Allow max packet entities to be configured.

doc/server.md

@@ -131,6 +131,12 @@ Otherwise clients will be unable to connect.
 If set to 0, server will skip cinematics even if they exist. Default value
 is 1.
 
+#### `sv_max_packet_entities`
+Maximum number of entities in client frame. 0 means unlimited. Default
+value is 128. Some non-standard maps with large open areas may need this
+value increased. Consider however that default Quake 2 client can only
+render 128 entities maximum. Other clients may support more.
+
 #### `sv_reserved_slots`
 Number of client slots reserved for clients who know `sv_reserved_password`
 or `sv_password`. Must be less than `maxclients` value. Default value is 0

src/server/entities.c

@@ -585,7 +585,7 @@ void SV_BuildClientFrame(client_t *client)
 
         svs.next_entity++;
 
-        if (++frame->num_entities == MAX_PACKET_ENTITIES) {
+        if (++frame->num_entities == sv_max_packet_entities->integer) {
             break;
         }
     }

src/server/main.c

@@ -82,6 +82,7 @@ cvar_t  *sv_max_rate;
 cvar_t  *sv_calcpings_method;
 cvar_t  *sv_changemapcmd;
 cvar_t  *sv_max_download_size;
+cvar_t  *sv_max_packet_entities;
 
 cvar_t  *sv_strafejump_hack;
 cvar_t  *sv_waterjump_hack;
@@ -2212,6 +2213,7 @@ void SV_Init(void)
     sv_calcpings_method = Cvar_Get("sv_calcpings_method", "2", 0);
     sv_changemapcmd = Cvar_Get("sv_changemapcmd", "", 0);
     sv_max_download_size = Cvar_Get("sv_max_download_size", "8388608", 0);
+    sv_max_packet_entities = Cvar_Get("sv_max_packet_entities", STRINGIFY(MAX_PACKET_ENTITIES), 0);
 
     sv_strafejump_hack = Cvar_Get("sv_strafejump_hack", "1", CVAR_LATCH);
     sv_waterjump_hack = Cvar_Get("sv_waterjump_hack", "0", CVAR_LATCH);

src/server/server.h

@@ -536,6 +536,7 @@ extern cvar_t       *sv_lan_force_rate;
 extern cvar_t       *sv_calcpings_method;
 extern cvar_t       *sv_changemapcmd;
 extern cvar_t       *sv_max_download_size;
+extern cvar_t       *sv_max_packet_entities;
 
 extern cvar_t       *sv_strafejump_hack;
 #if USE_PACKETDUP