X-Git-Url: http://git.xonotic.org/?a=blobdiff_plain;f=protocol.c;h=d72e961571fb698cda74276421b2da6609caf224;hb=0d43a1bcf22b005ab7feec5373db766819aca92d;hp=32624a4f0d2b1ee932492761f4ddbc54bb08156d;hpb=ef35a088cb3ab1900acdbd5285465cd845368e79;p=xonotic%2Fdarkplaces.git

diff --git a/protocol.c b/protocol.c
index 32624a4f..d72e9615 100644
--- a/protocol.c
+++ b/protocol.c
@@ -1,743 +1,194 @@
-
 #include "quakedef.h"
 
-void ClearStateToDefault(entity_state_t *s)
+// this is 88 bytes (must match entity_state_t in protocol.h)
+entity_state_t defaultstate =
+{
+	// ! means this is not sent to client
+	0,//double time; // ! time this state was built (used on client for interpolation)
+	{0,0,0},//float netcenter[3]; // ! for network prioritization, this is the center of the bounding box (which may differ from the origin)
+	{0,0,0},//float origin[3];
+	{0,0,0},//float angles[3];
+	0,//int effects;
+	0,//unsigned int customizeentityforclient; // !
+	0,//unsigned short number; // entity number this state is for
+	0,//unsigned short modelindex;
+	0,//unsigned short frame;
+	0,//unsigned short tagentity;
+	0,//unsigned short specialvisibilityradius; // ! larger if it has effects/light
+	0,//unsigned short viewmodelforclient; // !
+	0,//unsigned short exteriormodelforclient; // ! not shown if first person viewing from this entity, shown in all other cases
+	0,//unsigned short nodrawtoclient; // !
+	0,//unsigned short drawonlytoclient; // !
+	0,//unsigned short traileffectnum;
+	{0,0,0,0},//unsigned short light[4]; // color*256 (0.00 to 255.996), and radius*1
+	ACTIVE_NOT,//unsigned char active; // true if a valid state
+	0,//unsigned char lightstyle;
+	0,//unsigned char lightpflags;
+	0,//unsigned char colormap;
+	0,//unsigned char skin; // also chooses cubemap for rtlights if lightpflags & LIGHTPFLAGS_FULLDYNAMIC
+	255,//unsigned char alpha;
+	16,//unsigned char scale;
+	0,//unsigned char glowsize;
+	254,//unsigned char glowcolor;
+	0,//unsigned char flags;
+	0,//unsigned char internaleffects; // INTEF_FLAG1QW and so on
+	0,//unsigned char tagindex;
+	{32, 32, 32},//unsigned char colormod[3];
+	{32, 32, 32},//unsigned char glowmod[3];
+};
+
+// LadyHavoc: I own protocol ranges 96, 97, 3500-3599
+
+struct protocolversioninfo_s
+{
+	int number;
+	protocolversion_t version;
+	const char *name;
+}
+protocolversioninfo[] =
+{
+	{ 3505, PROTOCOL_DARKPLACES8 , "DP8"},
+	{ 3504, PROTOCOL_DARKPLACES7 , "DP7"},
+	{ 3503, PROTOCOL_DARKPLACES6 , "DP6"},
+	{ 3502, PROTOCOL_DARKPLACES5 , "DP5"},
+	{ 3501, PROTOCOL_DARKPLACES4 , "DP4"},
+	{ 3500, PROTOCOL_DARKPLACES3 , "DP3"},
+	{   97, PROTOCOL_DARKPLACES2 , "DP2"},
+	{   96, PROTOCOL_DARKPLACES1 , "DP1"},
+	{   15, PROTOCOL_QUAKEDP     , "QUAKEDP"},
+	{   15, PROTOCOL_QUAKE       , "QUAKE"},
+	{   28, PROTOCOL_QUAKEWORLD  , "QW"},
+	{  250, PROTOCOL_NEHAHRAMOVIE, "NEHAHRAMOVIE"},
+	{10000, PROTOCOL_NEHAHRABJP  , "NEHAHRABJP"},
+	{10001, PROTOCOL_NEHAHRABJP2 , "NEHAHRABJP2"},
+	{10002, PROTOCOL_NEHAHRABJP3 , "NEHAHRABJP3"},
+	{    0, PROTOCOL_UNKNOWN     , NULL}
+};
+
+protocolversion_t Protocol_EnumForName(const char *s)
 {
-	memset(s, 0, sizeof(*s));
-	s->alpha = 255;
-	s->scale = 16;
-	s->glowcolor = 254;
+	int i;
+	for (i = 0;protocolversioninfo[i].name;i++)
+		if (!strcasecmp(s, protocolversioninfo[i].name))
+			return protocolversioninfo[i].version;
+	return PROTOCOL_UNKNOWN;
 }
 
-void EntityState_Write(entity_state_t *ent, sizebuf_t *msg, entity_state_t *delta)
+const char *Protocol_NameForEnum(protocolversion_t p)
 {
-	int bits;
-	vec3_t org, deltaorg;
-	if (ent->active)
-	{
-		bits = 0;
-		VectorCopy(ent->origin, org);
-		VectorCopy(delta->origin, deltaorg);
-		if (ent->flags & RENDER_LOWPRECISION)
-		{
-			if (org[0] > 0)
-				org[0] = (int) (org[0] + 0.5f);
-			else
-				org[0] = (int) (org[0] - 0.5f);
-			if (org[1] > 0)
-				org[1] = (int) (org[1] + 0.5f);
-			else
-				org[1] = (int) (org[1] - 0.5f);
-			if (org[2] > 0)
-				org[2] = (int) (org[2] + 0.5f);
-			else
-				org[2] = (int) (org[2] - 0.5f);
-		}
-		if (delta->flags & RENDER_LOWPRECISION)
-		{
-			if (deltaorg[0] > 0)
-				deltaorg[0] = (int) (deltaorg[0] + 0.5f);
-			else
-				deltaorg[0] = (int) (deltaorg[0] - 0.5f);
-			if (deltaorg[1] > 0)
-				deltaorg[1] = (int) (deltaorg[1] + 0.5f);
-			else
-				deltaorg[1] = (int) (deltaorg[1] - 0.5f);
-			if (deltaorg[2] > 0)
-				deltaorg[2] = (int) (deltaorg[2] + 0.5f);
-			else
-				deltaorg[2] = (int) (deltaorg[2] - 0.5f);
-		}
-		if (fabs(org[0] - deltaorg[0]) > 0.01f)
-			bits |= E_ORIGIN1;
-		if (fabs(org[1] - deltaorg[1]) > 0.01f)
-			bits |= E_ORIGIN2;
-		if (fabs(org[2] - deltaorg[2]) > 0.01f)
-			bits |= E_ORIGIN3;
-		if ((qbyte) (ent->angles[0] * (256.0f / 360.0f)) != (qbyte) (delta->angles[0] * (256.0f / 360.0f)))
-			bits |= E_ANGLE1;
-		if ((qbyte) (ent->angles[1] * (256.0f / 360.0f)) != (qbyte) (delta->angles[1] * (256.0f / 360.0f)))
-			bits |= E_ANGLE2;
-		if ((qbyte) (ent->angles[2] * (256.0f / 360.0f)) != (qbyte) (delta->angles[2] * (256.0f / 360.0f)))
-			bits |= E_ANGLE3;
-		if ((ent->modelindex ^ delta->modelindex) & 0x00FF)
-			bits |= E_MODEL1;
-		if ((ent->modelindex ^ delta->modelindex) & 0xFF00)
-			bits |= E_MODEL2;
-		if ((ent->frame ^ delta->frame) & 0x00FF)
-			bits |= E_FRAME1;
-		if ((ent->frame ^ delta->frame) & 0xFF00)
-			bits |= E_FRAME2;
-		if ((ent->effects ^ delta->effects) & 0x00FF)
-			bits |= E_EFFECTS1;
-		if ((ent->effects ^ delta->effects) & 0xFF00)
-			bits |= E_EFFECTS2;
-		if (ent->colormap != delta->colormap)
-			bits |= E_COLORMAP;
-		if (ent->skin != delta->skin)
-			bits |= E_SKIN;
-		if (ent->alpha != delta->alpha)
-			bits |= E_ALPHA;
-		if (ent->scale != delta->scale)
-			bits |= E_SCALE;
-		if (ent->glowsize != delta->glowsize)
-			bits |= E_GLOWSIZE;
-		if (ent->glowcolor != delta->glowcolor)
-			bits |= E_GLOWCOLOR;
-		if (ent->flags != delta->flags)
-			bits |= E_FLAGS;
-		if (ent->tagindex != delta->tagindex || ent->tagentity != delta->tagentity)
-			bits |= E_TAGATTACHMENT;
-
-		if (bits) // don't send anything if it hasn't changed
-		{
-			if (bits & 0xFF000000)
-				bits |= E_EXTEND3;
-			if (bits & 0x00FF0000)
-				bits |= E_EXTEND2;
-			if (bits & 0x0000FF00)
-				bits |= E_EXTEND1;
-
-			MSG_WriteShort(msg, ent->number);
-			MSG_WriteByte(msg, bits & 0xFF);
-			if (bits & E_EXTEND1)
-			{
-				MSG_WriteByte(msg, (bits >> 8) & 0xFF);
-				if (bits & E_EXTEND2)
-				{
-					MSG_WriteByte(msg, (bits >> 16) & 0xFF);
-					if (bits & E_EXTEND3)
-						MSG_WriteByte(msg, (bits >> 24) & 0xFF);
-				}
-			}
-			// LordHavoc: have to write flags first, as they can modify protocol
-			if (bits & E_FLAGS)
-				MSG_WriteByte(msg, ent->flags);
-			if (ent->flags & RENDER_LOWPRECISION)
-			{
-				if (bits & E_ORIGIN1)
-					MSG_WriteShort(msg, org[0]);
-				if (bits & E_ORIGIN2)
-					MSG_WriteShort(msg, org[1]);
-				if (bits & E_ORIGIN3)
-					MSG_WriteShort(msg, org[2]);
-			}
-			else
-			{
-				if (bits & E_ORIGIN1)
-					MSG_WriteFloat(msg, org[0]);
-				if (bits & E_ORIGIN2)
-					MSG_WriteFloat(msg, org[1]);
-				if (bits & E_ORIGIN3)
-					MSG_WriteFloat(msg, org[2]);
-			}
-			if (bits & E_ANGLE1)
-				MSG_WriteAngle(msg, ent->angles[0]);
-			if (bits & E_ANGLE2)
-				MSG_WriteAngle(msg, ent->angles[1]);
-			if (bits & E_ANGLE3)
-				MSG_WriteAngle(msg, ent->angles[2]);
-			if (bits & E_MODEL1)
-				MSG_WriteByte(msg, ent->modelindex & 0xFF);
-			if (bits & E_MODEL2)
-				MSG_WriteByte(msg, (ent->modelindex >> 8) & 0xFF);
-			if (bits & E_FRAME1)
-				MSG_WriteByte(msg, ent->frame & 0xFF);
-			if (bits & E_FRAME2)
-				MSG_WriteByte(msg, (ent->frame >> 8) & 0xFF);
-			if (bits & E_EFFECTS1)
-				MSG_WriteByte(msg, ent->effects & 0xFF);
-			if (bits & E_EFFECTS2)
-				MSG_WriteByte(msg, (ent->effects >> 8) & 0xFF);
-			if (bits & E_COLORMAP)
-				MSG_WriteByte(msg, ent->colormap);
-			if (bits & E_SKIN)
-				MSG_WriteByte(msg, ent->skin);
-			if (bits & E_ALPHA)
-				MSG_WriteByte(msg, ent->alpha);
-			if (bits & E_SCALE)
-				MSG_WriteByte(msg, ent->scale);
-			if (bits & E_GLOWSIZE)
-				MSG_WriteByte(msg, ent->glowsize);
-			if (bits & E_GLOWCOLOR)
-				MSG_WriteByte(msg, ent->glowcolor);
-			if (bits & E_TAGATTACHMENT)
-			{
-				MSG_WriteShort(msg, ent->tagentity);
-				MSG_WriteByte(msg, ent->tagindex);
-			}
-		}
-	}
-	else if (!delta->active)
-		MSG_WriteShort(msg, ent->number | 0x8000);
+	int i;
+	for (i = 0;protocolversioninfo[i].name;i++)
+		if (protocolversioninfo[i].version == p)
+			return protocolversioninfo[i].name;
+	return "UNKNOWN";
 }
 
-void EntityState_Read(entity_state_t *e, entity_state_t *delta, int number)
+protocolversion_t Protocol_EnumForNumber(int n)
 {
-	int bits;
-	memcpy(e, delta, sizeof(*e));
-	e->active = true;
-	e->time = cl.mtime[0];
-	e->number = number;
-
-	bits = MSG_ReadByte();
-	if (bits & E_EXTEND1)
-	{
-		bits |= MSG_ReadByte() << 8;
-		if (bits & E_EXTEND2)
-		{
-			bits |= MSG_ReadByte() << 16;
-			if (bits & E_EXTEND3)
-				bits |= MSG_ReadByte() << 24;
-		}
-	}
-
-	if (dpprotocol == DPPROTOCOL_VERSION2)
-	{
-		if (bits & E_ORIGIN1)
-			e->origin[0] = (signed short) MSG_ReadShort();
-		if (bits & E_ORIGIN2)
-			e->origin[1] = (signed short) MSG_ReadShort();
-		if (bits & E_ORIGIN3)
-			e->origin[2] = (signed short) MSG_ReadShort();
-	}
-	else
-	{
-		if (bits & E_FLAGS)
-			e->flags = MSG_ReadByte();
-		if (e->flags & RENDER_LOWPRECISION || dpprotocol == DPPROTOCOL_VERSION2)
-		{
-			if (bits & E_ORIGIN1)
-				e->origin[0] = (signed short) MSG_ReadShort();
-			if (bits & E_ORIGIN2)
-				e->origin[1] = (signed short) MSG_ReadShort();
-			if (bits & E_ORIGIN3)
-				e->origin[2] = (signed short) MSG_ReadShort();
-		}
-		else
-		{
-			if (bits & E_ORIGIN1)
-				e->origin[0] = MSG_ReadFloat();
-			if (bits & E_ORIGIN2)
-				e->origin[1] = MSG_ReadFloat();
-			if (bits & E_ORIGIN3)
-				e->origin[2] = MSG_ReadFloat();
-		}
-	}
-	if (bits & E_ANGLE1)
-		e->angles[0] = MSG_ReadAngle();
-	if (bits & E_ANGLE2)
-		e->angles[1] = MSG_ReadAngle();
-	if (bits & E_ANGLE3)
-		e->angles[2] = MSG_ReadAngle();
-	if (bits & E_MODEL1)
-		e->modelindex = (e->modelindex & 0xFF00) | (unsigned int) MSG_ReadByte();
-	if (bits & E_MODEL2)
-		e->modelindex = (e->modelindex & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
-	if (bits & E_FRAME1)
-		e->frame = (e->frame & 0xFF00) | (unsigned int) MSG_ReadByte();
-	if (bits & E_FRAME2)
-		e->frame = (e->frame & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
-	if (bits & E_EFFECTS1)
-		e->effects = (e->effects & 0xFF00) | (unsigned int) MSG_ReadByte();
-	if (bits & E_EFFECTS2)
-		e->effects = (e->effects & 0x00FF) | ((unsigned int) MSG_ReadByte() << 8);
-	if (bits & E_COLORMAP)
-		e->colormap = MSG_ReadByte();
-	if (bits & E_SKIN)
-		e->skin = MSG_ReadByte();
-	if (bits & E_ALPHA)
-		e->alpha = MSG_ReadByte();
-	if (bits & E_SCALE)
-		e->scale = MSG_ReadByte();
-	if (bits & E_GLOWSIZE)
-		e->glowsize = MSG_ReadByte();
-	if (bits & E_GLOWCOLOR)
-		e->glowcolor = MSG_ReadByte();
-	if (dpprotocol == DPPROTOCOL_VERSION2)
-		if (bits & E_FLAGS)
-			e->flags = MSG_ReadByte();
-	if (bits & E_TAGATTACHMENT)
-	{
-		e->tagentity = MSG_ReadShort();
-		e->tagindex = MSG_ReadByte();
-	}
+	int i;
+	for (i = 0;protocolversioninfo[i].name;i++)
+		if (protocolversioninfo[i].number == n)
+			return protocolversioninfo[i].version;
+	return PROTOCOL_UNKNOWN;
 }
 
-// (server) clears the database to contain no frames (thus delta compression compresses against nothing)
-void EntityFrame_ClearDatabase(entity_database_t *d)
+int Protocol_NumberForEnum(protocolversion_t p)
 {
-	memset(d, 0, sizeof(*d));
+	int i;
+	for (i = 0;protocolversioninfo[i].name;i++)
+		if (protocolversioninfo[i].version == p)
+			return protocolversioninfo[i].number;
+	return 0;
 }
 
-// (server and client) removes frames older than 'frame' from database
-void EntityFrame_AckFrame(entity_database_t *d, int frame)
+void Protocol_Names(char *buffer, size_t buffersize)
 {
 	int i;
-	if (d->ackframe < frame)
-		d->ackframe = frame;
-	for (i = 0;i < d->numframes && d->frames[i].framenum < frame;i++);
-	// ignore outdated frame acks (out of order packets)
-	if (i == 0)
+	if (buffersize < 1)
 		return;
-	d->numframes -= i;
-	// if some queue is left, slide it down to beginning of array
-	if (d->numframes)
-		memmove(&d->frames[0], &d->frames[i], sizeof(d->frames[0]) * d->numframes);
-}
-
-// (server) clears frame, to prepare for adding entities
-void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
-{
-	f->time = 0;
-	f->framenum = framenum;
-	f->numentities = 0;
-	if (eye == NULL)
-	{
-		VectorClear(f->eye);
-	}
-	else
+	buffer[0] = 0;
+	for (i = 0;protocolversioninfo[i].name;i++)
 	{
-		VectorCopy(eye, f->eye);
+		if (i > 0)
+			dp_strlcat(buffer, " ", buffersize);
+		dp_strlcat(buffer, protocolversioninfo[i].name, buffersize);
 	}
 }
 
-// (server) adds an entity to frame
-void EntityFrame_AddEntity(entity_frame_t *f, entity_state_t *s)
+void Protocol_UpdateClientStats(const int *stats)
 {
-	if (f->numentities < MAX_ENTITY_DATABASE)
-	{
-		f->entitydata[f->numentities] = *s;
-		f->entitydata[f->numentities++].active = true;
-	}
-}
-
-// (server and client) reads a frame from the database
-void EntityFrame_FetchFrame(entity_database_t *d, int framenum, entity_frame_t *f)
-{
-	int i, n;
-	EntityFrame_Clear(f, NULL, -1);
-	for (i = 0;i < d->numframes && d->frames[i].framenum < framenum;i++);
-	if (i < d->numframes && framenum == d->frames[i].framenum)
-	{
-		f->framenum = framenum;
-		f->numentities = d->frames[i].endentity - d->frames[i].firstentity;
-		n = MAX_ENTITY_DATABASE - (d->frames[i].firstentity % MAX_ENTITY_DATABASE);
-		if (n > f->numentities)
-			n = f->numentities;
-		memcpy(f->entitydata, d->entitydata + d->frames[i].firstentity % MAX_ENTITY_DATABASE, sizeof(*f->entitydata) * n);
-		if (f->numentities > n)
-			memcpy(f->entitydata + n, d->entitydata, sizeof(*f->entitydata) * (f->numentities - n));
-		VectorCopy(d->eye, f->eye);
-	}
-}
-
-// (server and client) adds a entity_frame to the database, for future reference
-void EntityFrame_AddFrame(entity_database_t *d, entity_frame_t *f)
-{
-	int n, e;
-	entity_frameinfo_t *info;
-
-	VectorCopy(f->eye, d->eye);
-
-	// figure out how many entity slots are used already
-	if (d->numframes)
-	{
-		n = d->frames[d->numframes - 1].endentity - d->frames[0].firstentity;
-		if (n + f->numentities > MAX_ENTITY_DATABASE || d->numframes >= MAX_ENTITY_HISTORY)
-		{
-			// ran out of room, dump database
-			EntityFrame_ClearDatabase(d);
-		}
-	}
-
-	info = &d->frames[d->numframes];
-	info->framenum = f->framenum;
-	e = -1000;
-	// make sure we check the newly added frame as well, but we haven't incremented numframes yet
-	for (n = 0;n <= d->numframes;n++)
+	int i;
+	// update the stats array and set deltabits for any changed stats
+	for (i = 0;i < MAX_CL_STATS;i++)
 	{
-		if (e >= d->frames[n].framenum)
+		if (host_client->stats[i] != stats[i])
 		{
-			if (e == f->framenum)
-				Con_Printf("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
-			else
-				Con_Printf("EntityFrame_AddFrame: out of sequence frames in database\n");
-			return;
+			host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
+			host_client->stats[i] = stats[i];
 		}
-		e = d->frames[n].framenum;
 	}
-	// if database still has frames after that...
-	if (d->numframes)
-		info->firstentity = d->frames[d->numframes - 1].endentity;
-	else
-		info->firstentity = 0;
-	info->endentity = info->firstentity + f->numentities;
-	d->numframes++;
-
-	n = info->firstentity % MAX_ENTITY_DATABASE;
-	e = MAX_ENTITY_DATABASE - n;
-	if (e > f->numentities)
-		e = f->numentities;
-	memcpy(d->entitydata + n, f->entitydata, sizeof(entity_state_t) * e);
-	if (f->numentities > e)
-		memcpy(d->entitydata, f->entitydata + e, sizeof(entity_state_t) * (f->numentities - e));
 }
 
-// (server) writes a frame to network stream
-static entity_frame_t deltaframe; // FIXME?
-void EntityFrame_Write(entity_database_t *d, entity_frame_t *f, sizebuf_t *msg)
+// only a few stats are within the 32 stat limit of Quake, and most of them
+// are sent every frame in svc_clientdata messages, so we only send the
+// remaining ones here
+static const int sendquakestats[] =
 {
-	int i, onum, number;
-	entity_frame_t *o = &deltaframe;
-	entity_state_t *ent, *delta, baseline;
+// quake did not send these secrets/monsters stats in this way, but doing so
+// allows a mod to increase STAT_TOTALMONSTERS during the game, and ensures
+// that STAT_SECRETS and STAT_MONSTERS are always correct (even if a client
+// didn't receive an svc_foundsecret or svc_killedmonster), which may be most
+// valuable if randomly seeking around in a demo
+STAT_TOTALSECRETS, // never changes during game
+STAT_TOTALMONSTERS, // changes in some mods
+STAT_SECRETS, // this makes svc_foundsecret unnecessary
+STAT_MONSTERS, // this makes svc_killedmonster unnecessary
+STAT_VIEWHEIGHT, // sent just for FTEQW clients
+STAT_VIEWZOOM, // this rarely changes
+-1,
+};
 
-	EntityFrame_AddFrame(d, f);
-
-	ClearStateToDefault(&baseline);
-	EntityFrame_FetchFrame(d, d->ackframe > 0 ? d->ackframe : -1, o);
-	MSG_WriteByte (msg, svc_entities);
-	MSG_WriteLong (msg, o->framenum);
-	MSG_WriteLong (msg, f->framenum);
-	MSG_WriteFloat (msg, f->eye[0]);
-	MSG_WriteFloat (msg, f->eye[1]);
-	MSG_WriteFloat (msg, f->eye[2]);
-
-	onum = 0;
-	for (i = 0;i < f->numentities;i++)
-	{
-		ent = f->entitydata + i;
-		number = ent->number;
-		for (;onum < o->numentities && o->entitydata[onum].number < number;onum++)
-		{
-			// write remove message
-			MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
-		}
-		if (onum < o->numentities && (o->entitydata[onum].number == number))
-		{
-			// delta from previous frame
-			delta = o->entitydata + onum;
-			// advance to next entity in delta frame
-			onum++;
-		}
-		else
-		{
-			// delta from baseline
-			delta = &baseline;
-		}
-		EntityState_Write(ent, msg, delta);
-	}
-	for (;onum < o->numentities;onum++)
-	{
-		// write remove message
-		MSG_WriteShort(msg, o->entitydata[onum].number | 0x8000);
-	}
-	MSG_WriteShort(msg, 0xFFFF);
-}
-
-// (client) reads a frame from network stream
-static entity_frame_t framedata; // FIXME?
-void EntityFrame_Read(entity_database_t *d)
+void Protocol_WriteStatsReliable(void)
 {
-	int number, removed;
-	entity_frame_t *f = &framedata, *delta = &deltaframe;
-	entity_state_t *e, baseline, *old, *oldend, *edelta;
-
-	ClearStateToDefault(&baseline);
-
-	EntityFrame_Clear(f, NULL, -1);
-
-	// read the frame header info
-	f->time = cl.mtime[0];
-	number = MSG_ReadLong();
-	f->framenum = MSG_ReadLong();
-	f->eye[0] = MSG_ReadFloat();
-	f->eye[1] = MSG_ReadFloat();
-	f->eye[2] = MSG_ReadFloat();
-	EntityFrame_AckFrame(d, number);
-	EntityFrame_FetchFrame(d, number, delta);
-	old = delta->entitydata;
-	oldend = old + delta->numentities;
-	// read entities until we hit the magic 0xFFFF end tag
-	while ((number = (unsigned short) MSG_ReadShort()) != 0xFFFF)
-	{
-		if (msg_badread)
-			Host_Error("EntityFrame_Read: read error\n");
-		removed = number & 0x8000;
-		number &= 0x7FFF;
-		if (number >= MAX_EDICTS)
-			Host_Error("EntityFrame_Read: number (%i) >= MAX_EDICTS (%i)\n", number, MAX_EDICTS);
-
-		// seek to entity, while copying any skipped entities (assume unchanged)
-		while (old < oldend && old->number < number)
-		{
-			if (f->numentities >= MAX_ENTITY_DATABASE)
-				Host_Error("EntityFrame_Read: entity list too big\n");
-			memcpy(f->entitydata + f->numentities, old, sizeof(entity_state_t));
-			f->entitydata[f->numentities].time = cl.mtime[0];
-			old++;
-			f->numentities++;
-		}
-		if (removed)
-		{
-			if (old < oldend && old->number == number)
-				old++;
-			else
-				Con_Printf("EntityFrame_Read: REMOVE on unused entity %i\n", number);
-		}
-		else
-		{
-			if (f->numentities >= MAX_ENTITY_DATABASE)
-				Host_Error("EntityFrame_Read: entity list too big\n");
-
-			// reserve this slot
-			e = f->entitydata + f->numentities++;
-
-			if (old < oldend && old->number == number)
+	int i, j;
+	if (!host_client->netconnection)
+		return;
+	// detect changes in stats and write reliable messages
+	// this only deals with 32 stats because the older protocols which use
+	// this function can only cope with 32 stats,
+	// they also do not support svc_updatestatubyte which was introduced in
+	// DP6 protocol (except for QW)
+	for (j = 0;sendquakestats[j] >= 0;j++)
+	{
+		i = sendquakestats[j];
+		// check if this bit is set
+		if (host_client->statsdeltabits[i >> 3] & (1 << (i & 7)))
+		{
+			host_client->statsdeltabits[i >> 3] -= (1 << (i & 7));
+			// send the stat as a byte if possible
+			if (sv.protocol == PROTOCOL_QUAKEWORLD)
 			{
-				// delta from old entity
-				edelta = old++;
+				if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
+				{
+					MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestat);
+					MSG_WriteByte(&host_client->netconnection->message, i);
+					MSG_WriteByte(&host_client->netconnection->message, host_client->stats[i]);
+				}
+				else
+				{
+					MSG_WriteByte(&host_client->netconnection->message, qw_svc_updatestatlong);
+					MSG_WriteByte(&host_client->netconnection->message, i);
+					MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
+				}
 			}
 			else
 			{
-				// delta from baseline
-				edelta = &baseline;
+				// this could make use of svc_updatestatubyte in DP6 and later
+				// protocols but those protocols do not use this function
+				MSG_WriteByte(&host_client->netconnection->message, svc_updatestat);
+				MSG_WriteByte(&host_client->netconnection->message, i);
+				MSG_WriteLong(&host_client->netconnection->message, host_client->stats[i]);
 			}
-
-			EntityState_Read(e, edelta, number);
 		}
 	}
-	while (old < oldend)
-	{
-		if (f->numentities >= MAX_ENTITY_DATABASE)
-			Host_Error("EntityFrame_Read: entity list too big\n");
-		memcpy(f->entitydata + f->numentities, old, sizeof(entity_state_t));
-		f->entitydata[f->numentities].time = cl.mtime[0];
-		old++;
-		f->numentities++;
-	}
-	EntityFrame_AddFrame(d, f);
-}
-
-
-// (client) returns the frame number of the most recent frame recieved
-int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d)
-{
-	if (d->numframes)
-		return d->frames[d->numframes - 1].framenum;
-	else
-		return -1;
 }
-
-
-
-
-
-
-static int EntityFrame4_SV_ChooseCommitToReplace(entity_database4_t *d)
-{
-	int i, best, bestframenum;
-	best = 0;
-	bestframenum = d->commit[0].framenum;
-	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-	{
-		if (!d->commit[i].numentities)
-			return i;
-		if (bestframenum > d->commit[i].framenum)
-		{
-			bestframenum = d->commit[i].framenum;
-			best = i;
-		}
-	}
-	return best;
-}
-
-static entity_state_t *EntityFrame4_GetReferenceEntity(entity_database4_t *d, int number)
-{
-	if (d->maxreferenceentities <= number)
-	{
-		int oldmax = d->maxreferenceentities;
-		entity_state_t *oldentity = d->referenceentity;
-		d->maxreferenceentities = (number + 15) & ~7;
-		d->referenceentity = Mem_Alloc(d->mempool, d->maxreferenceentities * sizeof(*d->referenceentity));
-		if (oldentity)
-		{
-			memcpy(d->referenceentity, oldentity, oldmax * sizeof(*d->referenceentity));
-			Mem_Free(oldentity);
-		}
-		// clear the newly created entities
-		for (;oldmax < d->maxreferenceentities;oldmax++)
-			ClearStateToDefault(d->referenceentity + oldmax);
-	}
-	return d->referenceentity + number;
-}
-
-static void EntityFrame4_AddCommitEntity(entity_database4_t *d, entity_state_t *s)
-{
-	// resize commit's entity list if full
-	if (d->currentcommit->maxentities <= d->currentcommit->numentities)
-	{
-		entity_state_t *oldentity = d->currentcommit->entity;
-		d->currentcommit->maxentities += 8;
-		d->currentcommit->entity = Mem_Alloc(d->mempool, d->currentcommit->maxentities * sizeof(*d->currentcommit->entity));
-		if (oldentity)
-		{
-			memcpy(d->currentcommit->entity, oldentity, d->currentcommit->numentities * sizeof(*d->currentcommit->entity));
-			Mem_Free(oldentity);
-		}
-	}
-	d->currentcommit->entity[d->currentcommit->numentities++] = *s;
-}
-
-entity_database4_t *EntityFrame4_AllocDatabase(mempool_t *pool)
-{
-	entity_database4_t *d;
-	d = Mem_Alloc(pool, sizeof(*d));
-	d->mempool = pool;
-	d->referenceframenum = -1;
-	return d;
-}
-
-void EntityFrame4_FreeDatabase(entity_database4_t *d)
-{
-	int i;
-	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-		if (d->commit[i].entity)
-			Mem_Free(d->commit[i].entity);
-	if (d->referenceentity)
-		Mem_Free(d->referenceentity);
-	Mem_Free(d);
-}
-
-void EntityFrame4_ResetDatabase(entity_database4_t *d)
-{
-	int i;
-	d->referenceframenum = -1;
-	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-		d->commit[i].numentities = 0;
-}
-
-void EntityFrame4_AckFrame(entity_database4_t *d, int framenum)
-{
-	int i, foundit = false;
-	// check if client is requesting no delta compression
-	if (framenum == -1)
-	{
-		EntityFrame4_ResetDatabase(d);
-		return;
-	}
-	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-	{
-		if (d->commit[i].numentities && d->commit[i].framenum <= framenum)
-		{
-			if (d->commit[i].framenum == framenum)
-			{
-				// apply commit to database
-				d->referenceframenum = d->commit[i].framenum;
-				while (d->commit[i].numentities--)
-					*EntityFrame4_GetReferenceEntity(d, d->commit[i].entity[d->commit[i].numentities].number) = d->commit[i].entity[d->commit[i].numentities];
-				foundit = true;
-			}
-			d->commit[i].numentities = 0;
-			d->commit[i].framenum = -1;
-		}
-	}
-	if (!foundit)
-		Con_DPrintf("EntityFrame4_AckFrame: frame %i not found in database, expect glitches!\n", framenum);
-}
-
-void EntityFrame4_SV_WriteFrame_Begin(entity_database4_t *d, sizebuf_t *msg, int framenum)
-{
-	d->currentcommit = d->commit + EntityFrame4_SV_ChooseCommitToReplace(d);
-	d->currentcommit->numentities = 0;
-	d->currentcommit->framenum = framenum;
-	MSG_WriteByte(msg, svc_entities);
-	MSG_WriteLong(msg, d->referenceframenum);
-	MSG_WriteLong(msg, d->currentcommit->framenum);
-}
-
-int EntityFrame4_SV_WriteFrame_Entity(entity_database4_t *d, sizebuf_t *msg, int maxbytes, entity_state_t *s)
-{
-	qbyte data[128];
-	sizebuf_t buf;
-	entity_state_t *e;
-	// prepare the buffer
-	memset(&buf, 0, sizeof(buf));
-	buf.data = data;
-	buf.maxsize = sizeof(data);
-	// make the message
-	e = EntityFrame4_GetReferenceEntity(d, s->number);
-	if (s->active)
-	{
-		// entity exists, send an update
-		EntityState_Write(s, &buf, e);
-	}
-	else if (e->active)
-	{
-		// entity used to exist but doesn't anymore, send remove
-		MSG_WriteShort(&buf, s->number | 0x8000);
-	}
-	// if the message is empty, skip out now
-	if (!buf.cursize)
-		return true;
-	// if the commit is full, we're done
-	if (msg->cursize + buf.cursize + 2 >= min(msg->maxsize, maxbytes))
-		return false;
-	// add the entity to the commit
-	EntityFrame4_AddCommitEntity(d, s);
-	// write the message to the packet
-	SZ_Write(msg, buf.data, buf.cursize);
-	// carry on
-	return true;
-}
-
-void EntityFrame4_SV_WriteFrame_End(entity_database4_t *d, sizebuf_t *msg)
-{
-	// remove world message (invalid, and thus a good terminator)
-	MSG_WriteShort(msg, 0x8000);
-	// just to be sure
-	d->currentcommit = NULL;
-}
-
-extern void CL_MoveLerpEntityStates(entity_t *ent);
-void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
-{
-	int i, n, number, referenceframenum, framenum;
-	referenceframenum = MSG_ReadLong();
-	framenum = MSG_ReadLong();
-	EntityFrame4_AckFrame(d, referenceframenum);
-	for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-		if (!d->commit[i].numentities)
-			break;
-	if (i < MAX_ENTITY_HISTORY)
-	{
-		d->currentcommit = d->commit + i;
-		d->currentcommit->framenum = framenum;
-		d->currentcommit->numentities = 0;
-	}
-	else
-	{
-		Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, resetting, expect glitches!!\n", framenum);
-		d->currentcommit = NULL;
-		EntityFrame4_ResetDatabase(d);
-	}
-	while((n = MSG_ReadShort()) != 0x8000)
-	{
-		number = n & 0x7FFF;
-		cl_entities[number].state_previous = cl_entities[number].state_current;
-		if (number & 0x8000)
-		{
-			ClearStateToDefault(&cl_entities[number].state_current);
-			cl_entities[number].state_current.active = false;
-			cl_entities[number].state_current.number = number;
-		}
-		else
-			EntityState_Read(&cl_entities[number].state_current, EntityFrame4_GetReferenceEntity(d, number), number);
-		CL_MoveLerpEntityStates(&cl_entities[number]);
-		cl_entities_active[number] = true;
-		if (d->currentcommit)
-			EntityFrame4_AddCommitEntity(d, &cl_entities[number].state_current);
-	}
-	d->currentcommit = NULL;
-}
-