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Fix netcode inconsistency, thanks to /dev/humancontroller for the patch, see http://bugzilla.icculus.org/show_bug.cgi?id=4060

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This commit is contained in:
Thilo Schulz 2009-10-12 17:17:15 +00:00
parent e48b56559d
commit 186f30a74f
5 changed files with 22 additions and 23 deletions
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2
code/client/cl_input.c
View file

@ -863,7 +863,7 @@ void CL_WritePacket( void ) {
// also use the message acknowledge
key ^= clc.serverMessageSequence;
// also use the last acknowledged server command in the key
key ^= Com_HashKey(clc.serverCommands[ clc.serverCommandSequence & (MAX_RELIABLE_COMMANDS-1) ], 32);
key ^= MSG_HashKey(clc.serverCommands[ clc.serverCommandSequence & (MAX_RELIABLE_COMMANDS-1) ], 32);
// write all the commands, including the predicted command
for ( i = 0 ; i < count ; i++ ) {

16
code/qcommon/common.c
View file

@ -672,22 +672,6 @@ int Com_FilterPath(char *filter, char *name, int casesensitive)
return Com_Filter(new_filter, new_name, casesensitive);
}
/*
============
Com_HashKey
============
*/
int Com_HashKey(char *string, int maxlen) {
int register hash, i;
hash = 0;
for (i = 0; i < maxlen && string[i] != '\0'; i++) {
hash += string[i] * (119 + i);
}
hash = (hash ^ (hash >> 10) ^ (hash >> 20));
return hash;
}
/*
================
Com_RealTime

23
code/qcommon/msg.c
View file

@ -311,9 +311,9 @@ void MSG_WriteString( msg_t *sb, const char *s ) {
}
Q_strncpyz( string, s, sizeof( string ) );
// get rid of 0xff chars, because old clients don't like them
// get rid of 0x80+ and '%' chars, because old clients don't like them
for ( i = 0 ; i < l ; i++ ) {
if ( ((byte *)string)[i] > 127 ) {
if ( ((byte *)string)[i] > 127 || string[i] == '%' ) {
string[i] = '.';
}
}
@ -337,9 +337,9 @@ void MSG_WriteBigString( msg_t *sb, const char *s ) {
}
Q_strncpyz( string, s, sizeof( string ) );
// get rid of 0xff chars, because old clients don't like them
// get rid of 0x80+ and '%' chars, because old clients don't like them
for ( i = 0 ; i < l ; i++ ) {
if ( ((byte *)string)[i] > 127 ) {
if ( ((byte *)string)[i] > 127 || string[i] == '%' ) {
string[i] = '.';
}
}
@ -525,6 +525,21 @@ void MSG_ReadData( msg_t *msg, void *data, int len ) {
}
}
// a string hasher which gives the same hash value even if the
// string is later modified via the legacy MSG read/write code
int MSG_HashKey(const char *string, int maxlen) {
int hash, i;
hash = 0;
for (i = 0; i < maxlen && string[i] != '\0'; i++) {
if (string[i] & 0x80 || string[i] == '%')
hash += '.' * (119 + i);
else
hash += string[i] * (119 + i);
}
hash = (hash ^ (hash >> 10) ^ (hash >> 20));
return hash;
}
/*
=============================================================================

2
code/qcommon/qcommon.h
View file

@ -76,6 +76,7 @@ void MSG_WriteFloat (msg_t *sb, float f);
void MSG_WriteString (msg_t *sb, const char *s);
void MSG_WriteBigString (msg_t *sb, const char *s);
void MSG_WriteAngle16 (msg_t *sb, float f);
int MSG_HashKey(const char *string, int maxlen);
void MSG_BeginReading (msg_t *sb);
void MSG_BeginReadingOOB(msg_t *sb);
@ -799,7 +800,6 @@ void Com_Quit_f( void );
int Com_Milliseconds( void ); // will be journaled properly
unsigned Com_BlockChecksum( const void *buffer, int length );
char *Com_MD5File(const char *filename, int length, const char *prefix, int prefix_len);
int Com_HashKey(char *string, int maxlen);
int Com_Filter(char *filter, char *name, int casesensitive);
int Com_FilterPath(char *filter, char *name, int casesensitive);
int Com_RealTime(qtime_t *qtime);

2
code/server/sv_client.c
View file

@ -1605,7 +1605,7 @@ static void SV_UserMove( client_t *cl, msg_t *msg, qboolean delta ) {
// also use the message acknowledge
key ^= cl->messageAcknowledge;
// also use the last acknowledged server command in the key
key ^= Com_HashKey(cl->reliableCommands[ cl->reliableAcknowledge & (MAX_RELIABLE_COMMANDS-1) ], 32);
key ^= MSG_HashKey(cl->reliableCommands[ cl->reliableAcknowledge & (MAX_RELIABLE_COMMANDS-1) ], 32);
Com_Memset( &nullcmd, 0, sizeof(nullcmd) );
oldcmd = &nullcmd;