]> git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - protocol.c
sys_win: Delete sys_win and conproc. We no longer use these.
[xonotic/darkplaces.git] / protocol.c
index 66076b6de4f0b8f4e1ec0bce3ad15a0e13577bc9..5685675562e0e51096425f306fcbf741129f09f2 100644 (file)
-
 #include "quakedef.h"
 
+// this is 88 bytes (must match entity_state_t in protocol.h)
 entity_state_t defaultstate =
 {
-       0,//double time; // time this state was built
-       {0,0,0},//vec3_t origin;
-       {0,0,0},//vec3_t angles;
-       0,//int number; // entity number this state is for
-       0,//unsigned short active; // true if a valid state
+       // ! 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 effects;
        0,//unsigned short tagentity;
-       0,//unsigned short specialvisibilityradius;
-       0,//unsigned short viewmodelforclient;
-       0,//unsigned short exteriormodelforclient;
-       0,//unsigned short nodrawtoclient;
-       0,//unsigned short drawonlytoclient;
-       {0,0,0,0},//short light[4];
-       0,//qbyte lightstyle;
-       0,//qbyte lightpflags;
-       0,//qbyte colormap;
-       0,//qbyte skin;
-       255,//qbyte alpha;
-       16,//qbyte scale;
-       0,//qbyte glowsize;
-       254,//qbyte glowcolor;
-       0,//qbyte flags;
-       0,//qbyte tagindex;
-       {0,0,0,0,0,0}//qbyte unused[6];
+       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];
 };
 
-void ClearStateToDefault(entity_state_t *s)
-{
-       *s = defaultstate;
-       /*
-       memset(s, 0, sizeof(*s));
-       s->alpha = 255;
-       s->scale = 16;
-       s->glowcolor = 254;
-       */
-}
-
-void EntityState_Write(entity_state_t *ent, sizebuf_t *msg, entity_state_t *delta)
-{
-       int bits;
-       vec3_t org, deltaorg;
-       if (ent->active)
-       {
-               // if not active last frame, delta from defaults
-               if (!delta->active)
-                       delta = &defaultstate;
-               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 (ent->light[0] != delta->light[0] || ent->light[1] != delta->light[1] || ent->light[2] != delta->light[2] || ent->light[3] != delta->light[3])
-                       bits |= E_LIGHT;
-               if (ent->lightstyle != delta->lightstyle)
-                       bits |= E_LIGHTSTYLE;
-               if (ent->lightpflags != delta->lightpflags)
-                       bits |= E_LIGHTPFLAGS;
-
-               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]);
-                               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]);
-                       }
-                       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_WritePreciseAngle(msg, ent->angles[0]);
-                               if (bits & E_ANGLE2)
-                                       MSG_WritePreciseAngle(msg, ent->angles[1]);
-                               if (bits & E_ANGLE3)
-                                       MSG_WritePreciseAngle(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);
-                       }
-                       if (bits & E_LIGHT)
-                       {
-                               MSG_WriteShort(msg, ent->light[0]);
-                               MSG_WriteShort(msg, ent->light[1]);
-                               MSG_WriteShort(msg, ent->light[2]);
-                               MSG_WriteShort(msg, ent->light[3]);
-                       }
-                       if (bits & E_LIGHTSTYLE)
-                               MSG_WriteByte(msg, ent->lightstyle);
-                       if (bits & E_LIGHTPFLAGS)
-                               MSG_WriteByte(msg, ent->lightpflags);
-               }
-       }
-       else if (delta->active)
-               MSG_WriteShort(msg, ent->number | 0x8000);
-}
-
-void EntityState_ReadUpdate(entity_state_t *e, int number)
-{
-       int bits;
-       cl_entities_active[number] = true;
-       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 (cl.protocol == PROTOCOL_DARKPLACES2)
-       {
-               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 || cl.protocol == PROTOCOL_DARKPLACES2)
-               {
-                       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 (cl.protocol == PROTOCOL_DARKPLACES5 && !(e->flags & RENDER_LOWPRECISION))
-       {
-               if (bits & E_ANGLE1)
-                       e->angles[0] = MSG_ReadPreciseAngle();
-               if (bits & E_ANGLE2)
-                       e->angles[1] = MSG_ReadPreciseAngle();
-               if (bits & E_ANGLE3)
-                       e->angles[2] = MSG_ReadPreciseAngle();
-       }
-       else
-       {
-               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 (cl.protocol == PROTOCOL_DARKPLACES2)
-               if (bits & E_FLAGS)
-                       e->flags = MSG_ReadByte();
-       if (bits & E_TAGATTACHMENT)
-       {
-               e->tagentity = MSG_ReadShort();
-               e->tagindex = MSG_ReadByte();
-       }
-       if (bits & E_LIGHT)
-       {
-               e->light[0] = MSG_ReadShort();
-               e->light[1] = MSG_ReadShort();
-               e->light[2] = MSG_ReadShort();
-               e->light[3] = MSG_ReadShort();
-       }
-       if (bits & E_LIGHTSTYLE)
-               e->lightstyle = MSG_ReadByte();
-       if (bits & E_LIGHTPFLAGS)
-               e->lightpflags = MSG_ReadByte();
-
-       if (developer_networkentities.integer >= 2)
-       {
-               Con_Printf("ReadUpdate e%i", number);
-
-               if (bits & E_ORIGIN1)
-                       Con_Printf(" E_ORIGIN1 %f", e->origin[0]);
-               if (bits & E_ORIGIN2)
-                       Con_Printf(" E_ORIGIN2 %f", e->origin[1]);
-               if (bits & E_ORIGIN3)
-                       Con_Printf(" E_ORIGIN3 %f", e->origin[2]);
-               if (bits & E_ANGLE1)
-                       Con_Printf(" E_ANGLE1 %f", e->angles[0]);
-               if (bits & E_ANGLE2)
-                       Con_Printf(" E_ANGLE2 %f", e->angles[1]);
-               if (bits & E_ANGLE3)
-                       Con_Printf(" E_ANGLE3 %f", e->angles[2]);
-               if (bits & (E_MODEL1 | E_MODEL2))
-                       Con_Printf(" E_MODEL %i", e->modelindex);
-
-               if (bits & (E_FRAME1 | E_FRAME2))
-                       Con_Printf(" E_FRAME %i", e->frame);
-               if (bits & (E_EFFECTS1 | E_EFFECTS2))
-                       Con_Printf(" E_EFFECTS %i", e->effects);
-               if (bits & E_ALPHA)
-                       Con_Printf(" E_ALPHA %f", e->alpha / 255.0f);
-               if (bits & E_SCALE)
-                       Con_Printf(" E_SCALE %f", e->scale / 16.0f);
-               if (bits & E_COLORMAP)
-                       Con_Printf(" E_COLORMAP %i", e->colormap);
-               if (bits & E_SKIN)
-                       Con_Printf(" E_SKIN %i", e->skin);
-
-               if (bits & E_GLOWSIZE)
-                       Con_Printf(" E_GLOWSIZE %i", e->glowsize * 4);
-               if (bits & E_GLOWCOLOR)
-                       Con_Printf(" E_GLOWCOLOR %i", e->glowcolor);
-               
-               if (bits & E_LIGHT)
-                       Con_Printf(" E_LIGHT %i:%i:%i:%i", e->light[0], e->light[1], e->light[2], e->light[3]);
-               if (bits & E_LIGHTPFLAGS)                       
-                       Con_Printf(" E_LIGHTPFLAGS %i", e->lightpflags);
-
-               if (bits & E_TAGATTACHMENT)
-                       Con_Printf(" E_TAGATTACHMENT e%i:%i", e->tagentity, e->tagindex);
-               if (bits & E_LIGHTSTYLE)
-                       Con_Printf(" E_LIGHTSTYLE %i", e->lightstyle);
-               Con_Print("\n");
-       }
-}
-
-// (server) clears the database to contain no frames (thus delta compression compresses against nothing)
-void EntityFrame_ClearDatabase(entity_database_t *d)
-{
-       memset(d, 0, sizeof(*d));
-}
+// 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}
+};
 
-// (server and client) removes frames older than 'frame' from database
-void EntityFrame_AckFrame(entity_database_t *d, int frame)
+protocolversion_t Protocol_EnumForName(const char *s)
 {
        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)
-               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);
+       for (i = 0;protocolversioninfo[i].name;i++)
+               if (!strcasecmp(s, protocolversioninfo[i].name))
+                       return protocolversioninfo[i].version;
+       return PROTOCOL_UNKNOWN;
 }
 
-// (server) clears frame, to prepare for adding entities
-void EntityFrame_Clear(entity_frame_t *f, vec3_t eye, int framenum)
+const char *Protocol_NameForEnum(protocolversion_t p)
 {
-       f->time = 0;
-       f->framenum = framenum;
-       f->numentities = 0;
-       if (eye == NULL)
-       {
-               VectorClear(f->eye);
-       }
-       else
-       {
-               VectorCopy(eye, f->eye);
-       }
-}
-
-// (server) adds an entity to frame
-void EntityFrame_AddEntity(entity_frame_t *f, entity_state_t *s)
-{
-       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++)
-       {
-               if (e >= d->frames[n].framenum)
-               {
-                       if (e == f->framenum)
-                               Con_Print("EntityFrame_AddFrame: tried to add out of sequence frame to database\n");
-                       else
-                               Con_Print("EntityFrame_AddFrame: out of sequence frames in database\n");
-                       return;
-               }
-               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)
-{
-       int i, onum, number;
-       entity_frame_t *o = &deltaframe;
-       entity_state_t *ent, *delta;
-
-       EntityFrame_AddFrame(d, f);
-
-       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 defaults
-                       delta = &defaultstate;
-               }
-               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)
-{
-       int number, removed;
-       entity_frame_t *f = &framedata, *delta = &deltaframe;
-       entity_state_t *e, *old, *oldend;
-
-       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");
-                       f->entitydata[f->numentities] = *old++;
-                       f->entitydata[f->numentities++].time = cl.mtime[0];
-               }
-               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)
-                       {
-                               // delta from old entity
-                               *e = *old++;
-                       }
-                       else
-                       {
-                               // delta from defaults
-                               *e = defaultstate;
-                       }
-
-                       EntityState_ReadUpdate(e, number);
-               }
-       }
-       while (old < oldend)
-       {
-               if (f->numentities >= MAX_ENTITY_DATABASE)
-                       Host_Error("EntityFrame_Read: entity list too big\n");
-               f->entitydata[f->numentities] = *old++;
-               f->entitydata[f->numentities++].time = cl.mtime[0];
-       }
-       EntityFrame_AddFrame(d, f);
+       int i;
+       for (i = 0;protocolversioninfo[i].name;i++)
+               if (protocolversioninfo[i].version == p)
+                       return protocolversioninfo[i].name;
+       return "UNKNOWN";
 }
 
-
-// (client) returns the frame number of the most recent frame recieved
-int EntityFrame_MostRecentlyRecievedFrameNum(entity_database_t *d)
+protocolversion_t Protocol_EnumForNumber(int n)
 {
-       if (d->numframes)
-               return d->frames[d->numframes - 1].framenum;
-       else
-               return -1;
+       int i;
+       for (i = 0;protocolversioninfo[i].name;i++)
+               if (protocolversioninfo[i].number == n)
+                       return protocolversioninfo[i].version;
+       return PROTOCOL_UNKNOWN;
 }
 
-
-
-
-
-
-entity_state_t *EntityFrame4_GetReferenceEntity(entity_database4_t *d, int number)
+int Protocol_NumberForEnum(protocolversion_t p)
 {
-       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++)
-               {
-                       d->referenceentity[oldmax] = defaultstate;
-                       d->referenceentity[oldmax].number = oldmax;
-               }
-       }
-       return d->referenceentity + number;
+       int i;
+       for (i = 0;protocolversioninfo[i].name;i++)
+               if (protocolversioninfo[i].version == p)
+                       return protocolversioninfo[i].number;
+       return 0;
 }
 
-void EntityFrame4_AddCommitEntity(entity_database4_t *d, entity_state_t *s)
+void Protocol_Names(char *buffer, size_t buffersize)
 {
-       // resize commit's entity list if full
-       if (d->currentcommit->maxentities <= d->currentcommit->numentities)
+       int i;
+       if (buffersize < 1)
+               return;
+       buffer[0] = 0;
+       for (i = 0;protocolversioninfo[i].name;i++)
        {
-               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);
-               }
+               if (i > 1)
+                       strlcat(buffer, " ", buffersize);
+               strlcat(buffer, protocolversioninfo[i].name, buffersize);
        }
-       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;
-       EntityFrame4_ResetDatabase(d);
-       d->ackframenum = -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)
+void Protocol_UpdateClientStats(const int *stats)
 {
        int i;
-       d->referenceframenum = -1;
-       for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-               d->commit[i].numentities = 0;
-       for (i = 0;i < d->maxreferenceentities;i++)
-               d->referenceentity[i] = defaultstate;
-}
-
-int EntityFrame4_AckFrame(entity_database4_t *d, int framenum)
-{
-       int i, j, found = false;
-       entity_database4_commit_t *commit;
-       if (framenum == -1)
-       {
-               EntityFrame4_ResetDatabase(d);
-               return true;
-       }
-       if (d->referenceframenum == framenum)
-               return true;
-       for (i = 0, commit = d->commit;i < MAX_ENTITY_HISTORY;i++, commit++)
+       // update the stats array and set deltabits for any changed stats
+       for (i = 0;i < MAX_CL_STATS;i++)
        {
-               if (commit->numentities && commit->framenum <= framenum)
+               if (host_client->stats[i] != stats[i])
                {
-                       if (commit->framenum == framenum)
-                       {
-                               found = true;
-                               d->referenceframenum = framenum;
-                               if (developer_networkentities.integer >= 3)
-                               {
-                                       for (j = 0;j < commit->numentities;j++)
-                                       {
-                                               entity_state_t *s = EntityFrame4_GetReferenceEntity(d, commit->entity[j].number);
-                                               if (commit->entity[j].active != s->active)
-                                               {
-                                                       if (commit->entity[j].active)
-                                                               Con_Printf("commit entity %i has become active (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
-                                                       else
-                                                               Con_Printf("commit entity %i has become inactive (modelindex %i)\n", commit->entity[j].number, commit->entity[j].modelindex);
-                                               }
-                                               *s = commit->entity[j];
-                                       }
-                               }
-                               else
-                                       for (j = 0;j < commit->numentities;j++)
-                                               *EntityFrame4_GetReferenceEntity(d, commit->entity[j].number) = commit->entity[j];
-                       }
-                       commit->numentities = 0;
+                       host_client->statsdeltabits[i >> 3] |= 1 << (i & 7);
+                       host_client->stats[i] = stats[i];
                }
        }
-       return found;
 }
 
-int EntityFrame4_SV_WriteFrame_Entity(entity_database4_t *d, sizebuf_t *msg, int maxbytes, entity_state_t *s)
+// 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[] =
 {
-       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);
-       // send an update (may update or remove the entity)
-       EntityState_Write(s, &buf, e);
-       // 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;
-}
+// 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,
+};
 
-extern void CL_MoveLerpEntityStates(entity_t *ent);
-void EntityFrame4_CL_ReadFrame(entity_database4_t *d)
+void Protocol_WriteStatsReliable(void)
 {
-       int i, n, cnumber, referenceframenum, framenum, enumber, done, stopnumber, skip = false;
-       // read the number of the frame this refers to
-       referenceframenum = MSG_ReadLong();
-       // read the number of this frame
-       framenum = MSG_ReadLong();
-       // read the start number
-       enumber = MSG_ReadShort();
-       if (developer_networkentities.integer >= 1)
-       {
-               Con_Printf("recv svc_entities ref:%i num:%i (database: ref:%i commits:", referenceframenum, framenum, d->referenceframenum);
-               for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-                       if (d->commit[i].numentities)
-                               Con_Printf(" %i", d->commit[i].framenum);
-               Con_Print("\n");
-       }
-       if (!EntityFrame4_AckFrame(d, referenceframenum))
-       {
-               Con_Print("EntityFrame4_CL_ReadFrame: reference frame invalid (VERY BAD ERROR), this update will be skipped\n");
-               skip = true;
-               d->ackframenum = -1;
-               EntityFrame4_ResetDatabase(d);
-       }
-       d->currentcommit = NULL;
-       for (i = 0;i < MAX_ENTITY_HISTORY;i++)
-       {
-               if (!d->commit[i].numentities)
-               {
-                       d->currentcommit = d->commit + i;
-                       d->currentcommit->framenum = d->ackframenum = framenum;
-                       d->currentcommit->numentities = 0;
-               }
-       }
-       if (d->currentcommit == NULL)
-       {
-               Con_Printf("EntityFrame4_CL_ReadFrame: error while decoding frame %i: database full, reading but not storing this update\n", framenum);
-               skip = true;
-       }
-       done = false;
-       while (!done && !msg_badread)
-       {
-               // read the number of the modified entity
-               // (gaps will be copied unmodified)
-               n = (unsigned short)MSG_ReadShort();
-               if (n == 0x8000)
-               {
-                       // no more entities in this update, but we still need to copy the
-                       // rest of the reference entities (final gap)
-                       done = true;
-                       // read end of range number, then process normally
-                       n = (unsigned short)MSG_ReadShort();
-               }
-               // high bit means it's a remove message
-               cnumber = n & 0x7FFF;
-               // add one (the changed one) if not done
-               stopnumber = cnumber + !done;
-               // process entities in range from the last one to the changed one
-               for (;enumber < stopnumber;enumber++)
-               {
-                       if (skip)
-                       {
-                               if (enumber == cnumber && (n & 0x8000) == 0)
-                               {
-                                       entity_state_t tempstate;
-                                       EntityState_ReadUpdate(&tempstate, enumber);
-                               }
-                               continue;
-                       }
-                       // slide the current into the previous slot
-                       cl_entities[enumber].state_previous = cl_entities[enumber].state_current;
-                       // copy a new current from reference database
-                       cl_entities[enumber].state_current = *EntityFrame4_GetReferenceEntity(d, enumber);
-                       // if this is the one to modify, read more data...
-                       if (enumber == cnumber)
+       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)
                        {
-                               if (n & 0x8000)
+                               if (host_client->stats[i] >= 0 && host_client->stats[i] < 256)
                                {
-                                       // simply removed
-                                       if (developer_networkentities.integer >= 2)
-                                               Con_Printf("entity %i: remove\n", enumber);
-                                       cl_entities[enumber].state_current = defaultstate;
+                                       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
                                {
-                                       // read the changes
-                                       if (developer_networkentities.integer >= 2)
-                                               Con_Printf("entity %i: update\n", enumber);
-                                       EntityState_ReadUpdate(&cl_entities[enumber].state_current, enumber);
+                                       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 if (developer_networkentities.integer >= 4)
-                               Con_Printf("entity %i: copy\n", enumber);
-                       // fix the number (it gets wiped occasionally by copying from defaultstate)
-                       cl_entities[enumber].state_current.number = enumber;
-                       // check if we need to update the lerp stuff
-                       if (cl_entities[enumber].state_current.active)
-                       {
-                               CL_MoveLerpEntityStates(&cl_entities[enumber]);
-                               cl_entities_active[enumber] = true;
-                       }
-                       // add this to the commit entry whether it is modified or not
-                       if (d->currentcommit)
-                               EntityFrame4_AddCommitEntity(d, &cl_entities[enumber].state_current);
-                       // print extra messages if desired
-                       if (developer_networkentities.integer >= 2 && cl_entities[enumber].state_current.active != cl_entities[enumber].state_previous.active)
+                       else
                        {
-                               if (cl_entities[enumber].state_current.active)
-                                       Con_Printf("entity #%i has become active\n", enumber);
-                               else if (cl_entities[enumber].state_previous.active)
-                                       Con_Printf("entity #%i has become inactive\n", enumber);
+                               // 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]);
                        }
                }
        }
-       d->currentcommit = NULL;
 }
-
-