]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - protocol.c
ZQ_PAUSE extension patch from GreEn`mArine
[xonotic/darkplaces.git] / protocol.c
index 3ffdd43e18084a205dce9d1f04fd8fcb25d7d1fc..f57ff66ae255b02a7ea87eb32520ae697e9115d3 100644 (file)
@@ -1,6 +1,22 @@
-
 #include "quakedef.h"
 
+#define ENTITYSIZEPROFILING_START(msg, num) \
+       int entityprofiling_startsize = msg->cursize
+
+#define ENTITYSIZEPROFILING_END(msg, num) \
+       if(developer_networkentities.integer >= 2) \
+       { \
+               prvm_edict_t *ed = prog->edicts + num; \
+               const char *cname = "(no classname)"; \
+               if(prog->fieldoffsets.classname >= 0) \
+               { \
+                       string_t handle =  PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.classname)->string; \
+                       if (handle) \
+                               cname = PRVM_GetString(handle); \
+               } \
+               Con_Printf("sent entity update of size %d for a %s\n", (msg->cursize - entityprofiling_startsize), cname); \
+       }
+
 // this is 88 bytes (must match entity_state_t in protocol.h)
 entity_state_t defaultstate =
 {
@@ -247,12 +263,174 @@ void EntityFrameQuake_ISeeDeadEntities(void)
        }
 }
 
-// FIXME FIXME FIXME: at this time the CSQC entity writing does not store
-// packet logs and thus if an update is lost it is never repeated, this makes
-// csqc entities useless at the moment.
+// NOTE: this only works with DP5 protocol and upwards. For lower protocols
+// (including QUAKE), no packet loss handling for CSQC is done, which makes
+// CSQC basically useless.
+// Always use the DP5 protocol, or a higher one, when using CSQC entities.
+static void EntityFrameCSQC_LostAllFrames(client_t *client)
+{
+       // mark ALL csqc entities as requiring a FULL resend!
+       // I know this is a bad workaround, but better than nothing.
+       int i, n;
+       prvm_eval_t *val;
+       prvm_edict_t *ed;
+
+       if(prog->fieldoffsets.SendEntity < 0 || prog->fieldoffsets.Version < 0)
+               return;
+
+       n = client->csqcnumedicts;
+       for(i = 0; i < n; ++i)
+       {
+               if(client->csqcentityglobalhistory[i])
+               {
+                       ed = prog->edicts + i;
+                       val = PRVM_EDICTFIELDVALUE(ed, prog->fieldoffsets.SendEntity);
+                       if (val->function)
+                               client->csqcentitysendflags[i] |= 0xFFFFFF; // FULL RESEND
+                       else // if it was ever sent to that client as a CSQC entity
+                       {
+                               client->csqcentityscope[i] = 1; // REMOVE
+                               client->csqcentitysendflags[i] |= 0xFFFFFF;
+                       }
+               }
+       }
+}
+void EntityFrameCSQC_LostFrame(client_t *client, int framenum)
+{
+       // marks a frame as lost
+       int i, j, n;
+       qboolean valid;
+       int ringfirst, ringlast;
+       int recoversendflags[MAX_EDICTS];
+       csqcentityframedb_t *d;
+
+       n = client->csqcnumedicts;
+
+       // is our frame out of history?
+       ringfirst = client->csqcentityframehistory_next; // oldest entry
+       ringlast = (ringfirst + NUM_CSQCENTITYDB_FRAMES - 1) % NUM_CSQCENTITYDB_FRAMES; // most recently added entry
+
+       valid = false;
+       
+       for(j = 0; j < NUM_CSQCENTITYDB_FRAMES; ++j)
+       {
+               d = &client->csqcentityframehistory[(ringfirst + j) % NUM_CSQCENTITYDB_FRAMES];
+               if(d->framenum < 0)
+                       continue;
+               if(d->framenum == framenum)
+                       break;
+               else if(d->framenum < framenum)
+                       valid = true;
+       }
+       if(j == NUM_CSQCENTITYDB_FRAMES)
+       {
+               if(valid) // got beaten, i.e. there is a frame < framenum
+               {
+                       // a non-csqc frame got lost... great
+                       return;
+               }
+               else
+               {
+                       // a too old frame got lost... sorry, cannot handle this
+                       Con_DPrintf("CSQC entity DB: lost a frame too early to do any handling (resending ALL)...\n");
+                       Con_DPrintf("Lost frame = %d\n", framenum);
+                       Con_DPrintf("Entity DB = %d to %d\n", client->csqcentityframehistory[ringfirst].framenum, client->csqcentityframehistory[ringlast].framenum);
+                       EntityFrameCSQC_LostAllFrames(client);
+               }
+               return;
+       }
+
+       // so j is the frame that got lost
+       // ringlast is the frame that we have to go to
+       ringfirst = (ringfirst + j) % NUM_CSQCENTITYDB_FRAMES;
+       if(ringlast < ringfirst)
+               ringlast += NUM_CSQCENTITYDB_FRAMES;
+       
+       memset(recoversendflags, 0, sizeof(recoversendflags));
+
+       for(j = ringfirst; j <= ringlast; ++j)
+       {
+               d = &client->csqcentityframehistory[j % NUM_CSQCENTITYDB_FRAMES];
+               if(d->framenum < 0)
+               {
+                       // deleted frame
+               }
+               else if(d->framenum < framenum)
+               {
+                       // a frame in the past... should never happen
+                       Con_Printf("CSQC entity DB encountered a frame from the past when recovering from PL...?\n");
+               }
+               else if(d->framenum == framenum)
+               {
+                       // handling the actually lost frame now
+                       for(i = 0; i < d->num; ++i)
+                       {
+                               int sf = d->sendflags[i];
+                               int ent = d->entno[i];
+                               if(sf < 0) // remove
+                                       recoversendflags[ent] |= -1; // all bits, including sign
+                               else if(sf > 0)
+                                       recoversendflags[ent] |= sf;
+                       }
+               }
+               else
+               {
+                       // handling the frames that followed it now
+                       for(i = 0; i < d->num; ++i)
+                       {
+                               int sf = d->sendflags[i];
+                               int ent = d->entno[i];
+                               if(sf < 0) // remove
+                               {
+                                       recoversendflags[ent] = 0; // no need to update, we got a more recent remove (and will fix it THEN)
+                                       break; // no flags left to remove...
+                               }
+                               else if(sf > 0)
+                                       recoversendflags[ent] &= ~sf; // no need to update these bits, we already got them later
+                       }
+               }
+       }
+
+       for(i = 0; i < client->csqcnumedicts; ++i)
+       {
+               if(recoversendflags[i] < 0)
+               {
+                       // a remove got lost, then either send a remove or - if it was
+                       // recreated later - a FULL update to make totally sure
+                       client->csqcentityscope[i] = 1;
+                       client->csqcentitysendflags[i] = 0xFFFFFF;
+               }
+               else
+                       client->csqcentitysendflags[i] |= recoversendflags[i];
+       }
+}
+static int EntityFrameCSQC_AllocFrame(client_t *client, int framenum)
+{
+       int ringfirst = client->csqcentityframehistory_next; // oldest entry
+       client->csqcentityframehistory_next += 1;
+       client->csqcentityframehistory_next %= NUM_CSQCENTITYDB_FRAMES;
+       client->csqcentityframehistory[ringfirst].framenum = framenum;
+       client->csqcentityframehistory[ringfirst].num = 0;
+       return ringfirst;
+}
+static void EntityFrameCSQC_DeallocFrame(client_t *client, int framenum)
+{
+       int ringfirst = client->csqcentityframehistory_next; // oldest entry
+       int ringlast = (ringfirst + NUM_CSQCENTITYDB_FRAMES - 1) % NUM_CSQCENTITYDB_FRAMES; // most recently added entry
+       if(framenum == client->csqcentityframehistory[ringlast].framenum)
+       {
+               client->csqcentityframehistory[ringlast].framenum = -1;
+               client->csqcentityframehistory[ringlast].num = 0;
+               client->csqcentityframehistory_next = ringlast;
+       }
+       else
+               Con_Printf("Trying to dealloc the wrong entity frame\n");
+}
 
 //[515]: we use only one array per-client for SendEntity feature
-void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, const entity_state_t *states)
+// TODO: add some handling for entity send priorities, to better deal with huge
+// amounts of csqc networked entities
+qboolean EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, const entity_state_t *states, int framenum)
 {
        int num, number, end, sendflags;
        qboolean sectionstarted = false;
@@ -260,15 +438,19 @@ void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, con
        prvm_edict_t *ed;
        prvm_eval_t *val;
        client_t *client = svs.clients + sv.writeentitiestoclient_clientnumber;
+       int dbframe = EntityFrameCSQC_AllocFrame(client, framenum);
+       csqcentityframedb_t *db = &client->csqcentityframehistory[dbframe];
+
+       maxsize -= 24; // always fit in an empty svc_entities message (for packet loss detection!)
 
        // if this server progs is not CSQC-aware, return early
        if(prog->fieldoffsets.SendEntity < 0 || prog->fieldoffsets.Version < 0)
-               return;
+               return false;
 
        // make sure there is enough room to store the svc_csqcentities byte,
        // the terminator (0x0000) and at least one entity update
        if (msg->cursize + 32 >= maxsize)
-               return;
+               return false;
 
        if (client->csqcnumedicts < prog->num_edicts)
                client->csqcnumedicts = prog->num_edicts;
@@ -332,6 +514,8 @@ void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, con
                sendflags = client->csqcentitysendflags[number];
                if (!sendflags)
                        continue;
+               if(db->num >= NUM_CSQCENTITIES_PER_FRAME)
+                       break;
                ed = prog->edicts + number;
                // entity scope is either update (2) or remove (1)
                if (client->csqcentityscope[number] == 1)
@@ -344,9 +528,17 @@ void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, con
                                MSG_WriteByte(msg, svc_csqcentities);
                        }
                        // write the remove message
-                       MSG_WriteShort(msg, (unsigned short)number | 0x8000);
-                       client->csqcentityscope[number] = 0;
-                       client->csqcentitysendflags[number] = 0xFFFFFF; // resend completely if it becomes active again
+                       {
+                               ENTITYSIZEPROFILING_START(msg, number);
+                               MSG_WriteShort(msg, (unsigned short)number | 0x8000);
+                               client->csqcentityscope[number] = 0;
+                               client->csqcentitysendflags[number] = 0xFFFFFF; // resend completely if it becomes active again
+                               db->entno[db->num] = number;
+                               db->sendflags[db->num] = -1;
+                               db->num += 1;
+                               client->csqcentityglobalhistory[number] = 1;
+                               ENTITYSIZEPROFILING_END(msg, number);
+                       }
                        if (msg->cursize + 17 >= maxsize)
                                break;
                }
@@ -361,23 +553,31 @@ void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, con
                        {
                                if(!sectionstarted)
                                        MSG_WriteByte(msg, svc_csqcentities);
-                               MSG_WriteShort(msg, number);
-                               msg->allowoverflow = true;
-                               PRVM_G_INT(OFS_PARM0) = sv.writeentitiestoclient_cliententitynumber;
-                               PRVM_G_FLOAT(OFS_PARM1) = sendflags;
-                               prog->globals.server->self = number;
-                               PRVM_ExecuteProgram(val->function, "Null SendEntity\n");
-                               msg->allowoverflow = false;
-                               if(PRVM_G_FLOAT(OFS_RETURN) && msg->cursize + 2 <= maxsize)
                                {
-                                       // an update has been successfully written
-                                       client->csqcentitysendflags[number] = 0;
-                                       // and take note that we have begun the svc_csqcentities
-                                       // section of the packet
-                                       sectionstarted = 1;
-                                       if (msg->cursize + 17 >= maxsize)
-                                               break;
-                                       continue;
+                                       ENTITYSIZEPROFILING_START(msg, number);
+                                       MSG_WriteShort(msg, number);
+                                       msg->allowoverflow = true;
+                                       PRVM_G_INT(OFS_PARM0) = sv.writeentitiestoclient_cliententitynumber;
+                                       PRVM_G_FLOAT(OFS_PARM1) = sendflags;
+                                       prog->globals.server->self = number;
+                                       PRVM_ExecuteProgram(val->function, "Null SendEntity\n");
+                                       msg->allowoverflow = false;
+                                       if(PRVM_G_FLOAT(OFS_RETURN) && msg->cursize + 2 <= maxsize)
+                                       {
+                                               // an update has been successfully written
+                                               client->csqcentitysendflags[number] = 0;
+                                               db->entno[db->num] = number;
+                                               db->sendflags[db->num] = sendflags;
+                                               db->num += 1;
+                                               client->csqcentityglobalhistory[number] = 1;
+                                               // and take note that we have begun the svc_csqcentities
+                                               // section of the packet
+                                               sectionstarted = 1;
+                                               ENTITYSIZEPROFILING_END(msg, number);
+                                               if (msg->cursize + 17 >= maxsize)
+                                                       break;
+                                               continue;
+                                       }
                                }
                        }
                        // self.SendEntity returned false (or does not exist) or the
@@ -392,6 +592,13 @@ void EntityFrameCSQC_WriteFrame (sizebuf_t *msg, int maxsize, int numstates, con
                // write index 0 to end the update (0 is never used by real entities)
                MSG_WriteShort(msg, 0);
        }
+
+       if(db->num == 0)
+               // if no single ent got added, remove the frame from the DB again, to allow
+               // for a larger history
+               EntityFrameCSQC_DeallocFrame(client, framenum);
+       
+       return sectionstarted;
 }
 
 void Protocol_UpdateClientStats(const int *stats)
@@ -489,6 +696,7 @@ void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int maxsize, int numstates, con
 
        for (i = 0, s = states;i < numstates;i++, s++)
        {
+               ENTITYSIZEPROFILING_START(msg, s->number);
                val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
                if(val && val->function)
                        continue;
@@ -632,6 +840,7 @@ void EntityFrameQuake_WriteFrame(sizebuf_t *msg, int maxsize, int numstates, con
                }
                // write the message to the packet
                SZ_Write(msg, buf.data, buf.cursize);
+               ENTITYSIZEPROFILING_END(msg, s->number);
        }
 }
 
@@ -817,6 +1026,7 @@ void EntityState_WriteFields(const entity_state_t *ent, sizebuf_t *msg, unsigned
 void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const entity_state_t *delta)
 {
        unsigned int bits;
+       ENTITYSIZEPROFILING_START(msg, ent->number);
        if (ent->active)
        {
                // entity is active, check for changes from the delta
@@ -837,6 +1047,7 @@ void EntityState_WriteUpdate(const entity_state_t *ent, sizebuf_t *msg, const en
                        MSG_WriteShort(msg, ent->number | 0x8000);
                }
        }
+       ENTITYSIZEPROFILING_END(msg, ent->number);
 }
 
 int EntityState_ReadExtendBits(void)
@@ -1723,7 +1934,7 @@ void EntityFrame5_FreeDatabase(entityframe5_database_t *d)
        Mem_Free(d);
 }
 
-void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
+static void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
 {
        if (d->maxedicts < newmax)
        {
@@ -1754,7 +1965,7 @@ void EntityFrame5_ExpandEdicts(entityframe5_database_t *d, int newmax)
        }
 }
 
-int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
+static int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
 {
        int limit, priority;
        entity_state_t *s;
@@ -1800,6 +2011,7 @@ int EntityState5_Priority(entityframe5_database_t *d, int stateindex)
 void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbits, sizebuf_t *msg)
 {
        unsigned int bits = 0;
+       ENTITYSIZEPROFILING_START(msg, s->number);
 
        prvm_eval_t *val;
        val = PRVM_EDICTFIELDVALUE((&prog->edicts[s->number]), prog->fieldoffsets.SendEntity);
@@ -1938,9 +2150,11 @@ void EntityState5_WriteUpdate(int number, const entity_state_t *s, int changedbi
                        MSG_WriteByte(msg, s->colormod[2]);
                }
        }
+
+       ENTITYSIZEPROFILING_END(msg, s->number);
 }
 
-void EntityState5_ReadUpdate(entity_state_t *s, int number)
+static void EntityState5_ReadUpdate(entity_state_t *s, int number)
 {
        int bits;
        bits = MSG_ReadByte();
@@ -2106,7 +2320,7 @@ void EntityState5_ReadUpdate(entity_state_t *s, int number)
        }
 }
 
-int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
+static int EntityState5_DeltaBits(const entity_state_t *o, const entity_state_t *n)
 {
        unsigned int bits = 0;
        if (n->active)
@@ -2283,7 +2497,7 @@ void EntityFrame5_AckFrame(entityframe5_database_t *d, int framenum)
                        d->packetlog[i].packetnumber = 0;
 }
 
-void EntityFrame5_WriteFrame(sizebuf_t *msg, int maxsize, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int movesequence)
+void EntityFrame5_WriteFrame(sizebuf_t *msg, int maxsize, entityframe5_database_t *d, int numstates, const entity_state_t *states, int viewentnum, int movesequence, qboolean need_empty)
 {
        const entity_state_t *n;
        int i, num, l, framenum, packetlognumber, priority;
@@ -2406,16 +2620,23 @@ void EntityFrame5_WriteFrame(sizebuf_t *msg, int maxsize, entityframe5_database_
                                        MSG_WriteByte(msg, svc_updatestatubyte);
                                        MSG_WriteByte(msg, i);
                                        MSG_WriteByte(msg, host_client->stats[i]);
+                                       l = 1;
                                }
                                else
                                {
                                        MSG_WriteByte(msg, svc_updatestat);
                                        MSG_WriteByte(msg, i);
                                        MSG_WriteLong(msg, host_client->stats[i]);
+                                       l = 1;
                                }
                        }
                }
        }
+
+       // only send empty svc_entities frame if needed
+       if(!l && !need_empty)
+               return;
+
        // write state updates
        if (developer_networkentities.integer >= 10)
                Con_Printf("send: svc_entities %i\n", framenum);