mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-12-14 14:11:15 +00:00
655 lines
17 KiB
C
Executable file
655 lines
17 KiB
C
Executable file
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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// cl_parse.c -- parse a message received from the server
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#include "client.h"
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char *svc_strings[256] = {
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"svc_bad",
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"svc_nop",
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"svc_gamestate",
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"svc_configstring",
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"svc_baseline",
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"svc_serverCommand",
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"svc_download",
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"svc_snapshot"
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};
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void SHOWNET( msg_t *msg, char *s) {
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if ( cl_shownet->integer >= 2) {
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Com_Printf ("%3i:%s\n", msg->readcount-1, s);
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}
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}
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/*
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=========================================================================
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MESSAGE PARSING
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=========================================================================
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*/
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/*
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==================
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CL_DeltaEntity
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Parses deltas from the given base and adds the resulting entity
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to the current frame
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==================
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*/
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void CL_DeltaEntity (msg_t *msg, clSnapshot_t *frame, int newnum, entityState_t *old,
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qboolean unchanged) {
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entityState_t *state;
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// save the parsed entity state into the big circular buffer so
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// it can be used as the source for a later delta
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state = &cl.parseEntities[cl.parseEntitiesNum & (MAX_PARSE_ENTITIES-1)];
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if ( unchanged ) {
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*state = *old;
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} else {
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MSG_ReadDeltaEntity( msg, old, state, newnum );
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}
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if ( state->number == (MAX_GENTITIES-1) ) {
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return; // entity was delta removed
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}
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cl.parseEntitiesNum++;
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frame->numEntities++;
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}
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/*
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==================
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CL_ParsePacketEntities
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==================
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*/
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void CL_ParsePacketEntities( msg_t *msg, clSnapshot_t *oldframe, clSnapshot_t *newframe) {
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int newnum;
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entityState_t *oldstate;
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int oldindex, oldnum;
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newframe->parseEntitiesNum = cl.parseEntitiesNum;
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newframe->numEntities = 0;
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// delta from the entities present in oldframe
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oldindex = 0;
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oldstate = NULL;
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if (!oldframe) {
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oldnum = 99999;
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} else {
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if ( oldindex >= oldframe->numEntities ) {
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oldnum = 99999;
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} else {
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oldstate = &cl.parseEntities[
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(oldframe->parseEntitiesNum + oldindex) & (MAX_PARSE_ENTITIES-1)];
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oldnum = oldstate->number;
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}
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}
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while ( 1 ) {
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// read the entity index number
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newnum = MSG_ReadBits( msg, GENTITYNUM_BITS );
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if ( newnum == (MAX_GENTITIES-1) ) {
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break;
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}
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if ( msg->readcount > msg->cursize ) {
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Com_Error (ERR_DROP,"CL_ParsePacketEntities: end of message");
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}
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while ( oldnum < newnum ) {
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// one or more entities from the old packet are unchanged
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if ( cl_shownet->integer == 3 ) {
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Com_Printf ("%3i: unchanged: %i\n", msg->readcount, oldnum);
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}
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CL_DeltaEntity( msg, newframe, oldnum, oldstate, qtrue );
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oldindex++;
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if ( oldindex >= oldframe->numEntities ) {
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oldnum = 99999;
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} else {
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oldstate = &cl.parseEntities[
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(oldframe->parseEntitiesNum + oldindex) & (MAX_PARSE_ENTITIES-1)];
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oldnum = oldstate->number;
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}
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}
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if (oldnum == newnum) {
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// delta from previous state
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if ( cl_shownet->integer == 3 ) {
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Com_Printf ("%3i: delta: %i\n", msg->readcount, newnum);
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}
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CL_DeltaEntity( msg, newframe, newnum, oldstate, qfalse );
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oldindex++;
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if ( oldindex >= oldframe->numEntities ) {
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oldnum = 99999;
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} else {
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oldstate = &cl.parseEntities[
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(oldframe->parseEntitiesNum + oldindex) & (MAX_PARSE_ENTITIES-1)];
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oldnum = oldstate->number;
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}
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continue;
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}
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if ( oldnum > newnum ) {
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// delta from baseline
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if ( cl_shownet->integer == 3 ) {
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Com_Printf ("%3i: baseline: %i\n", msg->readcount, newnum);
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}
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CL_DeltaEntity( msg, newframe, newnum, &cl.entityBaselines[newnum], qfalse );
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continue;
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}
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}
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// any remaining entities in the old frame are copied over
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while ( oldnum != 99999 ) {
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// one or more entities from the old packet are unchanged
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if ( cl_shownet->integer == 3 ) {
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Com_Printf ("%3i: unchanged: %i\n", msg->readcount, oldnum);
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}
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CL_DeltaEntity( msg, newframe, oldnum, oldstate, qtrue );
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oldindex++;
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if ( oldindex >= oldframe->numEntities ) {
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oldnum = 99999;
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} else {
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oldstate = &cl.parseEntities[
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(oldframe->parseEntitiesNum + oldindex) & (MAX_PARSE_ENTITIES-1)];
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oldnum = oldstate->number;
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}
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}
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}
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/*
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================
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CL_ParseSnapshot
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If the snapshot is parsed properly, it will be copied to
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cl.snap and saved in cl.snapshots[]. If the snapshot is invalid
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for any reason, no changes to the state will be made at all.
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================
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*/
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void CL_ParseSnapshot( msg_t *msg ) {
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int len;
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clSnapshot_t *old;
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clSnapshot_t newSnap;
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int deltaNum;
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int oldMessageNum;
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int i, packetNum;
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// get the reliable sequence acknowledge number
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// NOTE: now sent with all server to client messages
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//clc.reliableAcknowledge = MSG_ReadLong( msg );
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// read in the new snapshot to a temporary buffer
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// we will only copy to cl.snap if it is valid
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Com_Memset (&newSnap, 0, sizeof(newSnap));
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// we will have read any new server commands in this
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// message before we got to svc_snapshot
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newSnap.serverCommandNum = clc.serverCommandSequence;
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newSnap.serverTime = MSG_ReadLong( msg );
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newSnap.messageNum = clc.serverMessageSequence;
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deltaNum = MSG_ReadByte( msg );
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if ( !deltaNum ) {
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newSnap.deltaNum = -1;
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} else {
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newSnap.deltaNum = newSnap.messageNum - deltaNum;
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}
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newSnap.snapFlags = MSG_ReadByte( msg );
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// If the frame is delta compressed from data that we
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// no longer have available, we must suck up the rest of
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// the frame, but not use it, then ask for a non-compressed
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// message
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if ( newSnap.deltaNum <= 0 ) {
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newSnap.valid = qtrue; // uncompressed frame
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old = NULL;
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clc.demowaiting = qfalse; // we can start recording now
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} else {
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old = &cl.snapshots[newSnap.deltaNum & PACKET_MASK];
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if ( !old->valid ) {
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// should never happen
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Com_Printf ("Delta from invalid frame (not supposed to happen!).\n");
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} else if ( old->messageNum != newSnap.deltaNum ) {
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// The frame that the server did the delta from
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// is too old, so we can't reconstruct it properly.
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Com_Printf ("Delta frame too old.\n");
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} else if ( cl.parseEntitiesNum - old->parseEntitiesNum > MAX_PARSE_ENTITIES-128 ) {
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Com_Printf ("Delta parseEntitiesNum too old.\n");
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} else {
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newSnap.valid = qtrue; // valid delta parse
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}
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}
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// read areamask
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len = MSG_ReadByte( msg );
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MSG_ReadData( msg, &newSnap.areamask, len);
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// read playerinfo
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SHOWNET( msg, "playerstate" );
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if ( old ) {
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MSG_ReadDeltaPlayerstate( msg, &old->ps, &newSnap.ps );
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} else {
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MSG_ReadDeltaPlayerstate( msg, NULL, &newSnap.ps );
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}
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// read packet entities
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SHOWNET( msg, "packet entities" );
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CL_ParsePacketEntities( msg, old, &newSnap );
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// if not valid, dump the entire thing now that it has
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// been properly read
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if ( !newSnap.valid ) {
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return;
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}
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// clear the valid flags of any snapshots between the last
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// received and this one, so if there was a dropped packet
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// it won't look like something valid to delta from next
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// time we wrap around in the buffer
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oldMessageNum = cl.snap.messageNum + 1;
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if ( newSnap.messageNum - oldMessageNum >= PACKET_BACKUP ) {
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oldMessageNum = newSnap.messageNum - ( PACKET_BACKUP - 1 );
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}
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for ( ; oldMessageNum < newSnap.messageNum ; oldMessageNum++ ) {
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cl.snapshots[oldMessageNum & PACKET_MASK].valid = qfalse;
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}
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// copy to the current good spot
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cl.snap = newSnap;
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cl.snap.ping = 999;
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// calculate ping time
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for ( i = 0 ; i < PACKET_BACKUP ; i++ ) {
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packetNum = ( clc.netchan.outgoingSequence - 1 - i ) & PACKET_MASK;
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if ( cl.snap.ps.commandTime >= cl.outPackets[ packetNum ].p_serverTime ) {
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cl.snap.ping = cls.realtime - cl.outPackets[ packetNum ].p_realtime;
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break;
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}
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}
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// save the frame off in the backup array for later delta comparisons
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cl.snapshots[cl.snap.messageNum & PACKET_MASK] = cl.snap;
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if (cl_shownet->integer == 3) {
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Com_Printf( " snapshot:%i delta:%i ping:%i\n", cl.snap.messageNum,
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cl.snap.deltaNum, cl.snap.ping );
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}
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cl.newSnapshots = qtrue;
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}
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//=====================================================================
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int cl_connectedToPureServer;
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/*
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==================
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CL_SystemInfoChanged
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The systeminfo configstring has been changed, so parse
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new information out of it. This will happen at every
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gamestate, and possibly during gameplay.
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==================
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*/
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void CL_SystemInfoChanged( void ) {
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char *systemInfo;
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const char *s, *t;
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char key[BIG_INFO_KEY];
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char value[BIG_INFO_VALUE];
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qboolean gameSet;
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systemInfo = cl.gameState.stringData + cl.gameState.stringOffsets[ CS_SYSTEMINFO ];
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// NOTE TTimo:
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// when the serverId changes, any further messages we send to the server will use this new serverId
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// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=475
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// in some cases, outdated cp commands might get sent with this news serverId
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cl.serverId = atoi( Info_ValueForKey( systemInfo, "sv_serverid" ) );
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// don't set any vars when playing a demo
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if ( clc.demoplaying ) {
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return;
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}
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s = Info_ValueForKey( systemInfo, "sv_cheats" );
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if ( atoi(s) == 0 ) {
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Cvar_SetCheatState();
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}
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// check pure server string
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s = Info_ValueForKey( systemInfo, "sv_paks" );
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t = Info_ValueForKey( systemInfo, "sv_pakNames" );
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FS_PureServerSetLoadedPaks( s, t );
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s = Info_ValueForKey( systemInfo, "sv_referencedPaks" );
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t = Info_ValueForKey( systemInfo, "sv_referencedPakNames" );
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FS_PureServerSetReferencedPaks( s, t );
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gameSet = qfalse;
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// scan through all the variables in the systeminfo and locally set cvars to match
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s = systemInfo;
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while ( s ) {
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Info_NextPair( &s, key, value );
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if ( !key[0] ) {
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break;
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}
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// ehw!
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if ( !Q_stricmp( key, "fs_game" ) ) {
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gameSet = qtrue;
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}
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Cvar_Set( key, value );
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}
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// if game folder should not be set and it is set at the client side
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if ( !gameSet && *Cvar_VariableString("fs_game") ) {
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Cvar_Set( "fs_game", "" );
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}
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cl_connectedToPureServer = Cvar_VariableValue( "sv_pure" );
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}
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/*
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==================
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CL_ParseGamestate
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==================
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*/
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void CL_ParseGamestate( msg_t *msg ) {
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int i;
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entityState_t *es;
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int newnum;
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entityState_t nullstate;
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int cmd;
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char *s;
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Con_Close();
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clc.connectPacketCount = 0;
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// wipe local client state
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CL_ClearState();
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// a gamestate always marks a server command sequence
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clc.serverCommandSequence = MSG_ReadLong( msg );
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// parse all the configstrings and baselines
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cl.gameState.dataCount = 1; // leave a 0 at the beginning for uninitialized configstrings
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while ( 1 ) {
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cmd = MSG_ReadByte( msg );
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if ( cmd == svc_EOF ) {
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break;
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}
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if ( cmd == svc_configstring ) {
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int len;
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i = MSG_ReadShort( msg );
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if ( i < 0 || i >= MAX_CONFIGSTRINGS ) {
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Com_Error( ERR_DROP, "configstring > MAX_CONFIGSTRINGS" );
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}
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s = MSG_ReadBigString( msg );
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len = strlen( s );
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if ( len + 1 + cl.gameState.dataCount > MAX_GAMESTATE_CHARS ) {
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Com_Error( ERR_DROP, "MAX_GAMESTATE_CHARS exceeded" );
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}
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// append it to the gameState string buffer
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cl.gameState.stringOffsets[ i ] = cl.gameState.dataCount;
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Com_Memcpy( cl.gameState.stringData + cl.gameState.dataCount, s, len + 1 );
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cl.gameState.dataCount += len + 1;
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} else if ( cmd == svc_baseline ) {
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newnum = MSG_ReadBits( msg, GENTITYNUM_BITS );
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if ( newnum < 0 || newnum >= MAX_GENTITIES ) {
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Com_Error( ERR_DROP, "Baseline number out of range: %i", newnum );
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}
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Com_Memset (&nullstate, 0, sizeof(nullstate));
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es = &cl.entityBaselines[ newnum ];
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MSG_ReadDeltaEntity( msg, &nullstate, es, newnum );
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} else {
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Com_Error( ERR_DROP, "CL_ParseGamestate: bad command byte" );
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}
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}
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clc.clientNum = MSG_ReadLong(msg);
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// read the checksum feed
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clc.checksumFeed = MSG_ReadLong( msg );
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// parse serverId and other cvars
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CL_SystemInfoChanged();
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// reinitialize the filesystem if the game directory has changed
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FS_ConditionalRestart( clc.checksumFeed );
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// This used to call CL_StartHunkUsers, but now we enter the download state before loading the
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// cgame
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CL_InitDownloads();
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// make sure the game starts
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Cvar_Set( "cl_paused", "0" );
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}
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//=====================================================================
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/*
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=====================
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CL_ParseDownload
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A download message has been received from the server
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=====================
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*/
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void CL_ParseDownload ( msg_t *msg ) {
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int size;
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unsigned char data[MAX_MSGLEN];
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int block;
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// read the data
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block = MSG_ReadShort ( msg );
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if ( !block )
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{
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// block zero is special, contains file size
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clc.downloadSize = MSG_ReadLong ( msg );
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Cvar_SetValue( "cl_downloadSize", clc.downloadSize );
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if (clc.downloadSize < 0)
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{
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Com_Error(ERR_DROP, MSG_ReadString( msg ) );
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return;
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}
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}
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size = MSG_ReadShort ( msg );
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if (size > 0)
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MSG_ReadData( msg, data, size );
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if (clc.downloadBlock != block) {
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Com_DPrintf( "CL_ParseDownload: Expected block %d, got %d\n", clc.downloadBlock, block);
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return;
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}
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// open the file if not opened yet
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if (!clc.download)
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{
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if (!*clc.downloadTempName) {
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Com_Printf("Server sending download, but no download was requested\n");
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CL_AddReliableCommand( "stopdl" );
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return;
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}
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clc.download = FS_SV_FOpenFileWrite( clc.downloadTempName );
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if (!clc.download) {
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Com_Printf( "Could not create %s\n", clc.downloadTempName );
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CL_AddReliableCommand( "stopdl" );
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CL_NextDownload();
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return;
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}
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}
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if (size)
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FS_Write( data, size, clc.download );
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CL_AddReliableCommand( va("nextdl %d", clc.downloadBlock) );
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clc.downloadBlock++;
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clc.downloadCount += size;
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// So UI gets access to it
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Cvar_SetValue( "cl_downloadCount", clc.downloadCount );
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if (!size) { // A zero length block means EOF
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if (clc.download) {
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FS_FCloseFile( clc.download );
|
|
clc.download = 0;
|
|
|
|
// rename the file
|
|
FS_SV_Rename ( clc.downloadTempName, clc.downloadName );
|
|
}
|
|
*clc.downloadTempName = *clc.downloadName = 0;
|
|
Cvar_Set( "cl_downloadName", "" );
|
|
|
|
// send intentions now
|
|
// We need this because without it, we would hold the last nextdl and then start
|
|
// loading right away. If we take a while to load, the server is happily trying
|
|
// to send us that last block over and over.
|
|
// Write it twice to help make sure we acknowledge the download
|
|
CL_WritePacket();
|
|
CL_WritePacket();
|
|
|
|
// get another file if needed
|
|
CL_NextDownload ();
|
|
}
|
|
}
|
|
|
|
/*
|
|
=====================
|
|
CL_ParseCommandString
|
|
|
|
Command strings are just saved off until cgame asks for them
|
|
when it transitions a snapshot
|
|
=====================
|
|
*/
|
|
void CL_ParseCommandString( msg_t *msg ) {
|
|
char *s;
|
|
int seq;
|
|
int index;
|
|
|
|
seq = MSG_ReadLong( msg );
|
|
s = MSG_ReadString( msg );
|
|
|
|
// see if we have already executed stored it off
|
|
if ( clc.serverCommandSequence >= seq ) {
|
|
return;
|
|
}
|
|
clc.serverCommandSequence = seq;
|
|
|
|
index = seq & (MAX_RELIABLE_COMMANDS-1);
|
|
Q_strncpyz( clc.serverCommands[ index ], s, sizeof( clc.serverCommands[ index ] ) );
|
|
}
|
|
|
|
|
|
/*
|
|
=====================
|
|
CL_ParseServerMessage
|
|
=====================
|
|
*/
|
|
void CL_ParseServerMessage( msg_t *msg ) {
|
|
int cmd;
|
|
|
|
if ( cl_shownet->integer == 1 ) {
|
|
Com_Printf ("%i ",msg->cursize);
|
|
} else if ( cl_shownet->integer >= 2 ) {
|
|
Com_Printf ("------------------\n");
|
|
}
|
|
|
|
MSG_Bitstream(msg);
|
|
|
|
// get the reliable sequence acknowledge number
|
|
clc.reliableAcknowledge = MSG_ReadLong( msg );
|
|
//
|
|
if ( clc.reliableAcknowledge < clc.reliableSequence - MAX_RELIABLE_COMMANDS ) {
|
|
clc.reliableAcknowledge = clc.reliableSequence;
|
|
}
|
|
|
|
//
|
|
// parse the message
|
|
//
|
|
while ( 1 ) {
|
|
if ( msg->readcount > msg->cursize ) {
|
|
Com_Error (ERR_DROP,"CL_ParseServerMessage: read past end of server message");
|
|
break;
|
|
}
|
|
|
|
cmd = MSG_ReadByte( msg );
|
|
|
|
if ( cmd == svc_EOF) {
|
|
SHOWNET( msg, "END OF MESSAGE" );
|
|
break;
|
|
}
|
|
|
|
if ( cl_shownet->integer >= 2 ) {
|
|
if ( !svc_strings[cmd] ) {
|
|
Com_Printf( "%3i:BAD CMD %i\n", msg->readcount-1, cmd );
|
|
} else {
|
|
SHOWNET( msg, svc_strings[cmd] );
|
|
}
|
|
}
|
|
|
|
// other commands
|
|
switch ( cmd ) {
|
|
default:
|
|
Com_Error (ERR_DROP,"CL_ParseServerMessage: Illegible server message\n");
|
|
break;
|
|
case svc_nop:
|
|
break;
|
|
case svc_serverCommand:
|
|
CL_ParseCommandString( msg );
|
|
break;
|
|
case svc_gamestate:
|
|
CL_ParseGamestate( msg );
|
|
break;
|
|
case svc_snapshot:
|
|
CL_ParseSnapshot( msg );
|
|
break;
|
|
case svc_download:
|
|
CL_ParseDownload( msg );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|