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fix crash assuming wrong stream version

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This commit is contained in:
Eric House 2023-12-22 08:24:14 -08:00
parent 713ce151e9
commit 7275569842
1 changed files with 12 additions and 10 deletions
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22
xwords4/common/server.c
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@ -263,7 +263,8 @@ static XP_Bool handleIllegalWord( ServerCtxt* server, XWEnv xwe,
static void tellMoveWasLegal( ServerCtxt* server, XWEnv xwe );
static void writeProto( const ServerCtxt* server, XWStreamCtxt* stream,
XW_Proto proto );
static void readGuestAddrs( ServerCtxt* server, XWStreamCtxt* stream );
static void readGuestAddrs( ServerCtxt* server, XWStreamCtxt* stream,
XP_U8 streamVersion );
static void ri_fromStream( RematchInfo* rip, XWStreamCtxt* stream,
const ServerCtxt* server );
@ -636,7 +637,7 @@ server_makeFromStream( MPFORMAL XWEnv xwe, XWStreamCtxt* stream, ModelCtxt* mode
if ( server->vol.gi->serverRole == SERVER_ISCLIENT
&& 2 < nPlayers ) {
readGuestAddrs( server, stream );
readGuestAddrs( server, stream, server->nv.streamVersion );
}
if ( 0 != (server->nv.flags & MASK_HAVE_RIP_INFO) ) {
@ -916,6 +917,7 @@ addGuestAddrsIf( const ServerCtxt* server, XP_U16 sendee, XWStreamCtxt* stream )
XP_LOGFF("(sendee: %d)", sendee );
XP_ASSERT( amHost( server ) );
XP_U16 version = stream_getVersion( stream );
XP_ASSERT( version == server->nv.streamVersion );
if ( STREAM_VERS_REMATCHADDRS <= version
/* Not needed for two-device games */
&& 2 < server->nv.nDevices ) {
@ -953,11 +955,10 @@ addGuestAddrsIf( const ServerCtxt* server, XP_U16 sendee, XWStreamCtxt* stream )
}
static void
readGuestAddrs( ServerCtxt* server, XWStreamCtxt* stream )
readGuestAddrs( ServerCtxt* server, XWStreamCtxt* stream, XP_U8 streamVersion )
{
XP_U16 version = stream_getVersion( stream );
XP_LOGFF( "version: %X", version );
if ( STREAM_VERS_REMATCHADDRS <= version && 0 < stream_getSize(stream) ) {
XP_LOGFF( "version: 0x%X", streamVersion );
if ( STREAM_VERS_REMATCHADDRS <= streamVersion && 0 < stream_getSize(stream) ) {
XP_U16 len = server->nv.rematch.addrsLen = stream_getU32VL( stream );
XP_LOGFF( "rematch.addrsLen: %d", server->nv.rematch.addrsLen );
if ( 0 < len ) {
@ -967,11 +968,11 @@ readGuestAddrs( ServerCtxt* server, XWStreamCtxt* stream )
XP_LOGFF( "loaded %d bytes of rematch.addrs", len );
#ifdef DEBUG
XWStreamCtxt* tmpStream = mkServerStream( server );
stream_setVersion( tmpStream, version );
stream_setVersion( tmpStream, streamVersion );
stream_putBytes( tmpStream, server->nv.rematch.addrs,
server->nv.rematch.addrsLen );
if ( STREAM_VERS_REMATCHORDER <= version ) {
if ( STREAM_VERS_REMATCHORDER <= streamVersion ) {
RematchInfo ri;
ri_fromStream( &ri, tmpStream, server );
for ( int ii = 0; ii < ri.nAddrs; ++ii ) {
@ -2197,7 +2198,7 @@ client_readInitialMessage( ServerCtxt* server, XWEnv xwe, XWStreamCtxt* stream )
/* version; any dependencies here? */
XP_U8 streamVersion = stream_getU8( stream );
XP_LOGFF( "set streamVersion to %d", streamVersion );
XP_LOGFF( "set streamVersion to 0x%X", streamVersion );
stream_setVersion( stream, streamVersion );
if ( STREAM_VERS_NINETILES > streamVersion ) {
model_forceStack7Tiles( server->vol.model );
@ -2303,7 +2304,7 @@ client_readInitialMessage( ServerCtxt* server, XWEnv xwe, XWStreamCtxt* stream )
}
readMQTTDevID( server, stream );
readGuestAddrs( server, stream );
readGuestAddrs( server, stream, stream_getVersion( stream ) );
syncPlayers( server );
@ -2354,6 +2355,7 @@ sendInitialMessage( ServerCtxt* server, XWEnv xwe )
XP_U32 gameID = server->vol.gi->gameID;
#ifdef STREAM_VERS_BIGBOARD
XP_U8 streamVersion = server->nv.streamVersion;
XP_LOGFF( "streamVersion: 0x%X", streamVersion );
#endif
XP_ASSERT( server->nv.nDevices > 1 );