+// 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;
+ static 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");
+}