private void ReadPacket(Q3HuffmanStream stream)
{
List <string> cmdLog = new List <string> ();
PacketKind pktKind = stream.BeginRead();
this.reliableAcknowledge = stream.ReadInt32();
ServerCommandType cmd;
while (ServerCommandType.EOF != (cmd = ( ServerCommandType )stream.ReadByte()))
{
switch (cmd)
{
case ServerCommandType.Nop:
cmdLog.Add("Nop");
break;
case ServerCommandType.ServerCommand:
this.ParseCommandString(stream);
cmdLog.Add("ServerCommand");
break;
case ServerCommandType.GameState:
this.ParseGamestate(stream);
cmdLog.Add("GameState");
break;
case ServerCommandType.Snapshot:
this.ParseSnapshot(stream);
cmdLog.Add("Snapshot");
break;
case ServerCommandType.Download:
// We never download ;)
return;
default:
// Unknown command
return;
}
}
stream.EndRead();
}
private void ParseGamestate(Q3HuffmanStream stream)
{
this.gameState.Clear();
this.incomingCommandSequence = stream.ReadInt32();
EntityState nullstate = new EntityState();
ServerCommandType cmd;
entityBaselinesEvent.WaitOne();
while (ServerCommandType.EOF != (cmd = ( ServerCommandType )stream.ReadByte()))
{
switch (cmd)
{
case ServerCommandType.ConfigString:
int i = stream.ReadInt16();
gameState [i] = stream.ReadString();
break;
case ServerCommandType.BaseLine:
int newnum = stream.ReadBits(10);
ReadDeltaEntity(stream, nullstate, ref entityBaselines [newnum], newnum);
break;
default:
// Unknown command
break;
}
}
entityBaselinesEvent.Set();
this.clientNum = stream.ReadInt32();
this.checksumFeed = stream.ReadInt32();
SystemInfoChanged();
this.connState = ConnectionState.Primed;
//SendPureChecksums ();
}
private void ReadDeltaPlayerstate(Q3HuffmanStream stream, PlayerState from, ref PlayerState to)
{
int i;
if (from == null)
{
from = new PlayerState();
}
from.CopyTo(to);
int lc = stream.ReadByte();
NetField field;
int trunc;
for (i = 0, field = PlayerState.fields [i]; i < lc; i++)
{
field = PlayerState.fields [i];
if (stream.ReadBits(1) == 0)
{
// no change
KeyValueCoder.TrySetFieldValue(to, field.name,
KeyValueCoder.TryGetFieldValue(from, field.name));
}
else
{
if (field.bits == 0)
{
// float
if (stream.ReadBits(1) == 0)
{
// integral float
trunc = stream.ReadBits(NetField.FLOAT_INT_BITS);
// bias to allow equal parts positive and negative
trunc -= NetField.FLOAT_INT_BIAS;
KeyValueCoder.TrySetFieldValue(to, field.name, trunc);
}
else
{
// full floating point value
// FIXIT: wrong conversion from 32 bits to floating point value
KeyValueCoder.TrySetFieldValue(to, field.name, stream.ReadInt32());
}
}
else
{
// integer
KeyValueCoder.TrySetFieldValue(to, field.name, stream.ReadBits(( int )field.bits));
}
}
}
for (i = lc, field = PlayerState.fields [lc]; i < PlayerState.fields.Length; i++)
{
field = PlayerState.fields [i];
// no change
KeyValueCoder.TrySetFieldValue(to, field.name,
KeyValueCoder.TryGetFieldValue(from, field.name));
}
short bits;
// read the arrays
if (0 != stream.ReadBits(1))
{
// parse stats
if (0 != stream.ReadBits(1))
{
bits = stream.ReadInt16();
for (i = 0; i < 16; i++)
{
if (0 != (bits & (1 << i)))
{
to.stats [i] = stream.ReadInt16();
}
}
}
// parse persistant stats
if (0 != stream.ReadBits(1))
{
bits = stream.ReadInt16();
for (i = 0; i < 16; i++)
{
if (0 != (bits & (1 << i)))
{
to.persistant [i] = stream.ReadInt16();
}
}
}
// parse ammo
if (0 != stream.ReadBits(1))
{
bits = stream.ReadInt16();
for (i = 0; i < 16; i++)
{
if (0 != (bits & (1 << i)))
{
to.ammo [i] = stream.ReadInt16();
}
}
}
// parse powerups
if (0 != stream.ReadBits(1))
{
bits = stream.ReadInt16();
for (i = 0; i < 16; i++)
{
if (0 != (bits & (1 << i)))
{
to.powerups [i] = stream.ReadInt32();
}
}
}
}
}
private void ParseSnapshot(Q3HuffmanStream stream)
{
Snapshot old;
Snapshot newSnap = new Snapshot();
int deltaNum;
newSnap.serverCommandNum = this.incomingCommandSequence;
newSnap.serverTime = stream.ReadInt32();
newSnap.messageNum = this.incomingSequence;
if (0 == (deltaNum = stream.ReadByte()))
{
newSnap.deltaNum = -1;
}
else
{
newSnap.deltaNum = newSnap.messageNum - deltaNum;
}
newSnap.snapFlags = stream.ReadByte();
// If the frame is delta compressed from data that we
// no longer have available, we must suck up the rest of
// the frame, but not use it, then ask for a non-compressed
// message
if (newSnap.deltaNum <= 0)
{
newSnap.valid = true; // uncompressed frame
old = null;
//clc.demowaiting = false; // we can start recording now
}
else
{
old = this.snapshots [newSnap.deltaNum & PACKET_MASK];
if (!old.valid)
{
// should never happen
// "Delta from invalid frame (not supposed to happen!)"
}
else if (old.messageNum != newSnap.deltaNum)
{
// The frame that the server did the delta from
// is too old, so we can't reconstruct it properly.
// "Delta frame too old."
}
else if (parseEntitiesNum - old.parseEntitiesNum > MAX_PARSE_ENTITIES - 128)
{
// "Delta parseEntitiesNum too old."
}
else
{
newSnap.valid = true; // valid delta parse
}
}
// read areamask
int len = stream.ReadByte();
stream.Read(newSnap.areamask, 0, len);
// read playerinfo
if (old != null)
{
ReadDeltaPlayerstate(stream, old.ps, ref newSnap.ps);
}
else
{
ReadDeltaPlayerstate(stream, null, ref newSnap.ps);
}
// read packet entities
ParsePacketEntities(stream, old, newSnap);
// if not valid, dump the entire thing now that it has
// been properly read
if (!newSnap.valid)
{
return;
}
// clear the valid flags of any snapshots between the last
// received and this one, so if there was a dropped packet
// it won't look like something valid to delta from next
// time we wrap around in the buffer
int oldMessageNum = this.snap.messageNum + 1;
if (newSnap.messageNum - oldMessageNum >= PACKET_BACKUP)
{
oldMessageNum = newSnap.messageNum - (PACKET_BACKUP - 1);
}
for ( ; oldMessageNum < newSnap.messageNum; oldMessageNum++)
{
this.snapshots [oldMessageNum & PACKET_MASK].valid = false;
}
// copy to the current good spot
this.snap = newSnap;
this.snap.ping = 999;
// calculate ping time
for (int i = 0; i < PACKET_BACKUP; i++)
{
int packetNum = (this.outgoingSequence - 1 - i) & PACKET_MASK;
if (this.snap.ps.commandTime >= this.outPackets [packetNum].serverTime)
{
this.snap.ping = ( int )(DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond) - this.outPackets[packetNum].realtime;
break;
}
}
// save the frame off in the backup array for later delta comparisons
this.snapshots [this.snap.messageNum & PACKET_MASK] = this.snap;
this.newSnapshots = true;
}
private void ReadDeltaEntity(Q3HuffmanStream stream, EntityState from, ref EntityState to, int number)
{
// check for a remove
if (stream.ReadBits(1) == 1)
{
new EntityState().CopyTo(to);
to.number = MAX_GENTITIES - 1;
return;
}
// check for no delta
if (stream.ReadBits(1) == 0)
{
from.CopyTo(to);
to.number = number;
return;
}
int lc = stream.ReadByte();
to.number = number;
int i;
NetField field;
int trunc;
for (i = 0, field = EntityState.fields [i]; i < lc && i < EntityState.fields.Length; i++)
{
field = EntityState.fields [i];
if (stream.ReadBits(1) == 0)
{
// no change
KeyValueCoder.TrySetFieldValue(to, field.name,
KeyValueCoder.TryGetFieldValue(from, field.name));
}
else
{
if (field.bits == 0)
{
// float
if (stream.ReadBits(1) == 0)
{
KeyValueCoder.TrySetFieldValue(to, field.name, 0);
}
else
{
if (stream.ReadBits(1) == 0)
{
// integral float
trunc = stream.ReadBits(NetField.FLOAT_INT_BITS);
// bias to allow equal parts positive and negative
trunc -= NetField.FLOAT_INT_BIAS;
KeyValueCoder.TrySetFieldValue(to, field.name, trunc);
}
else
{
// full floating point value
// FIXIT: wrong conversion from 32 bits to floating point value
KeyValueCoder.TrySetFieldValue(to, field.name, stream.ReadInt32());
}
}
}
else
{
if (stream.ReadBits(1) == 0)
{
KeyValueCoder.TrySetFieldValue(to, field.name, 0);
}
else
{
// integer
KeyValueCoder.TrySetFieldValue(to, field.name, stream.ReadBits(( int )field.bits));
}
}
}
}
for (i = lc; i < EntityState.fields.Length; i++)
{
field = EntityState.fields [i];
// no change
KeyValueCoder.TrySetFieldValue(to, field.name,
KeyValueCoder.TryGetFieldValue(from, field.name));
}
}