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engine: make LZSS compression optional for 49 protocol, disable it for local clients (singleplayer)

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This commit is contained in:
Alibek Omarov 2025-01-22 21:18:11 +03:00
parent d29e53481d
commit 1e075d25b7
4 changed files with 14 additions and 7 deletions
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3
engine/client/cl_main.c
View file

@ -1597,6 +1597,9 @@ void CL_SetupNetchanForProtocol( connprotocol_t proto )
}
break;
default:
if( !Host_IsLocalClient( ))
SetBits( flags, NETCHAN_USE_LZSS );
cls.extensions = Q_atoi( Info_ValueForKey( Cmd_Argv( 1 ), "ext" ));
if( FBitSet( cls.extensions, NET_EXT_SPLITSIZE ))

9
engine/common/net_chan.c
View file

@ -341,6 +341,7 @@ void Netchan_Setup( netsrc_t sock, netchan_t *chan, netadr_t adr, int qport, voi
chan->split = FBitSet( flags, NETCHAN_USE_LEGACY_SPLIT ) ? true : false;
chan->use_munge = FBitSet( flags, NETCHAN_USE_MUNGE ) ? true : false;
chan->use_bz2 = FBitSet( flags, NETCHAN_USE_BZIP2 ) ? true : false;
chan->use_lzss = FBitSet( flags, NETCHAN_USE_LZSS ) ? true : false;
chan->gs_netchan = FBitSet( flags, NETCHAN_GOLDSRC ) ? true : false;
MSG_Init( &chan->message, "NetData", chan->message_buf, sizeof( chan->message_buf ));
@ -766,7 +767,7 @@ static void Netchan_CreateFragments_( netchan_t *chan, sizebuf_t *msg )
Host_Error( "%s: BZ2 compression is not supported for server", __func__ );
#endif
}
else if( !chan->use_bz2 && !LZSS_IsCompressed( MSG_GetData( msg ), MSG_GetMaxBytes( msg )))
else if( chan->use_lzss && !LZSS_IsCompressed( MSG_GetData( msg ), MSG_GetMaxBytes( msg )))
{
uint uCompressedSize = 0;
uint uSourceSize = MSG_GetNumBytesWritten( msg );
@ -1173,7 +1174,7 @@ qboolean Netchan_CopyNormalFragments( netchan_t *chan, sizebuf_t *msg, size_t *l
p = n;
}
if( chan->use_bz2 && !memcmp( MSG_GetData( msg ), "BZ2", 4 ) )
if( chan->use_bz2 && !memcmp( MSG_GetData( msg ), "BZ2", 4 ))
{
#if !XASH_DEDICATED
byte buf[0x10000];
@ -1194,7 +1195,7 @@ qboolean Netchan_CopyNormalFragments( netchan_t *chan, sizebuf_t *msg, size_t *l
Host_Error( "%s: BZ2 compression is not supported for server\n", __func__ );
#endif
}
else if( !chan->use_bz2 && LZSS_IsCompressed( MSG_GetData( msg ), size ))
else if( chan->use_lzss && LZSS_IsCompressed( MSG_GetData( msg ), size ))
{
uint uDecompressedLen = LZSS_GetActualSize( MSG_GetData( msg ), size );
byte buf[NET_MAX_MESSAGE];
@ -1345,7 +1346,7 @@ qboolean Netchan_CopyFileFragments( netchan_t *chan, sizebuf_t *msg )
Host_Error( "%s: BZ2 compression is not supported for server", __func__ );
#endif
}
else if( LZSS_IsCompressed( buffer, nsize + 1 ))
else if( chan->use_lzss && LZSS_IsCompressed( buffer, nsize + 1 ))
{
byte *uncompressedBuffer;

2
engine/common/netchan.h
View file

@ -214,6 +214,7 @@ typedef enum netchan_flags_e
NETCHAN_USE_MUNGE = BIT( 1 ),
NETCHAN_USE_BZIP2 = BIT( 2 ),
NETCHAN_GOLDSRC = BIT( 3 ),
NETCHAN_USE_LZSS = BIT( 4 ), // mutually exclusive with bzip2
} netchan_flags_t;
// Network Connection Channel
@ -285,6 +286,7 @@ typedef struct netchan_s
qboolean split;
qboolean use_munge;
qboolean use_bz2;
qboolean use_lzss;
qboolean gs_netchan;
} netchan_t;

7
engine/server/sv_client.c
View file

@ -305,6 +305,7 @@ static void SV_ConnectClient( netadr_t from )
int challenge;
const char *s;
int extensions;
uint netchan_flags = 0;
if( Cmd_Argc() < 5 )
{
@ -431,7 +432,9 @@ static void SV_ConnectClient( netadr_t from )
newcl->listeners = -1;
// initailize netchan
Netchan_Setup( NS_SERVER, &newcl->netchan, from, qport, newcl, SV_GetFragmentSize, 0 );
if( !Host_IsLocalClient( ))
SetBits( netchan_flags, NETCHAN_USE_LZSS );
Netchan_Setup( NS_SERVER, &newcl->netchan, from, qport, newcl, SV_GetFragmentSize, netchan_flags );
MSG_Init( &newcl->datagram, "Datagram", newcl->datagram_buf, sizeof( newcl->datagram_buf )); // datagram buf
Q_strncpy( newcl->hashedcdkey, Info_ValueForKey( protinfo, "uuid" ), 32 );
@ -450,8 +453,6 @@ static void SV_ConnectClient( netadr_t from )
newcl->delta_sequence = -1;
newcl->flags = 0;
// reset any remaining events
memset( &newcl->events, 0, sizeof( newcl->events ));