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- Improve snapshot rate and data rate control

Browse source 
- Make server send packet fragments and queued packets when server is idle
- Voip protocol detection is tied to com_protocol making past-end-of-message reading unncessary
- Use Hunk_AllocateTempMemory() for buffering VOIP packets and fix buffering scheme that ryan hates so much
- Disable packet scrambling for new protocol as it is useless now
- Get rid of the old packet scrambling functions predating latest point release
- Use Hunk_AllocateTempMemory() for netchan packet queue to fix memory leak when client gets disconnected with packets in the queue
- Use Hunk_AllocateTempMemory() for download blocks to fix memory leak when client gets disconnected with download blocks in the queue
- Fix SV_RateMsec to account for udp/udp6 packet lengths
This commit is contained in:
Thilo Schulz 2011-07-13 17:11:30 +00:00
parent a844c94af1
commit ac30d86db0
15 changed files with 345 additions and 356 deletions
Download patch file Download diff file Expand all files Collapse all files

96
code/qcommon/net_chan.c
View file

@ -99,92 +99,6 @@ void Netchan_Setup(netsrc_t sock, netchan_t *chan, netadr_t adr, int qport, int
#endif
}
// TTimo: unused, commenting out to make gcc happy
#if 0
/*
==============
Netchan_ScramblePacket
A probably futile attempt to make proxy hacking somewhat
more difficult.
==============
*/
#define SCRAMBLE_START 6
static void Netchan_ScramblePacket( msg_t *buf ) {
unsigned seed;
int i, j, c, mask, temp;
int seq[MAX_PACKETLEN];
seed = ( LittleLong( *(unsigned *)buf->data ) * 3 ) ^ ( buf->cursize * 123 );
c = buf->cursize;
if ( c <= SCRAMBLE_START ) {
return;
}
if ( c > MAX_PACKETLEN ) {
Com_Error( ERR_DROP, "MAX_PACKETLEN" );
}
// generate a sequence of "random" numbers
for (i = 0 ; i < c ; i++) {
seed = (119 * seed + 1);
seq[i] = seed;
}
// transpose each character
for ( mask = 1 ; mask < c-SCRAMBLE_START ; mask = ( mask << 1 ) + 1 ) {
}
mask >>= 1;
for (i = SCRAMBLE_START ; i < c ; i++) {
j = SCRAMBLE_START + ( seq[i] & mask );
temp = buf->data[j];
buf->data[j] = buf->data[i];
buf->data[i] = temp;
}
// byte xor the data after the header
for (i = SCRAMBLE_START ; i < c ; i++) {
buf->data[i] ^= seq[i];
}
}
static void Netchan_UnScramblePacket( msg_t *buf ) {
unsigned seed;
int i, j, c, mask, temp;
int seq[MAX_PACKETLEN];
seed = ( LittleLong( *(unsigned *)buf->data ) * 3 ) ^ ( buf->cursize * 123 );
c = buf->cursize;
if ( c <= SCRAMBLE_START ) {
return;
}
if ( c > MAX_PACKETLEN ) {
Com_Error( ERR_DROP, "MAX_PACKETLEN" );
}
// generate a sequence of "random" numbers
for (i = 0 ; i < c ; i++) {
seed = (119 * seed + 1);
seq[i] = seed;
}
// byte xor the data after the header
for (i = SCRAMBLE_START ; i < c ; i++) {
buf->data[i] ^= seq[i];
}
// transpose each character in reverse order
for ( mask = 1 ; mask < c-SCRAMBLE_START ; mask = ( mask << 1 ) + 1 ) {
}
mask >>= 1;
for (i = c-1 ; i >= SCRAMBLE_START ; i--) {
j = SCRAMBLE_START + ( seq[i] & mask );
temp = buf->data[j];
buf->data[j] = buf->data[i];
buf->data[i] = temp;
}
}
#endif
/*
=================
Netchan_TransmitNextFragment
@ -225,7 +139,11 @@ void Netchan_TransmitNextFragment( netchan_t *chan ) {
MSG_WriteData( &send, chan->unsentBuffer + chan->unsentFragmentStart, fragmentLength );
// send the datagram
NET_SendPacket( chan->sock, send.cursize, send.data, chan->remoteAddress );
NET_SendPacket(chan->sock, send.cursize, send.data, chan->remoteAddress);
// Store send time and size of this packet for rate control
chan->lastSentTime = Sys_Milliseconds();
chan->lastSentSize = send.cursize;
if ( showpackets->integer ) {
Com_Printf ("%s send %4i : s=%i fragment=%i,%i\n"
@ -298,6 +216,10 @@ void Netchan_Transmit( netchan_t *chan, int length, const byte *data ) {
// send the datagram
NET_SendPacket( chan->sock, send.cursize, send.data, chan->remoteAddress );
// Store send time and size of this packet for rate control
chan->lastSentTime = Sys_Milliseconds();
chan->lastSentSize = send.cursize;
if ( showpackets->integer ) {
Com_Printf( "%s send %4i : s=%i ack=%i\n"
, netsrcString[ chan->sock ]