriteDeltaUsercmd (&buf, &nullcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence - 1) & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
if (cl_c2sImpulseBackup.value >= 3)
dontdrop = dontdrop || cmd->impulse;
MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence) & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
if (cl_c2sImpulseBackup.value >= 1)
dontdrop = dontdrop || cmd->impulse;
MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
// calculate a checksum over the move commands
buf.data[checksumIndex] = COM_BlockSequenceCRCByte(
buf.data + checksumIndex + 1, buf.cursize - checksumIndex - 1,
cls.netchan.outgoing_sequence);
// request delta compression of entities
if (cls.netchan.outgoing_sequence - cl.validsequence >= UPDATE_BACKUP - 1)
{
cl.validsequence = 0;
cl.delta_sequence = 0;
}
if (cl.delta_sequence && !cl_nodelta.value && cls.state == ca_active)
{
cl.frames[cls.netchan.outgoing_sequence & UPDATE_MASK].delta_sequence = cl.delta_sequence;
MSG_WriteByte (&buf, clc_delta);
MSG_WriteByte (&buf, cl.delta_sequence & 255);
// network stats table
network_stats[cls.netchan.outgoing_sequence&NETWORK_STATS_MASK].delta = 1;
}
else
{
cl.frames[cls.netchan.outgoing_sequence & UPDATE_MASK].delta_sequence = -1;
}
if (cls.demorecording)
CL_WriteDemoCmd (cmd);
if (cl_c2spps.value)
{
pps_balance += cls.frametime;
// never drop more than 2 messages in a row -- that'll cause PL
// and don't drop if one of the last two movemessages have an impulse
if (pps_balance > 0 || dropcount >= 2 || dontdrop)
{
float pps;
pps = cl_c2spps.value;
if (pps < 10) pps = 10;
if (pps > 72) pps = 72;
pps_balance -= 1 / pps;
// bound pps_balance. FIXME: is there a better way?
if (pps_balance > 0.1) pps_balance = 0.1;
if (pps_balance < -0.1) pps_balance = -0.1;
dropcount = 0;
}
else
{
// don't count this message when calculating PL
cl.frames[i].receivedtime = -3;
// drop this message
cls.netchan.outgoing_sequence++;
dropcount++;
return;
}
}
else
{
pps_balance = 0;
dropcount = 0;
}
#ifdef FTE_PEXT2_VOICECHAT
S_Voip_Transmit(clc_voicechat, &buf);
#endif
cl.frames[cls.netchan.outgoing_sequence&UPDATE_MASK].sentsize = buf.cursize + 8; // 8 = PACKET_HEADER
// network stats table
network_stats[cls.netchan.outgoing_sequence&NETWORK_STATS_MASK].sentsize = buf.cursize + 8;
// deliver the message
Netchan_Transmit (&cls.netchan, buf.cursize, buf.data);
}
/*
===================
CL_WritePacket
Create and send the command packet to the server
Including both the reliable commands and the usercmds
During normal gameplay, a client packet will contain something like:
4 sequence number
2 qport
4 serverid
4 acknowledged sequence number
4 clc.serverCommandSequence
<optional reliable commands>
1 clc_move or clc_moveNoDelta
1 command count
<count * usercmds>
===================
*/
void CL_WritePacket( void ) {
msg_t buf;
byte data[MAX_MSGLEN];
int i, j;
usercmd_t *cmd, *oldcmd;
usercmd_t nullcmd;
int packetNum;
int oldPacketNum;
int count;
// don't send anything if playing back a demo
// if ( cls.state == CA_CINEMATIC )
if ( cls.state == CA_CINEMATIC || CL_IsRunningInGameCinematic())
{
return;
}
MSG_Init( &buf, data, sizeof(data) );
// write any unacknowledged clientCommands
for ( i = clc.reliableAcknowledge + 1 ; i <= clc.reliableSequence ; i++ ) {
MSG_WriteByte( &buf, clc_clientCommand );
MSG_WriteLong( &buf, i );
MSG_WriteString( &buf, clc.reliableCommands[ i & (MAX_RELIABLE_COMMANDS-1) ] );
}
// we want to send all the usercmds that were generated in the last
// few packet, so even if a couple packets are dropped in a row,
// all the cmds will make it to the server
if ( cl_packetdup->integer < 0 ) {
Cvar_Set( "cl_packetdup", "0" );
} else if ( cl_packetdup->integer > 5 ) {
Cvar_Set( "cl_packetdup", "5" );
}
oldPacketNum = (clc.netchan.outgoingSequence - 1 - cl_packetdup->integer) & PACKET_MASK;
count = cl.cmdNumber - cl.packetCmdNumber[ oldPacketNum ];
if ( count > MAX_PACKET_USERCMDS ) {
count = MAX_PACKET_USERCMDS;
Com_Printf("MAX_PACKET_USERCMDS\n");
}
if ( count >= 1 ) {
// begin a client move command
MSG_WriteByte (&buf, clc_move);
// write the last reliable message we received
MSG_WriteLong( &buf, clc.serverCommandSequence );
// write the current serverId so the server
// can tell if this is from the current gameState
MSG_WriteLong (&buf, cl.serverId);
// write the current time
MSG_WriteLong (&buf, cls.realtime);
// let the server know what the last messagenum we
// got was, so the next message can be delta compressed
// FIXME: this could just be a bit flag, with the message implicit
// from the unreliable ack of the netchan
if (cl_nodelta->integer || !cl.frame.valid) {
MSG_WriteLong (&buf, -1); // no compression
} else {
MSG_WriteLong (&buf, cl.frame.messageNum);
}
// write the cmdNumber so the server can determine which ones it
// has already received
MSG_WriteLong( &buf, cl.cmdNumber );
// write the command count
MSG_WriteByte( &buf, count );
// write all the commands, including the predicted command
memset( &nullcmd, 0, sizeof(nullcmd) );
oldcmd = &nullcmd;
for ( i = 0 ; i < count ; i++ ) {
j = (cl.cmdNumber - count + i + 1) & CMD_MASK;
cmd = &cl.cmds[j];
MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
oldcmd = cmd;
}
}
//
// deliver the message
//
packetNum = clc.netchan.outgoingSequence & PACKET_MASK;
cl.packetTime[ packetNum ] = cls.realtime;
cl.packetCmdNumber[ packetNum ] = cl.cmdNumber;
clc.lastPacketSentTime = cls.realtime;
Netchan_Transmit (&clc.netchan, buf.cursize, buf.data);
}
/*
=================
CL_SendCmd
=================
*/
void CL_SendCmd (void)
{
sizebuf_t buf;
byte data[128];
int i;
usercmd_t *cmd, *oldcmd;
usercmd_t nullcmd;
int checksumIndex;
// clear buffer
memset (&buf, 0, sizeof(buf));
// build a command even if not connected
// save this command off for prediction
i = cls.netchan.outgoing_sequence & (CMD_BACKUP-1);
cmd = &cl.cmds[i];
cl.cmd_time[i] = cls.realtime; // for netgraph ping calculation
*cmd = CL_CreateCmd ();
cl.cmd = *cmd;
if (cls.state == ca_disconnected || cls.state == ca_connecting)
return;
if (cls.state == ca_connected)
{
if (cls.netchan.message.cursize || curtime - cls.netchan.last_sent > 1000 )
Netchan_Transmit (&cls.netchan, 0, buf.data);
return;
}
// send a userinfo update if needed
if (userinfo_modified)
{
CL_FixUpGender();
userinfo_modified = false;
MSG_WriteByte (&cls.netchan.message, clc_userinfo);
MSG_WriteString (&cls.netchan.message, Cvar_Userinfo() );
}
SZ_Init (&buf, data, sizeof(data));
// Knightmare- removed this, put ESC-only substitute in keys.c
/*if (cmd->buttons && cl.cinematictime > 0 && !cl.attractloop
&& cls.realtime - cl.cinematictime > 1000)
{ // skip the rest of the cinematic
SCR_FinishCinematic ();
}*/
// begin a client move command
MSG_WriteByte (&buf, clc_move);
// save the position for a checksum byte
checksumIndex = buf.cursize;
MSG_WriteByte (&buf, 0);
// let the server know what the last frame we
// got was, so the next message can be delta compressed
if (cl_nodelta->value || !cl.frame.valid || cls.demowaiting)
MSG_WriteLong (&buf, -1); // no compression
else
MSG_WriteLong (&buf, cl.frame.serverframe);
// send this and the previous cmds in the message, so
// if the last packet was dropped, it can be recovered
i = (cls.netchan.outgoing_sequence-2) & (CMD_BACKUP-1);
cmd = &cl.cmds[i];
memset (&nullcmd, 0, sizeof(nullcmd));
MSG_WriteDeltaUsercmd (&buf, &nullcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence-1) & (CMD_BACKUP-1);
cmd = &cl.cmds[i];
MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence) & (CMD_BACKUP-1);
cmd = &cl.cmds[i];
MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
// calculate a checksum over the move commands
buf.data[checksumIndex] = COM_BlockSequenceCRCByte(
buf.data + checksumIndex + 1, buf.cursize - checksumIndex - 1,
cls.netchan.outgoing_sequence);
//
// deliver the message
//
Netchan_Transmit (&cls.netchan, buf.cursize, buf.data);
}
/*
=================
CL_SendDefaultCmd
=================
*/
static void CL_SendDefaultCmd( void ) {
size_t cursize, checksumIndex;
usercmd_t *cmd, *oldcmd;
client_history_t *history;
// archive this packet
history = &cl.history[cls.netchan->outgoing_sequence & CMD_MASK];
history->cmdNumber = cl.cmdNumber;
history->sent = cls.realtime; // for ping calculation
history->rcvd = 0;
cl.lastTransmitCmdNumber = cl.cmdNumber;
// see if we are ready to send this packet
if( !ready_to_send_hacked() ) {
cls.netchan->outgoing_sequence++; // just drop the packet
return;
}
cl.lastTransmitTime = cls.realtime;
cl.lastTransmitCmdNumberReal = cl.cmdNumber;
// begin a client move command
MSG_WriteByte( clc_move );
// save the position for a checksum byte
checksumIndex = 0;
if( cls.serverProtocol <= PROTOCOL_VERSION_DEFAULT ) {
checksumIndex = msg_write.cursize;
SZ_GetSpace( &msg_write, 1 );
}
// let the server know what the last frame we
// got was, so the next message can be delta compressed
if( cl_nodelta->integer || !cl.frame.valid /*|| cls.demowaiting*/ ) {
MSG_WriteLong( -1 ); // no compression
} else {
MSG_WriteLong( cl.frame.number );
}
// send this and the previous cmds in the message, so
// if the last packet was dropped, it can be recovered
cmd = &cl.cmds[( cl.cmdNumber - 2 ) & CMD_MASK];
MSG_WriteDeltaUsercmd( NULL, cmd, cls.protocolVersion );
MSG_WriteByte( cl.lightlevel );
oldcmd = cmd;
cmd = &cl.cmds[( cl.cmdNumber - 1 ) & CMD_MASK];
MSG_WriteDeltaUsercmd( oldcmd, cmd, cls.protocolVersion );
MSG_WriteByte( cl.lightlevel );
oldcmd = cmd;
cmd = &cl.cmds[cl.cmdNumber & CMD_MASK];
MSG_WriteDeltaUsercmd( oldcmd, cmd, cls.protocolVersion );
MSG_WriteByte( cl.lightlevel );
if( cls.serverProtocol <= PROTOCOL_VERSION_DEFAULT ) {
// calculate a checksum over the move commands
msg_write.data[checksumIndex] = COM_BlockSequenceCRCByte(
msg_write.data + checksumIndex + 1,
msg_write.cursize - checksumIndex - 1,
cls.netchan->outgoing_sequence );
}
P_FRAMES++;
//
// deliver the message
//
cursize = cls.netchan->Transmit( cls.netchan, msg_write.cursize, msg_write.data, 1 );
#ifdef _DEBUG
if( cl_showpackets->integer ) {
Com_Printf( "%"PRIz" ", cursize );
}
#endif
SZ_Clear( &msg_write );
}
/*
=================
CL_SendCmd
=================
*/
void CL_SendCmd (void)
{
sizebuf_t buf;
byte data[128];
int i;
usercmd_t *cmd, *oldcmd;
int checksumIndex;
int lost;
int seq_hash;
if (cls.demoplayback)
return; // sendcmds come from the demo
// save this command off for prediction
i = cls.netchan.outgoing_sequence & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
cl.frames[i].senttime = realtime;
cl.frames[i].receivedtime = -1; // we haven't gotten a reply yet
// seq_hash = (cls.netchan.outgoing_sequence & 0xffff) ; // ^ QW_CHECK_HASH;
seq_hash = cls.netchan.outgoing_sequence;
// get basic movement from keyboard
CL_BaseMove (cmd);
// allow mice or other external controllers to add to the move
IN_Move (cmd);
// if we are spectator, try autocam
if (cl.spectator)
Cam_Track(cmd);
CL_FinishMove(cmd);
Cam_FinishMove(cmd);
// send this and the previous cmds in the message, so
// if the last packet was dropped, it can be recovered
buf.maxsize = 128;
buf.cursize = 0;
buf.data = data;
MSG_WriteByte (&buf, clc_move);
// save the position for a checksum byte
checksumIndex = buf.cursize;
MSG_WriteByte (&buf, 0);
// write our lossage percentage
lost = CL_CalcNet();
MSG_WriteByte (&buf, (byte)lost);
i = (cls.netchan.outgoing_sequence-2) & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
MSG_WriteDeltaUsercmd (&buf, &nullcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence-1) & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence) & UPDATE_MASK;
cmd = &cl.frames[i].cmd;
MSG_WriteDeltaUsercmd (&buf, oldcmd, cmd);
// calculate a checksum over the move commands
buf.data[checksumIndex] = COM_BlockSequenceCRCByte(
buf.data + checksumIndex + 1, buf.cursize - checksumIndex - 1,
seq_hash);
// request delta compression of entities
if (cls.netchan.outgoing_sequence - cl.validsequence >= UPDATE_BACKUP-1)
cl.validsequence = 0;
if (cl.validsequence && !cl_nodelta.value && cls.state == ca_active &&
!cls.demorecording)
{
cl.frames[cls.netchan.outgoing_sequence&UPDATE_MASK].delta_sequence = cl.validsequence;
MSG_WriteByte (&buf, clc_delta);
MSG_WriteByte (&buf, cl.validsequence&255);
}
else
cl.frames[cls.netchan.outgoing_sequence&UPDATE_MASK].delta_sequence = -1;
if (cls.demorecording)
CL_WriteDemoCmd(cmd);
//
// deliver the message
//
Netchan_Transmit (&cls.netchan, buf.cursize, buf.data);
}
void CL_SendCmd(void)
{
sizebuf_t buf;
byte data[128];
int i;
usercmd_t *cmd, *oldcmd;
usercmd_t nullcmd;
int checksumIndex;
memset(&buf, 0, sizeof(buf));
/* save this command off for prediction */
i = cls.netchan.outgoing_sequence & (CMD_BACKUP - 1);
cmd = &cl.cmds[i];
cl.cmd_time[i] = cls.realtime; /* for netgraph ping calculation */
CL_FinalizeCmd();
cl.cmd = *cmd;
if ((cls.state == ca_disconnected) || (cls.state == ca_connecting)) {
return;
}
if (cls.state == ca_connected) {
if (cls.netchan.message.cursize || (curtime - cls.netchan.last_sent > 1000)) {
Netchan_Transmit(&cls.netchan, 0, buf.data);
}
return;
}
/* send a userinfo update if needed */
if (userinfo_modified) {
CL_FixUpGender();
userinfo_modified = false;
MSG_WriteByte(&cls.netchan.message, clc_userinfo);
MSG_WriteString(&cls.netchan.message, Cvar_Userinfo());
}
SZ_Init(&buf, data, sizeof(data));
/* begin a client move command */
MSG_WriteByte(&buf, clc_move);
/* save the position for a checksum byte */
checksumIndex = buf.cursize;
MSG_WriteByte(&buf, 0);
/* let the server know what the last frame we
got was, so the next message can be delta
compressed */
if (cl_nodelta->value || !cl.frame.valid) {
MSG_WriteLong(&buf, -1); /* no compression */
} else {
MSG_WriteLong(&buf, cl.frame.serverframe);
}
/* send this and the previous cmds in the message, so
if the last packet was dropped, it can be recovered */
i = (cls.netchan.outgoing_sequence - 2) & (CMD_BACKUP - 1);
cmd = &cl.cmds[i];
memset(&nullcmd, 0, sizeof(nullcmd));
MSG_WriteDeltaUsercmd(&buf, &nullcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence - 1) & (CMD_BACKUP - 1);
cmd = &cl.cmds[i];
MSG_WriteDeltaUsercmd(&buf, oldcmd, cmd);
oldcmd = cmd;
i = (cls.netchan.outgoing_sequence) & (CMD_BACKUP - 1);
cmd = &cl.cmds[i];
MSG_WriteDeltaUsercmd(&buf, oldcmd, cmd);
/* calculate a checksum over the move commands */
buf.data[checksumIndex] = COM_BlockSequenceCRCByte(buf.data + checksumIndex + 1, buf.cursize - checksumIndex - 1,
cls.netchan.outgoing_sequence);
/* deliver the message */
Netchan_Transmit(&cls.netchan, buf.cursize, buf.data);
/* Reinit the current cmd buffer */
cmd = &cl.cmds[cls.netchan.outgoing_sequence & (CMD_BACKUP - 1)];
memset(cmd, 0, sizeof(*cmd));
}
/*
===================
CL_WritePacket
Create and send the command packet to the server
Including both the reliable commands and the usercmds
A client packet will contain something like:
4 sequence number
2 qport
4 serverid
4 acknowledged sequence number
4 clc.serverCommandSequence
<optional reliable commands>
1 clc_move or clc_moveNoDelta
1 command count
<count * usercmds>
===================
*/
void CL_WritePacket()
{
msg_t buf;
byte data[ MAX_MSGLEN ];
int i, j;
usercmd_t *cmd, *oldcmd;
usercmd_t nullcmd;
int packetNum;
int oldPacketNum;
int count;
// don't send anything if playing back a demo
if ( clc.demoplaying || cls.state == CA_CINEMATIC )
{
return;
}
memset( &nullcmd, 0, sizeof( nullcmd ) );
oldcmd = &nullcmd;
MSG_Init( &buf, data, sizeof( data ) );
MSG_Bitstream( &buf );
// write the current serverId so the server
// can tell if this is from the current gameState
MSG_WriteLong( &buf, cl.serverId );
// write the last message we received, which can
// be used for delta compression, and is also used
// to tell if we dropped a gamestate
MSG_WriteLong( &buf, clc.serverMessageSequence );
// write the last reliable message we received
MSG_WriteLong( &buf, clc.serverCommandSequence );
// write any unacknowledged clientCommands
// NOTE TTimo: if you verbose this, you will see that there are quite a few duplicates
// typically several unacknowledged cp or userinfo commands stacked up
for ( i = clc.reliableAcknowledge + 1; i <= clc.reliableSequence; i++ )
{
MSG_WriteByte( &buf, clc_clientCommand );
MSG_WriteLong( &buf, i );
MSG_WriteString( &buf, clc.reliableCommands[ i & ( MAX_RELIABLE_COMMANDS - 1 ) ] );
}
// we want to send all the usercmds that were generated in the last
// few packet, so even if a couple packets are dropped in a row,
// all the cmds will make it to the server
if ( cl_packetdup->integer < 0 )
{
Cvar_Set( "cl_packetdup", "0" );
}
else if ( cl_packetdup->integer > 5 )
{
Cvar_Set( "cl_packetdup", "5" );
}
oldPacketNum = ( clc.netchan.outgoingSequence - 1 - cl_packetdup->integer ) & PACKET_MASK;
count = cl.cmdNumber - cl.outPackets[ oldPacketNum ].p_cmdNumber;
if ( count > MAX_PACKET_USERCMDS )
{
count = MAX_PACKET_USERCMDS;
Com_Printf( "MAX_PACKET_USERCMDS" );
}
#ifdef USE_VOIP
if ( clc.voipOutgoingDataSize > 0 )
{
if ( ( clc.voipFlags & VOIP_SPATIAL ) || Com_IsVoipTarget( clc.voipTargets, sizeof( clc.voipTargets ), -1 ) )
{
MSG_WriteByte( &buf, clc_voip );
MSG_WriteByte( &buf, clc.voipOutgoingGeneration );
MSG_WriteLong( &buf, clc.voipOutgoingSequence );
MSG_WriteByte( &buf, clc.voipOutgoingDataFrames );
MSG_WriteData( &buf, clc.voipTargets, sizeof( clc.voipTargets ) );
MSG_WriteByte( &buf, clc.voipFlags );
MSG_WriteShort( &buf, clc.voipOutgoingDataSize );
MSG_WriteData( &buf, clc.voipOutgoingData, clc.voipOutgoingDataSize );
// If we're recording a demo, we have to fake a server packet with
// this VoIP data so it gets to disk; the server doesn't send it
// back to us, and we might as well eliminate concerns about dropped
// and misordered packets here.
if ( clc.demorecording && !clc.demowaiting )
{
const int voipSize = clc.voipOutgoingDataSize;
msg_t fakemsg;
byte fakedata[ MAX_MSGLEN ];
MSG_Init( &fakemsg, fakedata, sizeof( fakedata ) );
MSG_Bitstream( &fakemsg );
MSG_WriteLong( &fakemsg, clc.reliableAcknowledge );
MSG_WriteByte( &fakemsg, svc_voip );
MSG_WriteShort( &fakemsg, clc.clientNum );
MSG_WriteByte( &fakemsg, clc.voipOutgoingGeneration );
MSG_WriteLong( &fakemsg, clc.voipOutgoingSequence );
MSG_WriteByte( &fakemsg, clc.voipOutgoingDataFrames );
MSG_WriteShort( &fakemsg, clc.voipOutgoingDataSize );
MSG_WriteBits( &fakemsg, clc.voipFlags, VOIP_FLAGCNT );
MSG_WriteData( &fakemsg, clc.voipOutgoingData, voipSize );
MSG_WriteByte( &fakemsg, svc_EOF );
CL_WriteDemoMessage( &fakemsg, 0 );
}
clc.voipOutgoingSequence += clc.voipOutgoingDataFrames;
clc.voipOutgoingDataSize = 0;
clc.voipOutgoingDataFrames = 0;
}
else
{
// We have data, but no targets. Silently discard all data
clc.voipOutgoingDataSize = 0;
clc.voipOutgoingDataFrames = 0;
}
}
#endif
if ( count >= 1 )
{
if ( cl_showSend->integer )
{
Com_Printf( "(%i)", count );
}
// begin a client move command
if ( cl_nodelta->integer || !cl.snap.valid || clc.demowaiting || clc.serverMessageSequence != cl.snap.messageNum )
{
MSG_WriteByte( &buf, clc_moveNoDelta );
}
else
{
MSG_WriteByte( &buf, clc_move );
}
// write the command count
MSG_WriteByte( &buf, count );
// write all the commands, including the predicted command
for ( i = 0; i < count; i++ )
{
j = ( cl.cmdNumber - count + i + 1 ) & CMD_MASK;
cmd = &cl.cmds[ j ];
MSG_WriteDeltaUsercmd( &buf, oldcmd, cmd );
oldcmd = cmd;
}
}
//
// deliver the message
//
packetNum = clc.netchan.outgoingSequence & PACKET_MASK;
cl.outPackets[ packetNum ].p_realtime = cls.realtime;
cl.outPackets[ packetNum ].p_serverTime = oldcmd->serverTime;
cl.outPackets[ packetNum ].p_cmdNumber = cl.cmdNumber;
clc.lastPacketSentTime = cls.realtime;
if ( cl_showSend->integer )
{
Com_Printf("%i ", buf.cursize );
}
MSG_WriteByte( &buf, clc_EOF );
CL_WriteBinaryMessage( &buf );
Netchan_Transmit( &clc.netchan, buf.cursize, buf.data );
// clients never really should have messages large enough
// to fragment, but in case they do, fire them all off
// at once
// TTimo: this causes a packet burst, which is bad karma for winsock
// added a WARNING message, we'll see if there are legit situations where this happens
while ( clc.netchan.unsentFragments )
{
if ( cl_showSend->integer )
{
Com_Printf( "WARNING: unsent fragments (not supposed to happen!)" );
}
Netchan_TransmitNextFragment( &clc.netchan );
}
}